ORION NEWCO SERVICES INC
S-4, 1997-01-14
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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 As filed with the Securities and Exchange Commission on January 14, 1997
                                                   Registration No. 333-________

================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 ---------------
                                    FORM S-4
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                 ---------------

                           ORION NEWCO SERVICES, INC.
             (Exact name of registrant as specified in its charter)

<TABLE>
<CAPTION>

<S>                                     <C>                                <C>       
            Delaware                                4899                         52-2008654
(State or other jurisdiction of         (Primary Standard Industrial          (I.R.S. Employer
 incorporation or organization)         Classification Code Number)        Identification Number)
</TABLE>

                                 ---------------

                             2440 Research Boulevard
                                    Suite 400
                            Rockville, Maryland 20850
                                 (301) 258-8101
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)

                                 ---------------

                              Richard H. Shay, Esq.
                             2440 Research Boulevard
                                    Suite 400
                            Rockville, Maryland 20850
                                 (301) 258-8101
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                 ---------------

                                    Copy to:
                             Steven M. Kaufman, Esq.
                             Hogan & Hartson L.L.P.
                           555 Thirteenth Street, N.W.
                             Washington, D.C. 20004
                                 (202) 637-5600

                                 ---------------

     Approximate date of commencement of proposed sale to the public: As soon as
practicable after this Registration Statement becomes effective.

     If the only securities  being  registered on this Form are being offered in
connection with the formation of a holding company, check the following box. [ ]

                                 ---------------

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>

====================================================================================================================================
                                                                                           Proposed maximum   
      Title of each class of             Amount to             Proposed maximum           aggregate offering         Amount of
   securities to be registered      be registered (1)       offering price per Share            price(2)        registration fee (3)
 -----------------------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                       <C>                      <C>                     <C>    
Common Stock, $.01 par value          11,097,758 shares          Not applicable           $160,917,491            $48,762
- ------------------------------------------------------------------------------------------------------------------------------------
Series A Preferred Stock                13,871 shares            Not applicable           $ 15,820,460            $ 4,794
- ------------------------------------------------------------------------------------------------------------------------------------
Series B Preferred Stock                 4,298 shares            Not applicable           $  4,718,526            $ 1,430
====================================================================================================================================
</TABLE>

(1)  This  Registration  Statement  relates  to  securities  of  the  registrant
     issuable to holders of common stock and  preferred  stock of Orion  Network
     Systems, Inc., a Delaware corporation ("Orion" ), in the proposed merger of
     a wholly-owned subsidiary of Registrant with and into Orion.(the "Merger").

(2)  Pursuant to Rule 457(f),  the registration fee was computed on the basis of
     (i) the market  value of Orion  common stock to be exchanged in the Merger,
     computed in accordance  with Rule 457(c) on the basis of the average of the
     high and low  prices  per share of such  stock as  reported  by the  Nasdaq
     National  Market  System on  January 9, 1997 and (ii) the book value of the
     Series A Preferred  Stock and Series B Preferred  Stock as of September 30,
     1996 computed in accordance with Rule 457(f)(2)

(3)  Of the $54,996 total  registration  fee,  $29,346 has been previously  paid
     in connection  with a Schedule 14A filed by Orion on November 27, 1996.

         THE REGISTRANT HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE
OR DATES AS MAY BE NECESSARY TO DELAY ITS  EFFECTIVE  DATE UNTIL THE  REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES  ACT OF 1933, OR UNTIL THE  REGISTRATION  STATEMENT  SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION,  ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

================================================================================

<PAGE>



                         ORION NETWORK SYSTEMS, INC.
                      2440 RESEARCH BOULEVARD, SUITE 400
                          ROCKVILLE, MARYLAND 20850


                               January 15, 1997


Dear Stockholder:

   You are cordially  invited to attend a special meeting of  stockholders  (the
"Special Meeting") of Orion Network Systems, Inc. ("Orion" or the "Company"), to
be held on Thursday, January 30, 1997 at 9:00 a.m., local time, at 2440 Research
Boulevard, Suite 400, Rockville, Maryland.

   As described in the accompanying Proxy  Statement/Prospectus,  at the Special
Meeting, Orion stockholders will be asked to consider and act upon the following
proposals:


   (1)   Ratification   of  the  Agreement  and  Plan  of  Merger  (the  "Merger
Agreement"),  dated as of January 8, 1997,  among Orion,  Orion Newco  Services,
Inc.,  a newly  formed  Delaware  corporation  with  no  significant  assets  or
liabilities and a wholly owned  subsidiary of Orion ("Orion  Newco"),  and Orion
Merger  Company,  Inc., a newly formed  Delaware  corporation and a wholly owned
subsidiary  of Orion Newco ("Orion  Merger  Subsidiary"),  and the  transactions
contemplated thereby.


   (2) Approval and adoption of the Section 351 Exchange  Agreement  and Plan of
Conversion (the "Exchange Agreement"),  dated as of June 1996, as amended, among
Orion, Orion Satellite Corporation,  a Delaware corporation ("OrionSat") that is
a wholly owned subsidiary of Orion and the sole general partner of International
Private  Satellite  Partners,  L.P.,  a  Delaware  limited  partnership  ("Orion
Atlantic"),  and each of the existing  limited  partners of Orion Atlantic other
than Orion (the  "Exchanging  Partners,"  and together with Orion,  the "Limited
Partners") and the transactions contemplated thereby.


   (3) Approval of the transactions (the "Debenture  Investments")  contemplated
by the Debenture  Purchase  Agreement (the "Debenture  Agreement"),  dated as of
January  13,  1997,  among  Orion,  Orion  Newco and each of  British  Aerospace
Holdings, Inc. (collectively,  with British Aerospace Public Limited Company and
its affiliates,  "British Aerospace") and Matra Marconi Space UK Limited ("Matra
Marconi Space").

The  refinancing of $210 million of existing  indebtedness  of Orion Atlantic to
release the existing  commitments of the Limited  Partners and their  affiliates
supporting such indebtedness is a condition to the Merger,  the Exchange and the
Debenture Investments, as discussed below.

   Merger.  Pursuant to the Merger  Agreement,  Orion Merger  Subsidiary will be
merged with and into Orion in a tax-free  reorganization  (the "Merger").  Orion
will be the surviving  corporation  in the Merger and will become a wholly owned
subsidiary of Orion Newco.  In the Merger,  each share of Orion's  common stock,
par  value  $.01 per share  (the  "Orion  Common  Stock"),  Orion's  Series A 8%
Cumulative Redeemable Convertible Preferred Stock (the "Orion Series A Preferred
Stock") and Series B 8% Cumulative  Redeemable  Convertible Preferred Stock (the
"Orion Series B Preferred Stock," and together with the Orion Series A Preferred
Stock, the "Orion Senior Preferred Stock") will be converted, without any action
on the part of the holder thereof,  into the right to receive one share of Orion
Newco's common stock, par value $.01 per share (the "Orion Newco Common Stock"),
Orion Newco's Series A 8% Cumulative Redeemable Convertible Preferred Stock (the
"Orion Newco Series A Preferred Stock") and Orion Newco's Series B 8% Cumulative
Redeemable  Convertible  Preferred  Stock (the "Orion  Newco  Series B Preferred
Stock," and together with the Orion Newco Series A Preferred  Stock,  the "Orion
Newco Senior Preferred Stock"),  respectively. It is expected that approximately
10,974,121  shares of Orion Newco  Common  Stock,  13,871  shares of Orion Newco
Series A  Preferred  Stock and 4,298  shares of Orion  Newco  Series B Preferred
Stock will be issued to the  stockholders of Orion in the Merger in exchange for
their shares of Orion  Common  Stock,  Orion Series A Preferred  Stock and Orion
Series B Preferred  Stock,  respectively.  Such  shares of Orion Newco  Series A
Preferred

<PAGE>
Stock and Orion Newco  Series B Preferred  Stock will be  convertible  as of the
issuance date into an aggregate of approximately 2,053,255 shares of Orion Newco
Common Stock,  or  approximately  7.9% of the shares of Orion Newco Common Stock
outstanding  on a fully  diluted  basis,  assuming a closing of the Merger as of
January 30, 1997.

   Orion Newco will have,  after the Merger,  a  certificate  of  incorporation,
bylaws,  management  and capital  structure  (before the issuance of Orion Newco
Series  C  Preferred  Stock  described  below)  substantially  identical  in all
material respects to those of Orion. As a result of the Merger,  (i) Orion Newco
will become a public  holding  company owning all of the capital stock of Orion,
which will continue its business and  operations,  and (ii) the  stockholders of
Orion  Newco will have  substantially  the same  securities  and rights in Orion
Newco that they had in Orion,  except that their  percentage  ownership of Orion
Newco will be diluted as a result of the Exchange (as defined  below).  Approval
of the Merger  Agreement also will constitute the approval of the specific terms
therein and the  transactions  contemplated  thereunder,  including  the Merger.
Prior to voting on the Merger,  Orion  stockholders  should review carefully the
Merger  Agreement,  a copy  of  which  is  attached  to the  accompanying  Proxy
Statement/Prospectus as Attachment A.

   Exchange.  Pursuant to the Exchange Agreement,  Orion has agreed, among other
things, to have Orion Newco issue shares of Orion Newco's Series C 6% Cumulative
Redeemable  Convertible  Preferred  Stock (the "Orion  Newco  Series C Preferred
Stock") for the  Exchanging  Partners'  limited  partnership  interests in Orion
Atlantic and other rights relating thereto (the "Exchange" and together with the
Merger, the "Merger Transactions").  As a result of the Exchange,  which will be
consummated  concurrently with the Merger,  Orion Newco will become the owner of
all the partnership  interests in Orion Atlantic  (through Orion Newco and Orion
as the sole limited  partners and OrionSat as the sole general  partner of Orion
Atlantic).  In addition,  Orion Newco will acquire certain rights currently held
by the Exchanging Partners, including the Exchanging Partners' rights to receive
repayment  of  various  advances  (aggregating  approximately  $37.5  million at
September 30, 1996) made to Orion  Atlantic.  The 121,988  shares of Orion Newco
Series  C  Preferred  Stock  expected  to be  issued  in the  Exchange  will  be
convertible as of the issuance date into approximately 6,970,740 shares of Orion
Newco Common  Stock,  or  approximately  27% of the shares of Orion Newco Common
Stock  outstanding  on a fully diluted  basis,  assuming a closing of the Merger
Transactions  as of January 30, 1997 (the number of shares could increase if the
closing  occurs after that date).  As a result of the  Exchange,  certain of the
Exchanging  Partners  will be principal  stockholders  of Orion Newco.  Prior to
voting on the Exchange,  Orion stockholders should review carefully the Exchange
Agreement,   a  copy  of   which  is   attached   to  the   accompanying   Proxy
Statement/Prospectus as Attachment B.

   Debenture Investments.  Pursuant to the Debenture Agreement,  Orion Newco has
agreed,  among other  things,  to issue to British  Aerospace  and Matra Marconi
Space  $50  million  and  $10  million,   respectively,  of  convertible  junior
subordinated debentures (the "Debentures").  The Debentures will mature 15 years
following the date of issuance and will bear interest at rate of 8.75% per annum
to be paid semi-annually in arrears solely in Orion Newco Common Stock at prices
of between  $10.21 and $14.00 per share.  The Debentures to be issued to British
Aerospace and Matra Marconi  Space will be  convertible  as of the issuance date
into  approximately  3,571,429  and 714,286  shares of Orion Newco Common Stock,
respectively,  or  approximately  13.8% and 2.8% of the  shares  of Orion  Newco
Common Stock  outstanding  on a fully diluted  basis,  assuming a closing of the
Debenture  Investments  as of January  30,  1997.  As a result of the  Debenture
Investments  (and the  other  transactions,  including  the  Exchange,  in which
British  Aerospace  and an  affiliate  of  Matra  Marconi  Space  are  acquiring
securities of Orion Newco), British Aerospace will be the largest stockholder of
Orion Newco on both an actual and a fully  diluted basis and Matra Marconi Space
will be one of the principal  stockholders of Orion Newco.  The  consummation of
the Debenture Investments is a condition to the Exchange.

   Reasons for Merger Transactions and Debenture Investments.  Orion's principal
objective  for the Merger  Transactions  is to simplify  Orion's  organizational
structure and improve its access to the capital markets. Orion believes that the
Merger  Transactions  will  enable  it  to:  (i)  consolidate  outside  investor
ownership at the Orion Newco level, (ii) improve the speed and efficiency of its
decision  making,  (iii) provide  Orion Newco with 100%  ownership of all of its
material subsidiaries, (iv) allow Orion

<PAGE>
Newco to pursue  independently  its business plans and financings for all of its
satellites,  (v)  eliminate  (in exchange  for Orion Newco stock)  approximately
$37.5 million of obligations Orion Atlantic owes to the Exchanging  Partners and
(vi) increase Orion's overall market  capitalization.  Orion's  principal reason
for the issuance of $50 million of Debentures  to British  Aerospace is to raise
additional  capital for initial  payments with respect to the Orion 2 satellite,
of which  approximately  $49.4 million of payments are due during 1997. The sale
of $10 million of Debentures to Matra Marconi Space will involve a re-investment
by Matra Marconi Space of $10 million of the $13 million of satellite  incentive
payments  Matra  Marconi  Space  will  receive  as  manufacturer  of the Orion 1
satellite upon consummation of the Notes Offering described below.

   Access to the capital  markets is necessary for Orion to achieve its business
plan to construct and launch two additional  satellites,  Orion 2 (with coverage
of Europe,  Russia,  the eastern  United  States and Latin  America) and Orion 3
(with coverage of the Asia Pacific  region).  With this plan in mind,  Orion and
Orion  Newco  have been  pursuing  and will  continue  to pursue  the  following
transactions:

   (i) Notes  Offering:  a  financing  consisting  of units of senior  notes and
common stock warrants (the "Notes Offering") in the amount of approximately $347
million with expected gross proceeds of  approximately  $275 million,  excluding
approximately  $72 million of  overfunding  of interest  due on such notes.  The
principal  purpose of the Notes  Offering is to refinance  the  indebtedness  of
Orion Atlantic  outstanding  under the existing Credit Agreement  (together with
any related  documents  and  agreements,  the "Orion 1 Credit  Facility")  dated
December  6, 1991  among  Orion  Atlantic,  the Banks  named  therein  and Chase
Manhattan  Bank  (National  Association),  as Agent,  and release  the  existing
commitments of the Limited Partners and their affiliates under the Communication
Satellite Capacity Agreements,  the Contingent Communications Satellite Capacity
Agreements and various  guarantees or other  commitments  supporting the Orion 1
Credit Facility. Such release is a condition to the Exchange.

   (ii) Orion 2 Construction  Contract:  a satellite  procurement  contract with
Matra Marconi Space for Orion 2, under which the manufacturer is to proceed with
construction  based upon  initial  payments of $25 million and further  payments
through  December 1997 limited to  approximately  $25 million.  Orion expects to
commence the  construction  of Orion 2 immediately  following  completion of the
Notes Offering.

   (iii) Orion 3 Construction  Contract:  a satellite  procurement contract with
Hughes Space and Communications International, Inc. for Orion 3, under which the
manufacturer is to proceed with construction based upon initial payments through
January 31, 1997 of  approximately  $15 million,  with further  payments through
March 31, 1998 being  limited to $35  million,  payable in  approximately  equal
quarterly  installments.  The majority of the amounts due under the contract are
payable in the second and third quarters of 1998.  Orion commenced  construction
of Orion 3 in mid-December  1996 under an authorization to proceed,  and expects
to enter into a definitive satellite contract in January 1997.

   In addition to the Merger, the Notes Offering and the Debenture  Investments,
the Exchange is indirectly  conditioned on, among other things,  the acquisition
by Orion of the only  outstanding  minority  interest in Asia Pacific  Space and
Communications,  Ltd. from British Aerospace for approximately  86,000 shares of
Orion Common Stock,  which has occurred or is in the process of  occurring.  See
information  under the  captions  "Pro Forma  Condensed  Consolidated  Financial
Statements"  and "The  Merger,  the Exchange and the  Debenture  Investments  --
Reasons  for the  Merger  Transactions  and the  Debenture  Investments"  in the
accompanying Proxy Statement/Prospectus.

   The accompanying Proxy  Statement/Prospectus  provides a detailed description
of the Merger  Transactions  and the Debenture  Investments,  including  Orion's
reasons for entering into the Merger Transactions and the Debenture  Investments
and  the  effect  of the  transactions  on  Orion  and  Orion  Newco  and  their
stockholders,  and of the  business and  financial  condition of Orion and Orion
Newco. I urge you to read the accompanying Proxy Statement/Prospectus carefully.

   The matters to be  considered  and voted upon at the  Special  Meeting are of
great  importance  to your  investment  and the  future of Orion.  Your Board of
Directors has carefully  reviewed and considered the terms and conditions of the
Merger  Transactions and the Debenture  Investments and recom-
<PAGE>

mended  unanimously  (with the British Aerospace Board  representative  recusing
himself) that stockholders vote for ratification of the Merger Agreement and the
transactions  contemplated  thereby,  for  approval and adoption of the Exchange
Agreement and the  transactions  contemplated  thereby,  and for approval of the
Debenture Investments.  Your Board of Directors also has received the opinion of
its  financial   advisor,   Salomon   Brothers  Inc,  to  the  effect  that  the
consideration to be paid by Orion in connection with the Exchange is fair from a
financial  point of view to Orion.  A copy of that  opinion is  attached  to the
accompanying Proxy Statement/Prospectus as Attachment D.

   Each  proposal to be  considered  at the Special  Meeting  will be voted upon
separately by the Orion stockholders. However, failure by the Orion stockholders
to approve  the  Exchange  Agreement  will result in  termination  of the Merger
Agreement  by Orion,  Orion Newco and Orion Merger  Subsidiary.  The Merger is a
condition to the Exchange and is being proposed to enable the Exchange to occur.
If the Merger were to cease to be necessary to consummate the Exchange (which is
not expected to occur), the Board of Directors would cause Orion to proceed with
the Exchange but not the Merger.  In such event,  Orion (instead of Orion Newco)
would issue shares of Series C 6% Cumulative  Redeemable  Convertible  Preferred
Stock  for the  Exchanging  Partners'  limited  partnership  interests  in Orion
Atlantic and other rights  relating  thereto and Orion  (instead of Orion Newco)
would issue the Debentures,  but all other aspects of these  transactions  would
remain  the  same.  Since the  rights of  stockholders  of Orion  Newco  will be
substantially  the same as the rights of stockholders  of Orion,  Orion believes
that  consummation  of the Exchange  would have the same effect on  stockholders
whether or not the Merger occurs.  The Merger and the Exchange are conditions to
the Debenture  Investments,  and waivers of these conditions are not expected to
occur.  Repayment of the Orion 1 Credit  Facility is a condition to the Exchange
and the Debenture Investments, and this condition is not expected to be waived.

   Regardless of your plans for attending in person,  it is important  that your
shares be represented  and voted at the Special  Meeting.  Accordingly,  you are
requested to  complete,  sign,  date and return the  enclosed  proxy card in the
enclosed  postage  paid  envelope.  Signing this proxy will not prevent you from
voting in person  should you be able to attend  the  Special  Meeting,  but will
assure that your vote is counted if, for any reason, you are unable to attend.

   We hope  that you can  attend  the  Special  Meeting  of  Stockholders.  Your
interest  and  support  in the  affairs  of  Orion  Network  Systems,  Inc.  are
appreciated. 


                                        Sincerely,

                                        W. NEIL BAUER
                                        President and Chief Executive Officer


Rockville, Maryland
January 15, 1997

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
                      2440 RESEARCH BOULEVARD, SUITE 400
                          ROCKVILLE, MARYLAND 20850
                                (301) 258-8101

                  NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON JANUARY 30, 1997

   NOTICE IS HEREBY GIVEN that a special meeting of  stockholders  (the "Special
Meeting") of Orion Network  Systems,  Inc.  ("Orion")  will be held on Thursday,
January 30, 1997 at 9:00 a.m.,  local time,  at 2440 Research  Boulevard,  Suite
400, Rockville, Maryland, to consider and act upon the following proposals:

     1.   Ratification  of  the  Agreement  and  Plan  of  Merger  (the  "Merger
          Agreement"),  dated as of January 8, 1997,  among  Orion,  Orion Newco
          Services,   Inc.,  a  newly  formed  Delaware   corporation   with  no
          significant  assets or  liabilities  and a wholly owned  subsidiary of
          Orion ("Orion Newco"), and Orion Merger Company,  Inc., a newly formed
          Delaware  corporation  and a wholly  owned  subsidiary  of Orion Newco
          ("Orion  Merger  Subsidiary"),   and  the  transactions   contemplated
          thereby.  Pursuant to the Merger Agreement,  which was entered into by
          Orion under Section 251(g) of the Delaware  General  Corporation  Law,
          Orion  Merger  Subsidiary  will be  merged  with and into  Orion  (the
          "Merger"),  Orion will become a wholly owned subsidiary of Orion Newco
          and each share of Orion  capital stock issued and  outstanding  at the
          effective  time of the  Merger  will be  converted  into the  right to
          receive  one share of  substantially  identical  Orion  Newco  capital
          stock.

     2.   Approval and adoption of the Section 351 Exchange  Agreement  and Plan
          of Conversion  (the "Exchange  Agreement"),  dated as of June 1996, as
          amended,  among  Orion,  Orion  Satellite   Corporation,   a  Delaware
          corporation  that is a wholly owned  subsidiary  of Orion and the sole
          general partner of International  Private Satellite Partners,  L.P., a
          Delaware  limited  partnership  ("Orion  Atlantic"),  and  each of the
          existing  limited  partners  of Orion  Atlantic  other than Orion (the
          "Exchanging  Partners"),  and the transactions  contemplated  thereby.
          Pursuant to the Exchange  Agreement,  Orion Newco will issue shares of
          Orion Newco's Series C 6% Cumulative Redeemable  Convertible Preferred
          Stock for the Exchanging  Partners' limited  partnership  interests in
          Orion Atlantic and other rights relating thereto (the "Exchange").

     3.   Approval   of   the   transactions   (the   "Debenture   Investments")
          contemplated  by the  Debenture  Purchase  Agreement  (the  "Debenture
          Agreement"),  dated as of January 13, 1997,  among Orion,  Orion Newco
          and each of  British  Aerospace  Holdings,  Inc.  (collectively,  with
          British Aerospace Public Limited Company and its affiliates,  "British
          Aerospace")  and  Matra  Marconi  Space  UK  Limited  ("Matra  Marconi
          Space").  Pursuant to the Debenture Agreement,  Orion Newco will issue
          to British  Aerospace  and Matra  Marconi  Space $50  million  and $10
          million,  respectively, of convertible junior subordinated debentures,
          convertible as of the issuance date into  approximately  3,571,429 and
          714,286 shares of Orion Newco common stock,  respectively,  assuming a
          closing of the Debenture Investments as of January 30, 1997.

     4.   Transaction  of such other  business as may  properly  come before the
          Special Meeting or any adjournments or postponement thereof.

   The Board of  Directors  has  carefully  considered  the terms of the  Merger
Agreement, the Exchange Agreement and the Debenture Agreement and the respective
transactions  contemplated  thereby,  and believes that the Merger, the Exchange
and the  Debenture  Investments  are in the  best  interests  of  Orion  and its
stockholders.  The Board of Directors has unanimously approved (with the British
Aerospace Board representative  recusing himself) the matters being submitted by
Orion for  stockholder  approval  or  ratification  at the  Special  Meeting and
recommended that  stockholders vote FOR ratification of the Merger Agreement and
the transactions contemplated thereby, FOR approval and adoption of the
<PAGE>
Exchange Agreement and the transactions  contemplated  thereby, and FOR approval
of the Debenture Investments. Orion anticipates that all members of the Board of
Directors  and  companies   they   represent   (who  held,  in  the   aggregate,
approximately  38% of Orion's voting stock outstanding as of September 30, 1996)
will enter into written  agreements to vote for each of the foregoing  proposals
to be considered at the Special Meeting.

   The Board of  Directors  has fixed the close of business on December 23, 1996
as the record date for the  determination of stockholders  entitled to notice of
and to vote at the Special Meeting. Only holders of Orion common stock and Orion
preferred stock of record at the close of business on that date will be entitled
to notice of and to vote at the  Special  Meeting  or any  adjournment  thereof,
unless a new record date is fixed for any adjourned  meeting.  A list of Orion's
stockholders  entitled  to  vote  at the  Special  Meeting  will  be open to the
examination of any stockholder  for any purposes  germane to the Special Meeting
during  ordinary  business  hours for a period of ten days  before  the  Special
Meeting at Orion's offices.


                                            By Order of the Board of Directors


                                            RICHARD H. SHAY
                                            Secretary


Rockville, Maryland
January 15, 1997

   IT IS IMPORTANT THAT PROXIES BE RETURNED PROMPTLY.  THEREFORE, WHETHER OR NOT
YOU PLAN TO ATTEND THE SPECIAL MEETING,  PLEASE COMPLETE,  DATE, SIGN AND RETURN
THE ENCLOSED PROXY CARD IN THE ENCLOSED  ENVELOPE,  WHICH REQUIRES NO POSTAGE IF
MAILED IN THE UNITED STATES. YOU MAY, IF YOU WISH, REVOKE YOUR PROXY AT ANY TIME
PRIOR TO THE TIME IT IS VOTED.

<PAGE>
                             TABLE OF CONTENTS OF
                 ORION NETWORK SYSTEMS, INC. PROXY STATEMENT/
                    ORION NEWCO SERVICES, INC. PROSEPCTUS

<TABLE>
<CAPTION>
                                                                                           PAGE
                                                                                         -------
<S>                                                                                        <C>
AVAILABLE INFORMATION....................................................................   6
SUMMARY..................................................................................   7
RISK FACTORS.............................................................................  20
 Risks Relating to Merger, Exchange and Debenture Investments............................  20
  Merger, Exchange and Debenture Investments Dependent on Orion 1 Credit Facility
   Refinancing...........................................................................  20
  Certain Terms of Notes Offering Not Yet Determined.....................................  20
  Risks in Implementation of Merger, Exchange and Debenture Investments..................  20
  Substantial Change in Ownership of Stock...............................................  21
  Risks Relating to Holding Company Structure............................................  21
  Risks Relating to Orion Newco Series C Preferred Stock and Debentures..................  21
 Risks Relating to Orion's Business......................................................  22
  Limited Operations; History of Losses and Negative EBITDA; Expectation of Future
   Losses................................................................................  22
  Need for Substantial Additional Capital................................................  22
  Substantial Leverage; Secured Indebtedness.............................................  23
  Risks of Satellite Loss or Reduced Performance.........................................  23
  Launch of Orion 2 and Orion 3 Subject to Significant Uncertainties.....................  25
  Risks Relating to Potential Lack of Market Acceptance and Demand; Ground Operations....  25
  Risks Concerning Ability to Manage Growth..............................................  26
  Potential Adverse Effects of Competition...............................................  26
  Approvals Needed; Regulation of Industry...............................................  27
  Uncertainties Relating to Backlog......................................................  28
  Technological Changes..................................................................  29
  Risks of Conducting International Business.............................................  29
  Dependence of Orion on Key Personnel...................................................  29
 Risks Relating to Capital Stock ........................................................  29
  Control of Orion Newco by Principal Stockholders.......................................  29
  Risks Relating to Orion Senior Preferred Stock.........................................  29
  Limitations on Dividends on Orion and Orion Newco Common Stock.........................  30
  Potential Adverse Effect of Shares Eligible for Future Sale............................  30
  Anti-Takeover and Other Provisions of the Certificate of Incorporation.................  30
THE SPECIAL MEETING......................................................................  32
 Introduction............................................................................  32
 Voting Rights and Related Matters.......................................................  32
 Votes Required..........................................................................  32
 No Dissenters' Rights...................................................................  33
 Proxies.................................................................................  33
THE MERGER, THE EXCHANGE AND THE DEBENTURE INVESTMENTS...................................  34
 Background of the Merger Transactions and the Debenture Investments.....................  34
 Reasons for the Merger Transactions and the Debenture Investments.......................  37
 The Merger Agreement....................................................................  38
 The Exchange Agreement..................................................................  40
 Description of the Orion Newco Series C Preferred Stock.................................  46
 Registration Rights.....................................................................  48
 Certain Transfer Restrictions...........................................................  49
 The Debenture Investments...............................................................  50
 Corporate Structure After the Transactions..............................................  53
 
                                        i

<PAGE>
                                                                                           PAGE
                                                                                         -------
 Effect of the Exchange on the Capital Structure of Orion Newco..........................   54
 Recommendation of the Board of Directors of Orion.......................................   54
 Opinion of Orion's Financial Advisor....................................................   54
 Approvals...............................................................................   58
 Fees and Expenses.......................................................................   58
 Certain Federal Income Tax Consequences.................................................   58
 Security Ownership of Certain Beneficial Owners Prior to and Following the Transactions.   61
THE RELATED TRANSACTIONS.................................................................   66
 The Notes Offering/Orion 1 Credit Facility Refinancing..................................   66
 OAP Acquisition.........................................................................   67
INFORMATION ABOUT ORION NEWCO............................................................   68
DESCRIPTION OF ORION NEWCO CAPITAL STOCK.................................................   68
 Orion Newco Common Stock................................................................   68
 Orion Newco Preferred Stock.............................................................   68
 Orion Newco Senior Preferred Stock......................................................   69
 Orion Newco Series C Preferred Stock....................................................   70
 Warrants and Options....................................................................   70
 Registration Rights.....................................................................   71
 Certain Anti-Takeover Effects...........................................................   71
 Listing.................................................................................   73
 Transfer Agent..........................................................................   73
ORION NEWCO SHARES ELIGIBLE FOR FUTURE SALE..............................................   73
COMPARATIVE RIGHTS OF ORION STOCKHOLDERS AND ORION NEWCO STOCKHOLDERS....................   74
INFORMATION ABOUT ORION'S BUSINESS.......................................................   75
 Overview................................................................................   75
 The Orion Strategy......................................................................   77
 Industry Overview.......................................................................   78
 Data Networking.........................................................................   79
 Orion Market Opportunity................................................................   80
 Orion Services..........................................................................   83
  Private Communications Network Services................................................   83
  Internet Backbone and Access Services..................................................   84
  Video Distribution and Other Satellite Transmission Services...........................   85
 Customers and Backlog...................................................................   86
 SELECTED ORION CUSTOMERS................................................................   86
 Sales and Marketing.....................................................................   88
 Network Operations; Local Ground Operators..............................................   89
 Migration Plan for New Markets..........................................................   90
 Implementation of the Orion Satellite System............................................   90
  Orion 1................................................................................   91
  Orion 2................................................................................   92
  Orion 3................................................................................   94
 Orbital Slots...........................................................................   96
 Insurance...............................................................................   98
 Competition.............................................................................   99
  Service Providers......................................................................   99
  Satellite Capacity.....................................................................   99
  Terrestrial Capacity...................................................................  101

                                       ii

<PAGE>
                                                                                           PAGE
                                                                                         -------
 Regulation..............................................................................  101
  Regulatory Overview....................................................................  101
  Authority to Construct, Launch and Operate Satellites..................................  102
  Consultation with INTELSAT and EUTELSAT................................................  102
  International Telecommunication Union..................................................  102
  United States Regulatory Restrictions..................................................  103
  International Regulation...............................................................  104
 Human Resources.........................................................................  104
 Legal Proceedings.......................................................................  104
MANAGEMENT OF ORION AND ORION NEWCO......................................................  106
 Directors and Executive Officers........................................................  106
 Background of Directors and Executive Officers..........................................  106
 Committees of the Board of Directors....................................................  109
 Limits on Liability; Indemnification....................................................  110
 Executive Compensation..................................................................  111
 Summary Compensation Table..............................................................  111
 Option Grants in Last Fiscal Year.......................................................  111
 Option Exercises in Last Fiscal Year and Year-end Option Values.........................  112
 Compensation of Directors...............................................................  112
 Employment Agreements and Termination of Employment and Change in Control Arrangements..  112
 Compensation Committee Interlocks and Insider Participation.............................  112
 Stock Option Plans......................................................................  112
 Other Stock Options.....................................................................  114
 Other Employee Benefit Plans............................................................  115
PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS....................................  117
SELECTED CONSOLIDATED FINANCIAL AND OPERATIONAL DATA OF ORION............................  124
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF
 ORION...................................................................................  126
 General.................................................................................  126
 Overview................................................................................  126
 Results of Operations...................................................................  127
 Liquidity and Capital Resources.........................................................  130
 Taxes...................................................................................  132
 Effect of Inflation.....................................................................  133
 Effect of Recently Issued Financial Accounting Standards................................  133
PRICE RANGE OF ORION COMMON STOCK AND DIVIDEND POLICY....................................  134
CERTAIN TRANSACTIONS.....................................................................  135
FORWARD-LOOKING STATEMENTS...............................................................  137
OTHER MATTERS............................................................................  138
LEGAL MATTERS............................................................................  138
EXPERTS..................................................................................  138
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS OF ORION NETWORK SYSTEMS, INC. ...............  F-1
GLOSSARY.................................................................................  G-1
ATTACHMENTS
ATTACHMENT A -- AGREEMENT AND PLAN OF MERGER
ATTACHMENT B -- SECTION 351 EXCHANGE AGREEMENT AND PLAN OF CONVERSION
ATTACHMENT C -- FORM OF  CERTIFICATE  OF  DESIGNATIONS  FOR ORION NEWCO SERIES C
                PREFERRED STOCK 
ATTACHMENT D -- FAIRNESS OPINION OF SALOMON BROTHERS INC
</TABLE>

                                      iii
<PAGE>

                         ORION NETWORK SYSTEMS, INC.
                      2440 RESEARCH BOULEVARD, SUITE 400
                          ROCKVILLE, MARYLAND 20850

                          ORION NEWCO SERVICES, INC.
                      2440 RESEARCH BOULEVARD, SUITE 400
                          ROCKVILLE, MARYLAND 20850

                 ORION NETWORK SYSTEMS, INC. PROXY STATEMENT/
                    ORION NEWCO SERVICES, INC. PROSPECTUS

                       SPECIAL MEETING OF STOCKHOLDERS
                        OF ORION NETWORK SYSTEMS, INC.
                        TO BE HELD ON JANUARY 30, 1997


   This Proxy Statement/Prospectus  ("Proxy  Statement/Prospectus") is furnished
to stockholders  of Orion Network  Systems,  Inc.  ("Orion" or the "Company") in
connection  with the  solicitation by the Board of Directors of Orion of proxies
to be used at a special meeting of stockholders of Orion (the "Special Meeting")
and at any adjournments  thereof.  The Special Meeting will be held on Thursday,
January 30, 1997 at 9:00 a.m.,  local time,  at 2440 Research  Boulevard,  Suite
400, Rockville,  Maryland. This Proxy Statement/Prospectus and form of proxy are
first being sent or given to stockholders on or about January 15, 1997. 

   At the Special Meeting,  Orion stockholders will be asked to consider and act
upon the following proposals:

   (1)   Ratification   of  the  Agreement  and  Plan  of  Merger  (the  "Merger
Agreement"),  dated as of January 8, 1997,  among Orion,  Orion Newco  Services,
Inc.,  a newly  formed  Delaware  corporation  with  no  significant  assets  or
liabilities and a wholly owned  subsidiary of Orion ("Orion  Newco"),  and Orion
Merger  Company,  Inc., a newly formed  Delaware  corporation and a wholly owned
subsidiary  of Orion Newco ("Orion  Merger  Subsidiary"),  and the  transactions
contemplated thereby. 

   (2) Approval and adoption of the Section 351 Exchange  Agreement  and Plan of
Conversion (the "Exchange Agreement"),  dated as of June 1996, as amended, among
Orion, Orion Satellite Corporation,  a Delaware corporation ("OrionSat") that is
a wholly owned subsidiary of Orion and the sole general partner of International
Private  Satellite  Partners,  L.P.,  a  Delaware  limited  partnership  ("Orion
Atlantic"),  and each of the existing  limited  partners of Orion Atlantic other
than Orion (the  "Exchanging  Partners,"  and together with Orion,  the "Limited
Partners") and the transactions contemplated thereby.

   (3) Approval of the transactions (the "Debenture  Investments")  contemplated
by the Debenture  Purchase  Agreement (the "Debenture  Agreement"),  dated as of
January  13,  1997,  among  Orion,  Orion  Newco and each of  British  Aerospace
Holdings, Inc. (collectively,  with British Aerospace Public Limited Company and
its affiliates,  "British Aerospace") and Matra Marconi Space UK Limited ("Matra
Marconi Space").

The  refinancing of $210 million of existing  indebtedness  of Orion Atlantic to
release the existing  commitments of the Limited  Partners and their  affiliates
supporting such indebtedness is a condition to the Merger,  the Exchange and the
Debenture Investments, as discussed below.

   Merger.  Pursuant  to the  Merger  Agreement,  which was  entered  into under
Section 251(g) of the Delaware General  Corporation Law, Orion Merger Subsidiary
will be merged with and into Orion in a tax-free  reorganization (the "Merger").
Orion will be the surviving  corporation  in the Merger and will become a wholly
owned  subsidiary of Orion Newco.  In the Merger,  each share of Orion's  common
stock, par value $.01 per share (the "Orion Common Stock"),  Orion's Series A 8%
Cumulative Redeemable Convertible Preferred Stock (the "Orion Series A Preferred
Stock") and Series B 8% Cumulative  Redeemable  Convertible Preferred Stock (the
"Orion Series B Preferred Stock," and together with the Orion Series A Preferred
Stock, the "Orion Senior Preferred Stock") will be converted, 


<PAGE>

without any action on the part of the holder thereof,  into the right to receive
one share of Orion Newco's  common  stock,  par value $.01 per share (the "Orion
Newco  Common  Stock"),   Orion  Newco's  Series  A  8%  Cumulative   Redeemable
Convertible  Preferred  Stock (the "Orion Newco  Series A Preferred  Stock") and
Orion Newco's Series B 8% Cumulative Redeemable Convertible Preferred Stock (the
"Orion Newco Series B Preferred Stock," and together with the Orion Newco Series
A Preferred Stock, the "Orion Newco Senior Preferred Stock"),  respectively.  It
is expected that  approximately  10,974,121  shares of Orion Newco Common Stock,
13,871 shares of Orion Newco Series A Preferred  Stock and 4,298 shares of Orion
Newco Series B Preferred  Stock will be issued to the  stockholders  of Orion in
the Merger in exchange for their shares of Orion  Common  Stock,  Orion Series A
Preferred Stock and Orion Series B Preferred Stock, respectively. Such shares of
Orion Newco Series A Preferred  Stock and Orion Newco  Series B Preferred  Stock
will be convertible  as of the issuance date into an aggregate of  approximately
2,053,255  shares of Orion Newco  Common  Stock,  or  approximately  7.9% of the
shares  of Orion  Newco  Common  Stock  outstanding  on a fully  diluted  basis,
assuming a closing of the Merger as of January 30, 1997.

   Orion Newco will have,  after the Merger,  a  certificate  of  incorporation,
bylaws,  management  and capital  structure  (before the issuance of Orion Newco
Series  C  Preferred  Stock  described  below)  substantially  identical  in all
material respects to those of Orion. As a result of the Merger,  (i) Orion Newco
will become a public  holding  company owning all of the capital stock of Orion,
which will continue its business and  operations,  and (ii) the  stockholders of
Orion  Newco will have  substantially  the same  securities  and rights in Orion
Newco that they had in Orion,  except that their  percentage  ownership of Orion
Newco will be diluted as a result of the Exchange (as defined  below).  Approval
of the Merger Agreement also shall constitute the approval of the specific terms
therein and the  transactions  contemplated  thereunder,  including  the Merger.
Prior to voting on the Merger,  Orion  stockholders  should review carefully the
Merger Agreement, a copy of which is attached to this Proxy Statement/Prospectus
as Attachment A.

   Exchange.  Pursuant to the Exchange Agreement,  Orion has agreed, among other
things, to have Orion Newco issue shares of Orion Newco's Series C 6% Cumulative
Redeemable  Convertible  Preferred  Stock (the "Orion  Newco  Series C Preferred
Stock") for the  Exchanging  Partners'  limited  partnership  interests in Orion
Atlantic and other rights relating thereto (the "Exchange" and together with the
Merger, the "Merger Transactions").  As a result of the Exchange,  which will be
consummated  concurrently with the Merger,  Orion Newco will become the owner of
all the partnership  interests in Orion Atlantic  (through Orion Newco and Orion
as the sole limited  partners and OrionSat as the sole general  partner of Orion
Atlantic).  In addition,  Orion Newco will acquire certain rights currently held
by the Exchanging Partners, including the Exchanging Partners' rights to receive
repayment  of  various  advances  (aggregating  approximately  $37.5  million at
September 30, 1996) made to Orion Atlantic.  The approximately 121,988 shares of
Orion Newco Series C Preferred  Stock expected to be issued in the Exchange will
be convertible as of the issuance date into  approximately  6,970,740  shares of
Orion Newco  Common  Stock,  or  approximately  27% of the shares of Orion Newco
Common Stock  outstanding  on a fully diluted  basis,  assuming a closing of the
Merger  Transactions as of January 30, 1997 (the number of shares could increase
if the closing occurs after that date). As a result of the Exchange,  certain of
the Exchanging Partners will be principal  stockholders of Orion Newco. Prior to
voting on the Exchange,  Orion stockholders should review carefully the Exchange
Agreement,  a copy of which is  attached to this Proxy  Statement/Prospectus  as
Attachment B.

   Debenture Investments.  Pursuant to the Debenture Agreement,  Orion Newco has
agreed,  among other  things,  to issue to British  Aerospace  and Matra Marconi
Space  $50  million  and  $10  million,   respectively,  of  convertible  junior
subordinated debentures (the "Debentures").  The Debentures will mature 15 years
following  the date of  issuance  and will bear  interest at a rate of 8.75% per
annum to be paid  semi-annually in arrears solely in Orion Newco Common Stock at
prices of between  $10.21 and $14.00 per share.  The  Debentures to be issued to
British Aerospace and Matra Marconi Space will be convertible as of the issuance
date into  approximately  3,571,429  and 714,286  shares of Orion  Newco  Common
Stock,  respectively,  or  approximately  13.8% and 2.8% of the  shares of Orion
Newco Common Stock  outstanding on a fully diluted basis,  assuming a closing of
the Debenture  Investments  as of January 30, 1997. As a result of the Debenture
Investments (and the other transactions, including the Ex- 

                                        2

<PAGE>
change,  in which British  Aerospace and an affiliate of Matra Marconi Space are
acquiring  securities of Orion  Newco),  British  Aerospace  will be the largest
stockholder of Orion Newco on both an actual and a fully diluted basis and Matra
Marconi  Space will be one of the  principal  stockholders  of Orion Newco.  The
consummation of the Debenture Investments is a condition to the Exchange.

   Reasons for Merger Transactions and Debenture Investments.  Orion's principal
objective  for the Merger  Transactions  is to simplify  Orion's  organizational
structure and improve its access to the capital markets. Orion believes that the
Merger  Transactions  will  enable  it  to:  (i)  consolidate  outside  investor
ownership at the Orion Newco level, (ii) improve the speed and efficiency of its
decision  making,  (iii) provide  Orion Newco with 100%  ownership of all of its
material  subsidiaries,  (iv)  allow  Orion  Newco to pursue  independently  its
business  plans and  financings  for all of its  satellites,  (v)  eliminate (in
exchange for Orion Newco stock) approximately $37.5 million of obligations Orion
Atlantic  owes to the  Exchanging  Partners and (vi)  increase  Orion's  overall
market capitalization.  Orion's principal reason for the issuance of $50 million
of Debentures to British  Aerospace is to raise  additional  capital for initial
payments  with respect to the Orion 2 satellite,  of which  approximately  $49.4
million of payments are due during 1997.  The sale of $10 million of  Debentures
to Matra  Marconi Space will involve a  re-investment  by Matra Marconi Space of
$10 million of the $13 million of satellite  incentive  payments  Matra  Marconi
Space will receive as manufacturer of the Orion 1 satellite upon consummation of
the Notes Offering described below.

   Access to the capital  markets is necessary for Orion to achieve its business
plan to construct and launch two additional  satellites,  Orion 2 (with coverage
of Europe,  Russia,  the eastern  United  States and Latin  America) and Orion 3
(with coverage of the Asia Pacific  region).  With this plan in mind,  Orion and
Orion  Newco  have been  pursuing  and will  continue  to pursue  the  following
transactions:

   (i) Notes  Offering:  a financing  consisting  of units of senior  notes (the
"Notes")  and common  stock  warrants  (the "Notes  Offering")  in the amount of
approximately  $347 million with expected gross proceeds of  approximately  $275
million,  excluding  approximately $72 million of overfunding of interest due on
such notes.  The  principal  purpose of the Notes  Offering is to refinance  the
indebtedness of Orion Atlantic  outstanding  under the existing Credit Agreement
(together  with  any  related  documents  and  agreements,  the  "Orion 1 Credit
Facility") dated December 6, 1991 among Orion Atlantic,  the Banks named therein
(the  "Banks")  and  Chase  Manhattan  Bank  (National  Association),  as  Agent
("Chase"),  and release the  existing  commitments  of the Limited  Partners and
their affiliates under the  Communication  Satellite  Capacity  Agreements,  the
Contingent  Communications  Satellite Capacity Agreements and various guarantees
or other commitments supporting the Orion 1 Credit Facility  (collectively,  the
"Orion 1 Credit Facility Support"). Such release is a condition to the Exchange.

   (ii) Orion 2 Construction  Contract:  a satellite  procurement  contract with
Matra Marconi Space for Orion 2 (the "Orion 2 Satellite Contract"),  under which
the manufacturer is to proceed with construction  based upon initial payments of
$25 million and further  payments through December 1997 limited to approximately
$25 million.  Orion expects to commence the  construction of Orion 2 immediately
following completion of the Notes Offering.

   (iii) Orion 3 Construction  Contract:  a satellite  procurement contract with
Hughes  Space for Orion 3 (the  "Orion 3 Satellite  Contract"),  under which the
manufacturer is to proceed with construction based upon initial payments through
January 31, 1997 of  approximately  $15 million,  with further  payments through
March 31, 1998 being  limited to $35  million,  payable in  approximately  equal
quarterly  installments.  The majority of the amounts due under the contract are
payable in the second and third quarters of 1998.  Orion commenced  construction
of Orion 3 in mid-December  1996 under an authorization to proceed,  and expects
to enter into a definitive satellite contract in January 1997. 

   In addition to the Merger, the Notes Offering and the Debenture  Investments,
the Exchange is indirectly  conditioned on, among other things,  the acquisition
by Orion of the only  outstanding  minority  interest in Asia Pacific  Space and
Communcations,   Ltd.   ("Orion  Asia  Pacific")  from  British   Aerospace  for
approximately 86,000 shares of Orion Newco Common Stock (the "OAP Acquisition"),
which has occurred or is in the process of  occurring.  The pro forma  financial
information included in this Proxy  Statement/Prospectus gives effect to Merger,
the Exchange and the Debenture Investments, and the

                                       3
<PAGE>
transactions  on which they are  conditioned  (the Merger  Transactions  and the
Debenture   Investments   collectively   with  such   other   tranactions,   the
"Transactions"),   including  the  Notes  Offering,  the  OAP  Acquisition,  the
application  of the net  proceeds  of the Notes  Offering  to effect the Orion 1
Credit  Refinancing  and  repayment of amounts  owed to STET,  a former  Limited
Partner,  and the  use of the  proceeds  of the  Debenture  Investments  to make
initial  payments  on Orion 2 (initial  payments  on Orion 3 are to be made from
cash on hand). See "Pro Forma Condensed  Consolidated  Financial Statements" and
"The  Merger,  the  Exchange and the  Debenture  Investments  -- Reasons for the
Merger   Transactions   and  the   Debenture   Investments"   and  "The  Related
Transactions."
 
   Each  proposal to be  considered  at the Special  Meeting  will be voted upon
separately by the Orion stockholders. However, failure by the Orion stockholders
to approve  the  Exchange  Agreement  will result in  termination  of the Merger
Agreement  by Orion,  Orion Newco and Orion Merger  Subsidiary.  The Merger is a
condition to the Exchange and is being proposed to enable the Exchange to occur.
If the Merger were to cease to be necessary to consummate the Exchange (which is
not expected to occur), the Board of Directors would cause Orion to proceed with
the Exchange but not the Merger.  In such event,  Orion (instead of Orion Newco)
would issue shares of Series C 6% Cumulative  Redeemable  Convertible  Preferred
Stock  for the  Exchanging  Partners'  limited  partnership  interests  in Orion
Atlantic and other rights  relating  thereto and Orion  (instead of Orion Newco)
would issue the Debentures,  but all other aspects of these  transactions  would
remain  the  same.  Since the  rights of  stockholders  of Orion  Newco  will be
substantially  the same as the rights of stockholders  of Orion,  Orion believes
that  consummation  of the Exchange  would have the same effect on  stockholders
whether or not the Merger occurs.  The Merger and the Exchange are conditions to
the Debenture  Investments,  and waivers of these conditions are not expected to
occur.  Repayment of the Orion 1 Credit  Facility is a condition to the Exchange
and the Debenture Investments, and this condition is not expected to be waived.

   This Proxy Statement/Prospectus provides a detailed description of the Merger
Transactions  and the  Debenture  Investments,  including  Orion's  reasons  for
entering  into the Merger  Transactions  and the Debenture  Investments  and the
effect of the Transactions on Orion and Orion Newco and their stockholders,  and
of the business  and  financial  condition of Orion and Orion Newco.  This Proxy
Statement/Prospectus  also  constitutes  the  prospectus for the shares of Orion
Newco Common Stock,  Orion Newco Series A Preferred Stock and Orion Newco Series
B Preferred Stock under the Securities Act of 1933, as amended (the  "Securities
Act"). Orion Newco has filed a Registration Statement on Form S-4, of which this
Proxy   Statement/Prospectus  is  a  part,  with  the  Securities  and  Exchange
Commission (the  "Commission")  with respect to the registration of such shares.

   SEE "RISK FACTORS"  BEGINNING ON PAGE 20 FOR A DISCUSSION OF CERTAIN  FACTORS
THAT SHOULD BE CONSIDERED BY ORION STOCKHOLDERS.

                                        4

<PAGE>
   THE  SECURITIES  TO BE  ISSUED  IN THE  MERGER  HAVE  NOT  BEEN  APPROVED  OR
DISAPPROVED BY THE SECURITIES  AND EXCHANGE  COMMISSION OR ANY STATE  SECURITIES
COMMISSION  NOR  HAS  THE  SECURITIES  AND  EXCHANGE  COMMISSION  OR  ANY  STATE
SECURITIES  COMMISSION  PASSED  UPON THE  ACCURACY  OR  ADEQUACY  OF THIS  PROXY
STATEMENT/PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

   THE BOARD OF DIRECTORS OF ORION HAS RECOMMENDED UNANIMOUSLY (WITH THE BRITISH
AEROSPACE BOARD  REPRESENTATIVE  RECUSING  HIMSELF) THAT  STOCKHOLDERS  VOTE FOR
RATIFICATION OF THE MERGER AGREEMENT AND THE TRANSACTIONS  CONTEMPLATED THEREBY,
FOR  ADOPTION  AND  APPROVAL  OF THE  EXCHANGE  AGREEMENT  AND THE  TRANSACTIONS
CONTEMPLATED  THEREBY,  AND  FOR  APPROVAL  OF  THE  DEBENTURE  INVESTMENTS,  AS
DESCRIBED IN THIS PROXY STATEMENT/PROSPECTUS. ORION ANTICIPATES THAT ALL MEMBERS
OF ITS BOARD OF  DIRECTORS  AND  COMPANIES  THEY  REPRESENT  (WHO  HELD,  IN THE
AGGREGATE, APPROXIMATELY 38% OF ORION'S VOTING STOCK OUTSTANDING AS OF SEPTEMBER
30, 1996) WILL ENTER INTO WRITTEN  AGREEMENTS  TO VOTE FOR EACH OF THE FOREGOING
PROPOSALS TO BE CONSIDERED AT THE SPECIAL MEETING.

       The date of this Proxy Statement/Prospectus is January 15, 1997.


                                        5

<PAGE>



                            AVAILABLE INFORMATION

   Orion is subject to the informational requirements of the Securities Exchange
Act of 1934, as amended (the "Exchange  Act").  In accordance  with the Exchange
Act,  Orion  files proxy  statements,  reports  and other  information  with the
Commission.  This  filed  material  can be  inspected  and  copied at the public
reference facilities maintained by the Commission in Washington, D.C. and at the
Regional  Offices of the  Commission  at 7 World Trade Center,  Suite 1300,  New
York,  NY 10048,  and  Citicorp  Center,  500 West Madison  Street,  Suite 1400,
Chicago,  Illinois 60661.  Copies of such material can be obtained at prescribed
rates from the Public  Reference  Room of the  Commission  at 450 Fifth  Street,
N.W.,   Washington,   D.C.  20549.  The  Commission  maintains  a  Web  site  at
http://www.sec.gov  containing  reports,  proxy and  information  statements and
other information  regarding  registrants,  including Orion and Orion Newco. The
Orion  Common  Stock is quoted on the Nasdaq  National  Market  under the symbol
"ONSI," and such reports,  proxy  statements  and other  information  concerning
Orion and Orion Newco also can be inspected at the offices of Nasdaq Operations,
1735 K Street, N.W., Washington, D.C. 20006.

   Orion Newco has filed with the  Commission a  registration  statement on Form
S-4 (herein,  together  with all  amendments  and  exhibits,  referred to as the
"Registration  Statement")  under the  Securities  Act with respect to the Orion
Newco Common Stock,  Orion Newco Series A Preferred Stock and Orion Newco Series
B  Preferred  Stock.  This Proxy  Statement/Prospectus  does not contain all the
information set forth in the Registration Statement,  certain parts of which are
omitted in accordance  with the rules and  regulations  of the  Commission.  For
further information,  reference is hereby made to the Registration Statement and
the   exhibits   filed   therewith.   Statements   contained   in   this   Proxy
Statement/Prospectus  relating to the contents of any contract or other document
referred to herein are not necessarily complete,  and in each instance reference
is made to the copy of such contact or other document filed as an exhibit to the
Registration  Statement,  each such statement being qualified in all respects by
such reference.

                                        6

<PAGE>
                                   SUMMARY


   The following is a summary of certain information contained elsewhere in this
Proxy Statement/Prospectus  and/or the Attachments hereto. Reference is made to,
and this Summary is qualified in its entirety by, the more detailed  information
contained in this Proxy  Statement/Prospectus  and such  Attachments.  Except as
otherwise indicated, information herein concerning the number of shares of Orion
capital stock issued and outstanding  prior to completion of the Transactions is
as of December 15, 1996. See "Glossary" beginning at page G-1 for definitions of
certain   defined  terms  and  certain   technical  terms  used  in  this  Proxy
Statement/Prospectus.

THE MERGER


The Merger Agreement.....     The  Agreement  and Plan of  Merger  (the  "Merger
                              Agreement"),  dated as of January  8, 1997,  among
                              Orion Network Systems, Inc. ("Orion"), Orion Newco
                              Services,  Inc.  ("Orion  Newco") and Orion Merger
                              Company,   Inc.   ("Orion   Merger   Subsidiary"),
                              pursuant to which Orion Merger  Subsidiary will be
                              merged   with  and  into   Orion  in  a   tax-free
                              reorganization,  and  Orion  will  become a wholly
                              owned  subsidiary  of Orion  Newco  under  Section
                              251(g) of the  Delaware  General  Corporation  Law
                              (the "Merger").  See "The Merger, the Exchange and
                              the Debenture  Investments -- The Merger Agreement
                              -- Terms of the Merger Agreement."                

Parties to the Merger.....    Orion was organized as a Delaware  corporation  in
                              1982.  Orion's  principal  executive  offices  are
                              located  at 2440  Research  Boulevard,  Suite 400,
                              Rockville, Maryland 20850 and its telephone number
                              is (301) 258-8101.  See "Information About Orion's
                              Business."                                        
                              
                              Orion Newco is a Delaware corporation and a wholly
                              owned  subsidiary  of Orion  organized  in 1996 by
                              Orion for the purpose of effecting  the Merger and
                              the Exchange.  Orion Newco's  principal  executive
                              offices  are located at 2440  Research  Boulevard,
                              Suite  400,  Rockville,  Maryland  20850  and  its
                              telephone  number  is (301)  258-8101.  After  the
                              Merger, the certificate of incorporation,  bylaws,
                              management and capital  structure (before issuance
                              of the Orion Newco  Series C  Preferred  Stock) of
                              Orion Newco will be substantially identical in all
                              material  respects to those of Orion.  Orion Newco
                              has no material  assets and has not engaged in any
                              activities  except in connection  with the Merger.
                              See "Information About Orion Newco."              
                              
                              Orion Merger Subsidiary is a Delaware  corporation
                              and a  wholly  owned  subsidiary  of  Orion  Newco
                              organized  in 1996 by  Orion  for the  purpose  of
                              effecting the Merger.  Orion Merger Subsidiary has
                              no  material  assets  and has not  engaged  in any
                              activities  except in connection  with the Merger.
                              See "The Merger,  the  Exchange and the  Debenture
                              Investments-- The Merger Agreement -- Terms of the
                              Merger Agreement."                                
                              
The Merger -- Structure.....  Orion  Merger  Subsidiary  will be merged with and
                              into  Orion and Orion will  become a wholly  owned
                              subsidiary  of Orion  Newco.  Each  share of Orion
                              Common Stock,  Orion Series A Preferred  Stock and
                              Orion   Series  B  Preferred   Stock   outstanding
                              immediately  prior to  consummation  of the Merger
                              will be converted,      
                              

                                        7

<PAGE>

                              without  any  action  on the  part  of the  holder
                              thereof,  into the  right  to  receive  one  newly
                              issued  share of Orion Newco Common  Stock,  Orion
                              Newco  Series A  Preferred  Stock and Orion  Newco
                              Series B Preferred Stock, respectively. The Merger
                              will  become  effective  upon  the  filing  of the
                              Delaware  Merger  Certificate  (as  defined in the
                              Merger  Agreement) with the Delaware  Secretary of
                              State,   which  is  expected  to  occur  following
                              ratification    or    approval   of   the   Merger
                              Transactions and the Debenture  Investments by the
                              requisite vote of the Orion  stockholders  and the
                              satisfaction or waiver of the other conditions set
                              forth in the  Merger  Agreement  and the  Exchange
                              Agreement.  See "The Merger,  the Exchange and the
                              Debenture  Investments -- The Merger  Agreement --
                              Terms of the Merger Agreement."

 Conditions to Consummation of
   the Merger...............  The respective obligations of each party to effect
                              the Merger are subject to  satisfaction  or waiver
                              of  certain  conditions  set  forth in the  Merger
                              Agreement,   including,   among  others:  (i)  the
                              ratification  of the  Merger  Agreement  by  Orion
                              stockholders,    (ii)   the    receipt    of   all
                              authorizations,  consents  and  approvals  of  any
                              Governmental  Entity  (as such term is used in the
                              Merger  Agreement)  necessary for  consummation of
                              the  Merger,   (iii)  the   effectiveness  of  the
                              Registration  Statement,  (iv) the  receipt  of an
                              opinion  relating  to  the  tax  treatment  of the
                              Merger,   (v)  the   continued   accuracy  of  the
                              representations  and warranties made by each party
                              in the Merger  Agreement and (vi)  consummation of
                              the  Exchange  concurrently  with the Merger.  See
                              "The  Merger,   the  Exchange  and  the  Debenture
                              Investments -- The Merger  Agreement -- Conditions
                              to Obligations to Effect the Merger."

Board of Directors after the
  Merger....................  As  provided  in the  Merger  Agreement,  upon the
                              consummation of the Merger, the Board of Directors
                              of  Orion  Newco  will   consist  of  the  current
                              directors of Orion. See "The Merger,  the Exchange
                              and  the  Debenture   Investments  --  The  Merger
                              Agreement -- Terms of the Merger Agreement."

Management after the Merger.  As  provided  in the  Merger  Agreement,  upon the
                              consummation  of the  Merger,  the  management  of
                              Orion Newco will consist of the current members of
                              Orion  management.  See "The Merger,  the Exchange
                              and  the  Debenture   Investments  --  The  Merger
                              Agreement -- Terms of the Merger Agreement."

Accounting Treatment........  The   Merger   will   be   accounted   for   as  a
                              reorganization  of entities under common  control.
                              As  a   result,   the   assets   and   liabilities
                              transferred   pursuant   to  the  Merger  will  be
                              accounted  for  at  historical  cost  in a  manner
                              similar to a pooling of interests.

Regulatory Approval.........  Orion  is  aware  of  no  governmental   approvals
                              required  for  consummation  of the Merger,  other
                              than compliance  with federal  securities laws and
                              state securities or "Blue Sky" laws.
        
Certain Federal Income 
  Tax Consequences of  
  the Merger................  In the  opinion of Ernst & Young LLP,  tax advisor
                              to Orion,  Orion stockholders whose stock of Orion
                              is  converted  into the 

                                       8

<PAGE>

                              right to receive stock of Orion Newco  pursuant to
                              the Merger (the  "Transferors")  will  qualify for
                              tax-free  treatment  pursuant to Sections  354 and
                              368 of the  Internal  Revenue  Code  of  1986,  as
                              amended    (the    "Code"),    assuming    certain
                              requirements,  such as continuity of interest, are
                              met.   Provided  the   conversion   qualifies  for
                              tax-free treatment, each Transferor's tax basis in
                              the  shares  of  Orion  Newco   capital  stock  it
                              receives  will be  equal  to its tax  basis in the
                              Orion stock it  transferred  to Orion  Newco.  All
                              Orion  stockholders  should  consult their own tax
                              advisors  concerning the tax  consequences  of the
                              Merger.  See "The  Merger,  the  Exchange  and the
                              Debenture  Investments  -- Certain  Federal Income
                              Tax Consequences."

Consequences of the Merger..  Upon the consummation of the Merger, all shares of
                              Orion  Common  Stock  and Orion  Senior  Preferred
                              Stock  shall no  longer be  outstanding  and shall
                              automatically  be  retired,  and each  holder of a
                              certificate   representing  any  shares  of  Orion
                              Common  Stock and  Orion  Senior  Preferred  Stock
                              shall  cease  to  have  any  rights  with  respect
                              thereto, except the right to receive the shares of
                              Orion Newco  Common  Stock and Orion Newco  Senior
                              Preferred Stock to be issued in exchange therefor.
                              See "The Merger,  the  Exchange and the  Debenture
                              Investments -- The Merger Agreement -- No Exchange
                              of  Certificates."  Effective upon consummation of
                              the   Merger,   Orion  will  be  a  wholly   owned
                              subsidiary  of Orion Newco,  Orion will change its
                              name to Orion Oldco Services, Inc. and, as soon as
                              practicable  thereafter,  Orion  Newco will change
                              its  name to Orion  Network  Systems,  Inc.  Orion
                              Newco   will  be  a  holding   company   following
                              consummation  of  the  Merger,   Orion  will  have
                              limited  operations,  and  subsidiaries  of Orion,
                              particularly  Orion  Atlantic (as defined  below),
                              will be the principal  operating  companies within
                              the  consolidated  group.  The  structure of Orion
                              Newco after the Merger  Transactions  is set forth
                              below under the caption "The Merger,  the Exchange
                              and  the   Debenture   Investments   --  Corporate
                              Structure After the Transactions."

THE EXCHANGE

The Exchange Agreemen.......  The Section  351  Exchange  Agreement  and Plan of
                              Conversion (the "Exchange Agreement"), dated as of
                              June  1996,   as  amended,   among  Orion,   Orion
                              Satellite  Corporation,   a  Delaware  corporation
                              ("OrionSat")  that is a wholly owned subsidiary of
                              Orion   and   the   sole   general    partner   of
                              International Private Satellite Partners,  L.P., a
                              Delaware limited  partnership  ("Orion Atlantic"),
                              and each of the existing limited partners of Orion
                              Atlantic   other  than   Orion  (the   "Exchanging
                              Partners").  See "The Merger, the Exchange and the
                              Debenture Investments."

Parties to the Exchange.....  The  parties  to the  Exchange  are  Orion,  Orion
                              Newco, OrionSat and Orion Atlantic  (collectively,
                              the "Orion parties") and the Exchanging  Partners.
                              See "The Merger,  the  Exchange and the  Debenture
                              Investments -- The Exchange Agreement -- Parties."

                                       9

<PAGE>


Structure of the Exchange...  Pursuant  to the  Exchange  Agreement,  Orion  has
                              agreed,  among other  things,  to have Orion Newco
                              issue  shares of Orion  Newco  Series C  Preferred
                              Stock  for  the   Exchanging   Partners'   limited
                              partnership  interests in Orion Atlantic and other
                              rights relating thereto. In addition,  Orion Newco
                              will acquire certain rights  currently held by the
                              Exchanging  Partners,   including  the  Exchanging
                              Partners'  rights to receive  repayment of various
                              advances  made  to  Orion   Atlantic   aggregating
                              approximately $37.5 million at September 30, 1996.
                              As a result  of the  Exchange,  Orion  Newco  will
                              become the owner of all the partnership  interests
                              in Orion  Atlantic  (through Orion Newco and Orion
                              as the sole  limited  partners and OrionSat as the
                              sole  general  partner  of  Orion  Atlantic).  The
                              approximately 121,988 shares of Orion Newco Series
                              C  Preferred  Stock  expected  to be issued in the
                              Exchange  will be  convertible  as of the issuance
                              date into approximately  6,970,740 shares of Orion
                              Newco Common Stock,  or  approximately  27% of the
                              shares of Orion Newco Common Stock  outstanding on
                              a fully diluted  basis,  assuming a closing of the
                              Merger Transactions as of January 30, 1997. If the
                              Merger  Transactions close after January 30, 1997,
                              Orion Newco will be obligated to make certain cash
                              refunds  of  payments   made  by  the   Exchanging
                              Partners after that date under various agreements;
                              if Orion  Newco does not have  sufficient  cash to
                              make such  refunds,  the  refunds  will be made in
                              shares of Orion Newco  Series C  Preferred  Stock,
                              and the  number of shares  issued in the  Exchange
                              will  increase.  As  a  result  of  the  Exchange,
                              certain  of  the   Exchanging   Partners  will  be
                              principal   stockholders  of  Orion  Newco.  Orion
                              Atlantic will remain in existence and maintain its
                              status as a partnership,  with Orion Newco,  Orion
                              and OrionSat (a wholly owned  subsidiary of Orion)
                              as its  partners.  The  structure  of Orion  Newco
                              after the  Transactions  is set forth  below under
                              the caption  "The  Merger,  the  Exchange  and the
                              Debenture Investments -- Corporate Structure After
                              the Transactions."

Orion Newco Series C 
  Preferred Stock...........  Dividends.  Subject to the preferential  rights of
                              the Orion Newco Series A Preferred Stock and Orion
                              Newco Series B Preferred Stock, the record holders
                              of  Orion  Newco  Series  C  Preferred  Stock  are
                              entitled  to receive  dividends  at the rate of 6%
                              per  annum,  payable  exclusively  (except  in the
                              event  of a  liquidation)  in Orion  Newco  Common
                              Stock.  The number of shares of Orion Newco Common
                              Stock distributable as a dividend on each share of
                              Orion Newco Series C Preferred Stock is calculated
                              based on the  market  price of such  common  stock
                              under a formula  set forth in the  Certificate  of
                              Designations   for  the  Orion   Newco   Series  C
                              Preferred     Stock    (the     "Certificate    of
                              Designations").

                                       10

<PAGE>

                              Liquidation.  Each share of Orion  Newco  Series C
                              Preferred  Stock has a  liquidation  preference of
                              $1,000  per share  (plus all  accrued  and  unpaid
                              dividends)  over the Orion Newco  Common Stock and
                              any  series,  class or  classes  of stock  ranking
                              junior  to the  Orion  Newco  Series  C  Preferred
                              Stock.  

                              Voting  Rights.  The  holders  of the Orion  Newco
                              Series C Preferred  Stock will be entitled to vote
                              on all matters  submitted to the  stockholders  of
                              Orion Newco for a vote  together  with the holders
                              of Orion Newco Common Stock,  Orion Newco Series A
                              Preferred Stock and Orion Newco Series B Preferred
                              Stock,  voting  together as a single  class.  Each
                              share of Orion Newco Common Stock will be entitled
                              to one vote  per  share  and  each  share of Orion
                              Newco  Senior  Preferred  Stock  and  Orion  Newco
                              Series C  Preferred  Stock  (including  fractional
                              shares)  will be  entitled  to one  vote  for each
                              whole share of Orion Newco Common Stock that would
                              be issuable upon conversion of such share of Orion
                              Newco  Senior  Preferred  Stock  and  Orion  Newco
                              Series C  Preferred  Stock,  respectively,  at the
                              time the vote is taken.

                              Conversion.  The Orion  Newco  Series C  Preferred
                              Stock  is  convertible  into  Orion  Newco  Common
                              Stock,  at the option of the  holder,  at any time
                              after issuance,  at a conversion  price of $17.50,
                              subject to adjustment. Orion Newco may require, by
                              written  notice  to all  holders  of  Orion  Newco
                              Series C Preferred Stock, the mandatory conversion
                              of all of the  outstanding  Orion  Newco  Series C
                              Preferred  Stock into Orion Newco  Common Stock if
                              the closing  price of the Orion Newco Common Stock
                              over 20 of the 30 prior  trading  days is  greater
                              than or equal to the  conversion  price of $17.50,
                              subject to  adjustment.  In each case, all accrued
                              and unpaid  dividends  are payable (in Orion Newco
                              Common  Stock) upon  conversion.  In the case of a
                              mandatory  conversion  within  two years  from the
                              initial date of issuance of the Orion Newco Series
                              C Preferred  Stock,  the number of shares of Orion
                              Newco  Common Stock into which the shares of Orion
                              Newco Series C Preferred  Stock are converted will
                              be  increased  by the  number  of  shares of Orion
                              Newco  Common Stock that would be payable if Orion
                              Newco  were  immediately  to  declare  and pay all
                              dividends that in the absence of conversion  would
                              have  accrued on such shares of Orion Newco Series
                              C  Preferred  Stock  over  the  six-month   period
                              immediately  following the date of such  mandatory
                              conversion;  provided,  however,  that  the  total
                              dividends,  including  any  additional  amounts in
                              respect  of  dividends  paid  as  a  result  of  a
                              mandatory  conversion,  will not be less  than the
                              amount of dividends that would have accrued on all
                              outstanding  shares  of the Orion  Newco  Series C
                              Preferred  Stock for one full year  following  the
                              date of issuance.

                                11

<PAGE>


                              Redemption. Orion Newco will be required to redeem
                              all of the Orion Newco Series C Preferred Stock on
                              the 25th anniversary of issuance (2022). The Orion
                              Newco Series C Preferred Stock also is redeemable,
                              in whole or in part, at the option of Orion Newco,
                              at any  time  after  the  earlier  of  the  second
                              anniversary  of the  issuance  of the Orion  Newco
                              Series C Preferred Stock, or the effective date of
                              a  Reorganization  (as  such  term  is used in the
                              Certificate  of  Designations)  for  an  aggregate
                              redemption  price of $1,000  per  share  (plus all
                              accrued and unpaid  dividends  thereon).  

                              See "The Merger,  the  Exchange and the  Debenture
                              Investments  --  Description  of the  Orion  Newco
                              Series C Preferred Stock."

Conditions to Closing.......  Orion and the Exchanging Partners.  The closing of
                              the Exchange  Agreement is conditioned upon, among
                              other things,  the satisfaction or waiver by Orion
                              and  the  Exchanging  Partners  of  the  following
                              conditions: (i) completion of a refinancing of the
                              indebtedness of Orion Atlantic  outstanding  under
                              the Orion 1 Credit Facility,  (ii) the termination
                              of all  agreements  between or among the Banks and
                              Chase,  on the one hand,  and one or more of Orion
                              Newco,  Orion  Atlantic,  OrionSat,  Orion and the
                              Exchanging Partners and/or their affiliates on the
                              other  hand,   relating  to  the  Orion  1  Credit
                              Facility or the security or credit support thereof
                              (the  "Bank  Agreement  Termination"),  (iii)  the
                              termination of all  obligations  under the Orion 1
                              Credit   Facility   Support,   (iv)   the   Option
                              Agreement,  dated December 10, 1996, between Orion
                              Atlantic  and Matra  Marconi  Space  being in full
                              force  and  effect,  Orion  Atlantic  not being in
                              default  thereunder and Orion Atlantic having made
                              all  payments   required  to  be  made  thereunder
                              through  the  earlier of the  closing  date of the
                              Exchange  and March  31,  1997,  and the  Restated
                              Amendment  #10,  dated  December 10, 1996,  to the
                              Orion 1 Satellite  Contract  (as  defined  below),
                              being in full force and effect, and Orion Atlantic
                              not being in default thereunder, (v) the formation
                              of   Orion   Newco   with   a    certificate    of
                              incorporation,   bylaws,   capital  structure  and
                              management substantially identical in all material
                              respects to those of Orion,  (vi)  procurement  of
                              consents   needed   for   the   Exchange,    (vii)
                              consummation   of   the   Merger   prior   to   or
                              concurrently  with the Exchange and (viii) receipt
                              by the  Exchanging  Partners  of an  opinion  from
                              Ernst & Young LLP,  tax  advisor to Orion,  to the
                              effect  that the  Merger and the  Exchange,  taken
                              together, will be a tax-free exchange described in
                              Code  Section  351(a).  

                              Lockheed  Martin CLS.  The closing of the Exchange
                              Agreement is conditioned  upon the satisfaction or
                              waiver by  Lockheed  Martin  CLS of the  condition
                              that  Lockheed  Martin CLS and Matra Marconi Space
                              enter into a subcontract  to the Orion 2 Satellite
                              Contract relating to the launch of Orion 2.

                              Orion   Parties.   The  closing  of  the  Exchange
                              Agreement is conditioned  upon the satisfaction or
                              waiver  by the  Orion  parties  of  the  following
                              conditions: (i) the ratification or approval by


                                       12

<PAGE>
                              Orion  stockholders  of the  Merger  Transactions,
                              (ii) the amendment and  restatement  of the Second
                              Amended  and  Restated  Partnership  Agreement  of
                              Orion Atlantic (the  "Partnership  Agreement") and
                              (iii) receipt by Orion Newco of approximately  $60
                              million from the Debenture  Investments.  See "The
                              Merger, the Exchange and the Debenture Investments
                              -- The  Exchange  Agreement --  Conditions  to the
                              Exchange."  

                              Satisfaction   of  Conditions.   It  is  presently
                              anticipated  that  each of the  conditions  to the
                              Exchange  would have to be satisfied to consummate
                              the  Exchange  (and  therefore  the  Merger).  The
                              Exchanging  Partners are not expected to waive any
                              of  the   conditions  to  their   obligations   to
                              consummate the Exchange,  and the Orion parties do
                              not intend to waive any of the conditions to their
                              obligations to consummate the Exchange.

Accounting Treatment........  The  Exchange   will  be   accounted   for  as  an
                              acquisition   of  minority   interest   using  the
                              purchase  method of accounting.  As a result,  the
                              assets and  liabilities  of Orion Atlantic will be
                              revalued  to  fair  value  to  the  extent  of the
                              Limited Partners'  interests  acquired as a result
                              of the Exchange.

Representations, Warranties,
  Covenants and 
  Indemnification...........  Orion and  OrionSat  have  agreed  (and  Orion has
                              agreed to bind Orion Newco  pursuant to a separate
                              indemnity  agreement) to indemnify the  Exchanging
                              Partners  for  certain  losses  arising out of any
                              claims relating to the Exchange Agreement, subject
                              to certain exceptions, limitations and conditions.
                              See "The Merger,  the  Exchange and the  Debenture
                              Investments  -- The Exchange  Agreement -- Certain
                              Provisions of the Exchange Agreement."

Registration Rights.........  The  Exchanging  Partners will be granted  certain
                              shelf, demand and "piggyback"  registration rights
                              with respect to the Orion Newco Series C Preferred
                              Stock to be received by them in the  Exchange  and
                              the Orion Newco Common Stock issuable as dividends
                              thereon or upon the conversion  thereof.  See "The
                              Merger, the Exchange and the Debenture Investments
                              -- Registration Rights."

Transfer Restrictions.......  Each of the  Exchanging  Partners  will agree in a
                              Transfer   Restriction   Agreement,   among  other
                              things,  that it will not  transfer  any shares of
                              Orion Newco Common Stock issued upon conversion of
                              shares of Orion Newco Series C Preferred  Stock or
                              as  dividends  on Orion  Newco  Series C Preferred
                              Stock (the  "Affected  Shares") for 180 days after
                              the issuance of the Orion Newco Series C Preferred
                              Stock without the prior  written  consent of Orion
                              Newco,  unless such a transfer is to an  affiliate
                              or does  not  involve  a  public  distribution  or
                              public offering or occurs as the result of certain
                              events  set  forth  in  the  Transfer  Restriction
                              Agreement,  and is  conducted  as  provided in the
                              Transfer Restriction Agreement.  Also, each of the
                              Exchanging  Partners  will  agree,  pursuant  to a
                              Transfer  Restriction  Agreement,  not to transfer
                              during any 90-day period Affected Shares

                                       13

<PAGE>


                              that  collectively  represent more than 25% of the
                              aggregate  number of shares of Orion Newco  Common
                              Stock  issuable  upon the  conversion of the Orion
                              Newco  Series C Preferred  Stock  received by such
                              Exchanging   Partner   pursuant  to  the  Exchange
                              Agreement  or as  dividends  on  the  Orion  Newco
                              Series C  Preferred  Stock,  except as provided in
                              the  Transfer  Restriction  Agreement.   See  "The
                              Merger, the Exchange and the Debenture Investments
                              -- Certain Transfer Restrictions."

 Closing After January 30, 
  1997.                       If the  Exchange  closes  after  January 30, 1997,
                              Orion  Newco  will  be   obligated  to  make  cash
                              refunds,  on or shortly after the closing date, of
                              payments  made by the  Exchanging  Partners  after
                              that  date  under  the  Orion  1  Credit  Facility
                              Support;  if Orion Newco does not have  sufficient
                              cash to make such  refunds,  the  refunds  will be
                              made in shares of Orion  Newco  Series C Preferred
                              Stock,  and the  number  of  shares  issued in the
                              Exchange will  increase.  If the Notes Offering is
                              as large or larger than that presently anticipated
                              by  the  Company,   all   payments   made  by  the
                              Exchanging  Partners  after January 30, 1997 under
                              the  Orion  1  Credit  Facility  Support  will  be
                              refunded  in cash and the number of shares  issued
                              in  the  Exchange  will  not  increase.  See  "The
                              Merger, the Exchange and the Debenture Investments
                              -- The Exchange Agreement -- Closing After January
                              30, 1997."

REASONS FOR THE MERGER 
TRANSACTIONS AND THE 
DEBENTURE INVESTMENTS

Principal Reasons for
Transactions................  Orion's   principal   objective   for  the  Merger
                              Transactions is to simplify Orion's organizational
                              structure  and  improve  its access to the capital
                              markets.    Orion   believes   that   the   Merger
                              Transactions  will  enable it to: (i)  consolidate
                              outside  investor  ownership  at the  Orion  Newco
                              level,  (ii) improve the speed and  efficiency  of
                              its decision  making,  (iii)  provide  Orion Newco
                              with  100%   ownership  of  all  of  its  material
                              subsidiaries,  (iv)  allow  Orion  Newco to pursue
                              independently  its business  plans and  financings
                              for  all  of its  satellites,  (v)  eliminate  (in
                              exchange  for  Orion  Newco  stock)  approximately
                              $37.5 million of  obligations  Orion Atlantic owes
                              to  the  Exchanging  Partners  and  (vi)  increase
                              Orion's  overall  market  capitalization.  

                              Orion's  principal  reason for the issuance of $50
                              million of Debentures  to British  Aerospace is to
                              raise additional capital for initial payments with
                              respect  to  the  Orion  2  satellite,   of  which
                              approximately  $49.4  million of payments  are due
                              during 1997. The sale of $10 million of Debentures
                              to   Matra    Marconi   Space   will   involve   a
                              re-investment   by  Matra  Marconi  Space  of  $10
                              million of the $13 million of satellite  incentive
                              payments  Matra  Marconi Space will receive as the
                              manufacturer   of  the  Orion  1  satellite   upon
                              consummation   of   the   Notes   Offering.    The
                              consummation  of the  Debenture  Investments  is a
                              condition to the Exchange.

                                       14

<PAGE>


Related Transactions........  Access to the  capital  markets is  necessary  for
                              Orion to achieve its  business  plan to  construct
                              and  launch  two  additional  satellites,  Orion 2
                              (with  coverage  of Europe,  Russia,  the  eastern
                              United States and Latin America) and Orion 3 (with
                              coverage of the Asia  Pacific  region).  With this
                              plan in mind,  Orion  and  Orion  Newco  have been
                              pursuing and will continue to pursue the following
                              transactions:  

                              (i) Notes  Offering:  (i) a Notes  Offering in the
                              amount of approximately $347 million with expected
                              gross  proceeds  of  approximately  $275  million,
                              excluding approximately $72 million of overfunding
                              of  interest  due on  such  notes.  The  principal
                              purpose of the Notes  Offering is to refinance the
                              indebtedness of Orion Atlantic  outstanding  under
                              the  Orion  1  Credit  Facility  and  release  the
                              existing  commitments of the Limited  Partners and
                              their affiliates under the Orion 1 Credit Facility
                              Support.  Such  release  is  a  condition  to  the
                              Exchange.  

                              (ii) Orion 2  Construction  Contract:  the Orion 2
                              Satellite  Contract,  under which the manufacturer
                              is to proceed with construction based upon initial
                              payments  of  $25  million  and  further  payments
                              through December 1997 limited to approximately $25
                              million.    Orion    expects   to   commence   the
                              construction  of  Orion  2  immediately  following
                              completion  of the Notes  Offering.  

                              (iii) Orion 3 Construction  Contract:  the Orion 3
                              Satellite  Contract,  under which the manufacturer
                              is to proceed with construction based upon initial
                              payments  through  January  31,  1997  aggregating
                              approximately  $15 million,  with further payments
                              through  March  31,  1998  being  limited  to  $35
                              million,  payable in approximately equal quarterly
                              installments.  The  majority  of the  amounts  due
                              under the  contract  are payable in the second and
                              third   quarters   of   1998.    Orion   commenced
                              construction of Orion 3 in mid-December 1996 under
                              an authorization to proceed,  and expects to enter
                              into a  definitive  satellite  contract in January
                              1997.

                              In addition to the Merger,  the Notes Offering and
                              the   Debenture   Investments,   the  Exchange  is
                              indirectly conditioned on, among other things, the
                              acquisition  by  Orion  of  the  only  outstanding
                              minority  interest  in  Orion  Asia  Pacific  from
                              British Aerospace for approximately  86,000 shares
                              of Orion Newco Common Stock, which has occurred or
                              is in the  process  of  occurring.  The pro  forma
                              financial   information  included  in  this  Proxy
                              Statement/Prospectus  gives  effect to the Merger,
                              the Exchange and the Debenture Investments and the
                              transactions   on  which  they  are   conditioned,
                              including the Notes Offering, the OAP Acquisition,
                              the  application  of the net proceeds of the Notes
                              Offering to effect the Orion 1 Credit  Refinancing
                              and  repayment  of amounts  owed to STET, a former
                              Limited  Partner,  and the use of the  proceeds of
                              the Debenture Investments to make initial payments
                              on Orion 2 (initial  payments on Orion 3 are to be
                              made from cash on hand).  See "Pro Forma Condensed
                              Consolidated  Financial  Statements," "The Merger,
                              the  Exchange  and the  Debenture  Investments  --
                              Reasons for

                                       15

<PAGE>
                              the   Merger   Transactions   and  the   Debenture
                              Investments" and "The Related  Transactions." 

                              Each  proposal  to be  considered  at the  Special
                              Meeting will be voted upon separately by the Orion
                              stockholders.   However,   failure  by  the  Orion
                              stockholders  to approve  the  Exchange  Agreement
                              will result in termination of the Merger Agreement
                              by Orion, Orion Newco and Orion Merger Subsidiary.
                              The Merger is a condition  to the  Exchange and is
                              being proposed to enable the Exchange to occur. If
                              the  Merger  were  to  cease  to be  necessary  to
                              consummate the Exchange  (which is not expected to
                              occur),  the Board of Directors  would cause Orion
                              to proceed  with the  Exchange but not the Merger.
                              In such  event,  Orion  (instead  of Orion  Newco)
                              would  issue  shares  of  Series  C 6%  Cumulative
                              Redeemable  Convertible  Preferred  Stock  for the
                              Exchanging Partners' limited partnership interests
                              in  Orion  Atlantic  and  other  rights   relating
                              thereto and Orion  (instead of Orion  Newco) would
                              issue the  Debentures,  but all other  aspects  of
                              these  transactions  would remain the same.  Since
                              the rights of  stockholders of Orion Newco will be
                              substantially   the   same   as  the   rights   of
                              stockholders   of  Orion,   Orion   believes  that
                              consummation  of the Exchange  would have the same
                              effect on  stockholders  whether or not the Merger
                              occurs. The Merger and the Exchange are conditions
                              to the Debenture Investments, and waivers of these
                              conditions are not expected to occur. Repayment of
                              the Orion 1 Credit  Facility is a condition to the
                              Exchange and the Debenture  Investments,  and this
                              condition is not expected to be waived.

SPECIAL MEETING

Date, Time, Place of          
  Meeting...................  The  Special  Meeting  will be  held on  Thursday,
                              January 30, 1997 at 9:00 a.m., local time, at 2440
                              Research   Boulevard,    Suite   400,   Rockville,
                              Maryland.                                         

Record Date.................  Only Orion  stockholders of record at the close of
                              business on December 23, 1996 (the "Record  Date")
                              are  entitled  to  notice  of and to  vote  at the
                              Special Meeting or any adjournment thereof, unless
                              a new  record  date is  fixed  for  any  adjourned
                              meeting. See "The Special Meeting -- Voting Rights
                              and Related Matters."

Purpose of the Special 
  Meeting...................  At the Special Meeting, Orion stockholders will be
                              asked to consider  and vote upon (i)  ratification
                              of  the  Merger  Agreement  and  the  transactions
                              contemplated  thereby,  (ii) approval and adoption
                              of the  Exchange  Agreement  and the  transactions
                              contemplated  thereby  and (iii)  approval  of the
                              Debenture Investments. See "The Special Meeting --
                              Voting Rights and Related Matters."

                                       16

<PAGE>
Quorum......................  The  holders  of a  majority  of the  votes of the
                              shares  of  Orion   capital   stock   issued   and
                              outstanding  and  entitled  to  vote,  present  in
                              person  or  represented  by  proxy,  treated  as a
                              single  class,  will be required to  constitute  a
                              quorum at the Special  Meeting.  See "The  Special
                              Meeting -- Voting Rights and Related Matters."

Votes Required..............  The  affirmative  vote of holders of a majority of
                              the  votes of the  shares of Orion  capital  stock
                              that are  entitled to vote and that are present in
                              person  or  represented  by proxy  at the  Special
                              Meeting,  treated  as  a  single  class,  will  be
                              required to approve each proposal to be considered
                              at the Special Meeting. Orion anticipates that all
                              members of the Board of  Directors  and  companies
                              they   represent  (who  held,  in  the  aggregate,
                              approximately  38% of Orion's  voting  stock as of
                              September   30,  1996)  will  enter  into  written
                              agreements  to vote for each such  proposal.  Each
                              share of Orion  Common  Stock will be  entitled to
                              one vote per share, and each share of Orion Series
                              A  Preferred  Stock and Orion  Series B  Preferred
                              Stock  (including   fractional   shares)  will  be
                              entitled to one vote for each whole share of Orion
                              Common   Stock   that  would  be   issuable   upon
                              conversion   of  such  share  of  Orion  Series  A
                              Preferred  Stock  and  Orion  Series  B  Preferred
                              Stock,  respectively.  See "The Special Meeting --
                              Voting  Rights and Related  Matters" and "-- Votes
                              Required."

Dissenters' Rights..........  Orion  stockholders have no dissenters'  rights in
                              connection with the matters submitted by Orion for
                              stockholder   ratification   or  approval  at  the
                              Special  Meeting.  See "The Special  Meeting -- No
                              Dissenters' Rights."

Revocability of Proxies.....  An  Orion  stockholder  giving a proxy in the form
                              accompanying this Proxy  Statement/Prospectus  has
                              the  power  to  revoke  the  proxy  prior  to  its
                              exercise.   A  proxy   may  be   revoked   by  any
                              stockholder  who attends  the Special  Meeting and
                              gives  notice of the  stockholder's  intention  to
                              vote in person,  without compliance with any other
                              formalities.  In addition,  any Orion  stockholder
                              may revoke a proxy at any time  before it is voted
                              by executing and delivering a later dated proxy or
                              by delivering a written notice to the Secretary of
                              Orion stating that the proxy is revoked.  See "The
                              Special Meeting -- Proxies."

BOARD RECOMMENDATION........  The Board of Directors  has  unanimously  approved
                              (with the British  Aerospace Board  representative
                              recusing   himself)   the  terms  of  the   Merger
                              Agreement,   the   Exchange   Agreement   and  the
                              Debenture   Agreement  and  determined   that  the
                              Merger, the Exchange and the Debenture Investments
                              are  in  the  best   interest  of  Orion  and  its
                              stockholders.  The  Board  recommends  unanimously
                              (with the British  Aerospace Board  representative
                              recusing   himself)  that  stockholders  vote  FOR
                              ratification  of  the  Merger  Agreement  and  the
                              transactions  contemplated  thereby,  FOR approval
                              and  adoption of the  Exchange  Agreement  and the
                              transactions   contemplated   thereby,   and   FOR
                              approval of the Debenture Investments.

                                       17

<PAGE>
               SUMMARY CONSOLIDATED FINANCIAL AND OPERATIONAL DATA

   The following table sets forth summary consolidated financial and operational
data of the Company as of and for the years ended December 31, 1994 and 1995 and
for the nine months ended  September 30, 1995 and 1996.  The data should be read
in conjunction with "Management's Discussion and Analysis of Financial Condition
and  Results of  Operations  of  Orion,"  the Pro Forma  Condensed  Consolidated
Financial  Statements and the Consolidated  Financial  Statements of the Company
and the related notes included elsewhere in this Proxy Statement/Prospectus. The
summary consolidated financial data under the captions "Consolidated  Statements
of  Operations  Data" for the years ended  December 31, 1994 and 1995,  with the
exception  of the Pro Forma data,  were  derived  from the audited  consolidated
financial statements of the Company. The summary consolidated  financial data as
of September  30, 1996,  and for the nine months  ended  September  30, 1995 and
1996,  with the exception of the Pro Forma data,  are derived from the Company's
unaudited  consolidated  financial  statements.  The  Pro  Forma  data  are  not
necessarily  indicative  of the results that would have been  achieved,  nor are
they indicative of the Company's future results. 

<TABLE>
<CAPTION>
                                                                                              NINE MONTHS
                                                 YEAR ENDED DECEMBER 31,                  ENDED SEPTEMBER 30,
                                         -------------------------------------- --------------------------------------
                                                         (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
                                                                      1995                                  1996 PRO
                                           1994         1995       PROFORMA(1)       1995        1996       FORMA(1)
                                        ----------- ----------- ---------------- ----------- ------------ ------------
<S>                                     <C>         <C>         <C>              <C>         <C>          <C>
Consolidated Statements of Operations
Data:
Revenues..............................  $    3,415  $   22,284  $   22,284       $   13,947  $    30,016  $    30,016
Interest expense......................          61      24,738      50,637           17,080       20,229       39,521
Net loss..............................      (7,965)    (26,915)   (103,156)         (19,985)     (19,807)     (67,263)
Net loss per common share.............  $    (0.86) $    (3.07) $   (12.01)      $    (2.42) $     (1.90) $     (6.46)
Shares used in calculating per share
data (2)..............................   9,272,166   9,103,505   9,376,719        8,522,067   10,943,287   11,544,626
                                        ----------- ----------- ---------------- ----------- ------------ ------------
Ratio of earnings to fixed charges
(3)...................................          --          --          --               --           --            --
Other Operating Data:
Number of customers...................          34         109                           79          167
Capital expenditures..................  $   51,103  $    9,060                   $    3,863  $    10,266
Customer contract backlog (4).........  $   39,122  $  120,612                   $   94,890  $   134,320  $   123,000
Points of service (5).................          57         151                          124          304
EBITDA (6)............................  $  (14,014) $  (15,427)                  $  (15,177) $       134
</TABLE>
                                         AS OF SEPTEMBER 30,
                                                1996
                                       ----------------------
                                                      PRO
                                         ACTUAL    FORMA(1)
                                       --------- ------------
Consolidated Balance Sheet Data:
Cash and cash equivalents............  $ 36,657  $122,339
Restricted cash (7)..................        --    72,000
Total assets.........................   355,977   566,292
Long-term debt (less current
portion).............................   221,781   425,513
Limited Partners' interest in Orion
Atlantic (8).........................    19,961        --
Redeemable preferred stock...........    20,539   114,539
Total stockholders' equity...........     6,891       967
Book value per share.................       .63       .09
- ----------
(1)  Adjusted to reflect  the pro forma  effects of the  Transactions  (see "Pro
     Forma Condensed Consolidated Financial  Statements"),  assuming such events
     occurred,  in the case of  Consolidated  Statements of Operations  Data, on
     January 1, 1995 and, in the case of  Consolidated  Balance  Sheet Data,  on
     September 30, 1996.

(2)  Computed on the basis  described for net loss per common share in Note 2 to
     the Consolidated Financial Statements.

(3)  As required by GAAP, net loss is presented before preferred stock dividends
     and  accretion.  For the years ended 1994,  1995,  1995 (pro forma) and the
     nine months ended September 30, 1995, 1996 and 1996 (pro forma),  preferred
     stock dividends and accretion are $.6 million,  $1.3 million, $9.8 million,
     $1.0 million, $1.0 million and $7.3 million, respectively.

(4)  For purposes of the ratio of earnings to fixed charges, earnings consist of
     earnings from  continuing  operations,  plus fixed charges,  reduced by the
     amount of  unamortized  interest  capitalized.  Fixed  charges  consist  of
     interest on all indebtedness (including commitment fees and amortization of
     deferred  financing  costs) plus the portion of rent  expense  representing
     interest  (estimated to be one-third of such expense).  For the years ended
     December 31, 1994 and 1995,  and the nine months ended  September  30, 1995
     and 1996, earnings were inadequate to cover fixed charges by $35.2 million,
     $28.2  million,  $21.3 million and $19.8  million,  respectively.  On a pro
     forma basis assuming consummation of the Transactions, earnings

                                       18

<PAGE>


     would not have been sufficient to cover fixed charges by $105.4 million and
     $70.5  million  for the year ended  December  31,  1995 and the nine months
     ended  September  30, 1996,  respectively.  A 0.5%  increase in the assumed
     interest  rates on the Notes  would  result in pro  forma  deficiencies  of
     earnings to cover fixed  charges of  approximately  $107.1  million for the
     year ended  December  31, 1995 and $71.8  million for the nine months ended
     September 30, 1996.

(5)  Backlog  represents  future revenues under  contract.  See "Risk Factors --
     Risks Relating to Orion's Business -- Uncertainties Relating to Backlog."

(6)  Points of service  includes  installed  VSATs and  additional  transmission
     destinations (such as customer premises) that share a VSAT.

(7)  "EBITDA" represents  earnings before minority  interests,  interest income,
     interest expense,  other expense (income),  income taxes,  depreciation and
     amortization.  EBITDA is commonly  used in the  communications  industry to
     analyze  companies  on the basis of  operating  performance,  leverage  and
     liquidity.  EBITDA is not intended to  represent  cash flows for the period
     and  should  not  be  considered  as an  alternative  to  cash  flows  from
     operating,  investing or financing  activities  as determined in accordance
     with generally accepted  accounting  principles  ("GAAP").  EBITDA is not a
     measurement  under GAAP and may not be comparable to other similarly titled
     measures of other companies.  Other expense (income) includes gains on sale
     of equipment, less the write-off of costs relating to the 1995 Financing of
     $3.4 million in the fourth quarter of 1995.

(8)  Restricted cash represents the estimated $72 million that will be placed in
     escrow on the closing date of the Notes Offering to pre-fund the payment of
     the first six  scheduled  payments  of  interest  on the  Senior  Notes (as
     defined  below).  The actual amount to be placed in escrow and reflected as
     restricted  cash will depend on the interest  rates on the Senior Notes and
     market interest rates on government securities on such closing date.

(9)  Represents  amounts invested by Limited Partners (net of syndication  costs
     related to the  investments),  adjusted for such Limited Partners' share of
     net losses.  The interests of the Limited  Partners will be acquired by the
     Company in the Exchange.

                                       19

<PAGE>


                                 RISK FACTORS


   An investment in Orion Newco Common Stock  pursuant to the Merger  involves a
high degree of risk. In  evaluating  the Merger  Transactions  and the Debenture
Investments,  Orion stockholders should carefully consider the following factors
as  well  as  other  matters  discussed  in  this  Proxy   Statement/Prospectus.
Statements  contained  in  this  Proxy  Statement/Prospectus  regarding  Orion's
expectations  with  respect to Orion 2 and Orion 3, related  financings,  future
operations  and  other  information,  which  can be  identified  by  the  use of
forward-looking  terminology,  such as "may,"  "will,"  "expect,"  "anticipate,"
"estimate" or "continue" or the negative thereof or other variations  thereon or
comparable terminology,  are forward-looking  statements and depend on a variety
of  factors,  including  those  set  forth in this  Risk  Factors  section.  See
"Forward-Looking   Statements."  The  discussions  set  forth  below  constitute
cautionary  statements  identifying  important  factors  with  respect  to  such
forward-looking  statements,  including  certain risks and  uncertainties,  that
could  cause   actual   results  to  differ   materially   from  those  in  such
forward-looking statements.  There can be no assurance that Orion's expectations
regarding some or all of these matters will be fulfilled. 

         RISKS RELATING TO MERGER, EXCHANGE AND DEBENTURE INVESTMENTS


MERGER, EXCHANGE AND DEBENTURE INVESTMENTS DEPENDENT ON ORION 1 CREDIT
FACILITY REFINANCING

   The Merger,  the Exchange and the Debenture  Investments  are  conditioned on
consummation  of the Orion 1 Credit  Facility  Refinancing.  Although  Orion has
engaged in discussions with prospective  underwriters  with respect to the Notes
Offering  Orion  is  pursuing  to  effectuate   the  Orion  1  Credit   Facility
Refinancing,  there can be no assurance that such financing will be consummated.
Orion has been advised by prospective  underwriters that the Notes Offering will
be conditioned  on, among other things,  concurrent  completion of the Exchange,
repayment of the Orion 1 Credit Facility with proceeds of the Notes Offering and
consummation of the OAP Acquisition and the Debenture Investments.  There can be
no  assurance  that the  conditions  to  closing  the  Orion 1  Credit  Facility
Refinancing,  and  accordingly  of the Merger,  the Exchange  and the  Debenture
Investments, will be met.


CERTAIN TERMS OF NOTES OFFERING NOT YET DETERMINED


   Completion  of  the  Exchange  is  conditioned,   among  other  things,  upon
completion of the Notes  Offering.  Certain pricing and other terms of the Notes
Offering are not known at the present time, including,  without limitation,  the
size of the Notes  Offering,  the interest rate for the Notes and the amount and
terms of the Orion  Newco  Common  Stock  warrants  to be  included in the Notes
Offering, and there can be no assurance that the terms of such transactions will
be  favorable  to Orion.  In  addition,  Orion  will be  subject  to a number of
restrictions  and  limitations  imposed by the indentures  pursuant to which the
Notes will be issued (the "Notes Indentures"). The Notes Indentures are expected
to contain,  among other limitations,  covenants which will restrict the ability
of the Company and its subsidiaries to: incur  additional  indebtedness;  create
liens;   engage  in   sale-leaseback   transactions;   pay   dividends  or  make
distributions  in respect  of their  capital  stock;  make  investments  or make
certain other  restricted  payments;  sell assets;  create  restrictions  on the
ability of restricted subsidiaries to make certain payments; issue or sell stock
of  restricted  subsidiaries;  enter  into  transactions  with  stockholders  or
affiliates;  and consolidate,  merge or sell all or  substantially  all of their
assets.  However,  these  limitations  will be subject to a number of  important
qualifications and exceptions.


RISKS IN IMPLEMENTATION OF MERGER, EXCHANGE AND DEBENTURE INVESTMENTS

   In order to implement the Merger, the Exchange and the Debenture Investments,
Orion will need to organize Orion Newco to be substantially  identical to Orion,
transfer all matters  relating to Orion's capital  structure to Orion Newco, and
merge with a subsidiary of Orion Newco.  These  transactions may require receipt
of a number of approvals or waivers,  including waivers of rights of the holders
of the Orion Senior  Preferred Stock to have their shares  repurchased by Orion,
consents or waivers under various  contracts  that may make a merger by Orion an
event of default  and  consents to  assignment  of various  contracts  regarding
registration rights applicable to Orion capital stock and other matters. There

                                       20

<PAGE>


can be no assurance that Orion will obtain all necessary approvals or waivers to
implement the Merger, the Exchange and the Debenture  Investments,  or regarding
the effect of failure to obtain such approvals or waivers.

   It is presently anticipated that each of the conditions to the Exchange would
have to be satisfied to consummate  the Exchange  (and  therefore the Merger and
the Debenture  Investments).  The Exchanging  Partners are not expected to waive
any of the conditions to their  obligations to consummate the Exchange,  and the
Orion parties do not intend to waive any of the conditions to their  obligations
to consummate the Exchange,  including, without limitation,  conditions relating
to financing, procurement agreements or otherwise.

SUBSTANTIAL CHANGE IN OWNERSHIP OF STOCK


   The beneficial ownership of Orion's Common Stock will change substantially as
a result of the  Exchange  and the  Debenture  Investments.  The  Exchange  will
involve the issuance of Orion Newco Series C Preferred  Stock  convertible as of
the  issuance  date into  approximately  6,970,740  shares of Orion Newco Common
Stock,  or  approximately  27%  of  the  shares  of  Orion  Newco  Common  Stock
outstanding  on a  fully  diluted  basis,  assuming  a  closing  of  the  Merger
Transactions as of January 30, 1997. The Debenture  Investments will involve the
issuance of $60 million of Debentures  convertible  as of the issuance date into
approximately  4,285,714  shares of Orion Newco Common Stock,  or  approximately
16.6% of the shares of Orion Newco Common Stock  outstanding  on a fully diluted
basis,  assuming a closing of the Debenture  Investments as of January 30, 1997.
See  "The  Merger,  the  Exchange  and the  Debenture  Investments  --  Security
Ownership of Certain Beneficial Owners Prior to and Following the Transactions."
Although  the  Company  is not aware of any intent by the  Exchanging  Partners,
British  Aerospace or Matra Marconi Space to seek to control the  management and
affairs of the Company,  there can be no assurance that they will not seek to do
so. In  addition,  the increase in  outstanding  capital  stock could  adversely
affect  prevailing  market prices,  as discussed  below under the caption "Risks
Relating to Capital  Stock -- Potential  Adverse  Effect of Shares  Eligible for
Future Sale." 

RISKS RELATING TO HOLDING COMPANY STRUCTURE


   After the Merger  Transactions,  the Company will  conduct  almost all of its
operations  through its  subsidiaries.  Accordingly,  the primary  source of the
Company's cash will be dividends and other  distributions from its subsidiaries.
The subsidiaries'  ability to make  distributions to the Company will be subject
to their having  sufficient  funds from their operations  legally  available for
payment thereof which are not needed to fund their own  operations,  obligations
or business plans and which are not restricted by agreements  with the creditors
of these entities. If the Company's subsidiaries are unwilling or unable to make
distributions to the Company, the Company's growth may be inhibited. The Company
may not be able to obtain debt financing if it cannot compel the subsidiaries to
make distributions to service such debt financing or obtain upstream  guarantees
from its subsidiaries with respect to such financing. 

RISKS RELATING TO ORION NEWCO SERIES C PREFERRED STOCK AND DEBENTURES


   The Company  expects to issue $122  million in Orion Newco Series C Preferred
Stock (assuming a closing of the Merger Transactions as of January 30, 1997) and
$60 million of  Debentures.  Certain rights granted by Orion Newco to holders of
the Orion Newco  Series C Preferred  Stock and the  Debentures  could  adversely
affect  Orion Newco or the rights of holders of Orion  Newco  Common  Stock.  In
particular,  the  holders  of Orion  Newco  Series C  Preferred  Stock will have
dividend rights, a liquidation  preference,  rights to vote with the Orion Newco
Common Stock as a single class,  rights to mandatory  redemption  after 25 years
and earlier  redemption at the option of Orion Newco,  the right to convert such
shares into Orion Newco Common Stock and registration  rights, as described more
fully under the caption "The Merger, the Exchange and the Debenture  Investments
- --  Description  of the Orion Newco  Series C Preferred  Stock."  Holders of the
Debentures will have the right to convert the Debentures into Orion Newco Common
Stock at $14.00 per share (subject to downward adjustment in certain events) and
the right to receive  dividends in Orion Newco  Common  Stock which,  in certain
circumstances,  could be valued at a price which is lower than the market  price
of such stock at the date of such dividends.  See "The Merger,  the Exchange and
the Debenture Investments -- The Debenture Investments." 

                                       21

<PAGE>


                      RISKS RELATING TO ORION'S BUSINESS

LIMITED OPERATIONS; HISTORY OF LOSSES AND NEGATIVE EBITDA; EXPECTATION OF
FUTURE LOSSES


   From its inception in 1982 through  January 20, 1995,  when Orion 1 commenced
commercial operations, Orion was a development stage company. Accordingly, Orion
has limited experience operating its business.  Orion has experienced net losses
in each fiscal year since its inception,  including a net loss of  approximately
$26.9 million and negative  EBITDA of $15.4 million  during 1995, and a net loss
of $19.8 million during the nine months ended September 30, 1996. On a pro forma
basis, giving effect to the Transactions,  the Company would have had a net loss
of $103.2 million and $67.3 million for 1995 and the nine months ended September
30,  1996,  respectively.  The  increase  in net  loss on a pro  forma  basis is
associated  with the  depreciation  on the step up in the  basis of the  Orion 1
satellite and  amortization  of excess cost over fair value  resulting  from the
acquisition of the Limited  Partners'  partnership  interests in Orion Atlantic,
the net increase to interest  expense as a result of the  Transactions,  and the
elimination of minority  interest as a result of the Exchange.  See Notes to Pro
Forma  Condensed  Consolidated  Statements  of  Operations  for the  year  ended
December  31,  1995  and for the nine  months  ended  September  30,  1996.  The
implementation  of  Orion's  business  plan  regarding  Orion 2 and Orion 3 will
require substantial additional capital for the construction,  launch, insurance,
financing and start-up costs of those satellites. A substantial portion of these
costs may be financed  with  indebtedness,  which would  substantially  increase
interest costs.  The Company's  negative cash flow has been  substantial and net
losses and negative  cash flows (after  payments  for capital  expenditures  and
interest) are expected to increase over the next few years.

NEED FOR SUBSTANTIAL ADDITIONAL CAPITAL


   The Company  will need a  substantial  amount of capital  over the next three
years (and  possibly  thereafter)  to fund the costs of Orion 2 and Orion 3, the
purchase  of VSATs and other  capital  expenditures  and to make  various  other
payments,  such as  principal  and  interest  payments  with respect to the TT&C
Financing (as defined below), the Notes and any indebtedness incurred to finance
Orion 2 or Orion 3. The  Company's  cash flows will be  inadequate  to cover its
cash needs and the Company will seek financing from outside sources.  Sources of
additional capital may include public or private debt or equity financings.  The
Company is often involved in discussions  or  negotiations  with respect to such
potential  financings  and,  because  of  its  substantial  capital  needs,  may
consummate  any  such   financings  at  any  time.  The  Company  has  commenced
construction  of  Orion  3 and  intends  to  commence  construction  of  Orion 2
immediately after  consummation of the Notes Offering,  despite the fact that it
does not have any commitment  from any outside source to provide such financing.
If the Company is unable to obtain financing from outside sources in the amounts
and at the times needed,  it could forfeit  payments made on Orion 2 and Orion 3
and its rights to Orion 2 and Orion 3 under the Orion 2 Satellite  Contract  and
Orion 3 Satellite  Contract.  Such a  forfeiture  would have a material  adverse
effect on the Company's  ability to make payments on its indebtedness and on the
value of the Orion Newco Common Stock.

   Expected  payments  prior to launch under the Orion 2 Satellite  Contract and
Orion 3  Satellite  Contract  and for launch  insurance  for Orion 2 and Orion 3
aggregate approximately $500 million. Of this amount, $3 million was paid in the
fourth quarter of 1996, and Orion is required to make payments of  approximately
$90 million, $360 million and $50 million in 1997, 1998 and 1999,  respectively.
These  amounts  include  the  Company's  estimate  regarding  the cost of launch
insurance (but not in-orbit  insurance,  which the Company  presently  estimates
will cost approximately $5 million to $6 million per annum per satellite), which
estimate is based upon industry  figures but not upon discussions with potential
insurers or any commitment to provide  insurance.  The Company's actual payments
could be  substantially  higher  due to any change  orders  for the  satellites,
higher than expected insurance rates, delays and other factors. In addition, the
Company expects to expend approximately $22 million, $30 million and $34 million
on VSATs and other capital  expenditures in 1997,  1998 and 1999,  respectively.
However,  there can be no assurance that these amounts will not be substantially
higher.  The Company believes the costs of VSATs and other capital  expenditures
can be financed through capital leases or other secured financing  arrangements.
However,  the Company has not engaged in  material  discussions  with  potential


                                       22

<PAGE>
lenders and there can be no assurance that such  financing can be obtained.  The
Company  also  expects to incur an  aggregate  of  approximately  $40 million of
start-up losses and financing costs in connection with Orion 2 and Orion 3.

   Orion Newco's ability to raise public equity financing may be limited by the
registration rights it has granted to certain investors.  See "Risks Relating to
Capital  Stock  -Potential  Adverse  Effect of Shares  Eligible for Future Sale"
below.

   Under the Orion 1 Satellite  Contract,  the contractor is entitled to receive
incentive  payments  based  upon  the  performance  of Orion 1 in  orbit.  These
incentive payments could reach an aggregate of approximately $44 million through
2007,  if the  transponders  on Orion 1 continue to operate in  accordance  with
specification   during  that  period.  As  of  September  30,  1996,  Orion  had
obligations with a present value of approximately  $21.7 million with respect to
incentive  payments.   Orion  will  pay  $13  million  in  satellite  incentives
concurrently  with the closing of the Notes Offering,  of which $10 million will
be  re-invested  in Orion in the  Matra  Marconi  Investment.  Under the Orion 2
Satellite Contract, Orion is obligated to pay $25,000 per day that the satellite
is delivered prior to the scheduled delivery date.

   The  foregoing  estimates  do not  include  any  amounts  for other  possible
financing  requirements.  The  Company  may from time to time  enter  into joint
ventures and make acquisitions of complementary  businesses and is often engaged
in discussions or negotiations  with regard to such potential joint ventures and
acquisitions.  Such joint  ventures or  acquisitions  would need to be financed,
which would  increase the Company's need for  additional  capital.  In addition,
Orion intends to replace  Orion 1 at the end of its useful life  (expected to be
in October 2005). Such replacement likely will require  additional  financing if
the cash flow from Orion's  operations  is not  sufficient to fund a replacement
satellite. 

SUBSTANTIAL LEVERAGE; SECURED INDEBTEDNESS


   As of September 30, 1996, after giving pro forma effect to the  Transactions,
Orion would have had approximately $426 million of long-term  indebtedness,  and
will be highly leveraged. The accretion of original issue discount on the Senior
Discount  Notes  (as  defined  below)  will   substantially   increase   Orion's
liabilities. The Company also expects to incur substantial additional amounts of
indebtedness.  The Company will deposit  approximately  $72 million in escrow to
pre-fund  the first six  scheduled  payments of interest on the Senior Notes (as
defined below).  However,  the Company  ultimately will need to service the cash
interest  expense  on a  very  substantial  amount  of  indebtedness  with  cash
generated  by its  operations.  For 1995 and the  three  and nine  months  ended
September 30, 1996, the Company had EBITDA of $(15.4) million,  $1.7 million and
$0.1  million  and, on a pro forma  basis,  giving  effect to the  Transactions,
interest  costs of $50.6  million and $39.5 million for 1995 and the nine months
ended   September  30,  1996,   respectively.   Interest   costs  will  increase
substantially if, as expected,  the Company incurs additional  indebtedness,  as
described above under the caption "Need for Substantial Additional Capital." The
Company  does not have a revolving  credit  facility or other  source of readily
available capital.

   The level of the Company's  indebtedness could have important consequences to
the Company and its  stockholders,  including the following:  (i) the ability of
the  Company  to obtain  any  necessary  financing  in the  future  for  capital
expenditures,  working capital,  debt service requirements or other purposes may
be  limited;  (ii)  a  substantial  portion  of the  Company's  cash  flow  from
operations,  if any,  must be  dedicated  to the  payment  of  principal  of and
interest on its indebtedness and other obligations and will not be available for
use in the Company's  business;  (iii) the Company's level of indebtedness could
limit its  flexibility in planning for, or reacting to changes in, its business;
(iv) the Company  will be more highly  leveraged  than some of its  competitors,
which may place it at a competitive  disadvantage;  and (v) the  Company's  high
degree  of  indebtedness  will  make it more  vulnerable  to a  default  and the
consequences  thereof (such as bankruptcy workout) in the event of a downturn in
its business.  See "Management's  Discussion and Analysis of Financial Condition
and Results of Operations of Orion -- Liquidity and Capital Resources -- Current
Funding Requirements." 

RISKS OF SATELLITE LOSS OR REDUCED PERFORMANCE


   Satellite Loss or Reduced Performance.  Satellites are subject to significant
risks,  including launch failure,  damage that impairs  commercial  performance,
failure to achieve correct orbital  placement  during launch,  loss of fuel that
reduces satellite life, and satellite in-orbit risks.  Although Orion 1 has been

                                       23

<PAGE>
successfully  launched  and  is in  commercial  operation,  and  although  Orion
maintains  satellite in-orbit insurance on Orion 1, any loss in orbit or reduced
performance  of Orion 1 would  have a  material  adverse  effect  on  Orion.  In
addition,  no assurance  can be given that the launch of Orion 2 or Orion 3 will
be successful.  Although various sources of data permit  differing  conclusions,
Orion is aware of  sources  indicating  that the  historical  loss  rate for all
commercial geosynchronous satellite launches may be as high as 15%. Launch risks
vary based upon the launch  vehicle used.  The Delta III launcher to be used for
Orion 3 is new and has no significant launch history.  Even though the Delta III
is based upon earlier Delta launch  vehicles,  the new technology  used in Delta
III could affect its launch success rate.

   Orion may have to change launch vehicles if, for example, one of its selected
vehicles  experiences a launch failure with respect to another satellite.  Orion
intends to order  certain  long lead time parts in order to reduce the amount of
time needed to obtain one replacement satellite. However, an unsuccessful launch
of Orion 2 or Orion 3 would  involve a delay in revenues  for at least one year,
and perhaps  substantially  longer. Any loss or delay of revenue from any of the
Company's  satellites  would have a material  adverse  effect on its  ability to
service its indebtedness and the value of the Orion Newco Common Stock.

   In November 1995, one of Orion 1's components supporting nine transponders of
dedicated  capacity  serving  the  European  portion  of the  Orion 1  footprint
experienced  an anomaly  that  resulted  in a  temporary  service  interruption,
lasting  approximately  two hours.  Full service to all affected  customers  was
restored  using  redundant  equipment  on  the  satellite.   These  transponders
currently generate a majority of Orion's revenues.  Orion believes, based on the
data  received  to date by  Orion  from  its own  investigations  and  from  the
manufacturer,  and  based  upon  advice  from  Orion's  independent  engineering
consultant,  Telesat Canada, that because the redundant component is functioning
fully in accordance with  specifications  and the performance  record of similar
components is strong,  the anomalous behavior is unlikely to affect the expected
performance of the satellite over its useful life.  Furthermore,  there has been
no further effect on Orion's ability to provide services to customers.  However,
in the  event  that  the  currently  operating  component  fails,  Orion 1 would
experience a significant  loss of usable  capacity.  In such event,  while Orion
would be entitled to insurance  proceeds of approximately  $47 million and could
lease  replacement  capacity  and  function as a reseller  with  respect to such
capacity (at  substantially  reduced gross margins),  the loss of capacity would
have a material  adverse  effect on the  Company,  on its ability to service its
indebtedness  and the value of the Orion Newco Common  Stock.  See  "Information
About Orion's Business --  Implementation of the Orion Satellite System -- Orion
1." 

   At the time of Orion's 1 delivery  from its  manufacturer,  one of the six 36
MHz  transponders  covering the United  States was not  performing in accordance
with contract  specifications  based on then-available  data. To date, Orion has
not used such transponder to provide services under any commercial contract, and
there can be no  assurance  that such  transponder  will ever be used.  Although
Orion  settled  the  matter  with the  manufacturer  for a  one-time  refund  of
approximately  $2.75  million  and monthly  payments of $7,000,  there can be no
assurance that such payments  adequately  compensated Orion for the loss of such
transponder.

   Limited Insurance for Satellite Launch and Operation.  The in-orbit insurance
of Orion 1 and the launch and  in-orbit  insurance  for Orion 2 and Orion 3 will
not protect the Company against business interruption, loss or delay of revenues
and similar losses and may not fully reimburse the Company for its expenditures.
In  addition,  such  insurance  includes or can be  expected to include  certain
contract terms, exclusions,  deductibles and material change conditions that are
customary in the industry.  Accordingly,  an  unsuccessful  launch of Orion 2 or
Orion  3 or any  significant  loss of  performance  with  respect  to any of its
satellites  would have a material  adverse effect on Orion,  its ability to make
payments  on its  indebtedness  and the value of the Orion Newco  Common  Stock.
Although  Orion intends to procure  insurance for the  construction,  launch and
insurance  costs of Orion 2 and Orion 3, Orion has not obtained  any  commitment
from insurance  underwriters to provide launch insurance for Orion 2 or Orion 3.
There can be no  assurance  that such  insurance  will be  available or that the
price of such  insurance  or the terms and  exclusions  in the actual  insurance
policy will be favorable to the Company. A failure of one of the launch vehicles
selected by Orion prior to the launch of Orion 2 or Orion 3 could  substantially
increase the cost of launch insurance for Orion. See "Information  About Orion's
Business -- Insurance."


                                       24

<PAGE>
   Limited Life of Satellites. While Orion 1 is expected to have an orbital life
of approximately  10.7 years (through October 2005), and Orion 2 and Orion 3 are
expected  to  have  orbital  lives  of  approximately  13  years  and 15  years,
respectively,  there  can be no  assurance  as to the  actual  longevity  of the
satellites.  A number of factors will affect the useful life of each  satellite,
including the rate of fuel  consumption in achieving  correct orbital  placement
during  launch,  the  quality  of its  construction  and the  durability  of its
component  parts.   There  is  a  significant   possibility  that  one  or  more
transponders   on  a  satellite  may  cease  to  function  in  accordance   with
specifications  during its estimated  useful life and there is no assurance that
service could be restored through  redundant  transponders.  In addition,  while
Orion plans to replace each  satellite at the end of its useful life,  there can
be no assurance that the required  financing and  regulatory  approvals to do so
will be available.

LAUNCH OF ORION 2 AND ORION 3 SUBJECT TO SIGNIFICANT UNCERTAINTIES


   Cost Uncertainties.  Based on the current designs of and current construction
schedules  for  Orion 2 and  Orion 3, the  total  costs of Orion 2 and  Orion 3,
including construction,  launch, launch insurance,  financing costs and start-up
expenses,  are  presently  estimated to be  approximately  $265 million and $275
million, respectively.  These costs may increase as a result of changes that may
occur  during the  construction  of the  satellites  or if the cost of insurance
exceeds the Company's  expectations.  See "Information About Orion's Business --
Implementation  of the Orion  Satellite  System." There can be no assurance that
the actual costs of these  satellites will not be materially  greater than these
estimates. 

   Substantial  Financing  Requirements.  Completion of Orion 2 and Orion 3 will
require substantial  additional financing beyond the funds expected to be raised
in the Notes  Offering and the British  Aerospace  Investment.  Failure to raise
such financing  would have a material  adverse  effect on Orion,  its ability to
make payments on its indebtedness and the value of the Orion Newco Common Stock,
as  discussed  in more  detail  above under the  caption  "Need for  Substantial
Additional Capital."

   Timing  Uncertainties.  Orion presently plans to launch Orion 2 in the second
quarter of 1999 and plans to launch Orion 3 in the fourth quarter of 1998, based
upon the construction and launch schedules set forth in the satellite contracts.
To meet these  schedules,  Orion must raise the financing needed for payments to
the satellite manufacturers,  receive certain regulatory approvals, finalize the
satellite  designs  and  take  other  necessary  steps.   Failure  to  meet  the
construction and launch schedules could increase the cost of Orion 2 or Orion 3,
requiring additional  financing,  as described above under the caption "Need for
Substantial Additional Capital." Although the Orion 2 Satellite Contract and the
Orion 3 Satellite  Contract are  fixed-price  contracts  with firm schedules for
construction,  delivery and launch,  there can be no assurance that increases in
costs due to change  orders or delay  will not  occur.  See  "Information  About
Orion's Business -- Implementation of the Orion Satellite  System." There can be
no assurance that the launch of Orion 2 or Orion 3 will take place as scheduled.
Delays in launching  satellites are quite common, and a significant delay in the
delivery  or launch of Orion 2 or Orion 3 also  would  have a  material  adverse
effect on Orion's  marketing plan for such  satellites,  its ability to generate
revenue  and service its  indebtedness  and the value of the Orion Newco  Common
Stock.

   Risks of  Proceeding  With  Construction  Prior to Obtaining  all  Regulatory
Approvals for Orion 2 and Orion 3. Orion has commenced  construction  of Orion 3
and will  commence  construction  of Orion 2 prior to completion of the required
consultation with INTELSAT, receipt of final authority from the FCC (in the case
of Orion 2) and completion of the International  Telecommunication Union ("ITU")
coordination process. Failure to obtain one more necessary approvals in a timely
manner  would  likely  have  a  material  adverse  effect  on the  Company.  See
"Approvals Needed; Regulation of Industry" below. 

RISKS RELATING TO POTENTIAL LACK OF MARKET ACCEPTANCE AND DEMAND; GROUND
OPERATIONS


   Orion's  success  will depend in part on the  continued  growth in demand for
international  private network  services,  which to date have not been a primary
focus of satellite  companies,  and on Orion's  ability to market such  services
effectively.  Marketing will be critical to Orion's success.  However, Orion has
limited  experience in marketing,  having  commenced full commercial  operations
only in 1995.  Ori-


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<PAGE>
on's  marketing  program  until  recently  consisted  of direct  sales,  using a
U.S.-based sales force, and indirect sales channels,  including  Limited Partner
sales  representatives,  for sales in Europe.  During  1996,  certain of Orion's
indirect sales channels in Europe in 1996 did not meet  expectations,  and Orion
is seeking to supplement  its sales in Europe by  significantly  increasing  its
direct  sales  capabilities  in Europe,  particularly  with  respect to sales of
private network  services.  However,  there can be no assurance that this effort
will be successful.  Sales of Orion's  services  generally  involve a long-term,
complex  sales  process,  and new  contract  bookings  will vary from quarter to
quarter.  In addition,  as an early provider of  international  network services
using  VSATs,  Orion  is  subject  to  the  uncertainties  associated  with  the
development of new services, including uncertainties regarding customer interest
in and acceptance of higher data speed  communications,  the need to develop and
convince  customers  of the  attractiveness  of new  applications,  and customer
acceptance of the ability of Orion (as a new market entrant) to provide service.
In addition, Orion's operations will continue to depend significantly on Orion's
ability to provide ground  operations for private network  services using ground
operators throughout the footprint of Orion's satellites.  In the event that its
network of ground  operators is not  maintained and expanded or fails to perform
as expected, Orion's ability to offer private network services will be impaired.
See  "Information  About Orion's  Business -- Network  Operations;  Local Ground
Operators."

RISKS CONCERNING ABILITY TO MANAGE GROWTH


   The Company's future  performance  will depend,  in part, upon its ability to
manage its growth  effectively,  which will  require it to continue to implement
and improve its marketing,  operating,  financial and accounting  systems and to
expand, train and manage its employee base and manage its relationships with its
local  ground  operators.  For  example,  Orion is in the  process of seeking to
integrate  a  significant  number of newly hired  direct  sales  personnel,  and
expects the process to continue as it seeks to increase  its sales force  during
1997.  Furthermore,  the Company may from time to time enter into joint ventures
and acquire  complementary  businesses  and is often engaged in  discussions  or
negotiations with regard to such potential joint ventures and acquisitions. Such
joint  ventures and acquired  businesses  would need to be  integrated  with the
Company,  which  would  place an  additional  burden on the  Company's  internal
systems and its ability to manage its employees and its  relationships  with its
local ground operators. In addition, the Company's ability to attract new orders
is subject to  substantial  variations  from quarter to quarter.  If the Company
fails  either to expand in  accordance  with its plans or to manage  its  growth
effectively,  there could be a material adverse effect on its business,  growth,
financial  condition  and  results of  operations,  its  ability to service  its
indebtedness and the value of the Orion Newco Common Stock. 

POTENTIAL ADVERSE EFFECTS OF COMPETITION


   The  international  telecommunications  industry  is highly  competitive.  In
providing  international   telecommunications   services,  Orion  competes  with
established  satellite and other transmission  facilities  providers,  including
INTELSAT, EUTELSAT, PanAmSat and consortia of major telephone carriers operating
undersea  fiber  optic  cables.   In  addition,   Orion  competes  with  certain
established  telephone  carriers,  such as AT&T, MCI,  Sprint,  British Telecom,
Cable & Wireless, Deutsche Telekom, France Telecom and Kokusai Denshin Denwa, as
well as resellers of satellite  capacity,  such as Impsat,  in providing private
network  communications  services.  Many of these  competitors  have significant
competitive advantages,  including  long-standing customer relationships,  close
ties with regulatory  authorities,  control over  connections to local telephone
lines and the ability to  subsidize  competitive  services  with  revenues  from
services they provide as a dominant or monopoly  carrier,  and are substantially
larger  than  Orion  and  have  financial   resources,   experience,   marketing
capabilities and name recognition that are  substantially  greater than those of
Orion. The Company believes that competition in emerging  markets,  particularly
with  respect to private  network  services,  will  intensify  as  dominant  and
monopoly long distance  providers  adapt to a competitive  environment and large
carriers  increase their  presence in these  markets.  The Company also believes
that  competition  in more  developed  markets will  intensify as large carriers
consolidate,  enhance their international  alliances and increase their focus on
private network services.  For example,  the recently announced merger involving
MCI and British Telecom may substantially  increase the ability of the resulting
businesses to provide  trans-Atlantic  private network services.  

                                       26

<PAGE>
The ability of Orion to compete with these  organizations will depend in part on
Orion's  ability to price its services at a significant  discount to terrestrial
service providers,  its level of customer support and service, and the technical
advantages of its systems.

   The services  provided by the Company have been subject to decreasing  prices
over recent  years and this  pricing  pressure is expected to continue  (and may
accelerate) for the foreseeable  future.  Orion will need to increase its volume
of sales in order to compensate for such price  reductions.  Orion believes that
customers  will  increase  the data speeds in their  communications  networks to
support new applications, and that such upgrading of customer networks will lead
to  increased  revenues  that will  mitigate  the  effect  of price  reductions.
However,  there can be no assurance that this will occur.  In addition,  a large
portion of satellite capacity globally is currently used for video distribution.
As an increasing  portion of satellite  capacity is used for  providing  private
network  services,  prices for these  services may decline.  Compressed  digital
video ("CDV"), which substantially  increases transmission capacity per channel,
is beginning to be used for video  distribution.  As CDV becomes more prevalent,
the supply of effective video capacity could increase significantly, which could
result in lower prices.

   The Company is aware of a substantial  number of new  satellites  that are in
construction  or in the planning  stages.  Most of these  satellites  will cover
areas within the footprint of Orion 1 and/or the proposed  footprints of Orion 2
and Orion 3. As these new  satellites  (other than  replacement  satellites  not
significantly larger than the ones they replace) commence operations,  they will
substantially increase the capacity available for the provision of services that
compete with the Company's  services.  After a satellite  has been  successfully
delivered in orbit,  the variable cost of  transmitting  additional data via the
satellite is limited.  Accordingly,  absent a corresponding  increase in demand,
this new  capacity  can be expected to result in  significant  additional  price
reductions.  Continued price  reductions could have a material adverse effect on
Orion's ability to service its  indebtedness and on the value of the Orion Newco
Common Stock. See "Information About Orion's Business -- Competition." 

APPROVALS NEEDED; REGULATION OF INDUSTRY

   Telecommunications   Regulatory   Policy.   Orion  is  subject  to  the  U.S.
Communications  Act  of  1934,  as  amended  (the  "Communications   Act"),  and
regulation  by the FCC (and,  to a limited  extent,  by the U.S.  Department  of
Commerce) and by the national and local governments of other countries.  The FCC
regulates terms and conditions of communications services, including among other
things changes in control or assignment of licenses.  The business  prospects of
Orion  could be  adversely  affected by the  adoption  of new laws,  policies or
regulations,  or changes in the  interpretation or application of existing laws,
policies  or  regulations,  that modify the present  regulatory  environment  or
conditions of the licenses granted by the FCC to Orion.


   Additional  Regulatory  Approvals Needed. The launch and operation of Orion 2
and Orion 3 will require a number of additional regulatory approvals,  including
the  following:  (i)  approvals  of the FCC  (in the  case  of  Orion  2);  (ii)
completion of successful  consultations  with INTELSAT and, in the case of Orion
2, with EUTELSAT;  (iii)  satellite  "landing"  rights in countries that are not
INTELSAT  signatories or that require additional  approvals to provide satellite
or VSAT services;  and (iv) other regulatory approvals.  Obtaining the necessary
licenses and approvals  involves  significant  time and expense,  and receipt of
such   licenses  and  approvals   cannot  be  assured.   Although  the  FCC  has
conditionally  authorized  the  construction,  launch and  operation  of Orion 2
(subject to  completion  of an INTELSAT  consultation  and  required  showing of
ability to finance the  construction,  launch and  operation for one year of the
satellite,  which  requirements  generally  must  be  satisfied  for  final  FCC
authorization of all FCC satellite  licenses),  and Orion will apply for certain
other approvals for Orion 2 and Orion 3, the FCC  authorization  for Orion 2 has
not become final (since Orion has not yet satisfied the  conditions) and most of
the other requisite approvals have not yet been obtained. Failure to obtain such
approvals  would have a material  adverse  effect on Orion and on its ability to
service its  indebtedness  and the value of the Orion  Newco  Common  Stock.  In
addition, Orion is required to obtain approvals from numerous national and local
authorities  in the  ordinary  course of its  business in  connection  with most
arrangements  for the provision of services.  Within Orion 1's  footprint,  such
approvals  generally  have not been  difficult  for  Orion to obtain in a timely
manner, but the failure to obtain particular  approvals has

                                       27

<PAGE>


delayed,  and in the future may delay,  the provision of services by Orion.  The
Orion 1 license  from the FCC  expires in January  2005.  Although  Orion has no
reason  to  believe  that its  licenses  will not be  renewed  (or new  licenses
obtained) at the  expiration of the license  term,  there can be no assurance of
renewal.  In addition,  Orion will need to comply with the national laws of each
country in which itprovides  services.  Laws with respect to satellite  services
are currently unclear in certain jurisdictions,  particularly within the Orion 3
footprint.  In certain of these  jurisdictions,  satellite  services may only be
provided via domestic  satellites.  The Company  believes  that certain of these
restrictions  may change and that it can structure its operations to comply with
the remaining  restrictions.  However, there can be no assurance in this regard.
See "Information About Orion's Business -- Regulation."

   ITU Coordination  Process. An international  treaty to which the U.S. and the
Republic of the Marshall  Islands (through which the Company has applied for the
Orion 3 orbital slot) are parties requires ITU coordination of satellite orbital
slots.  Various  non-U.S.  governments or  telecommunications  authorities  have
commenced  coordination  procedures  pursuant to ITU  regulations  for  proposed
satellites  at  orbital  locations  and in  frequency  bands  that  are in close
proximity to those proposed for Orion 2 and Orion 3. Existing satellites and any
proposed  satellites  that  are  launched  prior  to  Orion  2 and  Orion 3 will
effectively  have priority  over Orion's  satellites.  Orion's  proposed use for
Orion 2 and Orion 3 conflicts  to some  extent  with the use or proposed  use of
certain  existing  or proposed  satellites.  While  Orion  believes  that it can
successfully  coordinate  the use of the orbital  locations and frequency  bands
proposed  for Orion 2 and Orion 3, there can be no assurance  that  coordination
will be achieved.  The Company has  commenced  construction  of Orion 3 and will
commence  construction  of Orion 2 promptly  following  completion  of the Notes
Offering, which will be prior to completion of ITU coordination. There can be no
assurance that ITU coordination will be completed.  In the event that successful
coordination  cannot be achieved,  Orion may have to modify the satellite design
for  Orion 2 or  Orion 3 in  order  to  minimize  the  extent  of any  potential
interference  with other proposed  satellites  using those orbital  locations or
frequency  bands.  Any such  modifications  could increase the cost or delay the
launch of the satellites (if significant  changes to the satellite are required)
and may result in limitations on the use of one or more  transponders on Orion 2
or Orion 3,  which  could  affect  the  amount  of  revenue  realized  from such
transponders. If interference occurs with satellites that are in close proximity
to Orion 2 or Orion 3, or with  satellites that are  subsequently  launched into
locations in close proximity before  completion of ITU coordination  procedures,
such  interference  would  have an  adverse  effect on the  proposed  use of the
satellites  and on Orion's  business  and  financial  performance.  Orion cannot
predict the extent of any adverse effect on Orion from any such occurrences. See
"Information About Orion's Business -- Orbital Slots." 

UNCERTAINTIES RELATING TO BACKLOG


   The Company's  current backlog consists of a mix of large and small contracts
for private  communications  networks  and  transmission  capacity for video and
other satellite transmission services with a variety of customers. Although many
of the  Company's  customers,  especially  customers  under large and  long-term
contracts,  are large corporations with substantial  financial resources,  other
contracts are with companies that may be subject to business or financial  risks
affecting their credit worthiness.  If customers are unable or unwilling to make
required  payments,  the Company  may be required to reduce its backlog  figures
(which would result in a reduction in future revenues of the Company),  and such
reductions  could be  substantial.  In the second  quarter of 1996,  the Company
determined  that one large customer under a long-term  contract  (accounting for
backlog of approximately $19.9 million) was not likely to raise the financing to
commence its service in the near future,  and  accordingly the Company no longer
considers such contract part of its backlog. Also in the second quarter of 1996,
the Company removed from its backlog a contract with a customer  (accounting for
backlog of approximately $4.5 million) which had ceased paying for the Company's
services.  In the fourth quarter of 1996, the Company removed $10.4 million from
its  backlog  related  to  contracts  under  which  customers  failed to use the
contracted service or failed to make timely payment. Orion presently anticipates
that at least $86.4  million of its $123 million in backlog (as of September 30,
1996, after pro forma adjustments for the Exchange) will be realized after 1997.
The Company's contracts commence and terminate on fixed dates. If the Company is
delayed in commencing service or does not provide the required service under


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<PAGE>
any particular contract,  as it has occasionally done in the past, it may not be
able to recognize  all the revenue it initially  includes in backlog  under that
contract.  In addition,  the current  backlog  contains  some  contracts for the
useful life of Orion 1; if the useful life of Orion 1 is shorter than  expected,
some portion of backlog may not be realized unless services  satisfactory to the
customer can be provided over another satellite.

TECHNOLOGICAL CHANGES


   Although  Orion  believes  that Orion 1 does employ,  and Orion 2 and Orion 3
will employ, advanced technologies, the telecommunications industry continues to
experience  substantial  technological  changes. The Company believes that there
are numerous  telecommunications  companies that are seeking ways to improve the
data transmission capacity of the existing terrestrial infrastructure. There can
be no assurance  that such changes will not  adversely  affect the  prospects or
proposed operations or expenses of Orion.


RISKS OF CONDUCTING INTERNATIONAL BUSINESS


   The Company's  international  service contracts are generally  denominated in
U.S.  dollars,  but it is possible that the portion of contracts  denominated in
non-U.S.  currencies will increase over time. The vast majority of the Company's
costs (including interest and principal of the Notes, other indebtedness and the
costs  for  VSATs,  Orion  2 and  Orion  3) are  denominated  in  U.S.  dollars.
Accordingly,  an  increase  in the  value  of U.S.  dollars  relative  to  other
currencies could have an adverse effect on the Company. International operations
are also  subject to certain  risks such as  changes  in  domestic  and  foreign
government regulations and telecommunication standards,  licensing requirements,
tariffs  or  taxes  and  other  trade   barriers  and   political  and  economic
instability.


DEPENDENCE OF ORION ON KEY PERSONNEL

   Orion's  business is dependent on its executive and other  officers and other
key personnel.  Orion presently does not have employment  contracts with, or key
man life insurance covering,  such key officers or other personnel.  The loss of
key officers or personnel could have an adverse effect on Orion. See "Management
of Orion and Orion Newco."

                       RISKS RELATING TO CAPITAL STOCK


CONTROL OF ORION NEWCO BY PRINCIPAL STOCKHOLDERS

   Executive  officers,  directors  and their  affiliates  are  expected  to own
beneficially  approximately 8.1 million shares or approximately 51% of the Orion
Newco voting stock that will be outstanding after the Transactions (12.0 million
shares or  approximately  46%,  of the Orion  Newco  voting  stock  that will be
outstanding after the Transactions on a fully diluted basis), assuming a closing
of the Transactions as of January 30, 1997. As a result of their stock ownership
and, in the case of stockholders with  representation on the Board of Directors,
the incumbency of directors affiliated with them, such stockholders are and will
continue to be in a position to elect the Board of Directors and thereby control
the affairs and management of Orion Newco and Orion.

RISKS RELATING TO ORION SENIOR PREFERRED STOCK


   The Company has outstanding  approximately  $15.8 million  (including accrued
dividends)  of Orion  Series A Preferred  Stock and  approximately  $4.7 million
(including  accrued  dividends) of Orion Series B Preferred  Stock.  Because the
rights of the  holders of the Orion  Newco  Senior  Preferred  Stock,  including
mandatory  redemption rights,  will be substantially  identical to the rights of
the holders of the Orion Senior  Preferred  Stock,  such rights  similarly could
adversely  affect Orion Newco or the rights of holders of the Orion Newco Common
Stock. Although Orion expects the holders of the Orion Senior Preferred Stock to
agree not to exercise any such mandatory redemption rights under the Orion Newco
Senior Preferred Stock while the Notes or the Debentures are  outstanding,  such
holders have the right to require Orion to

                                       29

<PAGE>


repurchase  the shares of Orion Common Stock  received as a result of conversion
of the Orion Senior Preferred Stock upon,  among other things,  certain mergers,
changes of control or sales of substantially  all the assets of Orion at the pro
rata interest of the holders of such stock in the consideration  received or, in
the case of certain  fundamental  changes,  fair market value; and, beginning in
June 1999,  such holders  have the right to require  Orion to  repurchase  Orion
Senior  Preferred Stock (and any Orion Common Stock received upon the conversion
thereof)  at the  fair  market  value  (in the case of Orion  Common  Stock)  or
liquidation value,  including accrued and unpaid dividends (in the case of Orion
Senior Preferred Stock). In addition, the documents relating to the Orion Senior
Preferred  Stock impose certain  covenants on Orion,  and failure to comply with
those covenants could have an adverse effect on Orion. See "Description of Orion
Newco Capital Stock -- Orion Newco Senior Preferred Stock."

LIMITATIONS ON DIVIDENDS ON ORION AND ORION NEWCO COMMON STOCK

   Orion has never paid any cash  dividends  on its Orion  Common Stock and does
not  anticipate  paying (or that Orion  Newco would pay) cash  dividends  in the
foreseeable  future.  Orion is not permitted to pay cash  dividends on the Orion
Common Stock as long as the Orion Senior Preferred Stock is outstanding, subject
to certain limited  exceptions.  The Notes Indentures and the agreements for the
Debenture Investments will effectively prohibit the payment of cash dividends on
the Orion Newco Common  Stock for the  foreseeable  future.  See "Price Range of
Orion Common Stock and Dividend Policy." 

POTENTIAL ADVERSE EFFECT OF SHARES ELIGIBLE FOR FUTURE SALE

   Upon completion of the Merger and the Exchange,  there will be  approximately
25.9 million  shares of Orion Newco Common Stock  outstanding on a fully diluted
basis,  assuming a closing of the Merger  Transactions  as of January 30,  1997.
Approximately  14.5  million  of  these  shares  will  initially  be held by the
Company's  current   stockholders  and  will  be  freely  transferable   without
restriction or further registration under the Securities Act, other than the 5.5
million  shares held by  "affiliates"  of the  Company,  as that term is defined
under the  Securities  Act.  The shares held by  affiliates  are  expected to be
eligible for sale pursuant to Rule 144 under the Securities  Act. The Exchanging
Partners,  as owners of the Orion Newco  Series C Preferred  Stock,  and British
Aerospace and Matra Marconi  Space,  as owners of the  Debentures,  will own the
remaining 11.4 million of such shares of Orion Newco Common Stock, which will be
issuable upon conversion of such  securities.  All of such remaining shares will
be deemed to be  "restricted  securities"  as that term is  defined in Rule 144.
However, the Exchanging Partners, British Aerospace and Matra Marconi Space will
be granted  certain  shelf,  demand and  "piggyback"  registration  rights  with
respect  to the Orion  Newco  Common  Stock  issuable  to them upon  conversion,
pursuant to which (in the case of the  Exchanging  Partners) the Company will be
required to prepare and cause to be filed, as soon as practicable after 180 days
following  consummation  of the  Merger  Transactions,  a  "shelf"  registration
statement  which will cover the  registration  of certain  Eligible  Registrable
Securities  (as defined to include  approximately  25% of the Orion Newco Common
Stock issuable to the Limited Partners upon  conversion).  The Company will also
be required to file certain  additional  shelf  registration  statements for the
Exchanging Partners so that they will continue to be able to sell, each quarter,
up to 25% of the Orion Newco Common Stock issuable to them upon conversion, on a
non-cumulative  basis, and certain additional shelf registration  statements for
British  Aerospace and Matra Marconi Space. No predictions can be made as to the
effect,  if any, that sales of Orion Newco Common Stock or the  availability  of
additional  shares  of Orion  Newco  Common  Stock  for  sale by the  Exchanging
Partners,  British  Aerospace  or Matra  Marconi  Space would have on the market
price  of such  securities  prevailing  from  time to  time.  Nevertheless,  the
foregoing  could  adversely  affect the market  prices of the Orion Newco Common
Stock and the ability of Orion Newco to raise equity financing. See "Orion Newco
Shares Eligible for Future Sale."

ANTI-TAKEOVER AND OTHER PROVISIONS OF THE CERTIFICATE OF INCORPORATION

   Orion's Certificate of Incorporation  includes, and Orion Newco's Certificate
of Incorporation will include, provisions that may discourage or prevent certain
types of  transactions  involving  an actual or  potential  change in control of
Orion  or  Orion  Newco,  respectively,  including  transactions 

                                       30

<PAGE>

in which the  stockholders  might  otherwise  receive a premium for their shares
over then current  market  prices.  In addition,  the Board of Directors has the
authority  to fix the rights and  preferences  of and issue  shares of preferred
stock,  which may have the effect of delaying or  preventing a change in control
of Orion or Orion Newco without action by the stockholders.  The staggered terms
of the  Company's  Board  of  Directors  could  also  discourage  any  potential
acquirer. The Certificates of Incorporation of Orion and Orion Newco also permit
the redemption of stock from  stockholders  where  necessary to protect  Orion's
regulatory  licenses.   Orion  Newco's  Certificate  of  Incorporation  will  be
substantially   identical  to  Orion's   Certificate   of   Incorporation.   See
"Description of Orion Newco Capital Stock -- Certain Anti-takeover  Effects." In
addition,  any change of control of Orion or Orion Newco is subject to the prior
approval of the FCC. See  "Information  About Orion's  Business -- Regulation --
Unauthorized Transfer of Control."

                                       31

<PAGE>


                             THE SPECIAL MEETING

INTRODUCTION


   This Proxy  Statement/Prospectus  is being  furnished to the  stockholders of
Orion Network Systems,  Inc. in connection with the solicitation by the Board of
Directors of Orion of proxies for use at a special meeting of stockholders to be
held on Thursday,  January 30, 1997 at 9:00 a.m.,  local time,  at 2440 Research
Boulevard, Suite 400, Rockville, Maryland.

   At the Special Meeting,  stockholders will be asked to consider and vote upon
proposals (i) to ratify the Merger Agreement and the  transactions  contemplated
thereby,  including the Merger, (ii) to approve and adopt the Exchange Agreement
and the transactions contemplated thereby,  including the Exchange, and (iii) to
approve  the  Debenture  Investments.  See "The  Merger,  the  Exchange  and the
Debenture Investments." Except for procedural matters incident to the conduct of
the  Special  Meeting,  Orion  does not know of any  matters  other  than  those
described  in the Notice of Special  Meeting that are to come before the Special
Meeting. 

VOTING RIGHTS AND RELATED MATTERS


   The shares of Orion capital  stock which may be voted at the Special  Meeting
consist of shares of Orion  Common  Stock and shares of Orion Series A Preferred
Stock and Orion  Series B  Preferred  Stock.  Each share of Orion  Common  Stock
eligible to vote  entitles its holder to one vote on all matters,  each share of
Orion Series A Preferred Stock eligible to vote entitles its holder to 117 votes
on all  matters  (the  number of votes  per share  determined  by  dividing  the
liquidation preference of the Orion Series A Preferred Stock of $1,000 per share
by the conversion price of $8.50 per share of Orion Common Stock) and each share
of Orion  Series B Preferred  Stock  eligible to vote  entitles its holder to 98
votes on all matters (the number of votes per share  determined  by dividing the
liquidation preference of the Orion Series B Preferred Stock of $1,000 per share
by the conversion price of $10.20 per share of Orion Common Stock). 

   The close of  business  on  December  23, 1996 has been fixed by the Board of
Directors  as the record  date for  determination  of  stockholders  entitled to
notice of, and to vote at, the Special Meeting.  On the record date,  10,974,121
shares of Orion Common Stock were  outstanding and eligible to be voted,  13,871
shares of Orion  Series A Preferred  Stock were  outstanding  and eligible to be
voted  (representing an aggregate of 1,622,907 votes), and 4,298 shares of Orion
Series B Preferred Stock were outstanding and eligible to be voted (representing
an aggregate of 421,204 votes) at the Special Meeting.  The foregoing share vote
calculations  reflect adjustments arising from the 1-1.36 reverse stock split of
the Orion Common Stock effected in July 1995.


   The holders of a majority of the votes of the shares of Orion  capital  stock
issued and outstanding and entitled to vote, present in person or represented by
proxy, treated as a single class, will be required to constitute a quorum at the
Special  Meeting.  Under  Delaware  law,  abstentions  and broker  non-votes are
counted for purposes of determining a quorum.

VOTES REQUIRED


   The affirmative vote of holders of a majority of votes of the shares of Orion
capital  stock  that are  entitled  to vote and that are  present  in  person or
represented by proxy at the Special Meeting,  treated as a single class, will be
required to approve each proposal to be considered at the Special Meeting. Orion
anticipates  that all  members  of the Board of  Directors  and  companies  they
represent (who held, in the aggregate, approximately 38% of Orion's voting stock
as of September  30, 1996) will enter into written  agreements  to vote for each
such proposal.

   Under Delaware law,  abstentions,  but not broker  non-votes,  are counted as
shares entitled to vote for purposes of determining  whether a proposal has been
approved by the necessary  number of votes.  Abstentions on a proposal will have
the effect of a vote against such proposal.

   The Merger will be effected in accordance with Section 251(g) of the Delaware
General  Corpora-

                                       32


<PAGE>


tion Law, which under certain circumstances permits a Delaware corporation (such
as Orion) to  reorganize  by merging with or intoa wholly owned  subsidiary of a
holding company (such as Orion Newco) without the requirement that  stockholders
of  such  Delaware   corporation   adopt  and  approve  the  Merger   Agreement.
Accordingly,  although the Merger  Agreement and the  transactions  contemplated
thereby,  including the Merger,  are being submitted for ratification by Orion's
stockholders  at  the  Special   Meeting   pursuant  to  contractual  and  other
requirements, no vote of Orion's stockholders adopting, approving or authorizing
the Merger  Agreement  and such  transactions  is required  under  Delaware law.
However,  the Company does not intend to proceed with Merger  without  obtaining
stockholder ratification.

NO DISSENTERS' RIGHTS


   Orion  stockholders  are not  entitled  under  Delaware  law to  appraisal or
dissenters'  rights  in  connection  with the  matters  submitted  by Orion  for
stockholder ratification or approval at the Special Meeting.


PROXIES


   A proxy may be revoked  by any Orion  stockholder  who  attends  the  Special
Meeting  and gives  notice  of such  stockholder's  intention  to vote in person
without compliance with any other formalities.  In addition, any stockholder may
revoke a proxy at any time  before it is voted by  executing  and  delivering  a
later dated proxy or by  delivering a written  notice to the  Secretary of Orion
stating that the proxy is revoked.  At the Special Meeting,  stockholders' votes
cast,  either in person or by proxy,  will be tabulated by persons  appointed by
the Board of Directors to act as inspectors of election.

   The cost of soliciting  proxies in the form  enclosed  herewith will be borne
entirely by Orion. In addition to the solicitation of proxies by mails,  proxies
may be  solicited  by officers  and  directors  and regular  employees of Orion,
without additional remuneration, by personal interviews, telephone, telegraph or
otherwise.  Orion may also  utilize the services of its  transfer  agent,  Fleet
National  Bank, to provide broker search and proxy  distribution  services at an
estimated cost of $2,000.  Copies of  solicitation  material may be furnished to
brokers, custodians, nominees and other fiduciaries for forwarding to beneficial
owners of shares of Orion Common Stock,  and normal handling charges may be paid
for such forwarding service.  All executed proxies received before the vote will
be voted in the manner  indicated.  EXECUTED BUT UNMARKED  PROXIES WILL BE VOTED
FOR  EACH OF THE  PROPOSALS  RELATING  TO THE  MERGER  AGREEMENT,  THE  EXCHANGE
AGREEMENT AND THE DEBENTURE  INVESTMENTS  SUBMITTED TO THE  STOCKHOLDERS  AT THE
SPECIAL MEETING.


                                       33

<PAGE>


            THE MERGER, THE EXCHANGE AND THE DEBENTURE INVESTMENTS


   The  following  discussion  summarizes  the  material  aspects  of the Merger
Transactions,  as set forth in the Merger Agreement and the Exchange  Agreement,
and the Debenture  Investments,  as set forth in the Debenture  Agreement.  This
discussion  is  qualified  in its  entirety by reference to the full text of the
Merger Agreement, the Exchange Agreement and the Debenture Agreement,  including
each of the exhibits thereto,  the material provisions of which are described in
this Proxy Statement/Prospectus. Copies of the Merger Agreement and the Exchange
Agreement are attached hereto as Attachments A and B,  respectively,  and a copy
of the  Debenture  Agreement  has been filed as an  exhibit to the  Registration
Statement of which this Proxy  Statement/Prospectus  is a part.  See  "Available
Information." 

BACKGROUND OF THE MERGER TRANSACTIONS AND THE DEBENTURE INVESTMENTS


   Orion's principal  business is the provision of satellite  communications for
private  communications  networks,  Internet access and video  distribution  and
other  satellite  transmission  services.  From its  inception  in 1982  through
January 20,  1995,  when Orion 1 commenced  commercial  operations,  Orion was a
development stage enterprise.  During this period,  Orion's efforts were devoted
primarily to monitoring the  construction,  launch and in-orbit testing of Orion
1, product  development,  marketing and sales of interim  private  communication
network services,  raising additional financing for such services,  marketing of
capacity and planning Orion 2 and Orion 3 and refinancing of Orion 1. Subsequent
to the acceptance of Orion Atlantic's first satellite, Orion 1, in January 1995,
Orion's efforts have been primarily focused on building customer  relationships,
marketing  and sales of  network  and  satellite  services,  as well as  ongoing
planning for the future  construction  of Orion 2 and Orion 3 and refinancing of
Orion 1.


   The Merger,  the Exchange and the Debenture  Investments arose out of Orion's
plans to refinance  Orion  Atlantic's  existing debt and finance two  additional
satellites,  Orion 2 (with coverage of Europe, Russia, the eastern United States
and Latin  America) and Orion 3 (with coverage of the Asia Pacific  region).  In
the fall of 1995,  Orion Atlantic  commenced but  ultimately  deferred a plan to
raise over $290  million of  financing  for Orion 2, plus $300 million of senior
secured  notes to repay the  existing  Orion 1 Credit  Facility  payments,  make
certain  repayments  to the Limited  Partners and provide  working  capital (the
"1995  Financing").  After the  decision  was made to defer the 1995  Financing,
Orion's  management  team  began  the  process  of  selecting  and  implementing
financing  plans that would allow Orion to refinance  Orion 1 and to  construct,
launch and operate Orion 2 and Orion 3. The objectives of the refinancing  would
be to  eliminate  the  credit  support  obligations  of  the  Limited  Partners,
including  Orion,  under the Orion 1 Credit Facility and to enable the financing
of Orion 2 to proceed. Orion believed that this would improve Orion's short-term
and long-term growth prospects and maximize Orion's  stockholders' equity value.
Based on the partnership structure of Orion Atlantic,  management worked closely
with the Limited Partners to develop an acceptable financing plan.

   On December 6, 1995, at a meeting of the Policy and Planning Review Committee
of Orion Atlantic, Salomon Brothers Inc ("Salomon Brothers") was asked to make a
presentation   analyzing   the  1995   Financing  and   recommending   financing
alternatives  available to Orion.  Salomon  Brothers  was selected  based on its
participation  in the 1995 Financing and role as lead manager of Orion's initial
public offering,  and its resulting  familiarity with the business and financial
condition of Orion.  Effective April 10, 1996,  Salomon  Brothers was engaged as
Orion's  financial  advisor in connection  with the Exchange.  Salomon  Brothers
ultimately  rendered an opinion to Orion  regarding the fairness to Orion from a
financial  point  of  view of the  consideration  to be  paid  by  Orion  in the
Exchange. See " Opinion of Orion's Financial Advisor" below.


   Throughout  the months of January  and  February  1996,  management  explored
alternative  financing  plans.  On February 13, 1996, a management team met with
representatives  of Salomon Brothers in New York City. At that meeting,  Salomon
Brothers  discussed,  among other things,  the possible mechanics of an exchange
for the Limited Partners'  partnership  interests,  and the  consideration  that
would need to be  provided  to the  Limited  Partners.  On  February  23,  1996,
management  drafted a memorandum  that outlined the structural  framework of the
financing  plan that  ultimately  evolved into the Merger  Transactions.  In the
February 23 memorandum,  management reiterated that the prospect of resurrecting
the 1995  Financing  appeared  doubtful.  Members of Orion's  Finance  Committee
discussed the February 23, 1996  management  memorandum by phone on February 27,
1996. 

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<PAGE>


   During the month of March 1996,  exploration of alternative  financing  plans
continued. On March 15, 1996, certain members of the Finance Committee discussed
the valuation of the consideration that would need to be provided to the Limited
Partners in exchange for their limited partnership  interests in Orion Atlantic.
On March 19, 1996, at a meeting of Orion's Finance Committee,  members discussed
the financing  alternatives  that would be available to Orion if the exchange of
the Limited Partners'  partnership  interests was not concluded.  Based on these
discussions,   the  Finance  Committee  recommended  that  management  pursue  a
financing  plan that  involved  an exchange  of the  Limited  Partners'  limited
partnership  interests in Orion Atlantic for Orion stock. The Finance  Committee
also requested management to prepare a valuation of Orion Atlantic that would be
submitted to the Board for approval.

   Certain  members of the Finance  Committee  conducted a telephone  conference
call on March 25, 1996,  to review  progress  made,  and to analyze the relative
merits of the financing plans that had been explored. Participants agreed on the
importance of selecting a financing  plan that would  achieve an improved  Orion
Atlantic  corporate  governance  structure  that  allowed  for  quicker and more
flexible  decision  making.  Participants  further  agreed  that this  corporate
governance  structure could be achieved by fully  exchanging Orion stock for the
Limited Partners' partnership interests.

   In  meetings  held on April  9,  1996,  management  reported  to the  Finance
Committee that it was refining a financing plan that would eliminate the limited
partner  guarantees and exchange  securities of Orion for the Limited  Partners'
limited partnership interests in Orion Atlantic. Discussions of the terms of the
proposed financing plan continued the next day.  Discussions of the terms of the
proposed  financing plan  continued  further at an April 17, 1996 meeting of the
Finance Committee.

   In an April 18, 1996  memorandum,  management  provided the Limited  Partners
with a status report on the new financing plan.  Management,  in the memorandum,
expressed its belief that the new financing plan would satisfy Orion's  criteria
for a financing plan,  refinancing  Orion 1 and financing the  construction  and
launch of Orion 2.

   A meeting of the Finance  Committee  was held on May 2, 1996,  to discuss the
new financing plan.  Management presented a document summarizing the basic terms
and conditions of the security  proposed to be issued to the Limited Partners in
exchange for their limited partnership  interests in Orion Atlantic.  Based upon
the meeting, the Finance Committee unanimously approved making a proposal to the
Limited Partners to exchange their interests in Orion Atlantic for securities of
Orion pursuant to the term sheet.

   On May 3, 1996,  management sent the Limited Partners a memorandum containing
details  of the  proposed  financing  plan.  In  the  May  3,  1996  memorandum,
management  outlined the terms of the Exchange.  As detailed in the  memorandum,
management  informed the Limited Partners that they had been working to select a
financing  strategy that would allow for the  refinancing  of the Orion 1 Credit
Facility and finance the construction and launch of Orion 2. Management informed
the Limited Partners that they had (based on management's evaluation) selected a
financing  plan. The  management  plan had a number of elements.  Initially,  in
order to simplify the structure of Orion Atlantic, the Limited Partners' limited
partnership  interests  in Orion  Atlantic and certain  obligations  owed to the
Limited  Partners  by  Orion  Atlantic  would  be  exchanged  for a  convertible
preferred  security of Orion.  The security  would be  convertible  into Orion's
common stock.  In connection  with the exchange,  Orion would secure  additional
capital by conducting a convertible debt offering. The simplified Orion Atlantic
structure would enhance the marketability of Orion's  convertible debt offering.
Proceeds of the convertible  debt offering would be used to fund an initial down
payment for the  construction and launch of Orion 2 and a portion of the initial
down  payment  for the  construction  and  launch of Orion 3.  Based  upon prior
discussions with British Aerospace through its representative on the Orion Board
of  Directors  and Finance  Committee,  Orion  proposed  that $50 million of the
convertible  debt offering be purchased by British  Aerospace.  Vendor financing
would supplement the convertible debt offering proceeds,  and go towards meeting
the capital needed to construct and launch Orion 2 (and, if possible,  Orion 3).
Concurrently  with the  convertible  debt offering and the arrangement of vendor
financing,  Orion would conduct a bond offering designed to raise enough capital
to refinance the Orion 1 Credit Facility, and provide for working capital. 

   In response to a request by certain  Limited  Partners,  the plan was further
refined.  In particular,  the Company asked Ernst & Young LLP to review the plan
from a tax perspective and determine whether

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<PAGE>


a transaction  could be structured that would provide the Limited  Partners with
non-recognition  treatment (in whole or in part) in connection  with an exchange
of their  interests in Orion Atlantic for stock.  After  reviewing  management's
plan, Ernst & Young LLP advised  management that the structure  described herein
would provide (i) the  Exchanging  Partners with the  opportunity to qualify for
nonrecognition  treatment  under  Section  351 of the Code  and  (ii) the  Orion
stockholders with similar  nonrecognition  treatment under either Section 351 or
Sections 354 and 368(a) of the Code,  subject to certain  exceptions  summarized
below,  and provided certain  requirements  are satisfied.  See "Certain Federal
Income Tax Consequences" below.

   Following  distribution  of the May 3, 1996  memorandum  detailing the Merger
Transactions to the Limited  Partners,  management and Orion's counsel proceeded
to negotiate the definitive  documentation  relating to the Merger Transactions.
On May 20, 1996, counsel to Orion and the Limited Partners met for a negotiation
session, and negotiations  continued through approximately the end of June 1996.
The  terms of the  Merger  Transactions,  including  the  exchange  ratio,  were
determined  as a result  of arm's-  length  negotiations  between  Orion and its
advisors and the Limited  Partners and their advisors.  One of the conditions to
the Merger  Transactions was the purchase of $50 million of the convertible debt
offering by British  Aerospace,  and British  Aerospace  expressed its intent to
make such  purchase,  on the same terms as the portion of the  convertible  debt
offering to be offered to the public.

   During late June and early July 1996,  each of the  Exchanging  Partners (but
not Orion)  executed  copies of the  Exchange  Agreement  and  various  exhibits
thereto.  The executed  counterparts  were placed into escrow to be delivered to
Orion, OrionSat or Orion Newco on the date of the Exchange.

   During  late June and July 1996,  Orion  worked with its  financial  advisor,
Salomon  Brothers,  regarding  possible bond and  convertible  note  financings.
Salomon Brothers informed Orion during July that the zero coupon high yield bond
market in the communications sector was experiencing a general downturn and that
it would not be advantageous to seek to raise the financing at that time.  Based
on this  advice,  the  Board  decided  to defer  the bond and  convertible  note
offerings  and the  Exchange  until  the  market  for  high  yield  bonds in the
communications  sector had  improved  sufficiently  to allow  Orion to raise the
capital it desired.

   Between July 1996 and  November  1996,  Orion  management  consulted  several
investment  banks to  explore a variety of  alternative  financing  methods  and
potential   transactions.   In  November  1996,   Orion   selected   prospective
underwriters for the proposed Notes Offering, and commenced preparations for the
Notes Offering.

   Salomon  Brothers  rendered to the Board of  Directors  of Orion,  at a Board
meeting, its opinion dated December 10, 1996 that, based upon and subject to the
various  considerations  set forth in the opinion,  as of December 10, 1996, the
consideration to be paid by Orion in connection with the Exchange is fair from a
financial point of view to Orion.  Management confirmed its view that the Merger
Transactions  are in the best interests of Orion and its  stockholders.  Orion's
Board of Directors,  on December 10, 1996, after careful  deliberation  (with W.
Anthony  Rice,  a  representative  of  British  Aerospace,   recusing  himself),
unanimously  approved the Exchange and the Exchange  Agreement  (which  includes
effecting the Merger).  Salomon  Brothers  delivered its fairness  opinion later
that day.

   In December 1996 and January 1997 Orion and the Exchanging Partners conducted
negotiations  concerning certain changes to the Exchange  Agreement,  which were
ultimately  agreed upon in the First Amendment to the Exchange  Agreement.  Such
changes  included  agreement by the  Exchanging  Partners to an extension of the
termination date for the Exchange Agreement to April 30, 1997, agreement for the
cash refund of payments made by the  Exchanging  Partners after January 29, 1997
under  the  Orion 1 Credit  Facility  Support  (to the  extent  Orion  Newco has
sufficient funds to make such refund after payment of various agreed items), and
substitution  of the Debenture  Investments  for the previously  proposed public
offering of convertible debt securities.

   Also in December 1996,  Orion and British  Aerospace  commenced  negotiations
concerning the terms of the Debenture Investments. Matra Marconi Space agreed to
make the  Matra  Marconi  Investment  of $10  million  on the same  terms as the
British Aerospace Investment. Orion's Board of Directors, on January 3, 1997 and
again on January 8, 1997,  (with W. Anthony  Rice, a  representative  of British


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<PAGE>
Aerospace,  recusing himself),  unanimously approved the Debenture  Investments.
Effective as of January 13, 1997, Orion and British  Aerospace and Matra Marconi
Space executed the Debenture Agreement.


REASONS FOR THE MERGER TRANSACTIONS AND THE DEBENTURE INVESTMENTS


   Orion   believes  that  the  Merger   Transactions   will  simplify   Orion's
organizational  structure  and improve its access to the  capital  markets.  The
Transactions will consolidate  outside investor ownership at the holding company
level,  Orion  Newco,  and leave Orion Newco with 100%  ownership  of all of its
material subsidiaries, including Orion Atlantic. This will promote a streamlined
corporate governance  structure that will facilitate improved,  quicker decision
making. By eliminating  minority  interests in the Orion  subsidiaries that hold
satellite assets,  Orion Newco will be able to pursue independently its business
plans and financings for all of its satellites.  The  Transactions  will further
simplify  Orion's  structure by eliminating  (in exchange for Orion Newco stock)
the obligations Orion Atlantic owes to the Exchanging Partners.  As of September
30, 1996, such obligations aggregated approximately $37.5 million.  Finally, the
increase in  outstanding  securities as a result of the Merger  Transactions  is
expected to increase Orion's overall market capitalization, which Orion believes
will also improve its access to the capital markets.

   Orion's  principal  reason for the issuance of $50 million of  Debentures  to
British  Aerospace  is to raise  additional  capital for initial  payments  with
respect to Orion 2, of which  approximately  $49.4  million of payments  are due
under the Orion 2 Satellite  Contract  during  1997.  The sale of $10 million of
Debentures to Matra Marconi Space will involve a re-investment  by Matra Marconi
Space of $10 million of the $13 million of satellite  incentive  payments  Matra
Marconi Space will receive as the Orion 1 manufacturer  upon consummation of the
Notes Offering.  The consummation of the Debenture Investments is a condition to
the Exchange.

   Access to the capital  markets is necessary for Orion to achieve its business
plan to construct and launch two additional  satellites,  Orion 2 (with coverage
of Europe,  Russia,  the eastern  United  States and Latin  America) and Orion 3
(with coverage of the Asia Pacific  region).  With this plan in mind,  Orion and
Orion  Newco  have been  pursuing  and will  continue  to pursue  the  following
transactions:

   (i) Notes Offering:  the Notes Offering in the amount of  approximately  $347
million with expected gross proceeds of  approximately  $275 million,  excluding
approximately $72 million of overfunding of interest due on such notes (although
the amount of such Notes  Offering  could be smaller or larger,  depending  upon
market conditions).  The principal purpose of the Notes Offering is to refinance
the Orion 1 Credit Facility and release the existing  commitments of the Limited
Partners and their  affiliates under the Orion 1 Credit Facility  Support.  Such
release is a condition to the Exchange.

   (ii) Orion 2 Construction Contract: the Orion 2 Satellite Contract with Matra
Marconi  Space,  under which the  manufacturer  is to proceed with  construction
based upon initial payments of $25 million and further payments through December
1997  limited to  approximately  $25  million.  Orion  expects to  commence  the
construction of Orion 2 immediately following completion of the Notes Offering.

   (iii) Orion 3  Construction  Contract:  the Orion 3 Satellite  Contract  with
Hughes Space, under which the manufacturer is to proceed with construction based
upon initial  payments  through January 31, 1997 of  approximately  $15 million,
with  further  payments  through  March 31, 1998 being  limited to $35  million,
payable in  approximately  equal  quarterly  installments.  The  majority of the
amounts due under the contract  are payable in the second and third  quarters of
1998.  Orion commenced  construction  of Orion 3 in  mid-December  1996 under an
authorization  to  proceed,  and  expects to enter into a  definitive  satellite
contract in January 1997.

   As discussed above under the caption  "Background of the Merger  Transactions
and the  Debenture  Investments,"  Orion  believes  that it would not be able to
complete  these  financings  in the absence of the Merger,  the Exchange and the
Debenture Investments.  Orion believes that the construction and launch of Orion
2 and Orion 3 will offer  stockholders an opportunity to realize long-term value
through the potential  appreciation  in the value of Orion's stock (as converted
into Orion Newco stock) due to the increased revenues anticipated to result from
the operation of Orion 2 and Orion 3.


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<PAGE>

   Even if  stockholders  ratify or  approve  the  Merger  Transactions  and the
Debenture  Investments,  and the other conditions to the Merger Transactions and
the Debenture  Investments are satisfied,  the Orion Board of Directors reserves
the  right,  based on its  consideration  of market  conditions  and such  other
factors as it considers appropriate, to cause Orion not to consummate the Merger
Transactions  and  the  Debenture   Investments  if  it  determines  the  Merger
Transactions  and the Debenture  Investments are no longer in the best interests
of Orion stockholders.

THE MERGER AGREEMENT

TERMS OF THE MERGER AGREEMENT


   Effective  as of  January  8,  1997,  Orion,  Orion  Newco and  Orion  Merger
Subsidiary  entered  into the Merger  Agreement,  pursuant to which Orion Merger
Subsidiary  will be merged with and into  Orion,  and Orion will become a wholly
owned subsidiary of Orion Newco. At the Effective Time of the Merger (as defined
below),  each  outstanding  share of Orion  Common Stock and each share of Orion
Series A Preferred  Stock and Orion Series B Preferred  Stock will be converted,
without any action on the part of the holder thereof,  into the right to receive
one share of Orion Newco Common Stock,  Orion Newco Series A Preferred Stock and
Orion  Newco  Series  B  Preferred  Stock,  respectively.  It is  expected  that
approximately  10,974,121  shares of Orion Newco Common Stock,  13,871 shares of
Orion Newco  Series A Preferred  Stock and 4,298  shares of Orion Newco Series B
Preferred  Stock  will be issued to the  stockholders  of Orion in the Merger in
exchange for their shares of Orion Common Stock,  Orion Series A Preferred Stock
and Orion  Series B Preferred  Stock,  respectively.  Such shares of Orion Newco
Series A  Preferred  Stock and Orion  Newco  Series B  Preferred  Stock  will be
convertible as of the issuance date into an aggregate of approximately 2,053,255
shares of Orion Newco Common Stock, or approximately 7.9% of the shares of Orion
Newco Common Stock  outstanding on a fully diluted basis,  assuming a closing of
the Merger as of January 30, 1997.

   The Merger  will  become  effective  upon the filing of the  Delaware  Merger
Certificate  (as such term is used in the Merger  Agreement)  with the  Delaware
Secretary  of  State,  which is  expected  to occur  following  ratification  or
approval  of the  Merger  Transactions  and  the  Debenture  Investments  by the
requisite  vote of the Orion  stockholders,  and  satisfaction  or waiver of the
other  conditions set forth in the Merger  Agreement and the Exchange  Agreement
(the "Effective Time of the Merger").

   The Merger  Agreement  provides that Orion Merger  Subsidiary  will be merged
with and into Orion,  and that Orion will be the surviving  corporation and will
become a wholly owned  subsidiary  of Orion  Newco.  Following  the Merger,  the
separate  existence  of Orion  Merger  Subsidiary  will  cease.  Effective  upon
consummation of the Merger,  Orion will change its name to Orion Oldco Services,
Inc. and, as soon as practicable thereafter, Orion Newco will change its name to
Orion  Network  Systems,  Inc.  The  Merger  Agreement  also  provides  that the
Certificate of Incorporation and Bylaws of Orion in effect  immediately prior to
the Effective Time of the Merger will be the Certificate of Incorporation  (with
certain  amendments) and Bylaws of the surviving  corporation.  The officers and
directors of the surviving  corporation will consist of the current officers and
directors of Orion. See "Management of Orion and Orion Newco."

   At the Effective Time of the Merger, all outstanding stock options, including
those under  Orion's  1987 Stock  Option Plan and  Non-Employee  Director  Stock
Option Plan (the "Orion Options"), will be assumed by Orion Newco to the fullest
extent  permitted by  applicable  law (such assumed  options  being  referred to
herein as "Orion Newco Assumed  Options").  Each Orion Newco Assumed Option will
be subject  to the same  terms and  conditions  that were  applicable  under the
related Orion Option immediately prior to the Effective Time of the Merger.

   Orion and Orion Newco have  agreed to take all  corporate  and other  actions
necessary to  effectuate  the  assumption  of the Orion  Options,  and Orion has
agreed to use its best efforts  prior to the closing of the Merger to obtain any
consents  from the holders of Orion  Options that may be necessary to effectuate
such assumption, if required by the terms of the Orion Options. Orion Newco also
has agreed to take all corporate and other actions necessary to reserve and make
available  sufficient  shares of Orion  Newco  Common  Stock for  issuance  upon
exercise of the Orion Newco Assumed Options.


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<PAGE>
   At the Effective Time of the Merger,  Orion Newco will, to the fullest extent
permitted by applicable law, assume all of Orion's  obligations  with respect to
each outstanding warrant or other right to purchase shares of Orion Common Stock
upon the same terms and  conditions  that were  applicable  under  such  warrant
immediately prior to the Effective Time of the Merger.

   For  more  information  on  the  specific  terms  of  the  Merger  Agreement,
stockholders are referred to the full text of the Merger  Agreement  attached to
this Proxy Statement/Prospectus as Attachment A.

NO EXCHANGE OF CERTIFICATES


   At the Effective Time of the Merger,  by virtue of the Merger and without any
action  on the part of  Orion,  Orion  Merger  Subsidiary,  Orion  Newco,  Orion
stockholders or any other person, the shares of Orion Newco capital stock, which
the shares of Orion stock  respectively  will have been converted into the right
to receive,  will be  represented  and evidenced by the same stock  certificates
that previously represented and evidenced the Orion capital stock. 

CONDITIONS TO OBLIGATIONS TO EFFECT THE MERGER


   The respective  obligations  of each party to the Merger  Agreement to effect
the Merger are subject to the  satisfaction  of the  following  conditions at or
prior to the closing of the Merger:

   (i)  the   ratification  of  the  Merger   Agreement  and  the   transactions
contemplated  thereby by the  requisite  affirmative  vote of the holders of the
Orion  capital  stock  and  the  approval  of  the  Merger   Agreement  and  the
transactions  contemplated  thereby  by the  requisite  affirmative  vote of the
holder  of the  outstanding  Orion  Newco  Common  Stock  and the  holder of the
outstanding Orion Merger Subsidiary common stock;

   (ii) the receipt of all authorizations,  consents, orders or approvals of, or
making of all filings with, any Governmental Entity (as such term is used in the
Merger Agreement) necessary for consummation of the Merger;

   (iii) the  effectiveness of the  Registration  Statement under the Securities
Act and the absence of any stop order with respect to the Registration Statement
and of any proceedings commenced or threatened by the Commission with respect to
this Proxy Statement/Prospectus;

   (iv) the absence of any temporary restraining order, preliminary or permanent
injunction or other order issued by any court of competent jurisdiction or other
legal restraint or prohibition preventing consummation of the Merger;

   (v)  the  absence  of  any  statute,   rule  or  regulation  enacted  by  any
Governmental Entity that would make consummation of the Merger illegal;

   (vi) the receipt of an opinion  from Ernst & Young LLP, tax advisor to Orion,
and a determination  by the Board of Directors of Orion to the effect that Orion
stockholders  do not recognize gain or loss for United States federal income tax
purposes;

   (vii) the continued  accuracy of the  representations  and warranties made by
each party in the Merger Agreement; and

   (viii) the consummation of the Exchange concurrently with the Merger.

AMENDMENT AND TERMINATION

   The Merger  Agreement  may be amended by Orion,  Orion Newco and Orion Merger
Subsidiary at any time before or after ratification or approval of the Merger by
the stockholders of such companies,  but after any such stockholder ratification
or approval, no amendment may be made which under Section 251(d) of the Delaware
General  Corporation  Law would  require the approval  (or further  approval) of
stockholders without obtaining such stockholder approval.


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<PAGE>
   The Merger  Agreement  may be  terminated  at any time prior to the Effective
Time of the Merger,  whether before or after  ratification  or approval,  as the
case may be, of the Merger  Agreement and related matters by the stockholders of
Orion,  Orion Newco and Orion Merger  Subsidiary (i) by mutual consent of all of
the parties or (ii) by any party, if any required  approval of the  stockholders
of Orion,  Orion Newco or Orion Merger Subsidiary has not been obtained by April
30, 1997. 


ACCOUNTING TREATMENT

   The Merger will be accounted for as a reorganization of entities under common
control.  As a result,  the assets and liabilities  transferred  pursuant to the
Merger  will be  accounted  for at a  historical  cost in a manner  similar to a
pooling of interests.

THE EXCHANGE AGREEMENT

PARTIES

   The Exchange  Agreement was entered into by Orion,  OrionSat,  Orion Atlantic
and the Exchanging Partners effective as of June 1996.

   ORION. Orion is a Delaware corporation, the 100% owner of OrionSat, a limited
partner of Orion Atlantic with a 16.66% equity interest, and the holding company
of other subsidiaries,  including OrionNet,  Inc. Orion owns and operates one of
the first privately owned  international  satellite  communications  networks as
well as video distribution and other satellite transmission services.  Since its
founding in 1982, Orion's efforts have been focused on the design,  construction
and  implementation of a global satellite  communications  system that meets the
expanding telecommunications needs of a multinational business. The consolidated
financial  statements of Orion include the financial  results of Orion  Atlantic
because of OrionSat's control of Orion Atlantic as its sole general partner. See
"Selected Consolidated Financial and Operational Data of Orion."

   ORIONSAT.  OrionSat  is a wholly  owned  subsidiary  of Orion and is the sole
general partner of Orion Atlantic with a 25% equity interest.

   ORION ATLANTIC.  Orion Atlantic,  a Delaware  limited  partnership,  owns and
operates the Orion 1 communications  satellite.  In 1991, Orion and seven of the
world's leading  telecommunications and aerospace systems companies formed Orion
Atlantic to finance the construction,  launch and operation of two communication
satellites, and to operate a multinational sales and services organization.

   EXCHANGING   PARTNERS.   The  Exchanging   Partners  are  British   Aerospace
Communications,  Inc. ("BAe"),  COM DEV Satellite  Communications  Limited ("COM
DEV"), Kingston  Communications  International  Limited  ("Kingston"),  Lockheed
Martin  Commercial  Launch Services,  Inc.  ("Lockheed Martin CLS"), MCN Sat US,
Inc. ("Matra"), and Trans-Atlantic Satellite, Inc ("Nissho").

   The following sets forth certain information regarding each of the Exchanging
Partners:

   BAe is a subsidiary of British Aerospace Public Limited Company (collectively
with its affiliates, "British Aerospace"), which is Europe's leading defense and
aerospace  company and one of the  leading  companies  in the world  defense and
aerospace market.

   COM DEV is a  subsidiary  of COM DEV,  Limited.  COM DEV,  Limited  is also a
supplier of value-added satellite communications services, products for wireless
personal communications and satellite remote sensing data.

   Kingston is a  subsidiary  of Kingston  Communications  (Hull) plc,  the only
municipally-owned  telephone company in the United Kingdom.  Kingston  Satellite
Services,  a joint  venture  to  which  Kingston  is a  party,  serves  as sales
representative and ground operator for Orion Atlantic in the United Kingdom.

   Lockheed  Martin CLS was formerly  named Martin  Marietta  Commercial  Launch
Services,   Inc.  Lockheed  Martin  CLS  is  a  subsidiary  of  Martin  Marietta
Technologies,  Inc., a Lockheed Martin company. Lockheed Martin CLS acquired the
assets of General  Dynamics  Commercial  Launch  Services  

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<PAGE>
through a transfer  of assets from Martin  Marietta  Corporation,  which in turn
acquired these and other assets  (including the Atlas family of launch vehicles)
from General Dynamics  Corporation in 1994.  Lockheed Martin CLS is a commercial
launch  services  provider and provided launch services to Orion Atlantic as the
launch  subcontractor.  Lockheed  Martin  CLS  became an  Exchanging  Partner by
acquiring the limited  partnership  interest of General Dynamics CLS in the 1994
transaction described above.

   Matra is a subsidiary of Matra  Hachette  ("Matra  Hachette"),  an aerospace,
defense, industrial and media company and part of the Lagardere Group of France.
Matra Hachette is a sales  representative and ground operator for Orion Atlantic
in France. Matra Hachette is one of the parent companies of Matra Marconi Space,
which is the present parent company of MMS Space Systems,  the prime  contractor
for Orion 1, and is the manufacturer under the Orion 2 Satellite Contract.

   Nissho is a subsidiary of Nissho Iwai Corporation, a trading company based in
Japan.

STRUCTURE OF THE EXCHANGE

   ORION  NEWCO  FORMATION.  Under the  Exchange  Agreement,  the parties to the
Exchange Agreement agreed that Orion would form a new Delaware corporation to be
named  Orion  Newco  Services,  Inc.  which is  substantially  identical  in all
material respects to Orion. In particular,  Orion Newco would have a certificate
of incorporation,  bylaws and capital structure  substantially  identical in all
material  respects to those of Orion.  Orion became the initial  stockholder  of
Orion Newco and owns all shares of Orion  Newco  Common  Stock.  Pursuant to the
terms of the  Exchange  Agreement,  Orion will take steps  necessary to make the
management of Orion Newco  identical to the management of Orion.  Subject to and
effective  upon  the  consummation  of the  Merger,  the  Orion  Newco  board of
directors  will consist of the ten current Orion  directors and Orion Newco will
change its name to Orion Network  Systems,  Inc. The Orion Newco management team
will  consist of the current  Orion  management  team.  Pursuant to the Exchange
Agreement, Orion will take the steps necessary to adopt, authorize,  execute and
file (i) a Certificate of  Designations,  Rights and  Preferences of Series A 8%
Cumulative  Redeemable  Convertible Preferred Stock of Orion Newco substantially
identical  in all material  respects to the Orion  Series A Preferred  Stock and
(ii) a  Certificate  of  Designations,  Rights  and  Preferences  of Series B 8%
Cumulative  Redeemable  Convertible Preferred Stock of Orion Newco substantially
identical in all material respects to the Orion Series B Preferred Stock.

   ORION NEWCO  SERIES C PREFERRED  STOCK.  Under the  Exchange  Agreement,  the
parties  agreed  that Orion  Newco would  adopt,  authorize,  execute and file a
Certificate of  Designations,  Rights and  Preferences of Series C 6% Cumulative
Redeemable  Convertible  Preferred  Stock  establishing  the terms and  relative
rights of preferences of the Orion Newco Series C Preferred Stock. Assuming that
the Exchange  closes as of January 30, 1997,  121,988  shares of the Orion Newco
Series C Preferred  Stock  would be issued to the  Exchanging  Partners.  If the
Exchange  closes after  January 30, 1997,  Orion Newco will be obligated to make
certain cash refunds of payments made by the Exchanging Partners after that date
under various  agreements;  if Orion Newco does not have sufficient cash to make
such  refunds,  the  refunds  will be made in  shares  of Orion  Newco  Series C
Preferred  Stock, and the number of shares issued in the Exchange will increase.
See "Closing After January 30, 1997" below.  The number of shares of Orion Newco
Series C Preferred  Stock to be issued to the  respective  Exchanging  Partners,
pursuant to the Exchange Agreement,  will be adjusted proportionately to reflect
any subdivision, stock split, stock dividend,  recapitalization,  combination or
reverse  stock  split of Orion  capital  stock or similar  transaction  by Orion
between the date of the Exchange Agreement and the consummation of the Exchange.
The  Exchanging  Partners  have agreed to  transfer  their  limited  partnership
interests in Orion Atlantic,  other rights relating  thereto and amounts owed to
them by Orion Atlantic aggregating  approximately $37.5 million at September 30,
1996 to Orion in exchange  for such shares of the Orion Newco Series C Preferred
Stock.

   AGREEMENT TO THE MERGER. In the Exchange  Agreement,  the parties agreed that
Orion  Newco would form a new  Delaware  corporation  to be named  Orion  Merger
Subsidiary,  Inc.,  and that Orion Newco would be the sole  stockholder of Orion
Merger  Subsidiary.  Further,  the  parties  agreed  pursuant  to  the  Exchange
Agreement that Orion Merger  Subsidiary would be merged with and into Orion in a
merger in which Orion would be the surviving company and all the assets, rights,
property, liabilities and obligations of Orion 

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<PAGE>

Merger  Subsidiary and Orion would be vested in Orion as the surviving  company.
Pursuant to Exchange Agreement, Orion agreed to cause all necessary documents to
effect the Merger to be prepared.

   RESULTS OF THE EXCHANGE. As a result of the Exchange,  the consolidated Orion
group will become the owner of all the  partnership  interests in Orion Atlantic
(through Orion Newco and Orion as the sole limited  partners and OrionSat as the
sole general partner of Orion Atlantic).  In addition,  Orion Newco will receive
the following rights  currently held by the Exchanging  Partners with respect to
Orion Atlantic:   (i) all of the  Exchanging  Partners'  rights and  obligations
under the Second  Amended and Restated  Partnership  Agreement of  International
Private Satellite  Partners,  L.P., as amended and restated  simultaneously with
the Exchange (the "Partnership Agreement"),  including particularly all of their
rights to receive distributions and allocations  thereunder,  but also all other
rights they may have as limited partners of Orion Atlantic under applicable law;
(ii)  all of the  rights  and  obligations  held by  certain  of the  Exchanging
Partners  under the Refund  Agreement,  dated  December  31,  1994,  among Orion
Atlantic,  OrionSat,  Orion and the  certain  of the  Exchanging  Partners  (the
"Refund Agreement"),  consisting primarily of rights by such Exchanging Partners
to receive an aggregate of $26.7 million of refunds thereunder; (iii) all of the
rights of COM DEV,  Kingston,  Lockheed Martin CLS and Matra under the Preferred
Participating  Unit  Agreements,  dated  as of  October  7,  1993,  among  Orion
Atlantic,  OrionSat,  and each of Orion, COM DEV, Kingston,  Lockheed Martin CLS
and Matra  (the "PPU  Agreement"),  consisting  primarily  of rights to  receive
repayment  of $6.6  million  advanced  thereunder  and $4.3  million of interest
accrued on such advances;  (iv) all of the Exchanging Partners' rights under the
Preferred  Bidders  Agreement,  effective as of December,  20, 1991, among Orion
Atlantic,  OrionSat,  Orion and the Exchanging  Partners (the "Preferred Bidders
Agreement"),  consisting of preferred  bidder status with respect to procurement
contracts  entered  into by Orion  Atlantic;  and (v) certain of the  Exchanging
Partners' rights under other agreements  between or among Orion Atlantic and its
Limited  Partners,  which  Orion  believes  are not  material  to Orion  but the
acquisition of which will result in termination of contractual  obligations that
may impose procedural or other burdens on Orion Atlantic.

   As a result of the  Exchange,  Orion Newco will  transfer  to the  Exchanging
Partners  the  following  numbers of shares of Orion  Newco  Series C  Preferred
Stock, assuming a closing as of January 30, 1997 (in each case, which numbers of
shares  will be  increased  pursuant  to a formula  based upon  payments  by the
Exchanging Partners under various agreements if the closing occurs after January
30, 1997, except to the extent that such payments are refunded in cash):

                         EXCHANGING PARTNERS       NUMBER OF SHARES
                         -------------------       ----------------
                         BAe ................      50,129
                         COM DEV ............      9,462
                         Kingston ...........      11,198
                         Lockheed Martin 
                         CLS.................      19,534
                         Matra ..............      17,727
                         Nissho..............      13,938

   The terms of the Orion Newco  Series C Preferred  Stock are  described  below
under "Description of the Orion Newco Series C Preferred Stock."

CONDITIONS TO THE EXCHANGE

   Orion and the  Exchanging  Partners.  Occurrence  of the Exchange is subject,
among  other  things,  to  satisfaction  or waiver  by Orion and the  Exchanging
Partners of the following conditions:

   (i) Orion Newco, Orion Atlantic,  Orion and OrionSat shall have completed the
Orion 1 Credit Facility Refinancing.  See "The Related Transactions -- The Notes
Offering/Orion 1 Credit Facility Refinancing."

   (ii) Orion Newco, Orion Atlantic, Orion, OrionSat and the Exchanging Partners
shall have caused the termination (the "Bank Agreement  Termination"),  which is
expected  to  occur  concurrently  with  the  completion  of the  Orion 1 Credit
Facility Refinancing, of all agreements between or among the Banks and Chase, on
the one hand, and one or more of Orion Newco,  Orion Atlantic,  OrionSat,  Orion
and the 

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<PAGE>
Exchanging  Partners and/or their affiliates on the other hand,  relating to the
Orion 1 Credit  Facility or the  security or credit  support  thereof.  See "The
Related Transactions -- The Notes Offering/Orion 1 Credit Facility Refinancing."

   (iii)  Orion  Newco,  Orion  Atlantic,  Orion,  OrionSat  and the  Exchanging
Partners   shall  have  caused  the   termination   (the   "Capacity   Agreement
Termination"),  which is expected to occur  concurrently  with the completion of
the Orion 1 Credit Facility Refinancing and the Bank Agreement  Termination,  of
all support  obligations with respect to the Orion 1 Credit  Facility.  See "The
Related Transactions -- The Notes Offering/Orion 1 Credit Facility Refinancing."

   (iv) The Option  Agreement,  dated December 10, 1996,  between Orion Atlantic
and Matra Marconi Space shall be in full force and effect,  Orion Atlantic shall
not be in default  thereunder  and Orion  Atlantic  shall have made all payments
required to be made  thereunder  through the earlier of the closing  date of the
Exchange and March 31, 1997, and the Restated  Amendment #10, dated December 10,
1996,  to the Orion 1 Satellite  Contract  shall be in full force and effect and
Orion  Atlantic  shall not be in  default  thereunder.  See  "Information  About
Orion's Business -- Implementation of the Orion Satellite System -- Orion 2."

   (v)  Consents  needed  for  the  Exchange  shall  have  been  obtained.   See
"Approvals" below.

   (vi) Orion Newco shall be incorporated  with a certificate of  incorporation,
bylaws, capital structure and management substantially identical in all material
respects to those of Orion.

   (vii) The Merger shall have occurred, or be occurring  concurrently with, the
Exchange.

   (viii) The  Exchanging  Partners  shall have received an opinion from Ernst &
Young LLP, tax advisor to Orion, in form and substance  reasonably  satisfactory
to the  Exchanging  Partners,  to the effect  that the Merger and the  Exchange,
taken together, will be a tax-free exchange described in Code Section 351(a).

   Lockheed  Martin CLS. In  addition  to the  conditions  noted above under the
caption "Orion and the Exchanging  Partners,"  Lockheed Martin CLS's obligations
under the Exchange  Agreement are conditioned upon the satisfaction or waiver by
Lockheed  Martin CLS of the condition that Lockheed Martin CLS and Matra Marconi
Space enter into a subcontract to the Orion 2 Satellite Contract relating to the
launch of Orion 2. See "Information  About Orion's Business -- Implementation of
the Orion Satellite System -- Orion 2."

   Orion Parties. In addition to the conditions noted above under "Orion and the
Exchanging   Partners,"  the  Orion  parties'  obligations  under  the  Exchange
Agreement are conditioned upon the following:

   (i) The approval of the stockholders of Orion of the Merger Agreement and the
Exchange Agreement shall have been obtained.

   (ii) The Partnership Agreement shall have been amended and restated as of the
date of the Exchange.

   (iii)  Orion  Newco shall have  raised  approximately  $60  million  from the
Debenture Investments.

   The Orion 1 Credit  Facility  Refinancing,  Bank  Agreement  Termination  and
Capacity  Agreement  Termination  are dependent on successful  completion of the
Notes Offering,  which in turn depends upon market conditions and other factors,
and there can be no assurance that the Notes Offering will occur. Orion believes
that the  conditions  relating  to the  Orion 2  Satellite  Contract  and  other
arrangements  with Matra Marconi Space have been satisfied,  that the conditions
relating to the Lockheed Martin CLS  subcontract  have been satisfied or waived,
that the  Partnership  Agreement  amendment  has  been  obtained,  that  binding
commitments  to make the  Debenture  Investments  have been entered  into,  that
consents  needed for the Exchange have been or will be obtained,  that the Orion
Newco  formation  conditions  have been  satisfied,  that the Merger  will occur
concurrently with the Exchange if ratified by Orion  stockholders at the Special
Meeting and that all  required  opinions  from Ernst & Young LLP, tax advisor to
Orion, have been or will be obtained.


                                       43

<PAGE>
CERTAIN PROVISIONS OF THE EXCHANGE AGREEMENT

   The Exchange Agreement contains a number of  representations,  warranties and
indemnities by Orion and the Exchanging Partners.

   o Representations and Warranties.  Among other things, each of the Exchanging
Partners  has  severally  represented  and  warranted  to Orion  that:  (i) such
Exchanging Partner is, and on the date of the Exchange will be, the lawful owner
of the  limited  partnership  interest  in  Orion  Atlantic  of such  Exchanging
Partner,  (ii) such  Exchanging  Partner has full right and lawful  authority to
transfer the limited  partnership  interest in Orion Atlantic of such Exchanging
Partner  pursuant  to the  Exchange  Agreement,  (iii)  the  Exchange  Agreement
constitutes  a  valid  and  binding  obligation  of  such  Exchanging   Partner,
enforceable  in  accordance  with its terms,  (iv) on the date of the  Exchange,
Orion will acquire good, valid and marketable title to such Exchanging Partner's
limited partnership interests in Orion Atlantic,  (v) such Exchanging Partner is
an  "accredited  investor"  within the meaning of Rule 501 under the  Securities
Act,  (vi) the Orion  Newco  Series C  Preferred  Stock  being  acquired by such
Exchanging  Partner  pursuant to the Exchange  Agreement is for its own account,
for investment and not with a view toward distribution within the meaning of the
Securities Act (subject to the ability of certain of the Exchanging  Partners to
transfer  a portion  of their  Orion  Newco  Series C  Preferred  Stock to other
Exchanging  Partners)  and  (vii)  such  Exchanging  Partner  has at the time of
execution of the Exchange Agreement,  and at the time of the Exchange will have,
no present plan or  intention  to sell or  otherwise  dispose of the Orion Newco
Series C Preferred  Stock being  acquired  under the  Exchange  Agreement or any
Orion Newco Common Stock issuable upon the conversion of such Orion Newco Series
C Preferred Stock.

   Among other things,  Orion has  represented  and warranted to the  Exchanging
Partners that: (i) Orion is a corporation  duly organized,  validly existing and
in good  standing  under the laws of the State of Delaware,  has full  corporate
power and authority to carry on its business as currently conducted, and has the
full legal right,  capacity,  power and  authority  (corporate  or otherwise) to
execute and deliver the  Exchange  Agreement  and  consummate  the  transactions
contemplated  thereby,  (ii)  the  Exchange  Agreement   constitutes,   and  the
Registration Rights Agreement (as defined below) when executed,  will constitute
a valid  and  binding  obligation  of Orion  and  Orion  Newco,  enforceable  in
accordance  with its terms,  and that each  document  to be executed by Orion or
Orion Newco pursuant to the Exchange  Agreement,  when executed and delivered in
accordance with the provisions  thereof,  will be a valid and binding obligation
of Orion or Orion Newco,  enforceable in accordance  with its terms,  (iii) upon
consummation of the transactions  contemplated by the Exchange  Agreement at the
closing of the Exchange Agreement, the Orion Newco Series C Preferred Stock will
be duly and  validly  issued,  fully  paid  and  nonassessable  and no  personal
liability will attach to the ownership thereof, and the Exchanging Partners will
acquire  the  legal,  valid and  marketable  title to the Orion  Newco  Series C
Preferred Stock, (iv) except as set forth in the consolidated  audited financial
statements  of Orion as of December 31,  1995,  and for the period ended on such
date,  or  included  in certain  disclosure  materials,  there exist no material
liabilities  (whether  contingent or absolute,  matured or  unmatured,  known or
unknown) of Orion or any  subsidiary of Orion and (v)  immediately  prior to the
date of the  Exchange,  Orion  Newco  will have no  liabilities  (other  than de
minimis  liabilities  relating to Orion Newco's  formation,  any  liabilities or
obligations  relating to the Exchange Agreement and any liabilities for expenses
relating to the transactions contemplated by the Exchange Agreement). Orion also
has made several representations regarding tax filings and payments, maintenance
of account books,  litigation,  filings with the Commission,  transactions  with
Exchanging Partners and the absence of certain  violations.  The representations
and  warranties of the Exchanging  Partners and Orion  contained in the Exchange
Agreement  survive  the date of the  Exchange  and any  investigation,  audit or
inspection at any time made by or on behalf of any party thereto.

   o Covenants.  The Exchange  Agreement  contains a number of covenants whereby
Orion and OrionSat,  jointly and severally on the one hand,  and the  Exchanging
Partners,  severally and not jointly on the other hand,  covenant and agree with
each other,  among other  things,  that:  (i) Orion and OrionSat  shall take all
measures   reasonably   necessary  or   advisable   to  secure  such   consents,

                                       44

<PAGE>
authorizations and approvals of governmental  authorities and of private persons
or  entities  with  respect to the  transactions  contemplated  by the  Exchange
Agreement,  and  the  performance  of  all  other  obligations  of  the  parties
thereunder,  as may be required by any  applicable  statute or regulation of the
United States or any country, state or other jurisdiction or by any agreement of
any kind  whatsoever  to which any of them is a party or by which any of them is
bound and which are set forth in a  schedule  to the  Exchange  Agreement,  (ii)
subject  to certain  provisions  of the  Exchange  Agreement,  OrionSat  and the
Exchanging Partners shall take all measures reasonably necessary or advisable to
secure such consents,  authorizations and approvals of governmental  authorities
and of private persons or entities with respect to the transactions contemplated
by the Exchange  Agreement,  and to the performance of all other  obligations of
such  parties  thereunder,  as may be  required  by any  applicable  statute  or
regulation of the United States or any country,  state or other  jurisdiction or
by any  agreement of any kind  whatsoever  to which any of them is a party or by
which any of them is bound (Orion, OrionSat and the Exchanging Partners agreeing
to (a)  cooperate  in  the  filing  of all  forms,  notifications,  reports  and
information,  if any,  required  or  reasonably  deemed  advisable  pursuant  to
applicable  statutes,  rules,  regulations  or  orders  of any  governmental  or
supragovernmental  authority in connection with the transactions contemplated by
the Exchange  Agreement and (b) use their respective good faith efforts to cause
any applicable  waiting  periods  thereunder to expire and any objections to the
transactions  contemplated by the Exchange  Agreement to be withdrawn before the
Exchange)  and (iii)  Orion  shall take all  measures  reasonably  necessary  or
advisable  to  secure  all  required  consents  of  the  stockholders  of  Orion
(including  the  consent  of  holders of Orion  Senior  Preferred  Stock) to the
Merger, the Exchange and any related transactions requiring stockholder consent.

   o Indemnification.  In the Exchange Agreement, Orion and OrionSat have agreed
jointly  and  severally  (and Orion  agrees to bind Orion  Newco  pursuant  to a
separate indemnity agreement) to indemnify, defend and hold harmless each of the
Exchanging Partners and their respective affiliates, employees, representatives,
agents, officers and directors (collectively, the "EP Indemnified Persons") from
and after the date of the  Exchange  against  and in  respect  of all Claims (as
defined in the Exchange Agreement) asserted against,  resulting to, imposed upon
or incurred by any of the EP  Indemnified  Persons  (whether such Claims are by,
against  or  relate  to Orion  Newco,  Orion or  OrionSat  or any  other  party,
including without limitation, a governmental entity), directly or indirectly, by
reason of or resulting  from any of the  following:  (i) any of the matters with
respect to which Orion Newco, Orion and OrionSat would be obligated to indemnify
the EP Indemnified Persons under certain provisions of the Partnership Agreement
or (ii) any  Claims  asserted  by one or more of the  Banks or  Chase,  or their
successors or assigns, arising from and after the date of the Exchange under (x)
any  of the  Capacity  Agreements  or  guarantees  relating  thereto  which  are
terminated on or prior to the date of the Exchange,  (y) any agreements or other
documents  terminated or to be terminated in connection  with the Bank Agreement
Termination  or (z) the Exchange  Agreement,  in each case  excluding any Claims
arising  from or  relating  to any breach of any  representation  of warranty or
noncompliance  with any  condition  or other  agreement  given or made by any EP
Indemnified  Persons under any of the agreements or documents  referred to above
in  this  paragraph  or  any  document  furnished  by or on  behalf  of  any  EP
Indemnified  Person  pursuant  thereto.  The obligation and liabilities of Orion
Newco, Orion and OrionSat with respect to their respective  indemnities pursuant
to the Exchange  Agreement are subject to certain conditions as set forth in the
Exchange Agreement.

CLOSING OF THE EXCHANGE; AMENDMENT AND TERMINATION OF THE EXCHANGE AGREEMENT


   If the Merger  Agreement  is ratified by Orion's  stockholders  and the other
conditions to completion of the Exchange are satisfied, the Exchange is to occur
at a time and  date  proposed  by  Orion  not  more  than  ten  days  after  the
satisfaction  or waiver of all  conditions to  completion  of the  Exchange.  No
amendment or  modification  of the Exchange  Agreement  will be valid or binding
unless set forth in writing and duly executed and delivered by the party against
whom  enforcement  of the  amendment  or  modification  is sought.  The Exchange
Agreement may be  terminated  at any time before the Exchange  takes place under
various circumstances,  principally the failure to meet all of the conditions to
completion  of the Exchange by a 
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<PAGE>
specified date (which is currently April 30, 1997), if either Orion and OrionSat
or the Exchanging Partners  collectively (as to all Exchanging  Partners) or one
or more Exchanging  Partners (as to such Exchanging  Partners only) give written
notice of termination to the other parties to the Exchange Agreement;  provided,
however,  that the  terminating  party is not in  breach of any  obligations  or
agreements  under the Exchange  Agreement that are causing any of the conditions
precedent  to the  Exchange  not to be  satisfied.  In the  event  the  Exchange
Agreement  is  terminated  (other  than  as to  less  than  all  the  Exchanging
Partners), the Exchange Agreement shall become wholly void and of no effect, and
the parties shall be released from all future obligations thereunder, subject to
certain provisions relating to confidentiality and the payment of expenses which
will remain in effect.

CLOSING AFTER JANUARY 30, 1997

   If the Exchange closes after January 30, 1997,  Orion Newco will be obligated
to make cash refunds,  on or shortly after the closing date, of payments made by
the  Exchanging  Partners  after  that date  under  the Orion 1 Credit  Facility
Support; if Orion Newco does not have sufficient cash to make such refunds,  the
refunds will be made in shares of Orion Newco Series C Preferred  Stock, and the
number of shares issued in the Exchange will increase. The determination whether
Orion  Newco has  sufficient  cash will be made  assuming  proceeds of the Notes
Offering and the Debenture  Investments  are applied to the following  uses: (i)
repayment of the Orion 1 Credit Facility and various other obligations  relating
thereto,  (ii) $49.4  million of initial  payments  under the Orion 2  Satellite
Contract in 1997, (iii) $13 million of incentive payments to Matra Marconi Space
with respect to Orion 1, (iv) $3.5 million of payments to STET upon repayment of
the Orion 1 Credit Facility, (v) an amount for working capital not to exceed $10
million and (vi) certain  other costs and expenses not to exceed $14.3  million.
If the amount of gross proceeds of the Notes Offering is as large or larger than
that presently  anticipated by the Company,  all payments made by the Exchanging
Partners after January 30, 1997 under the Orion 1 Credit  Facility  Support will
be refunded  in cash and the number of shares  issued in the  Exchange  will not
increase. 

ACCOUNTING TREATMENT

   The Exchange will be accounted  for as an  acquisition  of minority  interest
using the purchase method of accounting. As a result, the assets and liabilities
of Orion  Atlantic  will be  revalued to fair value to the extent of the Limited
Partners' interests acquired as a result of the Exchange.

DESCRIPTION OF THE ORION NEWCO SERIES C PREFERRED STOCK

   Pursuant to the Exchange  Agreement,  Orion has agreed that prior to the date
of the  Exchange,  Orion Newco will have filed a  Certificate  of  Designations,
Rights  and  Preferences  of  Series  C  6%  Cumulative  Redeemable  Convertible
Preferred Stock with the State of Delaware (the  "Certificate of  Designations")
establishing  the terms and relative  rights and  preferences of the Orion Newco
Series C Preferred  Stock.  According to the  Certificate of  Designations,  the
terms of the Orion Newco Series C Preferred Stock are as follows:

   Dividends.  Subject  to the  preferential  rights of Orion  Newco's  Series A
Preferred Stock and Orion Newco's Series B Preferred Stock ranking senior to the
Orion Newco Series C Preferred Stock, the record holders of Orion Newco Series C
Preferred  Stock will be  entitled  to receive  dividends  at the rate of 6% per
annum,  payable  exclusively  (except in the event of a Liquidation,  as defined
below) in Orion  Newco  Common  Stock.  Dividends  will  accrue on a daily basis
commencing  on the  date of  issuance  of each  share of  Orion  Newco  Series C
Preferred  Stock at the simple  interest  rate of 6% per annum of the $1,000 per
share  value  thereof.  The  number  of  shares  of  Orion  Newco  Common  Stock
distributable  in a dividend  on each share of Orion  Newco  Series C  Preferred
Stock is  calculated  based on the market  price of such  stock  under a formula
provided in the Certificate of Designations.

   Liquidation  rights.  Subject  to the  liquidation  rights  contained  in the
Certificate of Designations, Rights and Preferences for the Orion Newco Series A
Preferred Stock and the Certificate of Designations,  Rights and Preferences for
the Orion  Newco  Series B  Preferred  Stock,  in the event of any  liqui-


                                       46

<PAGE>

dation, dissolution or winding up of Orion Newco (a "Liquidation"),  each holder
of Orion Newco Series C Preferred Stock will be entitled to be paid,  before any
distribution  or payment is made upon the Orion Newco  Common Stock or any other
series or class of stock of Orion Newco ranking junior to the Orion Newco Series
C  Preferred  Stock,  an amount in cash  equal to the  greater of (a) $1,000 per
share (plus an amount equal to all accrued and unpaid  dividends)  of all shares
of Orion Newco  Series C  Preferred  Stock held by such holder or (b) the amount
which would be  distributed  with  respect to the shares of Orion  Newco  Common
Stock (including  fractional shares for purposes of this calculation) into which
such shares of Orion Newco Series C Preferred  Stock are  convertible  (assuming
conversion of all outstanding Orion Newco Series C Preferred Stock)  immediately
prior to the record date for such  distribution  (or, if there is no such record
date, then the date as of which the holders of Orion Newco Common Stock entitled
to such  distribution are  determined),  and the holders of Orion Newco Series C
Preferred Stock shall not be entitled to any further  payment.  If upon any such
Liquidation  Orion  Newco's  assets to be  distributed  among the holders of the
Orion Newco Series C Preferred Stock are  insufficient to permit payment to such
holders of the  aggregate  amount which they are  entitled to be paid,  then the
entire assets to be distributed shall be distributed  ratably among such holders
based upon a value of $1,000 per share (plus all  accrued and unpaid  dividends)
of the Orion Newco Series C Preferred Stock held by each such holder.

   Voting rights.  The holders of the Orion Newco Series C Preferred  Stock will
be entitled to notice of all  stockholders'  meetings in  accordance  with Orion
Newco's  bylaws,  and except as  otherwise  required by law,  the holders of the
Orion  Newco  Series C  Preferred  Stock will be entitled to vote on all matters
submitted  to the  stockholders  for a vote  together  with the holders of Orion
Newco Common Stock and the holders of Orion Newco Senior Preferred Stock, voting
together  as a single  class.  Each share of Orion  Newco  Common  Stock will be
entitled  to one vote  per  share  and each  share  of the  Orion  Newco  Senior
Preferred Stock and Orion Newco Series C Preferred Stock  (including  fractional
shares)  will be entitled to one vote for each whole share of Orion Newco Common
Stock that would be issuable upon conversion of such share of Orion Newco Senior
Preferred Stock and Orion Newco Series C Preferred Stock,  respectively,  at the
time the vote is taken.

   Redemption.  Orion  Newco will be  required  to redeem all of the Orion Newco
Series  C  Preferred  Stock  on  the  25th   anniversary  of  issuance   (2022).
Additionally,  at any  time  after  the  second  anniversary  of the date of the
issuance  of the  Orion  Newco  Series C  Preferred  Stock  under  the  Exchange
Agreement,  or, if prior to such date,  immediately prior to the consummation of
any  consolidation,  merger or sale in which the successor  entity or purchasing
entity is other than Orion Newco,  Orion Newco,  at its option and to the extent
it has funds legally sufficient  therefor,  may redeem the shares of Orion Newco
Series C Preferred Stock then outstanding, in whole or in part, for an aggregate
redemption  price of $1,000 per share  (plus all  accrued  and unpaid  dividends
thereon); provided that, in the event of a partial redemption,  Orion Newco must
redeem the shares of Orion Newco Series C Preferred Stock on a pro rata basis.

   Optional  Conversion  to  Common  Stock.  Holders  of  Orion  Newco  Series C
Preferred Stock will have the right, at any time, to convert all or a portion of
such shares into a number of shares of Orion Newco Common Stock equal to the sum
of: (a) the number of shares of Orion Newco Common Stock computed by multiplying
the number of shares of Orion Newco Series C Preferred  Stock to be converted by
$1,000, and dividing the result by the applicable Conversion Price (as such term
is used in the  Certificate  of  Designations),  initially  $17.50,  subject  to
adjustment, plus (b) the number of shares of Orion Newco Common Stock that would
be payable if all accrued but unpaid  dividends  were  declared  and paid on the
shares of Orion Newco Series C Preferred Stock to be converted.

   Mandatory Conversion to Common Stock. If the closing price of the Orion Newco
Common  Stock over 20 of the 30 prior  trading  days is greater than or equal to
the Conversion Price of $17.50 (subject to adjustment), Orion Newco may require,
by written  notice to all holders of Orion Newco Series C Preferred  Stock,  the
conversion of all of the outstanding Orion Newco Series C Preferred Stock into a
number of shares of Orion Newco Common Stock equal to the sum of: (a) the number
of shares of Orion Newco  Common  Stock  computed by  multiplying  the number of
shares of Orion Newco Series C Preferred  Stock to be  converted by $1,000,  and
dividing the result by the applicable  Conversion Price then in effect, plus (b)
the number of shares of Orion  Newco  Common  Stock that would be payable if all


                                       47

<PAGE>
accrued but unpaid dividends were declared and paid on the shares of Orion Newco
Series C  Preferred  Stock to be  converted.  If Orion  Newco will  require  the
mandatory  conversion  of the Orion Newco  Series C Preferred  Stock  within two
years from the initial  date of  issuance of the Orion Newco  Series C Preferred
Stock,  then the  number of shares of Orion  Newco  Common  Stock into which the
shares of Orion Newco Series C Preferred  Stock are converted  will be increased
by the  number of shares of Orion  Newco  Common  Stock that would be payable if
Orion  Newco were  immediately  to  declare  and pay all  dividends  that in the
absence of conversion  would have accrued on such shares of Orion Newco Series C
Preferred Stock over the six-month period immediately following the date of such
mandatory conversion; provided, however, that the total dividends, including any
additional  amounts  in  respect of  dividends  paid as a result of a  mandatory
conversion,  will not be less  than the  amount of  dividends  that  would  have
accrued on all  outstanding  shares of the Orion Newco Series C Preferred  Stock
during one full year following the date of issuance.

   For  more  information  regarding  the  terms  of the  Orion  Newco  Series C
Preferred  Stock,  stockholders  are referred to the text of the  Certificate of
Designations,  the form of which is attached to this Proxy  Statement/Prospectus
as Attachment C. 

REGISTRATION RIGHTS

   The shares of Orion Newco Series C Preferred  Stock are not registered  under
the  Securities  Act and are  being  issued  by Orion  Newco in  reliance  on an
exemption from registration.  Such shares will be deemed "restricted securities"
within the meaning of Rule 144 under the  Securities  Act and may not be sold in
the absence of  registration  under the  Securities  Act unless an  exemption is
available. Concurrently with the Exchange, Orion, Orion Newco and the Exchanging
Partners will enter into a  registration  rights  agreement  (the  "Registration
Rights  Agreement"),  which is made in connection with, and conditioned upon the
consummation  of,  among other  things,  the Merger and the  Exchange.  Further,
pursuant to the Registration  Rights Agreement,  Orion has agreed to cause Orion
Newco to  execute  and  deliver  the  Registration  Rights  Agreement  or a copy
thereof,  at which time  Orion  Newco  will  become a party to the  Registration
Rights  Agreement  and be bound (and have all rights and  obligations  of Orion)
thereunder. In the Registration Rights Agreement, Orion Newco will grant certain
registration rights to the Exchanging Partners, as summarized below.

   Shelf  Registration  Rights.  Pursuant to the Registration  Rights Agreement,
Orion Newco will prepare and as soon as  practicable  (but no later than 15 days
after)  after 180 days have  passed from the date of issuance of the Orion Newco
Series C Preferred Stock (the "Lockup Period"), a "shelf" registration statement
of Orion Newco (the "Initial  Shelf  Registration  Statement")  which covers the
registration  of any and all the  Eligible  Registrable  Securities  (as defined
below)  each  holder  elects  to  include  in  the  Initial  Shelf  Registration
Statement.  Orion Newco will include in the Initial Shelf Registration Statement
all Eligible Registrable Securities,  other than Eligible Registrable Securities
as to which a holder  advises Orion Newco in writing,  at least 15 days prior to
the  expiration  of the Lockup  Period,  that such  holder does not wish to have
included in the Initial Shelf Registration.  Orion Newco will use all reasonable
efforts to have the Initial Shelf  Registration  Statement declared effective by
the  Commission  as soon as  practicable  after  filing.  "Eligible  Registrable
Securities"  includes  the  shares  of the  Orion  Newco  Common  Stock or other
securities  issued or  issuable  upon  conversion  of the Orion  Newco  Series C
Preferred  Stock purchased by the Exchanging  Partners  pursuant to the Exchange
Agreement or issued as dividends or distributions pursuant to the Certificate of
Designations that a holder is eligible to sell under the terms of the applicable
Transfer   Restriction   Agreement   described  below  under  "Certain  Transfer
Restrictions"  (which  constitute 25% of the aggregate number of shares of Orion
Newco  Common  Stock  issuable  upon  conversion  of the  Orion  Newco  Series C
Preferred  Stock received by such  Exchanging  Partner  pursuant to the Exchange
Agreement or as dividends  on such Orion Newco Series C Preferred  Stock).  Such
securities shall cease to be Eligible Registrable Securities when a registration
statement with respect to the  registration of such  securities  shall have been
declared  effective under the Securities Act and such securities shall have been
disposed of pursuant to such registration statement.

   Under the Registration Rights Agreement,  Orion Newco will use all reasonable
efforts to cause to be filed,  during each successive period of not less than 60
and not  more  than  90 days  (as  determined  by  Orion  Newco,  having  regard
principally to coordination of such  registration  with ongoing business mat-
                                       48

<PAGE>
ters and disclosure  requirements)  following the  effectiveness  of the Initial
Registration  Statement  which  terminates on or before the end of the date five
years  following  the  date  of the  Exchange  (each,  a  "Top-up  Period"),  an
additional  shelf  registration   statement  or,  at  Orion  Newco's  option,  a
post-effective  amendment to any then-effective shelf registration  statement (a
"Top-up Shelf  Registration  Statement")  providing for the  registration of the
shares of the Eligible  Registrable  Securities  that each holder of Orion Newco
Series C Preferred  Stock  elects to include in such Top-up  Shelf  Registration
Statement which have not been registered previously.  Orion Newco is required to
use all reasonable  efforts to have the Top-up  Registration  Statement declared
effective by the Commission as soon as practicable after filing.

   Demand  Registration  of  Underwritten  Offerings.  At any time following the
expiration of the Lockup  Period,  one or more of the holders of the Orion Newco
Series C Preferred  Stock may request  that Orion  Newco  effect a  registration
under the Securities Act of all of their  Eligible  Registrable  Securities in a
sale  of  securities  to  an  underwriter  or  underwriters  of  securities  for
reoffering  to the public (an  "Underwritten  Offering").  Each such request for
registration  must involve  shares worth at least $17.5 million in market value.
Each request for an Underwritten Offering will specify the approximate number of
shares of Eligible  Registrable  Securities  requested to be registered  and the
anticipated  per share  price  range for such  offering.  Within  ten days after
receipt  of any such  request,  Orion  Newco  will give  written  notice of such
requested  demand  registration to all other holders of the Orion Newco Series C
Preferred  Stock  and,   subject  to  certain   restrictions   detailed  in  the
Registration  Rights Agreement,  will include in any such Underwritten  Offering
all  Eligible  Registrable  Securities  with  respect to which  Orion  Newco has
received  written  request  for  inclusion  therein  within 15 days after  Orion
Newco's notice is given.

   Piggyback Registration Rights. If at any time following the expiration of the
Lockup Period,  Orion Newco proposes to effect a registration of the Orion Newco
Common Stock  (whether  for its own account or for the account of others)  under
the Securities Act, other than a shelf or demand registration as described above
or a  registration  of securities in connection  with a business  acquisition or
combination  or an employee  benefit plan (a  "Piggyback  Registration"),  Orion
Newco will give written  notice to all holders of its intention to effect such a
registration  and, subject to certain  provisions  described in the Registration
Rights  Agreement,  will include in such  registration all Eligible  Registrable
Securities with respect to which Orion Newco has received  written  requests for
inclusion  therein  within 15 days after the date Orion Newco's notice is given.
Orion Newco will pay any and all Registration  Expenses (as such term is used in
the  Registration  Rights  Agreement)  incident  to  the  filing  of  each  such
registration statement or otherwise incident to the performance of or compliance
by Orion Newco with the provisions of the Registration Rights Agreement relating
to a such registration. 

CERTAIN TRANSFER RESTRICTIONS


   Each  Exchanging  Partner  will enter into a Transfer  Restriction  Agreement
(each, a "Transfer Restriction  Agreement") regarding the transfer of the shares
of Orion Newco Common Stock issuable upon conversion of, or as dividends on, the
Orion  Newco  Series C Preferred  Stock.  Pursuant  to the  applicable  Transfer
Restriction  Agreement,  each Exchanging  Partner may not directly or indirectly
sell, offer,  contract to sell, make any short sale, pledge or otherwise dispose
of ("transfer") any shares of Orion Newco Common Stock issued upon conversion of
shares of Orion Newco  Series C Preferred  Stock or as  dividends  on such Orion
Newco Series C Preferred Stock (the "Affected Shares") without the prior written
consent of Orion Newco during the Lockup Period, unless such sale or transfer is
to an "affiliate" (as such term is defined in Rule 144 under the Securities Act)
of the Exchanging  Partner and does not involve a public  distribution or public
offering or unless any transfer is effected (i) pursuant to a tender or exchange
offer made by or on behalf of Orion Newco or a third party,  (ii) in  connection
with a merger, consolidation, sale of all or substantially of all of the assets,
recapitalization or similar transaction  involving Orion Newco or (iii) pursuant
to a transaction  not  involving a public  distribution  or offering  registered
under the Securities Act and not made through a broker,  dealer or  market-maker
pursuant  to Rule  144  (including  a  pledge  that  meets  such  requirements);
provided,  however,  that prior to any transfer of Affected  Shares under clause
(iii) above and prior to any  transfer of Orion Newco  Series C Preferred  Stock
(other than under the  circumstances  set forth in clause (i) or (ii) above, the
transferee  shall  execute  and  deliver to Orion  Newco a transfer  restriction
agreement  substantially  simi-

                                       49

<PAGE>
lar to the Transfer Restriction Agreement the transferor originally entered into
and otherwise  reasonably  satisfactory in form and substance to Orion Newco, in
which such transferee  agrees to abide by all of the  restrictions  set forth in
the original Transfer Restriction Agreement.

   Also,  pursuant  to  the  applicable  Transfer  Restriction  Agreement,  each
Exchanging  Partner  agrees that it will not transfer  during any 90-day  period
Affected  Shares  that  collectively  represent  more than 25% of the  aggregate
number of shares of Orion Newco Common Stock  issuable  upon  conversion  of the
Orion  Newco  Series C  Preferred  Stock  received  by such  Exchanging  Partner
pursuant to the Exchange  Agreement or as dividends on such Orion Newco Series C
Preferred Stock (the "25% Limit") unless any such transfer is (i) pursuant to an
underwritten,  public  offering  pursuant to a registration  statement under the
Securities Act, (ii) pursuant to a tender or exchange offer made by or on behalf
of  Orion  Newco  or  a  third  party,   (iii)  in  connection  with  a  merger,
consolidation,  sale of all or substantially all of the assets, recapitalization
or similar  transaction  involving Orion Newco or (iv) pursuant to a transaction
not involving a public  distribution or offering registered under the Securities
Act and is not made through a broker,  dealer or  market-maker  pursuant to Rule
144 (including a pledge that meets such requirements);  provided,  however, that
prior to any  transfer of Affected  Shares  under clause (iv) above and prior to
any  transfer  of Orion  Newco  Series C  Preferred  Stock  other than under the
circumstances set forth in clause (i), (ii) or (iii) above, the transferee shall
execute   and  deliver  to  Orion   Newco  a  transfer   restriction   agreement
substantially  similar to the  Transfer  Restriction  Agreement  the  transferor
originally  entered into (omitting the Lockup Period provision noted above). The
25% Limit  described  above will  terminate on the date that is five years after
the date of  issuance  of the Orion  Newco  Series C  Preferred  Stock under the
Exchange Agreement. 

THE DEBENTURE INVESTMENTS


   The Debenture Investments will involve the sale of $50 million of convertible
junior  subordinated  debentures (the  "Debentures")  to British  Aerospace (the
"British  Aerospace  Investment")  and  the  sale  of  $10  million  of  similar
Debentures to Matra Marconi Space (the "Matra Marconi Investment"). Consummation
of the  Debenture  Investments  is a  condition  to  the  closing  of the  Notes
Offering.

   Terms of Debentures. Under the Debenture Agreement among Orion Newco, British
Aerospace and Matra Marconi Space, the Debentures will mature 15 years following
the date of issuance  and will bear  interest at a rate of 8.75% per annum to be
paid semi-annually in arrears,  commencing August 1, 1997, solely in Orion Newco
Common  Stock at prices  between  $10.21 and $14.00 per share,  depending on the
average  trading  prices of the Orion Newco Common  Stock during the  applicable
measurement  periods.  The Debentures  (and accrued but unpaid  interest) may be
converted  in whole or in part into Orion Newco  Common  Stock at any time at an
initial  conversion  rate of $14.00 per share,  as adjusted  for stock splits or
other  recapitalizations,  certain  dividends  or  issuances  of  stock  to  all
stockholders,  issuances  of stock (or rights to  acquire  stock) at a price per
share below  $14.00,  and other events.  See "Risk Factors -- Risks  Relating to
Merger,  Exchange and  Debenture  Investments  -- Risks  Relating to Orion Newco
Series C Preferred Stock and Debentures."

   Orion Newco may at any time (except during 90 days after a change in control)
redeem all or part (but not less than 25% on any one occasion) of the Debentures
for cash  consideration  determined by multiplying the number of shares of Orion
Newco Common Stock issuable upon  conversion of the Debentures by the greater of
(i) the  average  closing  price of the Orion  Newco  Common  Stock  over the 20
trading days preceding the  redemption or (ii) $17.50 per share.  Alternatively,
Orion  Newco has the right to arrange  for the  disposition  of the Orion  Newco
Common Stock issuable upon the conversion of, or as payment of dividends on, the
Debentures in a public or private offering. In such event, the Debenture holders
will be  entitled  to receive a price per share  equal to the  greater of (a) at
least 95% of the average  closing price of the Orion Newco Common Stock over the
20 trading days  preceding  the  disposition  or (b) $17.50 per share.  From and
after the time when less than $50 million of Notes  remain  outstanding,  in the
event of a change of control of Orion Newco  (defined as the  acquisition by any
stockholder of a majority of the voting securities of Orion Newco), either Orion
Newco or any holder of the Debentures  may,  within 90 days after such change of
control,  require  the sale of the  Debentures,  as  converted  into Orion Newco
Common  Stock,  to Orion Newco for a purchase  price equal to the greater 
                                       50

<PAGE>
of (a) the price payable in an optional  redemption (as described above) and (b)
the price paid to holders of Orion Newco  Common  Stock in the change of control
transaction.

   The Debentures will be subordinated to all other indebtedness of the Company,
including the Notes. The Debentures will contain minimal covenants and events of
default so long as $50 million or more of the Notes remain outstanding, but more
extensive covenants and events of default will apply after less than $50 million
of  Notes  are  outstanding.   See  "The  Related   Transactions  --  The  Notes
Offering/Orion 1 Credit Facility Refinancing -- Notes Offering."

   In connection with the Debenture  Investments,  Orion Newco has agreed in the
Debenture Agreement to certain provisions  relating to any mandatory  redemption
by it of the  Debentures,  the Orion Newco Series C Preferred Stock or the Orion
Newco Common Stock issued to British  Aerospace,  Matra  Marconi  Space or their
respective  affiliates  upon  conversion  of the  Debentures  or the Orion Newco
Series  C  Preferred  Stock or as  payment  of  interest  on the  Debentures  or
dividends on the Orion Newco Series C Preferred Stock.  Under its Certificate of
Incorporation, Orion Newco has the right mandatorily to redeem the capital stock
of any  stockholder  if the  ownership  of such stock would cause Orion Newco to
violate  applicable U.S.  regulatory  restrictions on foreign  ownership.  Orion
Newco has agreed that any such redemption of the foregoing  securities  owned by
British  Aerospace,  Matra Marconi Space or their respective  affiliates will be
effected at the price and on the terms applicable to redemptions  effected under
the terms of the Debentures or the Orion Newco Series C Preferred  Stock, as the
case may be,  which would be more  favorable  than the price and other terms set
forth in the Certificate of Incorporation. Approval of the Debenture Investments
by Orion  stockholders  also will constitute  approval of such provisions in the
Debenture Agreement.

   The  consummation  of the  Debenture  Investments  is  conditioned  upon  the
following:  (i) completion of the Exchange;  (ii) termination of all obligations
of British Aerospace,  Matra Marconi Space and their respective affiliates under
the  Orion 1 Credit  Facility  Support;  (iii)  receipt  by  Orion  Newco of net
proceeds from the Notes  Offering of at least $225  million;  (iv) Orion Newco's
payment to each of British  Aerospace  and Matra  Marconi Space of its costs and
expenses;  and (v)  acquisition  by Orion  Newco of all of  British  Aerospace's
interest in Orion Asia Pacific in exchange for  approximately  86,000  shares of
Orion Newco Common Stock.

   Matra Marconi will apply certain  satellite  incentive  payments  owing to it
toward  the  purchase  price of the  Debentures.  Under  the  Orion 1  Satellite
Contract,  Matra Marconi,  as the Orion 1  manufacturer,  is entitled to receive
incentive  payments  based  upon  the  performance  of Orion 1 in  orbit.  As of
September 30, 1996, Orion Atlantic had obligations with a present value of $21.7
million with respect to incentive payments.  Orion Newco will pay $13 million in
satellite incentives  following  completion of the Notes Offering,  of which $10
million will be re-invested in Orion Newco by Matra Marconi Space in Debentures.

   REGISTRATION  RIGHTS.  The shares of Orion Newco Common Stock  issuable  upon
conversion  of, or as  dividends  on,  the  Debentures  will have the  following
registration rights:

   Orion  Newco  will  be  obligated  to  include  in the  "shelf"  registration
statement  filed with respect to the Orion Newco Series C Preferred Stock (to be
filed approximately six months after such stock is issued) approximately 360,000
shares  of Orion  Newco  Common  Stock  issued as  payment  of  interest  on the
Debentures or previously  issued to British  Aerospace  pursuant to a warrant or
the OAP  Acquisition.  Orion Newco also will prepare and,  within one year after
the date of issuance of the Debentures,  cause to be filed a shelf  registration
statement of Orion Newco which covers the  registration of any and all shares of
Orion Newco Common Stock issuable upon  conversion of the Debentures each holder
elects to  include in such shelf  registration  statement.  If not all shares of
Orion  Newco  Common  Stock  issuable  upon  conversion  of the  Debentures  are
registered  in the initial  shelf  registration  statement,  Orion Newco will be
obligated to file  additional  shelf  registration  statements  to register such
unregistered shares.

   Any one or more holders of the Debentures may request that Orion Newco effect
a registration under the Securities Act of all or not less $20 million of shares
of Orion Newco Common Stock  issuable upon  conversion  of the  Debentures in an
underwritten  offering.  The number of requests is not limited,  but the Company
will not be  obligated  to effect  more than one  underwritten  offering  in any
12-month 

                                       51

<PAGE>
period. Orion Newco will pay any and all Registration  Expenses (as such term is
used in the  registration  rights  agreement)  incident  to the  filing  of each
registration statement for an underwritten offering.

   If Orion Newco  proposes to effect a  registration  of the Orion Newco Common
Stock  (whether  for its own  account or for the  account  of others)  under the
Securities Act, other than a shelf or demand  registration as described above or
a  registration  of  securities  in connection  with a business  acquisition  or
combination or an employee  benefit plan,  Orion Newco will,  subject to certain
provisions  described  in the  registration  rights  agreement,  include in such
registration  all shares of Orion Newco Common Stock issuable upon conversion of
the Debentures with respect to which Orion Newco has received  written  requests
for inclusion  therein.  Orion Newco will pay any and all Registration  Expenses
(as such term is used in the  registration  rights  agreement)  incident  to the
filing  of  each  such  registration  statement  or  otherwise  incident  to the
performance  of or  compliance  by  Orion  Newco  with  the  provisions  of  the
registration rights agreement relating to a such registration.

                                       52
<PAGE>

CORPORATE STRUCTURE AFTER THE TRANSACTIONS

   The following diagram illustrates the effects of the Merger, the Exchange and
the other Transactions on the corporate  structure of Orion Newco. The ownership
figures are on a fully diluted basis.

                                  [DIAGRAM]



                                       53
<PAGE>

EFFECT OF THE EXCHANGE ON THE CAPITAL STRUCTURE OF ORION NEWCO


   As a result  of the  issuance  of  121,988  shares  of Orion  Newco  Series C
Preferred  Stock  in the  Exchange,  which  is  convertible  into  approximately
6,970,740  shares of Orion  Newco  Common  Stock,  the number of shares of Orion
Newco  Common  Stock  outstanding  on a fully  diluted  basis will  increase  by
approximately 78% to approximately  25,860,320 shares. In addition,  as a result
of  the  issuance,   certain  of  the  Exchanging  Partners  will  be  principal
stockholders  of Orion Newco.  See  "Security  Ownership  of Certain  Beneficial
Owners Prior to and Following the Transactions" below.


RECOMMENDATION OF THE BOARD OF DIRECTORS OF ORION


   The Board of Directors unanimously approved (with the British Aerospace Board
representative recusing himself) the terms of the Merger Agreement, the Exchange
Agreement  and the  Debenture  Agreement  and  determined  that the Merger,  the
Exchange and the Debenture  Investments  are in the best  interests of Orion and
its stockholders.  The Board unanimously  recommends (with the British Aerospace
Board  representative   recusing  himself)  that  Orion  stockholders  vote  FOR
ratification of the Merger Agreement and the transactions  contemplated thereby,
FOR  approval  and  adoption  of the  Exchange  Agreement  and the  transactions
contemplated thereby, and FOR approval of the Debenture  Investments.  The Board
believes that the Merger  Transactions and the Debenture  Investments are in the
best  interests  of  Orion  stockholders  because  they  will  simplify  Orion's
organizational  structure and improve Orion's access to the capital markets. The
reasons  for the  Board's  recommendation  are  discussed  more fully  under the
captions  "Background of the Merger Transactions and the Debenture  Investments"
and "Reasons for the Merger Transactions and the Debenture Investments" above.

OPINION OF ORION'S FINANCIAL ADVISOR

   Salomon  Brothers has rendered to the Board of Directors of Orion its written
opinion dated December 10, 1996 (the "Salomon  Brothers  Opinion")  that,  based
upon and subject to the various  considerations set forth in the opinion,  as of
December 10, 1996, the  consideration to be paid by Orion in connection with the
Exchange was fair from a financial point of view to Orion.  No limitations  were
imposed by the Board of  Directors  upon  Salomon  Brothers  with respect to the
investigations  made or the procedures  followed by it in rendering its opinion.
Salomon  Brothers  was not  requested  by the  Board  of  Directors  to make any
recommendation  as to the form or  amount of  consideration  to be paid by Orion
pursuant to the Exchange  Agreement,  which issues were resolved in arm's-length
negotiations between Orion and the Exchanging Partners. Salomon Brothers was not
asked to express an opinion, and did not express any opinion, with regard to the
Notes Offering, the Orion 1 Credit Refinancing,  the Debenture Investments,  the
Orion 2 Satellite Contract, the Orion 3 Satellite Contract or the Merger.

   THE FULL TEXT OF THE SALOMON BROTHERS  OPINION,  WHICH SETS FORTH ASSUMPTIONS
MADE, MATTERS  CONSIDERED AND LIMITATIONS ON THE REVIEW UNDERTAKEN,  IS ATTACHED
HERETO AS  ATTACHMENT  D.  STOCKHOLDERS  OF ORION ARE URGED TO READ THE  OPINION
CAREFULLY   AND   IN   ITS   ENTIRETY   IN    CONJUNCTION    WITH   THIS   PROXY
STATEMENT/PROSPECTUS.  THE SALOMON BROTHERS OPINION  ADDRESSES ONLY THE FAIRNESS
OF THE  CONSIDERATION  TO BE PAID IN THE EXCHANGE FROM A FINANCIAL POINT OF VIEW
AND DOES NOT CONSTITUTE A  RECOMMENDATION  TO ANY STOCKHOLDER OF ORION AS TO HOW
SUCH  STOCKHOLDER  SHOULD VOTE ON THE  MERGER,  THE  EXCHANGE  OR THE  DEBENTURE
INVESTMENTS. THE SUMMARY OF THE SALOMON BROTHERS OPINION SET FORTH IN THIS PROXY
STATEMENT/PROSPECTUS  IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE FULL TEXT
OF SUCH OPINION.

   In rendering the Salomon Brothers Opinion,  Salomon Brothers reviewed certain
publicly  available  information  relating  to Orion,  as well as certain  other
information,  including financial  projections,  provided to Salomon Brothers by
Orion,  discussed the past and current  operations  and financial  condition and
prospects  of Orion and Orion  Atlantic  with members of the  respective  senior
managements of such entities and considered  such other  information,  financial
studies,  analyses,  investigations and financial,  economic, market and trading
criteria which Salomon Brothers deemed relevant.

   In  rendering  its  opinion,  Salomon  Brothers  assumed  and relied upon the
accuracy and completeness of the information it reviewed for the purpose of such
opinion and did not assume any  responsibility  for independent  verification of
any of such information or for any independent evaluation or appraisal of

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the  assets  of Orion or Orion  Atlantic.  With  respect  to  Orion's  and Orion
Atlantic's  financial  projections,  Salomon Brothers assumed that they had been
reasonably  prepared on bases reflecting the best currently  available estimates
and judgments of Orion's or Orion Atlantic's management,  as the case may be, as
to the future financial  performance of their respective  businesses,  and while
Salomon  Brothers  expressed no opinion  with  respect to such  forecasts or the
assumptions on which they were based,  Salomon  Brothers  relied on management's
assumption  that  the  Notes  Offering,  the  Orion 1  Credit  Refinancing,  the
Debenture Investments,  the Orion 2 Satellite Contract and the Orion 3 Satellite
Contract would occur or be executed,  each as the case may be, concurrently with
the  Exchange.  Salomon  Brothers  assumed  that the Exchange  would  qualify as
tax-free under Section 351 of the Code.

   The Salomon  Brothers Opinion was necessarily  based on economic,  market and
other  conditions as in effect on, and the information made available to Salomon
Brothers as of, the date of such opinion and did not address Orion's  underlying
business  decision to effect the Exchange or constitute a recommendation  to any
holder  of Orion  Common  Stock  concerning  the  Merger,  the  Exchange  or the
Debenture  Investments.   The  Salomon  Brothers  Opinion  does  not  imply  any
conclusion as to the likely trading range of Orion Newco Common Stock  following
the  consummation  of the  Exchange,  which may vary  depending  on, among other
factors,  changes in interest rates, dividend rates, market conditions,  general
economic  conditions  and other  factors that  generally  influence the price of
securities.

   The  following  is a summary of the report (the  "Salomon  Brothers  Report")
presented by Salomon Brothers to the Board of Directors of Orion on December 10,
1996, in connection with the rendering of the Salomon Brothers Opinion:

   Discounted  Cash  Flow  Analysis.  Using an  unlevered  discounted  cash flow
("DCF") methodology,  Salomon Brothers examined management's 10-year projections
for each of Orion 1, Orion 2 and Orion 3. Salomon  Brothers' DCF analysis relied
on management's  assumption that its business plan would be executed,  including
that the financings  contemplated in such business plan would occur as required.
Salomon Brothers  calculated  terminal values for each such satellite at the end
of the  projection  period,  assuming its  replacement  at the end of its usable
life, by reference to the average tax-effected earnings before interest,  taxes,
depreciation  and  amortization  ("EBITDA")  for  the  last  five-years  of  the
projection  period  less the  average  capital  expenditures  over the life of a
current  specification  satellite.  Salomon  Brothers  then  used  a  cash  flow
perpetuity  approach  and  assumed a steady  nominal  growth  rate of 3-5% and a
discount rate (equal to Salomon  Brothers'  estimate of Orion's weighted average
cost of capital  ("WACC") once Orion's  business  reaches  maturity) of 11.5% to
calculate terminal values. For reference,  Salomon Brothers then converted these
terminal  values to implied ranges of EBITDA  terminal  multiples for Orion 1 of
6.2x to 8.1x, for Orion 2 of 5.7x to 7.5x and for Orion 3 of 5.4x to 7.1x (which
were  at the  low  end of the  range  of  terminal  multiple  estimates  used by
independent  equity  research  analysts  for  satellite  companies  with similar
capital spending characteristics). With respect to projected cash flows over the
projection period, Salomon Brothers used discount rates of 15% to 20% through to
the end of the  projection  period  for Orion 1 and  discount  rates of 17.5% to
22.5% through to the end of the projection period for Orion 2 and Orion 3. These
discount  rates were  selected  primarily  based upon ranges cited for satellite
companies'  WACC in  independent  equity analyst  research  reports for publicly
traded satellite companies.  A higher discount rate was selected for Orion 2 and
Orion 3 because these  satellites  are in an earlier stage of  development  than
Orion 1.  Salomon  Brothers  also  analyzed  the  implied  WACCs  for a group of
publicly traded satellite companies based on their respective capital structures
and equity security trading histories.  However,  due to the limited time period
over which  these  securities  were  traded,  Salomon  Brothers  concluded  that
reliance on this analysis was inappropriate.

   Using its DCF methodology, Salomon Brothers calculated (i) a range of implied
values of $127.2 million to $337.2 million for the Exchanging  Partners'  equity
interest in Orion  Atlantic  and (ii) a range of equity  values for each current
share of Orion Common Stock of $12.79 to $32.37.

   Salomon Brothers also analyzed this DCF valuation in the context of the Orion
Common Stock price as of December 9, 1996, to determine the relationship between
Orion's market  capitalization and the theoretical equity value of Orion derived
from the DCF analysis  described above.  This ratio of market  capitalization to
theoretical equity value ranged from 98.7% (assuming low side DCF value) to

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39% (assuming high side DCF value).  Applying these ratios to Salomon  Brothers'
DCF value range for Orion  Atlantic  yielded a value range of $125.5  million to
$131.5 million for the Exchanging  Partners' 58.3% limited partnership  interest
in Orion Atlantic.

   Precedent  Transaction  Analysis.  As part of its analysis,  Salomon Brothers
reviewed two recent acquisition  transactions involving satellite companies: (i)
Orion Atlantic's  redemption of STET's interest and Orion's subsequent  purchase
of a new  interest  from  Orion  Atlantic  and (ii) the  acquisition  by  Hughes
Corporation  ("Hughes")  of PanAmSat.  To estimate the value of Orion  Atlantic,
Salomon  Brothers  analyzed  the  redemption  of  STET's  interest  and  Orion's
subsequent  purchase of a new interest from Orion  Atlantic to derive a range of
implied  values (i) of Orion  Atlantic of $138.1 million to $180.1 million based
upon  consideration  paid by Orion valued at $11.5  million to $15.0 million for
STET's 8.33% limited partnership  interest and (ii) of the Exchanging  Partners'
limited  partnership  interests in Orion Atlantic of $80 million to $104 million
at the time of the transaction. If the additional capital, totaling $47 million,
invested by the  Exchanging  Partners  since the STET  redemption is included in
this valuation analysis, the range of implied values of the Exchanging Partners'
limited  partnership  interests in Orion  Atlantic  increases to $127 million to
$151 million.

   Salomon  Brothers  also  reviewed  the Hughes  acquisition  of  PanAmSat  and
examined  the ratio of firm  value  (i) to  latest  twelve  months  ("LTM")  and
projected  3-year  forward  revenues,  (ii) to LTM and projected  3-year forward
EBITDA and (iii) to LTM and projected  3-year forward  earnings  before interest
and taxes  ("EBIT").  Based on these ratios and the limited  public  information
available  with  respect to  PanAmSat,  Salomon  Brothers  estimated  a range of
implied  values of the Exchanging  Partners'  limited  partnership  interests in
Orion  Atlantic of $91 million to $420 million.  However,  in Salomon  Brothers'
judgment,  the PanAmSat  transaction was not entirely comparable to the Exchange
in most respects,  primarily because PanAmSat is a less highly leveraged company
than  Orion  and is not in a  similarly  early  stage  of  development.  Salomon
Brothers also reviewed  several other recently  completed merger and acquisition
transactions in the satellite sector, none of which were useful in its analysis.

   Public Market Trading  Analysis.  Salomon Brothers also performed an analysis
in which  it  compared  certain  publicly  available  historical  financial  and
operating data and market statistics of selected satellite companies (calculated
based on closing  stock prices as of December 9, 1996,  for the publicly  traded
companies,  and assuming  the midpoint of the filing range for the  then-pending
initial public offering for APT Satellite  Holdings Limited ("APT  Satellite")).
The  stock  market  performance  of  satellite  companies  varies  significantly
depending on, among other things, stages of development, geographic location and
segments of operation. Accordingly, no company used in the Public Market Trading
Analysis  was  fully  comparable  to Orion in most  material  respects.  Salomon
Brothers  selected  Echostar  Communications   Corporation   ("Echostar"),   APT
Satellite  and  American  Mobile  Satellite  Corporation  ("AMSC")  as the  most
comparable  to Orion.  Although  Echostar and AMSC operate in segments  that are
different from those of Orion, they are each in stages of development similar to
that of Orion. Salomon Brothers examined firm value to LTM revenue multiples for
Echostar (8.7x), APT Satellite (12.0x) and AMSC (21.0x) and noted that, based on
these  multiples,  (i) the total  implied  equity  value of Orion  Atlantic  was
estimated  to range from $120  million to $636  million and (ii) the  Exchanging
Partners'  limited  partnership  interests in Orion  Atlantic were  estimated to
range in value from $70 million to $371 million.

   Historical  Trading  Analysis.  As part  of its  analysis,  Salomon  Brothers
examined  the  historical  stock  market  performance  of Orion in relation to a
composite index of common stock of selected satellite  companies  (consisting of
PanAmSat,   United  States  Satellite  Broadcasting  Company,  Inc.,  Globalstar
Telecommunications  Limited, AMSC, Echostar,  Asia Satellite  Telecommunications
Holdings Limited and P.T.  Pasifik Satellit  Nusantara) and the Nasdaq Composite
Index and the relationship  between price movements thereof over the period from
August 1, 1995 to  December  6, 1996.  Salomon  Brothers  observed  that for the
entire  period  the Orion  Common  Stock  underperformed  the index of  selected
satellite   companies  and  the  Nasdaq   Composite  Index  in  terms  of  price
appreciation.

   Salomon Brothers also noted that Orion's  historical  Common Stock price (and
corresponding firm value) could be deconstructed to estimate the amount of value
historically attributed by the public equity market to Orion Atlantic, using the
simplifying assumption that nominal value was attributed to

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Orion 3. On this basis,  Salomon  Brothers  concluded  that  Orion's  historical
Common  Stock price range of $6.75 to $14.75 per share could be  interpreted  as
implying a market  valuation for the Exchanging  Partners'  limited  partnership
interests in Orion Atlantic of $47.3 million to $219.0 million.

   Convertible  Security  Valuation.   Using  options  pricing  theory  and  the
discounted  present  value  of  probabilistically  adjusted  dividends,  Salomon
Brothers  arrived at a range of values for the Orion  Newco  Series C  Preferred
Stock of $83 million to $106 million. This value was based on a range of assumed
prices for Orion Common Stock of $10 to $14 per share at the time of issuance of
the Orion Newco  Series C Preferred  Stock,  the Orion Newco  Series C Preferred
Stock's  dividend yield,  its conversion  price and liquidation  value,  Orion's
share price  volatility and the mean expected return on Orion Common Stock,  and
reflects the unique  characteristics of the Orion Newco Series C Preferred Stock
which distinguish it from conventional  convertible preferred stocks. Several of
these parameters required Salomon Brothers to make certain subjective judgments.

   The preparation of a fairness  opinion is not susceptible to partial analysis
or summary  description.  Salomon  Brothers  believes  that its analyses and the
summary  set  forth  above  must be  considered  as a whole  and that  selecting
portions of its analyses and the factors  considered by it, without  considering
all such analyses and factors, or of the above summary,  without considering all
factors  and  analyses,  could  create  an  incomplete  view  of  the  processes
underlying  the  analyses  set forth in the  Salomon  Brothers  Opinion  and the
Salomon  Brothers  Report.  Salomon  Brothers has not indicated  that any of the
analyses  which it  performed  had a greater  significance  than any other.  The
ranges of valuations  resulting from any  particular  analysis  described  above
should not be taken to be the view of Salomon  Brothers  of the actual  value of
Orion and Orion  Atlantic.  In performing  its analyses,  Salomon  Brothers made
numerous  assumptions with respect to industry  performance,  general  business,
financial,  market and economic conditions and other matters,  many of which are
beyond the control of Orion or Orion Atlantic. The analyses performed by Salomon
Brothers  are not  necessarily  indicative  of actual  values  or actual  future
results,  which may be  significantly  more or less  favorable than suggested by
such analyses.  Such analyses were prepared solely as part of Salomon  Brothers'
analysis  of the  fairness  to Orion,  from a  financial  point of view,  of the
consideration  to be paid in the  Exchange.  In addition,  analyses  relating to
value of  businesses do not purport to be appraisals or to reflect the prices at
which a business  actually might be sold, or the prices at which a company might
actually be sold, or the prices at which  securities  might trade at the present
time or at any time in the future.

   Salomon Brothers is an  internationally  recognized  investment  banking firm
that provides  financial  services in  connection  with a wide range of business
transactions. As part of its business, Salomon Brothers regularly engages in the
valuation of  companies  and their  securities  in  connection  with mergers and
acquisitions,   negotiated   underwritings,   competitive  biddings,   secondary
distributions of listed and unlisted  securities and private  placements and for
other  purposes.  The Board of  Directors  retained  Salomon  Brothers  based on
Salomon  Brothers'  expertise  in the  valuation  of  companies,  as well as its
familiarity with Orion and other satellite companies.  Salomon Brothers,  in the
ordinary course of its business,  may actively trade the securities of Orion for
its own account and for the accounts of customers, and, accordingly,  may at any
time hold a long or short  position in such  securities.  Salomon  Brothers  may
continue to provide  investment  banking  services to Orion Newco in the future.
Salomon  Brothers has, in the past, and in return for customary  fees,  rendered
certain investment  banking and financial advisory services to Orion,  including
acting  as lead  underwriter  to Orion in  connection  with its  initial  public
offering of Orion  Common  Stock in August  1995.  Orion paid  Salomon  Brothers
$688,490  in  connection  with  Salomon  Brothers'  participation  in  the  1995
Financing.  This amount consisted principally of reimbursement of costs incurred
by Salomon Brothers.

   Pursuant to a letter  agreement,  dated  April 10,  1996,  between  Orion and
Salomon  Brothers,  Orion agreed to pay Salomon Brothers the following fees: (i)
$250,000, which was paid upon execution by Orion of such letter agreement;  (ii)
$500,000,  which was paid upon delivery of the Salomon  Brothers  Opinion to the
Board  of  Directors;  and  (iii) an  additional  $1,000,000,  payable  upon the
successful   completion  of  the   financing   transactions   which   facilitate
consummation  of the  Exchange and the  construction  of Orion 2 and Orion 3. In
addition,  Orion agreed to indemnify and hold harmless  Salomon Brothers and its
affiliates, their respective directors,  officers, agents and employees and each
person, if

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any,  controlling  Salomon  Brothers or any of its  affiliates  against  certain
liabilities and expenses,  including  liabilities  under the federal  securities
laws, incurred in connection with its services.


APPROVALS


   Orion is aware of no governmental  approvals required for consummation of the
Merger, the Exchange and the Debenture  Investments,  other than compliance with
federal  securities  laws and state  securities or "Blue Sky" laws. The Board of
Directors is seeking  stockholder  ratification of the Merger  Agreement and the
transactions contemplated thereby, including the Merger, stockholder approval of
the Exchange Agreement and the transactions contemplated thereby,  including the
Exchange,  and  stockholder  approval  of the  Debenture  Investments.  See "The
Special Meeting -- Voting Rights and Related  Matters" and "-- Votes  Required."


FEES AND EXPENSES

   In general,  whether or not the Merger  Transactions  are  consummated,  each
party to the Merger Agreement and the Exchange Agreement will bear its own costs
and expenses  incurred in  connection  with the Merger  Agreement,  the Exchange
Agreement and the  transactions  contemplated  thereby,  except certain expenses
incurred in connection with the Salomon Brothers  Opinion.  Orion or Orion Newco
will bear all expenses associated with the Debenture Investments.

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

   Set forth below is a summary of certain federal income tax consequences under
the  Internal  Revenue  Code  of  1986,  as  amended  (the  "Code"),   to  Orion
stockholders  (the  "Transferors")  whose  common and  preferred  stock of Orion
("Orion  Stock") is  converted  into common and  preferred  stock of Orion Newco
("Orion Newco  Stock")  pursuant to the Merger.  The following  summary does not
deal with all aspects of federal  taxation  that might be relevant to particular
Transferors,  nor does the summary address any foreign, state, local, estate, or
gift tax aspects. In addition,  the summary addresses only those Transferors who
hold their Orion Stock as a capital asset.  In view of the individual  nature of
tax  consequences,  Transferors are urged to consult with their own tax advisors
regarding  the specific tax  consequences  to them of the Merger,  including the
applicability of federal, state, local and foreign tax laws.

   On January 6, 1997,  Ernst & Young LLP,  tax  advisor to Orion,  rendered  an
opinion ("Tax Opinion") that the Merger Transferors will have the opportunity to
qualify for  nonrecognition  treatment because the Merger will qualify either as
(i) a reorganization  pursuant to Section 368(a) of the Code or (ii) an exchange
satisfying  the  requirements  of Section 351(a) of the Code,  provided  certain
requirements  (discussed  below) are met. In rendering its Tax Opinion,  Ernst &
Young  LLP  relied   upon   certain   representations   made  by  Orion,   which
representations  Ernst & Young LLP has not independently  verified,  and the Tax
Opinion is further based upon certain  limitations  summarized below.  Moreover,
the Tax Opinion is not binding on the Internal  Revenue Service ("IRS") nor does
it preclude the IRS from adopting a contrary position.  The Tax Opinion is based
on provisions of the Code, income tax regulations,  and  administrative  rulings
and  court  decisions  existing  as of the  date of the Tax  Opinion.  All  such
provisions are subject to change which changes may be retroactive. Ernst & Young
LLP is not responsible for notifying Orion or the Merger Transferors of any such
change which may occur subsequent to the date of the Tax Opinion.

   Except as otherwise  noted,  the summary  below  assumes that the Merger will
qualify either as a reorganization  pursuant to Section 368(a) of the Code or as
an exchange  satisfying the  requirements  of Section 351(a) of the Code,  based
upon such Tax Opinion. Subject to the limitations and qualifications referred to
herein, the Tax Opinion addresses and is limited to the following federal income
tax consequences for the Merger Transferors:

   (a) Transferors will recognize no gain or loss in connection with the receipt
of shares of Orion  Newco  Stock in  exchange  for shares of Orion  Stock in the
Merger.

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   (b) Each  Transferor's  tax  basis in the  shares  of  Orion  Newco  Stock it
receives  will be equal to its tax basis in the Orion  Stock it  transferred  to
Orion Newco.

   (c) The  holding  period for the Merger  Transferor's  shares of Orion  Newco
Stock will include the Merger Transferor's holding period in its Orion Stock.

Although  the summary  below  addresses  certain tax issues in addition to those
noted in (a) through (c) above, Ernst & Young LLP's Tax Opinion does not address
such additional tax issues.

   If the  Merger  does not  qualify  for  tax-free  treatment,  (a) the  Merger
Transferors will recognize gain or loss equal to the difference between the fair
market value on the date of the Merger of the Orion Newco Stock they receive and
their tax basis in the Orion Stock they transfer; (b) the tax basis of the Orion
Newco Stock received by each Transferor will equal the fair market value of that
stock on the date of the Merger;  and (c) the  holding  period for each share of
Orion Newco Stock will begin on the day following the date of the Merger.

   Even assuming the Merger qualifies as a tax-free  reorganization or exchange,
holders of Orion  preferred  stock with  dividends  in arrears  might be treated
under Section  305(c) of the Code as  recognizing  ordinary  income (for which a
dividend received  deduction may be available to certain corporate holders) as a
consequence  of the  exchange  of their  Orion  preferred  stock for Orion Newco
preferred  stock in the Merger,  to the extent of the least of (i) the  earnings
and profits of Orion Newco (which likely will include the  accumulated  earnings
and profits of Orion,  if any, as of the close of the taxable  year in which the
Merger is completed),  (ii) the amount of the dividend arrearage with respect to
the Orion preferred  stock, or (iii) the amount by which the greater of the fair
market  value or  liquidation  preference  of the Orion  Newco  preferred  stock
exceeds the issue price of the Orion preferred stock.  However,  the recognition
of  ordinary  income  generally   applies  only  to  exchanges   pursuant  to  a
"recapitalization."    Because   the   Merger    should   not    constitute    a
"recapitalization"  within the meaning of Section  368(a)(1)(E) of the Code, and
because  Orion does not expect Orion or Orion Newco to have any  accumulated  or
current  earnings and profits for the taxable  year in which the Merger  occurs,
Orion does not believe the risk of recognizing ordinary income on an exchange of
Orion  preferred  stock for Orion  Newco  preferred  stock will be  significant.
However,  there  can be no  assurance  that the IRS or a court  considering  the
question will not disagree with Orion's determinations.

   Holders of Orion  preferred  stock should also note that,  if the  redemption
price (including any dividend  arrearage on the date of the Merger) of shares of
Orion Newco  preferred  stock  exceeds the issue  price of those  shares  (which
generally  will be the fair  market  value of the Orion Newco  preferred  stock,
appropriately adjusted to reflect any income recognized by holders under Section
305(c) of the Code in  connection  with the Merger,  as  discussed  above),  the
excess  redemption  price  generally will be taxable to the holders of the Orion
Newco  preferred  stock  as  ordinary  income  (for  which a  dividend  received
deduction may be available to certain corporate holders), to the extent of Orion
Newco's earnings and profits (which, as noted above, likely will include Orion's
accumulated earnings and profits), over the period from the date the Orion Newco
preferred  stock is  issued  to the  date the  Orion  Newco  preferred  stock is
required  (or  deemed  required)  to be  redeemed.  This  could  result  in  the
recognition of ordinary income by Orion Newco preferred  stockholders in advance
of their receipt of cash dividends or redemption proceeds.

   HOLDERS OF ORION  PREFERRED STOCK ARE URGED TO CONSULT THEIR OWN TAX ADVISORS
REGARDING  THE  APPLICATION  OF THE  FOREGOING  RULES TO THEIR  SHARES  OF ORION
PREFERRED STOCK.

   Ernst & Young  LLP's Tax Opinion  that the Merger will  qualify as a tax-free
reorganization  under Section 368(a) of the Code is based on  representations of
Orion that certain  requirements are met,  including:  (i) following the Merger,
Orion will continue to own  substantially  all its assets and  substantially all
the  assets  of Orion  Merger  Subsidiary  (other  than the  Orion  Newco  Stock
distributed in the Merger);  (ii) historic  stockholders  of Orion (i.e.,  Orion
stockholders  who have not acquired  their Orion Stock in  contemplation  of the
Merger) will receive pursuant to the Merger and continue to own (not taking into
account any shares of Orion Newco Stock that are sold or  otherwise  disposed of
following the Merger pursuant to a plan or intention in existence at the time of
the Merger, such as shares sold in

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market  transactions  and shares with respect to which holders have entered into
risk-limiting   transactions,   such  as  short  sales  and  hedges,  that  have
substantially   eliminated   their  potential  for   appreciation  and  risk  of
depreciation) shares of Orion Newco Stock having a fair market value on the date
of the Merger equal to at least 50% of the total  consideration  issued to Orion
stockholders in the Merger; and (iii) following the Merger, Orion Newco will own
stock of Orion  representing  80% of the  voting  power of all  classes of Orion
voting stock. If one or more of the foregoing requirements is not satisfied, the
Merger may  nonetheless  qualify for tax-free  treatment under Section 351(a) of
the Code,  provided shares of Orion Newco Stock issued to the Merger Transferors
and/or Exchanging Partners representing more than 20% of the voting power of all
classes of Orion Newco voting stock (or more than 20% of the total shares of any
class of Orion Newco nonvoting stock issued in the Merger Transactions) are not,
pursuant to a plan or commitment in existence at the time of the Merger, sold or
otherwise  disposed  of to a person who has not made a  significant  transfer of
property to Orion Newco pursuant to either the Merger or the Exchange.

   Even assuming the Merger qualifies as a tax-free  reorganization  or exchange
under Section 351(a) of the Code, holders of existing warrants to purchase Orion
Stock may recognize  gain or loss in connection  with the exchange or conversion
of those  warrants for, or into,  warrants to purchase  Orion Newco Stock.  Such
recognition  of gain or loss generally can be avoided by exercising the warrants
to purchase Orion Stock prior to the Merger.

   Whether or not the Merger qualifies for tax-free treatment, no income or loss
generally  will be  recognized  by holder of a  nonqualified  option to purchase
Orion Stock granted to the holder in connection with the performance of services
(an "Orion  NSO") as a  consequence  of the  conversion  of the Orion NSO into a
nonqualified  option to  purchase  Orion  Newco  Stock (an "Orion  Newco  NSO").
Rather, a holder of an Orion Newco NSO generally will recognize  ordinary income
only when the holder  exercises the Orion Newco NSO, which income generally will
equal the spread  between the fair market value of the Orion Newco Stock on date
of exercise  (determined without regard to any restrictions that will lapse over
time) and the exercise price.

   The  conversion of qualified  incentive  stock  options  ("ISOs") to purchase
Orion Stock into options to purchase  Orion Newco Stock will not  disqualify the
new options to purchase  Orion Newco Stock from ISO status,  provided the Merger
qualifies as a tax-free  reorganization under Section 368(a) of the Code and the
Orion ISO is not modified  other than to permit the holder to exercise the Orion
ISO for Orion Newco Stock. Similarly, shares of Orion stock acquired on exercise
of an Orion ISO will not be the subject of a "disqualifying  disposition" merely
because  the shares  are  exchanged  pursuant  to the Merger for shares of Orion
Newco Stock,  provided the Merger qualifies as a tax-free  reorganization  under
Section  368(a) of the Code.  If,  however,  the Merger  does not  constitute  a
reorganization  described in Section  368(a) of the Code,  then,  regardless  of
whether the Merger qualifies as a tax-free  exchange under Section 351(a) of the
Code,  (i) each  Orion ISO will  become  disqualified  and will be treated as an
Orion  Newco NSO,  and (ii) an  exchange  of shares of Orion  stock  acquired on
exercise of an Orion ISO within one year of the date of exercise,  or within two
years of the date on which the Orion ISO was granted to the  holder,  for shares
of Orion Newco Stock will constitute a "disqualifying  disposition" in which the
holder will recognize  ordinary  income equal to the excess fair market value on
the date of the Merger of the Orion Newco Stock  received over the price paid by
the holder for his or her Orion Stock on exercise of the Orion ISO.

   Pursuant to Section 1032 of the Code, Orion Newco will not recognize any gain
or loss as a result  of  issuing  shares  of  Orion  Newco  Stock to the  Merger
Transferors or to the Exchanging Partners.

   Finally,  it should be noted that Orion and its subsidiaries have substantial
net operating loss carryovers ("NOLs") that currently may be used against future
taxable income of the group.  Due to prior changes in the ownership of the stock
of Orion,  the use of those losses  against future taxable income may be subject
to limitations imposed under Section 382 of the Code.  Further,  the issuance of
the Orion Newco Series C Preferred Stock to Exchanging  Partners will contribute
towards (and may likely cause) an ownership  change under Section  382(g) of the
Code to occur  and  thus  impose  additional  limitations  on the use of  losses
incurred prior to the issuance to offset future taxable income. In general,

                                       60

<PAGE>
under  Section  382 of the Code,  the  annual  amount of taxable  income  earned
following  a change of more than 50 percent in the  ownership  of a  corporation
that can be offset by NOLs incurred  prior to such a change in ownership  equals
the  product of a rate  (published  monthly by the IRS) in effect on the date of
the change of ownership times the fair market value of the  corporation's  stock
outstanding immediately prior to such change in ownership. Depending on the fair
market value of Orion Common Stock, if such an ownership  change does occur as a
result of the issuance of the Series C Preferred  Stock, the change could extend
the period  over  which  Orion may  utilize  its NOLs to offset  future  taxable
income.  The future tax benefit of some portion of the NOLs would likely be lost
to the extent an ownership  change extends the period over which the NOLs can be
utilized beyond the applicable 15-year carryforward period.

   THE SUMMARY SET FORTH ABOVE IS FOR GENERAL  INFORMATION  PURPOSES  ONLY.  THE
SUMMARY IS BASED ON  CURRENTLY  EXISTING  PROVISIONS  OF THE CODE,  EXISTING AND
PROPOSED TREASURY REGULATIONS  THEREUNDER AND CURRENT ADMINISTRATIVE RULINGS AND
COURT DECISIONS AS OF THE DATE OF THIS PROXY STATEMENT/PROSPECTUS,  ALL OF WHICH
ARE SUBJECT TO CHANGE.  TRANSFERORS  ARE URGED TO CONSULT THEIR OWN TAX ADVISORS
AS TO  SPECIFIC  TAX  CONSEQUENCES  TO  THEM  OF  THE  EXCHANGE,  INCLUDING  THE
APPLICABILITY AND EFFECT OF FOREIGN, STATE, LOCAL, AND OTHER APPLICABLE TAX LAWS
AND THE POSSIBLE EFFECT OF ANY PROPOSED CHANGES IN THE TAX LAWS.

SECURITY  OWNERSHIP  OF CERTAIN  BENEFICIAL  OWNERS PRIOR TO AND  FOLLOWING  THE
TRANSACTIONS


   The  following  table sets forth  certain  information  regarding  beneficial
ownership of the Orion Common Stock,  as of September 30, 1996,  and as adjusted
to reflect  the  beneficial  ownership  of Orion  Newco  Common  Stock after the
Merger,  the Exchange,  the Debenture  Investments  and the other  Transactions,
assuming for this purpose that the Transactions close as of January 30, 1997, by
(i) each stockholder known by Orion to be the beneficial owner of more than five
percent of the  outstanding  Orion Common  Stock,  (ii) each  director of Orion,
(iii) each current executive officer named in the Summary Compensation Table and
(iv) all directors and executive officers as a group 

<TABLE>
<CAPTION>
                                                                                                           AFTER THE TRANSACTIONS
                                          BEFORE THE TRANSACTIONS          AFTER THE TRANSACTIONS       ON A FULLY DILUTED BASIS(23)
                                      ------------------------------- ------------------------------- ------------------------------
  
                                                       PERCENT OF                      PERCENT OF                      PERCENT OF
                                         AMOUNT OF    TOTAL SHARES OF    AMOUNT OF    TOTAL SHARES OF    AMOUNT OF   TOTAL SHARES OF
                                          SHARES       COMMON STOCK       SHARES       COMMON STOCK       SHARES     COMMON STOCK
                                       BENEFICIALLY     OUTSTANDING    BENEFICIALLY     OUTSTANDING    BENEFICIALLY   OUTSTANDING
                                           OWNED            (2)            OWNED            (2)            OWNED            (2)
                                      -------------- ---------------- -------------- ---------------- -------------- ---------------
   
<S>                                        <C>            <C>              <C>            <C>              <C>            <C>
NAME AND ADDRESS OF
BENEFICIAL OWNER (1)
Exchanging Partners ................

British Aerospace Space
Systems, Inc. (3)
British Aerospace
Communications, Inc.
13873 Park Center Road
Herndon, VA 22071 ..................      598,183        5.4%            7,119,840       40.5%            7,119,840      27.5%

Lockheed Martin Commercial
Launch Services, Inc.
P.O. Box 179
MSM DC-1400
Denver, CO 80201-0179 ..............      239,769        2.2             1,355,997       11.2             1,355,977       5.2

MCN Sat U.S., Inc
37, Avenue Louis Breuget B.P.1.
78146 Velizy Villacoublay Cedez
France .............................           *          *              1,727,257       13.6             1,727,257       6.7

                                       61

<PAGE>


                                                                                                           AFTER THE TRANSACTION
                                          BEFORE THE TRANSACTIONS          AFTER THE TRANSACTIONS       ON A FULLY DILUTED BASIS(23)
                                     ------------------------------- ------------------------------- -------------------------------
                                                        PERCENT OF                      PERCENT OF                      PERCENT OF
                                         AMOUNT OF    TOTAL SHARES OF    AMOUNT OF    TOTAL SHARES OF    AMOUNT OF   TOTAL SHARES OF
                                          SHARES       COMMON STOCK       SHARES       COMMON STOCK       SHARES     COMMON STOCK
                                       BENEFICIALLY     OUTSTANDING    BENEFICIALLY     OUTSTANDING    BENEFICIALLY   OUTSTANDING
                                           OWNED            (2)            OWNED            (2)            OWNED            (2)
                                      -------------- ---------------- -------------- ---------------- -------------- ---------------
   
Trans-Atlantic Satellite, Inc.
1211 Avenue of the Americas
41st Floor
New York, NY 10036 .................           *          *                796,457       6.8               796,457       3.1

Kingston Communications
International Limited
Telephone House
Carr Lane
Kingston-upon-Hull
HU1 3RE
England ............................     43,252          *                 683,137       5.9               683,137       2.6

COM DEV Satellite
Communications Limited
150 Sheldon Drive
Cambridge, Ontario
Canada N1R 7H6                           18,382          *                 559,067       4.9               559,067       2.2

Exchanging Partners
as a group .........................    899,586          8.1            12,241,755      54.5            12,241,755      47.3

John V. Saeman  
J.V. Saeman & Co.(4)(5)
Medellion Enterprises, LLC
Suite 570
3200 Cherry Creek South Drive
Denver, CO 80209....................  1,486,440         13.4             1,486,440      13.4              1,486,440      5.7

CIBC Wood Gundy Ventures, Inc.
(4)(6)
425 Lexington Avenue
New York, NY 10017                      977,123          8.2               977,123       8.2                977,123      3.8
Cumberland Associates
1114 Avenue of the Americas
New York, NY 10036..................    815,000          7.4               815,000       7.4                815,000      3.2

Fleet Venture Resources, Inc.(4)(7)
Fleet Equity Partners VI, L.P.
Chisholm Partners II, L.P.
50 Kennedy Plaza
Providence, RI 02903................    743,428          6.3               743,428       6.3                743,428      2.9

Dawson-Samberg Capital
Management, Inc.
Pequot General Partners
DS International Partners
Pequot Endowment Partners, L.P.
Dawson-Samberg(8)
354 Pequot Ave.
Southport, CT 06490.................    637,500          5.8               637,500       4.4                637,500      2.5

Space Systems/Loral, Inc.
3925 Fabian Way
Palo Alto, CA 94303.................    588,235          5.4               588,235       5.4                588,235      2.3

Gustave M. Hauser(4)(9)
712 Fifth Avenue
New York, New York 01910............    437,517          4.0               437,517       4.0                437,517      1.7

John G. Puente (4)(10)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................    432,181          3.9               432,181       3.9                432,181      1.7

                                       62

<PAGE>
                                                                                                           AFTER THE TRANSACTIONS
                                          BEFORE THE TRANSACTIONS          AFTER THE TRANSACTIONS       ON A FULLY DILUTED BASIS(23)
                                      ------------------------------- ------------------------------- ------------------------------
                                                        PERCENT OF                      PERCENT OF                      PERCENT OF 
                                         AMOUNT OF    TOTAL SHARES OF    AMOUNT OF    TOTAL SHARES OF    AMOUNT OF   TOTAL SHARES OF
                                          SHARES       COMMON STOCK       SHARES       COMMON STOCK       SHARES      COMMON STOCK
                                       BENEFICIALLY     OUTSTANDING    BENEFICIALLY     OUTSTANDING    BENEFICIALLY    OUTSTANDING
                                           OWNED            (2)            OWNED            (2)            OWNED            (2)
                                      -------------- ---------------- -------------- ---------------- -------------- ---------------
   
Sidney S. Kahn(4)(11)
14 East 60th Street, Suite 500
New York, New York 10022............    254,840          2.3               254,840       2.3               254,840       1.0

W. Neil Bauer (4)(12)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................    133,821          1.2               133,821       1.2               133,821         *

David J. Frear (4)(13)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................     60,181           *                 60,181         *                60,181         *

Richard H. Shay (14)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................     35,805           *                 35,805         *                35,805         *

Warren B. French, Jr. (15)
124 S. Main Street
Edinburg, VA 22824..................     15,623           *                 15,623         *                15,623         *

Richard J. Brekka (16)
CIBC Wood Gundy Ventures, Inc.
425 Lexington Avenue
New York, NY 10017..................     10,000           *                 10,000         *                10,000         *

Barry Horowitz (17)
Mitretek Systems, Inc.
7525 Colshire Drive
McLean, VA 22102....................     10,000           *                 10,000         *                10,000         *

Douglas H. Newman (18)
2440 Research Blvd., Suite 400 
Rockville, MD 20850 ................     20,000           *                 20,000         *                20,000         *

W. Anthony Rice (19)
British Aerospace
13873 Park Center Road
Herndon, VA 22071...................     10,000           *                 10,000         *                10,000         *

Robert M. Van Degna (20)
Fleet Equity Partners
50 Kennedy Plaza
Providence, RI 02903................     10,000           *                 10,000         *                10,000         *

Hans Giner (21)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................      5,000           *                  5,000         *                 5,000         *

Dennis J. Curtin (22)
2440 Research Blvd., Suite 400
Rockville, MD 20850.................     26,039           *                 26,039         *                26,039         *

All directors and executive
officers as a group (15 persons) ...  2,947,447         25.6             2,947,447      25.6             2,947,447      11.4
</TABLE>
- ----------
    *  Less than 1%.

(1)  In accordance with Rule 13d-3 under the Exchange Act, a person is deemed to
     be a "beneficial  owner" of a security if he or she has or shares the power
     to vote or direct  the voting of such  security  or the power to dispose or
     direct the  disposition of such  security.  A person is also deemed to be a
     beneficial  owner of any  securities  of which that person has the right to
     acquire  beneficial  ownership within 60 days from September 30, 1996. More
     than  one  person  may be  deemed  to be a  beneficial  owner  of the  same
     securities.  All  persons  shown in the table  above  have sole  voting and
     investment power, except as otherwise indicated. This table includes shares
     of Orion Common Stock subject to outstanding  options  granted  pursuant to
     Orion's Stock Option Plan and the Non-Employee  Director Stock Option Plan.
     The shares held by the Exchanging Partners

                                       63

<PAGE>
     may be deemed to be beneficially owned by their parent companies, including
     British  Aerospace  Public  Limited  Company,  COM DEV,  Limited,  Kingston
     Communications (Hull) plc, Martin Marietta Technologies,  Inc. and Lockheed
     Martin  Corporation,  Matra Hachette and Nissho Iwai Corporation.  See "The
     Merger,  the  Exchange  and  the  Debenture  Investments  --  The  Exchange
     Agreement -- Parties."

(2)  For the purpose of computing the  percentage  ownership of each  beneficial
     owner,  any securities which were not outstanding but which were subject to
     options,  warrants, rights or conversion privileges held by such beneficial
     owner  exercisable  within  60  days  were  deemed  to  be  outstanding  in
     determining  the  percentage  owned by such  person  but  were  not  deemed
     outstanding in determining the percentage owned by any other person.

(3)  Includes  511,678 shares held of record and 86,505 shares issuable upon the
     exercise of warrants held by British  Aerospace  Space  Systems,  Inc. Such
     warrants were exercised subsequent to September 30, 1996.

(4)  Does not include  shares  issuable  upon  exercise  of  warrants  which are
     exercisable  only in the event  that the Orion  Senior  Preferred  Stock is
     redeemed by Orion prior to its conversion into Orion Newco Common Stock.

(5)  The 1,486,440  shares of Orion Common Stock  beneficially  owned by John V.
     Saeman  include  58,823 shares  issuable  upon  conversion of 500 shares of
     Orion Series A Preferred  Stock, and 16,339 shares issuable upon conversion
     of 166.667  shares of Orion  Series B  Preferred  Stock.  Of the  remaining
     1,411,278 shares of stock beneficially owned by John V. Saeman, 814,005 are
     held by J. V. Saeman & Co., a general partnership,  of which Mr. Saeman and
     his wife are the sole  partners,  40,196 are held by JCC,  Ltd.,  a limited
     partnership,  of  which J. V.  Saeman & Co.  is the  general  partner,  and
     535,523  are  held by  Medallion  Enterprises,  LLC,  a  limited  liability
     company,  of which Mr. Saeman and his wife are the sole  members.  Includes
     10,000 shares issuable upon exercise of stock options exercisable within 60
     days.

(6)  Includes  764,705 shares  issuable upon conversion of 6,500 shares of Orion
     Series A Preferred  Stock and 212,418  shares  issuable upon  conversion of
     2,166.667  shares of Orion  Series B  Preferred  Stock held by CIBC,  which
     conversion  would  increase  the number of shares of Orion  Common Stock by
     977,123 (8.9%).

(7)  Includes  588,234 shares  issuable upon conversion of 4,000 shares of Orion
     Series A Preferred Stock held by the two Fleet entities (which include, for
     purposes of this footnote,  Fleet Venture Resources,  Inc. and Fleet Equity
     Partners, VI, L.P.) and 1,000 shares of Orion Series A Preferred Stock held
     by Chisholm, and 130,685 shares issuable upon conversion of 1,333 shares of
     Orion Series B Preferred Stock held by Fleet and preferred  options held by
     Chisholm  which are  convertible  into 24,509 shares of Orion Common Stock.
     Such  conversion  would increase the number of outstanding  shares of Orion
     Common Stock by 743,428 (6.8%).

(8)  Includes 54,100 shares held by  Dawson-Samberg  Capital  Management,  Inc.,
     235,400 shares held by Pequot General  Partners,  204,100 shares held by DS
     International   Partners  and  143,900  shares  held  by  Pequot  Endowment
     Partners, L.P.

(9)  Includes  58,823 shares issuable upon the conversion of 500 shares of Orion
     Series A Preferred  Stock and 16,339  shares  issuable  upon  conversion of
     166.667 shares of Orion Series B Preferred Stock held by Mr. Hauser and his
     wife.  Includes  10,000  shares  issuable  upon  exercise of stock  options
     exercisable within 60 days.

(10) Includes  58,439  shares held of record and 7,351 shares  issuable upon the
     exercise of options by Mr. Puente's wife.  Includes  321,501 shares held of
     record,  43,087 shares  issuable upon the exercise of stock options,  1,411
     shares  issuable  upon  the  conversion  of 12  shares  of  Orion  Series A
     Preferred  Stock and 392 shares  issuable  upon  conversion  of 4 shares of
     Orion Series B Preferred  Stock held by Mr. Puente.  Includes 10,000 shares
     issuable upon exercise of stock options exercisable within 60 days.

(11) Includes  29,411  shares  issuable upon the exercise of 250 shares of Orion
     Series A Preferred  Stock and 8,169  shares  issuable  upon  conversion  of
     83.333  shares of Orion Series B Preferred  Stock.  Includes  10,000 shares
     issuable upon exercise of stock options exercisable within 60 days.

(12) Includes 133,821 shares issuable upon the exercise of stock options held by
     Mr. Bauer  exercisable  within 60 days. Does not include 10,220 shares held
     of record,  1,882 shares issuable upon the conversion of 16 shares of Orion
     Series A Preferred  Stock and 522 shares  issuable upon conversion of 5.333
     shares of Orion Series B Preferred Stock purchased in June 1995 held by Mr.
     Bauer's wife. Mr. Bauer disclaims beneficial ownership of these shares.

(13) Includes  46,321  shares  issuable  upon  the  exercise  of  stock  options
     exercisable  within 60 days and 1,176 shares issuable upon conversion of 10
     shares of Orion  Series A  Preferred  Stock and 326  shares  issuable  upon
     conversion of 3.333 shares of Orion Series B Preferred Stock.

(14) Includes 18,895 shares issuable upon exercise of stock options  exercisable
     within 60 days.

(15) Does not include 172,520 shares held of record, 29,412 shares issuable upon
     the  conversion  of 250 shares of Orion  Series A Preferred  Stock or 8,170
     shares  issuable  upon  conversion  of  83.334  shares  of  Orion  Series B
     Preferred Stock held by Shenandoah Telecommunications Company, of which Mr.
     French is the former  Chairman  and  presently  a  consultant.  Mr.  French
     disclaims  beneficial  ownership of these  shares.  Includes  10,000 shares
     issuable upon exercise of stock options exercisable within 60 days.

(16) Mr. Brekka disclaims  beneficial ownership of all shares of Orion's capital
     stock which are owned by CIBC Wood Gundy.  Includes  10,000 shares issuable
     upon exercise of stock options exercisable within 60 days.

                                       64

<PAGE>


(17) Includes  10,000  shares  issuable  upon  the  exercise  of  stock  options
     exercisable within 60 days.

(18) Includes  10,000  shares  issuable  upon  the  exercise  of  stock  options
     exercisable within 60 days.

(19) Does not include  598,183 shares  beneficially  owned by British  Aerospace
     Space Systems, Inc. Mr. Rice, a Director of Orion and a director of British
     Aerospace  Space Systems,  Inc.,  disclaims  beneficial  ownership of these
     shares.  Includes  10,000  shares  issuable  upon exercise of stock options
     exercisable within 60 days.

(20) Excludes  588,234 shares  issuable upon conversion of 4,000 shares of Orion
     Series A Preferred  Stock held by Fleet and 1,000  shares of Orion Series A
     Preferred  Stock  held  by  Chisholm,  and  130,685  shares  issuable  upon
     conversion of 1,333 shares of Orion Series B Preferred  Stock held by Fleet
     and preferred  options held by Chisholm which are  convertible  into 24,509
     shares of Orion Common Stock.  Such conversion would increase the number of
     outstanding  shares of Orion Common Stock by 743,428 (6.8%). Mr. Van Degna,
     a Director of Orion, is the chairman and chief executive officer of each of
     the  managing  general  partners of Fleet Equity  Partners  VI,  L.P.,  the
     chairman and chief executive officer of Fleet Venture  Resources,  Inc. and
     the chairman and chief  executive  officer of the  corporation  that is the
     general partner of the partnership  that is the general partner of Chisholm
     Partners II, L.P.  Mr. Van Degna  disclaims  beneficial  ownership of these
     shares.  Includes  10,000  shares  issuable  upon exercise of stock options
     exercisable within 60 days.

(21) Includes  5,000  shares   issuable  upon  the  exercise  of  stock  options
     exercisable within 60 days.

(22) Includes  14,446  shares  issuable  upon  the  exercise  of  stock  options
     exercisable  within 60 days, and 705 shares issuable upon the conversion of
     6 shares of Orion  Series A Preferred  Stock and 196 shares  issuable  upon
     conversion of 2 shares of Orion Series B Preferred Stock.

(23) The percentage  ownership of each  beneficial  owner  calculated on a fully
     diluted  basis  assumes   conversion  of  all  securities  which  were  not
     outstanding  but  which  were  subject  to  options,  warrants,  rights  or
     conversion  privileges held by all beneficial owners  exercisable within 60
     days.

                                       65

<PAGE>


                           THE RELATED TRANSACTIONS


   The following describes certain  Transactions whose completion is a condition
to the Merger, the Exchange or the Debenture Investments.


THE NOTES OFFERING/ORION 1 CREDIT FACILITY REFINANCING

   Orion 1 Credit Facility Refinancing.  The Orion 1 Credit Facility Refinancing
and the release of the Limited Partners' (and their  affiliates') Orion 1 Credit
Facility  Support  Agreements (as defined below) is a condition to the Exchange,
and such release and the Exchange are conditions to the Debenture Investments. A
substantial portion of the funding for the Orion 1 satellite,  which constitutes
the principal asset of Orion Atlantic (and, indirectly,  of Orion), was provided
under the Orion 1 Credit  Facility.  Principal and interest  payments  under the
Orion 1 Credit Facility commenced in July 1995, six months after commencement of
commercial operations of Orion 1. As of September 30, 1996, approximately $210.4
million remained outstanding under the Orion 1 Credit Facility. That facility is
secured by substantially all of the assets of Orion Atlantic. The Orion 1 Credit
Facility also is supported by certain  guarantees  and other  commitments by the
Exchanging   Partners   and  Orion  (the  "Orion  1  Credit   Facility   Support
Agreements"),  under  which the  Exchanging  Partners  and Orion  agreed to make
payments to Orion Atlantic, either on a monthly basis or to the extent needed to
meet  obligations  under the Orion 1 Credit Facility or otherwise,  of over $420
million over the seven-year period commencing with commercial operation of Orion
1. Through  September  30,  1996,  the  Exchanging  Partners and Orion have paid
approximately  $26.7 million to Orion Atlantic under the Orion 1 Credit Facility
Support Agreements.

   In  connection  with the Orion 1 Credit  Facility  Refinancing,  Orion Newco,
Orion  Atlantic,  Orion,  OrionSat and the Exchanging  Partners are obligated to
take all measures reasonable  necessary or advisable to cause the Bank Agreement
Termination  and the  Capacity  Agreement  Termination.  However,  the  Capacity
Agreements of Kingston and Matra (but not the  associated  Capacity  Guarantees)
will remain in full force and effect and the Kingston Capacity Agreement and the
Matra Capacity Agreement will be deemed amended, effective as of the date of the
Exchange, to reduce the amount of capacity subject to such Capacity Agreements.

   Notes Offering. The Orion 1 Credit Facility Refinancing will be effected with
the  proceeds of the Notes  Offering.  It is presently  expected  that the Notes
Offering will be in the amount of approximately $347 million with expected gross
proceeds of approximately $275 million  (excluding  approximately $72 million of
overfunding  of interest due on such notes).  The possible  effects of incurring
substantial  additional  indebtedness  are  discussed  elsewhere  in this  Proxy
Statement/Prospectus  under the  captions  "Risk  Factors -- Risks  Relating  to
Orion's   Business  --   Substantial   Leverage;   Secured   Indebtedness"   and
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  of Orion --  Liquidity  and  Capital  Resources  -- Current  Funding
Requirements."  Orion Newco is expected to incur substantial  additional amounts
of  indebtedness  over the next few years,  as described above under the caption
"Risk  Factors -- Risks  Relating  to Orion's  Business  -- Need for  Additional
Capital."

   The Notes  Offering is expected to include (i) Senior Notes due 2007 of Orion
Newco  ("Senior  Notes") sold as a unit with Warrants  ("Warrants")  to purchase
shares of Orion Newco  Common Stock and (ii) Senior  Discount  Notes due 2007 of
Orion Newco  ("Senior  Discount  Notes" and together with the Senior Notes,  the
"Notes") sold as a unit with  Warrants to purchase  shares of Orion Newco Common
Stock.  It is  expected  that the Notes will be  guaranteed  by each  Restricted
Subsidiary (as defined in the Notes Indentures) of the Company. The Senior Notes
are presently expected to be issued at their principal amount with cash interest
payable on a semi-annual  basis. The first six semi-annual  interest payments on
the  Senior  Notes  are to be paid  from an  escrow  account  funded  out of the
proceeds of the Notes Offering. The Senior Discount Notes are presently expected
to be issued at a discount from their principal amount,  and no cash interest is
expected  to be payable on the Senior  Discount  Notes for the first five years.
The Notes are  presently  expected  to rank  senior in right of  payment  to all
subordinated indebtedness of the Company and pari passu in right of payment with
all  unsecured  senior  indebtedness  of the  Company.  The Notes are  presently
expected  to be  unsecured  (except to the extent of the  proceeds in the escrow
account for  application to the first six semi-annual  interest  payments on the
Senior

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<PAGE>


Notes).  The Notes are presently expected to mature ten years after issuance and
to provide for optional and mandatory redemption.

   The Notes are to be issued  under Notes  Indentures  among Orion  Newco,  its
Restricted Subsidiaries and a trustee which are expected to contain, among other
limitations,  covenants  which will  restrict the ability of the Company and its
subsidiaries  to:  incur  additional  indebtedness;   create  liens;  engage  in
sale-leaseback  transactions;  pay dividends or make distributions in respect of
their capital stock; make investments or make certain other restricted payments;
sell assets;  create  restrictions on the ability of restricted  subsidiaries to
make certain  payments;  issue or sell stock of restricted  subsidiaries;  enter
into  transactions with  stockholders or affiliates;  and consolidate,  merge or
sell all or substantially all of their assets.  However,  these limitations will
be subject to a number of important qualifications and exceptions.


   Each Warrant will entitle the holder thereof to purchase the number of shares
of Orion Newco Common Stock at the exercise  prices that will be  established at
the time the Warrants are issued.  The Warrants are presently expected not to be
exercisable  for at least six months,  and  possibly  longer,  after the date of
issuance. The Warrants are presently expected to expire on the tenth anniversary
of the date of issuance. 

   The terms of the Notes and the  Warrants  as  issued  may  differ in  certain
respects from the terms described  above. See "Risk Factors -- Risks Relating to
Merger,  Exchange and Debenture  Investments  -- Certain Terms of Notes Offering
Not Yet Determined."

   Each of the  Exchanging  Partners  has agreed that Orion Newco may pursue the
Notes  Offering  to effect the Orion 1 Credit  Facility  Refinancing.  Under the
Exchange Agreement,  however,  Orion Newco and Orion have reserved the right not
to proceed with the Notes Offering if they determine that it would not be in the
best  interests  of the  stockholders  of Orion  Newco or Orion  (including  the
entities who would become stockholders of Orion Newco after the Merger).

OAP ACQUISITION

   Orion has  acquired or is in the process of  acquiring  the only  outstanding
minority  interest in Orion Asia Pacific from an affiliate of British  Aerospace
for approximately  86,000 shares of Orion Newco Common Stock. Orion acquired the
remainder  of Orion Asia  Pacific in December  1992.  Orion Asia  Pacific  holds
rights under an agreement with the Republic of the Marshall  Islands pursuant to
which Orion is pursuing an orbital slot for the Orion 3 satellite.  Consummation
of the OAP Acquisition is a condition to the British Aerospace Investment.

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<PAGE>


                        INFORMATION ABOUT ORION NEWCO

   Orion  Newco is a newly  formed  Delaware  corporation.  Orion is the initial
stockholder of Orion Newco and owns one share of Orion Newco Common Stock. Orion
Newco  is  substantially  identical  in  all  material  respects  to  Orion.  In
particular,   Orion  Newco  has  a  certificate  of  incorporation   and  bylaws
substantially identical in all material respects to those of Orion and a capital
structure  substantially  identical  to that of  Orion.  For  more  information,
stockholders  are referred to Orion Newco's  certificate  of  incorporation  and
bylaws  filed as  exhibits  to the  Registration  Statement  of which this Proxy
Statement/Prospectus is a part.

                   DESCRIPTION OF ORION NEWCO CAPITAL STOCK

   The authorized  capital stock of Orion Newco consists of 40,000,000 shares of
Orion Newco Common  Stock,  par value $.01 per share,  and  1,000,000  shares of
preferred stock, par value $.01 per share.

   The following  summary  description  of the capital stock of Orion Newco upon
consummation  of the  Merger  Transactions  and  the  Debenture  Investments  is
qualified in its entirety by reference to the Certificate of  Incorporation  and
Bylaws of Orion Newco, copies of which are filed as exhibits to the Registration
Statement of which this Proxy Statement/Prospectus is a part.

ORION NEWCO COMMON STOCK

   As of December 15, 1996,  there were 10,974,121  shares of Orion Common Stock
outstanding, held by approximately 350 stockholders of record.

   As described  below,  the rights and  preferences of Orion Newco Common Stock
are  substantially  identical in all material  respects to those of Orion Common
Stock.

   Dividends.  Subject to  preferences  that may then be  applicable to any then
outstanding preferred stock, holders of Orion Newco Common Stock are entitled to
receive  dividends  out of funds  legally  available  therefor  when,  as and if
declared by the Board of Directors.  Orion has not paid any cash  dividends upon
its Orion Common Stock and does not plan to pay any  dividends on such stock for
the  foreseeable  future.  The Notes  Indentures  will  contain  covenants  that
restrict Orion Newco's ability to pay cash dividends.

   Voting  Rights.  Each holder of Orion Newco  Common  Stock is entitled to one
vote per share of Orion Newco Common Stock held by such holder on all matters to
be voted upon by the  stockholders  of Orion  Newco.  Holders of shares of Orion
Newco Common Stock are not entitled to cumulative voting rights.

   Staggered  Terms  of  Directors.   Under  the  provisions  of  Orion  Newco's
Certificate of Incorporation,  the members of the Board of Directors are divided
into three classes with the term of one class  expiring each year.  Accordingly,
only  those  Directors  of a single  class can be changed in any one year and it
could take three years to change the entire  Board.  While Orion Newco  believes
that a staggered  Board of Directors is in the best interests of Orion Newco and
its stockholders,  such requirement may have the effect of protecting management
in retaining its position and discouraging potential acquirors.

   Liquidation Rights. All shares of Orion Newco Common Stock have equal rights,
on a share for share  basis,  to receive  pro rata the net assets of Orion Newco
upon  liquidation  or  dissolution  after  payments to creditors  and holders of
preferred stock, if any, then issued and outstanding. There are no redemption or
sinking  fund  provisions  applicable  to the  Orion  Newco  Common  Stock.  All
outstanding  shares of Orion  Newco  Common  Stock are,  and the shares of Orion
Newco Common Stock offered  hereby will be when issued in  accordance  herewith,
fully paid and non-assessable.

ORION NEWCO PREFERRED STOCK

   Orion Newco's Certificate of Incorporation  authorizes the Board of Directors
to issue, from time to time and without further  stockholder action, one or more
series of preferred stock, and to fix the relative rights and preferences of the
shares, including voting powers, dividend rights, liquidation preferences,

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<PAGE>


redemption  rights and conversion  privileges.  Because of its broad  discretion
with respect to the creation and issuance of preferred stock without stockholder
approval,  the Board of Directors could adversely affect the voting power of the
holders of Orion Newco  Common Stock and, by issuing  shares of preferred  stock
with certain voting,  conversion and/or redemption rights,  could discourage any
attempt to obtain control of Orion Newco.

ORION NEWCO SENIOR PREFERRED STOCK

   As  described  above under the caption  "The  Merger,  the  Exchange  and the
Debenture Investments -- The Merger Agreement -- Terms of the Merger Agreement,"
pursuant to the Merger Orion Newco will issue the Orion Newco Series A Preferred
Stock and the Orion Newco Series B Preferred  Stock in exchange for an identical
number of shares of Orion Series A Preferred Stock
and Orion Series B Preferred Stock.

   Preemptive  Rights.  The holders of Orion Newco Senior Preferred Stock have a
contractual  "preemptive"  right to  purchase  a pro rata  portion of any equity
securities sold by Orion Newco in the future on the same terms and conditions as
sold to others,  subject to certain exceptions for securities sold or granted to
employees, certain small offerings, existing rights to acquire equity securities
and public offerings of securities under the Securities Act.


   Dividends and Conversion. Dividends on the Orion Newco Senior Preferred Stock
accrue at 8% per annum,  and are payable as and when declared by the Board.  The
Orion Newco Senior  Preferred Stock is convertible into Orion Newco Common Stock
at  initial  prices of $8.50 and $10.20  per  share,  subject  to  anti-dilution
adjustments in the case of  recapitalizations or issuances of Orion Newco Common
Stock below the conversion  price (other than pursuant to Warrants issued in the
Notes  Offering).  Future  issuances  of Orion  Newco  Common  Stock  below  the
conversion  price could  significantly  increase the percentage of Orion Newco's
equity  owned by the holders of the Orion Newco  Senior  Preferred  Stock.  Upon
conversion  of the Orion Newco Senior  Preferred  Stock,  any accrued and unpaid
dividends on the Orion Newco Senior Preferred Stock will be waived. 

   Liquidation  Rights. The Orion Newco Senior Preferred Stock has a liquidation
preference  equal to the amount  invested,  which  preference  increases  to the
extent of any accrued and unpaid dividends.

   Voting Rights. Holders of the Orion Newco Senior Preferred Stock are entitled
to vote with holders of the Orion Newco  Series C Preferred  Stock and the Orion
Newco Common Stock, together as a single class on an as-if-converted basis.

   Put Rights.  The holders of Orion Newco Senior Preferred Stock have the right
to sell the Orion Newco Common Stock  received  upon the  conversion  thereof to
Orion Newco upon,  among other things,  certain  mergers,  changes of control or
sales of substantially all the assets of Orion Newco at the pro rata interest of
such holders in the consideration  received,  in the case of certain fundamental
changes, or fair market value. In the case of mergers in which the consideration
to be received by holders of Orion  Newco  Common  Stock is in a form other than
cash, Orion Newco shall pay the purchase price with a combination of a specified
amount  of freely  tradable  securities,  a  specified  amount of cash,  and the
balance with a note  payable  over two years.  The holders of Orion Newco Senior
Preferred  Stock (and any Orion Newco Common Stock  received upon the conversion
thereof)  also have the right to sell such stock (or the common  stock  issuable
upon  conversion  thereof)  to Orion Newco  commencing  in June 1999 at the fair
market value of their  shares (in the case of Orion Newco  Common  Stock) or the
liquidation value,  including accrued and unpaid dividends (in the case of Orion
Newco Senior Preferred Stock), in accordance with the following schedule:

                           ON OR AFTER MAY 31,  PORTION
                         -------------------   ---------
                         1999...............    33 1/3 %
                         2000...............    66 2/3 %
                         2001...............   100     %



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<PAGE>

   The  holders of Orion  Newco  Senior  Preferred  Stock  have  agreed to waive
exercise  of  these  rights  for so  long  as any  Notes  or  Debentures  remain
outstanding.  These rights  terminate  upon the closing of a  "Qualified  Public
Offering," as discussed below. 

   Tag Along Rights.  Certain  principal  stockholders  of Orion have granted to
CIBC,  Fleet and  Chisholm  the right to have a pro rata  portion  (based on the
percentage  of Orion Newco Common Stock  outstanding)  of the Orion Newco Common
Stock  issuable  upon  conversion  of the Orion  Newco  Senior  Preferred  Stock
included in any sales by those principal stockholders which involve more than 5%
of the Orion Newco Common Stock then outstanding.

   Termination of Certain Rights Upon Qualified Public  Offering.  The rights of
the holders of the Orion Newco Senior Preferred Stock relating to sale following
certain  mergers,  changes of control or sale of substantially  all assets,  the
rights  to sell  such  stock  to  Orion  Newco  commencing  in  June  1999 or in
connection  with  certain  business  combinations  at  fair  market  value,  the
preemptive rights and certain of the additional investment rights terminate upon
the  closing  of a  "Qualified  Public  Offering"  which is  defined as a public
offering of the Orion Newco Common  Stock with gross  proceeds to Orion Newco of
not less than $30 million and a public offering price per share of not less than
$25.50.

   Restrictive Covenants;  Representations.  The documents relating to the Orion
Newco Senior  Preferred  Stock  impose  certain  covenants  on Orion Newco.  The
covenants  include  limitations  on payment of  dividends,  redemption of junior
securities  such as Orion  Newco  Common  Stock,  certain  issuances  of  senior
securities  (except  when the  Orion  Newco  Senior  Preferred  Stock is able to
acquire an  equivalent  seniority),  expansion  into other  lines of business or
engaging  in  certain  affiliated  transactions.  Failure  to comply  with those
covenants  (or failure of  representations  to be true and  complete  when made)
could result in an increase in the dividend on the Orion Newco Senior  Preferred
Stock not to exceed an annual  dividend of 14% and could give the holders of the
Orion Newco Senior  Preferred  Stock certain  rights to sell such stock to Orion
Newco if the  non-compliance  is material or (in certain cases)  continues after
certain cure periods.  The Notes  Indentures  are expected to contain a covenant
which  will  effectively  prohibit  such  sale to  Orion  while  any  Notes  are
outstanding.  Orion  Newco  has the  right to  redeem  the  Orion  Newco  Senior
Preferred  Stock (subject to limitations  contained in the Notes  Indentures) at
its liquidation  value (plus accrued and unpaid  dividends) by paying holders of
Orion Newco Senior  Preferred Stock that amount and activating  certain warrants
(issued  concurrently  with the Orion Newco Senior  Preferred Stock) to purchase
Orion Newco  Common  Stock at the  conversion  price of such Orion Newco  Senior
Preferred  Stock.  These warrants do not become  exercisable  unless Orion Newco
exercises its right to repurchase the Orion Newco Senior Preferred Stock.

   Orion  Newco's  Right to Force  Conversion  of Orion Newco  Senior  Preferred
Stock.  Orion Newco may require  conversion of the Orion Newco Senior  Preferred
Stock  (resulting  in the  cancellation  of accrued but unpaid  dividends) if it
meets  certain  public  float  requirements,  the holders of Orion Newco  Senior
Preferred Stock are not subject to any agreements  restricting the sale of Orion
Newco Common Stock received on conversion  and the closing  trading price of the
Orion Newco Common Stock for 30 of the 45 trading days  preceding  notice of the
required  conversion  has been  above  (i)  $21.24  (if  Orion  Newco  makes the
conversion  election  prior to June 17,  1997) and (ii)  $25.50 (if Orion  Newco
makes the conversion election on or after June 17, 1997).

ORION NEWCO SERIES C PREFERRED STOCK


   The  relative  rights and  preferences  of the Orion Newco Series C Preferred
Stock will be as set forth on the Certificate of Designations, the form of which
is  attached  to  this  Proxy  Statement/Prospectus  as  Attachment  C,  and are
described above under "The Merger, the Exchange and the Debenture Investments --
Description of the Orion Newco Series C Preferred Stock."

WARRANTS AND OPTIONS

   As of December  15, 1996,  there were  warrants  and options  outstanding  to
purchase an  aggregate  of  1,193,721  shares of Orion  Common Stock at exercise
prices ranging from $8.16 to $14.00 per share,  with a weighted average exercise
price of $10.31 per share. Holders of Orion Series A Preferred Stock have

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<PAGE>


(and  holders of Orion  Newco  Series A  Preferred  Stock will have)  options to
invest an additional  approximately  $350,000 in similar preferred stock (except
that such similar  preferred  stock would be  convertible at any time into Orion
Newco  Common  Stock at a price based upon the date when the option is exercised
within a range from $10.20 to $17.00 per share of Orion Newco Common Stock). The
holders of Orion Newco  Senior  Preferred  Stock also hold  certain  warrants to
purchase  Orion Newco Common Stock at the  conversion  price of such Orion Newco
Senior Preferred Stock.  These warrants do not become  exercisable  unless Orion
Newco exercises its right to repurchase the Orion Newco Senior  Preferred Stock.
The warrants  and options  contain  provisions  for the  adjustment  of exercise
prices  in  certain   events,   including   stock   dividends,   stock   splits,
reorganizations, reclassifications or mergers.

REGISTRATION RIGHTS


   Orion Newco Senior Preferred  Stock;  SS/L. The holders of Orion Newco Senior
Preferred Stock and SS/L (an existing stockholder) are entitled to include their
shares of Orion Newco  Common Stock in a registered  offering of  securities  by
Orion Newco (a "piggyback"  registration) for its own account or for the account
of its  stockholders.  If Orion Newco  proposes to register  any shares of Orion
Newco  Common  Stock  under  the  Securities  Act  (other  than for an  offering
primarily to  employees  or in  connection  with a merger or  acquisition),  the
holder of  registration  rights may request that Orion include in the registered
offering  shares  held by such  holder or which the holder  would  receive  upon
conversion or exercise.  If so requested,  Orion Newco must use its best efforts
to include in the  registered  offering all shares  requested,  provided,  among
other conditions,  that the managing  underwriter of such offering has the right
to limit or exclude  entirely  such shares of Orion Newco Common Stock from such
offering. Orion Newco is required to bear all registration and selling expenses,
other  than  underwriting  discounts,  selling  commissions,   applicable  stock
transfer taxes, and certain  registration fees and expenses,  in connection with
such piggyback registrations.

   The  holders  of Orion  Newco  Senior  Preferred  Stock  have  demand  rights
(including   two  "long  form"  and  an   unlimited   number  of  "short   form"
registrations)  to require Orion Newco to register the securities  held by them,
subject to certain conditions.  Orion Newco is required to bear all registration
and selling expenses,  other than underwriting  discounts,  selling commissions,
applicable stock transfer taxes, and certain registration fees and expenses,  in
connection with such demand registrations.


   Series C Preferred Stock. The registration  rights held by the holders of the
Orion Newco Series C Preferred Stock are described above under "The Merger,  the
Exchange and the Debenture Investments-- Registration Rights."

   Any exercise of such registration rights may hinder efforts by Orion Newco to
arrange  future  financings of Orion Newco and may have an adverse effect on the
market price of the Orion Newco Common Stock.  See "Orion Newco Shares  Eligible
for Future Sale."

CERTAIN ANTI-TAKEOVER EFFECTS

   Orion  Newco's  Certificate  of  Incorporation  and  Bylaws  contain  certain
provisions  that are  intended  to enhance  the  likelihood  of  continuity  and
stability in the  composition  of Orion  Newco's  Board of Directors  and in the
policies formulated by the Board of Directors,  and to discourage an unsolicited
takeover  of  Orion  Newco if the  Board of  Directors  determines  that  such a
takeover  is not in the best  interest  of  Orion  Newco  and its  stockholders.
However, these provisions could have the effect of discouraging certain attempts
to acquire Orion Newco or remove incumbent management even if some or a majority
of Orion Newco's  stockholders  were to deem such an attempt to be in their best
interest,  including  those  attempts  that might  result in a premium  over the
market price for the shares of Orion Newco Common Stock held by stockholders.

   Orion Newco is subject to Section 203 of the Delaware General Corporation Law
("Section  203")  which,  subject to certain  exceptions,  prohibits  a Delaware
corporation from engaging in certain business  combinations  with any interested
stockholder for a period of three years following the date that such stockholder
became an interested stockholder. In general, Section 203 defines an "interested
stockholder"  as any  entity or person  beneficially  owning  15% or more of the
outstanding voting stock of

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<PAGE>


the  corporation  and any entity or person  affiliated  with or  controlling  or
controlled by such entity or person. A Delaware  corporation may elect not to be
subject to Section 203 by having its  stockholders  approve an  amendment to its
certificate of incorporation or bylaws to such effect.  Orion Newco has not made
such an election and,  therefore,  Section 203 may have an anti-takeover  effect
with respect to Orion Newco.


   Under the  Communications  Act, if Orion Newco controlled an FCC radio common
carrier  licensee  (which it presently does not), the FCC could refuse or revoke
such licensee's license if (i) over 25% of Orion Newco was controlled by foreign
persons or  entities  and (ii) the FCC found that the public  interest  would be
served  thereby.  Because of these  provisions,  Orion  Newco's  Certificate  of
Incorporation  empowers  the Board of  Directors of Orion Newco to redeem any of
Orion Newco's  outstanding  capital stock to the extent necessary to prevent the
loss  or  secure  the  reinstatement  of  any  license  or  franchise  from  any
governmental agency. Such stock may be redeemed at the lesser of (i) fair market
value or (ii) such holder's  purchase price (if the stock was purchased within a
year of such redemption). See "Information About Orion's Business -- Regulation"
and "Risk  Factors -- Risks  Relating to Orion's  Business -- Approvals  Needed;
Regulation of Industry."  The Company has agreed to certain limits on this right
with respect to the Debenture Investments. See "The Merger, the Exchange and the
Debenture Investments -- The Debenture Investments."

   Orion Newco's  Certificate of  Incorporation  contains a provision (the "Fair
Price  Provision")  that  requires  the approval of the holders of a majority of
Orion  Newco's  voting  stock  (other  than voting  stock held by an  Interested
Stockholder  (as defined  below)) as a condition to a merger or to certain other
business  transactions  with,  or proposed  by, a holder of 20% or more of Orion
Newco's voting stock (an "Interested Stockholder"), except in cases (such as the
Debenture Investments) where the Continuing Directors approve the transaction or
certain  minimum price  criteria and other  procedural  requirements  are met. A
"Continuing  Director" is a director  who is not an  Interested  Stockholder  or
affiliated with an Interested Stockholder or who was a member of the Board prior
to the time the Interested Stockholder became an Interested Stockholder or whose
nomination or election to the Board of Directors is recommended or approved by a
majority of the  Continuing  Directors.  The minimum  price  criteria  generally
require that, in a transaction in which  stockholders  are to receive  payments,
holders of Orion Newco  Common  Stock must  receive a value equal to the highest
price paid by the Interested Stockholder for Orion Newco Common Stock during the
prior  two  years,  and  that  such  payment  be made in cash or in the  type of
consideration paid by the Interested Stockholder for the greatest portion of its
shares.  Orion Newco's Board of Directors believes that the Fair Price Provision
will help assure that all of Orion Newco's stockholders are treated similarly if
certain kinds of business  combinations  are effected.  However,  the Fair Price
Provision may make it more difficult to accomplish certain transactions that are
opposed by the  incumbent  Board of Directors  and that could be  beneficial  to
stockholders. 

   Orion  Newco's  Certificate  of  Incorporation  also  requires any person (or
entity) (the "Acquiring Stockholder") who acquires or seeks to acquire shares of
capital stock of the Company that would  increase such person's  voting power in
Orion Newco above any of three thresholds (20%, 33% or 50%) to send a disclosure
statement to Orion Newco and the other stockholders.  The Acquiring  Stockholder
must  receive the  approval of the holders of a majority of the other  shares of
Orion Newco before the Acquiring  Stockholder  can vote the acquired  stock.  In
addition,  if the Acquiring  Stockholder  has acquired or is acquiring more than
50% of the outstanding  capital stock,  the other  stockholders who vote against
such acquisition are entitled to dissent and obtain for their shares, from Orion
Newco,  payment  equivalent  to the estimated  fair value of their  shares.  The
practical  effect of this requirement is to condition the acquisition of control
of Orion Newco on the approval of a majority of the  pre-existing  disinterested
stockholders.

     Orion Newco's Certificate of Incorporation  provides that all actions taken
by  the  stockholders  must  be  taken  at  an  annual  or  special  meeting  of
stockholders.  Under the Bylaws,  special  meetings of the stockholders of Orion
Newco may be called only by a majority of the members of the Board of Directors,
the  Chairman  or  stockholders  owning  in the  aggregate  at least  35% of the
outstanding shares of capital stock of Orion Newco entitled to vote. Orion Newco
is not obligated to hold more than one

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<PAGE>


special meeting called by stockholders during any six-month period. Stockholders
are required to comply with certain  advance notice  provisions  with respect to
any  nominations  of candidates for election to Orion Newco's Board of Directors
or other proposals submitted for stockholder vote. These provisions may have the
effect of  deterring  hostile  takeovers  or  delaying  changes  in  control  or
management of Orion Newco.


   Orion Newco's  Certificate of Incorporation and Bylaws provide that the Board
of Directors of Orion Newco is divided into three  classes of directors  serving
staggered  three-year  terms. The  classification of directors has the effect of
making it more difficult for stockholders to change the composition of the Board
of Directors in a relatively  short  period of time.  The  authorized  number of
directors  may be  changed by  resolution  of the Board of  Directors  or by the
holders of at least  two-thirds of the voting power of all  outstanding  shares,
and directors may not be removed without cause.


   The foregoing  provisions of Orion Newco's  Certificate of Incorporation  and
Bylaws,  except for those dealing with the  liability of  directors,  may not be
altered,  amended or repealed  without  the  approval of the holders of at least
two-thirds  of the  voting  power of all  outstanding  shares  entitled  to vote
thereon and the affirmative vote of the Board of Directors.

LISTING

   The Orion Common Stock is, and after the Merger  Transactions the Orion Newco
Common  Stock will be,  quoted on the Nasdaq  National  Market under the trading
symbol "ONSI."

TRANSFER AGENT

   The transfer agent and registrar for the Orion Common Stock is, and after the
Merger  Transactions the transfer agent and registrar for the Orion Newco Common
Stock will be, Fleet National Bank.

                 ORION NEWCO SHARES ELIGIBLE FOR FUTURE SALE


   Upon completion of the Merger and the Exchange,  there will be  approximately
25.9 million  shares of Orion Newco Common Stock  outstanding on a fully diluted
basis,  assuming a closing of the Merger  Transactions  as of January 30,  1997.
Approximately  14.5  million of these  shares will  initially be held by Orion's
current  stockholders,   all  of  which  will  be  freely  transferable  without
restriction or further registration under the Securities Act, other than the 5.5
million  shares held by  "affiliates"  of Orion  Newco,  as that term is defined
under the  Securities  Act.  The shares  held by  affiliates  of Orion Newco are
expected to be eligible for sale pursuant to Rule 144 under the Securities  Act.
In general,  under Rule 144 as currently in effect,  a person (or persons  whose
shares are  aggregated),  including an  affiliate,  who has  beneficially  owned
shares of Orion Newco (or shares of Orion  exchanged  for shares of Orion Newco)
for at least two years  (including  the holding  period of any prior owner other
than an affiliate) is entitled to sell, within any three-month  period, a number
of shares  that does not  exceed the  greater of (i) 1% of the then  outstanding
shares of Orion Newco Common Stock  (approximately  111,000  shares  outstanding
immediately after the Transactions) or (ii) the average weekly trading volume of
the Orion Newco Common Stock during the four calendar weeks preceding such sale,
subject to the filing of a Form 144 with respect to such sale and certain  other
limitations and  restrictions.  In addition,  a person who is not deemed to have
been an  affiliate  of Orion  Newco at any time  during the 90 days  preceding a
sale, and who has  beneficially  owned the shares proposed to be sold (or shares
of Orion exchanged for such shares) for at least three years,  would be entitled
to sell such  shares  under  Rule  144(k)  without  regard  to the  requirements
described above.

   The  Exchanging  Partners,  as owners of the Orion  Newco  Series C Preferred
Stock,  and  British  Aerospace  and  Matra  Marconi  Space,  as  owners  of the
Debentures,  will own the  remaining  11.4 million  shares of Orion Newco Common
Stock,  which will be issuable upon the  conversion of such  securities.  All of
such shares will be deemed to be "restricted securities" as that term is defined
in Rule 144.  Moreover,  each  Exchanging  Partner  will  enter  into a Transfer
Restriction Agreement regarding the transfer of the shares of Orion Newco Common
Stock  issuable upon  conversion  of, or as dividends on, the Series C Preferred
Stock. Pursuant to the applicable Transfer Restriction  Agreement, each Exchang-

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ing Partner may not  transfer any shares of Orion Newco Common Stock issued upon
conversion of shares of Series C Preferred  Stock or as dividends on such Series
C Preferred Stock (the "Affected  Shares")  without the prior written consent of
Orion Newco  until the  expiration  of the Lockup  Period  (other  than  certain
transfers to affiliates).  Also, pursuant to the applicable Transfer Restriction
Agreement,  each Exchanging  Partner agrees that it will not transfer during any
90-day period Affected Shares that  collectively  represent more than 25% of the
aggregate  number of shares of Orion Newco Common Stock issuable upon conversion
of the Series C Preferred Stock received by such Exchanging  Partner pursuant to
the Exchange  Agreement  or as  dividends on such Series C Preferred  Stock (the
"25% Limit") unless any such transfer is (i) pursuant to an underwritten, public
offering  pursuant to a registration  statement  under the Securities  Act, (ii)
pursuant to a tender or exchange  offer made by or on behalf of the Company or a
third party,  (iii) in connection with a merger,  consolidation,  sale of all or
substantially  all  of  the  assets,  recapitalization  or  similar  transaction
involving  Orion Newco or (iv) pursuant to a transaction  not involving a public
distribution  or  offering  registered  under  the  Securities  Act and not made
through a broker,  dealer or  market-maker  pursuant  to Rule 144  (including  a
pledge  that  meets such  requirements);  provided,  however,  that prior to any
transfer of Affected Shares under clause (iv) above and prior to any transfer of
Series C Preferred Stock other than under the  circumstances set forth in clause
(i),  (ii) or (iii) above,  the  transferee  shall  execute and deliver to Orion
Newco a transfer  restriction  agreement  substantially  similar to the Transfer
Restriction  Agreement  the  transferor  originally  entered into  (omitting the
Lockup  Period  provision  noted  above).  The 25% Limit  described  above  will
terminate on the date that is five years after the date of issuance of the Orion
Newco Series C Preferred  Stock under the Exchange  Agreement.  See "The Merger,
the Exchange and the Debenture  Investments -- Certain  Transfer  Restrictions."

   The Exchanging Partners and holders of the Debentures will be granted certain
shelf,  demand and  "piggyback"  registration  rights with  respect to the Orion
Newco  Common  Stock  issuable  upon  conversion  of the  Orion  Newco  Series C
Preferred  Stock or such  Debentures,  respectively,  and the Orion Newco Common
Stock issuable as dividends  thereon or interest with respect thereto.  See "The
Merger, the Exchange and the Debenture  Investments -- Registration  Rights" and
"-- The Debenture Investments."

   No  predictions  can be made as to the  effect,  if any,  that sales of Orion
Newco  Common  Stock or the  availability  of  additional  shares of Orion Newco
Common Stock for sale by the Exchanging  Partners or other stockholders of Orion
Newco would have on the market price of the Orion Newco Common Stock  prevailing
from time to time or on the  ability of Orion Newco to raise  additional  equity
financing.  See "The  Merger,  the  Exchange and the  Debenture  Investments  --
Registration  Rights," "-- Certain  Transfer  Restrictions,"  "-- The  Debenture
Investments" and "-- Security  Ownership of Certain  Beneficial  Owners Prior to
and Following the Transactions." 

                 COMPARATIVE RIGHTS OF ORION STOCKHOLDERS AND
                           ORION NEWCO STOCKHOLDERS

   Upon   consummation  of  the  Merger,   stockholders  of  Orion  will  become
stockholders  of Orion  Newco.  There are no  material  differences  between the
rights  stockholders  of Orion possessed prior to the Merger and the rights such
stockholders will have after the Merger as Orion Newco stockholders.

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                      INFORMATION ABOUT ORION'S BUSINESS

OVERVIEW


   Orion  is  a  rapidly  growing  provider  of  satellite-based  communications
services, focused primarily on (i) private communications network services, (ii)
Internet services and (iii) video distribution and other satellite  transmission
services. Orion provides multinational  corporations with private communications
networks designed to carry high speed data, fax, video  teleconferencing,  voice
and other  specialized  services.  The  Orion  satellite's  ubiquitous  coverage
reaches all locations within its footprint,  enabling the delivery of high speed
data to  customers  in  emerging  markets  and remote  locations  which lack the
necessary infrastructure to support these services. The Company also offers high
speed Internet access and transmission  services to companies outside the United
States seeking to avoid "last mile" terrestrial connections and bypass congested
regional Internet network routes. In addition, Orion provides satellite capacity
for video  distribution,  satellite news gathering and other satellite  services
primarily to broadcasters,  news organizations and telecommunications providers.
The Company provides its services directly to customer premises using VSATs.

   The Company commenced operations of the Orion 1 satellite in January 1995. As
of  September  30, 1996,  Orion  serviced  167  customers  through 304 points of
service.   The  Company's   customers   include  Amoco  Poland  Limited,   Amway
Corporation, AT&T Corp., BBC, British Telecom, CNN, Citibank, N.A., Deere & Co.,
Global  One,  GTECH  Corporation,  Hungarian  Broadcasting,  News  International
Limited, RTL Television, Pepsi-Cola International, Sprint Communications, Viacom
International Inc., Westinghouse Communications,  World Wide Television News and
Xerox Corporation,  or certain of their subsidiaries.  As of September 30, 1996,
Orion's contract  backlog was $123 million (after pro forma  adjustments for the
Exchange).  Substantially  all of Orion's  current  contracts with customers are
denominated in U.S. Dollars.  For the three months ended September 30, 1996, the
Company generated revenues of $12.2 million and had a loss from operations,  net
loss and EBITDA (as defined  below) of $(7.2)  million,  $(5.8) million and $1.7
million,  respectively. For the first nine months of 1996, the Company generated
revenues of $30.0  million and had a loss from  operations,  net loss,  net cash
used in  operating  actives  and EBITDA of  $(26.3)  million,  $(19.8)  million,
$(25.0) million and $0.1 million,  respectively.  "EBITDA"  represents  earnings
before minority  interests,  interest  income,  interest  expense,  net of other
expense  (income),  income  taxes,  depreciation  and  amortization.  EBITDA  is
commonly used in the  communications  industry to analyze companies on the basis
of  operating  performance,  leverage and  liquidity.  EBITDA is not intended to
represent  cash  flows  for  the  period  and  should  not be  considered  as an
alternative to cash flows from operating,  investing or financing  activities as
determined in accordance with GAAP.  EBITDA is not a measurement  under GAAP and
may not be comparable to other similarly titled measures of other companies.

   The Company owns and operates the Orion 1 satellite,  which provides coverage
of 34 European countries,  much of the United States and parts of Canada, Mexico
and North  Africa.  Through  arrangements  with local  ground  operators,  Orion
currently has the ability to deliver network  services to and among points in 27
European countries,  portions of the United States and a limited number of Latin
American  countries.  Orion 2, expected to be launched in the second  quarter of
1999,  will  increase  significantly  the  Company's  pan-European  capacity and
provide coverage of Central and South America.  Orion 3, expected to be launched
in the fourth quarter of 1998, will cover broad areas of the Asia Pacific region
including China, Japan, Korea, India,  Southeast Asia,  Australia,  New Zealand,
Eastern Russia and Hawaii. In the aggregate,  the footprints of Orion 1, Orion 2
and Orion 3 will cover approximately 86% of the world's population.

   The Company believes that demand for satellite based communications  services
will continue to grow due to (i) the  expansion of businesses  beyond the limits
of wide bandwidth terrestrial infrastructure,  (ii) accelerating demand for high
speed data services,  (iii) growing  demand for Internet and intranet  services,
especially  outside  the  U.S.,  (iv)  increased  size and  scope of  television
programming  distribution,  (v)  worldwide  deregulation  of  telecommunications
markets, and (vi) continuing technological advancements.  Satellites are able to
provide reliable,  high bandwidth  services anywhere in their coverage areas and
the Company  believes that it is well  positioned  to satisfy  market demand for
these services.  In 
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addition,  the  Company  believes  that  satellites  will play a larger  role in
providing  Internet  services  due  to  their  flexibility  to  accomodate  high
bandwidth and asymmetric traffic.

FEATURES AND BENEFITS

   Orion's  satellite-based  network  offers  customers  a number  of  important
features, which provide significant benefits versus competing alternatives.

         Bypass  terrestrial  network  and  multiple  international   connection
      points.  Orion's ability to bypass terrestrial facilities improves service
      reliability and quality by reducing potential points of failure and avoids
      "last mile" limitations.  In addition,  terrestrial bypass allows Orion to
      avoid the multiple  in-country toll charges of terrestrial  facilities and
      thereby reduces cost.


         Direct  end-to-end  service to customer sites.  Orion provides  service
      from  rooftop to rooftop  using VSAT earth  stations  located on  customer
      premises. This "end-to-end service" is reliable, rapidly installed, easily
      upgraded  and  avoids  the "last  mile"  limitations  of some  terrestrial
      alternatives.


         Ubiquitous coverage.  Orion delivers wide bandwidth service to emerging
      markets  and remote  locations  where there are no  effective  terrestrial
      alternatives.

         One-stop shopping.  Orion provides its customers with a single point of
      contact for customer care, including service, billing and support.

         Two-way  communications for all sites. Orion's meshed network solutions
      and frame relay services  promote  network  efficiency and allow real-time
      data transfer among dispersed network points.

         Well-suited  for asymmetric  communications  traffic.  Orion's  network
      solutions can be designed to carry asymmetric traffic  efficiently,  which
      increases  performance  and lowers cost to customers  for services such as
      Internet services.

         Point to multipoint  capability.  Orion's  ability to broadcast  video,
      data and voice to  multiple  locations  simultaneously  enables  efficient
      network design.

         High power Ku-band transmissions,  high reception sensitivity.  Orion's
      high power  transmissions  allow  customers  to lower  costs by  utilizing
      small,  less  expensive  earth  station  equipment.  Orion  1's  reception
      sensitivity  allows for effective  reception from portable earth stations,
      an advantage in satellite news gathering.

         Cost-competitive. Orion prices its services to be competitive with both
      satellite-based and terrestrial alternatives.

THE ORION SATELLITE SYSTEM


   The  Company  launched  Orion  1, a  high-power  satellite  with  34  Ku-band
transponders,  in  November  of 1994.  Orion 1 provides  coverage of 34 European
countries,  much of the  United  States  and parts of  Canada,  Mexico and North
Africa.  Through  arrangements with local ground operators,  Orion currently has
the  ability to deliver  network  services  to and among  points in 27  European
countries,  portions of the United States and a limited number of Latin American
countries.

   The Company has recently signed a contract for the construction and launch of
Orion 2. Orion 2 will expand the Company's European coverage and extend coverage
to portions of the  Commonwealth  of Independent  States,  Latin America and the
Middle East,  as shown in more detail in the footprint set forth below under the
caption "--  Implementation  of the Orion Satellite  System -- Orion 2." Orion 2
will increase significantly the Company's  pan-European capacity,  currently the
area of  strongest  demand for the  Company's  services.  The  Company  recently
commenced  selling  services  in  certain  areas  of Latin  America.  Orion 2 is
scheduled to be launched in the second quarter of 1999.

   The Company has recently entered into an authorization to proceed with Hughes
Space for the construction and launch of Orion 3 and has commenced  construction
of Orion 3. Orion 3 will cover broad areas of the Asia Pacific region  including
China, Japan,  Korea, India,  Southeast Asia,  Australia,  New Zealand,  Eastern
Russia and  Hawaii,  as shown in more  detail in the  footprint  set forth below
under 

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the caption "--  Implementation of the Orion Satellite System -- Orion 3." Orion
3's  footprint  will  provide  the  Company  with the  ability  to  redistribute
programming  from the  United  States  via  Hawaii  to most of the Asia  Pacific
region.  The Company has already  taken a number of steps to  establish an early
market  presence in Asia, and has entered into an $89 million lease for eight of
Orion 3's 43  transponders.  Orion 3 is  scheduled  to be launched in the fourth
quarter of 1998.

   In the  aggregate,  the footprints of Orion 1, Orion 2 and Orion 3 will cover
approximately 86% of the world's population.  Maps of the footprints of Orion 1,
Orion 2 and Orion 3 are set forth below under the caption "--  Implementation of
the Orion Satellite System." 

THE ORION STRATEGY


   Orion's  strategy is to  maximize  its  revenues  per  satellite  transponder
through the delivery of value-added  services to end users. To quickly establish
a  stable  base  of  revenues,   Orion  sells  transponder   capacity  to  video
broadcasters  and  telecommunications   service  providers.   However,   Orion's
long-term  strategic  focus is on value-added  private network  services,  which
include network design, VSAT installation,  support and monitoring,  in addition
to basic satellite  capacity service.  The implementation of Orion's strategy is
based on the following elements: 

   o  Focus on Specialized Communications Needs of Multinational
      Organizations

   o  Bridge to Emerging Markets and Remote Locations

   o  End-to-End Service

   o  Global Coverage

   o  Early Market Entry

   o  Local Presence

   o  Ownership of Facilities

FOCUS ON SPECIALIZED COMMUNICATIONS NEEDS OF MULTINATIONAL ORGANIZATIONS

   Orion  targets  the  needs  of  multinational   businesses  and  governmental
customers for customized private network communications services.  Advantages of
the Company's  satellite-based  network services include:  (i) transmission over
wide areas to multiple dispersed sites including sites in emerging markets; (ii)
interconnectivity  among all sites;  (iii) wide  bandwidth and high data speeds;
(iv)  transmission  of  data,  fax.  teleconferencing  and  voice  over the same
network; (v) high transmission reliability,  quality and security; (vi) Internet
access; and (vii) rapid  implementation,  both for the initial  installation and
for later network modifications. Due to the flexibility of the network, Orion is
able to provide companies with customized solutions to link multiple locations.

BRIDGE TO EMERGING MARKETS AND REMOTE LOCATIONS


   Orion  targets  customers  doing  business  in  emerging  markets  and remote
locations  of  developed  markets  which  often lack the fiber optic and digital
infrastructure  required  for wide  bandwidth,  high  speed  data  applications.
Terrestrial  transmissions  in many  emerging  markets  must often pass  through
local,  poorly developed network segments before reaching the customer premises,
making it difficult to send and receive  high speed data.  In contrast,  Orion's
satellite system completely avoids such  "bottlenecks" in local network segments
by sending and receiving transmissions directly to and from customers,  avoiding
the need to interconnect with the local infrastructure. A significant portion of
Orion's private communications network customers transmit high-speed data to and
from  locations in Central and Eastern  Europe.  Orion 2 and Orion 3 will extend
coverage to the Commonwealth of Independent  States,  Latin America and the Asia
Pacific Region. 

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END-TO-END SERVICE


   Orion provides its services  directly to and among customer  locations  using
satellite  transmission  and VSATs  installed  at  customer  premises.  Offering
end-to-end  services and bypassing  terrestrial  infrastructure  allows Orion to
offer higher  reliability  and higher  quality  services  than some  terrestrial
facilities by bypassing multiple  telecommunications service providers and local
networks and avoiding  related toll  charges.  It also permits  Orion to install
networks more quickly than many of its competitors,  who must deal with multiple
vendors and multiple  communications  technologies.  Orion offers its  customers
one-stop  shopping.  This includes a single point of contact,  an  all-inclusive
contract and consistent quality of service throughout the network.

GLOBAL COVERAGE

   Orion believes that providing  global coverage is a competitive  advantage in
marketing to multinational  corporations.  Orion 1 covers 34 European countries,
much of the U.S. and  portions of Canada,  Mexico and North  Africa.  Orion uses
capacity  leased from other  carriers to  supplement  its network  coverage area
(such as to areas of Russia and Latin America).  Orion estimates that when Orion
2 (with coverage of Europe,  Russia,  the eastern United States,  Latin America,
North Africa and the Middle East) and Orion 3 (with coverage of the Asia Pacific
region) are deployed,  the satellite  footprints in the aggregate  will cover an
area inhabited by  approximately  86% of the world's  population.  This coverage
will enable Orion to offer its customers a single  source for service  offerings
and a greater measure of network quality control than terrestrial alternatives.

EARLY MARKET ENTRY

   Orion develops an early market presence in targeted geographic areas prior to
satellite  launch in order to build its customer base. To accomplish this, Orion
hires sales people,  develops relationships with ground operators,  and delivers
its services using leased satellite capacity. Orion employed this strategy prior
to the  commercial  operation of the Orion 1 satellite  and is pursuing the same
approach  with  Orion 2 and  Orion 3. For  example,  the  Company  is  currently
providing service in Latin America and Russia over leased satellite capacity.

LOCAL PRESENCE

   Orion has arrangements with 30 local ground operators covering most countries
within the Orion 1 footprint, and is entering into additional arrangements as it
offers services in new areas.  These ground  operators are critical to providing
integrated service because they obtain necessary licenses,  install and maintain
the  customers'  networks,  provide  in-country  business  experience  and often
facilitate market entry.

OWNERSHIP OF FACILITIES

   Orion believes it is strategically important to own its satellite facilities.
Orion  believes  that  over the  long-term  ownership  of  satellite  facilities
provides a cost  advantage over  resellers and other private  service  providers
that must  lease  satellite  capacity  to provide  services  to  customers.  The
Company's  satellite ownership enables it to control the quality and reliability
of its network solutions,  maintain the flexibility to rapidly add capacity, new
locations  and new features to its  customer  networks,  and respond  quickly to
customer requests. 

INDUSTRY OVERVIEW

   Fixed communications  satellites are generally located in geostationary orbit
approximately 22,300 miles above the earth and blanket large geographic areas of
the  earth  with  signal   coverage.   Satellites   are  thus  well  suited  for
transmissions that must reach many locations over vast distances  simultaneously
(i.e.,   point-to-multipoint   transmissions),   such  as  the  distribution  of
television  programming to cable operators,  television stations and directly to
homes.  Satellites  can be  accessed  from  virtually  any  location  within the
geographic  area they cover.  This  ubiquitous  coverage allows the satellite to
transmit voice and data 

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communications  to remote  locations  and  emerging  markets  where  terrestrial
infrastructure  is  not  well  developed.  Historically,  satellites  were  used
primarily for international  voice and data traffic,  using large earth stations
that  enabled  lower-power  satellites  to  function as "cables in the sky." The
principal drawback to satellite-based  voice transmission is the 1/4 of a second
delay  caused by the signal  traveling to and from the  satellite.  In the U.S.,
Western Europe and Japan,  the use of satellites for voice traffic has decreased
since  the  early  1980s  with  the  growth  of  fiber  optic  cable   networks.
Geostationary  satellites now are used  primarily for  television  distribution.
However,  voice and data  traffic  remains the  dominant  use of  satellites  in
developing countries.

   Prior to the  late  1970s or early  1980s,  most  terrestrial  infrastructure
consisted of copper wire (and, to a lesser extent, microwave systems), which was
well suited for  ordinary  telephone  service.  Today most  developed  economies
employ fiber optic cables,  which provide much wider  bandwidth than copper.  In
addition,  transoceanic  cables  now link most major  industrialized  countries.
Fiber optic  cables are well suited for carrying  large  amounts of bulk traffic
between two fixed  locations,  and unlike copper wire facilities have sufficient
capacity to carry the high speed data communications that comprise an increasing
percentage of  communications  traffic.  However,  in many less developed areas,
terrestrial  facilities  still consist mainly of copper wire. Even in areas with
fiber optic  networks,  the "last mile"  connections to customer  premises often
consist of copper  wire.  As a result,  customers  with sites in areas which are
underdeveloped or which have not upgraded their "last mile" copper wire to fiber
optic  cable  often do not have  access  to the full  range of high  speed  data
communications demanded by many businesses.

   Satellites  provide a number of advantages  over  terrestrial  facilities for
many high speed communications  services.  First,  satellites provide ubiquitous
service within their  footprint and can deliver  service  directly to customers'
premises.  Satellites enable high speed communications service where there is no
suitable  terrestrial  alternative  available.   In  addition,   satellites  can
completely bypass terrestrial network congestion points, "last mile" bottlenecks
and  unreliable  networks of incumbent  service  providers  to provide  advanced
services to locations where  conventional  terrestrial  service is available but
inadequate.  Second,  the  cost to  provide  bandwidth  via  satellite  does not
increase with the distance between sending and receiving stations. Not only must
terrestrial networks add physical capacity to cover additional  distances,  they
must also continually reamplify transmission signals. Satellites are well suited
for   transmission   across  large   distances,   for  wide  bandwidth  and  for
point-to-multipoint   (broadcast)   applications.   Finally,   since  VSATs  are
relatively easy to install and/or relocate, high power satellite networks can be
rapidly installed, upgraded and reconfigured. In contrast, installation of fiber
optic cable is expensive, time consuming and requires obtaining rights-of-way.

   The current generation of high power Ku-band satellites,  such as Orion 1, is
particularly well suited to provide high speed business  communications services
in addition to video distribution  services.  The use of the Ku-band frequencies
(as  opposed to the  C-band  used by older  generations  of  satellites)  offers
reduced interference with ground communications.  This enables satellites to use
the higher  broadcasting  power necessary to support small,  low-cost VSAT earth
stations and makes it cost effective to transmit to or among numerous locations.

DATA NETWORKING

   During the past decade,  there has been significant growth in data networking
applications. The data networking market includes a number of types of services,
including  leased  lines for private  networks,  public data  network  services,
managed  network   services,   frame  relay  and  other  services  such  as  ATM
(asynchronous transfer mode) and WAN (wide area network) services. Ovum, Ltd. (a
U.K.-based   consulting   firm)   estimates   that   revenues   from   the  X.25
packet-switched  data  networking  services  in  Western  Europe  alone  totaled
approximately  $2.7 billion in 1996,  excluding  revenues  from such services as
leased lines, frame relay and ATM. Data networking applications include: 

   o Private network services; intranets: Many companies are utilizing their own
"private" networks to meet their specific communications requirements, including
voice  and  data  communications,   business  television  transmissions,   video
teleconferencing,  high speed fax and e-mail.  Corporate  networks  offer higher
performance,  greater  control and  security  than can be  provided  through the
public  network.   
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Corporations  are also taking  advantage of intranets to distribute  information
within their own companies using Internet technologies.

   o Data  inquiry,  collection  and  retrieval:  Hotel and  travel  reservation
systems and  financial  enterprises  use  private  communications  networks  for
database inquiries and retrieval of information  stored on computers.  Banks use
such networks to verify account  balances and connect  automatic teller machines
to computers.  Retail establishments verify credit standing and gather inventory
information. Other businesses use private communications networks to gather data
from multiple locations and transport it to central locations for analysis.

   o Internet/intranet:   Business  and  consumers  rely  on  the Internet for a
growing number of services,  including research, e-mail, data exchange, software
and graphics,  financial services and shopping,  and even voice  communications.
These  applications  are  predicted  to continue to expand and  diversify in the
future as enabling technologies mature.

   o  Image  transmissions:  Manufacturing,  publishing,  research  and  medical
industries  use  dedicated  communications  networks for  high-resolution  image
transmissions requiring large amounts of bandwidth.

   o Government networks:  Network  telecommunications  are employed for complex
military and nonmilitary government  applications,  including administrative and
logistical functions, that require high security and customer network control.

   Orion  believes  that the  demand  for  international  data  networking  will
continue to grow as a result of (i) the shift to client/server  computing,  (ii)
the  proliferation  of bandwidth  intensive  applications and the development of
protocols such as frame relay to handle these applications, and (iii) use of the
Internet and intranets as part of main-stream corporate communications.

      (i) Shift to client/server computing. Businesses are increasingly shifting
   from using large host computers and centralized data network architectures to
   distributed  PC and  workstation  based  platforms.  As a result,  businesses
   require more private  network  infrastructure  to establish and  interconnect
   local and wide area networks.  As businesses become more global,  the ability
   to link multiple locations becomes more critical.

      (ii)  Proliferation  of  bandwidth  intensive  applications;  frame relay.
   Companies are relying more heavily on applications  such as CAD/CAM and image
   transfer  that require more  bandwidth  and result in traffic  patterns  that
   involve bursts of transmissions.  In addition, there is increasing demand for
   near-instantaneous  connectivity  and fast,  reliable data  transport.  Frame
   relay services  support these  applications  and reduce the cost of fully and
   partially  meshed  networks.  The Company expects that demand for frame relay
   services will experience rapid growth through the year 2000.

      (iii)  Expansion  in  Internet  and  intranet  services.  The  Internet is
   becoming a major  vehicle for economic and social  activity  enabling  broad,
   global access to financial and business information,  research material,  and
   information on leisure,  arts and general interest  topics.  Business uses of
   the Internet include  communication  within and among businesses,  electronic
   commerce,  advertising  and  merchandising.  Internet  usage  has also led to
   increased demand for "intranet" services for corporate applications. Intranet
   servers are used for publishing  information,  processing data and data-based
   applications and collaboration among employees, vendors, and customers.

   The significant growth in data networking services has led to rapid growth in
demand for satellite-based networks. Multinational companies are not always able
to implement client/server architectures, install wide bandwidth applications or
employ  Internet  and intranet  solutions in every market due to  underdeveloped
terrestrial communications infrastructure.  Therefore, a growing use of VSATs is
to provide wide bandwidth  capacity to industrial  sites in emerging markets and
remote locations.  Recent Comsys and Price Waterhouse reports have identified an
installed  base of 140,000 to 160,000  VSATs and predict  significant  worldwide
growth over the next few years.

ORION MARKET OPPORTUNITY

   The Company believes that demand for satellite based communications  services
will  continue to grow  because of (i) the  expansion of  businesses  beyond the
limits of wide bandwidth  terrestrial  infrastructure,  (ii) accelerating demand
for high speed data services, (iii) growing demand for Internet and 

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<PAGE>

intranet services, especially outside the U.S., (iv) increased size and scope of
television   programming    distribution,    (v)   worldwide   deregulation   of
telecommunications markets, and (vi) continuing technological advancements.

      (i) Expansion of business beyond the limits of wide bandwidth  terrestrial
   infrastructure. Overall growth in the international telecommunications market
   reflects the increasingly  international  nature of business,  the increasing
   importance of emerging and newly industrialized economies and the increase in
   international trade. International businesses expanding into emerging markets
   often  rely on the  incumbent  communications  service  providers  for  voice
   circuits.   However,  as  large  organizations   increasingly  rely  on  more
   sophisticated,  high speed  communications  services to run their businesses,
   many of these  companies  face  operational  bottlenecks  when  attempting to
   implement  more  sophisticated  communications  networks.  These problems are
   faced both by  companies  in emerging  markets  and  companies  in  developed
   markets that rely on "last mile" copper infrastructure to interconnect with a
   fiber optic network.  Satellites  provide wide bandwidth  end-to-end  service
   directly  connecting  customer  premises and  bypassing  the  limitations  of
   terrestrial facilities.

      (ii)  Accelerating  demand  for high speed  data  services.  The growth of
   graphical user  interfaces,  the popularity of  image-intensive  applications
   such as CAD/CAM, the incorporation of high-resolution  electronic images into
   business  processes  and  video   teleconferencing  have  necessitated  major
   upgrades of corporate  data  networks to  accommodate  the high data transfer
   requirements  of these  applications.  Most of these high speed data services
   require fiber optic cable or other high bandwidth connections to the customer
   premises.  Even in  developed  markets,  the "last  mile"  connection  to the
   customers  premises often  consists of copper wire,  which cannot handle many
   high speed data services. Satellites are well positioned to take advantage of
   this trend because they provide reliable high bandwidth service everywhere in
   their coverage areas, reaching sites in underdeveloped areas and bypass "last
   mile"  copper  wire   facilities   that  are  unable  to  handle  high  speed
   communications.

      (iii) Demand for Internet  and intranet  services.  The growth in Internet
   and intranet services has further strained corporate network infrastructures.
   The utility of Internet services to users is often constrained by the lack of
   sufficient bandwidth to support  high-resolution  graphical  applications and
   images.  Even where  infrastructure  quality is high, the rapid growth of the
   Internet continues to create network  congestion.  Users are sometimes unable
   to use current-generation  software or gain high speed access to the Internet
   due to the poor quality of their local terrestrial infrastructure. Satellites
   have  many  advantages  in  delivering  Internet  services.  satellite  based
   networks  provide   services   directly  to  customer   premises,   bypassing
   terrestrial  bottlenecks  and  congested  Internet  routing  facilities.   In
   addition,  satellite based networks can be designed to support asymmetric and
   multicast Internet traffic much more efficiently than terrestrial networks.

      (iv) Increased size and scope of television programming distribution.  The
   global television market is experiencing significant growth, both in terms of
   the number of  broadcasters  creating  programming and the number of channels
   available to viewers. Within the U.S., the number of television broadcast and
   cable television program networks grew from three in 1970 to over 100 in 1993
   and to  approximately  200 in 1996. U.S. and  international  broadcasters are
   seeking  to  expand  into  each  others'  markets,  increasing  the  need for
   satellite   transmission   capacity.   Non-U.S.    broadcasters   are   using
   international satellites to distribute domestic programming to U.S. and other
   overseas  audiences of similar cultural  heritage.  Furthermore,  the Company
   believes  that  as  the  number  of  broadcasters  and  channels   increases,
   individual   competitors   will   have  a   greater   need  for   competitive
   differentiation  which will increase the use of live transmissions and expand
   television coverage. Multichannel programming is expanding rapidly in Eastern
   Europe,  Latin America and Asia. The growth in  multichannel  programming has
   increased the demand for  international  programming such as news and sports.
   Orion  is  well  positioned  to take  advantage  of  this  growth  due to its
   high-power Ku-band satellite and transatlantic footprint.

      (v) Worldwide deregulation of telecommunications  markets. During the past
   decade many countries have liberalized  their  telecommunications  markets in
   order to permit new  competitors to provide  facilities  and services.  These
   changes have been particularly apparent in Europe, where Orion

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   currently has the ability to deliver  network  service to and among points in
   27  countries.  Deregulation  is also  creating new  competitors  to national
   telecommunications  companies, which represent potential additional customers
   for the Company's services.

      (vi)  Continuing   technological   advancements.   The  following   recent
   technological  advances are  expected to increase  capacity,  efficiency  and
   demand for satellite services:

   1. High Power  Satellites.  The ability of service  providers to deliver high
quality  services  directly to customer  premises has greatly  improved with the
development of high power  satellites.  Older,  lower power  satellites  require
large, expensive earth stations to receive transmissions.  Typically these earth
stations  were located  outside  urban areas and required  interconnection  with
public telephone systems. High power satellites, such as Orion 1, enable the use
of small,  inexpensive  VSAT earth  stations that may be installed at a customer
location,   thereby  reducing  customer  costs  and  bypassing  all  terrestrial
facilities.

   2. Meshed  Network  Services.  Traditional  VSAT  networks  employ a hub/star
architecture  anchored by an  expensive  hub earth  station  that  controls  the
network  and  communicates  with  each of the  VSATs.  Recent  advances  in VSAT
technology  have led to the creation of fully meshed  satellite-based  networks.
These networks offer less transmission  delay than hub/star networks by enabling
any network node to communicate with any other network node directly through the
satellite without having to transmit through a central network control point.

   3. Frame Relay.  The Company  believes that despite rapid advances in network
services and application software,  many companies hesitated to implement meshed
data networks due to high overhead costs  generated by  descriptive  and routing
commands  required  to travel  with the data  traffic.  Frame  relay  technology
reduces the number and  complexity of commands  needed to send data, and enables
companies to implement more cost-effective  meshed networks.  To meet customers'
demands for fully meshed frame relay network services, the Company has developed
its VISN service.

   4. Compressed Digital Video. CDV technology is designed to compress up to ten
high-quality video channels in the same bandwidth that previously carried one or
two analog channels. This technology is creating a rapid expansion in the number
of available video channels with improved  transmission  quality. CDV lowers the
per-channel  cost of delivering  programming via satellite and cable  television
systems,  thereby  enabling more  programming  options to be provided to smaller
markets.  The  Company  believes  that CDV will enable  continued  growth in the
number of video channels and also accelerate broadcasters' efforts to distribute
their  programming  internationally.  The Company  also  believes  that CDV will
result in higher total revenues per  transponder as more customers can be served
per  transponder.  However,  CDV may  also in  effect  increase  the  supply  of
satellite  transponders,  causing prices to decline.  See "Risk Factors -- Risks
Relating  to Orion's  Business --  Potential  Adverse  Effects of  Competition."
Although CDV is just  beginning to be adopted in the  industry,  as of September
30, 1996, approximately 63% of Orion's video customers used CDV technology. 

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ORION SERVICES

   Orion provides  satellite-based digital communications services comprised of:
(i)  private  network  services  for  multinational  business  and  governmental
customers,  (ii)  Internet  backbone  and access  services  and (iii)  satellite
transmission  capacity  services,  including  video  distribution  services  for
broadcasters, news organizations and international carriers. As indicated by the
charts below,  61% of revenues are derived from the sale of satellite  capacity,
primarily  for  video.  However,  62% of  bookings  for the  nine  months  ended
September 30, 1996 were from private network and Internet services.  The Company
believes  these  figures are  consistent  with its strategy of building a stable
base of revenues through sales of transmission capacity and then focusing on the
delivery of value-added private network services to end-users.





                                   [DIAGRAM]
   
- ----------
   * Bookings  represent new customer  contracts executed during the period. See
"Risk Factors -- Risks Relating to Orion's Business -- Uncertainties Relating to
Backlog."

   PRIVATE COMMUNICATIONS NETWORK SERVICES

   International  Leased  Line  Services.   Orion's  international  leased  line
services include Digital Link and Digital  Channelized Link. Digital Link can be
designed as a  "point-to-point"  private  network  service  directly  connecting
customer locations or as a  "point-to-multipoint"  service for customers seeking
to transmit  communications  from a central  location to numerous  remote sites.
Orion also offers  Digital  Channelized  Link, a multiplexed  version of Digital
Link that integrates  digitally  compressed  voice,  fax and data traffic into a
single  channel.  Digital Link and Digital  Channelized  Link services have been
offered by Orion since 1993. International leased line services have constituted
a majority of Orion's  bookings of private  communications  network  services to
date.  Customers  typically connect between three and nine sites with data rates
generally of 128 Kbps or greater.

   One  customer,  a  major  multinational  consumer  goods  company,   required
voice/fax and data  connectivity from nine offices in Central and Eastern Europe
and the company's  U.S.  headquarters,  utilizing data speeds of up to 128 Kbps.
The  sites  are  manufacturing  centers  for the  customer's  soap and  toiletry
products.  The customer was seeking a "one-stop shopping" solution which allowed
for simultaneous  exchange of all of its voice/fax and data  applications over a
single  network  provided  by single  network  service  provider.  The  customer
investigated  two  alternative   networking  solutions  and  selected  satellite
connectivity provided by Orion over terrestrial facilities provided by the local
PTT's due to superior  quality.  The customer uses Orion's  service for managing
inventory and "just-in-time" order entry.

   International  Data Networking  Services.  Orion's  fully-meshed  frame relay
based  international data networking  service,  "Virtual Integrated Sky Network"
("VISN"),  allows  customers  to  transmit  and  receive  voice,  fax  and  data
communications,   including   intranet   services,   among  multiple   locations
simultaneously. VISN was developed by Orion and produced by Nortel Dasa (a joint
venture among  Northern  Telecom,  Dornier GmbH, and Daimler Benz Aerospace AG).
The first phase of this service became available to customers  commencing in the
third quarter of 1995, and subsequent phases of the service 

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have been introduced  during 1996 and are expected to be introduced during 1997,
including  the  addition  of  video  teleconferencing.   VISN  offers  customers
bandwidth on demand for data,  voice and fax and,  following the introduction of
in-process and future releases,  customers will have the option to be charged on
a "pay per use" basis (e.g., minutes of use for voice and volume for data). VISN
employs TDMA technology,  which will enable networks to send both voice and data
concurrently  and further  increase the effective  bandwidth  available for data
transmission.  The VISN  product  was  awarded  "Best New  Transport  Technology
Product" at the 1995 ComNet New Product  Achievement  Awards  Competition.  Most
customers have between four and ten sites, and generally have minimum data rates
with the ability to use substantially greater bandwidth for bursts of traffic.

   A VISN customer,  Creditanstalt  Bankverein,  Austria's  second largest bank,
needed a voice and data network among all of its branches in Central and Eastern
Europe. Data applications  varied from electronic mail to transfer  transactions
to its  centralized  data center in Vienna,  along with voice  requirements  for
interoffice   telephone   calls  and   facsimile   transmission.   Creditanstalt
investigated  terrestrial  leased  line and  dial-up  services  to  satisfy  its
requirements.  Orion's VISN service  offered  full meshed,  frame relay  network
service which  supports both  voice/fax  and data  transmission  simultaneously.
Creditanstalt  replaced  its  terrestrial  network with a nine site VISN network
using data speeds of up to 256 Kbps.

   INTERNET BACKBONE AND ACCESS SERVICES

   The  Company  believes  that the rapid  growth of the  Internet  has  created
substantial  opportunities  for Orion.  First,  the United States has become the
residence of the majority of the world's Internet content. Companies are looking
for reliable, wide bandwidth connections which bypass congested Internet network
segments. Orion's transatlantic capacity is well suited for companies in Europe,
including Internet Service Providers ("ISPs"),  seeking high-speed access to the
U.S.  Internet.  Second,  the Internet has begun to evolve from a user  centered
"pull" environment (users requesting information) to a content provider centered
"push" environment  (information delivered to users without concurrent request).
Broadly distributed entertainment,  information and advertising via the Internet
are well suited for broadcast,  point-to-multipoint  communications  facilities,
such as satellite.  By using  satellite  broadcasts to transmit the most popular
Internet content to regional locations,  ISPs can reduce their costs and relieve
network  congestion.   Finally,   Internet  data  communications  are  typically
asymmetric.  A typical, large Internet data transmission is predicated by a user
request  that  comprises  only a few  bytes  of  traffic.  This  interaction  is
inefficient when carried over terrestrial full-duplex networks,  which carry the
same  capacity in both  directions.  Orion's  satellite  based  solutions can be
designed  with  different  amounts of capacity in each  direction,  providing an
inexpensive  circuit for user  requests and  high-speed,  reliable and available
capacity for the data that flows back to the user.

   Although Orion's Internet services were introduced only in the second quarter
of 1996, sales of such services  constituted 16% of new service bookings for the
nine months  ended  September  30, 1996.  Orion  offers  three  Internet-related
services, described below.

   ISP Backbone  Service.  Orion's  DirectNet I service is designed for European
ISPs.  The  service  combines a  dedicated,  high speed  point-to-point  circuit
between the ISP's points of presence in Europe and the North  American  Internet
through a dedicated,  fully  redundant  backbone  connection.  Orion also offers
additional  features with its  DirectNet I service,  including  24-hour  network
monitoring,  control and support and a 99.5% network availability  guarantee and
associated  downtime  credits.  Orion is pursuing  requirements or joint venture
arrangements  with ISPs in which  all of their  transatlantic  traffic  would be
carried over Orion 1 as it develops.  For example, Orion has an arrangement with
PSINet  Inc.  in which Orion has agreed to serve as the  supplier  for  PSINet's
backbone,  connecting  PSINet's various points of presence in Europe to the U.S.
Internet backbone. Orion's ISP customers include, for example, companies such as
Global  Ukraine,   an  ISP  based  in  Kiev.   Global  Ukraine  sought  Internet
connectivity  to the United States  backbone with advanced  technical  features.
Orion now  provides  Global  Ukraine with a 256 Kbps circuit from the Ukraine to
the United  States with a  connection  into the U.S.  Internet at three  network
access  points,  providing  route  diversity  and ensuring fast response time by
avoiding points of potential network congestion. Orion does not expect DirectNet
I to generate a material portion of its revenues.

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<PAGE>

   Corporate  Internet  Access.  Orion's  DirectNet  II  service  is  offered to
international corporations requiring high volume data transmission in connection
with  World  Wide  Web  browsing  and  downloading.   DirectNet  II  provides  a
point-to-point circuit between the North American Internet and the corporation's
premises.  Orion offers large corporations  Internet access service by reselling
the Internet  access  services of several  large ISPs,  such as DIGEX and UUNet.

   Multicast  Satellite-Based  Internet Services.  Orion recently introduced its
WorldCost  service which allows ISPs or corporate users to significantly  reduce
Internet  bandwidth  and  ground  facility  costs.  The  service  is based on an
asymmetric architecture which couples wide bandwidth satellite broadcasting with
narrow bandwidth terrestrial links to the Internet.  Furthermore,  WorldCost can
provide a single channel that is shared among multiple ISPs,  which can remove a
significant  amountof  traffic from ISP  terrestrial  networks.  The Company has
recently  taken  orders  from  customers  but is  not  currently  providing  any
customers with this service.


   VIDEO DISTRIBUTION AND OTHER SATELLITE TRANSMISSION SERVICES

   Orion provides  transmission  capacity to cable and  television  programmers,
news and information networks,  telecommunications  companies and other carriers
for a variety of applications.  Approximately two-thirds of Orion's transmission
capacity  services  consist of video services.  The Company offers  transmission
capacity  services under long term  contracts,  with  approximately  35% of such
services being under contracts of three years or less, 14% being under contracts
of  approximately  four to six years in  duration  and  approximately  51% being
delivered  under  longer  term  contracts  (such  percentages  being  based upon
contract values).  The remainder consists principally of occasional use services
for periods of up to a few hundred hours.

   Video   Services   --   Contribution:    Orion's   video   services   include
"contribution,"  the  long-distance  transport of video signals  (usually one or
more  television  channels) to one location.  Viacom has leased capacity for one
channel on Orion 1 for the purpose of occasional or full time  transmission  for
video  programming from its U.S.  facilities to a broadcast  facility in London.
From  there it can be  inserted  into  programming  and  rebroadcast  in Europe.
Orion's  contribution  services also include  transport of news  programming for
RTL, a major commercial broadcast network in Germany. RTL needed to interconnect
its various news bureaus in Germany and the U.S. to transmit news stories to its
headquarters  in  Koln.  Orion  provided  24 MHz of  transatlantic  transmission
capacity  service  allowing  transmission  of RTL's  programming  in  compressed
digital video format. 

   Video Services -- Distribution:  Cable and television programmers use Orion's
satellite  transmission  services for distribution of television  programming to
local  broadcast  stations,   cable  head-ends,   MMDS  (multichannel  microwave
distribution) systems and SMATV (satellite master antenna television). Orion has
a joint  marketing  agreement  with NTL, which operates one of the largest video
gateways in Europe,  located in downtown London. Orion and NTL offer programmers
uplink,  compression and  distribution to cable head-ends  throughout the United
Kingdom and to locations in Europe.  Orion's ability to offer video distribution
services is aided by the  transponder  switching  capabilities of Orion 1, which
are (and those of Orion 2 and Orion 3 are  expected  to be)  designed  to permit
programs to be distributed  simultaneously  throughout the satellite's  coverage
area.

   Orion's video distribution customers include Black Entertainment  Television,
Inc.  ("BET"),   which  was  seeking  a  video  distribution   service  for  the
distribution  of its  BET On  Jazz  International  Network,  an  internationally
distributed  programming  network  dedicated  to  international  Jazz and  Blues
artists.  BET required  receipt of its signal at its headquarters in Washington,
D.C., conversion to a European TV standard, digital compression and uplinking of
the compressed  digital video signal for  distribution to cable head ends in the
United Kingdom and other sites in Europe.

   News and Special Events:  Orion 1 is used for  transmission of special events
or remote  feeds to  international  news bureaus  from  television  stations and
on-location  mobile  transmitters.  Because Orion's Ku-band  technology and VSAT
ground segment infrastructure offers high reception sensitivity,  the Company is
especially  effective in transmitting  television  signals sent from low-powered
portable trans-

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<PAGE>


mitters  typically  used by news  organizations  and  program  distributors.  In
contrast  to  video   contribution   services,   news  and  special  events  are
characterized by occasional use rather than long-term  capacity  contracts.  CNN
selected Orion's service for its coverage of Bosnia,  and Orion provided service
to the European Broadcasting Union for coverage of the Olympics in Atlanta.

   International  Carriers:  Orion satellite  transmission  services are used by
international  carriers to provide backup for  terrestrial  lines and to provide
communications   services   to   areas   with   inadequate    telecommunications
capabilities.  These  carriers  resell  Orion's  capacity  as part of their  own
services.

   Capacity  Sales:  Orion  sells bulk  capacity  to  resellers  who use Orion's
transmission capacity as one component of a customer's end-to-end communications
solution.  For example, Orion currently sells capacity to a number of firms that
resell Orion's capacity to governmental organizations.

   Orion offers a range of value-added  services in  conjunction  with its video
distribution  and other  satellite  transmission  services.  Such  services  may
include  the  provision  of video  uplinking  and  receiving  stations,  digital
compression  equipment  and  software,   transmission  monitoring,  and  gateway
interconnection services.

CUSTOMERS AND BACKLOG

   Customers.  As of September 30, 1996,  Orion had entered into  contracts with
167 customers, principally large multinational corporations,  European companies
and governmental  agencies.  These entitles come from many different industries,
including communications,  broadcasting,  manufacturing, government, banking and
finance,  energy, lottery,  consumer distribution,  Internet access services and
publishing. Selected customers from each service area are set forth below. 

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<PAGE>


                           SELECTED ORION CUSTOMERS

Private Network Services:        AT&T                     Deere & Company
 Digital Link/Digital            Amoco                    EDS
 Channelized Link                Amway                    GE Americom
                                 Chase Manhattan Bank     Global One
                                 Citibank                 News International
                                                          Limited
                                 Concert                  Westinghouse 


Private Network Services:        Balluff & Co.            Pepsi Cola
 VISN                            Creditanstalt            Price Waterhouse


Internet-related                 Am. Univ. of Bulgaria    LV Net Teleport
                                 Banknet                  Spectrum
                                 BITS                     Terminal Bar
                                 Datac                    TSSA Nask
                                 Global Ukraine


Video Transmission and Other     AsiaNet                  Hughes Network Systems
                                 Black Entertainment      Hungarian Broadcasting
                                 Television
                                 Bonneville International MCI                   
                                 British Telecom          RTL Television        
                                 CNN                      Telecom Italia        
                                 Comsat                   Viacom International  
                                                                                

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<PAGE>

   More  than  half of  Orion's  customers  are  based in the  U.S.,  but  these
customers have a substantial  majority of their points of service in Western and
Eastern Europe, as indicated in the charts below.

         
                                    [DIAGRAM]


   Orion has entered into a contract with DACOM Corp.,  a Korean  communications
company which provides international and long distance telephone and leased line
services, international and domestic data communications and value added network
services. Under the contract,  DACOM will, subject to certain conditions,  lease
eight  dedicated  transponders  on  Orion  3 for  13  years  for  direct-to-home
television  service and other  satellite  services,  for $89 million  payable in
installments  from  December  1996  through  seven  months  following  the lease
commencement  date of the  transponders.  DACOM has the right to  terminate  the
contract  before March 1997 (and Orion would retain the $10 million  paid) if it
fails to obtain certain approvals. Payments are subject to refund if Orion 3 has
not been successfully launched and commenced of commercial operation by June 30,
1999.  Although  Orion 3 is  scheduled  to be launched in the fourth  quarter of
1998,  there can be no  assurance  that Orion will be able to meet the  delivery
requirement of this contract.

   Backlog.  At September  30,  1996,  Orion had  approximately  $123 million of
contracts  in  backlog   (after  giving  effect  to  the  Exchange  and  related
transactions, which will result in changes to arrangements with Limited Partners
that reduce backlog by approximately $11 million),  as compared to approximately
$95 million at September 30, 1995. The backlog contracts generally have terms of
between three and four years.  Orion presently  anticipates  that at least $86.4
million of its backlog will be realized  after 1997.  Orion has begun to receive
contract  renewals  under  expiring   contracts  (under  some  of  the  earliest
contracts,  which  were  entered  into in 1993).  The size of  contracts  varies
significantly,  depending on the amount of capacity required to provide service,
the  geographic  location  of the  network and other  services  provided.  As of
September 30, 1996, Orion had a VSAT installation backlog of 68. 

   Although many of the Company's  customers,  especially  customers under large
and long-term  contracts,  are large  corporations  with  substantial  financial
resources,  other  contracts  are with  companies  that may be  subject to other
business or  financial  risks.  If  customers  are unable or  unwilling  to make
required  payments,  the Company  may be required to reduce its backlog  figures
(which would result in a reduction in future revenues of the Company),  and such
reductions  could be substantial.  The Company has recently  instituted  tighter
credit policies,  and has taken steps to remove from backlog  arrangements  with
customers who have not taken service or have not made all required payments.  In
the second quarter of 1996, the Company determined that one large customer under
a long-term contract (accounting for backlog of approximately $19.9 million) was
not likely to raise  necessary  financing  to  commence  its service in the near
future,  and accordingly the Company no longer  considers such contracts part of
its backlog.  Also in the second quarter of 1996,  the Company  removed from its
backlog contracts with a customer  (accounting for backlog of approximately $4.5
million)  which had ceased  paying  for the  Company's  services.  In the fourth
quarter of 1996, the Company  removed $10.4 million from its backlog  related to
contracts under which customers  failed to use the contracted  service or failed
to make timely payment.  The Company's contracts commence and terminate on fixed
dates.  If the Company is delayed in commencing  service or does not provide the
required service under any particular  contract,  as it has occasionally done in
the past, it may not be able to recognize all the revenue it initially  includes
in 


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<PAGE>

backlog under that  contract.  In addition,  the current  backlog  contains some
contracts  for the  useful  life of  Orion 1; if the  useful  life of Orion 1 is
shorter  than  expected,  some  portion of backlog  may not be  realized  unless
services  satisfactory  to the customer can be provided over another  satellite.
See "Risk  Factors  -- Risks  Relating  to  Orion's  Business  --  Uncertainties
Relating to Backlog."

SALES AND MARKETING

   Orion uses both direct and indirect sales channels. Orion markets its private
communications  network  services and Internet  services  through  direct sales,
local  representatives  and  distributors  in Europe and the United States,  and
wholesale   arrangements  with  major  carriers,   Internet  service  providers,
resellers  and systems  integrators.  Orion markets its video  distribution  and
other satellite transmission services primarily through direct sales. Orion also
has established  arrangements  with local companies in most countries within the
Orion 1 footprint to assist Orion with selling  efforts and to provide  customer
support and network maintenance functions in those countries (as discussed below
under the caption "Network Operations; Local Ground Operators").

   Orion  generally will enter into a single  contract with  customers  covering
service to a number of  countries.  Orion offers the business  customer a single
point-of-contact,  a single contract and a price for its entire  network,  which
Orion believes  constitutes true "one-stop  shopping." Orion prices its services
centrally,  using a single,  easily  administered set of pricing  procedures for
customer networks.

   Marketing  will be critical to Orion's  success.  However,  Orion has limited
experience in marketing,  having  commenced full commercial  operations in 1995.
Orion's marketing program until recently  consisted of direct sales using a U.S.
based sales force and indirect sales channels,  including  Limited Partner sales
representatives,  for sales in Europe. The majority of Orion's contract bookings
to date have been  generated by its direct sales force.  Certain of its indirect
sales channels in Europe have not met expectations. Orion has been significantly
increasing its direct sales capabilities in Europe, particularly with respect to
sales of private communications  network services.  Although Orion believes that
the increase in its European  sales  capabilities  will  increase its  bookings,
there can be no assurance regarding the timing or amount of such increase. Sales
of Orion's services  generally  involve a long-term  complex sales process,  and
Orion's  bookings  have  fluctuated  significantly.  See "Risk  Factors -- Risks
Relating to Orion's  Business  -- Risks  Relating  to  Potential  Lack of Market
Acceptance and Demand; Ground Operations."

   The  Company  may from time to time  enter  into  joint  ventures  or acquire
businesses  which  provide it with  additional  customers  or which  enhance its
marketing  capabilities.  Although the Company is presently considering one such
possible acquisition, it does not have binding arrangements at the present time.
The Company  believes that such  acquisition,  if consummated,  would not have a
material  effect on the Company.  See "Risk Factors -- Risks Relating to Orion's
Business -- Risks Concerning Ability to Manage Growth."

DIRECT SALES

   Orion has  assembled a direct  sales force of 31 as of December  15, 1996 (as
increased from 26 at June 30, 1996) full-time employees in the United States and
Europe to offer its private  communications  network and satellite  transmission
services. Approximately 68% of the sales force is based in the United States (in
Maryland) and approximately 32% is based in Europe. Orion expects to continue to
expand its sales  force  significantly  throughout  1997,  both in the U.S.  and
Europe.

INDIRECT SALES CHANNELS

   Representatives/Distributors.  Orion  has  entered  into  agreements  for the
marketing of its private  communications network services in the United Kingdom,
France, Germany,  Austria, Italy and other European countries.  These agreements
call  for  sales,   marketing  and  customer   support   services  in  specified
geographical areas, generally on a non-exclusive basis. Generally,  the duration
of these agreements is three years.  Third party sales  representatives  receive
commissions and fees for sales and customer support services,  each of which are
payable  over the life of the customer  contracts to which the  representative's
services  relate  and  which  are  based  upon  the  revenues   derived.   Sales
representatives are

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<PAGE>

supervised by Orion sales managers,  who establish marketing strategies with the
representatives,   establish  pricing,   attend  certain  sales  calls,  develop
marketing  materials  and sales  training  tools,  coordinate  joint  efforts in
promotional  events and provide  information about Orion's services.  Orion also
provides engineering support to its sales  representatives.  Orion provides some
of  these   functions  to  support  the  sales  efforts  of  its   distributors.
Distributors  purchase  Orion's  services at  wholesale  prices and resell those
services to  customers at prices  determined  by the  distributors.  Two Limited
Partners who serve as sales  representatives (and ground operators) are entitled
to receive  additional  commissions  under a "profit  sharing"  formula based on
their overall  contribution  to sales,  but no amounts have been paid under such
formula  to  date.   Orion   expects   that  unless   Limited   Partners   sales
representatives  increase their sales  significantly,  payments under the profit
sharing arrangement will be minimal.

   Major  Carriers and Other  Wholesalers.  Orion has entered  into  distributor
resale arrangements with major carriers, teleport operators, resellers and other
companies in the United States and internationally. These distributors typically
purchase  communications network services from Orion (primarily the Digital Link
and Digital Channelized Link and to a lesser extent the DirectNet services) at a
wholesale rate for resale to their customers. This represents an important sales
channel for the  Company,  and the Company is  focusing on  strengthening  these
relationships.  Major  carriers  employ  substantial  sales  forces and have the
advantage of being existing providers to many of Orion's target customers, which
makes marketing easier and increases awareness of customer needs. 

NETWORK OPERATIONS; LOCAL GROUND OPERATORS

   Orion  has  a  centralized  network  operations  function  at  its  corporate
headquarters  in  Rockville,  Maryland,  supported  by  arrangements  with local
companies in most  countries  within the Orion 1 footprint who assist Orion with
selling  efforts  and  providing   customer  support  and  network   maintenance
functions. Orion's relationships with ground operators are critical to providing
integrated service because ground operators obtain necessary  licenses,  install
and maintain the customers' networks, provide in-country business experience and
often facilitate market entry.

   Network Operations.  Once Orion enters into a contract with a customer, Orion
finalizes the design of the customer's network,  acquires the required equipment
and  arranges  for the  installation  and  commissioning  of the  network.  Upon
commencement  of service,  Orion also monitors the  performance  of the networks
through its U.S.  based  network  management  center,  located at its  corporate
headquarters in Rockville,  Maryland, and from facilities in Europe. The network
management  center  allows Orion to perform  diagnostic  procedures  on customer
networks and to reconfigure  networks to alter data speeds,  change  frequencies
and provide additional bandwidth.

   Ground Operators.  Through arrangements with 30 local ground operators, Orion
currently has the ability to deliver network services (through Orion 1 or leased
capacity on other satellites) to or among points in 27 European  countries,  the
United States and Mexico  (which  comprises  substantially  all of the countries
within the coverage area of Orion 1), as well as arrangements to deliver network
services  in  certain  other  Latin  American  countries.  The  ground  operator
agreements call for  installation  and maintenance of VSATs and other equipment,
customer support and other functions in designated geographical areas, generally
on a non-exclusive  basis.  Generally,  such ground  operations  agreements last
three years.  Orion coordinates  ground operations  services  (including service
calls) by its local agents through centralized  customer service centers located
at Orion's corporate headquarters and at its facilities in Amsterdam. Orion also
provides  its ground  operators  with  installation  and  maintenance,  training
materials and support.  Ground  operators  receive fixed fees for  installation,
maintenance  and other  services,  which vary depending on the level of services
and the geographic area.  Certain ground operators receive payments for customer
support over the life of the related customer contract,  based upon the revenues
derived. Two Limited Partner ground operators are entitled to receive additional
fees under a profit  sharing  formula,  but no amounts have been paid under such
formula  to  date  and  Orion  expects  that,   unless  such  Limited   Partners
significantly  increase the number of VSATs they  maintain on behalf of Orion or
Orion's customers,  profit sharing payments will be minimal.  Orion's operations
will  continue to depend  significantly  on Orion  being able to provide  ground
operations for private network services using  representatives  and distributors
throughout the footprint of Orion's satellites. In the event that its network of
ground  operators  is not  maintained  and  expanded,  or  fails to  perform  as
expected,  Orion's 

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<PAGE>
ability to offer private  network  services will be impaired.  See "Risk Factors
- --Risks  Relating to Orion's  Business -- Risks  Relating to  Potential  Lack of
Market Acceptance and Demand; Ground Operations."

   Set forth below is a map showing the locations of Orion's  existing  European
ground operators and potential new ground operators.

[DOCUMENT  CONTAINS A MAP OF EUROPE  INDICATING WHERE ORION HAS GROUND OPERATORS
AND WHERE ORION IS NEGOTIATING THE HIRING OF ADDITIONAL GROUND OPERATORS]

MIGRATION PLAN FOR NEW MARKETS

   Prior  to the  launch  of  Orion  1,  the  Company  began  providing  private
communications network services to customers over satellite capacity leased from
others.  This early market entry strategy is being extended to Latin America and
Asia with the execution of the Orion 2 Satellite  Contract and  commencement  of
construction  of  Orion 3 in  December  1996.  By  developing  an  early  market
presence, Orion builds its customer base, establishes  relationships with ground
operators  and becomes  familiar with the  regulations  and practices in its new
markets  prior to launch of its  satellites.  Upon the  launch of Orion 1, Orion
migrated its customer base to its own satellite, and Orion expects to pursue the
same approach for Orion 2 and Orion 3.

   In Latin America,  the Company has a relationship  with a ground  operator in
Mexico and is currently  providing service to customers in Mexico,  Colombia and
Paraguay over leased  capacity.  The Company intends to migrate such services to
Orion 2 after it commences operations,  as Orion did with its Orion 1 satellite.
The Company has three U.S.  based direct sales  personnel  focused on selling in
Latin  America,  and is  pursuing  relationships  with  other  potential  ground
operators and joint venture partners.

In Asia, the Company has assigned two full time personnel to pursue arrangements
with potential  ground operators and joint venture  partners,  and has commenced
discussions with such entities in a number of Asian  countries.  Orion has begun
the process of identifying  potential sales  representatives in countries within
the Orion 3  footprint.  The Company has also begun  discussions  with  existing
customers who have operations within the Orion 3 footprint and have expressed an
interest in procuring  Orion's  services in Asia.  Orion has started to identify
other  potential  multinational  and Asia-based  customers,  and plans to open a
regional  office in Asia in the second  half of 1997.  The  Company  expects its
marketing for Orion 3 will be assisted by the $89 million pre-construction lease
by DACOM, a Korean  communications  company,  of eight of Orion 3's transponders
for direct-to-home  service and other satellite services. See "-- Implementation
of the Orion Satellite System -- Orion 3 -- Pre-Construction Customer."

IMPLEMENTATION OF THE ORION SATELLITE SYSTEM

   Orion currently provides its services with Orion 1 and with facilities leased
from  other  providers   covering  areas  outside  the  satellite's   footprint.
Ultimately  the Company  will  provide  these  services  with three  satellites,
together with  facilities  leased  outside of its  footprints.  Orion 1 provides
coverage of the Northern  Atlantic  Ocean region.  Orion 2 is being  designed to
cover the Atlantic  Ocean region but with coverage of points  further East (into
the  Commonwealth  of  Independent  States) and South  (into  Latin  America and
Africa), and Orion 3 is being designed to cover the Asia Pacific region.

   The design,  construction,  launch and in-orbit  delivery of a satellite is a
long and capital-intensive  process.  Satellites comparable to Orion's typically
cost in excess of $200 million  (exclusive of  development,  financing and other
costs)  and take two to three  years to  construct,  launch  and place in orbit.
Prior to  launch,  the owner  generally  must  obtain a number of  licenses  and
approvals,  including approval of the host country's national telecommunications
authorities to construct and launch the satellite, coordination and registration
of an orbital  slot (of which  there are a limited  number)  through  the ITU to

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<PAGE>

avoid  interference  with other  communications  systems and a  consultation  on
interference  with INTELSAT  (and EUTELSAT in the case of European  satellites).
Obtaining the necessary consents can involve  significant time and expense,  and
in the case of the  United  States,  requires  a showing  that the owner has the
financial  ability to fund the  construction  and launch of the satellite and to
operate  for one year.  The Company has  commenced  construction  of Orion 3 and
plans to  commence  construction  of Orion 2 prior to receipt of all  regulatory
approvals.  Failure  to  obtain  such  approvals  prior to launch  would  have a
material  adverse effect on the Company.  See "Risk Factors -- Risks Relating to
Orion's Business -- Approvals  Needed;  Regulation of Industry" and "Regulation"
below.

   Orion 1 is  expected to have an in-orbit  useful life of  approximately  10.7
years, estimated to end in October 2005, and Orion 2 and Orion 3 are expected to
have in-orbit  useful lives of 13 years and 15 years,  respectively  (based upon
present  design).  While there can be no assurances that adequate  financing and
regulatory  approvals  will be  obtained,  Orion  plans  to  launch  replacement
satellites as its satellites reach the end of their useful lives.

     ORION 1

   Orion 1 was launched in November 1994 and commenced commercial  operations in
January 1995.

   Satellite Design and Footprint.  Orion 1, which is in geosynchronous orbit at
37.5|SD West  longitude,  is a high power Ku-band  telecommunications  satellite
that contains 28 transponders of 54 MHz bandwidth and six transponders of 36 MHz
bandwidth  (although  one of these  transponders  has not operated in accordance
with  specifications,  as described  below).  The  footprint of Orion 1 is shown
below  (although  certain  transponders  of Orion 1 can be reconfigured to match
changing business and telecommunications requirements).

                                    [DIAGRAM]

   Satellite  Construction  and  Performance.  Orion 1 was  constructed by Matra
Marconi Space's subsidiary MMS Space Systems Limited, one of the major satellite
contractors in Europe.  Orion 1 was designed both for the delivery of high-speed
data and for  high-powered  digital video  transmission  to corporate  users. In
particular, Orion 1 was designed with high reception sensitivity,  which enables
two-way  transmission  from and to small earth stations,  reducing the equipment
and  transmission  cost  to  customers.  Orion  1 has  transatlantic  networking
capability, which allows users to uplink data in the U.S. or Europe and downlink
that transmission simultaneously to the U.S.
and Europe.

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<PAGE>

   This configuration  simplifies customers' transatlantic networking solutions.
Orion  believes  that  Orion 1's  Ku-band  technology  and VSAT  ground  segment
infrastructure  is among the least  expensive,  most flexible  technologies  for
interactive  satellite  transmissions  in the North Atlantic  market.  Like most
recent satellites, Orion 1 offers digitally compressed transmission, in addition
to analog transmission, which allows the satellite to increase by up to ten fold
its usable bandwidth per transponder, leading to greater revenue per transponder
and greater network availability to customers in need of bandwidth on demand.

   When Orion 1 was delivered into orbit,  one of the 36 MHz  transponders  with
coverage  of the United  States  did not  perform in  accordance  with  contract
specifications.  Orion settled the matter with the  manufacturer  for a one time
refund of $2.75  million  (which  amount was applied as a  mandatory  prepayment
under the existing Orion 1 Credit Facility).  In addition, the manufacturer will
pay Orion approximately $7,000 per month for the life of the satellite under the
warranty to the extent the  transponder is not used to generate  revenue.  Orion
believes  that the failure of such  transponder  to perform in  accordance  with
specifications  will not have a significant  impact on Orion's  ability to offer
its services.

   In November 1995, one of Orion 1's components supporting nine transponders of
dedicated  capacity  serving  the  European  portion  of the Orion 1  footprint,
experienced  an anomaly  that  resulted  in a  temporary  service  interruption,
lasting  approximately  two hours.  Full service to all affected  customers  was
restored using  redundant  equipment on the satellite.  The redundant  equipment
currently generates a majority of Orion's revenues. Orion believes, based on the
data  received  to date by  Orion  from  its own  investigations  and  from  the
manufacturer,  and  based  upon  advice  from  Orion's  independent  engineering
consultant,  Telesat Canada, that because the redundant component is functioning
fully in accordance with  specifications  and the performance  record of similar
components is strong,  the anomalous behavior is unlikely to affect the expected
performance of the satellite over its useful life.  Furthermore,  there has been
no effect on Orion's ability to provide services to customers.  However,  in the
event that the redundant component fails, Orion 1 would experience a significant
loss of usable  capacity.  In such  event,  while  Orion  would be  entitled  to
insurance  proceeds of  approximately  $47  million and could lease  replacement
capacity  and  function  as  a  reseller  with  respect  to  such  capacity  (at
substantially reduced gross margins), the loss of capacity would have a material
adverse effect on Orion. See "Risk Factors -- Risks Relating to Orion's Business
- -- Risks of Satellite Loss or Reduced Performance." 

   Control of Satellite. Orion uses its tracking, telemetry and command facility
in Mt.  Jackson,  Virginia (the "TT&C  facility") to control Orion 1, and has in
place backup facilities at its headquarters in Rockville, Maryland. In addition,
Orion has a  satellite  control  center at Orion's  headquarters  in  Rockville,
Maryland,  from  which  commands  can be sent  to the  satellite,  directly,  or
remotely  through  the TT&C  facility.  Orion  also has  constructed  a  network
management  center at its headquarters to monitor the performance of Orion 1 and
to  perform  diagnostic  procedures  on and to  reconfigure  its  communications
networks.  Orion leases  additional  facilities  in Europe for backup  tracking,
telemetry and command and network monitoring functions.

   ORION 2

   Schedule and Footprint. Orion intends to launch Orion 2 in the Atlantic Ocean
region to bolster its European  capacity and to expand its coverage  area in the
Commonwealth of Independent States,  Latin America and parts of Africa.  Orion 2
will  be a high  power  Ku-band  communications  satellite  which  will  contain
approximately   30  transponders  of  54  MHz  bandwidth.   Orion  has  obtained
conditional  authorization  from  the FCC for the  orbital  slot at  12|SD  West
longitude  for  operation  of Orion 2. The FCC has  commenced  the  coordination
process  through  the ITU and will  commence  consultation  with  INTELSAT  upon
request from Orion.  Orion currently  plans to commence  construction of Orion 2
immediately  after  completion  of the  Offering  and launch Orion 2 late in the
second quarter of 1999. See "-- Satellite Construction,  Launch and Performance"
and "Risk Factors -- Risks Relating to Orion's Business -- Launch of Orion 2 and
Orion 3 Subject to Significant Uncertainties."

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<PAGE>


                                    [DIAGRAM]


   Satellite Construction,  Launch and Performance.  Matra Marconi Space and MMS
Space  Systems  are the  prime  contractors  for  Orion 2 and will use MMS Space
Systems' EUROSTAR  satellite  platform for Orion 2. This platform was previously
used for Inmarsat 2, Telecom 2, Hispasat and Orion 1.  Lockheed  Martin CLS will
provide launch services for Orion 2 using the Atlas II A-S launch vehicle. Atlas
II A-S,  which is larger than the launch vehicle used for the launch of Orion 1,
is an  expanded  version  of Atlas  II.  All 26 of the Atlas II, II A and II A-S
launches  have been  successful.  There  have been more than 500  Atlas  flights
since the first research and development launch in 1957. For a discussion of the
Company's  financing  needs with  respect  to Orion 2, and  related  risks,  see
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  --  Liquidity  and  Capital  Resources"  and "Risk  Factors -- Risks
Relating  to  Orion's  Business  -- Launch  of Orion 2 and  Orion 3  Subject  to
Significant Uncertainties -- Substantial Financing Requirements."

   The Orion 2  satellite  will be tested  extensively  prior to  launch.  Matra
Marconi  Space is  obligated  to correct  all  defects in the  satellite  or its
components  discovered prior to the launch.  If Orion 2 is launched but fails to
meet the specified  performance criteria following launch, or fails to arrive at
its designated  orbit within 180 days of launch,  or is completely  destroyed or
incapable of operation, Orion 2 will be deemed a "constructive total loss." Upon
a constructive total loss of Orion 2, Orion would generally be entitled to order
from Matra Marconi Space a replacement satellite on substantially the same terms
and  conditions  as set  forth in the Orion 2  Satellite  Contract,  subject  to
certain pricing  adjustments.  If Orion 2 is  substantially  able to perform but
fails to meet  certain  criteria for full  acceptance,  Orion 2 will be deemed a
"partial  loss."  Upon a partial  loss of Orion 2, Orion  would be  entitled  to
receive  a  partial  refund  based  on  calculations  of Orion  2's  performance
capabilities.  If Orion 2 is not a constructive  total loss or partial loss, but
does not meet the specified performance  requirements at final acceptance or for
five years  thereafter,  Matra  Marconi  Space may be required  to make  certain
refund payments to Orion up to a maximum of approximately  $10 million.  Orion's
principal  remedy in the case of a constructive  total loss or partial loss will
be under the launch  insurance the Company is to obtain. A total or partial loss
will involve delays and loss of revenue,  which will impair  Orion's  ability to
service its  indebt-

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<PAGE>

dness, and such insurance will not protect Orion against business  interruption,
loss or delay of  revenues  or similar  losses and may not fully  reimburse  the
Company for its  expenditures.  See "Insurance" below and "Risk Factors -- Risks
Relating to Orion's  Business -- Risks of Satellite Loss or Reduced  Performance
- -- Limited Insurance for Satellite Launch and Operation."

   The Orion 2 Satellite  Contract provides for incentive  payments to encourage
early  delivery  and  limited  liquidated  damages  payable in the event of late
delivery.  The incentive  payments would equal $25,000 per day for each day that
Orion 2 is delivered prior to the scheduled delivery date. Liquidated damages in
the event of a late  delivery  of Orion 2 also  would be  calculated  on a daily
basis, with the aggregate amount not to exceed approximately $12 million.  These
liquidated  damages would be Orion's exclusive remedy for late delivery,  except
as discussed above.

   Control of Satellite. Orion expects to use the TT&C facility to control Orion
2, and to use its existing network monitoring facilities in Rockville,  Maryland
and backup facilities in Europe.

   There can be no  assurance  that Orion 2 will be launched  successfully.  See
"Risk  Factors -- Risks  Relating  to Orion's  Business -- Launch of Orion 2 and
Orion 3 Subject to Significant Uncertainties."

   ORION 3

   Schedule and  Footprint.  Orion intends to launch Orion 3 in the Asia Pacific
region.  Orion 3 is expected to cover all or  portions of China,  Japan,  Korea,
India, Hawaii, Southeast Asia, Australia, New Zealand, and Eastern Russia. Orion
3 is  expected  to be a  high-power  satellite  with  23 54 MHz  and  two 27 MHz
equivalent Ku-band transponders, 10 36 MHz C-band transponders for use by Orion,
and eight Ku-band transponders to be used by DACOM, a large Asian customer,  for
direct-to-home  television services and other satellite services. Orion, through
the Republic of the Marshall Islands, has filed the appropriate documentation to
begin the ITU process to  coordinate  an orbital slot at 139|SD East  longitude.
Orion has not commenced the  consultation  process with INTELSAT with respect to
such orbital slot.  Orion  commenced  construction  of Orion 3 in December 1996.
Orion 3 is  scheduled  to be launched in the fourth  quarter of 1998.  See "Risk
Factors -- Risks  Relating to Orion's  Business -- Launch of Orion 2 and Orion 3
Subject to Significant Uncertainties."

   For a  discussion  of Orion's  financing  needs with  respect to Orion 3, see
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations  of Orion -- Liquidity  and Capital  Resources"  and "Risk Factors --
Risks Relating to Orion's Business -- Need for Substantial  Additional  Capital"
and "-- Launch of Orion 2 and Orion 3 Subject to  Significant  Uncertainties  --
Substantial Financing Requirements."

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<PAGE>


   The proposed coverage of Orion 3 is shown below.


                                    [DIAGRAM]


   Pre-Construction  Customer.  Orion has  entered  into a  contract  with DACOM
Corp., a Korean  communications  company which provides  international  and long
distance  telephone and leased line  services,  international  and domestic data
communications and value added network services.  Under the contract, DACOM will
lease eight dedicated  transponders  on Orion 3 for 13 years for  direct-to-home
television   service  and   satellite   services,   in  return  for  payment  of
approximately $89 million payable over a period from December 1996 through seven
months following the lease commencement date for the transponders. DACOM has the
right to terminate  the  contract  before March 1997 (and Orion would retain the
$10 million paid) if it fails to obtain certain approvals.  Payments are subject
to refund if the successful  launch and commencement of commercial  operation of
Orion 3 has not occurred by June 30, 1999.  Although  Orion 3 is scheduled to be
launched in the fourth  quarter of 1998,  there can be no  assurance  that Orion
will meet the delivery requirements of this contract. See "Risk Factors -- Risks
Relating  to  Orion's  Business  -- Launch  of Orion 2 and  Orion 3  Subject  to
Significant  Uncertainties -- Timing Uncertainties." As part of the arrangements
with DACOM,  Orion granted  DACOM a warrant to purchase  50,000 shares of Common
Stock at $14 per share.

   Satellite  Construction,  Launch and  Performance.  Orion has selected Hughes
Space as the prime  contractor for Orion 3 and will use a Hughes Space HS 601 HP
satellite  platform  for Orion 3. Launch  services  for Orion 3 will be provided
using the McDonnell Douglas Delta III launch vehicle. Delta III,
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<PAGE>


which is larger  than the launch  vehicle  used for the launch of Orion 1, is an
expanded  version  of the Delta II launch  vehicle  which has had 53  successful
launches  with a  failure  rate of less  than 2%.  There  have been no Delta III
flights to date,  and the  Company  expects its launch to be the third Delta III
flight  based  upon  information  provided  by the launch  vehicle  manufacturer
regarding  its present  flight  schedules.  For a  discussion  of the  Company's
financing  needs with respect to Orion 3, and related risks,  see  "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  --
Liquidity" and "Risk Factors -- Risks Relating to Orion's  Business -- Launch of
Orion  2 and  Orion  3  Subject  to  Significant  Uncertainties  --  Substantial
Financing Requirements."

   Under the proposed Orion 3 Satellite Contract,  the Orion 3 satellite will be
tested  extensively  prior to launch.  Hughes  Space is obligated to correct all
defects in the satellite or its components  discovered prior to the launch.  The
risk of loss or damage to Orion 3 passes from Hughes  Space to Orion at the time
of  intentional  ignition of Orion 3. After  Orion 3 is  launched  and meets the
specified  performance  criteria  following launch,  and has not suffered damage
caused by any failure or  malfunction  of the launch  vehicle,  Hughes  Space is
required  to  perform  in-orbit  testing  of Orion 3 to  determine  whether  the
transponders meet the specified  performance  criteria. If the transponders meet
the specified performance criteria,  Hughes Space is entitled to retain the full
satellite  performance  payments  described  below.  See  "Insurance"  and "Risk
Factors -- Risks  Relating  to Orion's  Business --  Satellite  Risks -- Limited
Insurance for Satellite Launch and Operation." 

   Orion has options to purchase an additional  satellite which may be used as a
replacement  satellite  for  Orion  3 to be  launched  within  12  to 19  months
(depending  on the  option  chosen by  Orion),  with fees for  accelerating  the
construction  after  Orion  places  the order for  completion  of an  additional
satellite.  Hughes Space is obligated  to furnish the  replacement  satellite on
terms  substantially  similar  to  those  contained  in the  Orion  3  Satellite
Contract.

   The Orion 3 Satellite  Contract provides for incentive  payments to encourage
satellite  performance  and limited  liquidated  damages payable in the event of
late delivery.  The incentive  payments could total $18 million depending on the
satellite's  performance,  of which $10 million could be payable upon acceptance
of the Orion 3  satellite  and $8  million  is  payable  over the  course of the
satellite's  operational  lifetime (all of which incentive payments are included
in the contract  price for Orion 3). In the event that it is  determined  during
the  Orion 3's  operational  lifetime  that a  transponder  is not  successfully
operating,  Orion is  entitled  to  receive  payment  refunds  under the Orion 3
Satellite Contract.  Liquidated damages in the event of a late delivery of Orion
3 also would be  calculated on a daily basis,  with the aggregate  amount not to
exceed  approximately  $6 million.  These  liquidated  damages  would be Orion's
exclusive remedy for late delivery.

   Control of  Satellite.  Orion  expects  to lease a  tracking,  telemetry  and
command facility in Asia to control Orion 3 and to maintain backup facilities in
Korea, pursuant to arrangements with DACOM.

   There can be no  assurance  that Orion 3 will be launched  successfully.  See
"Risk  Factors -- Risks  Related to  Orion's  Business  -- Launch of Orion 2 and
Orion 3 Subject to Significant Uncertainties."

ORBITAL SLOTS

   Orion  1:  Orion  has  been  licensed  by  the  FCC  and  has  completed  the
coordination  process with INTELSAT to operate Orion 1 in geostationary orbit at
37.5' West longitude.

   Orion 2: Orion has obtained  conditional  authorization  from the FCC for the
construction,  launch and operation of Orion 2 at 12' West longitude.  On behalf
of Orion,  the FCC has commenced the orbital slot  coordination  process through
the ITU.  Orion believes that its use of the 12' West longitude slot for Orion 2
is not likely to interfere  with  proposed  uses of adjacent  slots filed for by
other governments,  except for a possible overlap of 75 MHz with one such filing
as discussed more fully below under the caption "-- ITU  Coordination  Process."
Orion will  consult with  INTELSAT  regarding  Orion 2, and believes  that since
there are no INTELSAT  satellites  located  adjacent  to the 12' West  longitude
orbital slot, the INTELSAT coordination should be obtained in due course.

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   Orion 3: Orion,  through the Republic of the Marshall Islands,  has filed the
appropriate documentation with the ITU to begin the ITU coordination process for
Orion 3 at 139' East longitude. Based upon the time of filing by the Republic of
the Marshall Islands,  Orion believes that the proposed orbital slot for Orion 3
would have effective priority under ITU procedures with respect to the 139' East
longitude  orbital slot, but some proposals for adjacent slots would be entitled
to priority  over the Company's  proposal  (through the Republic of the Marshall
Islands) with respect to possible interference.  Orion believes,  based upon its
monitoring of the other  proposals  and  information  in the industry  regarding
their  progress,  that none of the entities  with  effective  priority  over the
Company's  proposal  (through the Republic of the Marshall Islands) will be able
to  launch a  satellite  prior to launch  of Orion 3 to take  advantage  of such
priority.  Orion has not commenced the  consultation  process with INTELSAT with
respect  to  Orion 3, but as in the case of  Orion 2  expects  to  complete  the
INTELSAT coordination in due course.

   Other Orbital Slots:  Orion has received an authorization  from the FCC for a
Ku-band  satellite  in  geostationary  orbit  at 47'  West  longitude,  and  has
coordinated  this  orbital  position  with  INTELSAT.  Orion  has also  filed an
application with the FCC to operate a satellite at 126' East longitude.  The FCC
has filed  documentation  with the ITU to commence the coordination  process for
this slot. In May 1996, in response to Orion's application, the FCC assigned the
U.S.  domestic  orbital  location of 135' West  longitude to Orion.  In November
1996, the FCC granted authorization to Orion to utilize the slot, conditioned on
Orion  submitting   financial   qualification   information,   or  documentation
justifying  a waiver of the  financial  requirements,  within 120 days after the
release of the  individual  order with  respect  to Orion's  application.  Orion
presently intends to seek a waiver with respect to this 120 day requirement, but
believes failure to obtain a waiver would not have a material affect on Orion or
its  business.  Such  120  day  requirement  does  not  apply  to  authorization
previously  granted to Orion,  such as for the 12' West  longitude  orbital slot
proposed to be used for Orion 2.

   In September  1995,  Orion filed  applications  for  authority to  construct,
launch  and  operate  Ka-band  satellites  at 78.0' East  longitude,  93.0' West
longitude, and 83.0' West longitude, and an amendment to its pending application
to construct,  launch and operate a Ku-band  satellite at 127' West longitude to
add a Ka-band  payload.  In addition,  Orion filed an  application to modify its
authority  to  construct,  launch and  operate a Ku-band  satellite  at 47' West
longitude  to include a  North/South  beam  configuration.  On November 9, 1995,
Orion filed an  application  for  authority to  construct,  launch and operate a
Ka-band  satellite at 12' West longitude.  In May 1996, the FCC assigned Ka-band
orbital  locations for 33 U.S.  companies for international  orbital  locations,
including two assigned to Orion at 78' East longitude and 126.5' East longitude,
and one at 47' West longitude. This orbital assignment plan was conditioned upon
authorization  of the domestic  portion of the proposed  satellite  systems.  At
approximately the same time the FCC made ITU filings for these  satellites.  The
FCC order does not license these satellites, and some of the applications to use
the orbital assignments are subject to further FCC processing. There are ongoing
negotiations  among the  applicants  concerning  a  consensual  Ka-band  orbital
assignment  plan to be  submitted  to the FCC to  resolve a number  of  mutually
exclusive  orbital  assignment  requests,   including  Orion's  pending  Ka-band
application  for  93.0'  West  longitude,  83.0'  West  longitude  and 127' West
longitude.  The FCC has indicated  that if a consensus  cannot be reached by the
applicants,  the  FCC  will  itself  resolve  these  orbital  conflicts  in  the
processing of these applications, and such processing will be in conformity with
yet-to-be  adopted Ka-band  service rules.  There can be no assurance that Orion
will receive final licenses to operate at these orbital  positions,  or that the
FCC will act favorably on Orion's other satellite filings.

   ITU Coordination  Process. An international  treaty to which the U.S. and the
Republic of the Marshall Islands are parties requires  coordination of satellite
orbital slots through the procedures of the ITU. There are only a limited number
of such  orbital  slots.  ITU  procedures  provide  for a priority  to attach to
proposals that are submitted first for a particular  orbital slot and associated
frequencies,  and provide for  protection  from  interference  by  satellites in
adjacent slots. This priority does not establish  legally-binding rights, but at
a minimum  establishes  certain  procedural  rights and obligations for and with
respect to the party that first submits its proposal.

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   Over  the  past  decade,  a  substantial   increase  in  satellite  proposals
introduced into the ITU coordination  process has caused delays in that process.
In  addition,  many  proposals  are  submitted  to the ITU for  registration  of
satellite systems that ultimately are not constructed or launched.  As a result,
the ITU is  investigating  ways to improve or streamline  the filing process for
registration  of orbital  slots.  In the meantime,  it has become  international
practice for operators who propose to use a certain  orbital slot to investigate
and evaluate  whether  proposals to launch  satellites into the same or a nearby
orbital location are likely to result in actual operation,  and for operators to
negotiate  with other  countries or operators  that propose to use the same or a
nearby  orbital  location.  There  can be no  assurance  of the  outcome  of any
objections  to this  international  practice  or as to the  results of the ITU's
investigations.

   Orion is involved in discussions  with certain  governments  concerning their
proposals to use orbital slots.  While Orion  believes that it can  successfully
coordinate  and  resolve  any  interference  concerns  regarding  the use of the
orbital  locations and frequency  bands  proposed for Orion 2 and Orion 3, there
can be no assurance that this will be achieved,  nor can there be assurance that
ITU coordination will be completed by the scheduled launch dates for Orion 2 and
Orion 3.

   In the event that successful coordination cannot be achieved,  Orion may have
to modify the  satellite  design for Orion 2 or Orion 3 in order to minimize the
extent of any potential  interference with other proposed satellites using those
orbital  locations  or frequency  bands.  Any such  modifications  may result in
certain  features of Orion 2 and Orion 3 differing from those  described in this
Prospectus and may result in limitations on the use of one or more  transponders
on Orion 2 or Orion 3 or delays in the launch of Orion 2 or Orion 3. In order to
achieve successful coordination,  Orion may also have to modify the operation of
the satellites,  or enter into commercial  arrangements  with operators of other
satellites,  in  order  to  protect  against  harmful  interference  to  Orion's
operations.  If interference  occurs with satellites that are in close proximity
to Orion 2 and Orion 3, or with satellites that are  subsequently  launched into
locations in close proximity  without  completing ITU  coordination  procedures,
such  interference  would  have an  adverse  effect on the  proposed  use of the
satellites and on Orion's business and financial performance.  See "Risk Factors
- -- Risks  Relating  to Orion's  Business  --  Approvals  Needed;  Regulation  of
Industry."

INSURANCE

   Orion has obtained satellite in-orbit life insurance for Orion 1 covering the
period  from May 1996 to May 1997 in an  initial  amount of  approximately  $245
million  providing  protection  against partial or total loss of the satellite's
communications capability,  including loss of transponders,  power or ability to
control the  positioning  of the satellite.  The aggregate  premium for in-orbit
insurance for Orion 1 is approximately $6 million per annum.

   Orion intends to procure launch  insurance for the  construction,  launch and
insurance costs of Orion 2 and Orion 3. In the past,  satellite launch insurance
was generally procured  approximately six months prior to launch.  Recently,  it
has become  possible to obtain a commitment  from  insurance  underwriters  well
before that time,  which fixes the rate and certain  terms of launch  insurance.
Orion intends shortly to seek such a commitment  from insurance  underwriters to
provide launch  insurance for Orion 2 and Orion 3. Such insurance is expected to
be quite  costly,  with present  insurance  rates ranging at or above 16% of the
insured  amount,  depending  upon such factors as the launch  history and recent
performance of the launch vehicle to be used and general  availability of launch
insurance in the insurance  marketplace (although such rates have reached 20% or
higher in the past several  years).  Such  insurance  can be expected to include
certain contract terms,  exclusions,  deductibles and material change conditions
that are  customary  in the  industry.  After launch of Orion 2 and Orion 3, the
Company will need to procure  satellite  in-orbit life insurance for Orion 2 and
Orion 3. There can be no assurance that such insurance will be available or that
the price of such insurance or the terms and exclusions in the actual  insurance
policies will be favorable to the Company. Launch and in-orbit insurance for its
satellites will not protect the Company against business  interruption,  loss or
delay of revenues and similar losses and may not fully reimburse the Company for
its expenditures.  Accordingly,  an unsuccessful launch of Orion 2 or Orion 3 or
any significant  loss of performance with respect to any of its satellites would
have a material  adverse  effect on Orion and would  impair  Orion's  ability to
service its indebted-

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ness,  including  the  Notes.  See "Risk  Factors -- Risks  Relating  to Orion's
Business -- Risks of Satellite Loss or Reduced  Performance -- Limited Insurance
for Satellite Launch and Operation."

COMPETITION

   As a  provider  of  data  networking  and  Internet-related  services,  Orion
competes  with a  large  number  of  telecommunications  service  providers  and
value-added  resellers  of  transmission  capacity.  As a provider of  satellite
transmission  capacity,  Orion  competes  with other  providers of satellite and
terrestrial facilities.

   Many of these competitors have significant competitive advantages,  including
long-standing  customer  relationships,  close  ties with  regulatory  and local
authorities,  control  over  connections  to local  telephone  networks and have
financial  resources,  experience,  marketing  capabilities and name recognition
that are  substantially  greater than those of Orion.  The Company believes that
competition in emerging  markets will intensify as incumbent  service  providers
adapt to a competitive  environment and  international  carriers  increase their
presence in these  markets.  The Company also believes that  competition in more
developed markets will intensify as larger carriers  consolidate,  enhance their
international  alliances and increase  their focus on data  networking.  Orion's
ability  to  compete  with these  organizations  will  depend in part on Orion's
ability to price its services at a significant  discount to terrestrial  service
providers,  its  marketing  effectiveness,  its level of  customer  support  and
service and the technical advantages of its systems. 

SERVICE PROVIDERS

   Orion has encountered strong competition from major established carriers such
as AT&T, MCI,  Sprint,  British  Telecom,  Cable & Wireless,  Deutsche  Telekom,
France Telecom and Kokusai Denshin Denwa, which provide international telephone,
private  line and  private  network  services  using  their  national  telephone
networks and link to those of other  carriers.  A number of these  carriers have
formed global consortia to provide private network  services,  including AT&T --
Unisource Services Company (AT&T, PTT Telecom Netherlands, Telia (Sweden), Swiss
Telecom PTT and  Telefonica of Spain),  Concert  (British  Telecom and MCI), and
Global  One  (Sprint,  France  Telecom  and  Deutsche  Telekom).  Other  service
providers  include MFS Worldcom (which acquired IDB  Communications  Group, Inc.
and  Wiltel  International,   Inc.),  Infonet,  SITA,  Telemedia  International,
Spaceline,  ANT Bosch (which is being  acquired by General  Electric),  Teleport
Europe,  Impsat,  and various local  resellers of satellite  capacity.  Finally,
service organizations that purchase satellite capacity,  VSAT and other hardware
and install their own networks may be considered competitors of the Company with
respect to their own networks. Although these carriers and service providers are
competitors,  some are also Orion's  customers.  Orion believes that all network
service  providers are  potential  users of Orion's  satellite  capacity for the
network services they offer their customers. See "Risk Factors -- Risks Relating
to Orion's Business -- Potential Adverse Effects of Competition."

SATELLITE CAPACITY

   Orion  provides fixed  satellite  service and does not intend to compete with
proposed  mobile   satellites  or  low  earth  orbit  systems  ("LEO")  such  as
Globalstar, Iridium or Odyssey (although the Company does expect to compete with
Teledesic,  a proposed LEO  system),  or, with the  exception of the  pre-leased
transponders on Orion 3 to be used for video transmissions,  with direct-to-home
satellite  systems such as  Primestar,  DirectTV or EchoStar.  Mobile  satellite
services are  characterized  by voice and data  transmission  to and from mobile
terminals on platforms  such as ships or aircraft.  Direct-to-home  services are
characterized  by the  transmission  of television  and  entertainment  services
directly to consumers. Orion's satellites will compete with trans-Atlantic fixed
satellite systems, European regional and domestic systems and Asian systems.

   Existing  International and Trans-Atlantic  Satellite Systems. The market for
international  fixed  satellite  communications  capacity has been  dominated by
INTELSAT for thirty years,  and INTELSAT can be expected to continue to dominate
this market for the foreseeable future.  INTELSAT, a consortium of approximately
138 countries established by international treaty in 1964, owns and operates the
largest 

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fleet of commercial geosynchronous satellites in the world (25 satellites,  with
additional  satellites on order).  INTELSAT's  satellites have historically been
general  purpose,  lower-power  satellites  designed  to serve  large areas with
public telephone service  transmitted  between expensive gateway earth stations.
INTELSAT generally provides capacity directly to its signatories who then market
such capacity to their customers.  The availability of new services generally is
subject to the discretion of each  country's  signatory and INTELSAT is required
under its charter to set its pricing in order to achieve a fixed pre-tax  return
on  equity  that  is  established  from  time to time  by  INTELSAT's  board  of
governors.  INTELSAT is considering a restructuring  and it is expected that the
Intelsat Assembly of Parties will decide on a new structure for the organization
in 1997. Any restructuring of INTELSAT that increases its marketing  flexibility
could  materially  impact  Orion's  ability to compete in the market for private
satellite delivered services.

   PanAmSat  currently  operates four satellites,  with one satellite  providing
coverage in each of the  Atlantic  Ocean  region,  the Asia  Pacific  region and
Indian Ocean region (the fourth covers the Atlantic Ocean region but is near the
end of  its  useful  life).  These  satellites  primarily  provide  broadcasting
services,  such  as  television  programming  and  backhaul  operations.  PAS 3,
launched in January 1996, with coverage of the Atlantic Ocean, competes directly
with Orion 1. It has performance  attributes  which are generally  comparable to
those of Orion 1 and carries 16 Ku-band  transponders,  of which 8  transponders
are  capable  of  providing   service  to  or  within  Europe,   and  16  C-band
transponders.  PanAmSat has announced that it intends to launch four  additional
satellites,  two in 1997 that will provide coverage of the U.S., Central America
and Mexico,  and two that will provide  coverage of the Indian and Pacific Ocean
regions,  respectively,  in 1997 and early  1998.  PanAmSat is in the process of
selling a controlling interest to Hughes Electronics Corp., which is the largest
private  space-related  company  in the world.  This  transaction  will  enhance
PanAmSat's ability to compete with Orion.

   Existing European Regional and Domestic Satellite Systems.  In Europe,  Orion
competes with certain regional  satellites systems and may compete with domestic
satellite  systems.  Regional  and domestic  satellite  systems  generally  have
limited  ability  to serve  customers  with  needs for  extensive  international
networks.  Orion's primary  competitor in Europe is the major regional satellite
system operated by EUTELSAT. EUTELSAT,  established in 1977, presently comprises
over  approximately 45 member  countries.  EUTELSAT  operates seven  satellites,
providing telephony,  television,  radio and data services,  and has announced a
plan to launch five new satellites through 1998.

   Asian   Pacific    Region    Satellite    Systems.    Orion   believes   that
currently-operating  satellite  systems in the Asia Pacific region generally are
limited in their ability to provide private  network and similar  services at an
acceptable performance level due to insufficient power, limited Ku-band capacity
and  limited  geographic  coverage.  Nevertheless,  there is a large  number  of
satellite systems  operating in Asia. The major Asia Pacific regional  satellite
systems include the AsiaSat system licensed in Hong Kong (with two satellites in
operation  and a third  planned for launch in 1997),  the Chinese  Apstar system
(also with two  satellites  in operation and a third planned for launch near the
end of 1997) and the  Indonesian  Palapa system (with three  satellites in orbit
and plans to launch at least  three more  satellites  through  1999).  Japan has
licensed  several  satellite  networks for domestic and  international  service,
including the JCSat series (three  satellites in operation and a fourth  planned
for  launch in 1997),  NTT's two  N-Star  satellites,  and Space  Communications
Corporation's  Superbird A and B (with a third planned for 1997). Optus operates
four Australian  domestic satellites that offer limited  international  coverage
and  plans  several  follow-on  satellites.  Korea  operates  Koreasat  1 and 2,
primarily  for domestic  service,  with plans for a third  satellite  that would
offer  expanded  regional  service in 1999.  Thailand  has  licensed the Thaicom
system, with two domestic satellites in operation,  and plans two new satellites
in  1997  offering  regional  coverage.   Measat  operates  a  Malaysian  system
consisting  of two  satellites  providing  DTH service to Malaysia  and parts of
Asia.

   Other Satellite  Systems.  There are numerous  satellites other than the ones
discussed above that compete to some extent with Orion. In addition, the Company
is aware of a substantial  number of satellites  that are in  construction or in
the  planning  stages.  Most of these  satellites  will cover  areas  within the
footprint of Orion 1 and/or the proposed  footprints  of Orion 2 and Orion 3. As
these  new  satellites  commence   operations,   they  (other  than  replacement
satellites   not   significantly   larger  than  the  ones  they  replace)  will
substantially increase the capacity available for sale in the company's markets.
After a

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satellite  has been  successfully  delivered  in  orbit,  the  variable  cost of
transmitting additional data via the satellite is limited. Accordingly, absent a
corresponding increase in demand, this new capacity can be expected to result in
significant  additional price  reductions.  For example,  Teledesic  Corporation
proposes  to  operate  up to 840 low earth  orbit  small  satellites  by 2001 to
provide global fixed satellite  services  (including  voice,  data and broadband
transmission  services).  Although  Orion cannot assess to what degree,  if any,
these  proposed  satellites  might  compete with Orion in the future,  Teledesic
could provide significant competition to the Company. See "Risk Factors -- Risks
Relating to Orion's Business -- Potential Adverse Effects of Competition." 

TERRESTRIAL CAPACITY

   Orion   competes   with   terrestrial   facilities   for   intra-Europe   and
trans-Atlantic capacity.

   European    Facilities.    Orion's    services   compete   with   terrestrial
telecommunications delivery services, which are being improved gradually through
the  build-out  of fiber  optic  networks  and a move  from  analog  to  digital
switching.   As  fiber  networks  and  digital  network  switching  become  more
prevalent,  the  resulting  improved  and less  expensive  terrestrial  capacity
increasingly competitive with Orion's services.

   Undersea   Cable.   Undersea   fiber  optic  cable   capacity  has  increased
substantially  in recent years.  Although  Orion  believes  that undersea  cable
capacity is not as well suited as satellite  capacity to serve the  requirements
of video  broadcasters or the demand for multi-point  private network  services,
fiber optic and coaxial  cables are well suited for  carrying  large  amounts of
bulk traffic,  such as long distance  telephone  calls,  between two  locations.
Operators of undersea  fiber optic cable systems  typically  are joint  ventures
among major telecommunications  companies. Orion expects strong competition from
these carriers in providing private network services.

REGULATION

REGULATORY OVERVIEW

   The international  telecommunications  environment is highly regulated. As an
operator of privately  owned  international  satellite  systems  licensed by the
United States, Orion is subject to the regulatory authority of the United States
(primarily the FCC) and the national communications authorities of the countries
in which it provides  service.  Each of these  entities can  potentially  impose
operational restrictions on Orion. In addition, Orion is subject to the INTELSAT
and EUTELSAT  consultation  processes.  The changing policies and regulations of
the United States and other countries will continue to affect the  international
telecommunications  industry. Orion cannot predict the impact that these changes
will have on its  business or whether the general  deregulatory  trend in recent
years  will  continue.  Orion  believes  that  continued  deregulation  would be
beneficial to Orion, but deregulation  also could reduce the limitations  facing
many of its existing competitors and potential new competitors.

   The  operation  of Orion 2 and Orion 3 will  require  a number of  regulatory
approvals, including (i) the approvals of the FCC (in the case of Orion 2), (ii)
completion of successful  consultations  with INTELSAT and, in the case of Orion
2, with EUTELSAT;  (iii)  satellite  "landing"  rights in countries that are not
INTELSAT  signatories or that require additional  approvals to provide satellite
or VSAT services;  and (iv) other regulatory approvals.  Obtaining the necessary
licenses and approvals  involves  significant  time and expense,  and receipt of
such licenses and approvals cannot be assured.  Failure to obtain such approvals
would have a material  adverse effect on Orion and on its ability to service its
indebtedness  and the value of the Orion Newco Common Stock. In addition,  Orion
is required to obtain approvals from numerous  national local authorities in the
ordinary  course of its business in connection  with most  arrangements  for the
provision of services. Within Orion 1's footprint, such approvals generally have
not been difficult for Orion to obtain in a timely manner.  However, the failure
to obtain  particular  approvals has delayed,  and in the future may delay,  the
provision of services by Orion.  See "Risk Factors -- Risks  Relating to Orion's
Business -- Approvals Needed; Regulation of Industry." 

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AUTHORITY TO CONSTRUCT, LAUNCH AND OPERATE SATELLITES

   Orion 1. In June 1991, Orion received final  authorization  from the FCC (the
"Orion 1  License")  to  construct,  launch and operate a Ku-band  satellite  in
geostationary  orbit at 37.5'  West  longitude  in  accordance  with the  terms,
conditions and technical specifications submitted in its application to the FCC.
The Orion 1 license from the FCC expires in January 2005.  Although Orion has no
reason  to  believe  that its  licenses  will not be  renewed  (or new  licenses
obtained) at the  expiration of the license  term,  there can be no assurance of
renewal.

   Orion 2. Orion has obtained  conditional  authorization  from the FCC for the
orbital  slot at 12' West  longitude  for  operation  of  Orion  2. The  Orion 2
authorization  will not become final until Orion  completes a consultation  with
INTELSAT and demonstration to the FCC of its financial ability to meet the costs
of construction, the launch of its satellite and operating expenses for one year
following launch.  Orion has not yet met the required  financial  qualifications
demonstration  to the FCC. It is required  to make such  showing  within 90 days
after completion of INTELSAT  consultation,  and accordingly intends to commence
consultation  with INTELSAT  after it has obtained an  additional  financing and
believes it can make the required financial showing.  The application filed with
the FCC for Orion 2 contains a technical  proposal different than that currently
being coordinated with the ITU, and will need to be amended. Orion has no reason
to believe  that the FCC will not approve such  amendment or that the  amendment
will cause material delay in obtaining final FCC authority for Orion 2.

   Orion 3. Orion is pursuing an orbital slot at 139' East longitude through the
Republic of the Marshall  Islands.  Under an agreement  with the Republic of the
Marshall  Islands  entered into in 1990,  the  Republic of the Marshall  Islands
agreed to file with the ITU all documents necessary to secure  authorization for
Orion to operate a satellite in geo-stationary orbit. In return for the right to
utilize any orbital slots secured by the Republic of the Marshall Islands, Orion
must, among other things, (i) commence  construction of a functioning  operating
center for  satellites  serving  the  Pacific  Island  portion of the Orion Asia
Pacific  network at least a year prior to the  operation of an Orion  satellite,
(ii) train and  support  certain  employees  designated  by the  Republic of the
Marshall Islands at least a year prior to the operation of an Orion Asia Pacific
satellite,  and (iii)  construct,  equip and install (except for power supply or
back-up) four earth  stations  capable of handling a "T-1" circuit for operation
with the Orion  Asia  Pacific  system  prior to the  operation  of an Orion Asia
Pacific satellite.

CONSULTATION WITH INTELSAT AND EUTELSAT

   Orion 1. Prior to receiving final licensing and launch authority for Orion 1,
Orion  successfully  completed its  consultation  with INTELSAT  pursuant to the
INTELSAT Treaty. A similar  consultation for Orion 1 was completed with EUTELSAT
in May  1994.  Additional  consultations  or other  approvals  may be  needed in
individual countries for the use of VSATs.

   Orion 2. Orion has not commenced  consultations with INTELSAT or EUTELSAT for
Orion 2, and intends to commence  such  consultation  with  INTELSAT for Orion 2
when it is ready to make its financial  showing to the FCC, as discussed  above.
Orion believes that since there are no INTELSAT or EUTELSAT  satellites  located
adjacent to the 12' West  longitude  orbital  slot,  the  INTELSAT  and EUTELSAT
coordination should be obtained in due course.

   Orion 3. Orion has not commenced consultations with INTELSAT for Orion 3, but
Orion believes that since there are no INTELSAT  satellites  located adjacent to
the 139' East  longitude  orbital  slot,  the  INTELSAT  coordination  should be
obtained in due course.

INTERNATIONAL TELECOMMUNICATION UNION

   An  international  treaty to which the U.S.  and the Republic of the Marshall
Islands are parties requires coordination of satellite orbital slots through the
procedures  of the ITU. The process for  coordinating  orbital slots through the
ITU is  discussed  under the  caption  " --  Orbital  Slots -- ITU  Coordination
Process."

   Orion 1: After Orion 1 reached its orbital position and commenced  operation,
the FCC notified the ITU.  This  concluded the process for  coordination  of the
Orion 1 orbital slot.

                                       102

<PAGE>
   Orion  2: On  behalf  of  Orion,  the  FCC has  commenced  the  orbital  slot
coordination  process  through the ITU.  Orion  believes that its use of the 12'
West longitude slot for Orion 2 is not likely to interfere with proposed uses of
adjacent slots filed for by other governments,  except for a possible overlap of
75 MHz with one proposal as  discussed  more fully under the caption "-- Orbital
Slots -- ITU Coordination Process."

   Orion 3: Orion,  through the Republic of the Marshall Islands,  has filed the
appropriate documentation with the ITU to begin the ITU coordination process for
Orion 3 at 139' East  longitude.  As discussed  more fully under the caption "--
Orbital Slots -- ITU Coordination Process," based upon the time of filing by the
Republic of the Marshall Islands,  Orion believes that the proposed orbital slot
for Orion 3 would have priority  under ITU  procedures  with respect to the 139'
East longitude  orbital slot, but some  proposals by other  administrations  for
adjacent slots would be entitled to effective  priority over the proposal by the
Republic of the Marshall  Islands with respect to possible  interference.  Orion
believes,  based upon its  monitoring of the proposals of other  administrations
and  information  in the industry  regarding  their  progress,  that none of the
administrations with effective priority over the proposal by the Republic of the
Marshall  Islands will be able to launch a satellite  prior to launch of Orion 3
to take advantage of such priority. Orion also believes that it can complete the
ITU coordination process for Orion 3 at 139' East longitude,  however, there can
be no assurance that this will be achieved.

UNITED STATES REGULATORY RESTRICTIONS

   Orion is subject to regulation under the  Communications  Act, the FCC's July
1985 Separate  Systems  decision as modified by subsequent FCC decisions,  other
FCC  regulations,  and the terms of the  various  orders  issued by the FCC with
respect  to Orion  and its  subsidiaries,  including  the  terms of the  Orion 1
License.   These   regulations,   orders  and   authorizations   impose  various
restrictions  on  Orion  and on  other  similarly  situated  companies.  Certain
important restrictions are described below.

   Limited Interconnection with Public Switched Message Networks.  Under current
U.S. policies concerning "separate satellite systems," such systems may provide:
(i) all services not  interconnected  with the public switched  network ("PSN");
(ii) emergency  restoration services and up to 8,000 64 kbps equivalent circuits
per satellite  interconnected  with the PSN for common carrier  public  switched
international  services; and (iii) interconnected  private line services.  Under
applicable FCC orders,  Orion has been authorized to provide up to 8,000 64 kbps
equivalent circuits  interconnected to the PSN for public switched services. All
U.S.  restrictions  on the  interconnection  of public  switched  networks  with
separate  satellite  systems are expected to  terminate in the first  quarter of
1997. Orion's networking  business is intended to be non-common carrier service,
and  accordingly  it will not be  permitted to provide  interconnected  switched
services, but will be permitted to sell this capacity to common carriers. 

   Use of the Orion 1 Satellite System for U.S.  Domestic  Services.  In January
1996, the FCC eliminated  certain  distinctions  between U.S.  licensed domestic
satellites  and separate  satellite  systems.  It  authorized  both sets of U.S.
licensed  satellite   operators  to  provide  both  domestic  and  international
services.  Domestic  operators have designed their current satellite  facilities
principally for continental U.S. coverage of the United States,  and thus may as
a general matter offer only limited  competition for  international  services at
the outset.  However,  future satellite designs of domestic satellite  operators
could be modified to more directly compete in the international market.

   New Orbital Locations. The FCC now requires applicants, at the time of filing
for an orbital position (either domestic arc or international orbital position),
to  demonstrate  the  financial  ability to  construct,  launch and operate that
satellite for a one year period. This new requirement will have no change in the
licensing  of  Orion's  orbital  positions  at 37.5'  West,  12' West,  47' West
longitude and 126' East  longitude  (the orbital slot at 139' East  longitude is
not being pursued  through the FCC and is not subject to the  financial  showing
requirement.)  To the extent that Orion is seeking an orbital  location  through
the FCC,  Orion will need to have  significant  financing on hand at the time of
application or obtain a waiver of the required financial demonstration. There is
no assurance that Orion will be able to obtain such waiver.

                                       103

<PAGE>
   Unauthorized  Transfer of Control.  The  Communications  Act bars a change in
control of the holder of FCC licenses  without prior  approval from the FCC. Any
finding that a change of control  without prior FCC approval had occurred  could
have a significant  adverse effect on Orion's  ability to implement its business
plan.

INTERNATIONAL REGULATION

   Orion will need to comply with the applicable laws and obtain the approval of
the regulatory authority of each country in which it proposes to provide network
services  or operate  VSATs.  The laws and  regulatory  requirements  regulating
access to satellite  systems vary from country to country.  Some  countries have
substantially  deregulated satellite  communications,  making customer access to
Orion  services  a simple  procedure,  while  other  countries  maintain  strict
monopoly regimes.  The application  procedure can be time-consuming  and costly,
and the terms of licenses vary for different countries.

   Orion provides  service using the licenses it obtains or that are obtained by
local  ground  operators  or,  in  certain  cases,   through   customer-obtained
authorizations.  For  example,  Orion's  representatives  in the United  Kingdom
(Kingston  Communications),  France (Matra Hachette),  Germany (Nortel Dasa) and
Italy (Telecom Italia) have licenses in such countries.  Orion also has obtained
"landing rights" through the INTELSAT treaty  (although each INTELSAT  signatory
country  retains  sovereignty  over the  transmission  of satellite  signals and
retains the right to object to the use of satellites within its borders).  Orion
is now authorized,  either directly or through its ground operators,  to provide
service in 27 European countries.

   Orion  expects to pursue a similar  strategy  in Asia and Latin  America.  In
addition,  Orion will need to comply with the  national  laws of each country in
which it  provides  services.  Laws  with  respect  to  satellite  services  are
currently  unclear in  certain  jurisdictions,  particularly  within the Orion 3
footprint.  In certain of these  jurisdictions,  satellite  services may only be
provided via domestic  satellites.  The Company  believes  that certain of these
restrictions  may change and it can structure its  operations to comply with the
remaining  restrictions.  However, there can be no assurance in this regard. See
"Risk  Factors  -- Risks  Relating  to Orion's  Business  --  Approvals  Needed;
Regulation of Industry." 

HUMAN RESOURCES

   As of  October  31,  1996,  Orion  and its  subsidiaries  had 175  full  time
employees.  Of its  total  work  force,  six are part of  management,  44 are in
engineering  or satellite  control  operations,  75 are in marketing,  sales and
sales support, and 50 are devoted to support and administrative activities.

LEGAL PROCEEDINGS

   In October 1995, Skydata Corporation ("Skydata"), a former contractor,  filed
suit against Orion  Atlantic,  Orion  Satellite  Corporation  and Orion,  in the
United States District Court for the Middle  District of Florida,  claiming that
certain Orion Atlantic  operations using frame relay switches infringe a Skydata
patent.  Skydata's  suit sought  damages in excess of $10 million and asked that
any damages assessed be trebled. On December 11, 1995, the Orion parties filed a
motion to  dismiss  the  lawsuit  on the  grounds  of lack of  jurisdiction  and
violation of a mandatory  arbitration  agreement.  In addition,  on December 19,
1995, the Orion parties filed a Demand for Arbitration  against Skydata with the
American  Arbitration  Association in Atlanta,  Georgia,  requesting  damages in
excess of $100,000 for breach of contract and declarations,  among other things,
that Orion and Orion Atlantic own a royalty-free license to the patent, that the
patent is invalid and  unenforceable  and that Orion and Orion Atlantic have not
infringed  on the patent.  On March 5, 1996,  the court  granted  the  Company's
motion to dismiss the lawsuit on the basis that Skydata's  claims are subject to
arbitration.  Skydata  appealed  the  dismissal  to the United  States  Court of
Appeals  to the  Federal  Circuit.  Skydata  also  filed a  counterclaim  in the
arbitration  proceedings asserting a claim for $2 million damages as a result of
the conduct of Orion and its affiliates. On May 15, 1996, the arbitrator granted
the Orion  parties'  request  for an initial  hearing on claims  relating to the
Orion parties' rights to the patent,  including the co-ownership claim and other
contractual claims. 

                                       104

<PAGE>
   On November 9, 1996,  Orion and Skydata executed a letter with respect to the
settlement  in full  the  pending  litigation  and  arbitration.  As part of the
settlement, the parties are to release all claims by either side relating in any
way to the patent and/or the pending  litigation and  arbitration.  In addition,
Skydata  is to grant  Orion (and its  affiliates)  an  unrestricted,  world-wide
paid-up  license to make,  have made,  use or sell products or methods under the
patent and all other corresponding continuation and reissue patents. Orion is to
pay Skydata  $437,000 over a period of two years as part of the settlement.  The
parties  are in the  process of  documenting  the terms of the  settlement  in a
formal settlement agreement.

   While Orion is party to  regulatory  proceedings  incident  to its  business,
there  are no  material  legal  proceedings  pending  or,  to the  knowledge  of
management, threatened against Orion or its subsidiaries.

                                       105

<PAGE>


                     MANAGEMENT OF ORION AND ORION NEWCO

DIRECTORS AND EXECUTIVE OFFICERS


   Orion's  Board is, and  following  the Merger  Orion  Newco's  Board will be,
divided into three classes of directors, serving staggered three-year terms. The
directors  and  executive  officers  of Orion and their ages and (in the case of
directors) terms as of November 15, 1996 are as follows:


<TABLE>
<CAPTION>
                                                                                TERM EXPIRES
        NAME           AGE                 POSITION WITH ORION                  (DIRECTORS)
- --------------------  ----- ------------------------------------------------- ---------------
<S>                   <C>   <C>                                               <C>
Gustave M. Hauser ..  67    Chairman, Director                                1998
                            President and Chief Executive Officer, Director
W. Neil Bauer.......  50    (Principal Executive Officer)                     1999
                            Vice President, Chief Financial Officer and
                            Treasurer (Principal Financial Officer and
David J. Frear......  40    Principal Accounting Officer)
                            Vice President, Corporate and Legal Affairs, and
Richard H. Shay.....  55    Secretary
                            Senior Vice President, Orion Satellite
                            Corporation and General Manager, Engineering and
Denis Curtin........  57    Satellite Operations
                            Vice President of Orion and President, Orion
Hans C. Gin|fer.......57    Asia Pacific Corporation
                            Vice President of Orion and President, Orion
Douglas H. Newman ..  57    Satellite Corporation
Richard J. Brekka ..  35    Director                                          1997
Warren B. French,
Jr..................  73    Director                                          1997
Barry Horowitz......  52    Director                                          1998
Sidney S. Kahn......  59    Director                                          1999
John G. Puente......  66    Director                                          1998
W. Anthony Rice.....  44    Director                                          1997
John V. Saeman......  60    Director                                          1998
Robert M. Van
Degna...............  52    Director                                          1999

</TABLE>

BACKGROUND OF DIRECTORS AND EXECUTIVE OFFICERS


   Information  with respect to the business  experience and the affiliations of
the directors and executive officers of Orion (and,  following the Merger, Orion
Newco) is set forth below.

   Gustave M. Hauser has been  Chairman of Orion since January 1996 and has been
a director of Orion since  December  1982.  Since 1983, he has been Chairman and
Chief  Executive  Officer of Hauser  Communications,  Inc.,  an  investment  and
operating  firm   specializing   in  cable   television  and  other   electronic
communications.  From  1973 to 1983 he served as  Chairman  and Chief  Executive
Officer  of  Warner-Amex  Cable  Communications,  Inc.  (formerly  Warner  Cable
Communications,  Inc.), a major  multiple  system  operator of cable  television
systems and originator of satellite delivered video programming. He is a trustee
of the  Museum  of  Television  and  Radio.  He is a past Vice  Chairman  of the
National  Cable  Television  Association,  and from 1970 to 1977 he  served,  by
appointment of the President of the United States, as a director of the Overseas
Private Investment Corporation.

   W. Neil Bauer has been  President  of Orion since  March  1993,  and has been
Chief  Executive  Officer  and a director  since  September  1993.  From 1989 to
February 1993, Mr. Bauer was employed by GE American Communications, Inc., where
he served as Senior Vice President and General Manager of 

                                       106

<PAGE>
Commercial  Operations.  Prior to 1989, Mr. Bauer was Chief Financial Officer of
GE American  Communications,  Inc. and later head of commercial  sales.  He held
several  key  financial  planning  positions  at GE/RCA from 1984  through  1986
focused on operational and business analysis of diverse business units including
all  communications  units.  From  1974-1983,  he was  employed  by  RCA  Global
Communications,  an international  record carrier.  During this period,  he held
several  financial and  operational  positions and was responsible for financial
and business planning.

   David J. Frear has been Vice President and Chief  Financial  Officer of Orion
since  November 1993 and Treasurer of Orion since January 1994.  From  September
1990 through April 1993, Mr. Frear served as Vice President and Chief  Financial
Officer of Millicom Incorporated,  an international  telecommunications  service
company.  From January 1988 to September 1990, Mr. Frear held various  positions
in the  investment  banking  department  at Bear,  Stearns & Co. Inc.  Mr. Frear
received his CPA in 1979.

   Richard H. Shay has been  Secretary  of Orion since  January  1993 and a Vice
President since April 1992. From July 1981 until September 1985, Mr. Shay served
as  Chief   Counsel  to  the   National   Telecommunications   and   Information
Administration  ("NTIA") of the U.S.  Department  of Commerce and then as Deputy
General  Counsel  to the  Department,  where he was  responsible  for the  legal
matters of the Department's  agencies. In his capacity as Chief Counsel to NTIA,
Mr. Shay also served as Acting Director of its Office of  International  Policy,
served on the  official  U.S.  delegation  to the 1982  Nairobi  Plenipotentiary
Conference  of the ITU and was involved in  preparation  for the 1983 ITU Direct
Broadcast Satellite World Administrative Radio Conference.

   Denis J.  Curtin is Senior Vice  President,  OrionSat  and  General  Manager,
Engineering and Satellite Operations. He joined the Company in September 1988 as
Vice  President,  Engineering.  He previously  was Senior  Director of Satellite
Engineering of COMSAT's Systems Division. While at COMSAT, Dr. Curtin served for
over 21 years in the systems engineering,  program and engineering management of
both domestic and international  satellite  systems.  He has an MS in Physics, a
Ph.D. in Mechanical Engineering, and has published numerous papers on solar cell
and  solar  array  technology,   is  the  editor  of  the  Trends  in  Satellite
Communications  and is a Fellow of the American  Institute of  Astronautics  and
Aeronautics.

   Hans C. Giner became  President  of Orion Asia  Pacific,  Orion's  subsidiary
devoted to pursuing  construction  and launch of a satellite  covering  the Asia
Pacific  region,  in the fourth quarter of 1995 and a Vice President of Orion in
the first  quarter of 1996.  Mr.  Gin|fer  served as a consultant  to Orion from
October 1995 through January 1996 relating to similar matters. Prior thereto, he
held senior  positions in the satellite and  telecommunications  industries  for
more than 20 years.  Most  recently,  from April 1994 through  September 1995 he
served as President of Stellar One Corporation,  a high-tech company  designing,
manufacturing  and  distributing  technologies  for  telecommunications  groups,
particularly local telephone and cable television companies. Prior to that, from
November 1987 through March 1994,  Mr.  Gin|fer held several  positions for, and
ultimately served as president and CEO of Millisat  Holdings,  Inc., a member of
the Millicom Group, with worldwide  responsibility  for development of media and
telecommunications   properties,   including   broadcast,   cable  and  wireless
television.

   Douglas H. Newman has been  President of Orion  Satellite  Corporation  since
October 16, 1995. Mr. Newman was with Sprint International as Vice President and
General  Manager  Asia-Pacific  Division  from July 1993 until  October 1994. He
served as Vice President  World Wide Sales and Marketing for Analog Devices Inc.
from  December  1988 to July  1993.  Prior  to that he was a Vice  President  of
National Semiconductor Corporation both in Europe and the United States from May
1979 until December 1988. Earlier, he spent 15 years at Texas Instruments Inc.'s
European  Semiconductor  Division  in  a  variety  of  management  positions  in
engineering, marketing and sales.

   Richard  J.  Brekka  has been a director  of Orion  since June 1994.  He is a
Managing Director of CIBC Wood Gundy Capital  ("CIBC-WG"),  the merchant banking
division  of  Canadian  Imperial  Bank of  Commerce  and is a  Director  and the
President of CIBC Wood Gundy Ventures, Inc., an indirect wholly owned subsidiary
of Canadian  Imperial Bank of Commerce.  Mr.  Brekka joined  CIBC-WG in February
1992.  Prior to joining  CIBC-WG,  Mr. Brekka was an officer of Chase  Manhattan
Bank's merchant banking group from February 1988 until February 1992. 

                                       107

<PAGE>

   Warren B. French,  Jr. has been a director of Orion since August 1988. He was
President and a director of Shenandoah  Telephone Company of Edinburg,  Virginia
from 1973 to 1988 and President and a director of Shenandoah  Telecommunications
Company, the parent company of Shenandoah Telephone Company,  from 1981 to 1988.
From  1988  through   1995,  he  was  Chairman  and  a  director  of  Shenandoah
Telecommunications Company. He is a past Chairman of the United States Telephone
Association and is a former director of First National Corporation. 

   Barry  Horowitz has been a director of Orion since May 1996.  He is President
and Chief  Executive  Officer of  Mitretek  Systems,  Inc.  Mitretek  works with
federal, state and local governments as well as other non-profit public interest
organizations on technology-based  research and development  programs.  Mitretek
was incorporated in December 1995 as a result of a restructuring  with The MITRE
Corporation. Principal capabilities are related to information and environmental
system technologies.  In addition, Dr. Horowitz is President and Chief Executive
Officer of  Concept 5  Technologies,  Inc.,  a  subsidiary  of  Mitretek,  which
provides technical services to commercial clients, with its initial focus on the
financial  community.  Prior to the  restructuring  and since 1969, Dr. Horowitz
served MITRE in several capacities, including Trustee and President and CEO.

   Sidney S. Kahn has been a director of Orion since July 1987.  He is presently
a private investor.  From 1977 to December 1989, he was Senior Vice President of
E.F. Hutton Company,  Inc., a wholly owned  subsidiary of the E.F. Hutton Group,
Inc. He is also a director of Delia's, Inc.

   John G. Puente has been a director  since 1984.  Mr.  Puente was  Chairman of
Orion  from April 1987  through  January  1996,  and since  July,  1996 has been
serving as a consultant to the Company and chairman of the  Company's  Executive
Committee. He served as Chief Executive Officer of Orion from April 1987 through
September 1993. He was a director and, from 1978 to April 1987, served as Senior
Vice  President,  Executive Vice President or Vice Chairman of M/A-COM,  Inc., a
diversified  telecommunications  and manufacturing  company. He was a founder of
SouthernNet, Inc., a fiber optic long distance communications company and one of
the two  companies  that  merged  to form  Telecom*USA,  Inc.  (which  was later
acquired  by MCI),  serving as a director  of  SouthernNet  from July 1984 until
August  1987,  and  Chairman  of the Board of  SouthernNet  from July 1984 until
December 1986.  During his tenure as Chairman of the Board of  SouthernNet,  Mr.
Puente was  instrumental  in the  founding  of the  National  Telecommunications
Network,  a national  consortium  of long  distance  fiber optic  communications
companies,  and was its first chairman. In 1972 Mr. Puente was a founder of DCC,
Inc.,  of which he became  Chairman  and CEO. In 1978 DCC,  Inc. was acquired by
Microwave Associates to form M/A-COM, Inc.; DCC, Inc., subsequently was acquired
by Hughes Aircraft  Company and became Hughes Network  Systems,  Inc. Mr. Puente
also  played a prominent  role in the early  development  of the  communications
satellite  industry,  holding  technical and  executive  positions in COMSAT and
American Satellite Corporation.

   W. Anthony Rice has been a director of Orion since January 1994.  Mr. Rice is
Chief Executive Officer of British Aerospace Asset Management, the business unit
responsible  for  all of the  company's  activities  in  respect  of  commercial
aircraft  leasing and  financing.  Previously,  he served as Group  Treasurer of
British  Aerospace  Plc from 1991 until the end of 1995.  British  Aerospace  is
Europe's leading defense and aerospace company.

   John V.  Saeman has been a director of Orion since  December  1982.  He is an
owner of Medallion Enterprises LLC, a private investment firm located in Denver,
Colorado.  Mr. Saeman was Vice Chairman and Chief Executive Officer of Daniels &
Associates,  Inc. and its related entities in the telecommunications  field from
1980 to 1988. He is former  director as well as past Chairman of Cable Satellite
Public Affairs  Network  (C-Span) as well as a former director and past Chairman
of the  National  Cable  Television  Association.  Mr.  Saeman was a director of
Celerex Corporation and is a director of Nordstrom National Credit Bank. Celerex
Corporation filed a petition for  reorganization  under Chapter 11 of the United
States Bankruptcy Code in 1995.



                                       108

<PAGE>
   Robert M. Van Degna has been a director of Orion  since June 1994.  He is the
managing  general partner of Fleet Equity  Partners.  Mr. Van Degna joined Fleet
Financial  Group  in 1971 and has  held a  variety  of  lending  and  management
positions  until he  organized  Fleet  Equity  Partners  in 1982 and  became its
managing  general  partner.  Mr.  Van Degna  also  serves as a  director  of ACC
Corporation and, Preferred Networks, Inc.

   Orion's  Certificate  of  Incorporation  and Bylaws provide that the Board of
Directors of Orion,  which presently  consists of 11 members (with one vacancy),
shall consist of that number of directors  determined by resolution of the Board
of Directors.  The Charter provides that the Board of Directors shall be divided
into three  classes,  each  consisting of  approximately  one-third of the total
number of directors. Class I Directors, consisting of Messrs. Hauser, Puente and
Saeman, will hold office until the 1998 annual meeting of stockholders; Class II
Directors,  consisting of Messrs. Bauer, Horowitz,  Kahn and Van Degna will hold
office until the 1999 annual  meeting of  stockholders;  and Class III Directors
consisting  of Messrs.  Brekka,  Rice and French will hold office until the 1997
annual meeting of stockholders.  There are no family  relationships among any of
the directors or officers of Orion.  Executive  officers serve at the discretion
of the Board of Directors.

   Three directors, Messrs. Rice, Brekka and Van Degna, were elected pursuant to
agreements with each of British Aerospace, CIBC and Fleet,  respectively,  which
terminated  in August 1995 when the Orion Common Stock became  publicly  traded.

COMMITTEES OF THE BOARD OF DIRECTORS

   The Board of Directors  has  established  a Committee on Auditing,  Corporate
Responsibility  and  Ethics  (the  "Audit  Committee"),  a  Committee  on  Human
Resources  and  Compensation  (the  "Compensation   Committee"),   an  Executive
Committee, a Finance Committee and a Nominating Committee.

   The Audit Committee is composed of Messrs.  Van Degna (chairman),  Hauser and
Kahn.  The Audit  Committee  examines  and  considers  matters  relating  to the
financial  affairs  of  Orion,  including  reviewing  Orion's  annual  financial
statements,  the  scope of the  independent  annual  audit  and the  independent
auditors' letter to management  concerning the effectiveness of Orion's internal
financial and  accounting  controls.  From the time Orion became  subject to the
Exchange Act through December 31, 1995 (the "1995 Public Company  Period"),  the
Audit Committee held one meeting.

   The Compensation Committee is composed of Messrs. Brekka (chairman),  French,
Saeman  and  Van  Degna.   The  Compensation   Committee   considers  and  makes
recommendations to Orion's Board of Directors with respect to programs for human
resource  development  and  management  organization  and  succession,  approves
changes in senior executive compensation, considers and makes recommendations to
Orion's Board of Directors with respect to compensation matters and policies and
employee  benefit and incentive plans and exercises  authority  granted to it to
administer such plans and  administers  Orion's stock option and grants of stock
options under the stock option plans. During the 1995 Public Company Period, the
Compensation  Committee  held two meetings.  Three of the four members  attended
both meetings; Mr. Brekka attended one of the two meetings.

   The  Executive  Committee  is  composed  of  Messrs.   Hauser,  Kahn,  Puente
(chairman),  Saeman and Van Degna. The Executive  Committee  provides  strategic
direction with respect to financing, strategic partners, acquisitions and market
focus, subject to approval by the Board of Directors of all significant actions.
The Executive  Committee was formed in July 1996 and has met numerous times with
regard to the  Transactions  and other  matters.  Mr.  Puente has been  actively
engaged  as  chairman  of  the  Executive   Committee  in  connection  with  the
Transactions.

   The Finance Committee is composed of Messrs. Brekka, Hauser, Kahn (chairman),
Puente,   Rice  and  Saeman.   The  Finance   Committee   considers   and  makes
recommendations  to the Board of Directors with respect to the financial affairs
of Orion,  including  matters  relating to capital  structure and  requirements,
financial  performance,   dividend  policy,  capital  and  expense  budgets  and
significant  capital  commitments.  During the 1995 Public Company  Period,  the
Finance Committee held ten meetings. Four of the members attended at least eight
of these meetings; Messrs. Rice and Brekka attended fewer than that number.


                                       109

<PAGE>
   The  Nominating  Committee is composed of Messrs.  French,  Puente and Saeman
(chairman).  The  Nominating  Committee  recommends  to the  Board of  Directors
qualified   candidates   for  election  as  directors  of  Orion  and  considers
candidates, if any, recommended by stockholders.  During the 1995 Public Company
Period, the Nominating Committee held one meeting. Each member of the Nominating
Committee attended this meeting.

LIMITS ON LIABILITY; INDEMNIFICATION

   The  provisions of Orion Newco's  Certificate  of  Incorporation  relating to
limits on liability and indemnification of directors are substantially identical
to the provisions of Orion's Certificate of Incorporation summarized below.

   Orion's Certificate of Incorporation provides that Orion's directors will not
be liable for monetary  damages for breach of the  directors'  fiduciary duty of
care to  Orion  and its  stockholders.  This  provision  in the  Certificate  of
Incorporation   does  not  eliminate  the  duty  of  care,  and  in  appropriate
circumstances  equitable  remedies  such as an  injunction  or  other  forms  of
non-monetary  relief would remain  available  under  Delaware law. In accordance
with the  requirements  of Delaware law,  Orion's  directors  remain  subject to
liability  for  monetary  damages (i) for any breach of their duty of loyalty to
Orion  or its  stockholders,  (ii) for acts or  omissions  not in good  faith or
involving  intentional  misconduct  or knowing  violation  of law,  (iii)  under
Section 174 of the Delaware General  Corporation Law for approval of an unlawful
dividend  or  an  unlawful  stock  purchase  or  redemption  and  (iv)  for  any
transaction from which the director derived an improper personal  benefit.  This
provision  also does not affect a  director's  responsibilities  under any other
laws,  such as the  federal  securities  laws or state or federal  environmental
laws. 

   Orion's  Certificate of Incorporation also provides that, except as expressly
prohibited  by law,  Orion shall  indemnify any person who was or is a party (or
threatened to be made a party) to any threatened,  pending or completed  action,
suit or  proceeding  by reason of the fact that such person is or was a director
or officer of Orion (or is or was  serving at the request of Orion as a director
or officer of another enterprise), against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement actually and reasonably incurred
by such person in connection with such action, suit or proceeding if such person
acted in good faith and a manner such person reasonably believed to be in or not
opposed to the best interests of Orion, and, with respect to any criminal action
or  proceeding,  had no  reasonable  cause to  believe  his or her  conduct  was
unlawful.  Such indemnification shall not be made in respect of any claim, issue
or matter as to which such person shall have been adjudged to be liable to Orion
unless (and only to the extent that) the Delaware Court of Chancery or the court
in which such action or suit was  brought  determines  that,  in view of all the
circumstances  of the case,  such  person is fairly and  reasonably  entitled to
indemnity.

                                       110

<PAGE>
EXECUTIVE COMPENSATION

SUMMARY COMPENSATION TABLE

   The  following  table sets forth a summary of total  compensation,  including
bonuses, paid to the Chief Executive Officer and the four other most highly paid
executive  officers  (the  "named  executive  officers")  for  services  in  all
capacities to Orion and its subsidiaries for the fiscal years ended December 31,
1996, 1995 and 1994.
<TABLE>
<CAPTION>
                                             ANNUAL COMPENSATION                        LONG TERM COMPENSATION
                                         ------------------------------------- ------------------------------------
                                                                                         AWARDS            PAYOUTS
                                                                               -------------------------   --------
                                                                   OTHER                      SECURITIES
                                                                   ANNUAL         RESTRICTED  UNDERLYING               ALL OTHER
           NAME AND                                                COMPEN-           STOCK     OPTIONS/    LTIP          COMPEN-    
      PRINCIPAL POSITION         YEAR     SALARY($)   BONUS($)   SATION($)(1)     AWARD(S)($)  SARs(#)   PAYOUTS($)     SATION($)
      ------------------         ----     ---------   --------   ------------     -----------  -------   ----------    ------------
<S>                             <C>        <C>        <C>         <C>                         <C>     
W. NEIL BAUER,................  1996       $278,106   $     --    $     --                            
 President and Chief            1995        265,000     90,000                                110,294 
 Executive Officer              1994        250,000    100,000     100,684                            
                                                                                                      
DAVID J. FREAR, ..............  1996        185,996         --          --                            
 Vice President, Treasurer      1995        179,005     40,000       4,570                     55,147 
 and Chief Financial Officer    1994        170,000     51,000      25,715                            
                                                                                                      
DOUGLAS H. NEWMAN ............  1996        201,206         --          --                            
 Vice President of Orion        1995         34,618     14,000                                 50,000 
 and President, Orion           1994             --             
 Satellite Corporation                                                                                
                                                                                                      
HANS C. GINER.................  1996        141,638                                            35,000 
 Vice President of Orion and    1995             --                                                   
 President, Orion Asia Pacific  1994             --                                                   
 Corporation                                                                                         
                                                                                                      
DENIS J. CURTIN,..............  1996        155,380                                             5,000 
 Senior Vice President of       1995        151,081     38,000                                 24,705 
 Orion Satellite Corporation    1994        133,850     35,700                                        
</TABLE>                 
- ----------
   (1) Relocation expenses.

OPTION GRANTS IN LAST FISCAL YEAR

   Orion has adopted a 1987 Employee Stock Option Plan (the "1987 Employee Stock
Option Plan"). Under the 1987 Employee Stock Option Plan, options to purchase up
to an  aggregate of 1,470,588  shares of Orion  Common Stock are  available  for
grants to employees of Orion.  Orion has also  adopted a  Non-Employee  Director
Stock Option Plan. The following table sets forth information  concerning grants
of stock options to the named executive  officers  pursuant to the 1987 Employee
Stock Option Plan during the year ended December 31, 1996. 
<TABLE>
<CAPTION>
                                                                                  Potential Realized
                                                                                   Value at Assumed
                                                                                     Annual Rates
                                                                                    of Stock Price
                                                                                      Appreciation
                                      Individual Grants                             for Option Term
                     --------------------------------------------------------   --------------------
                      Number of    % of Total
                     Securities     Options       Exercise or
                     Underlying    Granted to     Base Price
                      Options     Employees in     Per Share    Expiration  
Name                  Granted     Fiscal Year      ($/Sh)(1)       Date            5%($)    10%($)
- ----                 ----------   ------------    ------------  ------------     --------  --------
<S>                    <C>            <C>            <C>        <C>   <C>         <C>      <C>    
W.   Neil Bauer            --         --                                                     
David J. Frear .           --         --                                                     
Douglas H. Newman.         --         --                                                     
Hans C. Giner ...      25,000         20%            8.49       01/16/03 (2)      86,386   201,425
                       10,000          8%           10.78       11/19/03 (2)      43,875   102,302
Denis J. Curtin .       5,000          4%           10.78       11/19/03 (2)      21,937    51,151
</TABLE>      
- ----------
(1)  The  option  exercise  price is equal to one  hundred  percent  of the fair
     market value of the Orion Common Stock on the date the option was granted.

(2)  The options will vest in equal  installments  over a five-year  period from
     the date of grant.

                                       111

<PAGE>


OPTION EXERCISES IN LAST FISCAL YEAR AND YEAR-END OPTION VALUES

   The following table sets forth the value of all  unexercised  options held at
year-end  1996 by the  named  executive  officers.  No named  executive  officer
exercised any stock options during the fiscal year.

                        NUMBER OF SECURITIES
                       UNDERLYING UNEXERCISED        VALUE OF UNEXERCISED
                               OPTIONS             IN-THE-MONEY OPTIONS AT
                       AT DECEMBER 31, 1996        DECEMBER 31, 1996 (1)
                     -------------------------    -------------------------
     NAME            EXERCISABLE/UNEXERCISABLE    EXERCISABLE/UNEXERCISABLE
     ----            -------------------------    -------------------------
W. Neil Bauer .....        97,058/138,235              312,130/279,780 
David J. Frear ....        35,293/ 60,294               75,659/ 86,286 
Douglas H. Newman .        10,000/ 40,000               32,050/128,200 
Hans C. Giner .....             0/ 35,000                    0/130,575 
Denis J. Curtin ...        31,284/ 20,661              121,404/ 40,321 
                                               
- ----------
(1)  Based on a per share price of $12.875 on December 31, 1996.

COMPENSATION OF DIRECTORS

   Prior to January 1996 (Orion having become a publicly  traded  company during
1995),  directors  did not  receive  compensation  for  serving  on the Board of
Directors or its  committees  but were  reimbursed  for their  expenses for each
Board of Directors or its  committee  meeting  attended.  Commencing  in January
1996, directors receive annual compensation of $4,000,  $1,500 for each Board of
Directors  meeting  attended,  $750 for each committee  meeting attended and per
annum grants of stock  options to purchase  10,000  shares of Orion Common Stock
under the 1996  Non-Employee  Director  Stock Option Plan.  An initial  grant of
options to purchase 10,000 shares of Orion Common Stock under that plan was made
to each non-employee  director in January 1996. In addition, an initial grant of
options to purchase 30,000 shares of Orion Common Stock under that plan was made
to Barry  Horowitz,  a director,  upon his  election  in March 1996.  The option
exercise price of the options granted to each  non-employee  director in January
1996 and Mr.  Horowitz in March 1996 was equal to the fair market value of Orion
Common Stock on the respective dates the options were granted.

EMPLOYMENT AGREEMENTS AND TERMINATION OF EMPLOYMENT AND CHANGE IN CONTROL
ARRANGEMENTS


   Orion has not entered into any  employment  agreements or any  termination of
employment or change in control  arrangements  with any of its officers,  except
for certain change in control  vesting  provisions in the 1987 Stock Option Plan
described below.

   In his capacity as a consultant to the Company, John G. Puente, a director of
the Company and Chairman of the Executive Committee, is compensated at a rate of
$25,000 per month and has been granted  non-incentive  stock options to purchase
up to an aggregate of 100,000  shares of Orion Common Stock at an exercise price
of $9.83 per share. Of the options granted to Mr. Puente, 50% are vested and 50%
will vest upon the successful  completion during Mr. Puente's tenure as Chairman
of the  Executive  Committee  or  within  six  months  thereafter,  of the Notes
Offering.  All options granted to Mr. Puente will vest immediately upon the sale
or merger of the Company during Mr. Puente's tenure as Chairman of the Executive
Committee or within six months thereafter. 

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

   Mr. Bauer, the President and Chief Executive Officer of Orion and Mr. Puente,
then  Chairman of Orion,  served on the  Compensation  Committee  and  therefore
participated  in making  recommendations  to the Board of  Directors  on officer
compensation matters until June 28, 1995.

STOCK OPTION PLANS

   1987  Employee  Stock  Option  Plan.  In April 1987,  Orion  adopted its 1987
Employee  Stock  Option Plan.  Under the 1987  Employee  Stock  Option Plan,  as
amended in March  1995,  options to  purchase up to an  aggregate  of  1,470,588
shares of Orion  Common  Stock may be granted to key  employees of Orion

                                       112

<PAGE>

and its subsidiaries. The 1987 Employee Stock Option Plan provides for the grant
both of incentive stock options intended to qualify as such under Section 422 of
the Internal  Revenue Code of 1986,  as amended (the "Code"),  and  nonstatutory
stock  options.  The 1987 Employee Stock Option Plan will terminate in May 1997,
unless sooner terminated by the Board of Directors.

   The 1987 Employee  Stock Option Plan is  administered  by the Board,  but the
Board has  delegated  administration  to the  Compensation  Committee,  which is
comprised of  disinterested  directors.  Subject to the limitations set forth in
the  1987  Employee  Stock  Option  Plan,  the  Compensation  Committee  has the
authority to select the persons to whom grants are to be made,  to designate the
number of shares to be covered  by each  option and  whether  such  option is an
incentive  stock option or a  nonstatutory  stock option,  to establish  vesting
schedules,  to  specify  the  type of  consideration  to be paid to  Orion  upon
exercise  and,  subject to certain  restrictions,  to specify other terms of the
options.  The maximum  term of options  granted  under the 1987  Employee  Stock
Option Plan is ten years.  The  aggregate  fair  market  value of the stock with
respect to which incentive  stock options are first  exercisable in any calendar
year may not exceed  $100,000 per  individual.  Options  granted  under the 1987
Employee  Stock Option Plan  generally  are  non-transferable  and expire either
upon, or 30 days after, the termination of an optionee's employment relationship
with Orion.  In general,  if an optionee dies or is permanently  disabled during
his or her  employment  by or  service  to Orion,  such  person's  option may be
exercised up to one year following such death or disability.

   Options  granted under the 1987  Employee  Stock Option Plan to the executive
officers  will  immediately  vest in the  event  the  optionee's  employment  is
terminated  within two years after a "Change in Control" by Orion other than for
"Cause" or by the  optionee  for "Good  Reason" (as such terms are defined in an
applicable  resolution of the Board of  Directors).  "Cause" for  termination of
employment is narrowly  defined,  including  only such matters as fraud, a crime
involving moral  turpitude,  compromising  trade secrets,  willfully  failing to
perform  material  assigned  duties or gross or willful  misconduct  that causes
substantial  harm to Orion.  "Good Reason"  means a reduction in the  optionee's
base  salary,  except  for a  reduction  of up to  10%  due  to a  reduction  in
compensation generally applicable to execu tive officers of Orion, a substantial
reduction  in  responsibilities  or required  relocation.  A "Change in Control"
occurs  when any person or entity  becomes  the  beneficial  owner,  directly or
indirectly,  of securities representing 51% or more of the combined voting power
of  Orion's  then  outstanding   securities  (excluding  for  purposes  of  such
computation all securities of Orion  beneficially owned by such person or entity
as of March 15, 1995).

   The exercise  price of incentive  stock  options must equal at least the fair
market value of the Orion Common Stock on the date of grant.  The exercise price
of  nonstatutory  stock  options may be less than the fair  market  value of the
Orion Common Stock on the date of grant.  The exercise price of incentive  stock
options  granted to any  person  who at the time of grant owns stock  possessing
more than 10% of the total combined voting power of all classes of stock must be
at least  110% of the fair  market  value of such stock on the date of grant and
the term of these options cannot exceed five years.

   As of  September  30,  1996,  Orion had  options  outstanding  under the 1987
Employee Stock Option Plan to purchase an aggregate of 891,776 shares held by 86
persons at a weighted  average  exercise price of $9.77 per share.  The exercise
price of all options  granted under the 1987 Employee Stock Option Plan has been
at least equal to the fair market value of the Orion Common Stock on the date of
the grant as determined in good faith by the Board of Directors. As of September
30, 1996,  options to purchase  129,755  shares of Orion  Common  Stock  granted
pursuant  to the Plan had been  exercised.  There  are  449,057  shares of Orion
Common Stock available for future grants under the Employee Plan.

   The 1987 Employee  Stock Option Plan may be amended by the Board,  subject to
stockholder  approval if such approval is then required by applicable  law or in
order for the 1987  Employee  Stock  Option  Plan to  continue  to  satisfy  the
requirements of Rule 16b-3 under the Exchange Act.

   Non-Employee  Director Stock Option Plan. In January 1996,  Orion adopted its
Non-Employee  Director  Stock Option Plan  ("Non-Employee  Director Stock Option
Plan") and up to 380,000  shares of Orion Common Stock are reserved for issuance
thereunder.  The stock options  granted under the  Non-Employee  Director  Stock
Option Plan are non-incentive options.

                                       113

<PAGE>

   Under  the  terms  of the  Non-Employee  Director  Stock  Option  Plan,  each
Non-Employee  Director (as defined)  generally will receive or have vest options
to  purchase  10,000  shares  of Orion  Common  Stock  for each  year  that such
Non-Employee  Director serves as a director of Orion. Each current  Non-Employee
Director has a vested  option to purchase  10,000  shares of Orion Common Stock,
and an unvested  option to purchase  10,000  shares of Orion  Common Stock which
will vest at the next annual meeting of stockholders (expected to be held in May
1997) if such  director  remains in office  until such date.  In  addition,  Mr.
Horowitz,  who became a director on May 20, 1996,  has an  additional  option to
purchase  10,000  shares  which will vest if he remains in office until the 1998
annual stockholders meeting. Each current Non-Employee Director will be annually
granted an  additional  option to purchase  10,000  shares of Orion Common Stock
each year  after  the  annual  meeting  of  stockholders  if he or she is then a
Non-Employee Director.

   Each new Non-Employee  Director whose  commencement of service is after March
20, 1996 will be granted an initial  option to purchase  the number of shares of
Orion Common Stock equal to (i) the number of complete and partial  years in the
term to which such Non-Employee Director was elected or appointed, multiplied by
(ii)  10,000.  Each  Non-Employee  Director  also will be  annually  granted  an
additional  option to purchase 10,000 shares of Orion Common Stock as of each of
(i) the day after the Non-Employee  Director's first re-election to the Board of
Directors and (ii) each year after the annual meeting of  stockholders  if he or
she is then a Non-Employee Director.

   Each option will be  exercisable  from and after the day of the first  annual
meeting of  stockholders  after grant of the  option.  In the case of an initial
option to purchase of more than 10,000 shares, the option will be exercisable to
the extent of 10,000  shares from and after the day of the first annual  meeting
of stockholders  after grant of the option,  in respect of an additional  10,000
shares from and after the day of the second annual meeting of stockholders after
grant of the  option,  and (if the  option is to  purchase  of more than  20,000
shares), in respect of an additional 10,000 shares from and after the day of the
third  annual  meeting  of  stockholders  after  grant of the  option.  Upon the
termination  of service  of a  Non-Employee  Director  in all  capacities  as an
employee and/or director of Orion and all of its affiliated companies other than
by reason of the death or permanent and total disability,  any option granted to
such Non-Employee  Director  pursuant to the Non-Employee  Director Stock Option
Plan  shall  terminate  to  the  extent  it is  not  then  exercisable.  If  the
termination  of  service  is by  reason  of the  death or  permanent  and  total
disability of a  Non-Employee  Director,  the options held by such  Non-Employee
Director  shall be  exercisable in respect of all shares subject to such options
for a period of one year from the date of such  termination  of service or until
expiration of the option, if earlier.

   The option exercise price under the  Non-Employee  Director Stock Option Plan
is equal to 100% of the fair market  value of Orion Common Stock on the date the
option is granted.  Options granted under the Non-Employee Director Stock Option
Plan expire if not exercised within five years from the date of grant. 

   Payment for shares  purchased  under the  Non-Employee  Director Stock Option
Plan may be made either in cash or cash  equivalents,  in shares of Orion Common
Stock with a fair market value equal to the option price,  or a  combination  of
cash and shares of Orion Common Stock.  The  Non-Employee  Director Stock Option
Plan also allows for "cashless  exercise," in which a licensed broker tenders to
Orion cash equal to the exercise  price (plus taxes  required to be withheld) at
the time Orion issues the stock certificates.

   The Non-Employee  Director Stock Option Plan will terminate  automatically on
March 20, 2006,  unless  previously  terminated.  No termination,  suspension or
amendment  of the  Non-Employee  Director  Stock  Option  Plan may,  without the
consent of the optionee to whom an option has been granted, adversely affect the
rights of the holder of the option.

OTHER STOCK OPTIONS

   From time to time,  the Board of  Directors  of Orion  may grant  options  to
purchase  shares of Orion Common Stock outside of the 1987 Employee Stock Option
Plan and  Non-Employee  Director  Stock  Option  Plan.  As of November 30, 1996,
options to purchase an  aggregate  of 123,987  shares of Orion 

                                      114
<PAGE>

Common Stock were outstanding outside of such plans at an average exercise price
of $8.30.  During  1995,  6,463  options  granted  outside  of such  plans  were
exercised.

OTHER EMPLOYEE BENEFIT PLANS

   1997 Employee Stock Purchase Plan. In September 1996,  Orion adopted its 1997
Employee  Stock  Purchase  Plan (the  "Stock  Purchase  Plan").  Under the Stock
Purchase  Plan,  eligible  employees  may purchase up to an aggregate of 500,000
shares of Orion Common Stock  through  payroll  deductions.  Eligible  employees
include all employees except those who have been employed by Orion for less than
three  months,  those who work less than five months per  calendar  year or less
than 20 hours per week, and those who would own 5% or more of the total combined
voting power of all classes of Orion's capital stock upon their participation in
the Stock Purchase Plan. The Stock Purchase Plan will terminate at the sooner of
September 2006 or such time as all shares of Orion Common Stock  available under
the Stock Purchase Plan have been issued.

   The Stock  Purchase  Plan is  administered  by the  Board,  but the Board has
delegated  administration  to its Human  Resources and  Compensation  Committee.
Employees may commence  participation in the Stock Purchase Plan or change their
payroll  deduction  percentages  effective  at the  beginning  of each  calendar
quarter. On the last day of each quarter, all funds accumulated in an employee's
account are used to purchase  shares of Orion Common  Stock at a purchase  price
equal to the lesser of 85% of the fair market  value of such Orion  Common Stock
(i) on the first  trading day of the quarter or (ii) on the last  trading day of
the  quarter,  but in no event  shall the  per-share  price be less than the par
value of the Orion  Common  Stock  ($.01).  No employee  may purchase in any one
calendar year shares of Orion Common Stock having an aggregate fair market value
in excess of $25,000. Orion Common Stock purchased under the Stock Purchase Plan
are entitled to full dividend participation.

   An employee's  participation  in the Stock  Purchase  Plan  terminates in the
event the  employee  voluntarily  terminates  such  participation,  ceases to be
employed by Orion or ceases to be eligible to  participate in the Stock Purchase
Plan, or in the event the Board elects to terminate the Stock  Purchase Plan. An
employee who retires,  is laid off, takes a leave of absence,  dies or suffers a
disability may directly or, in the case of death,  through the employee's estate
withdraw any payroll  deductions  remaining in the employee's  account,  receive
that  number of shares of Orion  Common  Stock which may be  purchased  with the
amount  then  credited  to the  employees  account,  or make  up any  deficiency
resulting  from missed  payroll  deductions  through an immediate  cash payment.
Participation in the Stock Purchase Plan may resume at the beginning of the next
quarter if the employee again becomes eligible to participate.

   The Stock  Purchase  Plan is not subject to the  Employee  Retirement  Income
Security Act of 1974, as amended  ("ERISA"),  nor is it qualified  under Section
401(a) of the Code.  As of November  15,  1996,  no shares of Orion Common Stock
have been purchased or issued under the Stock Purchase Plan.

   1997 401(k) Profit  Sharing Plan. In September  1996,  Orion adopted its 1997
401(k) Profit Sharing Plan (the "401(k) Plan").  Under the 401(k) Plan, eligible
employees may elect to have a portion of their pay deducted for  investment in a
variety of mutual  funds that invest in equity and debt  securities  and a money
market  account.  In  addition,  Orion  may  in  its  discretion  make  matching
contributions  in the form of cash or in the  equivalent  amount of Orion Common
Stock, and may make profit sharing contributions.  Up to 100,000 shares of Orion
Common Stock are issuable as matching  contributions  under the 401(k) Plan. The
401(k) Plan will continue indefinitely unless terminated by Orion at any time in
its discretion. Orion may also suspend matching and profit sharing contributions
at any time in its sole discretion.

   The 401(k) Plan is administered under a written trust agreement between Orion
and certain  trustees (the "401(k)  Trustees").  The 401(k) Trustees oversee the
investment of employee contributions, and Orion administers all other matters in
connection with the day-to-day  operation of the 401(k) Plan. Eligible employees
may elect to deduct up to $9,500 of their  compensation  on a pre-tax basis in a
given calendar year. The 401(k)  Trustees have  discretion to select among these
investment  media,  or employees may direct the 401(k)  Trustees to invest their
payroll deductions in accordance with specific instructions.  At its discretion,
Orion  may  match  all or part of  employee  payroll  deductions  in cash or the

                                       115

<PAGE>


equivalent  amount  of Orion  Common  Stock.  In  addition,  Orion may also make
additional  profit sharing  contributions  in its  discretion by  distributing a
certain percentage of its profits to employees pro rata based on the ratio of an
employee's   compensation   to  the  total   compensation  of  all  401(k)  Plan
participants.  Orion is responsible for directing the investment of any matching
or profit sharing contributions it makes to employee accounts.

   An employee's  payroll  deductions (and any rollover  contributions  into the
401(k)  Plan) and earnings  thereon are always 100% vested and  non-forfeitable.
Matching and profit sharing contributions become 100% vested and non-forfeitable
for any employee who attains age 65, dies, or becomes disabled while working for
Orion. An employee whose  employment  terminates for any other reason will be 0%
vested in any matching and profit  sharing  contribution  which the employee has
received if the  employee has less than two years of service with Orion and 100%
vested in such matching and profit sharing contributions if the employee has two
or more years of service.  The 401(k) Plan allows  employees to begin  receiving
benefits  upon  age 65 or  upon  becoming  disabled  while  employed  by  Orion.
Employees may also  withdraw from their account in the event of certain  defined
hardships, and may borrow between $1,000 and the lesser of $50,000 or 50% of the
vested  amounts  in  their  accounts  at the  401(k)  Trustee's  discretion.  An
employee's  participation  in the  401(k)  Plan will  terminate  in the event of
voluntary termination by the employee,  termination of the employee's employment
or eligibility, or Orion's election to terminate the 401(k) Plan.

   The  401(k)  Plan is  qualified  under  Section  401(a)  of the Code and as a
qualified cash or deferred compensation  arrangement under Section 401(k) of the
Code.  The  401(k)  Plan  is  also  subject  to  certain  provisions  of  ERISA,
principally  Title I, relating to protection of employee benefit rights,  and to
the  provisions  of the Code relating to  retirement  plans.  As of November 15,
1996, no shares of Orion Common Stock or other cash  matching or profit  sharing
contributions have been distributed under the 401(k) Plan.

                                       116

<PAGE>
            PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                 (UNAUDITED)


   As discussed  more fully under the caption "The Merger,  the Exchange and the
Debenture  Investments,"  pursuant  to the  Merger,  each share of Orion  Common
Stock, Orion Series A Preferred Stock and Orion Series B Preferred Stock will be
converted into the right to receive one share of Orion Newco Common Stock, Orion
Newco  Series A  Preferred  Stock  and Orion  Newco  Series B  Preferred  Stock,
respectively.  In  addition,  pursuant to the  Exchange,  Orion Newco will issue
shares of Orion Newco  Series C  Preferred  Stock for the  Exchanging  Partners'
limited partnership  interests in Orion Atlantic,  a consolidated  subsidiary of
Orion,  as  a  result  of  which,  among  other  things,  Orion  Newco  and  its
subsidiaries  (including  Orion)  will  become the owner of all the  partnership
interests in Orion Atlantic.  Orion Newco will also acquire  approximately $37.5
million of Orion Atlantic's obligations to the Exchanging Partners.

   The Merger will be accounted for as a reorganization of entities under common
control.  As a result,  the assets and liabilities  transferred  pursuant to the
Merger will be accounted for at historical cost in a manner similar to a pooling
of interests.  The Exchange will be accounted for as an  acquisition of minority
interests using purchase accounting.  As a result, the assets and liabilities of
Orion  Atlantic  will be revalued to fair value to the extent of the  Exchanging
Partners'  interests acquired as a result of the Exchange.  The determination of
the fair value of the Orion Newco  Series C Preferred  Stock has been based on a
fairness  opinion  issued by Salomon  Brothers dated December 10, 1996 (see "The
Merger,  the  Exchange  and the  Debenture  Investments  --  Opinion  of Orion's
Financial  Advisor").  Such value has been allocated to Orion Atlantic's  assets
and  liabilities  based on the  estimate  of fair  market  value of the  Orion 1
satellite as of December 1, 1996 of $304 million  provided in an appraisal dated
December 20, 1996 from Ascent  Communications  Advisors,  L.P., and management's
best estimate of fair value for other assets and liabilities of Orion Atlantic.

   In addition to the Merger,  the Exchange and the Debenture  Investments,  the
pro forma  condensed  consolidated  balance  sheet at  September  30, 1996 gives
effect  to the  following  transactions,  which  are,  directly  or  indirectly,
conditions  precedent to the Merger, the Exchange and the Debenture  Investments
as described  above,  as if they took place on that date: (i) the Notes Offering
(including the use of the net proceeds therefrom to repay indebtedness under the
Orion 1 Credit Facility and to prefund the first six scheduled interest payments
and to pay interest rate hedge breakage costs associated with the Orion 1 Credit
Facility),  (ii) the British  Aerospace  Investment,  with gross proceeds of $50
million  (and the  application  of $1  million of the  proceeds  thereof to make
interest payments under the Orion 2 Satellite Contract and the Orion 3 Satellite
Contract),  (iii) the  satisfaction  of $13 million owed to Matra  Marconi Space
through the Matra Marconi Investment of $10 million and $3 million of cash, (iv)
the  acquisition  by Orion of British  Aerospace's  17%  ownership of Orion Asia
Pacific for  approximately  86,000 shares of Orion Common Stock, (v) payments of
approximately $3.9 million,  including accrued interest,  owed to STET, a former
Limited  Partner,  and (vi) the  write-off  of  deferred  financing  fees  (such
transactions collectively with the Merger and the Exchange, the "Transactions").
The pro forma condensed consolidated statements of operations for the year ended
December  31,  1995 and the nine  months  ended  September  30,  1996  have been
prepared as if the Transactions took place on January 1, 1995. The unaudited pro
forma condensed  consolidated financial statements do not purport to present the
actual  financial  position  or results of  operations  of the  Company  had the
Transactions in fact occurred on the dates specified, nor are they indicative of
the results of operations that may be achieved in the future.  The unaudited pro
forma condensed  consolidated  financial statements are based on the assumptions
and adjustments further described herein.

                                       117

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
                PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                              SEPTEMBER 30, 1996
                                 (UNAUDITED)

<TABLE>
<CAPTION>
                                          ACTUAL           DEBIT           CREDIT         PRO FORMA
                                      -------------- ---------------- ---------------- ---------------
<S>                                   <C>            <C>              <C>              <C>
Current assets:
Cash and cash equivalents...........  $ 36,656,619   $260,125,000 (1)  $216,280,254 (2)   $122,338,532
                                                       48,750,000 (3)     3,050,000 (4)
                                                                          3,862,833 (5)
Accounts receivable.................     5,808,568                                           5,808,568
Accrued interest....................       157,125                                             157,125
Prepaid expenses and other..........     5,584,196                                           5,584,196
                                      --------------  ----------------   ---------------- ---------------
Total current assets................    48,206,508    308,875,000       223,193,087        133,888,421
Property and equipment: ............
Land................................        73,911                                              73,911
Telecommunications..................    22,707,786                                          22,707,786
Furniture and computer..............     4,598,505                                           4,598,505
Satellite and related...............   322,450,415      1,000,000 (3)    27,751,744 (6)    323,466,583
                                                       27,767,912 (6)
                                      -------------- ---------------- ---------------- ---------------
                                       349,830,617     28,767,912        27,751,744       350,846,785
Less accumulated depreciation ......   (57,914,578)    27,751,744 (6)                     (30,162,834)
                                      -------------- ---------------- ---------------- ---------------
Net property and equipment..........   291,916,039     56,519,656        27,751,744       320,683,951
Deferred financing costs............    11,208,678     14,875,000 (1)    11,208,678 (2)    15,175,000
                                                          250,000 (3)
                                                           50,000 (4)
Restricted cash ....................                   72,000,000 (1)                      72,000,000
Other assets........................     4,645,948      1,200,000 (3)                      24,544,477
                                                       18,698,529 (6)
                                                     ---------------- ---------------- ---------------
Total assets........................  $355,977,173   $472,468,185      $262,153,509      $566,291,849
                                      ============== ================ ================ ===============
Current liabilities: ...............
Accounts payable....................  $  4,094,026                                       $  4,094,026
Accrued liabilities.................     7,374,884                                          7,374,884
Other current liabilities...........     5,402,117                                          5,402,117
                                                     
Interest payable....................     3,128,365   $  3,038,858 (2,5)                        89,507
Current portion of long term debt ..    33,873,930     27,496,124 (2)                       6,377,806
                                      -------------- ---------------- ---------------- ---------------
Total current liabilities...........    53,873,322     30,534,982                          23,338,340
                                                                      
Long term debt......................   221,781,393    180,218,718 (2)  $347,000,000 (1)   425,512,675
                                                       13,000,000 (4)    10,000,000 (4)
                                                        3,500,000 (5)    50,000,000 (3)
                                                        6,550,000 (6)
Other liabilities...................    32,878,061     30,995,875 (6)                       1,882,186
Minority interest Orion Atlantic ...    19,961,032      9,974,466 (2)                              --
                                                        9,986,566 (6)
Minority interests in other
entities............................        52,984                                             52,984
Redeemable preferred stock:  .......
 Series A...........................    15,820,460                                         15,820,460
 Series B...........................     4,718,526                                          4,718,526
 Series C...........................                                     94,000,000 (6)    94,000,000
Stockholders' equity: ..............
Common stock........................       112,325                              857 (3)       113,182
Capital in excess of par............    86,508,773                        1,199,143 (3)    87,707,916
Accumulated deficit.................   (79,729,703)     7,124,717 (2)                     (86,854,420)
                                      -------------- ---------------- ---------------- ---------------
Total stockholders' equity..........     6,891,395      7,124,717         1,200,000           966,678
                                      -------------- ---------------- ---------------- ---------------
Total liabilities and equity .......  $355,977,173   $291,885,324      $502,200,000      $566,291,849
                                      ============== ================ ================ ===============
</TABLE>

                                       118

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
           NOTES TO PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                              SEPTEMBER 30, 1996
                                 (UNAUDITED)


1.   To reflect the estimated  proceeds from the Notes Offering of $332 million,
     net of estimated  financing costs of approximately $15 million. Of the $347
     million of gross proceeds from the Notes Offering,  $ has been allocated to
     the Senior Notes, $ to the Senior Discount Notes and $ to capital in excess
     of par value to  reflect  the  issuance  of the Orion  Newco  Common  Stock
     warrants (the  "Warrants")  based on the estimated  relative fair values of
     the Senior Notes,  the Senior  Discount Notes and the Warrants.  The Senior
     Notes and Senior Discount Notes are assumed to bear interest at 11.875% and
     13.125% per annum,  respectively,  and are due in 2007. No assurance can be
     given that the value  allocated to the Warrants is  indicative of the price
     at which the Warrants may actually trade.  Of such proceeds,  approximately
     $72  million  will be  placed in an  escrow  account  to fund the first six
     scheduled  interest  payments  on the Senior  Notes.  Such  amount has been
     reflected  as  restricted  cash.  The actual  amount  placed in escrow will
     depend on the interest on the Senior Notes and on market  interest rates on
     the closing date of the Notes Offering.

2.   To reflect the  repayment of $207.7  million plus accrued  interest of $2.7
     million (as of September 30, 1996) under the Orion 1 Credit  Facility,  the
     write-off of  unamortized  deferred  financing  costs of $11.2  million and
     interest  rate  hedge  breakage  costs  of $5.9  million,  and the pro rata
     allocation of such costs to the minority  interests of Orion  Atlantic.  At
     January 30, 1997,  the expected  closing  date of the Notes  Offering,  the
     aggregate  principal  and  interest  outstanding  under  the Orion 1 Credit
     Facility will be $216 million.

3.   To reflect (i) the estimated proceeds from the British Aerospace Investment
     of $49.8 million, net of estimated financing costs of $.2 million, (ii) the
     initial  down  payment  of $1  million  to  Matra  Marconi  Space  to begin
     construction  of Orion 2 and  (iii)  the  acquisition  by Orion of  British
     Aerospace's 17% common stock interest in Orion Asia Pacific, a consolidated
     subsidiary (for  approximately  $1.2 million in Orion Common Stock),  which
     will be completed in connection with the Transactions.

4.   To record the payment of accrued satellite  incentive  obligations to Matra
     Hachette of $13 million, Matra's Marconi Space's corresponding reinvestment
     of $10 million in Debentures, and financing costs of $50,000.

5.   To reflect  the  repayment  of $3.5  million of  promissory  notes and $0.4
     million of accrued  interest (as of September  30, 1996) thereon to STET, a
     former  limited  partner,  required to be paid as a result of the Exchange.
     See "Certain Transactions."

6.   To reflect the effects of the Exchange Agreement, including the acquisition
     by Orion of certain  obligations  to the  Exchanging  Partners  aggregating
     approximately  $37.5  million,  through  the  exchange  of  the  Exchanging
     Partners'  partnership interests in Orion Atlantic for Orion Newco Series C
     Preferred  Stock.  The Orion Newco Series C Preferred Stock has been valued
     at  approximately  $94  million  based on a fairness  opinion  prepared  by
     Salomon  Brothers dated December 10, 1996 using an underlying  Orion Common
     Stock  price of $12 per  share  (see  "The  Merger,  the  Exchange  and the
     Debenture  Investments  --  Opinion of Orion's  Financial  Advisor").  Such
     amount  has  been  allocated  to the  obligations  acquired  and the  58.7%
     interest of Orion Atlantic previously held by the Exchanging Partners. Such
     allocation results in a step up in basis of approximately $46.5 million, of
     which $27.8 million had been allocated to the Orion 1 satellite based on an
     appraisal prepared by Ascent Communications  Advisors,  L.P. estimating the
     fair value of the Orion 1 satellite to be $304 million.  The remaining step
     up of $18.7 million has been  allocated to costs in excess of fair value of
     net assets acquired and is included in Other Assets in the accompanying Pro
     Forma Condensed  Consolidated Business Sheet.  Accumulated  depreciation of
     $27.8  million  relating to the portion of the  satellite  revalued to fair
     value has been offset against the basis of the satellite.

                                       119

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
           PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                     NINE MONTHS ENDED SEPTEMBER 30, 1996
                                 (UNAUDITED)

<TABLE>
<CAPTION>
                                                ACTUAL           DEBIT        CREDIT      PRO FORMA
                                           --------------- ---------------- --------- ----------------
<S>                                        <C>             <C>              <C>       <C>
Revenues ................................  $ 30,015,517                               $ 30,015,517
Operating expenses: .....................
Direct...................................     4,285,834                                  4,285,834
Sales and marketing......................     7,792,666                                  7,792,666
Engineering and technical services ......     6,333,525                                  6,333,525
General and administrative...............    11,469,235                                 11,469,235
Depreciation and amortization............    26,402,947    $ 3,362,919 (1)              29,765,866
                                           --------------- ---------------- --------- ----------------
Total....................................    56,284,207      3,362,919                  59,647,126
                                           --------------- ---------------- --------- ----------------
Loss from operations.....................   (26,268,690)     3,362,919                 (29,631,609)
Other expense (income): .................
Interest income..........................    (1,841,868)                                (1,841,868)
Interest expense.........................    20,228,519     19,292,733 (2)              39,521,252
Other....................................       (48,356)                                   (48,356)
                                           --------------- ---------------- --------- ----------------
Total other expense (income).............    18,338,295     19,292,733                  37,631,028
                                           --------------- ---------------- --------- ----------------
Loss before minority interest............   (44,606,985)    22,655,652                 (67,262,637)
Minority interest........................    24,799,698     24,799,698 (3)                      --
                                           --------------- ---------------- --------- ----------------
Net loss.................................   (19,807,287)    47,455,350                 (67,262,637)
Preferred stock dividend and accretion ..     1,006,285      6,329,100 (4)               7,335,385
                                           --------------- ---------------- --------- ----------------
Net loss attributable to common
shareholders.............................  $(20,813,572)   $53,784,450                $(74,598,022)
                                           =============== ================ ========= ================
Net loss per common share................  $      (1.90)                              $      (6.46)
                                           ===============                            ================
Weighted average common shares
outstanding..............................    10,943,287                                  11,544,626 (5)
                                           ===============                            ================
</TABLE>

                                       120

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
      NOTES TO PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                     NINE MONTHS ENDED SEPTEMBER 30, 1996
                                 (UNAUDITED)

1.   To reflect depreciation on the step up in basis on the Orion 1 satellite of
     $2.0  million  and the  amortization  of excess cost over fair value of net
     assets  acquired of $1.3  million  resulting  from the  acquisition  of the
     Limited  Partners'   partnership  interests  in  Orion  Atlantic  over  the
     estimated useful life of the satellite of 10.5 years.

2.   To reflect the adjustment to interest as follows:

<TABLE>
<CAPTION>
<S>                                                                                    <C>
Reduction in Orion 1 Credit Facility interest expense................................  $(12,096,466)
Reduction in Orion 1 Credit Facility interest rate cap expense.......................    (1,067,500)
Reduction in amortization of deferred financing costs on the Orion 1 Credit
  Facility ..........................................................................    (1,597,941)
Interest expense on Senior Notes.....................................................    19,771,875
Interest expense on Senior Discount Notes............................................    14,266,277
Interest expense on Debentures, net of amounts capitalized related to construction
  of Orion 2 of $3.2 million.........................................................       695,625
Interest expense from amortization of deferred financing costs on new borrowings ....     1,115,625
Reduction in interest expense relating to repayment of other obligations to Limited
Partners  ...........................................................................    (1,794,762)
                                                                                       ---------------
 Net increase in pro forma interest expense..........................................  $ 19,292,733
                                                                                       ===============

</TABLE>

     The Senior Notes and Senior  Discount Notes are assumed to bear interest at
     a rate of 11.875% and  13.125%,  respectively,  per annum.  A change in the
     interest rate on the Notes of 0.5% would result in a change of $1.3 million
     in interest  expense for the nine months  ended  September  30,  1996.  The
     amount of pro forma  interest  expense  with  respect to the Notes does not
     give the  effect  to any  allocation  of the  gross  proceeds  of the Notes
     Offering  between  the Notes and  Warrants.  Because a portion of the gross
     proceeds  will be  allocated  to the  Warrants,  the  discount on the Notes
     resulting  therefrom  will be accreted  into  interest  expense  (using the
     interest method) over the term of the Notes.

3.   Elimination of minority interest as a result of the Exchange.

4.   To record the  dividend  requirement  on the Orion Newco Series C Preferred
     Stock issued as a result of the  Exchange as well as pro rata  accretion to
     redemption value over a 25 year-period.

5.   Pro forma  weighted  average shares  outstanding  for the nine months ended
     September 30, 1996 consist of:

<TABLE>
<CAPTION>
<S>                                                                             <C>
Historical weighted average shares outstanding................................  10,943,287
Pro forma issuance of shares to British Aerospace and Matra Marconi Space for
interest on $60 million Debentures ...........................................     515,625
Pro forma issuance of shares to British Aerospace for purchase of 17%
minority interest in Orion Asia Pacific ......................................      85,714
                                                                                ------------
Total pro forma weighted average shares outstanding...........................  11,544,626
                                                                                ============

</TABLE>

                                       121

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
           PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                         YEAR ENDED DECEMBER 31, 1995
                                 (UNAUDITED)

<TABLE>
<CAPTION>
                                             ACTUAL           DEBIT        CREDIT     PRO FORMA
                                        --------------- ---------------- --------- ---------------
<S>                                     <C>             <C>              <C>       <C>
Revenues..............................  $ 22,283,882                               $   22,283,882
Operating expenses: ..................
Direct................................    10,485,745                                   10,485,745
Sales and marketing...................     8,613,399                                    8,613,399
Engineering and technical services ...     8,539,644                                    8,539,644
General and administration............    10,072,429                                   10,072,429
Depreciation and amortization.........    31,403,376    $ 4,253,528 (1)                35,656,904
                                        --------------- ---------------- --------- ---------------
Total.................................    69,114,593      4,253,528                    73,368,121
                                        --------------- ---------------- --------- ---------------
Loss from operations..................   (46,830,711)     4,253,528                   (51,084,239)
Other expense (income): ..............
Interest income.......................    (1,924,822)                                  (1,924,822)
Interest expense......................    24,738,446     25,898,354 (2)                50,636,800
Other.................................     3,359,853                                    3,359,853
                                        --------------- ---------------- --------- ---------------
Total other expense (income)..........    26,173,477     25,898,354                    52,071,831
                                        --------------- ---------------- --------- ---------------
Loss before minority interest.........   (73,004,188)    30,151,882                  (103,156,070)
Minority interest.....................    46,089,010     46,089,010 (3)                        --
                                        --------------- ---------------- --------- ---------------
Net loss..............................   (26,915,178)    76,240,892                 (103,156,070)
Preferred stock dividend and
accretion.............................     1,329,007      8,438,800 (4)                 9,767,807
                                        --------------- ---------------- --------- ---------------
Net loss attributable to common
shareholders..........................  $(28,244,185)   $84,679,692                $ (112,923,877)
                                        =============== ================ ========= ===============
Net loss per common share.............  $      (3.07)                              $       (12.01)
                                        ===============                            ===============
Weighted average common shares
outstanding...........................     9,103,505                                    9,376,719 (5)
                                        ===============                            ===============

</TABLE>

                                       122

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
      NOTES TO PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                         YEAR ENDED DECEMBER 31, 1995
                                 (UNAUDITED)

1.   To reflect depreciation on the step up in basis on the Orion 1 satellite of
     $2.5  million  and the  amortization  of excess cost over fair value of net
     assets  acquired of $1.7  million  resulting  from the  acquisition  of the
     Exchanging  Partners'  partnership  interests  in Orion  Atlantic  over the
     estimated useful life of the satellite of 10.5 years.

2.   To reflect the adjustment to interest expense as follows:

<TABLE>
<CAPTION>
<S>                                                                                              <C>
Reduction in Orion 1 Credit Facility interest expense..........................................  $(17,437,104)
Reduction in Orion 1 Credit Facility interest rate cap expense.................................      (426,250)
Reduction in amortization of deferred financing costs on the Orion 1 Credit Facility ..........    (2,012,222)
Interest expense on Senior Notes ..............................................................    26,362,500
Interest expense on Senior Discount Notes......................................................    16,824,834
Interest expense on Debentures net of amounts capitalized related to construction of Orion 2
of $2.3 million................................................................................     2,993,219
Interest expense from amortization of deferred financing costs on new borrowings ..............     1,487,500
Reduction in interest expense relating to repayment of other obligations to Limited
Partners   ....................................................................................    (1,894,123)
                                                                                                 ---------------
Net increase in pro forma interest expense.....................................................  $ 25,898,354
                                                                                                 ===============

</TABLE>

     The Senior Notes and Senior  Discount Notes are assumed to bear interest at
     a rate of 11.875% and  13.125%,  respectively,  per annum.  A change in the
     interest rate on the Notes of 0.5% would result in a change of $1.7 million
     in interest expense for the year ended December 31, 1995. The amount of pro
     forma  interest  expense  with respect to the Notes does not give effect to
     any  allocation  of the gross  proceeds of the Notes  Offering  between the
     Notes  and  Warrants.  Because  a portion  of the  gross  proceeds  will be
     allocated to the Warrants,  the discount on the Notes  resulting  therefrom
     will be accreted into interest expense (using the interest method) over the
     term of the Notes.

3.   Elimination of minority interest as a result of the Exchange.

4.   To record the  dividend  requirement  on the Orion Newco Series C Preferred
     Stock issued as a result of the  Exchange as well as pro rata  accretion to
     redemption value over a 25-year period.

5.   Pro forma weighted  average shares  outstanding for the year ended December
     31, 1995 consist of:

<TABLE>
<CAPTION>
<S>                                                                                            <C>
Historical weighted average shares outstanding...............................................  9,103,505
Pro forma issuance of shares to British Aerospace and Matra Marconi Space for interest on
$60 million Debentures.......................................................................    187,500
Pro forma issuance of shares to British Aerospace for purchase of 17% minority interest in
Orion Asia Pacific     ......................................................................     85,714
                                                                                               -----------
Total pro forma weighted average shares outstanding..........................................  9,376,719
                                                                                               ===========

</TABLE>

                                       123

<PAGE>

        SELECTED CONSOLIDATED FINANCIAL AND OPERATIONAL DATA OF ORION
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

   The following  selected  consolidated  statements  of operations  and balance
sheet data as of and for the years ended December 31, 1991, 1992, 1993, 1994 and
1995 are derived from the Company's audited consolidated  financial  statements.
The selected consolidated  statements of operations and balance sheet data as of
September 30, 1996 and for the nine months ended September 30, 1995 and 1996 are
derived from the unaudited consolidated financial statements of the Company and,
in the opinion of the Company,  include all  adjustments,  consisting  of normal
recurring  accruals,  necessary  for a fair  presentation  of such  information.
Operating  results  for  the  nine  months  ended  September  30,  1996  are not
necessarily  indicative  of the results that may be achieved for the year ending
December 31, 1996.  The pro forma  consolidated  statements  of  operations  and
balance  sheet  data  are  derived  from  the  unaudited  Pro  Forma   Condensed
Consolidated  Financial  Statements  included herein. The pro forma data are not
necessarily indicative of the results that would have been achieved nor are they
indicative  of the  Company's  future  results.  The  data  should  be  read  in
conjunction with the Pro Forma Condensed  Consolidated  Financial Statements and
the  Consolidated  Financial  Statements,  related  notes  and  other  financial
information  included  herein.  From its  inception in 1982 through  January 20,
1995,  when Orion 1 commenced  commercial  operations,  Orion was a  development
stage enterprise.  Because of Orion's exclusive  management and control of Orion
Atlantic as its sole general  partner  (subject to certain rights of approval by
the Limited Partners),  and Orion's aggregate 33 1/3% (through November 1995, 41
2/3% from December 1995 through the present) partnership interest, the financial
statements of Orion Atlantic are consolidated  with the financial  statements of
Orion.  See  "Management's  Discussion  and Analysis of Financial  Condition and
Results of Operations  of Orion," "Pro Forma  Condensed  Consolidated  Financial
Statements" and the Consolidated Financial Statements and Notes thereto.

<TABLE>
<CAPTION>
                                                                                                         
                                                         YEAR ENDED DECEMBER 31,                         
                                 ----------------------------------------------------------------------- 
                                                                                               1995 PRO  
                                     1991        1992      1993 (1)      1994        1995      FORMA(2)  
                                 ----------- ----------- ----------- ----------- ----------- ----------- 
<S>                              <C>         <C>         <C>         <C>         <C>         <C>         
Consolidated Statements of
Operations Data:
Revenues.......................  $      648  $    1,403  $    2,006  $    3,415  $   22,284  $   22,284  
Interest expense...............         456         180         133          61      24,738      50,637  
Net loss.......................      (2,573)     (3,295)     (7,886)     (7,965)    (26,915)   (103,156) 
Net loss per common share .....  $    (0.35) $    (0.40) $    (0.85) $    (0.86) $    (3.07) $   (12.01) 
Shares used in calculating per
share data(3)..................   7,318,147   8,232,548   9,266,445   9,272,166   9,103,505   9,376,719  
                                 ----------- ----------- ----------- ----------- ----------- ----------- 
Ratio of earnings to fixed
charges(4).....................          --          --          --          --          --          --  
Other Operating Data: .........
Number of customers............           3           5          10          34         109              
Capital expenditure............  $   44,036  $   78,429  $   44,130  $   51,103  $    9,060              
Customer contract backlog(5) ..  $    4,572  $    9,402  $   18,185  $   39,122  $  120,612              
Points of Service(6)...........          --                                  57         151              
EBITDA (7).....................  $   (1,852) $   (6,243) $   (9,069) $  (14,014) $  (15,427)             

</TABLE>
                                               NINE MONTHS
                                           ENDED SEPTEMBER 30,
                                   -------------------------------------
                                                              1996 PRO
                                      1995        1996         FORMA(2)
                                  ----------- ------------   ------------
Consolidated Statements of
Operations Data:
Revenues.......................   $   13,947  $    30,016   $    30,016
Interest expense...............       17,080       20,229        39,521
Net loss.......................      (19,985)     (19,807)      (67,263)
Net loss per common share .....   $    (2.42) $     (1.90)  $     (6.46)
Shares used in calculating per
share data(3)..................    8,522,067   10,943,287    11,544,626
                                  ----------- ------------   ------------
Ratio of earnings to fixed
charges(4).....................           --           --            --
Other Operating Data: .........
Number of customers............           79          167
Capital expenditure............   $    3,863  $    10,266
Customer contract backlog(5) ..   $   94,890  $   134,320   $   123,000
Points of Service(6)...........          124          304
EBITDA (7).....................   $  (15,177) $       134
<TABLE>
<CAPTION>

<PAGE>

                                                                                                           AS OF SEPTEMBER 30,
                                                                                                                  1996
                                                                                                         ----------------------
                                                                                                                        PRO
                                                                                                           ACTUAL    FORMA(2)
                                                                                                         --------- ------------
<S>                                <C>       <C>       <C>       <C>       <C>                           <C>       <C>     
Consolidated Balance Sheet
Data:
Cash and cash equivalents........  $ 26,507  $  7,668  $  3,404  $ 11,219  $ 55,112                      $ 36,657  $122,339
Restricted Cash(8)...............        --        --        --        --        --                            --    72,000
Total assets.....................   106,712   204,975   271,522   340,176   389,075                       355,977   566,292
Long-term debt (less current
portion).........................     1,073   106,821   185,294   230,175   250,669                       221,781   425,513
Limited Partners' interest in
OrionAtlantic(9).................    77,683    77,753    69,909    62,519    14,626                        19,961        --
Redeemable preferred stock ......        --        --        --    14,555    20,358                        20,539   114,539
Total stockholders' equity
(deficit)........................     2,559    14,478     8,400     3,351    26,681                         6,891       967
Book value per share ............       .44      2.26      1.26      .49       2.46                           .63       .09
</TABLE>
- ----------
(1)  In 1993,  Orion  Atlantic  terminated  its  commitment to purchase a second
     satellite from MMS Space Systems,  resulting in a termination  charge of $5
     million. See Note 3 to the Consolidated Financial Statements.

                                       124

<PAGE>

(2)  Adjusted to reflect  the pro forma  effects of the  Transactions  (see "Pro
     Forma Condensed Consolidated Financial  Statements"),  assuming such events
     occurred, in the case of the Consolidated Statements of Operations Data, on
     January 1, 1995 and, in the case of the Balance  Sheet Data,  on  September
     30, 1996.

(3)  Computed on the basis  described for net loss per common share in Note 2 to
     the Consolidated Financial Statements.

(4)  For purposes of the ratio of earnings to fixed charges, earnings consist of
     earnings from  continuing  operations,  plus fixed  charges  reduced by the
     amount of  unamortized  interest  capitalized.  Fixed  charges  consist  of
     interest on all indebtedness (including commitment fees and amortization of
     deferred  financing  costs) plus the portion of rent  expense  representing
     interest  (estimated to be one-third of such expense).  For the years ended
     December 31, 1991,  1992,  1993,  1994 and 1995,  and the nine months ended
     September  30,  1995 and 1996,  earnings  were  inadequate  to cover  fixed
     charges by $2.6 million, $8.8 million,  $24.0 million, $35.2 million, $28.2
     million,  $21.3  million and $19.8  million,  respectively.  On a pro forma
     basis assuming  consummation of the  Transactions,  earnings would not have
     been  sufficient to cover fixed charges by $105.4 million and $70.5 million
     for the year ended  December 31, 1995 and the nine months  ended  September
     30, 1996,  respectively.  A 0.5% increase in the assumed  interest rates on
     the Notes would result in pro forma deficiencies of earnings to cover fixed
     charges of  approximately  $107.1  million for the year ended  December 31,
     1995 and $71.8 million for the nine months ended September 30, 1996.

(5)  Backlog  represents  future revenues under  contract.  See "Risk Factors --
     Risks Relating to Orion's Business -- Uncertainties Relating to Backlog."

(6)  Points of service  includes  installed  VSATs and  additional  transmission
     destinations (such as customer premises) that share a VSAT.

(7)  "EBITDA" represents  earnings before minority  interests,  interest income,
     interest expense, net of other expense (income), income taxes, depreciation
     and amortization. EBITDA is commonly used in the communications industry to
     analyze  companies  on the basis of  operating  performance,  leverage  and
     liquidity.  EBITDA is not intended to  represent  cash flows for the period
     and  should  not  be  considered  as an  alternative  to  cash  flows  from
     operating,  investing or financing  activities  as determined in accordance
     with GAAP. EBITDA is not a measurement under GAAP and may not be comparable
     to other  similarly  titled  measures  of other  companies.  Other  expense
     (income)  includes  gains on sale of equipment  less costs of $5 million in
     1993  associated  with  the  termination  of the  Company's  commitment  to
     purchase a second  satellite and  the  write-off  of costs  relating to the
     1995 Financing of $3.4 million in the fourth quarter of 1995.

(8)  Restricted cash represents the estimated $72 million that will be placed in
     escrow on the closing date of the Notes Offering to fund the payment of the
     first six scheduled  payments of interest on the Senior  Notes.  The actual
     amount to be placed in escrow and reflected as restricted  cash will depend
     on the interest  rate on the Senior Notes and interest  rates on government
     securities on such closing date.

(9)  Represents  amounts invested by Limited Partners (net of syndication  costs
     related to the  investments),  adjusted for such Limited Partners' share of
     net losses.  The interests of the Limited  Partners will be acquired by the
     Company in the Exchange.


                                       125

<PAGE>
         MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                      AND RESULTS OF OPERATIONS OF ORION

GENERAL

   Orion's principal  business is the provision of satellite  communications for
private  communications  networks  and video  distribution  and other  satellite
transmission services. From its inception in 1982 through January 20, 1995, when
Orion  1  commenced  commercial  operations,   Orion  was  a  development  stage
enterprise.  Prior to January 1995,  Orion's  efforts were devoted  primarily to
monitoring  the  construction,  launch and in-orbit  testing of Orion 1, product
development,  marketing  and sales of  interim  private  communications  network
services, raising financing and planning Orion 2 and Orion 3.

   OrionSat is the sole general partner in Orion Atlantic and Orion has a 41 2/3
% equity interest in Orion  Atlantic.  Orion will become the 100% owner of Orion
Atlantic upon consummation of the Exchange. 

   As a result  of  Orion's  control  of Orion  Atlantic,  Orion's  consolidated
financial  statements  include  the  accounts  of Orion  Atlantic.  All of Orion
Atlantic's revenues and expenses are included in Orion's consolidated  financial
statements,  with appropriate adjustment to reflect the interests of the Limited
Partners  in Orion  Atlantic's  losses  prior to the  Exchange.  The  assets and
liabilities  reported in the consolidated  balance sheets at September 30, 1996,
December 31, 1995 and December 31, 1994 primarily pertain to Orion Atlantic.

OVERVIEW

   Orion's revenues are principally generated under three to four year contracts
for delivery of  communications  services.  Such revenues,  substantially all of
which are  generated  through  Orion  Atlantic,  are  derived  principally  from
recurring  monthly fees from its  customers,  although  many  contracts  include
initial  non-recurring  installation  and other fees. These  non-recurring  fees
generally are structured to cover the Company's  actual costs of installation of
the  customer's  site-based  equipment.  The revenues from each  contract  vary,
depending upon the type of service, amount of capacity, data handling ability of
the  network,  the  number  of VSATs  (which  generally  are  owned  by  Orion),
value-added  services  and other  factors.  Depending on the  complexity  of the
services to be provided to a customer,  the period between the date of signature
of a contract  and the  commencement  of actual  services  (and receipt of fees)
typically  ranges  from 30  days to six  months.  Substantially  all of  Orion's
contracts  are  denominated  in  U.S.  dollars,   although  some  contracts  are
denominated  in pounds  sterling,  deutschemarks,  Austrian  shillings or French
francs.  See "Risk  Factors -- Risks  Relating  to Orion's  Business -- Risks of
Conducting  International  Business."  Orion begins to record revenues under its
contracts upon service  commencement to the customer.  

   The services  provided by Orion have been subject to  decreasing  prices over
recent  years  and this  pricing  pressure  is  expected  to  continue  (and may
accelerate) for the foreseeable  future,  particularly if capacity  continues to
increase, which it may. Orion will need to increase its volume of sales in order
to compensate  for such price  reductions.  Orion  believes that  customers will
increase  the data  speeds  in their  communications  networks  to  support  new
applications,  and  that  such  upgrading  of  customer  networks  will  lead to
increased revenues that will mitigate the effect of price reductions.

See "Risk  Factors -- Risks  Relating to Orion's  Business -- Potential  Adverse
Effects of  Competition."  Orion  expects to  continue to incur  increasing  net
losses and  negative  cash flow (after  payments  for capital  expenditures  and
interest) for the foreseeable future.

   Orion's direct cost of services  includes  principally  (i) costs relating to
the  installation,  maintenance  and  licensing  of VSAT earth  stations  at its
customers'  premises;  (ii) satellite  lease payments for  transponder  capacity
(generally for services outside of the Orion 1 footprint);  and (iii) associated
miscellaneous expenses.  Sales and marketing expenses consist of salaries, sales
commissions (including commissions to third party sales representatives), travel
and  promotional  expenses.  The Company has  recently  commenced a  significant
expansion  of its  marketing  program  and expects to  continue  this  expansion
through 1997. Due to the complexity of the Company's services,  and the expected
turnover  of
                                       126

<PAGE>

new sales  personnel,  sales and  marketing  expense  is  expected  to  increase
significantly  during  1997.  Engineering  and  technical  expenses,  consisting
principally of personnel costs and travel,  relate to TT&C, network  monitoring,
network  design  and  similar  activities.  The  Company  constructed  its  TT&C
facilities to control two  satellites.  As a result,  the Company  anticipates a
slight increase in costs with Orion 2 and a more  substantial  increase in costs
with  Orion  3,  which  will  require  separate  TT&C  facilities.  General  and
administrative expenses consist of in-orbit insurance premiums,  personnel costs
other  than for  selling  and  engineering,  information  systems,  professional
services,  and  occupancy  costs.  These costs will  increase  generally  as the
Company's  operations  expand.  Specifically,   in-orbit  insurance  costs  will
increase  significantly   following  the  launches  of  Orion  2  and  Orion  3.
Depreciation  and  amortization  expenses result mainly from the depreciation of
the Orion 1 satellite,  VSATs and the related equipment to service the expansion
of the private network communication  services business (see Note 2 of the Notes
to Consolidated  Financial Statements) and will increase substantially after the
launch  of Orion 2 and  Orion 3.  Interest  income is  primarily  the  result of
interest  earned  on  the  proceeds  from  Orion's  private  and  public  equity
offerings.  Interest costs will increase  substantially as a result of the Notes
Offering and will  increase  again after  additional  financing  for Orion 2 and
Orion 3 is obtained.  Interest  expenses  are  associated  with  Orion's  credit
facilities used to fund the  construction  and launch of Orion 1 and the related
tracking,  telemetry  and  control  facility.  Such  financing  will be required
substantially  in advance of the  anticipated  revenues from Orion 2 or Orion 3.
Orion's costs (other than sales commissions) generally do not vary substantially
with the amount of revenue from the Orion 1 satellite.

RESULTS OF OPERATIONS

NINE MONTHS ENDED SEPTEMBER 30, 1996 COMPARED TO THE NINE MONTHS ENDED
SEPTEMBER 30, 1995

   Revenue. Total revenue for the nine months ended September 30, 1996 was $30.0
million,  compared to $13.9  million for the same period in 1995, an increase of
116%,   resulting  from  increased  volume  of  sales.   Revenues  from  private
communications  network services were $11.6 million for the first nine months of
1996 compared to $4.8 million for the  comparable  period in 1995, as the number
of points of  service  increased  to 304 as of  September  30,  1996 from 124 at
September  30,  1995.  Revenues  from  video  distribution  and other  satellite
transmission  services  were $18.2  million  for the first  nine  months of 1996
compared  to  $8.4  million  for the  same  period  in  1995,  resulting  from a
substantial increase in customers for these services in 1996.

OPERATING EXPENSES

   Direct  expenses.  Direct  expenses for the nine months ended  September  30,
1996,  were $4.3 million  compared to $10.0 million for the same period in 1995.
The decrease of $5.7 million, or 57%, was primarily attributable to accruals for
satellite incentive  obligations owed by Orion to the contractor under the Orion
1 Satellite Contract during the initial satellite deployment period from January
20, 1995 through June 30, 1995. The Company capitalized the present value of the
remaining  satellite  incentive   obligation  of  approximately  $14.8  million,
effective  July 1, 1995, as part of the cost of the  satellite.  As of September
30, 1996,  Orion had  obligations  with a present value of  approximately  $21.7
million with respect to satellite incentives.

   Sales and marketing expenses.  Sales and marketing expenses were $7.8 million
for the nine months ended September 30, 1996, as compared to $5.9 million in the
same  period  of  1995.  The  increase  of  $1.9  million,  or 32% is  primarily
attributable to sales  commissions,  third party sales  representative  fees and
ground operator fees  associated  with the growth in the private  communications
network service business.

   Engineering and technical  expenses.  Engineering and technical expenses were
$6.3 million in the nine months ended  September  30, 1996,  as compared to $6.0
million for the  comparable  period in 1995.  The  increase  was due to customer
engineering functions in support of network services.

   General and administrative expenses. General and administrative expenses were
$11.5  million for the nine months ended  September  30, 1996,  compared to $7.2
million for the period ended  September 30, 1995.  The increase of $4.3 million,
or 60%, for the nine months ended  September  30, 1996 was  

                                       127

<PAGE>
primarily due to the  inclusion of the cost of in-orbit  life  insurance for the
entire period during 1996. The policy became effective in May 1995.

   Depreciation and amortization.  Depreciation and amortization expense for the
nine months  ended  September  30, 1996 was $26.4  million,  an increase of $4.1
million,  or 18%,  over the same period in 1995.  The  increase  is  primarily a
result from  depreciation  of VSATs and other  ground  equipment  to service the
expansion  of  the  private   network   communication   services   business  and
depreciation  of the Orion 1 satellite  which was placed in service  January 20,
1995.

   Interest.  Interest  income  was  $1.8  million  for the  nine  months  ended
September 30, 1996, compared to $1.1 million for the nine months ended September
30, 1995. The increase in interest income ($0.7 million or 64%) during the first
three quarters of 1996 is primarily a result of interest  earned on the proceeds
from the Company's initial public offering in August 1995. Interest expense, net
of capitalized  interest,  was $20.2 million for the nine months ended September
30,  1996,  compared to $17.1  million for the  comparable  period in 1995.  The
increase in interest expense of $3.1 million in the first three quarters of 1996
is attributable  to expensing  interest  (including  commitment  fees,  interest
accretion  associated  with  the  Orion 1  satellite  incentive  obligation  and
amortization  of deferred  financing  costs) from the in-service date of Orion 1
and the  impact  of an  interest  rate  cap  agreement  in  1996.  Prior  to the
in-service date of Orion 1,  substantially all interest expense was capitalized.
Interest expense will substantially increase as a result of the Notes Offering.

   Net Loss. The Company incurred a net loss of $19.8 million, compared to a net
loss of $20.0  million for the nine months  ended  September  30, 1996 and 1995,
respectively,  after deduction of the limited partners' and minority  interests'
share in the Company's  losses before  minority  interests' of $24.8 million and
$33.4 million,  respectively.  Net loss is expected to increase substantially in
subsequent  periods as a result of interest expense on the Notes and elimination
of the minority interests in Orion Atlantic.

YEAR ENDED DECEMBER 31, 1995 COMPARED TO THE YEAR ENDED DECEMBER 31, 1994

   Revenue. Services revenue for 1995 was $22.3 million compared to $3.4 million
for 1994.  Revenues  from private  communications  network  services  were $10.0
million from 72 customers in 1995 and $3.4 million from 18 customers in 1994, as
the  number  of sites  in  service  increased  to 143  from  53.  Revenues  from
transmission  capacity and video distribution services were $12.3 million during
1995.  There  were no  revenues  from these  services  during  1994,  as Orion 1
commenced operations on January 20, 1995.

OPERATING EXPENSES

   Direct expenses.  Direct expenses were $10.5 million and $3.5 million in 1995
and 1994,  respectively.  The increase of $7.0 million,  or 199%,  was primarily
attributable to accruals for satellite  incentives  during 1995,  which were not
applicable  prior to launch in November 1994,  costs  associated  with equipment
sales ($2.5 million in 1995, $0 in 1994), and installation and maintenance costs
in connection  with higher  volumes of customer  sites placed in service  during
1995  ($1.3  million  in 1995,  $0.5  million  in 1994).  These  increases  were
partially  offset  by a  reduction  in  leased  transponder  capacity  costs  as
customers were  transferred  from leased capacity to Orion 1. No equipment sales
occurred during 1994.

   Sales and marketing expenses.  Sales and marketing expenses were $8.6 million
in 1995,  as compared to $5.9  million in 1994,  an increase of $2.7  million or
47%. The increase is due to the hiring of additional sales personnel,  increased
advertising and promotion expenses associated with increased sales and equipment
sales commissions.

   Engineering and technical  expenses.  Engineering and technical expenses were
$8.5 million in 1995,  as compared to $3.0 million for 1994, an increase of $5.5
million or  approximately  184%.  The  increase  is  attributable  to  increased
staffing  requirements  related to control and operation of the  satellite,  and
customer  engineering  functions  in support  of the  expansion  of the  network
services business.

   General and administrative expenses. General and administrative expenses were
$10.1 million for 1995  compared to $5.1 million for 1994.  The increase of $5.0
million or 99% was primarily due to the cost of in-orbit  insurance for Orion 1,
beginning in May 1995, and other costs  associated with Orion's  commencement of
full commercial operations.
                                       128

<PAGE>

   Depreciation  and  amortization.  Depreciation  and  amortization  was  $31.4
million in 1995, an increase of $29.7  million,  as compared to $1.7 million for
1994. The increase  primarily  resulted from the commencement of depreciation of
Orion 1 upon being placed in service January 20, 1995.

   Interest. Interest income was $1.9 million for 1995, compared to $0.4 million
for the prior year.  The increase in interest  income during 1995 is primarily a
result of interest  earned on proceeds from Orion's  initial public  offering in
August 1995. Interest expense, net of capitalized interest, increased from $0.06
million for 1994 to $24.7 million for 1995. The increase in interest  expense in
1995 is  attributable  to  expensing  interest  (including  commitment  fees and
amortization of deferred  financing  costs) from the in-service date of Orion 1.
Prior to that date,  substantially  all interest expense was capitalized as part
of the cost of Orion 1.

   Other.  Other expenses of $3.4 million for the  year-ended  December 31, 1995
are  primarily  related to costs  incurred in connection  with Orion  Atlantic's
plans to raise  financing  for Orion 2, which  plans were  deferred  in November
1995.

   Net loss.  The Company  incurred a net loss of $26.9 million and $8.0 million
for 1995 and 1994,  respectively,  after deduction of the Limited  Partners' and
minority  interests'  share in the  Company's  results  of  operations  of $46.1
million and $7.4 million, respectively.

YEAR ENDED DECEMBER 31, 1994 COMPARED TO YEAR ENDED DECEMBER 31, 1993

   Revenue.  Services  revenue  for the year ended  December  31,  1994 was $3.4
million  compared to $2.0  million for the year ended  December  31,  1993.  The
increased  revenue  reflects  an  increase  in the  number  of  private  network
customers from 12 in 1993 to 18 in 1994.

OPERATING EXPENSES

   Direct  expenses.  Direct  expenses were $3.5 million and $2.6 million in the
years ended December 31, 1994 and 1993, respectively.  Direct expenses increased
$0.9 million or 32% which was primarily  attributable  to the increased  revenue
generated by private network services.

   Sales and marketing expenses.  Sales and marketing expenses were $5.9 million
in the year  ended  December  31,  1994,  as  compared  to $1.9  million in 1993
primarily  due to the Company's  increased  selling  efforts in private  network
services.

   Engineering and technical  expenses.  Engineering and technical expenses were
$3.0 million in the year ended  December  31, 1994,  as compared to $1.8 million
for the year  ended  December  31,  1993.  Engineering  and  technical  services
increased  $1.2 million due to the  increased  support  requirements  of private
network services.

   General and administrative expenses. General and administrative expenses were
$5.1 million for the year ended  December 31, 1994 compared to $4.7 for the year
ended  December 31, 1993.  Orion  Atlantic  entered into  interest  rate hedging
arrangements  which fixed the maximum  interest  rate through  November  1995 at
11.54%. Thereafter, an interest cap agreement is in place relating to a notional
amount  declining  every nine months from $150  million  effective  November 30,
1993. General and administrative expenses increased $0.4 million principally due
to the  increased  staffing  requirements  of the Company's  management  team in
anticipation of higher operating levels.

   Interest.  During the year ended  December 31,  1994,  Orion  incurred  $27.0
million  of  interest  costs  (including  commitment  fees and  amortization  of
deferred  financing costs) compared to $16.3 for the comparable  period in 1993,
substantially  all of  which  was  capitalized.  The  increase  in  interest  is
attributable to additional borrowings related to the construction of Orion 1 and
subordinated borrowings beginning in late 1993 from the Limited Partners to fund
the development of the Orion Atlantic network services business.

   Other.  Other income was $0.05  million in the year ended  December 31, 1994,
compared to expense of $4.9 million for the year ended  December  31, 1993.  The
increase  in other  income is  related to the April  1993  termination  by Orion
Atlantic of its  commitment  to purchase a second  satellite  from Space

                                       129

<PAGE>
Systems (due to a reassessment of the satellite design and target markets) which
resulted  in the  forfeiture  of $5.0  million  which  was  then  expensed  as a
termination charge.

   Net loss.  The Company  incurred  net losses of $8.0 million and $7.9 million
for the years ended December 31, 1994 and 1993,  respectively,  after  deducting
the  Limited  Partners'  and  minority  interests'  share in Orion's  results of
operations of $7.4 million and $7.8 million, respectively.

LIQUIDITY AND CAPITAL RESOURCES

   Funding to date.  Orion has required  significant  capital for  operating and
investing  activities  in  the  development  of  its  business,  and  will  need
significant  additional  capital  in the  future to  develop  fully  its  global
satellite  communications  system.  The  Company's  funding  has  been  provided
primarily by the sale of equity  securities,  including  the  completion  of its
initial public offering in August 1995 which  generated  proceeds to the Company
of approximately $52 million (net of underwriting discounts), bank loans, vendor
financing,  lease  arrangements and short-term  loans from its investors.  As of
September 30, 1996,  Orion had a working capital  deficiency of $5.7 million and
the net cash used in operations for the nine months ended September 30, 1995 and
1996, was $30.4 million and $25.0 million, respectively.

   Funding for the  construction and launch of the Orion 1 satellite and related
facilities  was fully  committed  through $90 million of equity from the limited
partners of Orion  Atlantic,  an  aggregate  of $251  million  under the Orion 1
Credit  Facility  and  approximately  $11 million  under other debt  facilities,
dedicated  primarily to the  construction  of the TT&C facility,  which is being
used to control Orion 1.

   Amounts  outstanding under the Orion 1 Credit Facility bear interest at 1.75%
over the LIBOR rate (7.68% at December  31,  1995).  Orion  Atlantic has entered
into agreements with Chase Manhattan  Bank,(National  Association) ("Chase") for
interest rate hedging arrangements which fixed the maximum interest rate through
November 1995 at 11.54%.  Thereafter a self funding  interest rate cap agreement
is in place relating to a notional  amount  declining every six months from $150
million  effective  November 30, 1995 to $15.6 million effective March 31, 2001.
Under the terms of the cap agreement,  when LIBOR equals or exceeds 5.5%,  Orion
Atlantic  pays  Chase a fee equal to 3.3% per annum of the  notional  amount and
receives a payment from Chase in an amount equal to the  difference  between the
actual LIBOR rate and 5.5% on the notional amount.  There was an unrealized loss
on this cap as of  September  30, 1996 of  approximately  $5.9  million.  On the
closing date of the Notes  Offering,  the Company will pay its then  outstanding
obligation  under  this  facility,  including  costs to break the  interest  cap
agreement.

   In the event of a  deficiency  in cash flow  required  to service the Orion 1
Credit Facility, the Limited Partners of Orion Atlantic,  including the Company,
would be obligated to make additional  payments toward such deficiency under the
terms  of  their  contingent  satellite  capacity  commitment  agreements.  Such
agreements would be terminated as a result of the Exchange.

   Existing  Obligations.  The  following is a description  of Orion's  existing
obligations,  a substantial portion of which are to be paid with the proceeds of
the Notes Offering;  however,  no assurance can be given that the Notes Offering
will be completed.

   Orion  Atlantic  began  repayment  of the term loans under the Orion 1 Credit
Facility  in  1995.   Sales  of  services  to  customers  and  certain  capacity
commitments  of the Limited  Partners  are  expected to provide the cash to meet
Orion Atlantic's loan repayment  obligations.  The Company and the other Limited
Partners of Orion  Atlantic have agreed to lease capacity on Orion 1, subject to
obligations  of Orion  Atlantic under the refund  agreement  (defined  below) to
refund lease  payments,  and have entered into  additional  contingent  capacity
lease  contracts  as  support  for  payment  of the  senior  bank  debt of Orion
Atlantic.  The Company's  obligations  under these firm and contingent  capacity
arrangements are $2.5 million and $4.3 million, respectively, per year for seven
years,  and the Company is obligated to indemnify STET (a former limited partner
whose  partnership  interest in Orion Atlantic was purchased by Orion  Atlantic)
against  certain  payments made by STET under its firm and  contingent  capacity
leases.  This indemnity could increase  Orion's  obligations to make payments in
the event of cash deficits of Orion Atlantic to $8.6 million per year, and could
require  Orion  for a term of four  years  commenc-

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ing in January  1998 to make  payments to Orion  Atlantic of up to approximately
$2.5  million  per year.  The Company  maintains a $10 million  letter of credit
supporting this indemnification obligation.

   Amounts outstanding under the Orion 1 Credit Facility  (approximately  $210.4
million, including interest, as of September 30, 1996) are secured by the assets
of Orion Atlantic,  the partnership  interests of the partners in Orion Atlantic
and the stock of OrionSat,  and are due in graduated  installments through 2002.
Among other customary  covenants and  requirements,  the Orion 1 Credit Facility
includes  significant  restrictions on the  distribution of any funds from Orion
Atlantic to the partners.  Distributions  can only be made if Orion Atlantic has
sufficient revenues to cover operating costs and debt service.  Orion's capacity
commitments  and the Orion 1 Credit  Facility are required to be  refinanced  in
connection  with  the  Exchange.  See "The  Related  Transactions  -- The  Notes
Offering/Orion 1 Credit Facility Refinancing."

   At  September  30,  1996,  the  Company  had   outstanding   indebtedness  of
approximately  $7.2  million  under a seven year term loan  provided  by General
Electric Capital Corporation ("GECC") for the TT&C facility, which is secured by
the  TT&C  facility  and  various  assets  relating  thereto.  Additionally,  at
September 30, 1996,  the Company had  obligations  with a present value of $21.7
million, which are payable to the manufacturer of Orion 1 through 2006 (of which
$13 million will be paid in cash on the Closing Date,  $10 million of which will
be reinvested in the  Debentures),  and $8.0 million payable to a former partner
in Orion Atlantic through 1997. Of this $8.0 million, approximately $3.5 million
(plus  interest of  approximately  $500,000 as of January 30, 1997) will be paid
with proceeds of the Notes Offering. Also at September 30, 1996, the Company had
outstanding  approximately $8.1 million of subordinated debt under a facility of
up to $10.5 million from certain  Limited  Partners  (excluding the Company) for
Orion  Atlantic's  network  services.  See  Note  5  to  Consolidated  Financial
Statements for additional  discussion of Orion's  long-term debt.  Orion will be
acquiring the Limited Partners' interests in such obligations in the Exchange.

   Current Funding  Requirements.  The Company will need a substantial amount of
capital over the next three years (and possibly thereafter) to fund the costs of
Orion 2 and Orion 3, the purchase of VSATs and other capital expenditures and to
make various  other  payments,  such as principal  and  interest  payments  with
respect  to the TT&C  Financing,  the Notes  and any  indebtedness  incurred  to
finance Orion 2 or Orion 3. The Company's cash flows will be inadequate to cover
its cash needs and the Company will seek  financing  from outside  sources.  The
Company  does not have a revolving  credit  facility or other  source of readily
available  capital.  Sources of additional capital may include public or private
debt or equity  financings.  The  Company is often  involved in  discussions  or
negotiations  with  respect to such  potential  financings  and,  because of its
substantial  capital  needs,  may consummate any such financing at any time. The
Company  has  commenced   construction  of  Orion  3  and  intends  to  commence
construction  of Orion 2 immediately  after  consummation of the Notes Offering,
despite the fact that it does not have any commitment from any outside source to
provide  such  financing.  If the  Company  is unable to obtain  financing  from
outside  sources  in the  amounts  and at the  times  needed,  it could  forfeit
payments made on Orion 2 and Orion 3 and its rights to Orion 2 and Orion 3 under
the Orion 2 Satellite Contract and Orion 3 Satellite Contract and there would be
a material adverse effect on the Company's ability to make payments on the Notes
and the value of the Orion Newco Common Stock.

   Expected  payments  prior to launch under the Orion 2 Satellite  Contract and
Orion 3  Satellite  Contract  and for launch  insurance  for Orion 2 and Orion 3
aggregate  approximately $500 million. In addition to the $3 million paid in the
fourth quarter of 1996,  Orion will need to make payments of  approximately  $90
million,  $360  million  and $50 million in 1997,  1998 and 1999,  respectively.
These  amounts  include  the  Company's  estimate  regarding  the cost of launch
insurance (but not in-orbit  insurance,  which the Company  presently  estimates
will cost  approximately  $5  million to $6  million  per annum per  satellite),
although the Company has not had material  discussions  with potential  insurers
and has not received any commitment to provide  insurance.  The Company's actual
payments  could  be  substantially  higher  due to any  change  orders  for  the
satellites,  insurance rates, delays and other factors. In addition, the Company
expects to expend  approximately  $22  million,  $30  million and $34 million on
VSATs and other capital expenditures in 1997, 1998 and 1999,  respectively.  The
Company  believes  these VSAT and

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other  capital  expenditures  can be financed  through  capital  leases or other
secured financing arrangements. However, the Company has not engaged in material
discussions  with  potential  lenders  and there can be no  assurance  that such
financing can be obtained.

   Under the Orion 1 Satellite  Contract,  the contractor is entitled to receive
incentive  payments  based  upon  the  performance  of Orion 1 in  orbit.  These
incentive payments could reach an aggregate of approximately $44 million through
2007,  if the  transponders  on Orion 1 continue to operate in  accordance  with
specification   during  that  period.  As  of  September  30,  1996,  Orion  had
obligations with a present value of approximately  $21.7 million with respect to
incentive payments. Orion will pay $13 million in satellite incentives following
completion  of the Notes  Offering of which $10 million will be  re-invested  in
Debentures of Orion Newco in the Matra Marconi Investment.

   The  foregoing  estimates  do not  include  any  amounts  for other  possible
financing  requirements.  The  Company  may from time to time  enter  into joint
ventures and make acquisitions of complimentary  businesses and is often engaged
in discussions or negotiations  with regard to such potential joint ventures and
acquisitions.  Such joint  ventures or  acquisitions  would need to be financed,
which would  increase the Company's need for  additional  capital.  In addition,
Orion intends to replace  Orion 1 at the end of its useful life  (expected to be
in October 2005). Such replacement likely will require  additional  financing if
the cash flow from Orion's  operations  is not  sufficient to fund a replacement
satellite.  See "Risk Factors -- Risks Relating to Orion's  Business  --Need for
Substantial  Additional  Capital" and " -- Launch of Orion 2 and Orion 3 Subject
to Significant  Uncertainties -- Substantial  Financing  Requirements;  Risks of
Commencing Construction Prior to Completing Financing."

   As of September 30, 1996, after giving pro forma effect to the  Transactions,
Orion would have had approximately $426 million of long-term  indebtedness.  The
accretion of original issue discount,  if any, on the Senior Discount Notes will
increase  the  amount of  Orion's  indebtedness.  As  indicated  above,  Orion's
financing plan requires a total of $480 million of additional financing to fully
fund  the  construction,  launch  and  insurance  of  Orion  2 and  Orion  3 and
associated  financing and start-up  costs,  and Orion  presently  expects that a
significant  portion  of  such  additional  financing  will  be in the  form  of
additional  indebtedness.  Such additional  indebtedness  would increase Orion's
long-term indebtedness.  See "Risk Factors -- Risks Relating to Orion's Business
- --Substantial Leverage; Secured Indebtedness." 

   The level of the Company's  indebtedness could have important consequences to
its  stockholders,  including the  following:  (i) the ability of the Company to
obtain  any  necessary  financing  in the future for  working  capital,  capital
expenditures, debt service requirements or other purposes may be limited; (ii) a
substantial portion of the Company's cash flow from operations,  if any, must be
dedicated to the payment of principal  of and interest on its  indebtedness  and
other  obligations  and will not be  available  for  other  purposes;  (iii) the
Company's level of indebtedness  could limit its flexibility in planning for, or
reacting  to changes  in, its  business;  (iv) the  Company  will be more highly
leveraged  than some of its  competitors,  which  may place it at a  competitive
disadvantage;  and (v) the Company's  high degree of  indebtedness  will make it
more  vulnerable to a default and the  consequences  thereof (such as bankruptcy
workout) in the event of a downturn in its business.

   Because of its substantial needs for additional financing,  Orion may attempt
to raise  additional  funds  substantially  earlier  than the date it needs such
funds,  depending on the  conditions of the capital  markets from  time-to-time,
including  during 1997.  If the Merger and the Exchange are  consummated,  Orion
will be entitled to incur additional  indebtedness at any time,  including prior
to the date such funds are needed,  without  obtaining  any further  stockholder
approval. If Orion raises such funds prior to the date such funds are needed, it
will (in addition to the risks and costs  associated  with  increased  leverage)
incur substantial  interest cost for periods when such funds are not deployed in
its business.

TAXES

   As of December 31,  1995,  Orion had net  operating  loss  carryforwards  for
federal tax purposes of  approximately  $51.2  million.  The ability of Orion to
benefit from net operating losses for federal income tax purposes will depend on
a number of factors, including whether Orion has sufficient income from which to
deduct  the  losses,  limitations  that may arise as a result of  changes in the
ownership of Orion, 

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including as a result of the Transactions  and other factors,  and certain other
limitations which may significantly  reduce the economic benefit of those losses
to Orion.  Due to  uncertainty  regarding its ability to realize the benefits of
such net operating loss  carryforwards,  the Company has established a valuation
allowance  for the full  amount  of its net  operating  loss  carryforwards.  Of
Orion's net operating losses,  approximately $31.2 million was incurred by Orion
Atlantic and allocated to Orion.  Orion  Atlantic is structured as a partnership
for U.S.  income tax purposes.  As a result,  Orion  Atlantic  itself  generally
should not be subject to federal income taxation. Instead, the Partners of Orion
Atlantic,  including Orion and OrionSat,  will separately report their allocable
shares of Orion Atlantic's net income, loss, gain,  deductions,  and credits, as
determined under the allocation provisions of the Partnership  Agreement.  Orion
Atlantic  may,  however,  be subject to income tax on a portion of its income in
certain  states  and  other  countries  in which it has  operations.  Under  the
Partnership  Agreement,  the first $20  million of any losses was  allocated  to
OrionSat,  and any losses in excess of that amount generally have been allocated
to the Partners, including Orion and OrionSat, in proportion to their respective
percentage  interests.  Subsequent to consummation  of the Exchange,  all losses
will be allocated to Orion.

EFFECT OF INFLATION

   Orion believes that inflation has not had a material effect on the results of
operations to date.

EFFECT OF RECENTLY ISSUED FINANCIAL ACCOUNTING STANDARDS

   In  March  1995,  the FASB  issued  Statement  No.  121,  Accounting  for the
Impairment of  Long-Lived  Assets and for  Long-Lived  Assets to be Disposed Of,
which  requires  impairment  losses to be recorded on long-lived  assets used in
operations when indicators of impairment are present and the  undiscounted  cash
flows  estimated  to be  generated  by those  assets  are less than the  assets'
carrying amount.  Statement No. 121 also addresses the accounting for long-lived
assets that are expected to be disposed of. Orion  adopted  Statement No. 121 in
the first  quarter  of 1996.  The effect of  adoption  was not  material  to its
financial condition or results of operations.

   In October  1995,  the FASB issued  Statement No. 123,  Accounting  for Stock
Based  Compensation,  which is effective for awards after January 1, 1996. Orion
has elected to continue to follow  Accounting  Principles  Board Opinion No. 25,
"Accounting for Stock Issued to Employees" (APB 25) and related  Interpretations
in  accounting  for  its  employee  stock  based  award  programs,  because  the
alternative  fair value  accounting  provided for under FASB  Statement  No. 123
requires  use of option  valuation  models  that were not  developed  for use in
valuing  employee  stock  options.  Under APB 25, when the exercise price of the
employee  award equals the market price of the  underlying  stock on the date of
grant, as has been the case  historically  with Orion's awards,  no compensation
expense is recognized.

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<PAGE>
            PRICE RANGE OF ORION COMMON STOCK AND DIVIDEND POLICY

   Since completion of Orion's initial public offering in August 1995, the Orion
Common  Stock has been quoted on the Nasdaq  National  Market  under the trading
symbol  "ONSI."  As  of  December  15,  1996,  there  were   approximately   350
stockholders of record of Orion Common Stock. The following table summarizes the
high and low closing sale prices of the Orion Common Stock by fiscal quarter for
1995, 1996 and 1997 as reported on the Nasdaq National Market.

               QUARTER ENDED:                             1995  
     -------------------------------------             ------------  
                                                   
     August 1 through September 30 .......         $10 3/4 to $14 1/4       
     December 3 ..........................          16 3/4 to  12  

       QUARTER ENDED:                                     1996  
     ------------------------------------           ------------------  
                                                                        
     March 31 ...........................          $ 8 1/4 to $14 3/4  
                                                                        
     June 30 ............................           10 1/4 to  14 1/4    
                                                                        
     September 30 .......................            7 1/4 to  12 1/8     
                                                                        
     December 31 ........................            9 1/2 to  12 7/8     
     

       QUARTER ENDED:                                        1997      
- ---------------------------                              -----------   
March 31 (through January 14).............         $12 1/2 to $15

   On December 13, 1996, the date preceding  public  announcement  of the Merger
Transactions,  the last  reported  sale  price of the  Orion  Common  Stock,  as
reported on the Nasdaq National Market, was $12 5/8 .

   Orion has never paid any cash  dividends  on the Orion  Common  Stock and the
Board of Directors of Orion currently does not anticipate  paying cash dividends
in the  foreseeable  future on shares of Orion  Common  Stock.  The terms of the
Orion 1 Credit Facility,  which regulate cash  distributions to Orion Atlantic's
partners, including Orion, and agreements relating to the Orion Senior Preferred
Stock limit Orion's ability to pay cash dividends on the Orion Common Stock. The
Notes  Indentures are expected to contain  covenants  restricting the payment of
cash  dividends  by Orion Newco for the  foreseeable  future.  See "The  Related
Transactions -- The Notes  Offering/Orion 1 Credit Facility Refinancing -- Notes
Offering." 

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<PAGE>
                             CERTAIN TRANSACTIONS

   The following is a summary of certain  transactions  among Orion,  directors,
officers and certain stockholders of Orion, and related persons.  Orion believes
that each of such  transactions  was on terms no less  favorable  to Orion  than
reasonably   could  have  been  obtained  in  arm's-length   transactions   with
independent  third  parties.  Orion  has a policy  requiring  that any  material
transactions  between Orion and persons or entities  affiliated  with  officers,
directors or principal  stockholders  of Orion be on terms no less  favorable to
Orion than  reasonably  could be  obtained  in  arm's-length  transactions  with
independent third parties. Orion's policy is to conduct an appropriate review of
all related party  transactions  and to have the Audit Committee or a comparable
body review potential conflict of interest situations.

   Orion is a party to numerous agreements with one or more Exchanging Partners,
most of which were  entered into in December  1991,  including  the  partnership
agreement of Orion Atlantic,  firm and contingent capacity leases (most of which
will be  terminated  in  connection  with the  Exchange),  the Orion 1 Satellite
Contract, the Orion 2 Satellite Contract, agreements with STET or its affiliates
concerning the TT&C facility,  representative agent agreements and agreements to
make  loans  or  advances  to Orion  (which  will be  terminated  as part of the
Exchange).  See "The Merger,  the Exchange and the Debenture  Investments -- The
Exchange Agreement."

   Orion entered into the Orion 1 Satellite Contract with British Aerospace,  an
affiliate of a principal  stockholder of Orion and of which Mr. Rice, a director
of  Orion,  is a Group  Treasurer.  Under  the  terms of the  Orion 1  Satellite
Contract,  Orion has paid an aggregate of $43.4 million in 1991,  $72 million in
1992 (plus a $5 million  payment upon  termination for convenience by Orion of a
second  satellite),  $26 million in 1993, $89.8 million in 1994 and $0.3 million
in 1995. As of September 30, 1996, Orion Atlantic had obligations of $15 million
to Matra  Marconi  Space with  respect to incentive  payments  under the Orion 1
Satellite Contract, of which $13 million will be paid on the closing date of the
Exchange.  Of this  amount,  $10 million will be  re-invested  in Orion by Matra
Marconi Space in the Matra Marconi Investment. See "The Merger, the Exchange and
the  Debenture  Investments  -- The Debenture  Investments."  The balance of the
outstanding   obligations  are  payable  18  months  following  commencement  of
construction under the Orion 2 Satellite Contract, and subsequent payments of up
to  $29.4  million  may  become  payable  thereafter,   depending  on  satellite
performance.  See "Management's  Discussion and Analysis of Financial  Condition
and Results of Operations of Orion -- Liquidity and Capital Resources."

   Orion has engaged certain  Exchanging  Partners as representative  agents for
sales and ground  operations.  A joint venture  between two Exchanging  Partners
(Kingston  Communications  and British  Aerospace) serves as a ground operations
representative  in the United Kingdom,  and the affiliate of another  Exchanging
Partner (Matra Hachette) serves as a ground operations representative in France.
Orion expects to pay these  Exchanging  Partners an aggregate of $1.6 million in
1996 as commissions and other fees (including for ground  operations and, in the
case of the Kingston  Communications/British  Aerospace joint venture, satellite
capacity,  equipment  leasing  and other  charges),  and paid  these  Exchanging
Partners $1.9 million in 1995 and $1.9 million in 1994 for these  services.  See
"Information  About  Orion's  Business -- Sales and  Marketing"  and "-- Network
Operations; Local Ground Operators."

   In December  1991,  Orion  issued  259,515  shares of Orion Common Stock at a
value  of  $11.56  per  share  to  British  Aerospace  Space  Systems,  Inc.  in
consideration of British Aerospace Space Systems,  Inc.'s agreement to guarantee
Orion's  obligations  under  a $10  million  letter  of  credit  (see  Note 4 to
Consolidated Financial Statements).  The shares were reconveyed to Orion and are
held in  treasury  at a value of $0.  The shares are  pledged  as  security  for
British  Aerospace  Space  Systems,  Inc.  in the event it is  required  to fund
amounts  under its  guarantee  and Orion does not provide  reimbursement.  These
arrangements will be terminated upon the closing of the Transactions.

   In December 1993, Orion issued an aggregate of 178,097 shares of Orion Common
Stock as part of a private  placement  of Orion  Common  Stock to certain of its
directors and  affiliates of those  directors at a purchase  price of $10.20 per
share. The terms of such issuance permitted the purchas- 

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ers to  receive  the  benefit of any lower  price at which  Orion  Common  Stock
subsequently was issued in a private  placement or to receive any other security
subsequently  issued in a private  placement.  In June 1994,  when Orion  issued
shares of Orion  Common  Stock as part of a private  placement  of Orion  Common
Stock to a limited number of institutions and other investors  (including 64,705
shares to affiliates of Directors) at a purchase price of $8.50 per share, Orion
issued  100,326  additional  shares to the Directors and affiliates of Directors
who  purchased  Orion Common Stock in December  1993.  In addition,  after Orion
issued Orion Series A Preferred  Stock (along with  warrants and options to make
an additional investment) to CIBC, Fleet and Chisholm (each as defined below) in
June 1994, the Directors and affiliates of Directors who purchased  Orion Common
Stock in December  1993 each  exercised  their right to receive  Orion  Series A
Preferred  Stock  (along  with  warrants  and  options  to  make  an  additional
investment)  in exchange  for the Orion Common Stock  previously  acquired,  and
Orion  issued an aggregate of  $3,000,000  of Orion Series A Preferred  Stock to
such persons and entities.

   In April 1994,  Orion  entered  into an  agreement  with Space  Systems/Loral
("SS/L")  whereby SS/L agreed to purchase  588,235  shares of Orion Common Stock
for an aggregate purchase price of $5,000,000.

   In June  1994,  CIBC  Wood  Gundy  Ventures,  Inc.  ("CIBC"),  Fleet  Venture
Resources, Inc. ("Fleet") and Chisholm Partners, II, L.P. ("Chisholm") purchased
$11.5 million in Orion Series A Preferred  Stock. For a description of the Orion
Series A Preferred  Stock,  see  "Description  of Orion Newco  Capital  Stock --
Preferred  Stock." In connection with the transaction,  CIBC and Fleet each were
granted  the right to elect one  member of  Orion's  Board of  Directors.  These
rights terminated as a result of the Company's initial public offering.

   In June 1994,  CIBC, Inc. (an affiliate of CIBC) became a $25,000,000  lender
under the Orion 1 Credit Facility.

   In June 1995, CIBC,  Fleet and certain  Directors and affiliates of Directors
who  purchased   Orion  Series  A  Preferred   Stock  in  June  1994   purchased
approximately  $4.2 million of Orion Series B Preferred Stock. This purchase was
pursuant to an option granted in June 1994.  The Orion Series B Preferred  Stock
has rights,  designations and preferences  substantially similar to those of the
Orion Series A Preferred Stock, and is subject to similar covenants, except that
the Orion Series B Preferred Stock is convertible  into Orion Common Stock at an
initial price of $10.20 per share, subject to certain anti-dilution adjustments.
For a description of the Orion Series B Preferred  Stock,  See  "Description  of
Orion Newco Capital Stock -- Orion Newco Preferred Stock.

   In November 1995, Orion Atlantic  redeemed the limited  partnership  interest
previously  held by STET for an aggregate of  approximately  $11.5  million (the
"STET Redemption"),  including $3.5 million in cash and $8 million in promissory
notes,  $3.5 million (plus accrued interest of approximately  $400,000) of which
will  be  paid  on the  closing  date  of the  Exchange.  As  part  of the  STET
Redemption,  Telecom Italia, a subsidiary of STET, entered into a representative
agreement and distributor arrangement with Orion providing for sales, marketing,
customer support and ground operations  services in Italy. Orion Atlantic funded
the STET Redemption by selling a new limited  partnership  interest to Orion for
$8 million (including $3.5 million in cash and $4.5 million in promissory notes)
$3.5 million (plus accrued interest of approximately  $400,000) of which will be
paid on the closing  date of the  Exchange).  Orion  Atlantic  also entered into
amendments  to existing  contracts  with STET that were  expected to result in a
cash  savings  by the  Company of  approximately  $3.5  million  over a ten-year
period.  In  connection  with the STET  Redemption,  Orion  agreed to  indemnify
Telecom  Italia for payments  which would be made under its firm and  contingent
capacity agreements with Orion Atlantic.  Such indemnity will be discontinued on
the closing date of the Exchange. 

   In July 1996,  Matra Marconi Space,  the parent company of MMS Space Systems,
the prime  contractor  for Orion 1, entered into the Orion 2 Satellite  Contract
with Orion  regarding  construction  of Orion 2, which  contract  was amended in
December  1996.  Certain  terms of the Orion 2 Satellite  Contract are described
above under the caption "Information About Orion's Business -- Implementation of
the  Orion  Satellite  System -- Orion 2."  Matra  Hachette,  one of the  parent
companies of Matra Marconi

                                       136

<PAGE>
Space,  will be a more than 5% beneficial  owner of Orion Common Stock after the
Exchange  and the  Merger.  See "The  Merger,  the  Exchange  and the  Debenture
Investments."

   Effective  June 1996,  Orion and the  Exchanging  Partners  entered  into the
Exchange  Agreement.  In December 1996 and January 1997, the Exchanging Partners
agreed to extend to April 30, 1997 the  termination  date for the Exchange.  See
"The  Merger,  the  Exchange  and  the  Debenture  Investments  -- The  Exchange
Agreement."

   Effective January 13, 1997, Orion,  Orion Newco and each of British Aerospace
and Matra Marconi Space entered into the Debenture  Agreement.  The net proceeds
of the  Debenture  Investments,  which  will occur  concurrently  with the Notes
Offering,  are estimated to be approximately $59 million.  Such net proceeds are
expected to be used for initial payments to the manufacturers  under the Orion 2
Satellite Contract.

                          FORWARD-LOOKING STATEMENTS

   Information set forth in this Proxy  Statement/Prospectus  under the captions
"Risk Factors," "Management's Discussion and Analysis of Financial Condition and
Results  of  Operations  of Orion"  and  "Selected  Consolidated  Financial  and
Operationa   Data  of  Orion"  and  under  other   captions   contains   various
"forward-looking statements" within the meaning of Section 27A of the Securities
Act and Section 21E of the  Exchange  Act.  Such  statements  represent  Orion's
reasonable  judgment  concerning  the  future  and  are  subject  to  risks  and
uncertainties  that could cause Orion's actual  operating  results and financial
position  to differ  materially.  Such  forward-looking  statements  include the
following:  Orion's belief that the Merger Transactions will enhance the ability
of the Company to raise  additional  financing;  Orion's belief that a change in
the  operational  structure of Orion  Atlantic  would reduce  certain  potential
conflicts of interest and operating concerns that may be inherent in the current
partnership  structure of Orion  Atlantic;  Orion's  projections  regarding  the
continuation of operating losses and net cash flow deficits;  Orion's belief and
the  judgments  of  its  independent  engineering  consultant,  Telesat  Canada,
regarding  the  expected  performance  of the Orion 1 satellite  over its useful
life,  and  the  effect  of  such  performance  on  Orion's  business;   Orion's
expectations  regarding  the period for  construction  and launch of Orion 2 and
Orion 3; Orion's belief that it can overcome  uncertainties  relating to Orion 2
and Orion 3; Orion's  expectations  regarding  receipt of regulatory  approvals,
coordination  of orbital slots and avoidance of possible  interference;  Orion's
beliefs regarding  existing and future regulatory  requirements,  its ability to
comply  with  such  requirements  and the  effect  of such  requirements  on its
business; Orion's beliefs regarding the competitive advantages of satellites and
of Orion's  satellites,  strategies and services in particular,  both in general
and as compared to other  providers  of services or  transmission  capacity  and
other services presently offered or which may be offered in the future;  Orion's
expectations  regarding  the  growth in  telecommunications  and the  demand for
telecommunications  services;  Orion's  beliefs  regarding  the  demand  for  or
attractiveness  of Orion's  services;  Orion's beliefs  regarding  technological
advances and their  effect on  telecommunications  services or demand  therefor;
Orion's  beliefs  regarding  availability  of net operating loss  carryforwards;
Orion's beliefs regarding its representatives  and distributors;  Orion's belief
regarding  transactions  or  existing  management  structures  being in the best
interests of Orion and its  stockholders;  the  description  of the Merger,  the
Exchange and the Debenture Investments under the caption "Certain  Transactions"
as being on terms no less  favorable  to Orion than  reasonably  could have been
obtained in arm's-length  transactions with independent  third parties;  Orion's
intention  not to pay any  cash  dividends  on the  Orion  Common  Stock  in the
foreseeable future;  Orion's belief that any liability that might be incurred by
Orion upon the resolution of certain  existing or future legal  proceedings  not
having a material  adverse  effect on the  consolidated  financial  condition or
results of operations of Orion; and the adoption of new accounting  releases not
being material to its financial condition or results of operations.

   Orion cautions that the above  statements are further  qualified by important
factors that could cause Orion's actual results to differ  materially from those
in the  forward-looking  statements.  Such factors include,  without limitation,
those set forth in this Proxy  Statement/Prospectus under "Risk Factors" and the
following:  the Merger, the Exchange and the Debenture Investments are dependent
on the Orion 1 Credit Facility  Refinancing and the Debenture  Investments,  and
there being no assurance that these 

                                       137

<PAGE>

financings  or the Merger,  the Exchange and the  Debenture  Investments  can be
consummated;  the  terms of  financings  not  being  known  and  there  being no
assurance  that such  terms will not be  unfavorable  to Orion;  there  being no
assurance that Orion will obtain all necessary approvals or waivers to implement
the Merger, the Exchange and the Debenture Investments,  or regarding the effect
of failure to obtain such  approvals or waivers;  there being no assurance as to
the effect of  issuance  of Orion  Newco  Series C Stock on the market for Orion
Newco Common Stock; no assurances  regarding the business plan;  Orion's history
of losses and expectation of future losses; the substantial  financial risks and
financing  requirements;  substantial  leverage and limits on Orion's ability to
raise additional funds; risks of satellite loss or reduced  performance;  launch
of  Orion 2 and  Orion 3  being  subject  to  significant  uncertainties;  risks
relating to Orion's business plan; potential adverse effects of competition;  no
assurances  regarding  approvals  needed or current or future  regulation of the
telecommunications  industry;  no assurances  regarding  technological  changes;
risks  of  conducting  international  business;   dependence  of  Orion  on  key
personnel;  control of Orion Newco by principal stockholders;  risks relating to
senior preferred  stock;  limits on paying cash dividends on Orion Common Stock;
and anti-takeover and other provisions of the certificate of incorporation.  See
"Risk Factors."

                                OTHER MATTERS

   The Board of  Directors  of Orion  does not know of any  matter to be brought
before the  Special  Meeting  other than as  described  in the Notice of Special
Meeting accompanying this Proxy Statement/Prospectus.  If any other matter comes
before the Special  Meeting,  it is the  intention  of the persons  named in the
accompanying proxy to vote the proxy in accordance with their best judgment with
respect to such other matter.

                                LEGAL MATTERS

   Certain  legal  matters  with  respect  to the  Merger  Transactions  and the
securities offered hereby will be passed upon for Orion and Orion Newco by Hogan
& Hartson L.L.P., Washington, D.C. 

                                   EXPERTS

   The  consolidated  financial  statements  of Orion Network  Systems,  Inc. at
December 31, 1995 and 1994,  and for each of the three years in the period ended
December 31, 1995,  included in the Proxy  Statement of Orion  Network  Systems,
Inc.,  which is referred to and made a part of this Prospectus and  Registration
Statement,  have been audited by Ernst & Young LLP, independent auditors, as set
forth in their report thereon appearing  elsewhere  herein,  and are included in
reliance  upon such report  given upon the  authority of such firm as experts in
accounting and auditing 

                                       138

<PAGE>
                  INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

                                                                        PAGE
                                                                     ---------
Report of Independent Auditors ......................................   F-2
Consolidated Financial Statements
 Consolidated Balance Sheets ........................................   F-3
 Consolidated Statements of Operations ..............................   F-4
 Consolidated Statements of Changes in Stockholders' Equity........   F-5
 Consolidated Statements of Cash Flows ..............................   F-6
 Notes to Consolidated Financial Statements .........................   F-7


                                       F-1

<PAGE>
                        REPORT OF INDEPENDENT AUDITORS

The Board of Directors
Orion Network Systems, Inc.

   We have audited the accompanying consolidated balance sheets of Orion Network
Systems,  Inc. as of December  31, 1995 and 1994,  and the related  consolidated
statements of operations,  changes in stockholders'  equity,  and cash flows for
each of the three years in the period ended December 31, 1995.  These  financial
statements   are  the   responsibility   of  the   Company's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

   We  conducted  our audits in  accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance about whether the  consolidated  financial  statements are
free of material  misstatement.  An audit includes  examining,  on a test basis,
evidence supporting the amounts and disclosures in the financial statements.  An
audit also includes  assessing the accounting  principles  used and  significant
estimates  made by  management,  as well as  evaluating  the  overall  financial
statement  presentation.  We believe that our audits provide a reasonable  basis
for our opinion.

   In our opinion, the financial statements referred to above present fairly, in
all material  respects,  the  consolidated  financial  position of Orion Network
Systems, Inc. at December 31, 1995 and 1994, and the consolidated results of its
operations  and its cash flows for each of the three  years in the period  ended
December 31, 1995, in conformity with generally accepted accounting principles.

                                                               ERNST & YOUNG LLP

Washington, DC
February 9, 1996

                                       F-2
<PAGE>

                         ORION NETWORK SYSTEMS, INC.
                         CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                         DECEMBER 31,            SEPTEMBER 30,
                                                                               ------------------------------- ----------------
                                                                                     1994            1995            1996
                                                                               --------------- --------------- ----------------
                                                                                                                  (UNAUDITED)
<S>                                                                            <C>             <C>             <C>
ASSETS (NOTE 3)
Current assets:
 Cash and cash equivalents                                                     $11,218,831     $55,111,585     $36,656,619
 Accounts receivable (less allowance for doubtful accounts $278,000 at
  December 31, 1995 and $328,000 at September 30, 1996)                            551,870       5,189,598       5,808,568
 Notes receivable and accrued interest                                                  --         129,810         157,125
 Prepaid expenses and other current assets                                         150,276       3,168,058       5,584,196
                                                                              --------------- --------------- ----------------
Total current assets                                                            11,920,977      63,599,051      48,206,508
Property and equipment, at cost:
 Land                                                                               73,911          73,911          73,911
  Telecommunications equipment                                                   4,231,380      13,836,841      22,707,786
  Furniture and computer equipment                                               1,833,169       3,395,799       4,598,505
  Satellite and related equipment                                              303,486,227     321,918,549     322,450,415
                                                                              --------------- --------------- ----------------
                                                                               309,624,687     339,225,100     349,830,617
  Less: accumulated depreciation                                                (1,628,958)    (32,170,865)    (57,914,578)
                                                                              --------------- --------------- ----------------
Net property and equipment                                                     307,995,729     307,054,235     291,916,039
 Deferred financing costs, net                                                  15,551,956      12,894,720      11,208,678
 Other assets, net                                                               4,706,876       5,527,221       4,645,948
                                                                              --------------- --------------- ----------------
 Total assets                                                                 $340,175,538    $389,075,227    $355,977,173
                                                                              =============== =============== ================
 LIABILITIES AND STOCKHOLDERS' EQUITY
 Current liabilities:
 Accounts payable                                                              $1,154,344     $ 10,454,723       $4,094,026
  Accrued liabilities                                                           5,522,220        6,812,223        7,374,884
  Other current liabilities                                                            --        2,111,687        5,402,117
  Interest payable                                                              7,734,764        8,005,079        3,128,365
  Current portion of long-term debt (Note 5)                                   12,015,663       28,607,110       33,873,930
                                                                              --------------- --------------- ----------------
Total current liabilities                                                      26,426,991       55,990,822       53,873,322
 Long-term debt (Note 5)                                                      230,175,483      250,669,286      221,781,393
 Other liabilities                                                              3,091,074       20,698,084       32,878,061
 Limited Partners' interest in Orion Atlantic (Notes 1 and 3)                  62,519,087       14,626,338       19,961,032
 Minority interest in other consolidated entities                                  57,639           52,354           52,984
 Commitments and contingencies (Note 4)
 Series A 8% Cumulative Redeemable  Convertible Preferred Stock,
 $.01 par value; 15,000 shares authorized; 13,871, 14,491 and 14,500
   shares issued and outstanding at September 30, 1996 and December 31,
   1995 and 1994, respectively, plus accrued dividends (Note 6)                14,554,693       15,705,054       15,820,460
 Series B 8% Cumulative Redeemable  Convertible Preferred Stock, 
 $.01 par value; 5,000 shares authorized; 4,298 and 4,483 shares issued 
   and outstanding at September 30, 1996 and December 31, 1995, plus 
   accrued dividends (Note 6)                                                         --        4,652,647         4,718,526
 Stockholders' equity (Notes 4 and 6):
   Common stock, $.01 par value; 40,000,000 shares authorized; 11,232,533,
   11,115,965 and 7,045,523 issued, 10,973,018, 10,856,450 and 6,786,008
   outstanding at September 30, 1996 and December 31, 1995 and 1994,
   respectively, less 259,515 held as treasury shares (at no cost)                 70,455         111,160           112,325
  Capital in excess of par value                                               33,952,062      85,485,613        86,508,773
  Accumulated deficit                                                         (30,671,946)    (58,916,131)      (79,729,703)
                                                                              --------------- --------------- ----------------
Total stockholders' equity                                                      3,350,571      26,680,642         6,891,395
                                                                              --------------- --------------- ----------------
 Total liabilities and stockholders' equity                                  $340,175,538    $389,075,227      $355,977,173
                                                                              =============== =============== ================
</TABLE>


               See notes to consolidated financial statements.

                                       F-3
<PAGE>
                         ORION NETWORK SYSTEMS, INC.
                    CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                                                     NINE MONTHS ENDED
                                                         YEAR ENDED DECEMBER 31,                       SEPTEMBER 30,
                                             ----------------------------------------------- --------------------------------
                                                   1993            1994            1995            1995            1996
                                             --------------- --------------- --------------- --------------- ----------------
                                                                                               (UNAUDITED)      (UNAUDITED)
<S>                                          <C>             <C>             <C>             <C>             <C>
Services revenue ..........................  $  2,006,021    $  3,415,053    $ 22,283,882    $ 13,947,425    $ 30,015,517
Operating expenses: .......................

 Direct                                         2,648,306       3,503,037      10,485,745      10,019,683       4,285,834
 Sales and marketing ......................     1,920,578       5,863,823       8,613,399       5,914,332       7,792,666
 Engineering and technical services........     1,775,261       3,004,144       8,539,644       6,021,853       6,333,525
 General and administrative................     4,731,322       5,058,201      10,072,429       7,168,165      11,469,235
 Depreciation and amortization.............     1,752,103       1,716,019      31,403,376      22,276,632      26,402,947
                                             --------------- --------------- --------------- --------------- ----------------
  Total operating expenses.................    12,827,570      19,145,224      69,114,593      51,400,665      56,284,207
                                             --------------- --------------- --------------- --------------- ----------------
Loss from operations.......................   (10,821,549)    (15,730,171)    (46,830,711)    (37,453,240)    (26,268,690)
Other expense (income):
 Interest income...........................      (181,707)       (413,435)     (1,924,822)     (1,078,347)     (1,841,868)
 Interest expense..........................       132,869          60,559      24,738,446      17,080,146      20,228,519
 Other.....................................     4,949,722         (54,737)      3,359,853         (43,216)        (48,356)
                                             --------------- --------------- --------------- --------------- ----------------

  Total other expense (income).............     4,900,884        (407,613)     26,173,477      15,958,583      18,338,295
                                             --------------- --------------- --------------- --------------- ----------------
Loss before minority interest..............   (15,722,433)    (15,322,558)    (73,004,188)    (53,411,823)    (44,606,985)
Limited Partners' and minority interest in
 the net loss of Orion Atlantic and other
 consolidated entities ....................     7,836,362       7,357,640      46,089,010      33,426,738      24,799,698
                                             --------------- --------------- --------------- --------------- ----------------
Net loss...................................    (7,886,071)     (7,964,918)    (26,915,178)    (19,985,085)    (19,807,287)
Preferred stock dividend ..................            --         626,400       1,329,007         959,646       1,006,285
                                             --------------- --------------- --------------- --------------- ----------------
Net loss attributable to common
 stockholders..............................  $ (7,886,071)   $ (8,591,318)   $(28,244,185)   $(20,944,731)   $(20,813,572)
                                             =============== =============== =============== =============== ================
Net loss per common share..................  $      (0.85)   $      (0.86)   $      (3.07)   $      (2.42)   $      (1.90)
                                             =============== =============== =============== =============== ================
Weighted average common shares
 outstanding...............................     9,266,445       9,272,166       9,103,505       8,522,067      10,943,287
                                             =============== =============== =============== =============== ================

</TABLE>

               See notes to consolidated financial statements.

                               F-4

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
          CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                      COMMON STOCK
                                               -------------------------
                                                                           CAPITAL IN         TOTAL            TOTAL
                                                 NUMBER OF                  EXCESS OF      ACCUMULATED     STOCKHOLDERS|AL
                                                   SHARES       AMOUNT      PAR VALUE        DEFICIT          EQUITY
                                               ------------- ----------- -------------- ---------------- ----------------
<S>                                            <C>           <C>         <C>            <C>              <C>
Balance at December 31, 1992.................   6,405,732    $ 64,057    $28,608,812    $(14,194,557)    $ 14,478,312
 Issuance of common stock (Note 6)...........     178,097       1,781      1,804,564              --        1,806,345
 Exercise of stock options...................         165           2            998              --            1,000
 Net loss for 1993...........................         --           --             --      (7,886,071)      (7,886,071)
                                               ------------- ----------- -------------- ---------------- ----------------
Balance at December 31, 1993.................   6,583,994      65,840     30,414,374     (22,080,628)       8,399,586
 Issuance of common stock....................     782,503       7,825      6,326,028              --        6,333,853
 Exercise of stock options...................      31,967         319        208,131              --          208,450
 Conversion of common stock to redeemable
  preferred stock (Note 6)...................    (352,941)     (3,529)    (2,996,471)             --       (3,000,000)
 Accrued dividend on preferred stock.........          --          --             --        (626,400)        (626,400)
 Net loss for 1994...........................          --          --             --      (7,964,918)      (7,964,918)
                                               ------------- ----------- -------------- ---------------- ----------------
Balance at December 31, 1994.................   7,045,523      70,455     33,952,062     (30,671,946)       3,350,571
 Issuance of common stock....................   4,002,941      40,030     50,960,330              --       51,000,360
 Exercise of stock options and warrants......      67,501         675        573,221              --          573,896
 Accrued dividend on preferred stock.........          --          --             --      (1,329,007)      (1,329,007)
 Net loss for 1995...........................          --          --             --     (26,915,178)     (26,915,178)
                                               ------------- ----------- -------------- ---------------- ----------------
Balance at December 31, 1995.................  11,115,965     111,160     85,485,613     (58,916,131)      26,680,642
 Conversion of preferred to common...........      91,071         910        804,034              --          804,944
 Exercise of stock options and warrants......      25,497         255        219,126              --          219,381
 Accrued dividend on preferred stock.........          --          --             --      (1,006,285)      (1,006,285)
 Net loss for the nine months ended September
  30, 1996...................................          --          --             --     (19,807,287)     (19,807,287)
                                               ------------- ----------- -------------- ----------------  ---------------
Balance at September 30, 1996 (unaudited)  ..  11,232,533    $112,325    $86,508,773    $(79,729,703)    $  6,891,395
                                               ============= =========== ============== ================ ================

</TABLE>

               See notes to consolidated financial statements.

                               F-5

<PAGE>
                         ORION NETWORK SYSTEMS, INC.
                    CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                                           NINE MONTHS ENDED
                                                               YEAR ENDED DECEMBER 31,                       SEPTEMBER 30,
                                                      --------------------------------------------   ---------------------------
                                                            1993          1994          1995             1995             1996
                                                      ------------- ------------- ---------------- ---------------   ---------------
                                                                                                      (UNAUDITED)      (UNAUDITED)
<S>                                                   <C>           <C>           <C>              <C>             <C>
OPERATING ACTIVITIES
Net loss............................................  $ (7,886,071) $ (7,964,918) $(26,915,178)    $(19,985,085)      $(19,807,287)
Adjustments to reconcile net loss to net cash
used in operating activities: ......................
 Depreciation and amortization......................     1,798,526     1,713,117    31,403,376       22,276,632         26,402,947
 Amortization of deferred financing costs...........            --            --     2,130,588        1,597,941          1,597,941
 Provision for bad debts............................            --            --       277,529          671,226            524,999
 Satellite incentives and accrued interest..........            --            --     5,185,834        6,463,771          1,747,334
 Limited Partners' interest in Orion Atlantic.......    (7,843,860)   (7,390,331)  (46,109,627)     (33,454,227)       (24,800,306)
 Minority interest in other consolidated
  entities..........................................         7,496        37,627        20,617           27,489                608
 Gain on sale of assets.............................       (50,278)      (54,737)      (59,301)         (45,616)           (41,054)
 Changes in operating assets and liabilities: ......
  Accounts receivable...............................        63,075      (426,281)   (4,915,257)      (1,921,320)        (1,143,969)
  Accrued interest..................................            --            --      (129,810)              --            (27,315)
  Prepaid expenses and other current assets.........       197,025       159,030    (3,017,782)      (4,261,808)        (2,416,138)
  Other assets......................................      (279,902)      321,443      (519,773)      (1,618,912)           427,741
  Accounts payable and accrued liabilities..........     3,125,830       535,092     7,327,377          745,518         (5,818,070)
  Other current liabilities.........................            --            --     3,670,988          977,374          3,279,274
  Interest payable..................................            --            --      (885,106)      (1,883,773)        (4,876,714)
                                                      ------------- ------------- ---------------- ---------------   ---------------
Net cash used in operating activities...............   (10,868,159)  (13,069,958)  (32,535,525)     (30,410,790)       (24,950,009)

INVESTING ACTIVITIES
Capital expenditures................................   (44,130,325)  (51,103,006)   (9,060,412)      (3,863,019)       (10,266,012)
Cost of business acquisition........................        (2,721)           --            --               --                 --
Refund from satellite manufacturer..................            --            --     2,750,000        2,750,000                 --
FCC license costs...................................       (93,545)      (96,030)     (558,817)        (381,337)          (117,600)
                                                      ------------- ------------- ---------------- ---------------   ---------------
Net cash used in investing activities...............   (44,226,591)  (51,199,036)   (6,869,229)      (1,494,356)       (10,383,612)

FINANCING ACTIVITIES
Limited Partners' capital contributions.............          --     4,000,000     7,600,000        7,600,000         30,135,000
Redemption of limited partner interest..............            --            --    (4,450,000)              --                 --
Expenditures on equity financing costs..............       (31,773)     (409,181)           --               --                 --
Proceeds from issuance of redeemable preferred
 stock .............................................            --    10,928,293     4,483,001       51,616,441            219,380
Proceeds from issuance of common stock and ........
subscriptions, net of issuance costs................     1,807,345     6,542,303    51,974,436        4,483,001                 --
PPU borrowings......................................     1,400,000     4,375,000     2,275,000        2,275,000                 --
Proceeds from issuance of notes payable.............     2,146,625     8,136,191       551,850          551,850                 --
Proceeds from senior notes payable to banks ........    45,604,063    36,685,505    18,367,134       18,367,134                 --
Repayment of senior notes payable to banks .........            --            --   (12,468,049)      (9,718,049)       (22,768,340)
Repayment of notes payable..........................       (46,320)           --    (1,916,966)      (1,668,818)        (2,328,096)
Payments on capital lease obligations...............            --      (252,823)     (576,727)        (416,679)          (559,266)
Capacity and other liabilities......................            --     2,101,168    17,483,733       10,662,162         12,179,977
Distributions to joint venture minority
 interest...........................................       (49,073)      (22,873)      (25,904)         (25,904)                --
                                                      ------------- ------------- ---------------- ---------------  ---------------
Net cash provided by financing activities ..........    50,830,867    72,083,583    83,297,508       83,726,138         16,878,655
                                                      ------------- ------------- ---------------- ---------------  ---------------
Net increase (decrease) in cash and cash
 equivalents........................................    (4,263,883)    7,814,589    43,892,754       51,820,992        (18,454,966)
Cash and cash equivalents at beginning of
 period.............................................     7,668,125     3,404,242    11,218,831       11,218,831         55,111,585
                                                      ------------- ------------- ---------------- ---------------  ---------------
Cash and cash equivalents at end of period .........  $  3,404,242  $ 11,218,831  $ 55,111,585     $ 63,039,823     $   36,656,619
                                                      ============= ============= ================ ===============  ===============

</TABLE>

                 See notes to consolidated financial statements.

                                       F-6
<PAGE>
                         ORION NETWORK SYSTEMS, INC.

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

           (INFORMATION WITH RESPECT TO SEPTEMBER 30, 1996 AND FOR
         THE NINE MONTHS ENDED SEPTEMBER 1995 AND 1996 IS UNAUDITED)

1. ORGANIZATION

   Orion Network Systems, Inc. (Orion) was incorporated in the State of Delaware
on October 26, 1982 (inception) under the name Orion Satellite Corporation,  and
in January  1988,  changed its name to Orion  Network  Systems,  Inc.  Orion has
developed and operates an international satellite  communications system for use
in private communications networks to multinational  businesses and transmission
capacity  for video and  other  program  distribution  services.  Orion's  first
satellite (Orion 1) was  successfully  launched on November 29, 1994. Orion took
delivery of the Orion 1 satellite on January 20, 1995. As a result,  Orion is no
longer  considered a development  stage enterprise  effective  January 1995. For
periods prior to January 1995, Orion was in the development stage.

   Since 1989,  management  has been involved  primarily in  developing  Orion's
partnership, International Private Satellite Partners, L.P. (Orion Atlantic), in
order to raise the necessary  capital to finance the  construction and launch of
up to  two  telecommunications  satellites  in  geosynchronous  orbit  over  the
Atlantic Ocean and to establish a multinational sales and service  organization.
Orion  has been  financed  by  equity  and debt from  individual  and  corporate
investors.  British  Aerospace PLC or its affiliates  (BAe) and Lockheed  Martin
Corporation  or its  affiliates  (Lockheed  Martin) are  stockholders  of Orion,
limited  partners in Orion  Atlantic  and were  significant  contractors  in the
construction and launch of the satellite system.

   In June 1991,  Orion,  through a  wholly-owned  subsidiary,  Orion  Satellite
Corporation  (OrionSat),  received  a license  from the  Federal  Communications
Commission  (FCC)  authorizing  it to construct,  launch and operate a satellite
system comprised of two satellites to provide  international  telecommunications
services. Pursuant to an application by OrionSat, the license was transferred to
Orion  Atlantic on April 19, 1994,  by order of the FCC. In December  1991,  the
initial phase of the  partnership  financing  plan was concluded by a closing on
equity commitments in the form of limited partnership  interests aggregating $90
million and execution of a credit  agreement  related to senior debt commitments
for up to $251  million  (see  further  discussion  in Note 3). Also in December
1991,  notice to proceed with the construction  contract for the first satellite
was given to BAe, the prime contractor.

   OrionSat is the sole  general  partner in Orion  Atlantic  and received a 25%
equity  interest  as of  the  initial  closing  for,  among  other  things,  its
contribution  of certain  rights and  interests  under its FCC license,  certain
contract rights, and other tangible and intangible assets. Orion participates as
a limited partner with a 16 2/3% equity interest and  participates  fully in the
obligations  and rights of the  limited  partnership.  The  aggregate  ownership
interest by Orion and its  subsidiaries  in Orion  Atlantic is 41 2/3% (see Note
3).

   In August 1995, the Company  completed its initial public  offering of common
stock by  selling  4,000,000  common  shares at $14 per share.  Proceeds  to the
Company, net of underwriting discount,  aggregated approximately $52.25 million.
In July 1995,  in  connection  with the planned  initial  public  offering,  the
shareholders  approved a 1 for 1.36 reverse stock split.  All  references in the
consolidated  financial  statements with regard to shares, per share amounts and
share prices have been adjusted for the reverse stock split.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

CONSOLIDATION POLICY

   The consolidated  financial statements include the accounts of Orion, its two
wholly-owned  subsidiaries OrionNet, Inc. (OrionNet) and OrionSat, its 83% owned
subsidiary,  Asia Pacific Space and Communications Ltd. (Asia Pacific) (see Note
7), the Orion Financial  Partnership,  in which Orion holds a 50% interest,  and
Orion Atlantic, in which Orion holds, at December 31, 1995, a 41 2/3% ownership

                                       F-7

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-(Continued)

interest.  Management  control and direction of Orion  Atlantic by OrionSat is a
requirement  of the FCC in order  for Orion  Atlantic  to  continue  to hold the
license  authority  received in June 1991.  OrionSat,  as the general partner of
Orion Atlantic, exercises such control through the provisions of the partnership
agreement.  The amount  reflected  in the balance  sheet as  "Limited  Partners'
interest in Orion Atlantic"  represents  amounts invested by entities other than
Orion (net of syndication  costs related to the investments)  adjusted for those
Limited  Partners'  share of operating  results.  All  significant  intercompany
accounts and transactions have been eliminated.

USE OF ESTIMATES

   The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial  statements and accompanying notes.
Actual results could differ from those estimates.

CASH AND CASH EQUIVALENTS

   Orion considers all highly liquid investments with a maturity of three months
or less  when  purchased  to be cash  equivalents.  Cash  and  cash  equivalents
includes cash in banks and short term investments, as follows:


                                       DECEMBER 31, 1995 
                                      ------------------ 
               Cash ................  $ 3,091,277        
               Money market funds  .    6,018,925        
               FHLMC discount notes    11,389,208        
               Commercial paper  ...   34,612,175        
                                      ------------------ 
                                      $55,111,585        
                                      ================== 
               

   The FHLMC  discount notes and  commercial  paper mature  between  January and
March 1996.

STATEMENT OF CASH FLOWS

   Non-cash  investing  and  financing  activities  and  supplemental  cash flow
information includes:

<TABLE>
<CAPTION>
                                                                                                  NINE MONTHS ENDED
                                                             YEAR ENDED DECEMBER 31,                SEPTEMBER 30,
                                                    ---------------------------------------- --------------------------
                                                         1993          1994         1995          1995         1996
                                                    -------------- ------------ ------------ ------------- ------------
<S>                                                 <C>            <C>          <C>          <C>           <C>     
Satellite construction costs financed by notes
payable                                             $27,517,175   $ 7,862,050   $        --  $         --   $        --
Conversion of common stock to redeemable
preferred stock                                              --     3,000,000            --            --            --
Property and equipment financed by capital leases            --        94,323     4,350,766            --            --
Accrued dividend on preferred stock                          --       626,400     1,329,007       959,646     1,006,285
Conversion of preferred stock to common stock                --            --         9,000            --       804,944
Premium on satellite due to redemption of L.P. 
interest                                                     --            --     3,066,925            --            --
Redemption of STET interest with notes payable               --            --     8,000,000            --            --
Reduction in amount due to satellite manufacturer            --            --       485,799            --            --
Satellite incentive obligation capitalized                   --            --    14,816,406            --            --
Interest paid during the year, net of amounts
capitalized                                              37,983        45,051    11,312,875    10,857,800    11,436,301

</TABLE>

                                      F-8

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-(Continued)

NET LOSS PER COMMON SHARE

   Net loss per common share is based on the weighted  average  number of common
shares  outstanding  during the  period.  Pursuant  to the  requirements  of the
Securities  and Exchange  Commission,  common  stock  issued and stock  issuable
relating to convertible preferred stock, warrants and options granted within one
year of filing the  registration  statement  relating to the  Company's  initial
public  offering of common  stock were  treated as  outstanding  for all periods
prior to the second quarter of 1995.

INTERIM FINANCIAL STATEMENTS

   The  accompanying  financial  statements as of September 30, 1996 and for the
nine months  ended  September  30, 1995 and 1996 are  unaudited  but include all
adjustments, consisting only of normal recurring accruals, which Orion considers
necessary for a fair  presentation of financial  position and operating  results
for those  interim  periods.  The  operating  results for the nine months  ended
September  30, 1996 are not  necessarily  indicative  of the results that may be
expected for the year ended December 31, 1996.

PROPERTY AND EQUIPMENT

   Property and equipment are carried at cost. Depreciation and amortization are
calculated using the  straight-line  method over their estimated useful lives as
follows:

              Satellite and related equipment .....  10.5 years
              Telecommunications equipment  .......   2-7 years
              Furniture and computer equipment  ...   2-7 years


   Costs incurred in connection with the construction and successful  deployment
of the  satellite  and related  equipment  are  capitalized.  Such costs include
direct contract cost,  allocated indirect costs, launch costs, launch insurance,
construction  period  interest  and the  present  value of  satellite  incentive
payments,  Orion began depreciating the satellite over its estimated useful life
commencing on the date of operational delivery in orbit (January 20, 1995).

   In March  1995,  the  Financial  Accounting  Standards  Board  (FASB)  issued
Statement No. 121,  "Accounting for the Impairment of Long-Lived  Assets and for
Long-Lived  Assets to Be Disposed Of",  which requires  impairment  losses to be
recorded on long-lived  assets used in operations  when indicators of impairment
are present and the  undiscounted  cash flows estimated to be generated by those
assets  are less  than the  assets'  carrying  amount.  Statement  No.  121 also
addresses the accounting for long-lived  assets that are expected to be disposed
of. The effect of adoption was not material.

DEFERRED FINANCING COSTS

   Deferred  financing  costs  related to  obtaining  debt and Orion's  share of
equity  financing for Orion  Atlantic are amortized  over the period the debt is
expected to be  outstanding.  Accumulated  amortization  at September  30, 1996,
December  31,  1995  and  1994  was   $8,589,000,   $6,990,000   and  $4,860,000
respectively.  Amortization  through January 1995 was capitalized as part of the
cost of the satellite.  Costs of  approximately  $3.4 million relating to a debt
offering  which was  postponed  in  November  1995 have  been  charged  to other
expense. 

                                       F-9

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-(Continued)

OTHER ASSETS

   Other  assets  consist   principally  of  FCC  license   application   costs,
organization  costs and  goodwill.  The  Company  began  amortizing  FCC license
application  costs  related  to Orion 1 in  January  1995 and will  continue  to
amortize  these  costs  over  the  estimated   useful  life  of  the  satellite.
Organization   costs  and  goodwill  are  amortized  over  five  and  ten  years
respectively.  Accumulated amortization at September 30, 1996, December 31, 1995
and 1994 was $3,535,000, $3,069,000 and $1,934,000, respectively.

REVENUE RECOGNITION

   Orion's  revenue  results  from  providing   telecommunications  and  related
services.  Revenue is recognized  as earned in the period in which  services are
provided.

   The  following  summarizes  the Company's  domestic and foreign  revenues for
1995:

         Revenues from unaffiliated customers                 
           United States......................  $ 8,528,736   
           Europe.............................    8,056,146   
         Revenues from related parties .......    5,699,000   
                                                ------------- 
         Total services revenue...............  $22,283,882   
                                                ============= 
                                                              
INTEREST RATE MODIFICATION AGREEMENTS

   Orion  may,  from  time  to  time,  enter  into  interest-rate  swap  and cap
agreements to modify the interest characteristics of its outstanding debt from a
floating to a fixed-rate basis. These agreements involve the receipt of floating
rate amounts in an exchange for  fixed-rate  interest  payments over the life of
the  agreement  without an  exchange of the  underlying  principal  amount.  The
differential  to be paid or  received is accrued as  interest  rates  change and
recognized as an adjustment to interest expense related to the debt. The related
amount  payable to or  receivable  from  counterparties  is included in interest
payable.  The fair  values  of the swap  agreements  are not  recognized  in the
financial statements. (See Notes 5 and 8)

INCOME TAXES

   The Company adopted the provisions of FASB Statement No. 109, "Accounting for
Income Taxes"  effective  January 1, 1993,  and as a result,  uses the liability
method of accounting  for income taxes.  There was no cumulative  effect to this
accounting  charge.  Under this method,  deferred tax assets and liabilities are
determined  based on differences  between  financial  reporting and tax bases of
assets and  liabilities  and are  measured  using the enacted tax rates and laws
that will be in effect when the differences are expected to reverse.

                                      F-10

<PAGE>

                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES-(Continued)

   Following  is a summary of the  components  of the net  deferred tax asset at
December 31, 1995 and 1994 (in thousands):

   Tax benefit of temporary differences:

                                                   DECEMBER 31,      
                                             ----------------------- 
                                                 1994        1995    
                                             ----------- ----------- 
          Net operating loss carryforwards   $ 12,480    $ 19,463    
          Orion Atlantic losses ...........    (2,040)      1,237    
          Other ...........................       830       1,056    
                                             ----------- ----------- 
          Total ...........................    11,270      21,756    
          Valuation allowance .............   (11,270)    (21,756)   
                                             ----------- ----------- 
          Net deferred tax asset ..........  $     --    $      --   
                                             =========== =========== 
          
   At December 31, 1995,  Orion has  approximately  $51,219,000 in net operating
loss carryforwards which expire at varying dates from 2004 through 2010. The use
of these loss  carryforwards may be limited under the Internal Revenue Code as a
result of ownership changes  experienced by Orion. Due to uncertainty  regarding
its ability to realize the benefits of such net  operating  loss  carryforwards,
the Company has established a valuation allowance for the full amount of its net
operating loss carryforwards.

RECLASSIFICATIONS

   Certain prior year amounts have been  reclassified  to conform to the current
year presentation.

3. ORION ATLANTIC

   Orion  Atlantic  is  a  Delaware  limited   partnership   formed  to  provide
international private communications networks and basic transponder capacity and
capacity  services  (including  ancillary  ground  services) to  businesses  and
institutions  with  trans-Atlantic  and  intra-European  needs. The business was
organized by OrionSat,  the general  partner of Orion  Atlantic.  The  principal
purposes of Orion Atlantic are to finance the construction, launch and operation
of up to two  telecommunications  satellites  in  geosynchronous  orbit over the
Atlantic Ocean and to establish a multinational sales and service  organization.
OrionSat was granted  final  authority by the FCC on June 27, 1991 to construct,
launch and operate an international  communications  satellite system, including
two orbital slots at 37.5' W.L. and 47' W.L.  OrionSat,  the general partner
of Orion Atlantic, entered into an agreement with Orion Atlantic and its limited
partners  on December  20,  1991,  to convey the FCC license to Orion  Atlantic.
OrionSat filed an application to transfer the satellite  authorization  to Orion
Atlantic  in December  1992;  the  transfer  was granted by the FCC on April 19,
1994.  Effective  January 20,  1995,  Orion  Atlantic is no longer  considered a
development stage enterprise.  For periods prior to January 1995, Orion Atlantic
was considered a development stage enterprise.

   Eight international  corporations,  including Orion,  invested a total of $90
million in equity as limited partners in Orion Atlantic. Orion Atlantic also has
a credit facility which provided up to $251 million for the first satellite from
a syndicate of major  international  banks led by Chase  Manhattan Bank, N.A. In
addition to their equity investments,  the Limited Partners have agreed to lease
capacity on the satellites up to an aggregate $155 million and have entered into
additional  contingent  capacity lease  contracts  ("contingent  call") up to an
aggregate  $271 million,  as support for repayment of the senior debt.  The firm
capacity leases and contingent calls are payable over a seven-year  period after
the first  satellite is placed in service.  In July 1995,  January and July 1996
the Limited  Partners  (excluding the Company) paid $7.6 million,  $18.0 million
and $12.1 million, respectively, pursuant to these contingent calls.

                                      F-11

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3. ORION ATLANTIC-(Continued)

   Satellite  Construction  Contract  -- In  December  1991,  the  contract  for
construction,  launch services,  and launch and commissioning  insurance for two
communications   satellites  went  into  effect  with   OrionSat's   rights  and
obligations  under the contract being assigned to Orion  Atlantic.  During 1993,
Orion Atlantic  terminated its commitment to purchase the second  satellite and,
as a result,  incurred a $5 million  termination charge. Such amount is included
in other income  (expense) in the  accompanying  Statements of  Operations.  The
satellite was constructed by MMS Space Systems, Limited ("MMS Space Systems").

   The fixed base price of the total contract, excluding obligations relating to
satellite  performance,  aggregated  $227  million  and has been  fully  paid at
December 31, 1995.  In addition to the fixed base price,  the contract  requires
payments to be made, in lieu of a further  contract price increase,  aggregating
approximately $44 million through 2006. Such payments are due, generally,  if 24
out of 34 satellite  transponders  are operating  satisfactorily.  Shortly after
acceptance of the satellite in January 1995,  the Company filed a warranty claim
with the satellite  manufacturer relating to one transponder that did not appear
to be  performing in accordance  with contract  specifications.  In August 1995,
Orion Atlantic  received a one time refund of $2.75 million which was applied as
a mandatory prepayment to the senior notes payable -- banks (See Note 5).

   The Company believes that since Orion 1 is properly deployed and operational,
based upon industry data and  experience,  payment of the  obligation  mentioned
above is highly  probable and the Company has  capitalized  the present value of
this  obligation  of  approximately  $14.8  million  as part of the  cost of the
satellite.  Payment  of amounts  due under this  obligation  are  delayed  until
payment is permitted  under the senior notes  payable -- banks (See Note 5). The
present  value was  estimated  by  discounting  the  obligation  at 14% over the
expected term,  assuming payment of the incentives begins upon expiration of the
senior notes payable -- banks in 2002.

   Partnership and Limited  Partners -- OrionSat has the primary  responsibility
for the  control,  management  and  operations  of  Orion  Atlantic.  Under  the
partnership  agreement,  the limited  partners  have  rights of  approval  for a
limited  number  of  matters,  e.g.,  terms  for  acceptance  of  new  partners,
significant budget modifications, and certain borrowings.

   The  financing  and legal  structure of Orion  Atlantic  restricts the use of
partnership  resources to the purposes of constructing,  launching and operating
the  satellite  system.  Cash will be  distributable  by Orion  Atlantic  to the
partners  in the  future  only after  sufficient  operating  revenues  have been
generated to pay satellite  system  operating costs and debt service.  Orion and
OrionSat  will share pro rata with the partners in $28 million of the first $100
million  of cash  available  for  distribution  to the  partners  as a return of
capital.  Thereafter,  operating cash flow is  distributable  based on ownership
interests.

   Condensed  balance sheet  information for Orion Atlantic at December 31, 1995
and 1994 follows:

                                                  1994            1995
                                            --------------- ---------------
ASSETS
Current assets ...........................  $  5,664,469    $ 14,085,169
Property and equipment, net ..............   306,088,340     303,889,894
Deferred financing costs and other .......    17,473,547      16,051,517
                                            --------------- ---------------
Total assets..............................  $329,226,356    $334,026,580
                                            =============== ===============
LIABILITIES AND PARTNERSHIP CAPITAL
Current liabilities.......................  $ 27,024,035    $ 52,883,250
Long-term debt and other liabilities  ....   234,909,566     284,110,104
Partnership capital subject to redemption     10,000,000              --
Partnership capital ......................    57,292,755       1,533,226
Less: Orion Network Systems, Inc. note  ..            --      (4,500,000)
                                            --------------- ---------------
Total liabilities and partnership capital   $329,226,356    $334,026,580
                                            =============== ===============



                                      F-12

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -

            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3. ORION ATLANTIC-(Continued)

   Redemption of STET Partnership  Interest;  Issuance of New Interest to Orion.
- -- On November 21, 1995 Orion Atlantic redeemed the limited partnership interest
held by STET (the "STET  Redemption").  Such  redemption  was for $11.5 million,
including  $3.5  million of cash and $8.0 million in 12%,  promissory  notes due
through 1997.  STET's firm and contingent  capacity  leases will remain in place
until released by the Banks under the Orion 1 Credit  Facility.  STET's existing
contractual  arrangements  with Orion Atlantic have been modified in a number of
respects, including (i) a reduction of approximately $3.5 million in amounts due
by Orion Atlantic to Telespazio  S.p.A.,  an affiliate of STET,  over a ten-year
period  under  contracts  relating  to the  construction  of  Orion  2,  back-up
tracking,  telemetry  and  command  services  through  a  facility  in Italy and
engineering consulting services, (ii) the establishment of ground operations and
distribution  agreements between Orion Atlantic and Telecom Italia, a subsidiary
of STET,  relating to Italy,  and the  granting to Telecom  Italia of  exclusive
marketing rights relating to Italy for a period ending December 1998 conditioned
upon  Telecom  Italia  achieving  certain  sales  quotas,  and  (iii)  canceling
exclusive ground operations and sales  representation  agreements  between Orion
Atlantic and STET (or its affiliates) relating to Eastern Europe.

   Orion  Atlantic   funded  the  STET  Redemption  by  selling  a  new  limited
partnership interest to Orion for $8 million (including $3.5 million in cash and
$4.5 million in 12% promissory  notes due through 1997).  In connection with the
STET  redemption,  Orion agreed to indemnify  Telecom  Italia for payments which
were made in July 1995 of $950,000  and which would be made in the future  under
its firm and contingent capacity agreements with Orion Atlantic and posted a $10
million  letter of credit to support such  indemnity.  The Company has accounted
for this transaction as an acquisition of a minority  interest and, as a result,
approximately  $3.1 million has been  allocated to the cost of the satellite and
related equipment.

   Other  Transactions  Involving  Limited  Partners -- Certain Limited Partners
were  also  subcontractors  under the  satellite  construction  contract.  Orion
Atlantic  also has  contracted  with Limited  Partners or their  affiliates  for
certain  consulting,  post-launch support services and other services related to
developing  the business.  Approximately  $5.0 million has been  incurred  under
these agreements, all of which was capitalized.

   During 1995,  Orion Atlantic  entered into  agreements  with certain  Limited
Partners (including the Company) under which the participating  Limited Partners
would  voluntarily  give up their  rights to receive  capacity  under their firm
capacity  agreements  through January 1996. The  participating  Limited Partners
would  continue to make  payments for such  capacity but would have the right to
receive  refunds from Orion Atlantic out of cash available after operating costs
and  payments  under the Credit  Facility.  Through  December  31,  1995,  Orion
Atlantic has received $14.1 million (excluding  payments from the Company) under
the firm capacity agreements subject to refund,  which amount is included in the
balance  sheet  caption  "Other  liabilities."  In  addition,  services  revenue
included  $5.7  million  in 1995  from  Limited  Partners  pursuant  to the firm
capacity commitments, not subject to refund.

4. COMMITMENTS AND CONTINGENCIES

   Obligations  with Respect to Orion  Atlantic -- Orion  presently  has certain
significant  obligations to Orion Atlantic and the Limited  Partners,  including
commitments  under  satellite  capacity   agreements  between  Orion  and  Orion
Atlantic,  under which Orion will be liable to pay Orion Atlantic  approximately
$2.5 million per year for seven years for satellite capacity and is contingently
liable for up to an  additional  $4.3  million per year for up to seven years if
Orion Atlantic  experiences cash flow deficits  commencing when Orion Atlantic's
first satellite begins commercial  operations;  and  reimbursement  (jointly and
severally with OrionSat) with respect to a $10 million letter of credit provided
by OrionSat to a limited partner,  which is secured by 259,515 shares of Orion's
common stock held in treasury and cash distributions that Orion and OrionSat may
receive with respect to their partnership interests in Orion Atlantic.

                                      F-13

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4. COMMITMENTS AND CONTINGENCIES-(Continued)

   Orion 1  satellite  -- In November  1995,  a portion of the Orion 1 satellite
experienced  an anomaly  that  resulted  in a  temporary  service  interruption,
lasting  approximately two hours, in the dedicated capacity serving the European
portion of Orion Atlantic's services. The nine affected transponders account for
a majority of Orion Atlantic's  present  revenues.  Full service to all affected
customers  was  restored  using  redundant  equipment  on the  satellite.  Orion
Atlantic  believes,  based on the data and the Telesat Report (issued by Telesat
Canada,  independent  engineering  consultants  dated November 14, 1995),  that,
because  the  redundant  component  is  functioning  fully  in  accordance  with
specifications  and the performance  record of similar components is strong, the
anomalous  behavior  is  unlikely  to affect  the  expected  performance  of the
satellite over its useful life.  Furthermore,  there has been no effect on Orion
Atlantic's ability to provide services to customers.  However, in the event that
the currently  operating component fails, Orion 1 would experience a significant
loss of usable capacity.  In such event,  while Orion Atlantic would be entitled
to insurance  proceeds of approximately  $50 million and could lease replacement
capacity  and function as a reseller  with respect to such  capacity (at reduced
levels of  profitability),  the loss of capacity  would have a material  adverse
effect on Orion and on Orion Atlantic.

   Orion 2 satellite -- In connection with the proposed  financing of Orion 2, a
subsidiary of Orion Atlantic entered into a satellite  construction contract for
Orion 2 with MMS Space  Systems,  subject to completion  of proposed  financing.
Depending  upon the timing and terms and conditions of the financing for Orion 2
and the then  satellite  design,  the Company  may seek to renew this  satellite
contract with MMS Space  Systems.  There can be no assurance that the terms of a
new satellite  contract will resemble  those of the satellite  contract with MMS
Space Systems. The Company expects to use Orion Atlantic's  Tracking,  Telemetry
and Control (TT&C) facility to control Orion 2 (although  authorizations will be
needed).

   Eutelsat Lease -- In January 1993, Orion Atlantic entered into a lease, which
expired in December  1994,  with one of its limited  partners  under which Orion
Atlantic  leased  one-half of a transponder  on a EUTELSAT  satellite for use in
providing private network services prior to the operational delivery of Orion 1.
The lease required quarterly payments of $481,000 of which $855,000 was deferred
by the limited  partner  until March 1995.  Rent under this lease  totaled  $1.9
million in 1994 and $1.8 million in 1993.

   Litigation  -- In October 1995,  Skydata  Corporation  ("Skydata"),  a former
contractor,  filed suit against Orion Atlantic,  Orion Satellite Corporation and
Orion,  in the United States  District Court for the Middle District of Florida,
claiming  that certain  Orion  Atlantic  operations  using frame relay  switches
infringe  a Skydata  patent.  Skydata's  suit  sought  damages  in excess of $10
million and asked that any damages  assessed be trebled.  On December  11, 1995,
the Orion  parties  filed a motion to dismiss the lawsuit on the grounds of lack
of jurisdiction and violation of a mandatory arbitration agreement. In addition,
on December 19, 1995, the Orion parties filed a Demand for  Arbitration  against
Skydata  with  the  American  Arbitration   Association  in  Atlanta,   Georgia,
requesting   damages  in  excess  of  $100,000   for  breach  of  contract   and
declarations,   among  other  things,  that  Orion  and  Orion  Atlantic  own  a
royalty-free license to the patent, that the patent is invalid and unenforceable
and that Orion and Orion Atlantic have not infringed on the patent. See Note 11.

   While Orion is party to  regulatory  proceedings  incident to the business of
Orion,  there  are no  other  material  legal  proceedings  pending  or,  to the
knowledge of management, threatened against Orion or its subsidiaries.

   Other -- Orion has entered  into  operating  leases,  principally  for office
space.  Rent expense was $735,000,  $668,000 and $661,000 during 1995, 1994, and
1993, respectively.

                                      F-14

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

4. COMMITMENTS AND CONTINGENCIES-(Continued)

   Future minimum lease payments are as follows:

                    1996...  $  774,357   
                    1997...     793,716   
                    1998...     887,138   
                    1999  .     907,477   
                             ------------ 
                             $3,362,688   
                             ============ 
                    
5. LONG-TERM DEBT

   Long-term debt consists of the following:

                                               DECEMBER 31,
                                     -------------------------------
                                           1994            1995
                                     --------------- ---------------
Senior notes payable -- banks  ....  $224,584,097    $230,483,182
Note payable -- TT&C Facility  ....     9,348,730       8,774,266
Satellite incentive obligation ....            --      20,002,240
Notes payable -- STET..............            --       8,000,000
Notes payable -- Limited Partners .     5,775,000       8,050,000
Other..............................     2,483,319       3,966,708
                                     --------------- ---------------
 Total long-term debt .............   242,191,146     279,276,396
Less: current portion .............    12,015,663      28,607,110
                                     --------------- ---------------
 Long-term debt less current
  portion..........................  $230,175,483    $250,669,286
                                     =============== ===============

Total interest (including commitment fees and amortization of deferred financing
costs)  incurred for the years ended December 31, 1995, 1994 and 1993 was $26.0,
$27.0,  and  $16.3  million,  respectively.  Substantially  all of the  interest
incurred in 1994 and 1993 has been capitalized, while approximately $1.3 million
of interest was capitalized in 1995.

   Aggregate  annual  maturities of long-term  debt consist of the following (in
thousands):

                              1996........  $ 28,607   
                              1997........    34,917   
                              1998........    34,358   
                              1999........    46,853   
                              2000........    43,590   
                              Thereafter .    90,951   
                                            ---------- 
                                            $279,276   
                                            ========== 

   Senior Notes  Payable to Banks -- In December  1991,  OrionSat,  on behalf of
Orion  Atlantic,  executed a credit  agreement  for up to $400 million of senior
debt from an international banking syndicate.  Amounts advanced under the credit
facility  are  secured  by the assets of Orion  Atlantic  and are due over seven
years in graduated  installments  beginning July 31, 1995. The credit  agreement
prohibits  the  extension  of credit by Orion  Atlantic to any  affiliate of the
partnership,  as defined.  Accordingly,  Orion  Atlantic may not loan or advance
funds to the Company or its  affiliates.  The credit  agreement  also  restricts
distributions  to the partners.  At December 31, 1995, none of Orion  Atlantic's
capital was  available  for  distribution.  The credit  facility has a number of
other  customary  covenants and  requirements,  including the Banks' approval of
significant changes to the construction contract and increases in

                                      F-15

<PAGE>

                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5. LONG-TERM DEBT-(Continued)

budgeted  costs.  The Banks  also have full  recourse  to  OrionSat  as  general
partner,  and Orion has pledged its  investment  in the common stock of OrionSat
and its limited partner ownership interest to the Banks.

   Amounts outstanding under the credit facility bear interest at 1.75% over the
LIBOR (7.68% at December 31, 1995).  Orion Atlantic has entered into  agreements
with Chase Manhattan Bank, N.A.  (Chase) for interest rate hedging  arrangements
which  fixed  the  maximum  interest  rate  through  November  1995  at  11.54%.
Thereafter a self funding  interest rate cap agreement is in place relating to a
notional amount declining every six months from $150 million effective  November
30, 1995 to $15.6 million  effective March 31, 2001.  Under the terms of the cap
agreement,  when LIBOR  equals or exceeds 5.5% Orion  Atlantic  pays Chase a fee
equal to 3.3% per annum of the notional amount and receives a payment from Chase
in an amount equal to the  difference  between the actual LIBOR rate and 5.5% on
the notional  amount.  There was an  unrealized  loss as of December 31, 1995 of
approximately  $4.6 million relating to these  arrangements.  Commitment fees of
0.5% of the unused Credit Facility are payable semiannually.

   Note  Payable -- TT&C  Facility -- Orion  Atlantic  entered  into a financing
arrangement with General Electric  Capital  Corporation  ("GECC") to finance the
Tracking Telemetry and Control (TT&C) Facility. The TT&C arrangement calls for a
note  payable,  the  maximum  amount of which is $11 million of which up to $8.9
million is for payment to Lockheed  Martin under the  Satellite  Control  System
Contract,  with the remaining  balance available to be drawn to finance the cost
of launch  insurance  required  for the  benefit of GECC.  In June  1995,  Orion
Atlantic  accepted the TT&C Facility and Orion Atlantic  refinanced $9.3 million
from GECC as a seven-year  term loan,  payable  monthly.  Orion  Atlantic made a
mandatory  prepayment of $1 million in January 1996.  The interest rate is fixed
at a 13.5%.

   The TT&C debt is secured by the TT&C Facility,  the Satellite  Control System
Contract and Orion Atlantic's  leasehold interest in the TT&C Facility land. The
TT&C  financing  agreement  contains  similar  representations,  warranties  and
covenants to those in the senior notes.

   Satellite  incentive  obligation  -- The  obligations  relating to  satellite
performance (see Note 3) have been recorded at the present value  (discounted at
14%, the Company's estimated incremental borrowing rate for unsecured financing)
of the required payments  commencing at the maturity of the senior notes payable
to banks and  continuing  through  2006.  Under  the  terms of the  construction
contract,  payment of the  obligation  is delayed  until such time as payment is
permitted  under the senior notes  payable to banks.  

   Notes Payable -- STET -- In connection with the STET Redemption (see Note 3),
the Company  issued STET $8 million of  promissory  notes which bear interest at
12% per annum.  Payments are due as follows:  $2.5 million plus accrued interest
on December  31, 1996;  $3.5  million  plus  accrued  interest on the earlier of
December 31, 1997 or the  refinancing of the senior notes payable to banks;  and
the remaining $2.0 million in monthly  installments of $0.2 million plus accrued
interest beginning January 1997.

   Notes  Payable  --  Limited  Partners  -- In 1993,  Orion  Atlantic  received
commitments for Preferred  Participation  Units (PPUs)  aggregating $9.5 million
from  certain  Limited  Partners  (including  $1.5  million  from Orion  Network
Systems) for development of Orion Atlantic's network services business.

   Holders of PPUs earn  interest on aggregate  amounts drawn at the rate of 30%
per annum,  of which 6% is paid and the  remainder  accrued,  but not paid until
July 1, 1995, at which time interest and principal payments due are subordinated
to operating requirements and senior notes debt service but are payable prior to
distributions  to  Limited  Partners.  Principal  amounts  drawn are  payable on
February 1, 1999.  Principal  amounts may be prepaid without penalty on or after
January 1, 1996.

                                      F-16

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY

   The  Company has  authorized  1,000,000  shares of $0.01 par value  preferred
stock.

   Redeemable Preferred Stock

   In June 1994, Orion issued 11,500 shares of Series A 8% Cumulative Redeemable
Convertible  Preferred  Stock at  $1,000  per  share  and  granted  an option to
purchase an  additional  3,833 shares of similar  preferred  stock at $1,000 per
share. Dividends on preferred stock accrue at 8% per year and are payable as and
when declared.  Orion may redeem the preferred stock at the amount invested plus
accrued and unpaid dividends. Upon such a redemption, the preferred stockholders
would  receive a warrant  to  acquire at $8.50 per share the number of shares of
common stock into which the preferred stock was  convertible.  The 11,500 shares
issued are convertible  into 1,352,941 shares of common stock ($8.50 per share).
Upon  conversion  any accrued and unpaid  dividends  would be waived.  Orion may
require  conversion  of the  preferred  stock  beginning in June 1996 if certain
conditions are met.

   The preferred stock has a liquidation preference equal to the amount invested
plus accrued and unpaid dividends.  Preferred  stockholders are entitled to vote
on an  as-converted  basis and have the  right to put the stock to Orion  upon a
merger,  change of control or sale of substantially all assets at the greater of
liquidation  value or fair  value.  The put  expires  upon the  completion  of a
qualified  public equity  offering,  as defined.  If the preferred  stock is not
previously  redeemed or converted to common stock,  the  preferred  stockholders
also have the right to put the stock to Orion as follows:  33 1/3%  beginning in
June 1999; 66 2/3% beginning in June 2000; and 100% beginning in June 2001.

   After Orion issued  preferred  stock (along with warrants and options to make
an  additional  investment)  in June  1994,  the  Directors  and  affiliates  of
Directors who purchased  common stock in December 1993 and the  institutions and
other investors who purchased common stock in June 1994 each exercised its right
to  receive  preferred  stock  (along  with  warrants  and  options  to  make an
additional  investment) in exchange for the common stock previously acquired and
Orion  issued an  aggregate  of 3,000  shares of  Series A  Preferred  Stock and
related options for 1,000 shares to such persons and entities, of which 9 shares
of  preferred  stock were  converted  into  1,058  shares of common  stock.  The
remaining  2,991 shares  issued are  convertible  into 351,882  shares of common
stock and the preferred stock underlying the options are convertible into 98,039
shares of common stock.

   In June 1995, certain Directors, affiliates of Directors, and certain holders
of Series A Preferred  Stock  purchased 4,483 shares of Series B Preferred Stock
for approximately $4.5 million.  This purchase was pursuant to an option granted
in June 1995 to purchase $1 of preferred stock similar to the Series A Preferred
Stock for each $3 of Series A Preferred  Stock  purchased  in June 1994,  except
that such similar  preferred  stock would be convertible at any time with Common
Stock at a price  within a range of $10.20 to $17.00  per share of common  stock
based  upon when the  option is  exercised.  The  Series B  Preferred  Stock has
rights,  designations  and  preferences  substantially  similar  to those of the
Series A Preferred Stock, and is subject to similar  covenants,  except that the
Series B Preferred  Stock is convertible  into 439,510 shares of Common Stock at
an  initial  price  of  $10.20  per  share,  subject  to  certain  anti-dilution
adjustments,  and  purchases  of Series B Preferred  Stock did not result in the
purchaser receiving any rights to purchase additional preferred stock.

   Stockholders' Equity

   In December  1993,  178,097  shares of Common Stock were issued at $10.20 per
share to new and existing shareholders.

   In May 1994,  Orion issued  588,235 shares of common stock at $8.50 per share
to Space Systems Loral pursuant to a stock purchase agreement.

   In May 1994, 19,424 shares of common stock were issued at $10.20 per share to
new and existing shareholders.

                                      F-17

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY-(Continued)

   In June 1994,  Orion issued an aggregate of 174,844 shares of common stock to
a limited  number of  institutions  and other  investors at a purchase  price of
$8.50 per share.

   The December  1993 and June 1994 common  stock  purchases  were  subsequently
converted to redeemable preferred stock.

   Stock Options -- In 1987, Orion adopted a stock option plan. Under this plan,
as amended,  1,470,588  shares of common stock are  reserved  for issuance  upon
exercise of options granted.  Shares of common stock may be purchased under this
plan at prices not less than the fair market  value,  as determined by the Board
of Directors, on the date the option is granted. The Board of Directors also has
granted  nonqualified  options to purchase 53,341 shares of common stock outside
the plan described at prices ranging from $5.44 to $12.24 per share.

   Stock options outstanding at December 31:

<TABLE>
<CAPTION>
                                         1993            1994             1995
                                   --------------- ---------------- ----------------
<S>                                <C>             <C>              <C>
Range of exercise price .........   $5.44 - 15.00    $5.44 - 12.24    $5.44 - 12.24
                                   --------------- ---------------- ----------------
Outstanding at beginning of year      555,581         871,464           804,056
Granted during year .............     374,448          37,867           380,069
Exercised .......................        (165)        (31,967)          (60,928)
Canceled ........................     (58,400)        (73,308)         (151,728)
                                   --------------- ---------------- ----------------
Outstanding at end of year  .....     871,464         804,056           971,469
                                   =============== ================ ================

</TABLE>

   In November  1993,  options for 95,588 shares of common stock were granted to
key  executives  which may be  exercised  only upon the  achievement  of certain
business and financial objectives. In 1995 and 1994, these executives earned the
right to exercise 11,029 and 29,410 of these options based on the achievement of
such objectives.

   The options vest  annually  over a one to five-year  period.  All options are
exercisable  up to seven years from the date of grant.  There are  approximately
499,119 shares  available to be granted under the plan. As of December 31, 1995,
356,226 qualified and nonqualified options were exercisable.

   Stock Warrants -- Orion issued stock warrants to a financial  advisor in 1991
entitling the financial  advisor to purchase  43,049 shares of common stock at a
price of $11.56 a share.  Also,  in 1991,  as an  inducement to Chase to provide
partnership  bridge equity if required,  Orion issued stock  warrants  entitling
Chase to purchase up to 73,529 shares of common stock at $11.56 per share. These
warrants expire in 1996.

   Finally, as an inducement to two limited partners to incur satellite capacity
obligations  required by the senior debt lender,  Orion issued  warrants for the
purchase of an  aggregate  129,757  shares of common  stock at $11.56 per share.
These warrants expire in 1996. See Note 11.

   Warrants  have been  issued,  in  conjunction  with loans to Orion by certain
stockholders and members of executive  management  (since repaid or converted to
common  stock),  to acquire  483,823 shares of Orion's common stock at $11.56 to
$12.92 per share through 1997. The exercise price of these warrants was equal to
or above the fair value of the stock at the time of  issuance;  accordingly,  no
value was allocated to the warrants.  Total warrants outstanding were 553,768 at
December 31, 1995 and 735,769 at December 31, 1994 and 1993.

   The holders of  preferred  stock also hold  warrants  to  purchase  1,704,824
shares of common stock at the conversion  price of such preferred  stock.  These
warrants  do  not  become  exercisable  unless  Orion  exercises  its  right  to
repurchase the preferred stock at the liquidation value, plus accrued and unpaid
dividends.

                                      F-18

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

6. REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY-(Continued)

   The Company has elected to  continue to follow  Accounting  Principles  Board
Opinion No. 25,  "Accounting for Stock Issued to Employees" (APB 25) and related
Interpretations  in  accounting  for its  employee  stock based award  programs,
because the alternative fair value accounting  provided for under FASB Statement
No. 123, "Accounting for Stock Based Compensation" which is effective for awards
after  January 1, 1996  requires  use of option  valuation  models that were not
developed  for use in valuing  employee  stock  options.  Under APB 25, when the
exercise  price of the employee  award equals the market price of the underlying
stock on the date of grant, as has been the case historically with the Company's
awards, no compensation expense is recognized.

7. INVESTMENT IN ASIA PACIFIC

   In January 1990,  Orion entered into an arrangement with Asia Pacific whereby
each  company  exchanged  into escrow  common  shares  having a market  value of
$500,000. In this exchange, Orion received 250,000 shares of Asia Pacific common
stock representing at that time an 11% ownership  interest,  for which it issued
51,061 shares of common stock at a value of $9.79 per share to Asia Pacific. The
assigned value of the Asia Pacific shares received of $500,000 was recorded as a
reduction  to  stockholders'  equity.  In 1992,  the Board of Directors of Orion
authorized the  acquisition of up to 100% of Asia Pacific's  outstanding  common
stock.  As a result of this new  agreement,  the January  1990  transaction  was
rescinded  and the  shares  held  in  escrow  were  returned  to the  respective
companies.  The acquisition of an 83% interest in Asia Pacific was finalized and
executed in  December  1992,  resulting  in the  exchange  of 289,147  shares of
Orion's  common stock for 2,089,392  shares of Asia Pacific  common  stock.  The
acquisition was accounted for as a purchase.
Asia Pacific is a development stage enterprise.

8. FAIR VALUES OF FINANCIAL INSTRUMENTS

   Other  than  amounts  due under the  senior  notes  payable  to banks,  Orion
believes  that the carrying  amount  reported in the balance  sheet of its other
financial assets and liabilities  approximates  their fair value. The fair value
of Orion  Atlantic's  senior  notes  payable to banks at  December  31,  1995 is
estimated to be $235.1 million based on the principal balance  outstanding,  net
of the estimated fair value of the interest rate modification  agreement,  which
approximates  an  implicit  loss of $4.6  million.  Credit  risk  exists  if the
counterparty  is not able to make the  required  payments  to Orion  under these
agreements. Orion believes the risk to be remote.

                                      F-19

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

9. CONDENSED FINANCIAL INFORMATION OF ORION

   As described in Notes 3 and 5, the net assets,  credit  facilities  and other
resources of Orion Atlantic are restricted to the  construction and operation of
the satellite  system.  Presented  below are condensed  balance  sheets of Orion
(parent  company  only  basis)  at  December  31,  1995 and  1994 and  condensed
statements of operations  and cash flows for the years ended  December 31, 1995,
1994 and 1993. All material  contingencies,  obligations and guarantees of Orion
have  been  separately  disclosed  in  the  preceding  notes  to  the  financial
statements.

<TABLE>
<CAPTION>
                                                              DECEMBER 31,
                                                     ------------------------------
                                                          1994            1995
                                                     -------------- ---------------
<S>                                                  <C>            <C>
ASSETS
Current assets:
 Cash and cash equivalents ........................  $ 6,201,941    $ 48,797,627
 Receivable from Orion Atlantic ...................    2,071,547       1,217,169
 Other current assets .............................      215,985         611,391
                                                     -------------- ---------------
  Total current assets.............................    8,489,473      50,626,187
Investment in and advances to subsidiaries:
 OrionNet..........................................    2,477,943       5,993,628
 OrionSat..........................................   (2,793,608)    (20,496,009)
 Asia Pacific .....................................    1,870,508       1,634,048
 Orion Atlantic ...................................    7,800,544      10,585,573
Other assets.......................................    1,710,080       6,256,742
                                                     -------------- ---------------
Total assets.......................................  $19,554,940    $ 54,600,169
                                                     ============== ===============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities: ..............................
 Notes and interest payable to Orion Atlantic .....  $        --    $  2,482,667
 Accounts payable and accrued liabilities..........      860,191       2,361,291
                                                     -------------- ---------------
  Total current liabilities........................      860,191       4,843,958
Notes and interest payable to Orion Atlantic ......           --       2,077,327
Other liabilities..................................      789,485         640,542
Redeemable preferred stock.........................   14,554,693      20,357,701
Stockholders' equity...............................    3,350,571      26,680,642
                                                     -------------- ---------------
Total stockholders' equity.........................  $19,554,940    $ 54,600,169
                                                     ============== ===============
</TABLE>

      CONDENSED STATEMENTS OF OPERATIONS OF ORION NETWORK SYSTEMS, INC.

<TABLE>
<CAPTION>
                                            1993            1994            1995
                                      --------------- --------------- ---------------
<S>                                   <C>             <C>             <C>
Services revenue....................  $        --     $        --     $         --
Costs and expenses: ................
General and administrative..........    2,855,646       2,487,201        4,204,011
Interest expense (income)...........      197,673        (243,152)      (1,834,589)
                                      --------------- --------------- ---------------
Total costs and expenses............    3,053,319       2,244,049        2,369,422
Equity in net losses of
subsidiaries........................    4,832,752       5,720,869       24,545,756
                                      --------------- --------------- ---------------
Net loss............................  $(7,886,071)    $(7,964,918)    $(26,915,178)
                                      =============== =============== ===============

</TABLE>

                                      F-20

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

9. CONDENSED FINANCIAL INFORMATION OF ORION-(Continued)

CONDENSED STATEMENTS OF CASH FLOWS OF ORION NETWORK SYSTEMS, INC.

<TABLE>
<CAPTION>
                                                             1993            1994           1995
                                                       --------------- --------------- --------------
<S>                                                    <C>             <C>             <C>
Net cash used in operations..........................  $(2,319,221)    $(2,709,307)    $(4,107,237)
Investing activities:
 Advances to subsidiaries............................   (1,115,662)     (2,973,264)     (3,264,024)
 Investment in Orion Atlantic........................           --              --      (5,400,000)
 Capital expenditures................................     (106,835)       (771,890)       (597,698)
 Acquisition of Asia Pacific.........................       (2,721)             --              --
                                                       --------------- --------------- --------------
                                                        (1,225,218)     (3,745,154)     (9,261,722)
Financing activities:
Proceeds from issuance of redeemable preferred stock            --      10,928,293       4,483,001
Proceeds from issuance of common stock...............    1,807,345       6,542,303      51,974,436
PPU funding..........................................     (280,000)       (765,000)       (455,000)
Proceeds from issuance of notes payable..............      326,511              --              --
Repayment of notes payable...........................      (46,318)     (5,648,535)        (37,792)
                                                       --------------- --------------- --------------
                                                         1,807,538      11,057,061      55,964,645
                                                       --------------- --------------- --------------
Net increase (decrease) in cash .....................   (1,736,901)      4,602,600      42,595,686
Cash and cash equivalents at beginning of year  .....    3,336,242       1,599,341       6,201,941
                                                       --------------- --------------- --------------
Cash and cash equivalents at end of year ............  $ 1,599,341     $ 6,201,941     $48,797,627
                                                       =============== =============== ==============

</TABLE>
   Basis of presentation  -- In these parent  company-only  condensed  financial
   statements,  Orion's investment in subsidiaries is stated at cost less equity
   in the losses of subsidiaries since date of inception or acquisition.

10. SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

   The  following is a summary of the quarterly  results of  operations  for the
years-ended December 31, 1995 and 1994:

<TABLE>
<CAPTION>
                                 MARCH 31    JUNE 30     SEPTEMBER 30   DECEMBER 31
                               ----------- ----------- --------------- -------------
                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                            <C>         <C>         <C>             <C>
1995
 Revenues ...................  $  2,508    $  5,238    $  6,201        $  8,336
 Loss from operations........   (11,891)    (12,038)    (13,525)         (9,377)
 Loss before minority
  interest...................   (15,978)    (18,248)    (19,186)        (19,592)
 Net loss....................    (5,996)     (6,991)     (6,998)         (6,930)
 Net loss per share..........     (0.64)      (0.75)      (0.78)          (0.67)

1994
 Revenues ...................  $    616    $    718    $    896        $  1,185
 Loss from operations........    (3,211)     (4,233)     (3,651)         (4,636)
 Loss before minority
  interest...................    (3,190)     (4,044)     (3,638)         (4,451)
 Net loss....................    (1,786)     (1,928)     (2,217)         (2,034)
 Net loss per share..........     (0.19)      (0.21)      (0.24)          (0.22)

</TABLE>

                                      F-21

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

11. SUBSEQUENT EVENTS (UNAUDITED)

   In July  1996,  Orion  entered  into an  Exchange  Agreement  (the  "Exchange
Agreement")  with the  Limited  Partners  that  hold 58 1/3% of the  partnership
interests  in Orion  Atlantic.  Pursuant to the Exchange  Agreement,  Orion will
acquire  all of  the  interests  held  by  the  Limited  Partners,  as  well  as
approximately $38 million of Orion Atlantic  indebtedness to Limited Partners in
exchange for a newly issued series of redeemable  convertible preferred stock in
Orion and the  release of certain  credit  support  obligations  of the  Limited
Partners.  The  Exchange  Agreement  is  conditioned  upon a  number  of  events
including,  among other things,  shareholder approval, the British Aerospace and
Matra Marconi  Space  debenture  investments,  the  acquisition  of the minority
interest of Asia Pacific held by British  Aerospace,  and the refinancing of the
Orion 1 Credit Facility, all as described below.

   Orion  intends  to enter  into an  agreement  with an  affiliate  of  British
Aerospace to acquire their 17% outstanding minority interest in Asia Pacific for
approximately 86,000 shares of Orion Common Stock.

   Orion has entered into a Memorandum of Agreement, effective December 6, 1996,
for procurement of Orion 2 spacecraft with Matra Marconi Space with an aggregate
contract value of $200.8 million,  excluding launch  insurance.  On December 13,
1996, OAP entered into an Authorization  to Proceed  Agreement with Hughes Space
and Communications  International for the procurement of Orion 3 spacecraft with
an aggregate contract value, subject to execution of a definitive agreement,  of
$208 million,  excluding launch insurance.  Construction of Orion 3 commenced in
mid-December 1996.

   The Company intends to file a Registration  Statement with the Securities and
Exchange  Commission  pursuant  to  which  the  Company  will  offer  to sell an
aggregate  of $222 million of Units  consisting  of Senior  Notes,  due 2007 and
warrants to purchase  common  stock,  and an  aggregate of $125 million of Units
consisting  of Senior  Discount  Notes due 2007 and warrants to purchase  common
stock (the "Offering").  The proceeds from this offering are intended to be used
primarily  to  refinance  the  Orion 1 Credit  Facility.  Concurrently  with the
Offering,  British  Aerospace and Matra Marconi Space have committed to purchase
$50 million  and $10  million of  convertible  junior  subordinated  debentures,
respectively.  Such  debentures  are expected to bear  interest at 8.75% payable
semiannually  in Orion  common  stock  (valued at up to $14.00 per share)  until
maturity in 2012. The Offering is conditioned on  consummation  of the Exchange,
repayment of the Orion 1 Credit  Facility  with proceeds of the Offering and the
British Aerospace and Matra Marconi Space debenture investments; the Exchange is
conditioned on, among other things,  the Orion 2 Satellite  Contract,  which has
been entered  into,  and approval of the Orion  stockholders,  expected to occur
prior to the  pricing  of the  Offering;  and the  British  Aerospace  debenture
investment is  conditioned  on Orion's  acquisition  of the  remaining  minority
interest in Asia Pacific, which has occurred or is in the process of occurring.

   In November 1996, Orion entered into a contract with DACOM Corp. ("DACOM"), a
Korean  communications  company,  under which  DACOM will lease eight  dedicated
transponders on Orion 3 for 13 years, in return for  approximately  $89 million,
which is payable over a period from December  1996 through six months  following
the lease commencement date for the transponders (which is scheduled to occur by
January  1999).  DACOM is to  deposit  funds  with  Orion in  accordance  with a
milestone schedule. It has the right to terminate the contract at any time prior
to March 31, 1997, upon which  termination Orion would be entitled to retain all
deposited  funds.  Prior to  launch,  payments  will be held in  escrow  and are
subject to refund pending the successful  launch and  commencement of commercial
operation  of Orion 3. In  November  1996,  Orion  granted an option to Dacom to
purchase  50,000  shares of common  stock at a price of $14.00  per  share.  The
warrant is  exercisable  for a six-month  period  beginning six months after the
commencement date, as defined in the Joint Investment Agreement,  and ending one
year after  commencement date and will terminate at that time or at any time the
Joint Investment Agreement is terminated.

                                      F-22

<PAGE>
                        ORION NETWORK SYSTEMS, INC. -
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

11. SUBSEQUENT EVENTS (UNAUDITED)-(Continued)

   In January 1997, Orion issued an aggregate of  approximately 86,500 shares of
Common Stock to British Aerospace,  one of the Company's principal  stockholders
which has a  representative  on the Company's Board of Directors.  Such issuance
was pursuant to the exercise of a warrant granted in December 1991 in connection
with the formation of Orion Atlantic.

   Litigation. In connection with the Skydata suit discussed in Note 4, on March
5, 1996,  the court granted the  Company's  motion to dismiss the lawsuit on the
basis that Skydata's  claims are subject to  arbitration.  Skydata  appealed the
dismissal to the United States Court of Appeals to the Federal Circuit.  Skydata
also filed a counterclaim in the arbitration  proceedings  asserting a claim for
$2 million  damages as a result of the conduct of Orion and its  affiliates.  On
May 15, 1996, the arbitrator  granted the Orion parties'  request for an initial
hearing on claims relating to the Orion parties' rights to the patent, including
the co-ownership  claim and other contractual  claims.  This initial hearing was
scheduled to take place in November 1996. On November 9, 1996, Orion and Skydata
executed a letter to settle in full the pending  litigation and arbitration.  As
part of the  settlement,  the  parties  are to release all claims by either side
relating in any way to the patent and/or the pending litigation and arbitration.
In  addition,  Skydata is to grant Orion (and its  affiliates)  an  unrestricted
paid-up  license to make,  have made,  use or sell products or methods under the
patent and all other corresponding continuation and reissue patents. Orion is to
pay Skydata  $437,000 over a period of two years as part of the settlement.  The
parties  are in the  process of  documenting  the terms of the  settlement  in a
formal settlement agreement.

                                      F-23
<PAGE>

                                   GLOSSARY

ORION, ITS PARTNERS AND CREDITORS:


Banks                         A  syndicate  of  international   banks  that  are
                              parties to the Orion 1 Credit Facility.

British Aerospace             British  Aerospace Public Limited Company,  one of
                              the world's leading aerospace  organizations,  and
                              its affiliates,  including its subsidiary  British
                              Aerospace Communications, Inc., a Limited Partner.
                              Kingston  Satellite  Services,   a  joint  venture
                              between   Kingston   Communications   and  British
                              Aerospace,  serves  as  sales  representative  and
                              ground  operator for Orion in the United  Kingdom.

COM DEV                       COM  DEV  Satellite   Communications   Limited,  a
                              Limited  Partner  and a  subsidiary  of  COM  DEV,
                              Limited.  COM DEV,  Limited is also a supplier  of
                              value-added  satellite   communications  services,
                              products for wireless personal  communications and
                              satellite remote sensing data.

GECC                          General Electric Capital  Corporation,  the lender
                              for the TT&C Financing.

Kingston Communications       Kingston  Communications  International Limited, a
                              Limited  Partner  and  a  subsidiary  of  Kingston
                              Communications     (Hull)     plc,     the    only
                              municipally-owned  telephone company in the United
                              Kingdom.  Kingston  Satellite  Services,  a  joint
                              venture  between   Kingston   Communications   and
                              British Aerospace,  serves as sales representative
                              and  ground  operator  for  Orion  in  the  United
                              Kingdom.

Limited Partners              The limited partners in Orion Atlantic,  including
                              British Aerospace  Communications,  Inc., COM DEV,
                              Kingston Communications,  Lockheed Martin CLS, MCN
                              Sat US, Inc. and Trans-Atlantic Satellite, Inc.

Lockheed Martin               Lockheed Martin Corporation,  a major manufacturer
                              of  aerospace  and  military  equipment,  and  the
                              ultimate  parent company of Lockheed Martin CLS, a
                              Limited Partner and the launch subcontractor under
                              the Orion 1 Satellite  Contract.  Lockheed  Martin
                              CLS  acquired  the  assets  of  General   Dynamics
                              Commercial  Launch Services  through a transfer of
                              assets from Martin Marietta Corporation,  which in
                              turn  acquired  these and other assets  (including
                              the Atlas family of launch  vehicles) from General
                              Dynamics Corporation in 1994.

Lockheed Martin CLS           Lockheed Martin Commercial Launch Services,  Inc.,
                              a  Limited  Partner  and a  subsidiary  of  Martin
                              Marietta  Technologies,  Inc.,  a Lockheed  Martin
                              company.  Lockheed  Martin CLS acquired the assets
                              of General  Dynamics  Commercial  Launch  Services
                              through a transfer of assets from Martin  Marietta
                              Corporation,  which  in turn  acquired  these  and
                              other assets (including the Atlas family of launch
                              vehicles)  from General  Dynamics  Corporation  in
                              1994.  Lockheed Martin CLS is a commercial  launch
                              services  provider and provided launch services to
                              Orion as the launch  subcontractor under the Orion
                              1 Satellite Contract. Lockheed Martin CLS became a
                              Limited   Partner   by   acquiring   the   limited
                              partnership  interest of General  Dynamics  CLS in
                              the 1994 transaction described above.

                                       G-1

<PAGE>

Matra Hachette                Matra Hachette, an aerospace,  defense, industrial
                              and media company and part of the Lagardere Groupe
                              of France,  and the parent  company of MCN Sat US,
                              Inc., a Limited Partner.  Matra Hachette is one of
                              the parent  companies of Matra Marconi Space which
                              is the parent  company of MMS Space  Systems,  the
                              prime contractor for Orion 1, and the manufacturer
                              under the Orion 2 Satellite Contract.

Nissho Iwai Corp              Nissho Iwai  Corporation,  is a trading company in
                              Japan,  and the parent  company of  Trans-Atlantic
                              Satellite, Inc., a Limited Partner.

Orion                         (1)  the  combined  operations  of  Orion  Network
                              Systems,  Inc.,  a Delaware  corporation,  and its
                              subsidiaries    (collectively,    the   "Operating
                              Company"),  prior to the date of the  merger  of a
                              newly formed  subsidiary  ("Merger  Sub") of Orion
                              Newco  Services,  Inc., a recently formed Delaware
                              corporation  ("Orion  Newco"),  into the Operating
                              Company  (the  "Merger")  and  (2)  Orion  and its
                              subsidiaries,  including  the  Operating  Company,
                              after the Merger.

Orion 1 Credit Facility       A facility  of up to $251  million of senior  debt
                              provided to finance  Orion 1, which will be repaid
                              with proceeds of the Notes Offering.

Orion Asia Pacific            Asia  Pacific  Space and  Communications,  Ltd., a
                              Delaware  corporation.  Orion  acquired 83% of the
                              stock of such  company in  December  1992 and will
                              acquire  the  remaining  17%,  which  is  held  by
                              British  Aerospace,  in exchange for approximately
                              86,000   shares  of   Common   Stock  in  the  OAP
                              Acquisition.

Orion Atlantic                International Private Satellite Partners,  L.P., a
                              Delaware limited  partnership of which OrionSat is
                              the general partner, which owns Orion 1.

OrionNet                      OrionNet,  Inc., a Delaware corporation and wholly
                              owned subsidiary of Orion.

OrionSat                      Orion    Satellite    Corporation,    a   Delaware
                              corporation and wholly owned subsidiary of Orion.

Partners                      The  partners  in Orion  Atlantic,  consisting  of
                              OrionSat,  as the general partner, and the Limited
                              Partners (including Orion).

Partnership Agreement         The  limited   partnership   agreement   of  Orion
                              Atlantic,  which includes the terms and conditions
                              governing the partnership  arrangements  among the
                              Partners.

STET                          STET-Societa Finanziaria  Telefonica-per Azioni is
                              a former Limited Partner and the parent company of
                              Telecom Italia, the Italian PTT.

STET Redemption               The  redemption  on  November  21,  1995 by  Orion
                              Atlantic of the limited partnership  interest held
                              by STET  and  modification  of  STET's  previously
                              existing   contractual   arrangements  with  Orion
                              Atlantic.

TT&C Financing                A facility of up to $11  million  provided by GECC
                              for Orion's TT&C  facility that was converted to a
                              seven-year term loan on June 1, 1995 and which had
                              an  outstanding  balance  of  $7.2  million  as of
                              September 30, 1996. 

                                       G-2

<PAGE>
SATELLITE CONSTRUCTION AND SATELLITE COMMUNICATIONS:

bandwidth                     The  relative  range  of  frequencies  that can be
                              passed  through  a  transmission   medium  without
                              distortion. The greater the bandwidth, the greater
                              the information  carrying  capacity.  Bandwidth is
                              measured in Hertz.

C-band                        Certain  high  frequency   radio  frequency  bands
                              between 3,400 to 6,725 MHz used by  communications
                              satellites.

constructive total loss       If  a  satellite   is   completely   destroyed  or
                              incapable   of   operation   (except  for  certain
                              failures due to  circumstances  beyond the control
                              of the manufacturer)  during a specified number of
                              days after launch.

footprint                     Signal coverage area for a satellite.

Hertz                         The unit for measuring the frequency with which an
                              electromagnetic    signal   cycles   through   the
                              zero-value  state  between  the lowest and highest
                              states.  One Hertz  (abbreviated as Hz) equals one
                              cycle  per  second;  kHz  (kiloHertz)  stands  for
                              thousands  of Hertz;  MHz  (megaHertz)  stands for
                              millions of Hertz.

Hughes Space                  Hughes  Space  and  Communications  International,
                              Inc., the manufacturer under the Orion 3 Satellite
                              Contract.  Hughes Space is a subsidiary  of Hughes
                              Aircraft Company, which is a subsidiary of General
                              Motors Corporation.

Ku-band                       Certain  high  frequency   radio  frequency  bands
                              between 10,700 to 14,500 MHz permitting the use of
                              smaller antennae than the older C-band technology.

Matra Marconi Space           Matra  Marconi  Space  UK   Limited,   the  parent
                              company of MMS Space  Systems and a subsidiary  of
                              Matra Marconi Space NV, and the manufacturer under
                              the  Orion 2  Satellite  Contract.  Matra  Marconi
                              Space NV is owned by Matra  Hachette  (51 percent)
                              and General Electric Co. of Britain (49 percent).

Orion 1                       The high-power  Ku-band  communications  satellite
                              operated   over  the   Atlantic   Ocean  by  Orion
                              Atlantic.

Orion 1 Satellite Contract    The  fixed  price  turnkey   contract   originally
                              entered into between  British  Aerospace and Orion
                              Atlantic for the design, construction,  launch and
                              delivery  in orbit of Orion 1.  British  Aerospace
                              assigned  its  rights  under the  contract  to MMS
                              Space Systems, which was subsequently purchased by
                              Matra  Marconi  Space  NV and  renamed  MMS  Space
                              Systems Limited.  British Aerospace remains liable
                              to  Orion  Atlantic  for  the  performance  of the
                              contract but  performance has been assigned to MMS
                              Space Systems and the Company understands that MMS
                              Space  Systems  and  Matra  Marconi  Space NV have
                              fully   indemnified   British   Aerospace  against
                              liabilities thereunder.

Orion 2                       The high-power Ku-band communications satellite to
                              be operated over the Atlantic Ocean by Orion.


Orion 2 Satellite Contract    The spacecraft  purchase  agreement  between Orion
                              Atlantic and Matra Marconi Space for  construction
                              and launch of Orion 2.

Orion 3                       The high-power Ku-band communications satellite to
                              be operated by Orion in the Asia Pacific region.

                                       G-3

<PAGE>
Orion 3 Satellite Contract    The proposed spacecraft purchase agreement between
                              Orion Asia Pacific,  a wholly owned  subsidiary of
                              Orion,  and  Hughes  Space  for  construction  and
                              launch of Orion 3.

Space Systems or MMS Space 
  Systems                     MMS Space Systems Limited,  a former subsidiary of
                              British  Aerospace which was sold to Matra Marconi
                              Space NV, in 1994. Matra Marconi Space NV is owned
                              by  Matra   Hachette   (51  percent)  and  General
                              Electric  Co. of Britain (49  percent).  MMS Space
                              Systems served as the prime  contractor  under the
                              Orion 1 Satellite Contract.

transponder                   The  part of a  satellite  which  is used  for the
                              reception of  communication  signals from, and the
                              frequency     conversion,     amplification    and
                              transmission to, earth.

TT&C Station                  A  satellite  control  system,  which  includes  a
                              satellite control center and a tracking, telemetry
                              and  command   station  complex  at  Mt.  Jackson,
                              Virginia.

VSAT                          Very small  aperture  terminal earth stations that
                              can be  installed  on  rooftops  or  elsewhere  at
                              customer locations,  with antennas as small as 0.8
                              meters  but  ranging  in sizes up to 2.4 meters in
                              diameter.

REGULATION AND COMPETITION:

Communications Act            The U.S. Communications Act of 1934, as amended.

EUTELSAT                      European regional satellite facilities  consortium
                              owned by approximately 40 European countries.

FCC                           The   United   States    Federal    Communications
                              Commission.

INTELSAT                      International     Telecommunications     Satellite
                              Organization,     an    international    satellite
                              facilities  consortium owned by approximately  130
                              government and privately owned  telecommunications
                              companies.  References to INTELSAT are intended to
                              include the signatories thereof unless the context
                              otherwise requires.

ITU                           International    Telecommunication    Union,    an
                              international   body  formed  by  treaty  that  is
                              responsible  for   coordinating   and  registering
                              orbital slots to satellites.

Orion 1 License               The  license  granted  to  Orion  by  the  FCC  to
                              construct,   launch  and   operate   Orion  1,  at
                              designated orbital location 37.5' West longitude
                              over the Atlantic Ocean.

PanAmSat                      Pan  American  Satellite  Corporation,  a publicly
                              traded  U.S.  company   providing   trans-Atlantic
                              satellite  service and services to Latin  America,
                              the Pacific  Ocean  region,  and the Indian  Ocean
                              region,  using a satellite  system  separate  from
                              INTELSAT.

PTT                           Postal,   telephone  and  telegraph  organization,
                              ordinarily   a   government-owned   communications
                              monopoly.

                                       G-4

<PAGE>




                                                                  ATTACHMENT A


                         AGREEMENT AND PLAN OF MERGER
                                      OF
                      ORION MERGER COMPANY, INC. ("SUB")
                                WITH AND INTO
                     ORION NETWORK SYSTEMS, INC. ("ONS"),
                             AMONG SUB, ONS, AND
                          ORION NEWCO SERVICES, INC.



<PAGE>

   THIS AGREEMENT AND PLAN OF MERGER (the  "Agreement") is made and entered into
as of the 8th day of January,  1997, by and among ORION NETWORK SYSTEMS, INC., a
Delaware  corporation  ("ONS,"  or, with regard to the period upon and after the
Effective  Time  of  the  Merger  (as  hereinafter   defined),   the  "Surviving
Corporation"),  ORION NEWCO SERVICES,  INC., a Delaware  corporation  ("Newco"),
which is a direct  wholly-owned  subsidiary  of ONS, and ORION  MERGER  COMPANY,
INC., a Delaware corporation ("Sub"), which is a direct wholly-owned  subsidiary
of  Newco  and  an  indirect  wholly-owned  subsidiary  of  ONS  (ONS  and  Sub,
collectively,   the  "Constituent   Corporations,"   and  each,  a  "Constituent
Corporation").

                               R E C I T A L S

   A.  WHEREAS,  ONS is a corporation  organized and existing  under the General
Corporation  Law of the State of Delaware  (the  "DGCL"),  and is  authorized to
issue a total of  Forty-One  Million  (41,000,000)  shares of stock,  in two (2)
classes,  the first class  consisting  of Forty Million  (40,000,000)  shares of
common stock, $.01 par value per share (the "ONS Common Stock"), of which, as of
December 15, 1996,  Ten Million Nine Hundred  Seventy-Four  Thousand One Hundred
and Twenty-One  (10,974,121)  shares are issued and outstanding (such shares or,
as the  context  may  require,  such  lesser or greater  number of shares of ONS
Common Stock as may be issued and outstanding immediately prior to the Effective
Time of the Merger,  the  "Outstanding ONS Common Shares") (with, as of December
15, 1996,  an  additional  Three  Million One Hundred  Ninety-Six  Thousand Nine
Hundred and  Seventy-Six  (3,196,976)  shares of ONS Common Stock being issuable
upon conversion of the Outstanding ONS Series A Preferred Shares (as hereinafter
defined)  and the  Outstanding  ONS Series B  Preferred  Shares (as  hereinafter
defined) and upon the  exercise of rights under the ONS Options (as  hereinafter
defined)  and  the ONS  Warrants  (as  hereinafter  defined))  and  Two  Hundred
Fifty-Nine Thousand Five Hundred and Fifteen (259,515) shares are issued but not
outstanding  (such shares or, as the context may reqire,  such lesser or greater
number of  shares  of ONS  Common  Stock as may be  issued  but not  outstanding
immediately prior to the Effective Time of the Merger,  the "Treasury ONS Common
Shares"),  and the second class consisting of One Million  (1,000,000) shares of
preferred stock, $.01 par value per share (the "ONS Preferred Stock"),  of which
Fifteen  Thousand  (15,000)  shares  constitute a series of ONS Preferred  Stock
having the designation "Series A 8% Cumulative Redeemable  Convertible Preferred
Stock"  (the "ONS Series A  Preferred  Stock") (of which  shares of ONS Series A
Preferred  Stock Thirteen  Thousand Eight Hundred and  Seventy-One  (13,871) are
issued and  outstanding  as of December 15, 1996 (such shares or, as the context
may require,  such lesser or greater  number of shares of ONS Series A Preferred
Stock as may be issued and outstanding  immediately  prior to the Effective Time
of the Merger, the "Outstanding ONS Series A Preferred  Shares")),  and of which
Five Thousand  (5,000) shares  constitute a series of ONS Preferred Stock having
the designation "Series B 8% Cumulative Redeemable  Convertible Preferred Stock"
(the "ONS Series B Preferred  Stock") (of which shares of ONS Series B Preferred
Stock  Four  Thousand  Two  Hundred  and  Ninety-Eight  (4,298)  are  issued and
outstanding  as December  15, 1996 (such  shares or, as the context may require,
such lesser or greater  number of shares of ONS Series B Preferred  Stock as may
be issued and outstanding immediately prior to the Effective Time of the Merger,
the  "Outstanding  ONS  Series  B  Preferred  Shares,"  and  together  with  the
Outstanding  ONS Series A  Preferred  Shares,  the  "Outstanding  ONS  Preferred
Shares")).

   B. WHEREAS,  Sub is a corporation  organized and existing under the DGCL, and
is authorized to issue a total of One Thousand (1,000) shares, in a single class
of common stock, $.01 par value per share (the "Sub Common Stock"), of which, as
of the date hereof,  one (1) share is issued and outstanding  (the  "Outstanding
Sub  Common  Share")  (as of the  date  hereof,  Newco  holding  of  record  the
Outstanding Sub Common Share) and no shares are issued but not outstanding.

   C. WHEREAS, Newco is a corporation organized and existing under the DGCL, and
is  authorized  to issue a total of  Forty-One  Million  (41,000,000)  shares of
stock,  in two  (2)  classes,  the  first  class  consisting  of  Forty  Million
(40,000,000) shares of common stock, $.01 par value per share (the "Newco Common
Stock"),  of  which,  as of the  date  hereof,  one  (1)  share  is  issued  and
outstanding (the "Outstanding  Newco Common Share") (as of the date hereof,  ONS
holding of record the  Outstanding  Newco Common Share) and no shares are issued
but not outstanding,  and the second class consisting of One Million (1,000,000)
shares of  preferred  stock,  $.01 par value per  share  (the  "Newco  Preferred
Stock"), of


                                       A-2

<PAGE>
which Fifteen  Thousand  (15,000)  shares  constitute or, prior to the Effective
Time of the Merger will constitute, a series of Newco Preferred Stock having the
designation "Series A 8% Cumulative Redeemable Convertible Preferred Stock" (the
"Newco  Series A  Preferred  Stock")  (none of which  shares  of Newco  Series A
Preferred Stock are issued and outstanding as of the date hereof),  and of which
Five Thousand  (5,000) shares  constitute or, prior to the Effective Time of the
Merger will constitute, a series of Newco Preferred Stock having the designation
"Series B 8%  Cumulative  Redeemable  Convertible  Preferred  Stock" (the "Newco
Series B Preferred  Stock")  (none of which  shares of Newco  Series B Preferred
Stock are issued and outstanding as of the date hereof).

   D. WHEREAS,  the  respective  Boards of Directors of ONS, Sub, and Newco have
determined  that it is advisable and in the best  interests of each of ONS, Sub,
and Newco and their respective stockholders that Sub be merged with and into ONS
in accordance  with the terms and conditions of this  Agreement (the  "Merger"),
and  accordingly  the  Board of  Directors  of each of ONS,  Sub,  and Newco has
adopted, approved, and authorized this Agreement and the Merger.

   E. WHEREAS, it is contemplated that the Merger will be effected in accordance
with  Section  251(g) of the DGCL,  and it is  expected  that  Ernst & Young LLP
("Ernst  &  Young"),  tax  advisor  to ONS,  will  render an  opinion  (the "Tax
Opinion")  that the  holders of shares of ONS stock which are  converted  in the
Merger into the right to receive shares of Newco stock will have the opportunity
to qualify for  nonrecognition  treatment because the Merger will qualify either
as (a) a reorganization  pursuant to Section 368(a) of the Internal Revenue Code
of 1986, as amended (the "Code"), or (b) an exchange satisfying the requirements
of Section 351(a) of the Code.

   F. WHEREAS, ONS, Orion Satellite  Corporation,  a Delaware  corporation,  and
each  of the  existing  limited  partners  (other  than  ONS)  (the  "Exchanging
Partners") of International Private Satellite Partners, L.P., a Delaware limited
partnership  ("Orion  Atlantic"),  have  entered  into a  Section  351  Exchange
Agreement  and Plan of  Conversion,  dated  as of June  1996  (as  amended,  the
"Exchange Agreement"),  pursuant to which ONS has agreed, among other things, to
have  Newco  issue  shares  of a series  of Newco  Preferred  Stock  having  the
designation "Series C 6% Cumulative Redeemable Convertible Preferred Stock" (the
"Newco  Series C Preferred  Stock"),  in exchange for the  Exchanging  Partners'
respective  limited  partnership  interests  in Orion  Atlantic and other rights
relating thereto (the "Exchange").

   NOW,  THEREFORE,  in  consideration of the premises,  the mutual  agreements,
promises, covenants,  representations,  warranties,  acknowledgments,  and other
terms, conditions,  and provisions set forth herein, and other good and valuable
consideration, the sufficiency and receipt of which are hereby acknowledged, the
parties agree as follows:

                                  ARTICLE I
                                  THE MERGER

   1.1 The Merger;  Filing and Effective Time. Subject to and in accordance with
the terms and conditions of this Agreement and the DGCL, a certificate of merger
regarding  the  Merger  of  Sub  with  and  into  ONS  (the   "Delaware   Merger
Certificate") shall be executed,  acknowledged,  and filed with the Secretary of
State of the State of  Delaware  (the  "Delaware  Secretary  of  State")  by the
Surviving  Corporation  at or as soon  as  practicable  after  the  Closing  (as
hereinafter defined).  The Merger shall become effective upon such filing of the
Delaware Merger Certificate (the "Effective Time of the Merger").

   1.2 Closing.  Subject to and in accordance  with the terms and  conditions of
this Agreement,  the closing of the Merger (the  "Closing")  shall take place as
soon as practicable after  satisfaction of the latest to occur of the conditions
set forth in Article V hereof (the  "Closing  Date"),  at the offices of Hogan &
Hartson L.L.P., Columbia Square, 555 13th Street, N.W., Washington,  D.C. 20004,
unless another date or place is agreed to in writing by the parties hereto.

   1.3 Effect of the Merger. Upon the Effective Time of the Merger, the separate
existence  of Sub shall  cease and Sub  shall be merged  with and into ONS.  ONS
shall  survive the Merger,  and the separate  corporate  existence of ONS as the
Surviving  Corporation  shall continue  unaffected and unimpaired by the Merger.
Upon and after the Effective Time of the Merger, the rights, privileges, powers,
and fran-

                                       A-3
<PAGE>
chises of each of the Constituent  Corporations,  and all property  belonging to
each  of  such  Constituent  Corporations,  shall  be  vested  in the  Surviving
Corporation,  but all rights of creditors and all liens upon any property of any
of the Constituent  Corporations shall be preserved  unimpaired,  and all debts,
liabilities,  and  duties  of  the  respective  Constituent  Corporations  shall
thenceforth attach to the Surviving Corporation,  and may be enforced against it
to the same extent as if such debts,  liabilities,  and duties had been incurred
or contracted by the Surviving Corporation, all as more fully provided under the
DGCL.

   1.4  Certificate  of   Incorporation  of  the  Surviving   Corporation.   The
Certificate  of  Incorporation  of ONS as in  effect  immediately  prior  to the
Effective  Time of the Merger (the "ONS  Charter")  shall be the  certificate of
incorporation  of  the  Surviving   Corporation   (the  "Surviving   Corporation
Charter"),  except that the following  amendments  thereto are to be effected by
the Merger upon the Effective Time of the Merger:

   (a) the Surviving  Corporation  Charter is to be amended by striking  Article
FIRST thereof in its entirety and inserting in lieu thereof the following:

     "FIRST:  The  name  of  the  Corporation  is  Orion  Oldco  Services,  Inc.
(hereinafter called the 'Corporation').";

   (b)  the  Surviving  Corporation  Charter  is to be  amended  by  adding  and
inserting,  immediately  following  Article  THIRTEENTH  thereof,  a new Article
FOURTEENTH thereof, to read in its entirety as follows:

   "FOURTEENTH:  Any act or  transaction  by or involving the  Corporation  that
requires  for its  adoption  under the General  Corporation  Law of the State of
Delaware (the 'DGCL') or this Certificate of  Incorporation  the approval of the
stockholders of the Corporation shall, pursuant to subsection (g) of Section 251
of the DGCL,  require,  in addition,  the approval of the  stockholders of Orion
Newco Services,  Inc., a Delaware  corporation (the name of which is expected to
be  changed to 'Orion  Network  Systems,  Inc.'),  or any  successor  thereto by
merger,  by the same vote as is required by the DGCL and/or by this  Certificate
of Incorporation."; and

   (c) the Surviving  Corporation  Charter  is to be  amended  by the  Surviving
Corporation's  certification,  in  accordance  with Section 243 of the DGCL (the
"Paragraph  (c)   Certification"),   that:  (i)  that  certain  "Certificate  of
Designations,  Rights  and  Preferences  of  Series A 8%  Cumulative  Redeemable
Convertible  Preferred Stock" of ONS, filed with the Delaware Secretary of State
on June 17, 1994 (the "Series A  Certificate  of  Designations")  prohibits  the
reissuance,  as  part  of  such  series  of  Preferred  Stock  of the  Surviving
Corporation,  of shares of Series A Preferred Stock of the Surviving Corporation
that have been retired;  and (ii) a number of shares of Series A Preferred Stock
of the Surviving  Corporation  equal to the number of  Outstanding  ONS Series A
Preferred Shares immediately prior to the Effective Time of the Merger have been
retired; and

   (d) the  Surviving  Corporation  Charter  is  to  be  amended to increase and
restore  to 15,000  the  number of shares of Series A  Preferred  Stock that the
Surviving  Corporation is authorized to issue (such number of authorized  shares
of Series A Preferred Stock of the Surviving  Corporation having been reduced by
the Paragraph (c) Certification,  in accordance with the Series A Certificate of
Designations  and  Section  243 of  the  DGCL,  as a  result  of  the  aforesaid
retirement of shares of Series A Preferred Stock of the Surviving  Corporation),
by striking  the number  (which is less than 15,000) that appears in the one (1)
paragraph  resolution  appearing  at the top of the second  page of the Series A
Certificate of Designations  (the "Series A Resolution") (to the extent that the
number  "15,000" in the Series A Resolution  shall have been amended and changed
to such  lesser  number by  virtue  of the  Paragraph  (c)  Certification),  and
inserting the number "15,000" in lieu thereof; and

   (e) the  Surviving  Corporation  Charter is to be  amended  by the  Surviving
Corporation's  certification,  in  accordance  with Section 243 of the DGCL (the
"Paragraph  (e)   Certification"),   that:  (i)  that  certain  "Certificate  of
Designations,  Rights  and  Preferences  of  Series B 8%  Cumulative  Redeemable
Convertible  Preferred Stock" of ONS, filed with the Delaware Secretary of State
on June 16, 1995 (the "Series B  Certificate  of  Designations")  prohibits  the
reissuance, as part of such series


                                       A-4

<PAGE>
of Preferred Stock of the Surviving Corporation, of shares of Series B Preferred
Stock of the Surviving  Corporation that have been retired; and (ii) a number of
shares of Series B Preferred  Stock of the  Surviving  Corporation  equal to the
number of Outstanding  ONS Series B Preferred  Shares  immediately  prior to the
Effective Time of the Merger have been retired; and

   (f) the  Surviving  Corporation  Charter  is to be amended  to  increase  and
restore  to 5,000 the  number of shares  of Series B  Preferred  Stock  that the
Surviving  Corporation is authorized to issue (such number of authorized  shares
of Series B Preferred Stock of the Surviving  Corporation having been reduced by
the Paragraph (e) Certification,  in accordance with the Series B Certificate of
Designations  and  Section  243 of  the  DGCL,  as a  result  of  the  aforesaid
retirement of shares of Series B Preferred Stock of the Surviving  Corporation),
by striking  the number  (which is less than 5,000) that  appears in the one (1)
paragraph  resolution  beginning at the bottom of the first page of the Series B
Certificate  of  Designations  and carrying over to the second page thereof (the
"Series B  Resolution")  (to the extent that the number  "5,000" in the Series B
Resolution  shall have been amended and changed to such lesser  number by virtue
of the Paragraph (e)  Certification),  and inserting the number  "5,000" in lieu
thereof.

   The Surviving Corporation Charter, as so amended, shall be the certificate of
incorporation of the Surviving  Corporation upon and after the Effective Time of
the Merger, unless and until duly amended,  altered,  changed,  repealed, and/or
supplemented in accordance with the DGCL (which power and right to amend, alter,
change,  repeal, and/or supplement,  at any time and from time to time after the
Effective Time of the Merger, are hereby expressly reserved).

   1.5  Bylaws  of the  Surviving  Corporation.  The  bylaws of ONS as in effect
immediately  prior to the Effective  Time of the Merger (the "ONS Bylaws") shall
be and  continue  in full  force  and  effect  as the  bylaws  of the  Surviving
Corporation  upon and after the Effective  Time of the Merger,  unless and until
duly amended, altered, changed, repealed, and/or supplemented in accordance with
the DGCL  (which  power  and  right to  amend,  alter,  change,  repeal,  and/or
supplement,  at any time and from time to time after the  Effective  Time of the
Merger, are hereby expressly reserved).

   1.6 Directors of the Surviving Corporation. The respective numbers of members
constituting  the  whole  Board  of  Directors  of ONS and  each  class  thereof
immediately  prior to the Effective  Time of the Merger shall be and continue as
the respective  numbers of members  constituting the whole Board of Directors of
the  Surviving  Corporation  and each class thereof upon and after the Effective
Time of the Merger,  unless and until duly  increased or decreased in accordance
with the DGCL (which  power and right to increase or  decrease,  at any time and
from time to time after the Effective Time of the Merger,  are hereby  expressly
reserved). Each person serving as a member of a particular class of the Board of
Directors of ONS (the "ONS Board")  immediately  prior to the Effective  Time of
the Merger  shall be and  continue as a member of the same class of the Board of
Directors of the Surviving  Corporation upon and after the Effective Time of the
Merger,  until such  person's  successor is elected and  qualified or until such
person's earlier death, resignation,  disqualification,  or removal (which power
and right to remove are hereby expressly reserved).

   1.7 Officers of the Surviving Corporation.  Each person serving as an officer
of ONS  immediately  prior  to the  Effective  Time of the  Merger  shall be and
continue as an officer of the Surviving Corporation,  holding the same office or
offices,  upon and after the Effective  Time of the Merger,  until such person's
successor  is appointed  and  qualified or until such  person's  earlier  death,
resignation,  disqualification,  or removal (which power and right to remove are
hereby expressly reserved).

   1.8 Further Assurances.  At any time and from time to time upon and after the
Effective  Time of the Merger,  as and when required or deemed  desirable by the
Surviving  Corporation  or its  successors or assigns,  there shall be executed,
acknowledged,  certified, sealed, delivered, filed, and/or recorded, in the name
and on behalf of any and each Constituent  Corporation,  such deeds,  contracts,
consents, certificates,  notices, and other documents and instruments, and there
shall be done or taken or caused to be done or taken,  in the name and on behalf
of any and each  Constituent  Corporation,  such  further  and other  things and
actions as shall be appropriate,  necessary, or convenient to acknowledge, vest,
effect,  perfect,   conform  of  record,  or  otherwise  confirm  the  Surviving
Corporation's (or its successors' or as-

                                       A-5

<PAGE>
signs')  right,  title,  and  interest  in and to,  and  possession  of, all the
property, interests, assets, rights, privileges, immunities, powers, franchises,
and authority of each  Constituent  Corporation  held  immediately  prior to the
Effective  Time of the Merger,  and otherwise to carry out and effect the intent
and purposes of this Agreement and the Merger. The officers and directors of the
Surviving Corporation (or its successors or assigns), and each of them, upon and
after the Effective Time of the Merger,  are and shall be fully  authorized,  in
the name and on behalf of each Constituent Corporation, to do and take and cause
to be done and  taken  any and all such  things  and  actions,  and to  execute,
acknowledge, certify, seal, deliver, file, and/or record any and all such deeds,
contracts, consents, certificates, notices, and other documents and instruments.

                                  ARTICLE II
                           EFFECT OF THE MERGER ON
              THE CAPITAL STOCK OF THE CONSTITUENT CORPORATIONS

   2.1 Effect on Capital Stock. Upon and as of the Effective Time of the Merger,
by virtue of the  Merger  and  without  any  action on the part of either of the
Constituent  Corporations or Newco, the holders of the respective shares, or any
other person:

   (a) Conversion of ONS Shares.

   (i) Each of the  Outstanding  ONS Common  Shares and each of the Treasury ONS
Common Shares shall be changed and  converted  into the right to receive one (1)
validly issued,  fully paid, and nonassessable share of Newco Common Stock (such
right to be  exercised  and  deemed to have  been  exercised  by the  respective
holders of such  Outstanding ONS Common Shares and by ONS as to the Treasury ONS
Common Shares,  and such shares of Newco Common Stock to be issued and deemed to
have been  issued by Newco,  automatically  and  immediately  upon and as of the
Effective  Time of the  Merger);  such  Outstanding  ONS Common  Shares shall no
longer be outstanding  and such  Outstanding ONS Common Shares and such Treasury
ONS  Common  Shares  automatically  shall be  retired  and  resume the status of
authorized and unissued shares of Common Stock of the Surviving Corporation; the
capital of the  Surviving  Corporation  shall be reduced as permitted  under the
DGCL  by an  amount  equal  to  the  capital  theretofore  represented  by  such
Outstanding  ONS Common  Shares and such  Treasury  ONS Common  Shares;  and the
capital of Newco in respect of such  shares of Newco  Common  Stock  shall be an
amount equal to the aggregate par value thereof.

   (ii) Each of the Outstanding  ONS Series A Preferred  Shares shall be changed
and converted into the right to receive one (1) validly issued,  fully paid, and
nonassessable  share  of  Newco  Series  A  Preferred  Stock  (such  right to be
exercised and deemed to have been  exercised by the  respective  holders of such
Outstanding  ONS Series A Preferred  Shares,  and such shares of Newco  Series A
Preferred  Stock  to be  issued  and  deemed  to  have  been  issued  by  Newco,
automatically  and immediately  upon and as of the Effective Time of the Merger;
with rights to accrued,  accumulated,  and unpaid  dividends on each Outstanding
ONS  Series A  Preferred  Share (the  "Series A  Accumulated  Dividends")  being
preserved,  unimpaired,  unchanged,  and  unaffected by such  conversion and the
Merger, such Series A Accumulated  Dividends carrying over and pertaining to and
being  accrued,  accumulated,  and unpaid  dividends on each such share of Newco
Series A Preferred  Stock, and each such share of Newco Series A Preferred Stock
carrying and having such Series A Accumulated Dividends as accrued, accumulated,
and unpaid  dividends  thereon,  notwithstanding  that such dividends shall have
accrued  and  accumulated  from a date prior to the  issuance  of such shares of
Newco Series A Preferred Stock);  such Outstanding ONS Series A Preferred Shares
shall no longer be outstanding and automatically shall be retired and resume the
status of  authorized  and unissued  shares of Preferred  Stock of the Surviving
Corporation;  the  capital  of the  Surviving  Corporation  shall be  reduced as
permitted  under  the  DGCL  by an  amount  equal  to  the  capital  theretofore
represented by such Outstanding ONS Series A Preferred  Shares;  and the capital
of Newco in respect of such shares of Newco Series A Preferred Stock shall be an
amount equal to the aggregate par value thereof.

                                       A-6


<PAGE>
   (iii) Each of the Outstanding ONS Series B Preferred  Shares shall be changed
and converted into the right to receive one (1) validly issued,  fully paid, and
nonassessable  share  of  Newco  Series  B  Preferred  Stock  (such  right to be
exercised and deemed to have been  exercised by the  respective  holders of such
Outstanding  ONS Series B Preferred  Shares,  and such shares of Newco  Series B
Preferred  Stock  to be  issued  and  deemed  to  have  been  issued  by  Newco,
automatically  and immediately  upon and as of the Effective Time of the Merger;
with rights to accrued,  accumulated,  and unpaid  dividends on each Outstanding
ONS  Series B  Preferred  Share (the  "Series B  Accumulated  Dividends")  being
preserved,  unimpaired,  unchanged,  and  unaffected by such  conversion and the
Merger, such Series B Accumulated  Dividends carrying over and pertaining to and
being  accrued,  accumulated,  and unpaid  dividends on each such share of Newco
Series B Preferred  Stock, and each such share of Newco Series B Preferred Stock
carrying and having such Series B Accumulated Dividends as accrued, accumulated,
and unpaid  dividends  thereon,  notwithstanding  that such dividends shall have
accrued  and  accumulated  from a date prior to the  issuance  of such shares of
Newco Series B Preferred Stock);  such Outstanding ONS Series B Preferred Shares
shall no longer be outstanding and automatically shall be retired and resume the
status of  authorized  and unissued  shares of Preferred  Stock of the Surviving
Corporation;  the  capital  of the  Surviving  Corporation  shall be  reduced as
permitted  under  the  DGCL  by an  amount  equal  to  the  capital  theretofore
represented by such Outstanding ONS Series B Preferred  Shares;  and the capital
of Newco in respect of such shares of Newco Series B Preferred Stock shall be an
amount equal to the aggregate par value thereof.

   (iv)  Fractional  Outstanding  ONS Shares and fractional  Treasury ONS Common
Shares  shall be changed  and  converted  into the right to  receive  fractional
shares of Newco  stock at the same ratio (1:1) as whole  Outstanding  ONS Shares
and whole Treasury ONS Common Shares and shall  otherwise be treated the same as
such whole shares for purposes hereof  ("Outstanding  ONS Shares" meaning all of
the  Outstanding  ONS Common  Shares and all of the  Outstanding  ONS  Preferred
Shares, collectively).

   (b)  Conversion  of Sub Shares.  The  Outstanding  Sub Common  Share shall be
changed  and  converted  into a  number  of  validly  issued,  fully  paid,  and
nonassessable shares of Common Stock of the Surviving Corporation which is equal
to the  number  of  Outstanding  ONS  Common  Shares  immediately  prior  to the
Effective  Time of the  Merger,  a number of validly  issued,  fully  paid,  and
nonassessable  shares of Series A Preferred  Stock of the Surviving  Corporation
which is equal to the  number  of  Outstanding  ONS  Series A  Preferred  Shares
immediately  prior to the Effective Time of the Merger,  and a number of validly
issued,  fully paid, and nonassessable shares of Series B Preferred Stock of the
Surviving  Corporation  which is equal to the number of Outstanding ONS Series B
Preferred  Shares  immediately  prior to the Effective  Time of the Merger (such
shares of Common  Stock of the  Surviving  Corporation,  such shares of Series A
Preferred  Stock of the  Surviving  Corporation,  and such  shares  of  Series B
Preferred  Stock of the  Surviving  Corporation  to be issued and deemed to have
been issued by the Surviving Corporation  automatically and immediately upon and
as of  the  Effective  Time  of  the  Merger);  the  capital  of  the  Surviving
Corporation  in  respect  of  such  shares  of  Common  Stock  of the  Surviving
Corporation,   such  shares  of  Series  A  Preferred  Stock  of  the  Surviving
Corporation,  and such  shares  of  Series B  Preferred  Stock of the  Surviving
Corporation  shall be an amount equal to the  aggregate par value  thereof;  and
such   Outstanding   Sub  Common  Share  shall  no  longer  be  outstanding  and
automatically shall be canceled and cease to exist.

   2.2 Notification of Transfer Agent.  Prior to the Closing Date, Newco and ONS
shall notify their  respective  transfer  agents of the conversions of shares of
ONS stock and of shares of Sub stock pursuant to Section 2.1.

   2.3 Stock  Certificates.  Upon and as of the Effective Time of the Merger, by
virtue  of the  Merger  and  without  any  action  on the part of  either of the
Constituent  Corporations or Newco, the holders of the respective shares, or any
other person:

   (a) Newco. The shares of Newco Common Stock and the shares of Newco Preferred
Stock,  which the  Outstanding  ONS Shares and the Treasury  ONS Common  Shares,
respectively,  shall have been  converted  into the right to  receive,  shall be
represented and evidenced by the same stock

                                       A-7

<PAGE>
certificates  that  previously  represented  and evidenced such  Outstanding ONS
Shares and such Treasury ONS Common Shares; and

   (b)  ONS.  The  holder  of the  certificate  that  immediately  prior  to the
Effective  Time of the Merger  evidenced the  Outstanding  Sub Common Share (the
"Sub Common Stock Certificate") may, at such holder's option, surrender the same
to the Surviving Corporation for cancellation, and such holder shall be entitled
to receive from the  Surviving  Corporation  in exchange  therefor  certificates
representing  and  evidencing  the  number  of  shares  of  Common  Stock of the
Surviving  Corporation,  the number of shares of Series A Preferred Stock of the
Surviving  Corporation,  and the number of shares of Series B Preferred Stock of
the Surviving  Corporation into which such holder's Outstanding Sub Common Share
shall  have  been  converted,  and,  until  surrendered,  the Sub  Common  Stock
Certificate shall represent and evidence the number of shares of Common Stock of
the Surviving  Corporation,  the number of shares of Series A Preferred Stock of
the Surviving Corporation,  and the number of shares of Series B Preferred Stock
of the  Surviving  Corporation  into  which the  Outstanding  Sub  Common  Share
theretofore represented and evidenced thereby shall have been converted.

                                 ARTICLE III
                            ADDITIONAL AGREEMENTS

   3.1 Directors and Officers of Newco Upon the Effective Time of the Merger.

   (a) Directors. As of the Effective Time of the Merger: (i) the whole Board of
Directors  of Newco shall be divided  into the same number of classes into which
the whole Board of  Directors of ONS shall be divided  immediately  prior to the
Effective  Time  of  the  Merger;   (ii)  the  respective   numbers  of  members
constituting  the whole Board of Directors of Newco and each class thereof shall
be equal to the respective  numbers of members  constituting  the whole Board of
Directors of ONS and each class thereof  immediately prior to the Effective Time
of the Merger; and (iii) the Board of Directors of Newco (the "Newco Board") and
each class thereof  shall  consist of the persons  serving as members of the ONS
Board and the corresponding  classes thereof  immediately prior to the Effective
Time of the Merger.  To that end,  effective  immediately prior to the Effective
Time of the Merger,  to the extent necessary to give effect to the intent of the
preceding  sentence:  (i) the whole Board of Directors of Newco shall be divided
into the same number of classes  into which the whole Board of  Directors of ONS
is then divided;  (ii) the respective numbers of members  constituting the whole
Board of  Directors  of Newco  and each  class  thereof  shall be  increased  or
decreased,  as the case may be, to numbers  equal to the  respective  numbers of
members  then  constituting  the whole Board of  Directors of ONS and each class
thereof; and (iii) each person then serving as a member of the Newco Board shall
be, and hereby is, removed,  and each person then serving as a member of a class
of  the  ONS  Board  shall  be,  and  hereby  is,  elected  as a  member  of the
corresponding  class of the Newco  Board,  to serve as such until such  person's
successor  is elected  and  qualified  or until  such  person's  earlier  death,
resignation,  disqualification,  or removal (which power and right to remove are
hereby expressly reserved).

   (b) Officers.  As of the Effective Time of the Merger,  the officers of Newco
shall  be the  persons  serving  as  officers  of ONS  immediately  prior to the
Effective Time of the Merger.  To that end,  effective  immediately prior to the
Effective  Time of the  Merger,  to the extent  necessary  to give effect to the
intent of the  preceding  sentence,  each person  then  serving as an officer of
Newco  shall be, and hereby is,  removed,  and each  person  then  serving as an
officer of ONS shall be, and hereby  is,  appointed  as an officer of Newco,  to
hold  one (1) or more  offices  of  Newco  corresponding  to the one (1) or more
offices of ONS then  held,  until  such  person's  successor  is  appointed  and
qualified or until such person's earlier death,  resignation,  disqualification,
or removal (which power and right to remove are hereby expressly reserved).

   3.2 Newco Certificate of Incorporation.

     (a) Newco Charter.  As of the Effective Time of the Merger, the certificate
of incorporation of Newco shall contain provisions  identical to the ONS Charter
(the "Newco  Charter").  To that end, prior to the Effective Time of the Merger,
to the extent permissible and to the extent necessary to


                                       A-8
<PAGE>
give  effect  to the  intent  of the  preceding  sentence,  the  certificate  of
incorporation of Newco, as the same theretofore may have been amended,  altered,
changed, repealed, and/or supplemented, shall be duly amended, altered, changed,
repealed,  and/or  supplemented,  in accordance  with the DGCL,  and (subject to
paragraph  (b) of this  Section)  such Newco  Charter,  as so altered,  changed,
repealed,   and/or  supplemented,   shall  be  and  remain  the  certificate  of
incorporation  of Newco upon and after the Effective Time of the Merger,  unless
and until duly amended,  altered,  changed,  repealed,  and/or  supplemented  in
accordance with the DGCL (which power and right to amend, alter, change, repeal,
and/or supplement, at any time and from time to time after the Effective Time of
the Merger, are hereby expressly reserved).

   (b) Name Change;  Newco Series C Preferred  Stock. The Newco Charter shall be
amended  and  supplemented  (which  amendment  shall be adopted,  approved,  and
declared  advisable  by the Newco Board and  adopted and  approved by ONS in its
capacity as the sole  stockholder  of Newco prior to the  Effective  Time of the
Merger,  and which  supplement  shall be adopted and approved by the Newco Board
prior to the Effective  Time of the Merger,  and which  amendment and supplement
are hereby adopted, approved, and declared advisable):

   (i)  immediately  following the Effective  Time of the Merger,  to change the
name of Newco to "Orion  Network  Systems,  Inc.,"  by  striking  Article  FIRST
thereof in its entirety and inserting in lieu thereof the following:

     "FIRST:  The  name  of the  Corporation  is  Orion  Network  Systems,  Inc.
(hereinafter called the 'Corporation')."; and

   (ii) as soon as practicable  following the Effective  Time of the Merger,  to
provide for the Newco Series C Preferred Stock.

   3.3 Newco Bylaws. As of the Effective Time of the Merger, the bylaws of Newco
shall contain  provisions  identical to the ONS Bylaws (the "Newco Bylaws").  To
that end, prior to the Effective Time of the Merger,  to the extent necessary to
give effect to the intent of the preceding sentence, the bylaws of Newco, as the
same  theretofore  may have been amended,  altered,  changed,  repealed,  and/or
supplemented,   shall  be  duly  amended,  altered,  changed,  repealed,  and/or
supplemented,  in accordance with the DGCL, and such Newco Bylaws as so amended,
altered, changed, repealed, and/or supplemented,  shall be and remain the bylaws
of Newco upon and after the Effective Time of the Merger,  unless and until duly
amended, altered, changed,  repealed, and/or supplemented in accordance with the
DGCL (which power and right to amend, alter, change,  repeal, and/or supplement,
at any time and from time to time after the  Effective  Time of the Merger,  are
hereby expressly reserved).

   3.4  Consent.  Each of ONS,  Sub,  and  Newco  shall  promptly  apply  for or
otherwise  seek, and use its best efforts to obtain,  all consents and approvals
required to be obtained by it for consummation of the Merger.

   3.5 ONS Stockholder  Meeting; Sub Stockholder Written Consent. ONS shall call
a special meeting of its stockholders  (the "ONS Special Meeting") to be held as
promptly as  practicable  after the date hereof for the purpose of voting  upon,
among other things,  ratification  of this Agreement (the parties  understanding
and  acknowledging  that it is contemplated  that the Merger will be effected in
accordance with Section 251(g) of the DGCL and that no vote of ONS  stockholders
adopting,  approving,  or  authorizing  this  Agreement  or the  Merger  will be
required under the DGCL). Newco, in its capacity as the sole stockholder of Sub,
as promptly as practicable  after the date hereof,  shall execute and deliver to
Sub a written consent in lieu of a stockholder meeting adopting,  approving, and
authorizing this Agreement, in accordance with Section 228 of the DGCL.

   3.6 Employee and Director  ONS Stock  Options.  Upon and as of the  Effective
Time of the Merger and in  connection  with the Merger,  to the  fullest  extent
permitted by applicable  law, Newco shall assume all of ONS's  obligations,  and
ONS shall  have no further  obligations,  with  respect to any  then-outstanding
option to acquire  shares of ONS Common Stock  issued under ONS's 1987  Employee
Stock Option Plan and  Non-Employee  Director Stock Option Plan that theretofore
shall not have expired or been duly exercised by the holders  thereof (each,  if
any, an "ONS Option"), and the due exercise of rights under


                                       A-9

<PAGE>
any such option shall entitle the holder thereof to acquire, upon the same terms
and conditions that were applicable under the corresponding ONS Option, a number
of shares of Newco Common Stock  identical to the number of shares of ONS Common
Stock that were subject to such corresponding ONS Option (a "Newco Option"). ONS
and Newco agree to take all  corporate and other action as shall be necessary to
effectuate  the  foregoing,  and ONS shall use its best  efforts to  obtain,  if
required,  prior to the  Closing  Date,  such  consent of each  holder of an ONS
Option as shall be necessary to effectuate the  foregoing.  Newco shall take all
corporate and other action  necessary to reserve and make available for issuance
upon the due exercise of rights under the Newco  Options a sufficient  number of
shares of Newco Common Stock, and as soon as practicable following the Effective
Time of the Merger  shall  provide to the  record  holders of the Newco  Options
appropriate notice of such holder's rights thereunder.

   3.7  Warrants.  Upon  and as of the  Effective  Time  of  the  Merger  and in
connection with the Merger,  to the fullest extent  permitted by applicable law,
Newco  shall  assume  all of ONS's  obligations,  and ONS shall  have no further
obligations,  with  respect to any  then-outstanding  warrant or other  right to
purchase shares of ONS Common Stock that  theretofore  shall not have expired or
been duly exercised by the holder thereof (each, if any, an "ONS Warrant"),  and
the due exercise of rights  under any such warrant or other right shall  entitle
the holder  thereof to  acquire,  upon the same terms and  conditions  that were
applicable  under the  corresponding  ONS  Warrant,  a number of shares of Newco
Common  Stock  identical  to the number of shares of ONS Common  Stock that were
subject to such  corresponding  ONS Warrant (a "Newco  Warrant").  ONS and Newco
agree to take all corporate and other action as shall be necessary to effectuate
the foregoing,  and ONS shall use its best efforts to obtain, if required, prior
to the Closing  Date,  such  consents of the holders of ONS Warrants as shall be
necessary to effectuate the foregoing.  Newco shall take all corporate and other
action necessary to reserve and make available for issuance upon the exercise of
rights under the Newco  Warrants a  sufficient  number of shares of Newco Common
Stock,  and as soon as  practicable  following the Effective  Time of the Merger
shall provide to the record holders of the Newco Warrants  appropriate notice of
such holders' rights thereunder.

   3.8 Outstanding  Newco Common Share. Upon and as of the Effective Time of the
Merger,   ONS  shall  surrender  to  Newco  the  certificate   representing  the
Outstanding   Newco  Common  Share,  and  the  Outstanding  Newco  Common  Share
automatically  shall be  retired  and resume  the  status of an  authorized  and
unissued share of Newco Common Stock,  and the capital of Newco shall be reduced
as permitted under the DGCL by an amount equal to the par value thereof.

                                  ARTICLE IV
                        REPRESENTATIONS AND WARRANTIES

     4.1  Representations  and  Warranties  of ONS.  ONS hereby  represents  and
warrants:

   (a) Organization. It  is  duly  organized,  validly  existing,  and  in  good
standing as a corporation under the laws of the State of Delaware.

   (b) Power and Authority.  It has corporate power and authority to enter into,
execute, deliver, and perform its obligations under this Agreement.

   (c) Capital Stock. The numbers of authorized  shares of ONS Common Stock, ONS
Preferred Stock, ONS Series A Preferred Stock, and ONS Series B Preferred Stock,
the numbers of Outstanding ONS Common Shares, Outstanding ONS Series A Preferred
Shares,  and  Outstanding  ONS  Series B  Preferred  Shares,  and the  number of
Treasury  ONS Common  Shares are as set forth in  paragraph A of the Recitals to
this Agreement.

     4.2  Representations  and  Warranties  of Sub.  Sub hereby  represents  and
warrants:

   (a) Organization.   It  is  duly  organized,  validly  existing,  and in good
standing as a corporation under the laws of the State of Delaware.

   (b) Power and Authority.  It has corporate power and authority to enter into,
execute,  deliver, and (subject to stockholder approval) perform its obligations
under this Agreement.

                                      A-10
<PAGE>
   (c) Capital Stock.  The number of authorized  shares of Sub Common Stock, the
number of Outstanding Sub Common Shares,  and the number of shares of Sub Common
Stock  issued  but not  outstanding,  are as set  forth  in  paragraph  B of the
Recitals to this Agreement.

     4.3  Representations  and Warranties of Newco.  Newco hereby represents and
warrants:

   (a) Organization.   It  is  duly  organized,  validly  existing,  and in good
standing as a corporation under the laws of the State of Delaware.

   (b) Power and Authority.  It has corporate power and authority to enter into,
execute,  deliver, and (subject to stockholder approval) perform its obligations
under this Agreement.

   (c) Capital  Stock.  The numbers of authorized  shares of Newco Common Stock,
Newco  Preferred  Stock,  Newco  Series A Preferred  Stock,  and Newco  Series B
Preferred  Stock,  the numbers of Outstanding  Newco Common Shares,  outstanding
shares of Newco Series A Preferred Stock, and outstanding shares of Newco Series
B Preferred Stock, and the number of shares of Newco Common Stock issued but not
outstanding,  are, or prior to the Effective  Time of the Merger will be, as set
forth in paragraph C of the Recitals to this Agreement.

                                  ARTICLE V
                             CONDITIONS PRECEDENT

   5.1  Conditions  to  Each  Party's  Obligation  to  Effect  the  Merger.  The
respective  obligations of each party under this  Agreement  shall be subject to
the satisfaction at or prior to the Closing of the following conditions:

   (a)  Stockholder  Approvals.  This  Agreement  shall have been  approved  and
adopted  or  ratified,  as the case may be, by the  affirmative  vote or written
consent,  as appropriate and as the case may be, of the holders of: (i) at least
a majority of the votes of the  Outstanding  ONS Shares  present in person or by
proxy  at the ONS  Special  Meeting  and  entitled  to be voted  hereon,  voting
together as a single class,  with each  Outstanding ONS Common Share entitled to
one (1) vote and each  Outstanding  ONS Preferred Share entitled to one (1) vote
for each whole  share of ONS  Common  Stock  issuable  upon  conversion  of such
Outstanding ONS Preferred Share as of the applicable  date; (ii) the Outstanding
Sub Common Share; and (iii) the Outstanding Newco Common Share.

   (b)  Governmental  Approvals.  All  authorizations,   consents,   orders,  or
approvals of, or  declarations or filings with, or expiration of waiting periods
imposed  by,  any  administrative  agency or  commission  or other  governmental
authority or  instrumentality,  domestic or foreign (a  "Governmental  Entity"),
necessary  for  the  consummation  of  the  transactions  contemplated  by  this
Agreement,  including,  but not limited to, such  requirements  under applicable
state securities laws and the Securities Exchange Act of 1934, as amended, shall
have  occurred or been filed or  obtained,  other than  filings  relating to the
Merger or affecting  Newco's  ownership of ONS or any of its subsidiaries or any
of their properties.

   (c)  Form  S-4.  The   Registration   Statement  on  Form  S-4  covering  the
registration of the Newco Common Stock,  the Newco Series A Preferred Stock, and
the Newco  Series B  Preferred  Stock  shall  have  become  effective  under the
Securities  Act of 1933,  as  amended,  and shall not be the subject of any stop
order or proceedings  seeking a stop order, and the Proxy Statement/  Prospectus
furnished to ONS stockholders regarding this Agreement,  the Exchange Agreement,
and the transactions  contemplated hereby and thereby shall not at the Effective
Time of the Merger be subject to any proceedings  commenced or threatened by the
Securities and Exchange Commission.

   (d) Legal Action. No temporary  restraining  order,  preliminary or permanent
injunction,  or other order  issued by any court of  competent  jurisdiction  or
other  legal   restraint  or  prohibition  (an   "Injunction")   preventing  the
consummation of the Merger shall be in effect,  nor shall any proceeding brought
by any Governmental Entity seeking any of the foregoing be pending. In the event
an Injunction  shall have been issued,  each party agrees to use its  reasonable
diligent efforts to have the Injunction lifted.

                                      A-11
<PAGE>
   (e) Statutes. No statute,  rule, or regulation shall have been enacted by any
Governmental Entity that would make the consummation of the Merger illegal.

   (f) Tax Opinion; ONS Board Determination. Ernst & Young shall have issued the
Tax  Opinion  and the  ONS  Board  shall  have  made a  determination  that  ONS
stockholders  do not recognize gain or loss for United States federal income tax
purposes.

   (g)  Representations   and  Warranties.   Each  of  the  representations  and
warranties made by each party herein shall remain true,  complete,  and accurate
at the Closing Date as if made on and as of the Closing Date.

   (h)  The  Exchange.  The  Exchange  shall  have  occurred  or be  occurring
concurrently with the Merger.

                                  ARTICLE VI
                      TERMINATION, AMENDMENT AND WAIVER

   6.1  Termination.  This  Agreement may be terminated at any time prior to the
Effective Time of the Merger,  whether before or after approval or ratification,
as the  case  may  be,  by the  stockholders  of ONS,  Sub,  and  Newco  of this
Agreement,  the  Merger,  the  Exchange  Agreement,  the  Exchange,  or  matters
presented in connection herewith or therewith:

   (a) by mutual written consent of the parties; or

   (b) by any party if any required approval of the stockholders of ONS, Sub, or
Newco shall not have been obtained by April 30, 1997.

   When action is taken to terminate this Agreement pursuant to this Section, it
shall be  sufficient  for such action to be authorized by the Board of Directors
of the party taking such action and for such party then to notify in writing the
other parties of such action.

   6.2 Event of  Termination.  In the event of  termination of this Agreement as
provided in Section 6.1 hereof,  this Agreement shall forthwith  become void and
there  shall be no  liability  or  obligation  on the  part of any  party or its
officers or directors to the other parties.

   6.3  Expenses.  All costs  and  expenses  incurred  in  connection  with this
Agreement and the  transactions  contemplated  hereby shall be paid by the party
incurring such expense.

   6.4 Amendment. This Agreement may be amended by the parties hereto, by action
taken by their  respective  Boards  of  Directors,  at any time  before or after
ratification or approval,  as the case may be, by the  stockholders of ONS, Sub,
or Newco of this Agreement, the Merger, the Exchange Agreement, the Exchange, or
matters  presented  in  connection  herewith  or  therewith,  but after any such
stockholder  approval,  no amendment shall be made which under Section 251(d) of
the DGCL would  require the  approval  (or  further  approval)  of  stockholders
without  obtaining  such further  approval.  This  Agreement  may not be amended
except by an  instrument  in  writing  signed  on behalf of each of the  parties
hereto.

                                 ARTICLE VII
                              GENERAL PROVISIONS

   7.1  Notices.  All notices  and other  communications  hereunder  shall be in
writing  and  shall be  deemed  given  if  delivered  personally  or  mailed  by
registered or certified  mail (return  receipt  requested) to the parties at the
following  addresses (or at such other address for a party as shall be specified
by like notice):

   (a) If to Newco or Sub, to
       Orion Newco Services, Inc.
       2440 Research Boulevard
       Suite 400
       Rockville, Maryland 20850

                                      A-12


<PAGE>
   (b) If to ONS, to
       Orion Network Systems, Inc.
       2440 Research Boulevard
       Suite 400
       Rockville, Maryland 20850

   7.2  Severability.  If any  term or  other  provision  of this  Agreement  is
invalid,  illegal,  or incapable of being  enforced by any rule of law or public
policy,  all other terms,  conditions,  and provisions of this  Agreement  shall
nevertheless  remain in full force and effect so long as the  economic  or legal
substance of the transactions  contemplated hereby is not affected in any manner
adverse to any party. Upon such  determination  that any term or other provision
is invalid,  illegal,  or incapable of being enforced,  the parties hereto shall
negotiate  in good faith to modify this  Agreement  so as to effect the original
intent of the parties as closely as possible in an acceptable  manner to the end
that the transactions contemplated hereby are fulfilled to the extent possible.

   7.3 Entire Agreement. This Agreement,  including the Exhibits attached hereto
(if any),  constitutes  the entire  agreement  among the parties  regarding  the
subject matter hereof,  and  supersedes all prior  agreements and  undertakings,
both written and oral,  among the parties or any of them  regarding such subject
matter.

   7.4  Assignment.  This Agreement shall not be assigned by operation of law or
otherwise.

   7.5  Parties in  Interest.  This  Agreement  shall be binding  upon and inure
solely to the  benefit  of each party  hereto,  and  nothing in this  Agreement,
except as otherwise  expressly  provided herein,  is intended to or shall confer
upon any other  person any right,  benefit,  or remedy of any nature  whatsoever
under or by reason of this Agreement.

   7.6 Counterparts. This Agreement may be executed in one or more counterparts,
all of which shall be considered  one and the same  Agreement,  and shall become
effective when one or more  counterparts have been signed by each of the parties
and delivered to the other parties,  it being  understood  that all parties need
not sign the same counterpart.

   7.7  Governing  Law.  This  Agreement  shall  be  governed  in all  respects,
including  validity,  interpretation,  and  effect,  by the laws of the State of
Delaware (without reference to conflict of laws rules thereof).

   7.8 Agreement.  Upon and after the Effective Time of the Merger,  an executed
counterpart  of this  Agreement  shall be on file at an office of the  Surviving
Corporation,  located at 2440 Research Boulevard, Suite 400, Rockville, Maryland
20850,  and a copy  of  this  Agreement  shall  be  furnished  by the  Surviving
Corporation,  on request and without cost, to any stockholder of any Constituent
Corporation.

   7.9   Certificates  of  Secretaries.   The  Certificates  of  the  respective
Secretaries of the parties attached hereto are hereby  incorporated by reference
and are to be deemed on and part of this Agreement.

                                      A-13


<PAGE>
   IN WITNESS  WHEREOF,  Newco,  Sub and ONS have  caused this  Agreement  to be
executed,  acknowledged,  and delivered by their respective  officers  thereunto
duly authorized, all as of the date first written above.


                                             ORION NEWCO SERVICES, INC.


                                             By:
                                                 -------------------------------

                                             Name:
                                                  ------------------------------

                                             Title:
                                                   -----------------------------


                                             ORION MERGER COMPANY, INC.


                                             By:
                                                 -------------------------------

                                             Name:
                                                  ------------------------------

                                             Title:
                                                   -----------------------------
                                             ORION NETWORK SYSTEMS, INC.


                                             By:
                                                 -------------------------------

                                             Name:
                                                  ------------------------------

                                             Title:
                                                   -----------------------------

                                      A-14


<PAGE>
                       CERTIFICATE OF THE SECRETARY OF
              ORION MERGER COMPANY, INC., A DELAWARE CORPORATION

   The  undersigned,  the  Secretary of Orion Merger  Company,  Inc., a Delaware
corporation  ("Sub"),  does hereby certify that the foregoing Plan and Agreement
of Merger (the "Agreement") of Sub with and into Orion Network Systems,  Inc., a
Delaware  corporation  ("ONS"), by and among Sub, ONS, and Orion Newco Services,
Inc., a Delaware corporation ("Newco"), after first having been duly adopted and
approved by the Board of Directors of Sub and executed and  acknowledged  by Sub
in accordance  with Section 251 of the General  Corporation  Law of the State of
Delaware  (the  "DGCL"),  has  been  duly  approved  and  adopted  by  the  sole
stockholder  of Sub entitled to vote thereon in  accordance  with Section 251 of
the DGCL, as of January 8, 1997, by written  consent in accordance  with Section
228 of the DGCL.

   This  Certificate  shall  be  attached  to and  deemed  on and a part  of the
Agreement.

   IN WITNESS  WHEREOF,  the undersigned has executed this Certificate as of the
8th day of January, 1997.

                                             /s/  Richard H. Shay
                                             -----------------------------------
                                                  Richard H. Shay


                                      A-15


<PAGE>
                       CERTIFICATE OF THE SECRETARY OF
             ORION NETWORK SYSTEMS, INC., A DELAWARE CORPORATION

   The  undersigned,  the Secretary of Orion Network  Systems,  Inc., a Delaware
corporation  ("ONS"),  does hereby certify that the foregoing Plan and Agreement
of  Merger  (the  "Agreement")  of  Orion  Merger  Company,   Inc.,  a  Delaware
corporation  ("Sub"),  with and into ONS, by and among Sub, ONS, and Orion Newco
Services,  Inc.,  a Delaware  corporation  ("Newco"),  has been duly adopted and
approved  by the Board of  Directors  of ONS on  January 8,  1997,  pursuant  to
subsection  (g) of Section  251 of the General  Corporation  Law of the State of
Delaware (the "DGCL"),  and that the conditions  specified in the first sentence
of said subsection (g) of Section 251 of the DGCL have been satisfied.

   This  Certificate  shall  be  attached  to and  deemed  on and a part  of the
Agreement.

   IN WITNESS  WHEREOF,  the undersigned has executed this Certificate as of the
8th day of January, 1997.

                                             /s/  Richard H. Shay
                                             -----------------------------------
                                                  Richard H. Shay

                                      A-16


<PAGE>
                       CERTIFICATE OF THE SECRETARY OF
              ORION NEWCO SERVICES, INC., A DELAWARE CORPORATION

   The  undersigned,  the  Secretary of Orion Newco  Services,  Inc., a Delaware
corporation ("Newco"), does hereby certify that the foregoing Plan and Agreement
of  Merger  (the  "Agreement")  of  Orion  Merger  Company,   Inc.,  a  Delaware
corporation  ("Sub"),  with and into Orion  Network  Systems,  Inc.,  a Delaware
corporation  ("ONS"),  by and among Sub, ONS, and Newco, after first having been
duly  adopted and  approved by the Board of  Directors of Newco and executed and
acknowledged  by  Newco,  has  been  duly  approved  and  adopted  by  the  sole
stockholder  of Newco  entitled to vote  thereon,  as of January 8, 1997.

   This  Certificate  shall  be  attached  to and  deemed  on and a part  of the
Agreement.  IN WITNESS WHEREOF, the undersigned has executed this Certificate as
of the 8th day of January, 1997.

                                             /s/  Richard H. Shay
                                             -----------------------------------
                                                  Richard H. Shay


                                      A-17


<PAGE>
                                                                  ATTACHMENT B

            SECTION 351 EXCHANGE AGREEMENT AND PLAN OF CONVERSION
                                    AMONG
                INTERNATIONAL PRIVATE SATELLITE PARTNERS, L.P.
                         ORION NETWORK SYSTEMS, INC.,
                         ORION SATELLITE CORPORATION,
                    BRITISH AEROSPACE COMMUNICATIONS, INC.
                   COM DEV SATELLITE COMMUNICATIONS LIMITED
                KINGSTON COMMUNICATIONS INTERNATIONAL LIMITED
               LOCKHEED MARTIN COMMERCIAL LAUNCH SERVICES, INC.
                               MCN SAT US, INC.
                                     AND
                        TRANS-ATLANTIC SATELLITE, INC.
                                 DATED AS OF
                                   JUNE, 1996

                                       

<PAGE>
            SECTION 351 EXCHANGE AGREEMENT AND PLAN OF CONVERSION

   THIS SECTION 351 EXCHANGE AGREEMENT AND PLAN OF CONVERSION (this "Agreement")
is  entered  into as of June,  1996,  between  and among  International  Private
Satellite  Partners,  L.P., a Delaware limited  partnership  ("Orion Atlantic");
Orion Network Systems,  Inc., a Delaware  corporation  ("ONS");  Orion Satellite
Corporation,  a Delaware  corporation  ("OrionSat");  and each of the  following
entities  that  executes and delivers a signature  page hereto on or before July
12,  1996:  British  Aerospace  Communications,  Inc.,  a  Delaware  corporation
("BAe"), COM DEV Satellite  Communications Limited, a Canadian corporation ("COM
DEV"),  Kingston  Communications  International  Limited, a company incorporated
under  the laws of  England  ("Kingston"),  Lockheed  Martin  Commercial  Launch
Services,  Inc., a Delaware corporation ("Lockheed Martin"), MCN Sat US, Inc., a
Delaware corporation ("MCN Sat"), and Trans Atlantic Satellite, Inc., a Delaware
corporation ("TA Sat") (collectively, the "Exchanging Partners").

   WHEREAS,  ONS  and  the  Exchanging  Partners  (collectively,   the  "Limited
Partners") collectively own limited partnership interests in Orion Atlantic;

   WHEREAS, OrionSat is the sole general partner of Orion Atlantic;

   WHEREAS,  ONS and the Exchanging  Partners  desire to (i) form a new Delaware
corporation  to be named  Orion Newco  Services,  Inc.  ("Newco")  substantially
identical in all material  respects  (including  with respect to  certificate of
incorporation,  bylaws,  capital  structure,  and similar matters) to ONS in the
Newco  Formation (as defined  below);  (ii) have a newly  created  subsidiary of
Newco  merge  into ONS in a  transaction  in which all  capital  stock of ONS is
exchanged for equivalent capital stock (common or preferred, as applicable, with
the same relative rights and  preferences) of Newco,  and in which ONS becomes a
wholly owned  subsidiary  of Newco in the Merger (as defined  below);  and (iii)
have the Exchanging  Partners  transfer their limited  partnership  interests in
Orion  Atlantic  to Newco in  exchange  for shares of a newly  created  class of
Series C 6%  Cumulative  Convertible  Redeemable  Preferred  Stock of Newco (the
"Newco  Preferred  Stock") on the terms and  conditions  set forth herein in the
Exchange (as defined below), all pursuant to Section 351 of the Internal Revenue
Code of 1986, as amended (the "Code"); and

   WHEREAS,  in  connection  with  the  transactions   described  in  the  prior
paragraph,  the Credit  Facility  Refinancing,  Bond  Offering,  Bank  Agreement
Termination,   Capacity  Agreement  Termination  and  Convertible   Subordinated
Debenture  Offering  (as  defined  below)  will  be  pursued.  The  transactions
contemplated  by this  Agreement are believed to be necessary to accomplish  the
Credit Facility Refinancing, Bond Offering, Bank Agreement Termination, Capacity
Agreement Termination and Convertible  Subordinated  Debenture Offering, and all
parties  hereto,   including  the  Exchanging   Partners,   which  will  be  the
stockholders of Newco immediately after completion of the Exchange, believe that
they will  benefit  substantially  from the Credit  Facility  Refinancing,  Bond
Offering,  Bank  Agreement  Termination,   Capacity  Agreement  Termination  and
Convertible Subordinated Debenture Offering.

   NOW, THEREFORE, in consideration of the foregoing and of the mutual covenants
and  agreements  hereinafter  set forth,  the  parties  hereto  hereby  agree as
follows:

1. DEFINITIONS

   For all purposes of this Agreement,  certain  capitalized  terms specified in
Exhibit  A shall  have the  meanings  set  forth in that  Exhibit  A,  except as
otherwise expressly provided.

2. NEWCO FORMATION

 2.1 FORMATION OF NEW CORPORATION

   The parties  hereto shall form a new Delaware  corporation  to be named Orion
Newco Services,  Inc. which is substantially  identical in all material respects
to ONS (the "Newco Formation"). In particular, Newco shall have a certificate of
incorporation  and bylaws  substantially  identical in all material  respects to
those of ONS  (modified  to reflect the  different  name and Newco being a newly
formed corporation).

                                       B-2

<PAGE>
Pursuant to the certificate of incorporation of Newco, the board of directors of
Newco  shall  duly  adopt,   authorize,   execute  and  file   Certificates   of
Designations,  Rights  and  Preferences  of  Series A 8%  Cumulative  Redeemable
Convertible  Preferred  Stock of Newco  substantially  identical in all material
respects to the ONS Series A Preferred  Stock (as defined below) and of Series B
8% Cumulative  Redeemable  Convertible  Preferred  Stock of Newco  substantially
identical  in all  material  respects  to the ONS Series B  Preferred  Stock (as
defined below).

 2.2 INITIAL OWNERSHIP OF NEWCO

   ONS shall be the  initial  stockholder  of Newco,  and shall own one share of
Newco common stock.

 2.3 REPLICATION OF ONS MANAGEMENT

     ONS  shall  take  the  steps  necessary  to make  the  management  of Newco
identical to the  management  of ONS,  including  with respect to directors  and
officers.

 2.4 NEWCO FORMATION DOCUMENTS

   ONS shall cause all necessary documents (the "Newco Formation  Documents") to
effect the Newco  Formation and other  matters  referred to in Sections 2.1, 2.2
and 2.3 to be prepared and circulated to the Exchanging  Partners for review and
comment.  The  Exchanging  Partners  agree to submit any  comments  on the Newco
Formation Documents, consistent with the requirement that Newco be substantially
identical in all  material  respects to ONS,  within 10 Business  Days after all
Exchanging  Partners  have  received the initial  drafts of such  documents  and
within five Business Days after  receipt of subsequent  drafts.  ONS shall cause
final drafts of the Newco  Formation  Documents to be prepared,  consistent with
the requirement that Newco be substantially  identical in all material  respects
to ONS, and circulated to the Exchanging Partners. The Exchanging Partners shall
have a period of five Business Days after all Exchanging  Partners have received
such final drafts to raise any  objections  to the  contents of such  documents,
consistent with the  requirement  that Newco be  substantially  identical in all
material  respects to ONS,  and the  parties  shall  negotiate  in good faith to
resolve any such  objections.  The  resolution of any such  objections  shall be
reflected  in the  Newco  Formation  Documents,  and  such  documents  shall  be
finalized and  implemented.  ONS shall cause the Newco Formation  Documents,  as
finalized and implemented,  to be circulated to the Exchanging Partners.  If the
finalized Newco Formation Documents are not consistent with the requirement that
Newco  be  substantially  identical  in all  material  respects  to ONS  and any
discrepancies are not reasonably acceptable to the Exchanging Partners,  each of
the  Exchanging  Partners  shall  have the  right to  terminate  this  Agreement
pursuant  to the final  paragraph  of  Section  13.1.  If all of the  Exchanging
Partners  shall  not  have  terminated  this  Agreement  pursuant  to the  final
paragraph  of  Section  13.1  within a period of five  Business  Days  after all
Exchanging partners have received such finalized and implemented Newco Formation
Documents, the "Newco Finalization Date" shall be deemed to have occurred on the
last day of such period.

3. EXCHANGE OF INTERESTS

 3.1 NEWCO PREFERRED STOCK

   Newco  shall duly  adopt,  authorize,  execute  and file the  Certificate  of
Designations,  Rights  and  Preferences  of  Series C 6%  Cumulative  Redeemable
Convertible  Preferred  Stock  establishing  the terms and  relative  rights and
preferences  of such  series of Newco  Preferred  Stock in the form set forth as
Exhibit B to this Agreement (the  "Certificate of  Designations")  and authorize
the  issuance and sale to the  Exchanging  Partners of the  aggregate  number of
shares  of  Newco  Preferred  Stock  to be  issued  to the  Exchanging  Partners
hereunder  (and Newco shall  authorize the issuance and sale of such  additional
shares of Newco  Preferred  Stock in an  amount  equal to the  aggregate  of the
Adjustment  Amounts  referred to in Section 3.2(c)  hereof).  The Certificate of
Designations  shall be in full force and  effect  under the laws of the State of
Delaware as of the Closing Date.

                                       B-3

<PAGE>
 3.2 TERMS OF EXCHANGE

   On the basis of the  representations,  warranties  and  agreements  contained
herein, and subject to the terms and conditions  hereof,  each of the Exchanging
Partners  hereby  agrees to  transfer to Newco at the Closing all of its limited
partnership  interests in Orion  Atlantic  (individually,  an "LP  Interest" and
collectively  the "LP Interests") and other rights relating thereto as specified
below  ("Other LP  Rights")  in  exchange  for shares of Newco  Preferred  Stock
(collectively, the "Exchange"), as follows:

   (a) Transfers by the Exchanging Partners to Newco.

   (i) If BAe is an Exchanging  Partner,  BAe agrees to transfer to Newco at the
Closing  its 25.00% LP  Interest;  all of its rights and  obligations  under the
Partnership Agreement,  including all of its rights to receive distributions and
allocations thereunder, and all other rights it may have as a limited partner of
Orion Atlantic under applicable law; all of its rights and obligations under the
Refund Agreement, including all of its rights to receive refunds thereunder; all
of its rights and obligations under the Consent and Agreement,  including all of
its  rights  to  transfer  LP  Interests  thereunder;  all  of  its  rights  and
obligations under the Preferred Bidders  Agreement;  all of its rights under the
Option Agreement; all of its rights under the Subscription Agreement; and all of
its rights and obligations under the Agreement of Principles (collectively,  the
"BAe Exchange Assets").

   (ii) If COM DEV is an Exchanging Partner, COM DEV agrees to transfer to Newco
at the Closing its 4.17% LP Interest;  all of its rights and  obligations  under
the Partnership Agreement,  including all of its rights to receive distributions
and  allocations  thereunder,  and all  other  rights  it may have as a  limited
partner  of  Orion  Atlantic  under  applicable  law;  all  of  its  rights  and
obligations under the Refund  Agreement,  including all of its rights to receive
refunds  thereunder;  all of its rights and obligations under the PPU Agreement,
including all of its rights to receive repayment of amounts advanced  thereunder
and interest accrued on such advances;  all of its rights and obligations  under
the Preferred Bidders  Agreement;  all of its rights under the Option Agreement;
all of its rights under the  Subscription  Agreement;  and all of its rights and
obligations  under  the  Agreement  of  Principles  (collectively,  the "COM DEV
Exchange Assets").

   (iii) If Kingston is an Exchanging  Partner,  Kingston  agrees to transfer to
Newco at the Closing its 4.17% LP  Interest;  all of its rights and  obligations
under  the  Partnership  Agreement,  including  all of  its  rights  to  receive
distributions and allocations thereunder,  and all other rights it may have as a
limited  partner of Orion Atlantic under  applicable  law; all of its rights and
obligations  under the PPU  Agreement,  including  all of its  rights to receive
repayment of amounts advanced  thereunder and interest accrued on such advances,
other than interest paid to Kingston under Section 3.2(d); all of its rights and
obligations under the Preferred Bidders  Agreement;  all of its rights under the
Option Agreement; all of its rights under the Subscription Agreement; and all of
its rights and obligations under the Agreement of Principles (collectively,  the
"Kingston Exchange Assets"). The Kingston Sales Representative  Agreements shall
remain in full force without any modifications being effected by this Agreement,
and Orion Atlantic,  OrionSat and Kingston agree that even after the Closing and
the transfer of the Kingston LP Interest to Newco, Kingston shall continue to be
treated  as if it were a limited  partner  of Orion  Atlantic  for  purposes  of
payment of the  Override  Commissions  under the Kingston  Sales  Representative
Agreements only.

   (iv) If Lockheed Martin is an Exchanging  Partner,  Lockheed Martin agrees to
transfer to Newco at the Closing  its 8.33% LP  Interest;  all of its rights and
obligations  under the  Partnership  Agreement,  including  all of its rights to
receive  distributions and allocations  thereunder,  and all other rights it may
have as a limited  partner of Orion  Atlantic under  applicable  law; all of its
rights and obligations under the Refund  Agreement,  including all of its rights
to receive refunds  thereunder;  all of its rights and obligations under the PPU
Agreement,  including all of its rights to receive repayment of amounts advanced
thereunder  and  interest  accrued  on  such  advances;  all of its  rights  and
obligations under the Preferred Bidders Agreement; all of its

                                       B-4

<PAGE>
rights  under the Option  Agreement;  all of its rights  under the  Subscription
Agreement;  and  all of its  rights  and  obligations  under  the  Agreement  of
Principles (collectively, the "Lockheed Martin Exchange Assets").

   (v) If MCN Sat is an Exchanging Partner, MCN Sat agrees to transfer (or cause
to be  transferred)  to Newco at the Closing its 8.33% LP  Interest;  all of its
rights and  obligations  under the Partnership  Agreement,  including all of its
rights to receive distributions and allocations thereunder, and all other rights
it may have as a limited partner of Orion Atlantic under  applicable law; all of
the rights and  obligations  of its Affiliate,  MCN Sat Service S.A.,  under the
Refund Agreement,  including all of such Affiliate's rights to receive refunds
thereunder; all of its rights and obligations under the PPU Agreement, including
all of its  rights to  receive  repayment  of amounts  advanced  thereunder  and
interest accrued on such advances;  all of its rights and obligations  under the
Preferred Bidders Agreement;  all of its rights under the Option Agreement;  all
of its  rights  under the  Subscription  Agreement;  and all of its  rights  and
obligations  under  the  Agreement  of  Principles  (collectively,  the "MCN Sat
Exchange  Assets").  (All references  herein to rights or obligations of MCN Sat
shall  include  those which may still be retained by MMB, the  transferor of MCN
Sat's LP Interest.) The MCN Sat Sales  Representative  Agreements shall remain
in full force without any  modifications  being effected by this Agreement,  and
Orion  Atlantic,  OrionSat and MCN Sat agree that even after the Closing and the
transfer  of the MCN Sat LP  Interest  to Newco,  MCN Sat shall  continue  to be
treated  as if it were a limited  partner  of Orion  Atlantic  for  purposes  of
payment  of the  Override  Commissions  under the MCN Sat  Sales  Representative
Agreements only.

   (vi) If TA Sat is an Exchanging  Partner,  TA Sat shall  transfer to Newco at
the Closing its 8.33% LP Interest;  all of its rights and obligations  under the
Partnership Agreement,  including all of its rights to receive distributions and
allocations thereunder, and all other rights it may have as a limited partner of
Orion Atlantic under applicable law; all of its rights and obligations under the
Refund Agreement, including all of its rights to receive refunds thereunder; all
of its rights and obligations under the Preferred Bidders Agreement;  all of its
rights  under the Option  Agreement;  all of its rights  under the  Subscription
Agreement;  and  all of its  rights  and  obligations  under  the  Agreement  of
Principles (collectively, the "TA Sat Exchange Assets").

   (b) Transfers by Newco to the Exchanging Partners.

   (i) If BAe is an  Exchanging  Partner,  Newco  shall  transfer  to BAe at the
Closing,  in  exchange  for the BAe  Exchange  Assets,  43,953  shares  of Newco
Preferred Stock, plus its respective Adjustment Amount,  calculated as set forth
in SECTION 3.2(c).

   (ii) If COM DEV is an Exchanging Partner,  Newco shall transfer to COM DEV at
the Closing, in exchange for the COM DEV Exchange Assets,  8,302 shares of Newco
Preferred Stock, plus its respective Adjustment Amount,  calculated as set forth
in SECTION 3.2(c).

   (iii) If Kingston is an Exchanging Partner,  Newco shall transfer to Kingston
at the Closing,  in exchange for the Kingston Exchange Assets,  10,222 shares of
Newco Preferred Stock, plus its respective Adjustment Amount,  calculated as set
forth in  SECTION  3.2(c) and PPU  Interest  Shares  calculated  as set forth in
SECTION 3.2(d).

   (iv) If Lockheed  Martin is an Exchanging  Partner,  Newco shall  transfer to
Lockheed  Martin at the Closing,  in exchange for the Lockheed  Martin  Exchange
Assets,  17,143 shares of Newco Preferred Stock, plus its respective  Adjustment
Amount, calculated as set forth in SECTION 3.2(c).

   (v) If MCN Sat is an Exchanging  Partner,  Newco shall transfer to MCN Sat at
the Closing, in exchange for the MCN Sat Exchange Assets, 15,746 shares of Newco
Preferred Stock, plus its respective Adjustment Amount,  calculated as set forth
in SECTION 3.2(c).

   (vi) If TA Sat is an Exchanging  Partner,  Newco shall  transfer to TA Sat at
the Closing, in exchange for the TA Sat Exchange Assets,  12,426 shares of Newco
Preferred Stock, plus its respective Adjustment Amount,  calculated as set forth
in SECTION 3.2(c).

                                       B-5

<PAGE>
   The  number of shares of Newco  Preferred  Stock  specified  in this  SECTION
3.2(b),  in  SECTIONS  3.2(c) and 3.2(d)  shall be adjusted  proportionately  to
reflect  any  subdivision,   stock  split,  stock  dividend,   recapitalization,
combination  or reverse stock split of ONS capital stock or similar  transaction
by ONS between the date hereof and the Closing Date.

   (c) Adjustment Amounts.

   The numbers of shares of Newco Preferred Stock to be issued to the respective
Exchanging  Partners  as listed in  SECTION  3.2(b)  shall be  increased  by the
Adjustment  Amount for such Exchanging  Partner,  calculated as set forth below.
The "Adjustment Amount" for an Exchanging Partner shall equal (i) the sum of (A)
the amounts paid by such Exchanging  Partner for obligations (or an Affiliate of
such Exchanging  Partner) pursuant to the Capacity  Agreement (as defined below)
and which is subject to being refunded under the Refund  Agreement,  and by such
Exchanging  Partner  pursuant to the Contingent  Capacity  Agreement (as defined
below),  in each case to which such Exchanging  Partner (or an Affiliate of such
Exchanging  Partner) is a party, during the period from July 1, 1996 through the
Closing Date (the "Adjustment Period"),  plus (B) the amount of interest accrued
with respect to funds  advanced by such  Exchanging  Partner (or an Affiliate of
such  Exchanging  Partner)  other than  Kingston  (or an  Affiliate of Kingston)
pursuant  to the PPU  Agreement  during the  Adjustment  Period,  minus (ii) the
product of the number of days in the  Adjustment  Period  multiplied  by the Tax
Adjustment Factor for such Exchanging  Partner,  divided by (iii) $1,000. To the
extent that amounts are due or payable from an  Exchanging  Partner or Affiliate
under its  Capacity  Agreement  or  Contingent  Capacity  Agreement  during  the
Adjustment  Period,  but are not actually paid prior to the Closing  Date,  such
amounts shall not be included in clause (i)(A) of this paragraph.  Similarly, to
the extent that amounts are paid by an Exchanging Partner or Affiliate under its
Capacity Agreement or Contingent Capacity Agreement during the Adjustment Period
for  obligations  of such  Exchanging  Partner  arising after the Closing,  such
amount shall be refunded to the  Exchanging  Partner at the Closing.  Nothing in
this paragraph  shall affect the  obligations of any Exchanging  Partner to make
any payment under its Capacity Agreement or Contingent Capacity Agreement during
the Adjustment  Period or otherwise,  or affect the amount of interest  accruing
under the PPU Agreement.

   (d) Kingston Investment in PPU Interest Shares.

   Notwithstanding the exchange of Kingston Exchange Assets pursuant to SECTIONS
3.2(a)(iii) and 3.2(b)(iii), at the Closing Orion Atlantic shall pay to Kingston
in cash the total interest  accrued until Closing with respect to funds advanced
by Kingston  pursuant to the PPU Agreement (the "Total  Accrued PPU  Interest").
Kingston  shall at the Closing  invest an amount equal to the Total  Accrued PPU
Interest in shares of Newco Preferred Stock (the "PPU Interest  Shares").  Since
the amount to be paid to Kingston under this paragraph is the same as the amount
to be invested  by  Kingston,  Orion  Atlantic  shall pay the Total  Accrued PPU
Interest  directly to Newco at the Closing.  The total number of shares of Newco
Preferred Stock to be issued to Kingston for its investment under this paragraph
shall equal (i) the Total  Accrued PPU  Interest,  minus (ii) the product of the
number of days in the Adjustment  Period multiplied by the Tax Adjustment Factor
for such Exchanging  Partner (to the extent Tax Adjustment  Factor was not fully
applied in (c) above), divided by (iii) $1,000.

 3.3 ALLOCATION OF NEWCO PREFERRED STOCK

   The Newco  Preferred  Stock to be issued to each  Exchanging  Partner  at the
Closing shall be allocated among such Exchanging  Partner's Exchange Assets as
follows:  first,  to the rights  under the PPU  Agreement,  including  rights to
receive  repayment of amounts  advanced  thereunder and interest accrued on such
advances, and the rights under the Refund Agreement, including rights to receive
refunds  thereunder,  until such Exchanging Partner has received Newco Preferred
Stock  with a fair  market  value  equal to such  rights;  and  second,  to such
Exchanging Partner's LP Interest and other Exchange Assets.

4. MERGER

 4.1 FORMATION OF SUBSIDIARY OF NEWCO

   Newco shall form a new Delaware corporation to be named Orion Merger Company,
Inc. ("Merger Sub"), and Newco shall be the sole stockholder of Merger Sub.

                                       B-6

<PAGE>
 4.2 TERMS OF MERGER

   On the basis of the representations, warranties and agreements contained in a
merger agreement, and subject to the terms and conditions hereof, at the Closing
Merger Sub shall be merged into ONS pursuant to the Delaware General Corporation
Law in a merger  in which  ONS  shall be the  surviving  company  and all of the
assets,  rights,  property,  liabilities  and  obligations of Merger Sub and ONS
shall be vested in ONS as the surviving company (the "Merger").  Pursuant to the
Merger,  holders  of  all  of  the  capital  stock  of  ONS  shall  receive,  as
consideration  for their capital stock of ONS, an identical  number of shares of
substantially identical capital stock (common or preferred, as applicable,  with
the same relative rights and preferences) of Newco.

 4.3 TRANSFER OF CERTAIN CONTRACTS

   In  connection  with the Merger,  all contracts  and  agreements  relating to
capital stock of ONS in effect at the Closing  shall be replaced with  contracts
and agreements substantially equivalent in all material respects relating to the
capital stock of Newco, including without limitation,  all options, warrants and
other  rights  to  purchase   capital  stock  and  all  contracts   relating  to
registration rights, voting of shares, transfer of shares and similar matters.

 4.4 MERGER DOCUMENTS

   ONS shall cause all necessary  documents  (the "Merger  Documents") to effect
the  Merger  and other  matters  referred  to in  Section 4 to be  prepared  and
circulated to the  Exchanging  Partners for review and comment.  The  Exchanging
Partners agree to submit any comments on the Merger Documents within 10 Business
Days after  receipt of the  initial  drafts of such  documents  and within  five
Business Days after receipt of subsequent  drafts.  ONS shall cause final drafts
of the  Merger  Documents  to be  prepared  and  circulated  to  the  Exchanging
Partners.  The  Exchanging  Partners  shall have a period of five  Business Days
after  receipt of such final drafts to raise any  objections  to the contents of
such  documents,  and the parties  shall  negotiate in good faith to resolve any
such objections. The resolution of any such objections shall be reflected in the
Merger Documents, and such documents shall be put in final form for execution at
the Closing.

5. ADDITIONAL UNDERTAKINGS AND COVENANTS

   ONS and OrionSat,  jointly and severally on the one hand,  and the Exchanging
Partners, severally and not jointly on the other hand, hereby covenant and agree
with each other as follows:

 5.1 CONSENTS AND APPROVALS

   ONS and OrionSat shall take all measures reasonably necessary or advisable to
secure such consents,  authorizations and approvals of governmental  authorities
and of private persons or entities with respect to the transactions contemplated
by this  Agreement,  and to the  performance  of all other  obligations  of such
parties hereunder, as may be required by any applicable statute or regulation of
the  United  States  or any  country,  state  or  other  jurisdiction  or by any
agreement of any kind whatsoever to which any of them is a party or by which any
of them is bound  and  which  are set  forth on  Schedule  7.3.  Notwithstanding
SECTIONS 6.4 and 7.3, subsequent to the execution of this Agreement and prior to
the Closing  Date,  ONS,  OrionSat and the  Exchanging  Partners  shall take all
measures   reasonably   necessary  or   advisable   to  secure  such   consents,
authorizations and approvals of governmental  authorities and of private persons
or entities with respect to the transactions contemplated by this Agreement, and
to the performance of all other obligations of such parties hereunder, as may be
required by any  applicable  statute or  regulation  of the United States or any
country,  state or other jurisdiction or by any agreement of any kind whatsoever
to which any of them is a party or by which any of them is bound.  ONS, OrionSat
and the  Exchanging  Partners  shall (a)  cooperate  in the filing of all forms,
notifications,  reports and information,  if any,  required or reasonably deemed
advisable pursuant to applicable statutes,  rules,  regulations or orders of any
governmental or supragovernmental  authority in connection with the transactions
contemplated  by this Agreement and (b) use their  respective good faith efforts
to cause any

                                       B-7

<PAGE>
applicable  waiting  periods  thereunder  to expire  and any  objections  to the
transactions contemplated hereby to be withdrawn before the Closing.

 5.2 APPROVAL BY STOCKHOLDERS OF ONS

   In addition to the consents and  approvals  referred to in Section 5.1 above,
ONS shall take all  measures  reasonably  necessary  or  advisable to secure all
required  consents of the  stockholders of ONS (including the consent of holders
of  ONS'  preferred  stock)  to the  Merger,  the  Exchange  and  any  related
transactions  requiring  stockholder  consent  (collectively,  with any required
consent of ONS' preferred  stockholders,  the "ONS Stockholder Consent").  The
parties  acknowledge  that in order to obtain the ONS Stockholder  Consent,  ONS
will need to file a merger proxy statement with the United States Securities and
Exchange  Commission  ("SEC"),  revise the merger proxy statement in response to
comments  from the SEC,  obtain  approval of the SEC of the final version of the
merger proxy statement before it is mailed to ONS  stockholders,  call a meeting
of  stockholders  of ONS for  approximately  30 days  after  such  merger  proxy
statement is mailed to ONS  stockholders  and obtain the  requisite  stockholder
vote at the meeting  (such  merger proxy  statement,  including  all  amendments
thereto is referred to herein as the "Merger Proxy  Statement").  The Exchanging
Partners  shall  cooperate  with ONS in  preparing  and filing the Merger  Proxy
Statement  with the SEC and in  obtaining  SEC  clearance  of the  Merger  Proxy
Statement,  including supplying  information on each Exchanging Partner which is
reasonably  necessary  or  advisable  for ONS to  include  in the  Merger  Proxy
Statement or to be provided to any  government  agency or authority  pursuant to
applicable  statutes,  rules,  regulations  or  orders  of any  governmental  or
supragovernmental authority in connection with the Merger and other transactions
contemplated by this Agreement;  provided,  however, that none of the Exchanging
Partners   shall  be  required  to  supply  any   confidential   or  proprietary
information.  ONS shall use its good faith efforts to cause the ONS  Stockholder
Consent to be obtained  expeditiously  and any objections of ONS Stockholders to
the Merger and other transactions contemplated hereby to be withdrawn before the
Closing.

 5.3 REFINANCING OF CREDIT FACILITY; CANCELLATION OF CAPACITY AGREEMENTS

   It is presently  contemplated  that Newco,  Orion Atlantic,  ONS and OrionSat
will,  as of the Closing  Date,  complete a  refinancing  (the "Credit  Facility
Refinancing") of the indebtedness of Orion Atlantic outstanding under the Credit
Agreement (the "Credit  Facility")  dated December 6, 1991 among Orion Atlantic,
the Banks named therein (the  "Lenders") and The Chase  Manhattan Bank (National
Association),  as Agent ("Chase") using proceeds of an underwritten  offering of
notes or  debentures  of Newco to the  public (a "Bond  Offering").  The  Credit
Facility Refinancing is to effect the Capacity Agreement Termination and release
of the Capacity  Guarantees,  as discussed  (and defined)  below in this SECTION
5.3.  ONS shall use its good  faith  efforts to cause  Newco to  complete a Bond
Offering on reasonable  commercial  terms.  Notwithstanding  the foregoing,  the
parties acknowledge and agree that the terms of a Bond Offering are likely to be
determined in large part by the  requirements  of prospective  investors in that
Bond  Offering,  and that Newco and ONS reserve the right not to proceed  with a
Bond Offering if they determine that such Bond Offering would not be in the best
interest  of the  stockholders  of Newco or the  stockholders  of ONS (who would
become  stockholders of Newco in the Merger)  generally,  including the entities
who would be  becoming  stockholders  of Newco  pursuant to the  Exchange).  ONS
agrees to inform the Exchanging Partners periodically and in a timely fashion of
the progress of the Bond  Offering,  including  the terms being  proposed by the
underwriters  thereof, and the Exchanging Partners may advise ONS of their views
regarding  the terms of the Bond  Offering.  Newco is to use the proceeds of the
Bond Offering first for the Credit Facility Refinancing (including costs of such
transaction and the costs of terminating the interest rate protection agreements
entered  into in  connection  with the  Credit  Facility),  and if any  proceeds
remain,  then for financing of a second  satellite with coverage of the Atlantic
Ocean region and Europe ("Orion 2") or for working capital.

   In connection with the Credit Facility  Refinancing,  Newco,  Orion Atlantic,
ONS,  OrionSat and the Exchanging  Partners  shall take all measures  reasonably
necessary  or  advisable  to  cause  the   termination   (the  "Bank   Agreement
Termination"),   concurrently   with  the  completion  of  the  Credit  Facility
Refinancing,  of all agreements  between or among the Lenders and Chase,  on the
one  hand,  and one or more of  Newco,  Orion  Atlantic,  OrionSat,  ONS and the
Exchanging Partners and/or their affiliates on the other

                                       B-8

<PAGE>
hand, relating to the Credit Facility or the security or credit support thereof,
including  without  limitation,  in the case of each  Exchanging  Partner and/or
their affiliates,  a Consent and Agreement, an Assignment and Security Agreement
and a Guarantee  Agreement  (the  "Credit  Facility  Documents").  However,  the
previous sentence will not oblige the Exchanging Partners to incur any liability
in connection with the Bank Agreement Termination.

   In connection  with the Credit  Facility  Refinancing  and the Bank Agreement
Termination,  Newco, Orion Atlantic,  ONS, OrionSat and the Exchanging  Partners
shall  take  all  measures  reasonably  necessary  or  advisable  to  cause  the
termination  (the  "Capacity  Agreement  Termination"),  concurrently  with  the
completion  of  the  Credit   Facility   Refinancing   and  the  Bank  Agreement
Termination,  of all obligations  under the  Communications  Satellite  Capacity
Agreements  and the  Contingent  Communications  Satellite  Capacity  Agreements
between  Orion  Atlantic  and  each  of the  Exchanging  Partners  and/or  their
affiliates (the "Capacity  Agreements" and the "Contingent Capacity Agreements,"
respectively) arising from and after the Capacity Agreement Termination, and all
guarantees or other credit support of such obligations ("Capacity  Guarantees");
provided,  however,  that (i) the  Capacity  Agreements  of Kingston and MCN Sat
Service S.A. (but not the associated  Capacity  Guarantees) shall remain in full
force and effect,  (ii) the Kingston Capacity Agreement shall be deemed amended,
effective as of the Closing (and Kingston and Orion  Atlantic  shall execute and
deliver  such  written  documents   evidencing  such  amendment  as  either  may
reasonably  request),  to reduce to 17 MHz the amount of capacity subject to the
Kingston Capacity Agreement (of which 8 MHz shall be the capacity presently used
by Kingston  under the Kingston  Capacity  Agreement and of which 9 MHz shall be
the  capacity  presently  used  by  Kingston  under  one  of  the  BAe  Capacity
Agreements),  with an option (subject to availability) to increase the amount of
capacity  subject to the  Kingston  Capacity  Agreement  for use by  Kingston in
providing its network service  products,  but not for resale, up to a maximum of
27 MHz at the same rate and on the same terms and conditions as set forth in the
Kingston  Capacity  Agreement,  but (to the extent easily effected  technically)
without  any  obligation  to take  such  capacity  in 9 MHz  units or any  other
pre-determined  denomination,  and  (iii)  the MCN  Sat  Service  S.A.  Capacity
Agreement  shall be deemed  amended,  effective  as of the Closing  (and MCN Sat
Service S.A. and Orion Atlantic shall execute and deliver such written documents
evidencing such amendment as either may reasonably request), to reduce to 18 MHz
the amount of capacity subject thereto.

 5.4 AMENDMENT AND RESTATEMENT OF PARTNERSHIP AGREEMENT

   The  Partnership  Agreement  shall be amended and  restated as of the Closing
Date to read in its  entirety as set forth in Exhibit C (the "Third  Amended and
Restated Partnership  Agreement"),  and each of ONS, OrionSat and the Exchanging
Partners agree to execute, and deliver at the Closing, counterparts to the Third
Amended and Restated Partnership Agreement.

 5.5 REGISTRATION RIGHTS

   Concurrently  with the  Closing,  Newco and each of the  Exchanging  Partners
shall execute and deliver a Registration  Rights Agreement in the form set forth
as Exhibit D (the "Registrations Rights Agreement").

 5.6 ACCESS; INVESTIGATIONS BY THE EXCHANGING PARTNERS

   ONS shall,  through  the  Closing  Date,  provide to  representatives  of the
Exchanging  Partners  reasonable  access to the offices,  books,  agreements and
records of ONS and its Subsidiaries and Newco, and furnish to representatives of
the  Exchanging   Partners  such  financial  and  operational   data  and  other
information  with respect to the business and assets of ONS and its Subsidiaries
and Newco as the  Exchanging  Partners may  reasonably  request.  The Exchanging
Partners agree at all times through the Closing Date to use reasonable  efforts,
at least as  stringent  as those  employed  by them  with  respect  to their own
confidential information,  (a) to keep confidential all such information that is
identified as being of a confidential  nature,  (b) not to use such confidential
information  on their own behalf,  except in  connection  with the  transactions
contemplated  hereby, or on behalf of any other person,  firm or entity, and (c)
not to disclose such confidential  information to any third party (other than to
the Exchanging

                                       B-9

<PAGE>
Partners'  various  counsel,  accountants and other  consultants in connection
with the  transactions  contemplated  hereby)  without  ONS'  advance  written
authorization;  provided,  however,  that the Exchanging  Partners shall have no
such obligations with respect to confidential  information that (i) was lawfully
obtained  by them not  subject to  restrictions  of  confidentiality;  (ii) is a
matter of public knowledge; or (iii) has been or is hereafter publicly disclosed
other than by or through the Exchanging Partners. In the event this Agreement is
terminated,  the Exchanging  Partners will return to ONS all documents and other
materials  furnished to any one or more of the Exchanging  Partners  relating to
the transactions  contemplated  hereunder,  whether obtained before or after the
execution of this  Agreement.  In the event of a breach or threatened  breach by
the  Exchanging  Partners  of the  provisions  of this  SECTION 5.6 ONS shall be
entitled to an injunction  restraining such Exchanging Partners from disclosing,
in whole or in part, such information.  The Exchanging Partners investigation of
the financial and operating data,  assets,  real property and other  information
with respect to the business  and assets of ONS and its  Subsidiaries  and Newco
shall in no way affect the  obligations  of ONS with respect to the  agreements,
representations,  warranties, covenants and indemnification provisions set forth
in this Agreement.

 5.7 WAIVER OF RIGHT OF FIRST REFUSAL UNDER THE PARTNERSHIP AGREEMENT

   Pursuant to Section 13.09(b) of the Partnership Agreement,  ONS, OrionSat and
each of the Exchanging  Partners hereby amend the Partnership  Agreement,  as of
the date hereof,  to the extent necessary to cause Section 10.04 thereof,  which
section contains the partners' right of first refusal with respect to the sale
of limited partnership interests of Orion Atlantic, not to apply to the Exchange
or any of the transactions referred to in this Agreement,  and hereby waives any
rights  it may have  under  Section  10.04 of the  Partnership  Agreement,  with
respect  to  the  Exchange  or  any  of the  transactions  referred  to in  this
Agreement.

 5.8 CONVERTIBLE SUBORDINATED DEBENTURES

   It is  presently  contemplated  that  Newco  will,  as of the  Closing  Date,
complete an offering  (the  "Convertible  Subordinated  Debenture  Offering") of
approximately  $100  million of  convertible  subordinated  debentures  of Newco
("Convertible Subordinated Debentures"). ONS shall use its good faith efforts to
cause  Newco  to  complete  the  Convertible  Subordinated  Debenture  Offering.
Notwithstanding the foregoing,  the parties acknowledge and agree that the terms
of a Convertible  Subordinated Debenture Offering are likely to be determined in
large  part  by  the  requirements  of  prospective   investors  in  Convertible
Subordinated Debenture Offering, and that Newco and ONS reserve the right not to
proceed with a Convertible  Subordinated  Debenture  Offering if they  determine
that such Convertible  Subordinated  Debenture Offering would not be in the best
interest  of the  stockholders  of Newco or the  stockholders  of ONS (who would
become  stockholders of Newco in the Merger)  generally,  including the entities
who would be  becoming  stockholders  of Newco  pursuant to the  Exchange).  ONS
agrees to inform the Exchanging Partners periodically and in a timely fashion of
the progress of the Convertible  Subordinated Debenture Offering,  including the
terms being proposed by the  underwriters or placement  agents thereof,  and the
Exchanging  Partners  may advise ONS of their views  regarding  the terms of the
Convertible  Subordinated  Debenture  Offering.  ONS  intends  for  Newco to use
BAe's $50 million expected payment for Convertible Subordinated Debentures and
an  additional  $10 million of the proceeds of the offering for the financing of
Orion 2. While not intended to be legally  binding,  BAe hereby confirms that it
intends  to  purchase  from  Newco  $50  million  of  Convertible   Subordinated
Debentures on  substantially  the same terms as the remainder of the offering of
the Convertible Subordinated Debentures.

 5.9 AGREEMENT REGARDING TRANSFER

   Concurrent  with the  Closing,  each  Exchanging  Partner  will enter into an
agreement, in the form set forth as Exhibit E hereto,  regarding the transfer of
the shares of Newco Common Stock issuable upon conversion of the Newco Preferred
Stock.

 5.10 RELEASE OF CLAIMS

   Concurrently  with the Closing,  each of the parties hereto agrees to release
and  forever  discharge  each of the  other  parties  hereto  and  each of their
Affiliates  from and after the  Closing,  from and  against  any and all rights,
causes  of  action,  claims,  suits,  obligations,   liabilities,   and  demands
whatsoever (other

                                      B-10

<PAGE>

than  those  arising  from  fraud or  misrepresentation),  in law or in  equity,
whether  presently known or unknown,  to the fullest extent  permitted by law by
reason  of,  related  to, or  arising  out of any one or more of the  agreements
referred to in Section 3.2 hereof (other than this Agreement).

 5.11 LEGEND, REMOVAL

   Each certificate or instrument  representing  Newco Preferred Stock (or Newco
Common Stock received upon the conversion thereof or as dividends thereon) shall
be  imprinted  with a legend to the  effect  that the  securities  have not been
registered  under the  Securities  Act and may not be transferred or sold except
pursuant to an effective  registration  under the  Securities Act and applicable
state  securities  laws or an available  exemption  from such  registration.  In
connection with the transfer of any Newco Preferred Stock (or Newco Common Stock
received  upon the  conversion  thereof  or as  dividends  thereon)  other  than
pursuant to an effective registration statement filed by ONS, the holder thereof
shall  deliver  written  notice to Newco  describing  in  reasonable  detail the
transfer or proposed  transfer,  together  with an opinion of counsel  which (to
Newco's  reasonable  satisfaction) is knowledgeable in securities law matters to
the  effect  that such  transfer  of such  securities  may be  effected  without
registration of such securities  under the Securities Act. Upon issuance of such
opinion (to the extent it relates to Newco  Preferred  Stock) or  acceptance  of
such  opinion  by  Newco's  transfer  agent (to the extent it relates to Newco
Common Stock),  Newco shall promptly upon such contemplated  transfer deliver or
caused to be delivered new  certificates  for such securities  which do not bear
the  Securities  Act legend  referred to above in this  paragraph.  If any Newco
Preferred  Stock (or Newco Common Stock received upon the conversion  thereof or
as dividends  thereon) becomes eligible for sale pursuant to Rule 144(k),  Newco
shall,  upon the  request of the holder of such  securities  (together  with the
opinion  referred  to  above  in this  paragraph,  which  shall  state  that the
provisions of Rule 144(k) have been complied  with),  remove the legend referred
to above in this paragraph from the certificates for such securities.

 5.12 TAX-FREE STATUS

   No  party  hereto  shall,  nor  shall  any  party  hereto  permit  any of its
affiliates to, take any action, or omit to take any required action, that would,
or would be reasonably  likely to,  adversely  affect the  qualification  of the
Merger and the Exchange,  taken together, as a tax-free transaction described in
Code Section 351(a).  Each party hereto shall,  for all tax purposes,  treat the
Merger and the Exchange,  taken together, as a tax-free transaction described in
Code Section 351(a).

6. REPRESENTATIONS AND WARRANTIES OF EXCHANGING PARTNERS

   Each of the Exchanging  Partners hereby severally  represents and warrants to
ONS as follows (provided that the  representations and warranties in SECTION 6.8
are made solely by Lockheed Martin):

 6.1 TITLE TO LP INTERESTS; OTHER LP RIGHTS

   Such Exchanging Partner is, and on the Closing Date will be, the lawful owner
of the LP Interest of such Exchanging  Partner,  and such Exchanging Partner (or
such  Exchanging  Partner's  Affiliate,  as the case  may  be),  is and on the
Closing  Date will be,  the  lawful  owner of such  Exchanging  Partner's  (or
Affiliate's)  Other LP Rights,  as listed in SECTION 3.2.  Except as set forth
below,  such  Exchanging  Partner has,  and on the Closing Date such  Exchanging
Partner  will have,  good,  valid and  marketable  title,  free and clear of all
Encumbrances, to the LP Interest of such Exchanging Partner, and such Exchanging
Partner (or such Exchanging Partner's Affiliate, as the case may be), has, and
on the Closing Date will have, good, valid and marketable  title, free and clear
of all Encumbrances,  to such Exchanging Partner's (or Affiliate's) Other LP
Rights,  as listed in  SECTION  3.2,  in each  case with full  right and  lawful
authority to transfer  the LP Interest and Other LP Rights to Newco  pursuant to
this Agreement.  Notwithstanding the foregoing, the parties acknowledge that the
LP Interests and certain of the Other LP Rights are pledged to the Lenders under
the Credit  Facility  Documentation,  and that the LP  Interests  are pledged to
Orion Atlantic under the respective Contingent Capacity Agreements.

                                      B-11

<PAGE>
 6.2 ORGANIZATION AND STANDING; CAPACITY

   Such Exchanging Partner is a corporation duly organized, validly existing and
in good standing under the laws of its respective jurisdiction, and has the full
corporate  power and authority to carry on its business as currently  conducted.
Each  Exchanging  Partner has full legal right,  capacity,  power and  authority
(corporate or otherwise) to execute and deliver this Agreement and to consummate
the transactions contemplated hereby.

 6.3 AUTHORIZATION

   The execution,  delivery and  performance  by the Exchanging  Partner of this
Agreement and all other documents  contemplated  hereby,  the fulfillment of and
the compliance with the respective terms and provisions hereof and thereof,  and
the consummation of the transactions  contemplated  hereby and thereby have been
duly  authorized  by the Board of Directors of such  Exchanging  Partner  (which
authorization  has not been  modified  or  rescinded  and is in full  force  and
effect),  and will not: (a) conflict  with, or materially  violate any provision
of,  any law  having  applicability  to such  Exchanging  Partner  or any of its
Affiliates  which is a party to any agreement with or relating to Orion Atlantic
or any term or provision of the articles of incorporation  or  organization,  or
bylaws  or  operating  agreement  of  such  Exchanging  Partner  or any of  such
Affiliates,  as  applicable;  or (b)  conflict  with,  or result in any material
breach of, or constitute a material  default under,  any agreement to which such
Exchanging  Partner  or any of such  Affiliates  is a  party  or by  which  such
Exchanging Partner or any of such Affiliates may be bound.

 6.4 RESTRICTIONS AND CONSENTS

   Except for certain approvals which may be required by the Japanese government
if TA Sat becomes an Exchanging Partner, there are no agreements,  laws or other
restrictions  of any kind to which such  Exchanging  Partner is party or subject
that would prevent or restrict the  execution,  delivery or  performance of this
Agreement.

 6.5 BINDING OBLIGATION

   This Agreement  constitutes a valid and binding obligation of such Exchanging
Partner,  enforceable in accordance with its terms. Each document to be executed
by such  Exchanging  Partner  pursuant  hereto,  when  executed and delivered in
accordance with the provisions hereof, will be a valid and binding obligation of
such Exchanging Partner, enforceable in accordance with its terms.

 6.6 TRANSFER OF TITLE

   At the Closing,  Newco will acquire good,  valid and marketable title to such
Exchanging  Partner's  LP Interest and such  Exchanging  Partner's  Other LP
Rights,  free and clear of all  Encumbrances,  other than  those  imposed by the
terms of the  Partnership  Agreement  and  restrictions  on resale  contained in
federal and state securities laws.

 6.7 ACCREDITED INVESTORS

   Each Exchanging Partner and any Affiliate of such Exchanging Partner who will
be receiving Newco  Preferred Stock is an "accredited  investor" as such term is
defined in Rule 501 of the Securities Act.

 6.8 NAME CHANGE OF LOCKHEED MARTIN

   Lockheed  Martin only hereby  represents  and  warrants  that it was formerly
named Martin Marietta  Commercial  Launch  Services,  Inc., that it is a limited
partner of Orion Atlantic and a party to the  agreements  referred to in Section
3.2(a)(iv)  and that it has  provided  evidence  of its name change to the other
parties hereto.

7. REPRESENTATIONS AND WARRANTIES OF ONS

   ONS hereby represents and warrants to the Exchanging Partners as follows:

                                      B-12

<PAGE>
 7.1 ORGANIZATION AND STANDING

   ONS is a corporation  duly organized,  validly  existing and in good standing
under the laws of the State of Delaware,  and has the full  corporate  power and
authority  to carry on its  business as  currently  conducted.  ONS has the full
legal right,  capacity,  power and authority (corporate or otherwise) to execute
and deliver  this  Agreement  and the other  documents  called for herein and to
consummate the transactions  contemplated  hereby. ONS is qualified as a foreign
corporation in the State of Maryland,  and in every other  jurisdiction in which
the failure to so qualify would have a Material Adverse Effect.

 7.2 AUTHORIZATION

   The  execution,  delivery and  performance  by ONS of this  Agreement and the
other documents  contemplated hereby, the fulfillment of and the compliance with
the respective terms and provisions hereof and thereof,  and the consummation of
the  transactions  contemplated  hereby and thereby have been duly authorized by
the Board of  Directors  of ONS (which  authorization  has not been  modified or
rescinded and is in full force and effect),  and will not: (a) conflict with, or
materially violate any provision of, any law having  applicability to ONS or any
of its Affiliates or any term or provision of the articles of  incorporation  or
organization,  or bylaws or operating  agreement of ONS, as  applicable;  or (b)
conflict  with,  or result in any material  breach of, or  constitute a material
default under, any agreement to which ONS or any of its Affiliates is a party or
by which ONS or any of its Affiliates may be bound.

 7.3 RESTRICTIONS AND CONSENTS

   Except for certain  approvals  which are set forth on Schedule 7.3, which ONS
will use its  reasonable  efforts  to  obtain  prior to  Closing,  there  are no
agreements,  laws or other  restrictions  of any  kind to which  ONS is party or
subject that would prevent or restrict the execution, delivery or performance of
this Agreement. ONS has no reason to believe, as of the date hereof, that any of
the conclusions  reached in the memorandum from ONS's  communications  counsel
previously  circulated to the Exchanging Partners and attached hereto as Exhibit
K indicating  that the Exchange  will not  constitute a change of control of ONS
that would  require the consent of the U.S.  Federal  Communications  Commission
("FCC"),  or otherwise require the consent of that Commission,  are incorrect in
any material  respect and will promptly  notify each  Exchanging  Partner if ONS
becomes aware of any reason why any such conclusions may become  incorrect.  If,
notwithstanding such memorandum,  such FCC consent is required, ONS will use its
reasonable good faith efforts to obtain such consent prior to Closing.

 7.4 BINDING OBLIGATION

   This  Agreement  constitutes,  and the  Registration  Rights  Agreement  when
executed will constitute, valid and binding obligations of ONS and Newco, as the
case may be,  enforceable  in  accordance  with its terms.  Each  document to be
executed  by ONS or Newco  pursuant  hereto,  when  executed  and  delivered  in
accordance with the provisions hereof, will be a valid and binding obligation of
ONS or Newco, enforceable in accordance with its terms.

 7.5 ISSUANCE OF SHARES

   Upon  consummation  of the  transactions  contemplated  by this  Agreement at
Closing,  the Newco Preferred Stock will be duly and validly issued,  fully paid
and nonassessable and no personal  liability  attaches to the ownership thereof,
and the Exchanging  Partners will acquire the legal,  valid and marketable title
to the Newco Preferred Stock, free and clear of all Encumbrances,  except as set
forth in this Agreement.

 7.6 CAPITALIZATION

   As of the date  hereof,  the  authorized  capital  stock of ONS  consists  of
40,000,000  shares of ONS Common Stock and 1,000,000  shares of preferred stock,
par value $.01 per share, of which 10,945,133 shares of ONS Common Stock, 13,961
shares of ONS  Series A  Preferred  Stock and  4,211,001  shares of ONS Series B
Preferred  Stock are duly authorized and validly issued and  outstanding,  fully
paid and

                                      B-13

<PAGE>
nonassessable.  ONS has no  other  class  of stock  authorized  or  outstanding.
Options  and  warrants  to  purchase  1,396,851  shares of ONS Common  Stock are
outstanding  on the date  hereof,  and when such options are  exercised  and the
prescribed  exercise  price  paid,  the shares of ONS Common  Stock  issued with
respect to such options will be duly authorized,  validly issued, fully paid and
nonassessable.  Options to purchase  350.666  shares of ONS preferred  stock are
outstanding  on the date  hereof,  the  terms of which  are to be  substantially
identical  to the ONS Series A  Preferred  Stock and the ONS Series B  Preferred
Stock other than the  conversion  price.  Except as set forth  above,  or in the
certificates  of designations of the ONS Series A Preferred Stock and ONS Series
B Preferred Stock, as of the date hereof there are no existing options, warrants
or rights to purchase or otherwise  acquire from ONS capital stock of ONS of any
class,  no  outstanding  securities of ONS that are  convertible  into shares of
capital  stock of ONS of any  class,  and no  options,  warrants  or  rights  to
purchase from ONS any such  convertible  securities,  and ONS has no outstanding
contractual or other obligation to repurchase,  redeem or otherwise  acquire any
outstanding shares of its capital stock. Upon the issuance of Newco Common Stock
upon  the  conversion  of the  Newco  Preferred  Stock  in  accordance  with the
Certificate  of  Designations,  such Newco Common Stock will be duly and validly
issued,  fully paid and  non-assessable and no personal liability will attach to
the ownership  thereof.  As of the Closing Date, Newco will have reserved out of
its authorized but unissued shares of Newco Common Stock,  solely for issue upon
such  conversion,  the number of shares  necessary for such  purpose.  As of the
Closing Date,  Newco will have sufficient  authorized  capital stock  (including
Newco  Preferred  Stock)  to meet its  obligations  hereunder.  The  issued  and
outstanding  shares of ONS capital stock have not been, and the Newco  Preferred
Stock to be issued to the Exchanging  Partners hereunder (and Newco Common Stock
issuable  upon the  conversion  thereof) will not be, issued in violation of any
preemptive or other rights of any person,  whether arising by statute, under the
Certificate of Incorporation or By-Laws of Newco or in any other manner.

 7.7 NO LIABILITIES

   Except as set forth in the consolidated  audited financial  statements of ONS
as of December  31, 1995,  and for the period  ended on such date (the  "Current
Financial Statements"),  or included in the Disclosure Materials, there exist no
material  liabilities  (whether  contingent  or absolute,  matured or unmatured,
known or unknown) of ONS or any  Subsidiary.  Immediately  prior to the Closing,
Newco will have no liabilities  (other than de minimis  liabilities  relating to
Newco's  formation,  any  liabilities or obligations  relating to transactions
contemplated by this Agreement, and any liabilities for expenses relating to the
Credit Facility Refinancing, Bond Offering, Bank Agreement Termination, Capacity
Agreement Termination and Convertible Subordinated Debenture Offering).

 7.8 TAXES

   ONS and each  Subsidiary has filed or has caused to be filed (or has obtained
extensions  with respect to) all material  federal,  state and local tax returns
which are  required  to be filed and has paid in full or  accrued  all  material
federal,  state  and  local  taxes,   estimated  taxes,   interest,   penalties,
assessments and deficiencies  assessed in connection with such returns.  Neither
ONS nor any Subsidiary is a party to any pending  action or  proceeding,  and to
the  knowledge  of ONS  there is no  action  or  proceeding  threatened,  by any
governmental  authority for assessment or collection of taxes, and no unresolved
claim for assessment or collection of taxes has been asserted against ONS or any
Subsidiary, which would have a Material Adverse Effect.

 7.9 SUBSIDIARIES

   Schedule  7.9  hereto  sets  forth  the name of each  Subsidiary  and  ONS'
ownership in such entity. Each Subsidiary is a corporation, or partnership, duly
organized,  validly existing and in good standing under the laws of its state of
incorporation  or  organization,  and  each  has the full  corporate  power  and
authority to carry on its business as it is now being conducted. Each Subsidiary
is qualified in every jurisdiction in which the failure to so qualify would have
a Material Adverse Effect.

                                      B-14

<PAGE>
 7.10 BOOKS AND RECORDS

   The books of account, stock record, minute books and other records of ONS and
its  Subsidiaries   have  been  maintained  in  accordance  with  good  business
practices,  and the matters  contained  therein are appropriately and accurately
reflected in the Current Financial Statements.

 7.11 LITIGATION

   Except as set forth in the  Disclosure  Materials and Schedule 7.11 regarding
the Skydata matter, there are no material claims, actions, suits, proceedings or
investigations  pending or, to the knowledge of ONS,  threatened or  anticipated
against,  affecting  or  involving  ONS or any  Subsidiary  or the  transactions
contemplated  by this  Agreement,  at law or in  equity,  or before  any  court,
arbitrator or governmental authority,  domestic or foreign.  Neither ONS nor any
Subsidiary  is  operating  under,  subject to or in default  with respect to any
order, judgment,  injunction or decree of any court,  arbitrator or governmental
authority, domestic or foreign that would have a Material Adverse Effect, except
for orders of the Federal Communications  Commission pertaining to the authority
of ONS to conduct its operations, and with respect to such orders ONS is in full
compliance.

 7.12 SEC FILINGS

   Since  August  1,  1995,  all  reports,  proxy  statements  and  registration
statements  required to be filed by ONS with the SEC pursuant to the  Securities
Act, and the  Securities  and Exchange Act of 1934, as amended (the "1934 Act"),
have been timely filed with the SEC and complied in all material  respects  with
the  requirements  of the  Securities  Act,  the  1934  Act  and the  rules  and
regulations  under the  Securities  Act and 1934 Act, and none of such  reports,
proxy  statements or registration  statements  contained as of their  respective
dates any untrue  statement  of a  material  fact or omitted to state a material
fact required to be stated  therein or necessary in order to make the statements
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading.  In addition,  the Merger Proxy  Statement  insofar as it relates to
ONS,  as of the date of  mailing  of the Merger  Proxy  Statement  by ONS to its
stockholders  and as of the date of the ONS  stockholders  meeting to which such
Merger Proxy Statement  relates,  (i) will comply in all material  respects with
the provisions of the 1934 Act and the rules and regulations thereunder and (ii)
except  with  respect to any  information  relating to the  Exchanging  Partners
provided to ONS by the Exchanging  Partners in writing  specifically  for use in
the Merger Proxy  Statement,  will not contain an untrue statement of a material
fact or omit to state a material fact required to be stated therein or necessary
to make the statements  therein,  in light of the circumstances under which they
were made, not misleading.

 7.13 TRANSACTIONS WITH EXCHANGING PARTNERS

   Neither ONS nor any of its Affiliates currently is a party to any transaction
or agreement with any of the Exchanging Partners or their Affiliates relating to
the Exchange,  other than this Agreement and the agreements contemplated hereby,
that has not been  disclosed  to each of the  Exchanging  Partners or  otherwise
publicly disclosed by ONS.

 7.14 ABSENCE OF VIOLATIONS

   Neither  ONS nor any of its  Subsidiaries  is in  default  under,  nor has it
breached,  any  material  term  or  material  provision  of its  Certificate  of
Incorporation or By-laws or any Material Contract. ONS and its Subsidiaries have
complied with and are in full compliance with all Laws,  where the failure to so
comply would have a Material Adverse Effect.

8. RESTRICTED SECURITIES

   Each Exchanging Partner hereby severally  represents,  warrants and covenants
to ONS as follows:

 8.1 NO REGISTRATION UNDER THE SECURITIES ACT

   Such  Exchanging  Partner  understands  that the Newco  Preferred Stock to be
acquired by it under this  Agreement,  and the Newco Common Stock  issuable upon
the conversion  thereof,  have not been registered  under the Securities Act, in
reliance upon exemptions contained in the Securities Act or

                                      B-15

<PAGE>
interpretations  thereof,  and cannot be  offered  for sale,  sold or  otherwise
transferred  unless  subsequently  so registered  or qualify for exemption  from
registration  under the Securities Act. The Newco Preferred Stock, and the Newco
Common Stock issuable upon the conversion thereof, will not be offered for sale,
sold  or  otherwise  transferred  by  such  Exchanging  Partner  without  either
registration or exemption from registration under the Securities Act.

 8.2 ACQUISITION FOR INVESTMENT

   The Newco  Preferred  Stock  being  acquired  under  this  Agreement  by such
Exchanging  Partner is being  acquired in good faith solely for such  Exchanging
Partner's own account,  for investment and not with a view toward distribution
within the meaning of the Securities  Act. Such  Exchanging  Partner has, and at
the time of  Closing  such  Exchanging  Partner  will have,  no present  plan or
intention  to sell or  otherwise  dispose  of the Newco  Preferred  Stock  being
acquired  under this  Agreement  or any Newco  Common  Stock  issuable  upon the
conversion  of  such  Newco  Preferred  Stock;  provided,   however,  that  such
Exchanging  Partner may decide,  from time to time,  to sell some or all of such
stock based upon a change in the investment  policy of such  Exchanging  Partner
and  provided  further,  that this  provision  shall not  restrict  MCN Sat from
transferring a portion of its Newco Preferred Stock to BAe.

 8.3 EVALUATION OF MERITS AND RISKS OF INVESTMENT

   Such  Exchanging  Partner has such  knowledge and experience in financial and
business  matters  that such  Exchanging  Partner is capable of  evaluating  the
merits and risks of its investment in the Newco  Preferred  Stock being acquired
hereunder.  Such Exchanging Partner understands and is able to bear any economic
risks  associated  with such  investment  (including,  without  limitation,  the
necessity of holding the Newco Preferred Stock for an indefinite period of time,
inasmuch  as the  Newco  Preferred  Stock  have not been  registered  under  the
Securities Act).

 8.4 REVIEW OF DOCUMENTS

   Such Exchanging Partner and its advisers, if any, have received, and have had
a reasonable opportunity to review, the following documents  (collectively,  the
"Disclosure  Materials"):  (i) Annual Report on Form 10-K for ONS for the fiscal
year ended December 31, 1995; (ii) Quarterly Report on Form 10-Q for ONS for the
fiscal  quarter ended March 31, 1996;  (iii) Proxy  Statement of ONS relating to
the Annual  Meeting of  Stockholders  to be held on May 23, 1996;  and (iv) Risk
Factors Relating to Orion and Description of Capital Stock of Orion.

 8.5 OPPORTUNITY TO REQUEST INFORMATION

   Such  Exchanging  Partner and its  advisers,  if any,  have had a  reasonable
opportunity  to ask  questions  of and receive  information  and answers  from a
person  or  persons  acting  on  behalf  of  ONS  concerning  the   transactions
contemplated by this Agreement and all such questions have been answered and all
such information has been provided to their full satisfaction. If this Agreement
is not  terminated on or before the Newco  Finalization  Date,  such  Exchanging
Partner and its advisers,  if any, as of the Newco  Finalization Date, will have
had a reasonable  opportunity  to ask questions of and receive  information  and
answers  from a person or  persons  acting on  behalf  of Newco  concerning  the
transactions  contemplated  by this  Agreement and all such  questions will have
been  answered and all such  information  will have been  provided to their full
satisfaction.  In making  their  investment,  the  Exchanging  Partners  will be
relying  solely on their  review of the  Disclosure  Materials  (other  than any
projections   included   therein,   which  are  not  being  relied  upon),   the
representations  and warranties set forth herein, the Newco Formation  Documents
and the Merger  Documents,  and the documents  made available for inspection and
the answers to questions referred to in this SECTION 8.5.

9. CONDITIONS PRECEDENT TO OBLIGATIONS OF THE EXCHANGING PARTNERS

   The obligations of each of the Exchanging  Partners (and of Lockheed  Martin,
in the case of the condition in Section 9.8) under this Agreement are subject to
the fulfillment, at or prior to the Closing, of each of the following conditions
(other than those in SECTION 9.8, which are a condition only to the

                                      B-16

<PAGE>
obligations of Lockheed Martin), and failure to satisfy any such condition shall
excuse and discharge all obligations of each of the Exchanging  Partners (and of
Lockheed Martin only, in the case of failure of the condition in SECTION 9.8) to
carry out the provisions of this Agreement,  unless such failure is agreed to in
writing by each of the Exchanging  Partners (and of Lockheed Martin only, in the
case of the condition in SECTION 9.8):

 9.1 REPRESENTATIONS AND WARRANTIES

   The  representations  and warranties  made by ONS in this Agreement  shall be
true and  complete  in all  material  respects  when made,  and on and as of the
Closing Date as though such  representations  and warranties were made on and as
of such date.

 9.2 PERFORMANCE

   ONS and OrionSat shall have  performed and complied in all material  respects
with all agreements and covenants  required by this Agreement to be performed or
complied with by ONS and/or OrionSat prior to the Closing Date.

 9.3 DOCUMENTS AT CLOSING

   All  documents  required to be  furnished  by Newco,  ONS and OrionSat to the
Exchanging Partners prior to or at the Closing shall have been so furnished.

 9.4 REFINANCING OF CREDIT FACILITY, CANCELLATION OF CAPACITY AGREEMENTS

   The Credit Facility Refinancing and Capacity Agreement Termination shall have
been completed,  other than any actions to be taken by such Exchanging  Partner,
and  the  documents  effecting  the  Capacity  Agreement  Termination  shall  be
substantially in the form of Exhibit H hereto or otherwise in form and substance
reasonably  satisfactory to each Exchanging Partner.  Evidence of the completion
of the Capacity Agreement  Termination and Credit Facility  Refinancing shall be
the execution of Exhibit H by Chase and the  unconditional  delivery of the same
at Closing.

 9.5 CONSENTS

   ONS and OrionSat  shall have received all material  consents,  authorizations
and approvals of governmental,  supragovernmental  and private parties listed on
Schedule  7.3 which are  required  to be  obtained  in order to  consummate  the
transactions contemplated hereby.

 9.6 REGISTRATION

   The  Registration  Rights Agreement shall have been executed and delivered by
Newco.

 9.7 SATELLITE CONTRACT

   ONS or one of its affiliates shall have entered into a satellite  procurement
contract  (the  "Orion 2 Satellite  Contract")  with Matra  Marconi  Space or an
affiliate  thereof ("Matra Marconi  Space") for the  construction  and launch of
Orion 2, ONS or one of its  affiliates  shall have  given  Matra  Marconi  Space
notice to proceed under such contract and Amendment No. 10 between Matra Marconi
Space and Orion  Atlantic to the Second  Amended and  Restated  Contract,  dated
September 26, 1991, as amended  shall have become  effective and Orion  Atlantic
shall not be in default under such Amendment No.
10.

 9.8 LAUNCH SUB CONTRACT

   Lockheed Martin and Matra Marconi Space shall have entered into a subcontract
to the Orion 2 Satellite Contract relating to the launch of Orion 2.

 9.9 NEWCO FORMATION

   The Newco Formation  Documents shall be consistent with the requirement  that
Newco  be  substantially  identical  in all  material  respects  to ONS,  or any
discrepancies  shall  be  reasonably   acceptable  to  the  Exchanging  Partners
(provided, however, that such condition shall be deemed to have been satisfied,

                                      B-17

<PAGE>
and shall  terminate,  and be of no further force and effect,  if this Agreement
shall not have been terminated on or before the Newco  Finalization  Date);  and
the Newco Formation shall have occurred in accordance with SECTION 2.

 9.10 MERGER

   The Merger shall have occurred, or shall occur concurrently with the Closing,
in accordance with Section 4.

 9.11 TAX OPINION

   The  Exchanging  Partners  shall have received an opinion from Ernst & Young,
LLP, tax advisors to Newco, in form and substance reasonably satisfactory to the
Exchanging  Partners,  dated the  Closing  Date,  which  opinion may be based on
appropriate  representations  of the  parties  hereto,  in  form  and  substance
reasonably  satisfactory to such tax advisors, to the effect that the Merger and
the Exchange,  taken  together,  will be a tax-free  exchange  described in Code
Section 351(a).

10. CONDITIONS PRECEDENT TO OBLIGATIONS OF ONS AND ORIONSAT

   The  obligations  of ONS and OrionSat under this Agreement are subject to the
fulfillment,  at or prior to the Closing,  of each of the following  conditions,
and  failure to satisfy  any such  condition  shall  excuse  and  discharge  all
obligations of ONS and OrionSat to carry out the  provisions of this  Agreement,
unless such failure is agreed to in writing by ONS and OrionSat:

 10.1 REPRESENTATIONS AND WARRANTIES

   The  representations  and warranties made by the Exchanging  Partners in this
Agreement shall be true and complete in all material  respects when made, and on
and as of the Closing Date as though such  representations  and warranties  were
made on and as of such date, except for any changes expressly  permitted by this
Agreement.

 10.2 PERFORMANCE

   The  Exchanging  Partners shall have performed and complied with all material
agreements and covenants  required by this Agreement to be performed or complied
with prior to the Closing Date.

 10.3 DOCUMENTS AT CLOSING

   All documents required to be furnished by the Exchanging  Partners to ONS and
OrionSat prior to or at the Closing shall have been so furnished.

 10.4 CONSENTS

   The  Exchanging   Partners   shall  have  received  all  material   consents,
authorizations  and  approvals of  governmental,  supragovernmental  and private
parties  which  are  required  to  be  obtained  in  order  to  consummate   the
transactions contemplated hereby.

 10.5 REFINANCING OF CREDIT FACILITY, CANCELLATION OF CAPACITY AGREEMENTS

   The Credit  Facility  Refinancing,  Bank Agreement  Termination  and Capacity
Agreement  Termination  shall have been completed,  other than any actions to be
taken by ONS and OrionSat.

 10.6 PARTNERSHIP AGREEMENT AMENDMENT

   The Partnership  Agreement shall have been amended as contemplated by SECTION
5.4, other than due to any actions to be taken by ONS and OrionSat.

                                      B-18

<PAGE>



 10.7 CONSENTS OF THE ONS STOCKHOLDERS

   The ONS  Stockholder  Consent has been obtained for the Merger,  the Exchange
and any related transactions requiring stockholder consent.

 10.8 COMPLETION OF FINANCING FOR A SECOND SATELLITE

   Newco shall have raised at least $100  million  from the sale of  Convertible
Subordinated   Debentures,   not  including  any  amounts   representing  or  in
satisfaction  of any  amounts  due by ONS or Orion  Atlantic  to any  Exchanging
Partner or Affiliate thereof,  and BAe shall have purchased at least $50 million
of Convertible Subordinated Debentures from Newco.

 10.9 SATELLITE CONTRACT

   ONS or one of its  affiliates  shall have  entered into the Orion 2 Satellite
Contract with Matra Marconi Space for the construction and launch of Orion 2.

 10.10 NEWCO FORMATION

   The Newco Formation shall have occurred in accordance with SECTION 2.

 10.11 MERGER

   The  Merger  shall  have  occurred,  or be  occurring  concurrently  with the
Closing,  in  accordance  with  Section  4; and no ONS  stockholder  (or  former
stockholder  of ONS,  if the  Merger  already  shall have  occurred)  shall have
delivered  to  ONS  a  written  notice  of  such   stockholder's   (or  former
stockholder's)  intention,  or otherwise indicated an intention, to dissent to
the Merger or  otherwise  seek to  exercise  any right to sell to ONS, or obtain
payment from ONS for,  such  stockholder's  stock in ONS in lieu of such stock
being converted in the Merger to stock of Newco.

11.0 CLOSING

 11.1 CLOSINGS

   (a) Deposit into Escrow
Simultaneously  with  execution and delivery of this  Agreement,  the Exchanging
Partners are entering into an Escrow Agreement in the form attached as Exhibit J
and depositing into escrow with one counsel selected by the Exchanging  Partners
(which may be counsel  representing  one or more of the  Exchanging  Partners in
other  capacities),  acting  as  escrow  agent,  executed  copies of each of the
documents to be delivered by the Exchanging  Partners to Newco,  ONS or OrionSat
at the Closing.  Each of the parties hereto agrees to abide by the terms of such
Escrow Agreement.

   (b) Closing
Subject to the terms and  conditions of this  Agreement,  the Closing shall take
place at the offices of Hogan & Hartson  L.L.P.,  555 Thirteenth  Street,  N.W.,
Washington, D.C. 20004 on the Closing Date.

 11.2 DELIVERIES BY THE EXCHANGING PARTNERS

   At or prior to the Closing,  the Exchanging  Partners shall deliver to Newco,
ONS or OrionSat, as applicable, the following:

   (a)  documents  of transfer of  partnership  interests  and  substitution  of
limited  partners with respect to the LP Interests  being  transferred  to Newco
pursuant to SECTION 2, in the form attached as Exhibit F;

   (b) documents transferring the rights included in the Other LP Rights, in the
form attached as Exhibit G.

                                      B-19

<PAGE>
   (c) counterparts to the Third Amended and Restated Partnership Agreement duly
executed by each of the Exchanging Partners;

   (d) a certified copy of the resolutions  adopted by the Board of Directors of
each of the Exchanging  Partners  authorizing the  transactions  contemplated by
this Agreement; and

   (e) such other  documents as Newco,  ONS or OrionSat may reasonably  request,
including  without  limitation  certificates  of the officers of the  Exchanging
Partners as to the matters set forth in Sections 10.1 and 10.2.

 11.3 DELIVERIES BY ONS AND NEWCO

   At or prior to the Closing,  Newco,  ONS or OrionSat,  as  applicable,  shall
deliver to the Exchanging Partners the following:

   (a)  certificates  representing the Newco Preferred Stock being issued to the
Exchanging Partners pursuant to SECTION 2;

   (b) the Registration Rights Agreement, duly executed by Newco;

   (c) evidence in the form of the documents included as Exhibit H hereto,  duly
executed and delivered by all parties  thereto other than  Exchanging  Partners,
that the Capacity Termination  Agreement has been effected and that the Capacity
Guarantees have been terminated in their entirety;

   (d) a certified copy of the resolutions adopted by the Boards of Directors of
Newco,  ONS and  OrionSat  authorizing  the  transactions  contemplated  by this
Agreement;

   (e) evidence of receipt of the ONS Stockholder Consent;

   (f) good standing  certificates as of a date not more than fifteen days prior
to the Closing  Date issued by the  Secretary  of State of the State of Delaware
with respect to Newco,  ONS and  OrionSat;(

   (g)  opinion(s) of counsel to  Newco  and ONS,  dated  the  Closing  Date and
addressed to the Exchanging  Partners,  substantially to the effect set forth on
Exhibit I;

   (h) an agreement by Newco to be bound by the indemnity  provisions of SECTION
12 (the "Newco Indemnity"); and

   (i) such other documents as the Exchanging  Partners may reasonably  request,
including without limitation certificates of the officers of Newco and ONS as to
the matters set forth in SECTIONS 9.1 and 9.2.

 11.4 ORDER OF EFFECTIVENESS

   Of the documents being  delivered by the Exchanging  Partners at the Closing,
the  counterparts to the Third Amended and Restated  Partnership  Agreement duly
executed by each of the Exchanging Partners shall be deemed delivered first, and
upon  signature by ONS and OrionSat the Third  Amended and Restated  Partnership
Agreement shall be deemed in full force and effect, prior to delivery of the (i)
documents  of transfer of  partnership  interests  and  substitution  of limited
partners with respect to the LP Interests being transferred to Newco pursuant to
SECTION 2, in the form  attached as Exhibit F, and (ii)  documents  transferring
the rights included in the Other LP Rights, in the form attached as Exhibit G.

12. SURVIVAL OF REPRESENTATIONS; INDEMNIFICATION; REMEDIES

 12.1 SURVIVAL OF REPRESENTATIONS

   All representations,  warranties, covenants, indemnities and other agreements
made by any party to this  Agreement  herein or  pursuant  hereto  shall also be
deemed  made on and as of the  Closing  Date  as  though  such  representations,
warranties, covenants, indemnities and other agreements were made on

                                      B-20

<PAGE>
and as of  such  date,  and all  such  representations,  warranties,  covenants,
indemnities   and  other   agreements   shall   survive   the  Closing  and  any
investigation, audit or inspection at any time made by or on behalf of any party
hereto, including the review of the Disclosure Materials under SECTION 8.4.

 12.2 AGREEMENT OF NEWCO, ONS AND ORIONSAT TO INDEMNIFY

   Subject to the  conditions  and  provisions  of this  SECTION  12.2,  ONS and
OrionSat  jointly and  severally  shall (and Newco shall,  pursuant to the Newco
Indemnity) jointly and severally indemnify, defend and hold harmless each of the
EP Indemnified Persons from and after the Closing Date against and in respect of
all Claims  asserted  against,  resulting to, imposed upon or incurred by any of
the EP  Indemnified  Persons  (whether such Claims are by,  against or relate to
Newco,  ONS or OrionSat or any other party,  including,  without  limitation,  a
governmental entity), directly or indirectly, by reason of or resulting from any
of the following:

   (i) any of the  matters  with  respect to which they  would be  obligated  to
indemnify the EP Indemnified  Persons under Section  7.09(e) of the  Partnership
Agreement and which arose before or after the Closing Date,  notwithstanding the
Exchanging  Partners  ceasing to be limited partners of Orion Atlantic as of the
Closing Date; or

   (ii) any Claims  asserted  by one or more of the  Lenders or Chase,  or their
successors or assigns,  arising from and after the Closing Date under (A) any of
the Capacity  Agreements,  Contingent Capacity Agreements or Capacity Guarantees
which are  terminated  on or prior to the Closing  Date,  (B) any  agreements or
other  documents  terminated or to be  terminated  in  connection  with the Bank
Agreement Termination,  or (C) this Agreement, in each case excluding any Claims
arising from or relating to any breach of any  representation  or  warranty,  or
noncompliance  with any conditions or other agreements,  given or made by any EP
Indemnified Person under any of the agreements or documents referred to above in
this  paragraph or any document  furnished by or on behalf of any EP Indemnified
Person pursuant thereto.

 12.3 CONDITIONS OF INDEMNIFICATION.

   The obligations  and  liabilities of Newco,  ONS and OrionSat with respect to
their respective  indemnities  pursuant to the Newco Indemnity and SECTION 12.2,
resulting  from  any  Claims,  shall  be  subject  to the  following  terms  and
conditions:

   12.3.1. The party seeking indemnification (the "Indemnified Party") must give
the  other  party or  parties,  as the case may be (the  "Indemnifying  Party"),
notice of any such Claims promptly after the  Indemnified  Party receives notice
thereof;  provided  that the  failure to give such  notice  shall not affect the
rights  of the  Indemnified  Party  hereunder  except  to the  extent  that  the
Indemnifying Party shall have suffered actual damage by reason of such failure.

   12.3.2. The Indemnifying Party shall have the right to undertake,  by counsel
or other representatives of its own choosing,  the defense of such Claims at the
Indemnifying Party's risk and expense.

   12.3.3. In the event that the Indemnifying Party shall elect not to undertake
such  defense,  or, within a reasonable  time after notice from the  Indemnified
Party of any such  Claims,  shall fail to defend,  the  Indemnified  Party (upon
further  written  notice  to the  Indemnifying  Party)  shall  have the right to
undertake the defense,  compromise  or settlement of such Claims,  by counsel or
other  representatives of its own choosing, on behalf of and for the account and
risk of the Indemnifying  Party (subject to the right of the Indemnifying  Party
to assume defense of such Claims at any time prior to settlement,  compromise or
final determination thereof). In such event, the Indemnifying Party shall pay to
the  Indemnified  Party,  in  addition  to the other  sums  required  to be paid
hereunder,  the  costs  and  expenses  incurred  by  the  Indemnified  Party  in
connection  with such  defense,  compromise or settlement as and when such costs
and expenses are so incurred.

   12.3.4. Anything in this SECTION 12.3 to the contrary notwithstanding, (a) if
there is a  reasonable  probability  that Claims may  materially  and  adversely
affect the  Indemnified  Party other than as a result of money  damages or other
money payments, the Indemnified Party shall have the right, at its own cost

                                      B-21

<PAGE>
and expense,  to  participate  in the defense,  compromise  or settlement of the
Claims, (b) the Indemnifying Party shall not, without the Indemnified  Party's
written  consent,  settle or  compromise  any  Claims or consent to entry of any
judgment which does not include as an  unconditional  term thereof the giving by
the  claimant or the  plaintiff to the  Indemnified  Party of a release from all
liability in respect of such Claims in form and  substance  satisfactory  to the
Indemnified  Party, and (c) in the event that the Indemnifying  Party undertakes
defense of any Claims, the Indemnified Party, by counsel or other representative
of its own choosing  and at its sole cost and  expense,  shall have the right to
consult  with the  Indemnifying  Party and its counsel or other  representatives
concerning such Claims and the Indemnifying  Party and the Indemnified Party and
their respective counsel or other  representatives  shall cooperate with respect
to such  Claims  and (d) in the event  that the  Indemnifying  Party  undertakes
defense of any Claims,  the Indemnifying  Party shall have an obligation to keep
the  Indemnified  Party informed of the status of the defense of such Claims and
furnish the  Indemnified  Party with all documents,  instruments and information
that the Indemnified party shall reasonably request in connection therewith.

 12.4 SPECIFIC PERFORMANCE; NO CONSEQUENTIAL DAMAGES

   In addition to any other remedies which the parties hereto may have at law or
in equity,  the parties  hereto hereby  acknowledge  that the LP Interests,  the
Other LP Rights and the Newco Preferred  Stock are unique,  and that the harm to
Newco, ONS and OrionSat,  and the Exchanging Partners resulting from breaches by
the  other  parties  of  their  respective   obligations  cannot  be  adequately
compensated  by damages.  Accordingly,  the parties hereto agree that each party
shall  have  the  right  to  have  all  obligations,  undertakings,  agreements,
covenants and other provisions of this Agreement  specifically  performed by the
other  parties,  and that the parties  hereto  shall have the right to obtain an
order or decree of such specific  performance in any of the courts of the United
States or of any state or other political  subdivision thereof.  Notwithstanding
any  other  provision  of this  Agreement  to the  contrary,  in no event  shall
remedies  for  breach  of this  Agreement  include  a  party's  incidental  or
consequential damages.

13. TERMINATION

 13.1 TERMINATION

   This  Agreement  may be  terminated at any time before the Closing Date under
any one or more of the following circumstances:

   (a) by the mutual written consent of the parties hereto; or

   (b) by ONS and OrionSat or by the Exchanging Partners  collectively or (as to
a particular  Exchanging Partner), by such Exchanging Partner, by written notice
of termination to the other parties  hereto,  if the Closing has not occurred by
January 30, 1997; provided, however, that the terminating party is not in breach
of  any  obligations  or  agreements  hereunder  that  are  causing  any  of the
conditions precedent to Closing not to be satisfied.

   In addition,  following  circulation by ONS to the Exchanging Partners of the
finalized  and  implemented  Newco  Formation  Documents,  if the  finalized and
implemented  Newco  Formation  Documents are not consistent with the requirement
that Newco be substantially  identical in all material  respects to ONS, and any
discrepancies are not reasonably acceptable to such Exchanging Partner(s),  then
this Agreement may be terminated at any time on or before the Newco Finalization
Date by the Exchanging Partners  collectively or (as to a particular  Exchanging
Partner),  by such Exchanging  Partner,  by written notice of termination to the
other  parties  hereto  on  or  before  the  close  of  business  on  the  Newco
Finalization Date.

 13.2 EFFECT OF TERMINATION

   In the event this  Agreement  is  terminated  as provided in this  SECTION 13
(other than as to less than all the Exchanging  Partners),  this Agreement shall
forthwith become wholly void and of no effect, and the parties shall be released
from all future obligations hereunder;  provided,  however, that the obligations
of the Exchanging  Partners as to  confidentiality  provided in SECTION 5.6, and
the provisions of

                                      B-22

<PAGE>
SECTION 14.3 relating to the payment of expenses,  shall not be extinguished but
shall survive such termination;  provided, further, however, that no party shall
be relieved  from its  liabilities  for breach of  representations,  warranties,
obligations or agreements  prior to termination of this  Agreement.  The parties
hereto shall have any and all remedies to enforce such  obligations  provided at
law or in equity (including, without limitation, specific performance).

14. MISCELLANEOUS

 14.1 ADDITIONAL ACTIONS AND DOCUMENTS

   Each of the parties  hereto  hereby  agrees to take or cause to be taken such
further actions, to execute, deliver and file or cause to be executed, delivered
and filed such  further  documents,  and will  obtain such  consents,  as may be
necessary or as may be  reasonably  requested in order to fully  effectuate  the
purposes, terms and conditions of this Agreement.

 14.2 BROKER'S FEES OR LIABILITIES

   The fees and expenses of Salomon  Brothers shall be borne by ONS.  Except for
such fees and expenses, each party agrees to indemnify, defend and hold harmless
each of the other parties from and against any and all claims  asserted  against
such  parties for any unpaid  liability  to any broker,  finder or agent for any
brokerage fees,  finders' fees or commissions,  with respect to the transactions
contemplated by this Agreement.

 14.3 EXPENSES

   Subject to the  provisions of SECTION  14.2,  each party hereto shall pay its
own  expenses  incident  to this  Agreement  and the  transactions  contemplated
hereunder.

 14.4 ASSIGNMENT

   The  Exchanging  Partners  shall  have the right to assign  their  respective
rights  under the  Agreement,  in whole or in part,  to any of their  respective
Affiliates  or to  designate  any of  their  respective  Affiliates  to  receive
directly the Newco  Preferred  Stock to be acquired  hereunder (in each case, to
the extent permitted by applicable law). ONS,  OrionSat and Orion Atlantic shall
have the right to assign their rights under the Agreement,  in whole or in part,
to any of their  respective  Affiliates  (to the extent  permitted by applicable
law).  In no event shall the  assignment  by ONS,  OrionSat,  or any  Exchanging
Partner of its respective  rights under this Agreement,  whether before or after
the  Closing,  release  ONS,  OrionSat,  or  any  Exchanging  Partner  from  its
respective liabilities and obligations hereunder.

 14.5 ENTIRE AGREEMENT; AMENDMENT

   This  Agreement,  including  the  Schedules,  Exhibits  and  other  documents
referred to herein or furnished  pursuant hereto constitute the entire agreement
among the parties hereto with respect to the  transactions  contemplated  herein
and therein, and supersede all prior oral or written agreements,  commitments or
understandings  with respect to the matters provided for herein and therein.  No
amendment or modification of this Agreement shall be valid or binding unless set
forth in writing and duly  executed  and  delivered  by the party  against  whom
enforcement of the amendment or modification is sought.

 14.6 WAIVER

   No delay or failure on the part of any party hereto in exercising  any right,
power or privilege under this Agreement or under any other  documents  furnished
in connection  with or pursuant to this  Agreement  shall impair any such right,
power  or  privilege  or  be  construed  as a  waiver  of  any  default  or  any
acquiescence  therein. No single or partial exercise of any such right, power or
privilege shall preclude the further exercise of such right, power or privilege,
or the exercise of any other right, power or

                                      B-23

<PAGE>
privilege.  No waiver  shall be valid  against any party  hereto  unless made in
writing  and signed by the party  against  whom  enforcement  of such  waiver is
sought and then only to the extent expressly specified therein.

 14.7 CONSENT TO JURISDICTION

   This  Agreement  and  the  duties  and  obligations  of  ONS,  OrionSat,  the
Exchanging Partners hereunder and under each of the documents referred to herein
shall  be  enforceable  against  any of  ONS,  OrionSat,  or one or  more of the
Exchanging Partners,  as the case may be, in the courts of the United States and
of the States of Maryland and Delaware. For such purpose, ONS, OrionSat and each
of the  Exchanging  Partners  hereby  irrevocably  submit  to the  non-exclusive
jurisdiction  of such  courts,  and  agrees  that all  claims in respect of this
Agreement and such other  documents  may be heard and  determined in any of such
courts.

 14.8 SEVERABILITY

   If any part of any  provision  of this  Agreement  or any other  agreement or
document given pursuant to or in connection with this Agreement shall be invalid
or unenforceable in any respect, such part shall be ineffective to the extent of
such  invalidity  or  unenforceability  only,  without in any way  affecting the
remaining parts of such provision or the remaining provisions of this Agreement.

 14.9 GOVERNING LAW

   This Agreement,  the rights and  obligations of the parties  hereto,  and any
claims or disputes  relating  thereto,  shall be governed  by and  construed  in
accordance  with the laws of the State of Delaware  (excluding the choice of law
rules thereof).

 14.10 NOTICES

   All notices,  demands,  requests, or other communications which may be or are
required to be given,  served,  or sent by any party to any other party pursuant
to this  Agreement  shall be in  writing  and shall be hand  delivered,  sent by
overnight courier or mailed by first-class, registered or certified mail, return
receipt  requested,  postage  prepaid,  or transmitted by telegram,  telecopy or
telex, addressed as follows:

               (i)  If to Orion Atlantic, ONS or OrionSat:
                    2440 Research Boulevard
                    Suite 400
                    Rockville, Maryland 20817
                    Attn: Richard H. Shay, Esq.

               (ii) If to the Exchanging Partners, to each of the
                    following who is an Exchanging Partner:
                    British Aerospace Holding, Inc.
                    22070 Broderick Drive
                    Sterling, Virginia 20166
                    Attn: Charles Gaba

                    COM DEV Satellite Communications Limited
                    155 Sheldon Drive
                    Cambridge, Ontario
                    Canada N1R 7H6
                    Attn: David Belbeck

                                      B-24

<PAGE>
                    Kingston Communications International Limited
                    Telephone House
                    Carr Lane
                    Kingston-upon-Hull
                    HU1 3RE England                                   
                    Attn: John Bailey                                 

                    Lockheed Martin Commercial Launch Services, Inc.  
                    Attention: Chester Wheeler                        
                    Lockheed Martin Commercial                        
                    Launch Services, Inc.                             
                    P.O. Box 179                                      
                    MSM DC-1400                                       
                    Denver, Colorado 80201-0179                       

                    MCN Sat US, Inc.                                  
                    37, Avenue Louis Breguet B.P.1                    
                    78146 V|felizy Villacoublay Cedex                 
                    France                                            
                    Attn: Claude Goumy                                

                    Trans-Atlantic Satellite, Inc.                    
                    1211 Avenue of the Americas                       
                    41st Floor                                        
                    New York, NY 10036                                
                    Attn: Ken Mori                                    
                    
   Each  party may  designate  by notice in  writing a new  address to which any
notice,  demand,  request or communication may thereafter be so given, served or
sent.  Each  notice,  demand,  request,  or  communication  which  shall be hand
delivered, sent, mailed, telecopied or telexed in the manner described above, or
which shall be delivered to a telegraph  company,  shall be deemed  sufficiently
given,  served,  sent, received or delivered for all purposes at such time as it
is delivered to the addressee (with the return receipt, the delivery receipt, or
(with respect to a telecopy or telex) the  answerback  being deemed  conclusive,
but not  exclusive,  evidence of such  delivery)  or at such time as delivery is
refused by the addressee upon presentation.

 14.11 HEADINGS

   Section headings  contained in this Agreement are inserted for convenience of
reference  only,  shall  not be deemed  to be a part of this  Agreement  for any
purpose, and shall not in any way define or affect the meaning,  construction or
scope of any of the provisions hereof.

 14.12 EXECUTION IN COUNTERPARTS

   To  facilitate  execution,   this  Agreement  may  be  executed  in  as  many
counterparts  as may be required.  It shall not be necessary that the signatures
of, or on behalf of, each party, or that the signatures of all persons  required
to bind any party,  appear on each counterpart;  but it shall be sufficient that
the  signature  of, or on behalf of, each party,  or that the  signatures of the
persons required to bind any party,  appear on one or more of the  counterparts.
All counterparts shall collectively  constitute a single agreement. It shall not
be necessary  in making  proof of this  Agreement to produce or account for more
than a number of  counterparts  containing the  respective  signatures of, or on
behalf of, all of the parties hereto.

 14.13 LIMITATION ON BENEFITS

   The covenants,  undertakings and agreements set forth in this Agreement shall
be solely for the  benefit  of, and shall be  enforceable  only by, the  parties
hereto and their respective successors, heirs, executors,  administrators, legal
representatives and permitted assigns, except that (i) the agreements set

                                      B-25

<PAGE>
forth in SECTION 10 also shall be for the  benefit  of, and  enforceable  by, EP
Indemnified  Persons  and  their  respective   successors,   heirs,   executors,
administrators,  legal representatives or permitted assigns, and (ii) agreements
relating  to  Affiliates  of  the  Exchanging  Partners  named  or  referred  to
specifically herein also shall be for the benefit of, enforceable by and (to the
extent  permitted  by  law)  enforceable   against  such  Affiliates  and  their
respective successors, heirs, executors,  administrators,  legal representatives
or permitted assigns.

 14.14 BINDING EFFECT

   Subject to any provisions hereof restricting assignment, this Agreement shall
be binding  upon and shall inure to the benefit of the parties  hereto and their
respective successors, heirs, executors,  administrators,  legal representatives
and assigns.

                                      B-26

<PAGE>
IN WITNESS  WHEREOF,  the parties hereto have duly executed this  Agreement,  or
have caused this  Agreement to be duly executed on their  behalf,  as of the day
and year first above written.

                                        INTERNATIONAL PRIVATE
                                         SATELLITE PARTNERS, L.P.
                                        By: Orion Satellite Corporation, its 
                                            general partner

                                        By: /s/
                                            ------------------------------------


                                        ORION NETWORK SYSTEMS, INC.

                                        By: /s/
                                            ------------------------------------

                                       
                                        ORION SATELLITE CORPORATION 

                                        By: /s/
                                            ------------------------------------

                                        

                                      B-27

<PAGE>



                                        BRITISH AEROSPACE
                                         COMMUNICATIONS, INC.


                                        By: /s/
                                            ------------------------------------


                                        COM DEV SATELLITE COMMUNICATIONS LIMITED


                                        By: /s/
                                            ------------------------------------


                                        KINGSTON COMMUNICATIONS
                                         INTERNATIONAL LIMITED


                                        By: /s/
                                            ------------------------------------


                                        LOCKHEED MARTIN COMMERCIAL
                                         LAUNCH SERVICES, INC.


                                        By: /s/
                                            ------------------------------------

                                        MCN SAT US, INC.


                                        By: /s/
                                            ------------------------------------


                                        TRANS-ATLANTIC SATELLITE, INC.


                                        By: /s/
                                            ------------------------------------


                                      B-28

<PAGE>

                                                                     EXHIBIT A
                                                                   TO EXCHANGE
                                                                     AGREEMENT

                                 DEFINITIONS

   "Affiliate"  means: (a) with respect to a person, any member of such person's
family;  (b) with  respect to an entity,  any  officer,  director,  stockholder,
partner  or  investor  of or in such  entity or of or in any  Affiliate  of such
entity;  and (c) with respect to a person or entity,  any person or entity which
directly  or  indirectly,  through  one or  more  intermediaries,  Controls,  is
Controlled by, or is under common Control with such person or entity.

   "Agreement" means the Exchange Agreement, including each of the Schedules and
Exhibits hereto.

   "Agreement of Principles" means the Agreement of Principles dated as of April
2, 1992, among Orion Atlantic, OrionSat, ONS and the Exchanging Partners.

   "BAe" means British Aerospace Communications, Inc., a Delaware corporation.

   "Business Day" means any day on which  commercial  banks in New York City are
not required or authorized to close.

   "Certificate of Designations"  means the Certificate of Designations,  Rights
and  Preferences  establishing  the terms and relative rights and preferences of
the Newco  Preferred Stock in  substantially  the form set forth as Exhibit B to
this Agreement.

   "Claims" means all demands, claims, actions or causes of action, assessments,
losses,   damages  (including,   without   limitation,   diminution  in  value),
liabilities,  costs  and  expenses,  including,  without  limitation,  interest,
penalties and attorneys' fees and disbursements.

   "Closing"  means the  closing of the  exchange of  interests  pursuant to the
Agreement.

   "Closing  Date"  means such time and date as shall be as  proposed by ONS not
more than ten days after satisfaction or waiver of all the conditions  specified
in Sections 9 and 10.

   "COM  DEV"  means  COM  DEV  Satellite  Communications  Limited,  a  Canadian
corporation.

   "Consent  and  Agreement"  means the Consent and  Agreement  effective  as of
December  20,  1991,  among Orion  Atlantic,  OrionSat,  ONS and the  Exchanging
Partners.

   "Control"  means  possession,  directly or indirectly,  of power to direct or
cause the  direction of  management or policies  (whether  through  ownership of
voting securities, by agreement or otherwise).

   "Encumbrance"  means  any  mortgage,  lien,  pledge,  encumbrance,   security
interest,  deed of trust,  option,  encroachment,  reservation,  order,  decree,
judgment,  condition,  restriction,  charge,  agreement,  claim or equity of any
kind.

   "EP Indemnified Persons' means the Exchanging Partners and their respective
Affiliates, employees, representatives, agents, officers and directors.

   "Exhibit" means an exhibit attached to the Agreement.

   "Exchange Act" means the Exchange Act of 1934, as amended.

   "Kingston" means Kingston  Communications  International  Limited,  a company
organized under the laws of England.

   "Kingston Sales  Representative  Agreements"  means the Sales  Representative
Agreement  dated as of June 30,  1994,  between  Orion  Atlantic  and a Kingston
Affiliate,  Kingston  Satellite  Systems  Limited,  as  amended,  and the Ground
Operations  Agreement  dated as of June 30,  1994,  between  Orion  Atlantic and
Kingston, as amended.

                                      B-29

<PAGE>
   "Laws"  means  all  foreign,   federal,  state  and  local  statutes,   laws,
ordinances,  regulations,  rules, resolutions,  orders,  determinations,  writs,
injunctions,  awards (including,  without limitation, awards of any arbitrator),
judgments and decrees applicable to the specified persons or entities and to the
businesses and assets thereof (including,  without limitation,  Laws relating to
securities  registration  and  regulation;   the  sale,  leasing,  ownership  or
management of real property;  employment  practices,  terms and conditions,  and
wages and hours;  building standards,  land use and zoning;  safety,  health and
fire prevention; and environmental protection).

   "Limited  Partner" means ONS and the Exchanging  Partners as limited partners
of Orion Atlantic.

   "LP Interest" means a limited partnership interest in Orion Atlantic.

   "Lockheed Martin" means Lockheed Martin  Commercial Launch Services,  Inc., a
Delaware corporation.

   "Material  Adverse  Effect" means a material  adverse effect on the business,
results of operations, liabilities, properties, assets or financial condition of
ONS and its Subsidiaries,  taken as a whole, or a material adverse effect on the
transactions contemplated by this Agreement.

   "Material Contract" means any contract, instrument, commitment or arrangement
of ONS which  ONS would be  required  to file  with the SEC as an  exhibit  to a
registration statement on Form S-1 pursuant to Item 601(b)(10) of Regulation S-K
under the Securities Act.

   "MCN Sat" means MCN Sat US, Inc., a Delaware corporation.

   "MCN Sat Sales  Representative  Agreements"  means  the Sales  Representative
Agreement  dated as of June 30, 1995 between Orion Atlantic and MCN Sat Service,
S.A., as amended,  and the Ground Operations Agreement dated as of June 30, 1995
between Orion Atlantic and MCN Sat Service, S.A., as amended.

   "Newco Common Stock" means shares of common stock,  par value $.01 per share,
of Newco.

   "Newco  Preferred  Stock" means shares of Series C 6%  Cumulative  Redeemable
Convertible  Preferred  Stock of Newco,  par value  $.01 per  share,  having the
rights and preferences set forth in the Certificate of Designations.

   "ONS" means ONS Network Systems, Inc., a Delaware corporation.

   "ONS Common Stock" means shares of common stock, par value $.01 per share, of
ONS.

   "ONS Series A Preferred  Stock" means the Series A 8%  Cumulative  Redeemable
Convertible Preferred Stock of ONS.

   "ONS Series B Preferred  Stock" means the Series B 8%  Cumulative  Redeemable
Convertible Preferred Stock of ONS.

   "Orion Atlantic" means  International  Private  Satellite  Partners,  L.P., a
Delaware limited partnership.

   "Option  Agreements"  means the applicable  Option Agreement  effective as of
December 20, 1991,  among Orion  Atlantic,  OrionSat and each of the  Exchanging
Partners.

   "OrionSat" means Orion Satellite Corporation, a Delaware corporation.

   "Partnership  Agreement"  means the Second Amended and Restated  Agreement of
Limited  Partnership  of  International  Private  Satellite  Partners,  L.P., as
amended.

   "PPU Agreement" means the Preferred Participating Unit Agreements dated as of
October 7, 1993,  among  Orion  Atlantic,  OrionSat,  and each of ONS,  COM DEV,
Kingston, Lockheed Martin and MCN Sat.

   "Preferred Bidder  Agreement" means the Preferred Bidder Agreement  effective
as of December 20, 1991, among Orion Atlantic,  OrionSat, ONS and the Exchanging
Partners.

                                      B-30

<PAGE>
   "Refund Agreement" means the Refund Agreement, dated December 31, 1994, among
Orion Atlantic, OrionSat, ONS and certain of the Exchanging Partners.

   "SEC" means the U.S. Securities and Exchange Commission.

   "Section" means a Section (or a subsection) of the Agreement.

   "Securities  Act" means the Securities Act of 1933, as amended,  and all laws
promulgated pursuant thereto or in connection therewith.

   "Subscription  Agreement" means the Subscription  Agreements  effective as of
December 20, 1991, between Orion Atlantic and each of the Exchanging Partners.

   "Subsidiary" means, with respect to any Person, any corporation, partnership,
association or other business  entity of which (i) if a corporation,  a majority
of the total voting  power of shares of stock  entitled  (without  regard to the
occurrence of any contingency) to vote in the election of directors, managers or
trustees thereof is at the time owned or controlled,  directly or indirectly, by
that  Person  or one or more of the  other  Subsidiaries  of  that  Person  or a
combination  thereof,  or (ii) if a  partnership,  association or other business
entity,  a majority  of the  partnership  or other  similar  ownership  interest
thereof is at the time  owned or  controlled,  directly  or  indirectly,  by any
Person or one or more Subsidiaries of that person or a combination  thereof. For
purposes  hereof,  a Person  or  Persons  shall  be  deemed  to have a  majority
ownership  interest in a partnership,  association  or other business  entity if
such Person or Persons shall be allocated a majority of partnership, association
or other  business  entity  gains or  losses  or shall be or  control  a general
partner of such  partnership,  association  or other  business  entity.  Without
limiting  the  foregoing,  International  Private  Satellite  Partners,  L.P., a
Delaware  limited  partnership,  shall  be  deemed  to be a  Subsidiary  of  the
Corporation for so long as the  Corporation or any of its other  Subsidiaries is
the general partner thereof.

   "TA Sat" means Trans-Atlantic Satellite, Inc., a Delaware corporation.

   "Tax Adjustment  Factor" means,  with respect to (i) BAe,  $11,634;  (ii) COM
DEV, $1,940; (iii) Kingston,  $1,940; (iv) Lockheed Martin, $3,878; (v) MCN Sat,
$3,878; and (vi) TA Sat, $3,878.

                                      B-31

<PAGE>
              FIRST AMENDMENT TO SECTION 351 EXCHANGE AGREEMENT
                            AND PLAN OF CONVERSION

   THIS FIRST AMENDMENT TO SECTION 351 EXCHANGE AGREEMENT AND PLAN OF CONVERSION
(this  "Amendment")  is  entered  into  as  of  December,  1996,  by  and  among
International  Private Satellite Partners,  L.P., a Delaware limited partnership
("Orion Atlantic"); Orion Network Systems, Inc., a Delaware corporation ("ONS");
Orion Satellite Corporation,  a Delaware corporation  ("OrionSat");  and each of
the  following  entities:  British  Aerospace  Communications,  Inc., a Delaware
corporation,  COM DEV Satellite  Communications Limited, a Canadian corporation,
Kingston Communications  International Limited, a company incorporated under the
laws of England,  Lockheed Martin Commercial  Launch Services,  Inc., a Delaware
corporation,  MCN Sat US,  Inc.,  a  Delaware  corporation,  and Trans  Atlantic
Satellite,   Inc.,  a  Delaware  corporation   (collectively,   the  "Exchanging
Partners")  under the Section 351  Exchange  Agreement  and Plan of  Conversion,
dated as of June __, 1996,  between and among Orion Atlantic,  ONS, OrionSat and
the Exchanging Partners (the "Exchange Agreement").

   WHEREAS,  Orion  Atlantic,  ONS and OrionSat are currently  pursuing and will
continue to pursue certain financing  transactions that were contemplated by the
Exchange  Agreement,  and the  parties  hereto  desire  to  amend  the  Exchange
Agreement  to  extend  potentially  the  termination  date  to  provide  for the
possibility  that such  financings will not be completed by January 30, 1997 and
to refund certain payments.

   NOW,  THEREFORE,  for and in consideration of the foregoing and of the mutual
covenants and  agreements  hereinafter  set forth,  the parties  hereto agree as
follows:

                    1. CLOSING TERMINATION DATE EXTENSION

   The first  paragraph of Section  13.1(b) of the Exchange  Agreement is hereby
amended to read in its entirety as follows:

   (b) by ONS and OrionSat or by the Exchanging Partners  collectively or (as to
a particular  Exchanging Partner), by such Exchanging Partner, by written notice
of termination to the other parties  hereto,  if the Closing has not occurred by
April 30, 1997 (the "Closing  Termination Date");  provided,  however,  that the
terminating  party is not in breach of any  obligations or agreements  hereunder
that are causing any of the conditions precedent to Closing not to be satisfied.

                        2. REFUND OF CERTAIN PAYMENTS

   Section 3.2(c) of the Exchange  Agreement is hereby amended by adding, at the
end thereof, the following:

   Notwithstanding  the  foregoing  provisions  of this Section  3.2(c),  to the
extent that amounts are paid by one or more  Exchanging  Partners (or Affiliates
of such Exchanging  Partners) (i) pursuant to the Capacity  Agreements and which
are  subject  to being  refunded  under the  Refund  Agreement  ("Firm  Capacity
Payments")  during the  Adjustment  Period for  obligations  of such  Exchanging
Partners (or Affiliates) arising after January 29, 1997 and prior to the Closing
Date,  and (ii)  pursuant to the  Contingent  Capacity  Agreements  ("Contingent
Capacity  Payments")  during  the  Adjustment  Period  for  obligations  of such
Exchanging  Partners (or Affiliates)  arising after the date hereof and prior to
the Closing Date (collectively, "Payments Subject to Refund"), then if (and only
if) ONS or Newco  completes a Bond  Offering  prior to the  Closing  Termination
Date,

   (x) to the extent that the gross  proceeds from the Bond Offering  (excluding
any amounts  required to be set aside or pledged for the purpose of  pre-funding
interest  payments) for ONS or Newco,  plus the gross  proceeds from the sale of
Convertible  Subordinated  Debentures  to BAe and Matra Marconi Space UK Limited
("Matra Marconi Space") or their Affiliates,  exceeds the sum of (1) the amounts
necessary to effect the Credit Facility  Refinancing  and all other  obligations
relating  thereto  or  arising  therefrom,   including  without  limitation  all
principal and accrued  interest due with respect to the Credit  Facility and all
breakage fees and costs arising from termination of the interest

                                      B-32

<PAGE>
rate hedge relating to the Credit Facility, (2) $49.4 million,  representing the
proposed initial payments to be made by ONS or Newco under the Orion 2 Satellite
Contract and related Orion 2 Option Agreement, (3) $13 million, representing the
incentive payments that will be payable to Matra Marconi Space or its Affiliates
with  respect  to Orion 1 upon or  immediately  following  the  Credit  Facility
Refinancing, (4) $3.5 million,  representing the amounts that will be payable to
STET upon or  immediately  following  the Credit  Facility  Refinancing,  (5) an
amount reasonably determined by ONS or Newco to be necessary working capital for
ONS or  Newco to  conduct  operations  following  the Bond  Offering  and  other
transactions (not to exceed $10 million),  and (6) the costs and expenses of the
Bond Offering,  the Convertible  Subordinated  Debenture  financings and related
transactions (not to exceed $14.3 million),  the excess (the "Available  Funds")
shall be used to refund  the  amounts of the  Payments  Subject to Refund to the
respective  Exchanging  Partners  at the  Closing  (or,  if such  excess  is not
sufficient  to refund all of the  Payments  Subject to Refund to the  respective
Exchanging  Partners,  the  Available  Funds  shall  be  used  first  to  refund
Contingent  Capacity  Payments to the extent of such Available Funds, and second
to refund Firm Capacity Payments to the extent of any remaining Available Funds,
in each case  with  partial  refunds  to be made pro rata  among the  Exchanging
Partners  in  proportion  to their  respective  applicable  Payments  Subject to
Refund),  and amounts so refunded shall not be included in clause (i)(A) of this
Section 3.2(c); and

   (y) any  portions  of the  Payments  Subject to Refund not so refunded to the
respective Exchanging Partners at the Closing shall be included in clause (i)(A)
of this  Section  3.2(c) as part of the  Adjustment  Amounts of such  Exchanging
Partners.  

The refund of  Available  Funds shall be made at or within three  business  days
after the  Closing.  ONS and Newco  shall  deliver  to the  Exchanging  Partners
simultaneously  with  such  refund  a  certificate  of  their  respective  chief
financial  officers  setting  forth in  reasonable  detail all  calculations  or
computations  required or  contemplated  by this Section  3.2(c),  including the
amount and  application  of the  Available  Funds.  ONS and Newco shall  provide
promptly,  to any Exchanging Partner requesting the same, such additional detail
supporting such  calculations  and  computations  and such back-up or supporting
documentation as such Exchanging Partner may reasonably request.

                              3. TAX ADJUSTMENT

   Section 3.2(c)(ii) of the Exchange Agreement is hereby amended to read in its
entirety as follows:

   (ii) the product of the number of days in the  Adjustment  Period through and
including  (but not beyond)  January 29, 1997  multiplied by the Tax  Adjustment
Factor for such Exchanging Partner, divided by

                4. SALE OF CONVERTIBLE SUBORDINATED DEBENTURES

   Notwithstanding  the  provisions  of Section  5.8 of the  Exchange  Agreement
contemplating  that Newco will, as of the Closing  Date,  complete a Convertible
Subordinated  Debenture Offering of approximately $125 million,  it is presently
intended that the Convertible  Subordinated  Debenture  Offering consist only of
purchases of $50 million of Convertible  Subordinated  Debentures by BAe and $10
million of  Convertible  Subordinated  Debentures  by Matra  Marconi  Space,  or
Affiliates thereof. Accordingly, all references in the Exchange Agreement to the
Convertible  Subordinated Debenture Offering shall refer only to the $60 million
of Convertible  Subordinated Debentures to be purchased by BAe and Matra Marconi
Space,  or Affiliates  thereof.  While not intended to be legally  binding,  BAe
hereby  reconfirms  that it or its Affiliates  intend to purchase from Newco $50
million of Convertible Subordinated Debentures on terms being negotiated between
BAe and  ONS,  and MCN Sat  hereby  confirms  that  Matra  Marconi  Space or its
Affiliates   intends  to  purchase   from  Newco  $10  million  of   Convertible
Subordinated  Debentures  on terms  substantially  the same as those  ultimately
agreed upon by BAe and ONS for the BAe investment.  Section 10.8 of the Exchange
Agreement is hereby amended to read in its entirety as follows:Newco  shall have
raised at least $60 million from the sale of Convertible Subordi-

                                      B-33

<PAGE>
nated Debentures,  including the sale of $50 million of Convertible Subordinated
Debentures to BAe or its  Affiliates  and the sale of $10 million of Convertible
Subordinated Debentures to Matra Marconi Space or its Affiliates.

         5. ELIMINATION OF KINGSTON INVESTMENT IN PPU INTEREST SHARES

   Section  3.2(d) of the Exchange  Agreement  is hereby  amended to delete such
Section in its entirety; Section 3.2(a)(iii) of the Exchange Agreement is hereby
amended to delete the  language  "other than  interest  paid to  Kingston  under
Section 3.2(d)" in its entirety;  Section  3.2(b)(iii) of the Exchange Agreement
is hereby amended to delete the language "and PPU Interest Shares  calculated as
set forth in Section  3.2(d)" in its  entirety;  the last  paragraph  of Section
3.2(b) of the  Exchange  Agreement  is hereby  amended to replace  the  language
"Section  3.2(b),  in Sections  3.2(c) and 3.2(d)"  with the  language  "Section
3.2(b) and in Section  3.2(c);  and Section 3.2(c) of the Exchange  Agreement is
hereby  amended to delete the language  "other than Kingston (or an Affiliate of
Kingston)" in its entirety.

                        6. ORION 2 SATELLITE CONTRACT

   Section  9.7 of the  Exchange  Agreement  shall  be  amended  to  read in its
entirety as follows:

   The Option  Agreement,  dated  December 10, 1996,  between Orion Atlantic and
Matra  Marconi Space  ("Orion 2 Option  Agreement"),  shall be in full force and
effect;  Orion Atlantic shall not be in default  thereunder;  and Orion Atlantic
shall have made all payments required to be made thereunder  through the earlier
of the Closing Date and March 31, 1997.  Restated  Amendment #10, dated December
10, 1996,  to the Second  Amended and Restated  Purchase  Contract,  dated as of
September 26, 1991,  between Orion Atlantic and Matra Marconi Space, as amended,
shall be in full force and effect,  and Orion  Atlantic  shall not be in default
thereunder.

                               7. MISCELLANEOUS

   7(a) Defined Terms

   Capitalized  terms used in this  Amendment and not otherwise  defined in this
Amendment shall have the meanings provided for in the Exchange Agreement.

   7(b)Governing Law

   This Amendment,  the rights and  obligations of the parties  hereto,  and any
claims or disputes  relating  thereto,  shall be governed  by and  construed  in
accordance with the same laws as govern the Exchange Agreement.

   7(c)Counterparts

   To  facilitate  execution,   this  Amendment  may  be  executed  in  as  many
counterparts  as may be  required;  and it  shall  not  be  necessary  that  the
signatures  of, or on behalf  of,  each  party,  or that the  signatures  of all
persons required to bind any party, appear on each counterpart;  but it shall be
sufficient  that the  signature  of, or on behalf of,  each  party,  or that the
signatures of the persons  required to bind any party,  appear on one or more of
the  counterparts.  All  counterparts  shall  collectively  constitute  a single
agreement.  It shall not be  necessary  in  making  proof of this  Amendment  to
produce  or  account  for more  than a number  of  counterparts  containing  the
respective signatures of, or on behalf of, all of the parties hereto.

   7(d) Facsimile Execution

   To facilitate  execution,  this Amendment may be executed  through the use of
facsimile  transmission,  and a counterpart  of this Amendment that contains the
facsimile  signature  of a party,  which  counterpart  has been  transmitted  by
facsimile  transmission  to each of the other parties  hereto at such  facsimile
numbers as such other  parties  shall  request,  shall  constitute  an  executed
counterpart of this Amendment.

                                      B-34

<PAGE>
   7(e) Ratification

   The Exchange Agreement,  as amended and modified by this First Amendment,  is
in all respects  ratified and confirmed and the terms,  covenants and agreements
thereof shall be and remain in full force and effect. The parties executing this
First  Amendment agree that the Exchange  Agreement,  as amended and modified by
this First  Amendment,  shall be remain  valid and  binding  upon such  parties,
notwithstanding  the failure of one or more Exchanging  Partners to execute this
First Amendment and  notwithstanding  any such non-executing  Exchanging Partner
seeking to terminate the Exchange Agreement as to such non-executing  Exchanging
Partner under Section  13.1(b) of the Exchange  Agreement after January 30, 1997
and before April 30, 1997.

   7(f) Effectiveness of the Amendment

   This First Amendment to Section 351 Exchange Agreement and Plan of Conversion
is being made pursuant to Section 14.5 of the Exchange  Agreement which provides
that an amendment to the Exchange  Agreement shall be valid and binding when set
forth in writing and duly  executed  and  delivered  by the party  against  whom
enforcement  of the  amendment  is  sought.  The  parties  executing  this First
Amendment  agree that this First  Amendment shall be valid and binding upon such
parties,  notwithstanding  the  failure of one or more  Exchanging  Partners  to
execute this First Amendment.

   IN WITNESS  WHEREOF,  the undersigned  have duly executed this Amendment,  or
have caused this  Amendment to be duly executed on their  behalf,  as of the day
and year first hereinabove set  forth.INTERNATIONAL  PRIVATE SATELLITE PARTNERS,
L.P.

                                        INTERNATIONAL PRIVATE
                                         SATELLITE PARTNERS, L.P.
                                        By: Orion Satellite Corporation, its 
                                             general partner

                                        By:  /s/
                                             -----------------------------------

                                        
                                        ORION NETWORK SYSTEMS, INC.

                                        By:  /s/
                                             -----------------------------------

                                        
                                        

                                        ORION SATELLITE CORPORATION

                                        By:  /s/
                                             -----------------------------------

                                        

                                      B-35

<PAGE>
                                        BRITISH AEROSPACE
                                         COMMUNICATIONS, INC.

                                        By:  /s/
                                             -----------------------------------

                                        

                                        COM DEV SATELLITE COMMUNICATIONS
                                         LIMITED

                                        By:  /s/
                                             -----------------------------------

                                        
                                        

                                        KINGSTON COMMUNICATIONS
                                         INTERNATIONAL LIMITED

                                        By:  /s/
                                             -----------------------------------

                                        
                                        

                                        LOCKHEED MARTIN COMMERCIAL  LAUNCH 
                                         SERVICES, INC.

                                        By:  /s/
                                             -----------------------------------

                                        
                                        

                                        MCN SAT US, INC.

                                        By:  /s/
                                             -----------------------------------

                                        
                                        

                                        TRANS-ATLANTIC SATELLITE, INC.

                                        By:  /s/
                                             -----------------------------------


                                      B-36

<PAGE>
                                                                  ATTACHMENT C

                                    FORM OF
                         CERTIFICATE OF DESIGNATIONS,
                            RIGHTS AND PREFERENCES
                                      OF
                      SERIES C 6% CUMULATIVE REDEEMABLE
                         CONVERTIBLE PREFERRED STOCK
                                      OF
                          ORION NEWCO SERVICES, INC.
                           PURSUANT TO SECTION 151
                        OF THE GENERAL CORPORATION LAW
                           OF THE STATE OF DELAWARE

   The undersigned DOES HEREBY CERTIFY that, pursuant to the authority contained
in Article FOURTH of the Certificate of  Incorporation  of Orion Newco Services,
Inc., a Delaware corporation (the "Corporation"), and in accordance with Section
151 of the  General  Corporation  Law of the  State of  Delaware,  the  Board of
Directors  of the  Corporation  has  authorized  the  creation  of a  series  of
Preferred Stock of the Corporation having the designation Series C 6% Cumulative
Redeemable  Convertible  Preferred  Stock and  having  the  powers,  rights  and
preferences,  and the qualifications,  limitations and restrictions  thereof, as
are set forth in Exhibit A hereto and made a part hereof and that the  following
resolution was duly adopted by the Board of Directors of the Corporation:

RESOLVED,  that a series of  authorized  Preferred  Stock,  par value  $0.01 per
share, of the Corporation be, and it hereby is, created; that the shares of such
series  shall be, and they hereby  are,  designated  as "Series C 6%  Cumulative
Redeemable  Convertible Preferred Stock;" that the number of shares constituting
such  series  shall be, and it hereby  is,  fixed at  _______,000;  and that the
powers,   rights  and  preferences  and  the  qualifications,   limitations  and
restrictions thereof, of the shares of such series are as set forth in Exhibit A
attached hereto and made a part hereof.

   IN WITNESS  WHEREOF,  the  Corporation  has caused its  corporate  seal to be
hereunto  affixed and this  Certificate  to be signed by its President and Chief
Executive  Officer and attested to by its Vice  President,  Corporate  and Legal
Affairs, and Secretary this day of , 1997.

                                        ORION NEWCO SERVICES, INC.


                                        By:
                                             -----------------------------------
[SEAL]                                  Name: W. Neil Bauer
                                        Title: President/Chief Executive
                                                Officer

ATTEST:


- -------------------------------------
Name: Richard H. Shay, Esq.
Title: Vice President, Corporate and
Legal Affairs/Secretary


<PAGE>
                      SERIES C 6% CUMULATIVE REDEEMABLE
                         CONVERTIBLE PREFERRED STOCK

   The following sections set forth the powers, rights and preferences,  and the
qualifications,  limitations  and  restrictions  thereof,  of the  Corporation's
Series C 6% Cumulative Redeemable Convertible Preferred Stock. Capitalized terms
used herein are defined in Section 10 below.

   Section 1. Dividends.

   1A.  General  Obligation.  Subject  to the  preferential  rights  of Series A
Preferred  Stock or Series B Preferred  Stock  ranking  senior to the  Preferred
Stock,  the record  holders of  Preferred  Stock  shall be  entitled  to receive
dividends, when, as and if declared by the Corporation's board of directors (the
"Board")  and to the  extent  permitted  under the  General  Corporation  Law of
Delaware,  as amended,  as provided in this Section 1, subject to paragraph  1F.
Dividends  shall accrue on a daily basis  commencing  on the Date of Issuance of
each  Preferred  Share  at the  simple  interest  rate  of 6% per  annum  of the
Liquidation  Value  thereof,  and shall be payable as provided in paragraph  1B.
Dividends  shall cease  accruing  upon the  earliest to occur of (i) the date on
which the  Liquidation  Value of such Preferred  Share is paid, (ii) the date on
which such Preferred  Share is converted into shares of Common Stock  hereunder,
or (iii) the Maturity Date. Such dividends shall accrue whether or not they have
been  declared and whether or not there are net profits,  surplus or other funds
of the Corporation legally available for the payment of dividends.

   1B.  Payment of  Dividends.  Subject to the  provisions  of  paragraph 1A and
paragraph 1F,  dividends shall be payable,  in arrears,  following each Dividend
Reference Date within twenty days after such Dividend Reference Date. The amount
of the dividend on each share of Preferred Stock payable following each Dividend
Reference  Date  shall  equal the  aggregate  amount of all  accrued  and unpaid
dividends on such share of Preferred  Stock from the Prior Dividend Date (or, in
the case of the first  dividend  paid with  respect to such  share,  the Date of
Issuance of such Preferred  Share) through such Dividend  Reference Date. To the
extent any  dividend is not paid within  twenty days after a Dividend  Reference
Date,  all dividends  which have accrued and remain  unpaid on each  outstanding
Preferred  Share through such Dividend  Reference Date shall be accumulated  and
shall remain  accumulated  dividends with respect to such Preferred  Share until
the date paid. No interest,  dividend or sum of money in lieu of interest, shall
be payable in respect of any  dividend  payment or payments  that may be accrued
and unpaid.

   1C.  Distribution  of Partial  Dividend  Payments.  Except in connection with
redemptions or repurchases  pursuant to paragraph 3A or 3B below, if at any time
the  Corporation  pays less than the total amount of dividends then accrued with
respect to the Preferred  Stock such payment shall be distributed  ratably among
the holders thereof based upon the aggregate accrued but unpaid dividends on the
Preferred  Shares  held by each such  holder and such  payment  shall be applied
first to dividends which have accrued on such Preferred Shares during the period
since the  latest  preceding  Dividend  Reference  Date and second to reduce any
previously accumulated dividends with respect to such Preferred Shares.

   1D.  Payment of Dividends in Common Stock.  Except as  specifically  provided
herein,  the  Corporation  shall pay all dividends with respect to the Preferred
Stock (including,  in the case of a redemption,  any amount equal to accrued and
unpaid dividends  constituting a portion of the Redemption  Price) in fully paid
and non-assessable  shares of Common Stock. The number of shares of Common Stock
distributable  in a dividend on each share of Preferred  Stock shall be equal to
the quotient obtained by dividing (a) the amount of such dividend, as determined
under  paragraph  1B, by (b) the  higher of (i) the  Market  Price of the Common
Stock on the Dividend Reference Date immediately  preceding the dividend payment
and (ii) the Series A/B Dilution Price.  When the Corporation pays a dividend to
the holders of Preferred  Stock,  the  Corporation  shall provide each holder of
Preferred  Stock with a calculation of the aggregate  number of shares of Common
Stock payable in such dividend,  including the  computation of the Market Price.
If any  fractional  interest in a share of Common  Stock  would,  except for the
provisions  of this  sentence,  be  deliverable  upon payment of any dividend in
shares of Common Stock,  the  Corporation,  in lieu of delivering the fractional
share  therefor,  shall pay an amount to the holder  thereof equal to the Market
Price  of such  fractional  interest,  calculated  as set  forth  above  in this
paragraph 1D.

                                       C-2

<PAGE>



   1E. Dividends on Junior Securities. The Corporation shall not declare and pay
any dividends on Junior  Securities  unless all accrued and unpaid  dividends on
the Preferred Stock have been paid in full.

   1F. Certain  Withholding  Provisions.  Notwithstanding any other provision of
Section  1, and  without  limiting  the  generality  of the  Board's  power  and
authority with respect to the  declaration  and payment of dividends,  the Board
shall have and may exercise the power and  authority to provide that the receipt
by each record holder of Preferred  Shares entitled thereto of any dividend paid
by the  Corporation as declared on the issued and outstanding  Preferred  Shares
shall be  subject  to the  condition  (the  "Tax  Payment  Condition")  that the
Corporation  receive,  at or prior to the time for payment of such dividend (the
"Payment Time"), from or on behalf of such record holder, payment in full of the
taxes, fees, duties, assessments, or other amounts, if any (the "Tax"), that the
Corporation  is required  under  applicable law to pay or withhold in connection
with the declaration and payment to such record holder of such dividend.  If the
Tax Payment Condition applies and has been satisfied, or has been duly waived by
the  Corporation,  at or prior to the  Payment  Time,  at the  Payment  Time the
Corporation  shall pay such dividend to such record  holder.  If the Tax Payment
Condition  applies but has not been  satisfied,  and has not been duly waived by
the  Corporation,  at or prior to the  Payment  Time,  at the  Payment  Time the
Corporation  shall pay the  dividend to which such record  holder is entitled by
irrevocably depositing and setting aside such dividend with the Secretary of the
Corporation  as escrow holder (the "Escrow  Holder").  Upon the Escrow  Holder's
receipt, from or on behalf of such record holder, of payment in full of the Tax,
plus any interest,  penalty,  or  additional  amount to be paid or withheld as a
result of the  passage  of time from and after  the  Payment  Time (the  "Escrow
Termination Time"), the Escrow Holder shall release such dividend to such record
holder and shall  release  such Tax, and such  additional  amount if any, to the
Corporation.  If such  dividend  is paid in shares  of  Common  Stock and is not
received  at or prior to the  Payment  Time by the  record  holder of  Preferred
Shares entitled to payment thereof,  then  (notwithstanding any provision hereof
to the contrary)  until the Escrow  Termination  Time (and only until such time,
whether or not the dividend has been released by the Escrow Holder), such record
holder  shall  not be  entitled  to vote such  shares  of  Common  Stock for any
purpose,  to receive payment of dividends or other  distributions on such shares
of Common  Stock,  or to exercise any other rights or  privileges  in respect of
such shares of Common  Stock,  and the Escrow Holder shall have no right to vote
such shares of Common  Stock or to  exercise  any other  right or  privilege  in
respect  thereof  (whether in  accordance  with the wishes or directions of such
record  holder or  otherwise),  but the Escrow  Holder shall receive and hold in
escrow until the Escrow  Termination  Time  together  with such shares of Common
Stock any dividends  paid or other  distributions  made on such shares of Common
Stock and at the Escrow  Termination  Time shall release such  dividends paid or
other distributions made on such shares of Common Stock, if any, along with such
shares of Common Stock.

   Section 2. Liquidation.

   Subject to the  provisions  of Section 2 of each of the Series A  Certificate
and the Series B  Certificate:  upon any  Liquidation,  each holder of Preferred
Stock shall be entitled to be paid,  before any  distribution or payment is made
upon any Junior  Securities,  an amount in cash equal to the  greater of (a) the
aggregate  Liquidation  Value  (plus an amount  equal to all  accrued and unpaid
dividends)  of all  shares of  Preferred  Stock  held by such  holder or (b) the
amount  which would be  distributed  with  respect to the shares of Common Stock
(including  fractional  shares for purposes of this calculation) into which such
shares  of  Preferred  Stock  are  convertible   (assuming   conversion  of  all
outstanding  Preferred  Stock)  immediately  prior to the  record  date for such
distribution (or, if there is no such record date, then the date as of which the
holders of Common Stock entitled to such  distribution are determined),  and the
holders of Preferred Stock shall not be entitled to any further payment;  and if
upon any such Liquidation the  Corporation's  assets to be distributed among the
holders  of the  Preferred  Stock are  insufficient  to permit  payment  to such
holders of the  aggregate  amount which they are  entitled to be paid,  then the
entire assets to be distributed shall be distributed  ratably among such holders
based  upon the  aggregate  Liquidation  Value  (plus  all  accrued  and  unpaid
dividends)  of the  Preferred  Shares  held by each such  holder.  Prior to such
Liquidation,  the Corporation shall (to the extent permitted by law) declare for
payment all accrued and unpaid  dividends  with respect to the Preferred  Stock,
which  dividends  shall be payable in cash  notwithstanding  the  provisions  of
paragraph  1D.  (Payment of the greater of the amounts  specified in clauses (a)
and (b) of this Section 2 in respect of such Preferred Shares shall constitute

                                       C-3

<PAGE>
payment of such declared  dividends.) The Corporation  shall mail written notice
of such  Liquidation,  not less than 60 days prior to the  payment  date  stated
therein, to each record holder of Preferred Stock.

   Section 3. Redemptions.

   3A.  Redemption at the Maturity  Date.  At the Maturity Date the  Corporation
shall redeem all of the Preferred  Shares then  outstanding for a price equal to
the Redemption  Price.  The Corporation  shall pay the Redemption  Price for the
Preferred  Shares within thirty (30) days after the Maturity Date (or such later
date upon which the certificates evidencing the Preferred Shares are surrendered
to the Corporation).

   3B.  Redemption  at the  Option  of the  Corporation.  At any time  after the
Initial   Redemption  Date,  or,  if  prior  to  the  Initial  Redemption  Date,
immediately  prior to the consummation of any  consolidation,  merger or sale in
which the successor  entity or purchasing  entity is other than the Corporation,
to the extent that it has funds legally sufficient therefor, the Corporation may
redeem all or, subject to the last sentence of this paragraph,  a portion of the
Preferred  Shares  then  outstanding  for the  Redemption  Price.  The number of
Preferred Shares to be redeemed from each holder thereof in a partial redemption
pursuant to this paragraph 3B shall be the number of Preferred Shares determined
by  multiplying  the  total  number of  Preferred  Shares  to be  redeemed  by a
fraction,  the  numerator  of  which  shall  be the  total  Redemption  Price of
Preferred  Shares then held by such holder and the denominator of which shall be
the aggregate Redemption Price of Preferred Shares then outstanding.

   3C. Redemption Payment. For each Preferred Share which is to be redeemed, the
Corporation shall be obligated to pay the Redemption Price to the holder thereof
on the  Redemption  Date or such later date upon which  occurs the  surrender by
such  holder  at  the   Corporation's   principal   office  of  the  certificate
representing such Preferred Share.  Subject to the provisions of paragraph 4C of
the Series A Certificate  and paragraph 4C of the Series B  Certificate,  if the
funds of the  Corporation  legally  available for payment of the cash portion of
the Redemption Price of Preferred Shares on any Redemption Date are insufficient
to pay the  cash  portion  of the  Redemption  Price  for the  total  number  of
Preferred  Shares to be  redeemed  on such date,  those  funds which are legally
available shall be used to redeem the maximum  possible number of such Preferred
Shares  ratably among the holders of the Preferred  Shares to be redeemed  based
upon the aggregate  Redemption  Price of the Preferred  Shares held by each such
holder and the  remaining  Preferred  Shares called for  redemption  will remain
outstanding; and at any time thereafter when additional funds of the Corporation
are legally available for the redemption of Preferred  Shares,  such funds shall
immediately  be used to redeem the  balance of the  Preferred  Shares  which the
Corporation  has become  obligated to redeem on any Redemption Date but which it
has not redeemed.  Payment of the Redemption  Price in respect of such Preferred
Shares shall  extinguish  all rights to dividends that are accrued and unpaid as
of the Redemption  Date with respect to the Preferred  Shares which are redeemed
on such Redemption Date.

   3D. Notice of Redemption.  The Corporation  shall mail written notice of each
redemption of any Preferred  Stock to each record holder of Preferred  Stock not
more than 60 nor less than 30 days prior to the date on which such redemption is
to be made specifying (a) the number of shares of Preferred Stock to be redeemed
by the Corporation and (b) the Redemption  Date. Upon mailing any such notice of
redemption, the Corporation shall become obligated to redeem the total number of
Preferred  Shares  specified in such notice at the time of redemption  specified
therein  and upon the  surrender  on or  before  such  time of the  certificates
representing  such Preferred  Shares. If one or more holders of Preferred Shares
being  redeemed  shall fail to  surrender  the  certificates  representing  such
Preferred  Shares  by  the  Redemption  Date,  the  Corporation  shall  pay  the
Redemption Price by irrevocably  depositing or setting aside the required amount
to be paid promptly  upon  surrender of such  certificates.  Such deposit or set
aside shall be deemed payment of the Redemption  Price to the holder for whom it
is  deposited  or set aside.  In case fewer than the total  number of  Preferred
Shares   represented  by  any  certificate  are  redeemed,   a  new  certificate
representing  the number of unredeemed  Preferred  Shares shall be issued to the
holder  thereof  without cost to such holder  within three  Business  Days after
surrender of the certificate representing the redeemed Preferred Shares.

                                       C-4

<PAGE>
   3E.  Dividends after  Redemption Date. No Preferred Share that is redeemed is
entitled to any dividends  accruing after the Redemption Date. On the Redemption
Date of any Preferred  Share,  all rights of the holder of such Preferred  Share
shall  cease,  and  such  Preferred  Share  shall  be  deemed  to be  no  longer
outstanding.

   3F. Redeemed or Otherwise  Acquired  Preferred  Shares.  Any Preferred Shares
which are redeemed, converted or otherwise acquired by the Corporation thereupon
shall be retired.  All such shares shall upon their retirement become authorized
but  unissued  shares  of  preferred  stock  of the  Corporation  and may not be
reissued  as  Preferred  Stock but may be  reissued  as part of a new  series of
preferred  stock to be  created by  resolution  or  resolutions  of the board of
directors,  subject to the conditions or  restrictions  on issuance set forth in
the certificate of incorporation of the Corporation.

   Section 4. Voting Rights.

   The  holders  of the  Preferred  Stock  shall be  entitled  to  notice of all
stockholders meetings in accordance with the Corporation's bylaws, and except as
otherwise  required by law, the holders of the Preferred Stock shall be entitled
to vote on all matters  submitted to the  stockholders  for a vote together with
the holders of the Common  Stock  voting  together  as a single  class with each
share of Common Stock entitled to one vote per share,  and each Preferred  Share
(including  fractional  shares)  entitled  to one vote for each  whole  share of
Common Stock that would be issuable upon  conversion of such Preferred  Share at
the time the vote is taken.

   Section 5. Conversion.

   5A. Conversion Procedure.

   (i) At any time and from time to time after the issuance thereof,  any holder
of Preferred Stock may convert all or any of the Preferred Shares (including any
fraction  of a  Preferred  Share) held by such holder into a number of shares of
Common  Stock  equal to the sum of:  (a) the  number of  shares of Common  Stock
computed by  multiplying  the number of Preferred  Shares to be converted by the
Liquidation  Value  of a  Preferred  Share,  and  dividing  the  result  by  the
Conversion  Price then in effect,  plus (b) the number of shares of Common Stock
that would be payable if all accrued but unpaid dividends were declared and paid
on the Preferred Shares to be converted.  For purposes of determining the amount
of dividends payable or that would be payable with respect to a conversion under
Section 5, the date for  determining  the Market Price shall be the Business Day
immediately  preceding  the date on which  conversion  is  deemed  to have  been
effected.

   (ii) Each conversion of Preferred Stock shall be deemed to have been effected
as of the close of business on the date on which the certificate or certificates
representing  the Preferred  Shares to be converted have been surrendered at the
principal  office  of the  Corporation,  together  with  written  notice  of the
holder's  desire  to  convert  such  Preferred  Shares.  At  such  time  as such
conversion has been effected,  the rights of the holder of such Preferred Shares
as such holder shall cease, and the Person or Persons in whose name or names any
certificate  or  certificates  for shares of Common  Stock are to be issued upon
such  conversion  shall be deemed to have become the holder or holders of record
of the shares of Common Stock represented  thereby,  which Common Stock shall be
deemed to have been  issued as of such  time.  Issuance  of Common  Stock by the
Corporation  to effect any conversion  shall  extinguish all rights to dividends
that are  accrued  and unpaid as of the date on which  conversion  is to be made
with respect to the Preferred Shares which are to be converted on such date.

   (iii) The  conversion  rights of any  Preferred  Share  subject to redemption
hereunder shall terminate on the Redemption Date for such Preferred Share unless
the  Corporation  has failed to pay to the holder thereof the  Redemption  Price
thereof.

   (iv)  Notwithstanding  any other  provision  hereof,  if a conversion  of any
Preferred  Shares is to be made in connection with a Public Offering or prior to
a  redemption,  such  conversion  may,  at the  election  of the  holder of such
Preferred Shares, be conditioned upon the consummation of the Public Offering or
the redemption occurring on or before a specified date, in which case

                                       C-5

<PAGE>
such conversion  shall not be deemed to be effective  until the  consummation of
the Public  Offering or unless the redemption  occurs on or before the specified
date.

   (v) As soon as possible  after a  conversion  has been  effected  (but in any
event within three  Business Days in the case of  subparagraph  (a) below),  the
Corporation shall deliver to the converting holder:

   (a) a certificate or certificates representing the number of shares of Common
Stock  issuable  by  reason  of such  conversion  in such name or names and such
denomination or denominations as the converting holder has specified;

   (b)  payment of the  amount  payable  under  subparagraph  (viii)  below with
respect to such conversion; and

   (c) a certificate representing any Preferred Shares which were represented by
the certificate or certificates  delivered to the Corporation in connection with
such conversion but which were not converted.

   (vi) The issuance of certificates  for shares of Common Stock upon conversion
of Preferred Stock shall be made without charge to the holders of such Preferred
Stock for any  issuance  tax in respect  thereof or other cost  incurred  by the
Corporation  in  connection  with such  conversion  and the related  issuance of
shares of Common Stock.

   (vii) The  Corporation  shall not close its books  against  the  transfer  of
Preferred  Stock or of  Common  Stock  issued or  issuable  upon  conversion  of
Preferred  Stock in any manner which  interferes  with the timely  conversion of
Preferred Stock. The Corporation shall assist and cooperate (but the Corporation
shall not be required to expend substantial efforts or funds) with any holder of
Preferred  Shares  required  to make any  governmental  filings  or  obtain  any
governmental approval prior to or in connection with any conversion of Preferred
Shares hereunder (including,  without limitation, making any filings required to
be made by the Corporation).

   (viii) If any  fractional  interest in a share of Common Stock would,  except
for the provisions of this  subparagraph,  be deliverable upon any conversion of
shares of a holder's Preferred Stock, the Corporation, in lieu of delivering the
fractional  share  therefor,  shall pay an amount to the holder thereof equal to
the Market Price of such fractional  interest as of the Business Day immediately
preceding the date of conversion.

   (ix) The Corporation shall at all times reserve and keep available out of its
authorized  but  unissued  shares of Common  Stock,  solely  for the  purpose of
issuance upon the conversion of the Preferred Stock, not less than the number of
shares of Common Stock issuable upon the conversion of all outstanding Preferred
Stock  which may then be  exercised.  All  shares of Common  Stock  which are so
issuable  shall,  when  issued,  be duly  and  validly  issued,  fully  paid and
nonassessable and free from all taxes, liens and charges.  The Corporation shall
take all such  actions as may be  necessary  to ensure  that all such  shares of
Common  Stock  may be so  issued  without  violation  of any  applicable  law or
governmental  regulation or any requirements of any domestic securities exchange
upon which shares of Common Stock may be listed  (except for official  notice of
issuance which shall be immediately  delivered by the Corporation upon each such
issuance).

   5B.  Subdivision or Combination  of Common Stock.  If the  Corporation at any
time  subdivides  (by any  stock  split,  stock  dividend,  recapitalization  or
otherwise) the outstanding  shares of one or more classes of Common Stock into a
greater number of shares, the Conversion Price (and the Trigger Price and Series
A/B Dilution Price) in effect  immediately  prior to such  subdivision  shall be
proportionately reduced, and if the Corporation at any time combines (by reverse
stock  split or  otherwise)  the  outstanding  shares of one or more  classes of
Common  Stock into a smaller  number of shares,  the  Conversion  Price (and the
Trigger Price and Series A/B Dilution Price) in effect immediately prior to such
combination shall be proportionately increased.

                                       C-6

<PAGE>
   5C.  Reorganization,  Reclassification,  Consolidation,  Merger  or Sale.  In
connection  with any  Reorganization,  (i) the holders of Preferred  Stock shall
thereafter  have the right to acquire and receive,  in lieu of or in addition to
(as  the  case  may be) the  shares  of  Common  Stock  immediately  theretofore
acquirable and receivable upon the conversion of such holder's  Preferred Stock,
such shares of stock,  securities,  cash or other assets (or, if not practicably
attainable,  the  reasonable  equivalent  thereof)  as such  holder  would  have
received in connection with such Reorganization if such holder had converted its
Preferred Stock immediately prior to such Reorganization, and (ii) dividends and
amounts in  respect of  dividends  hereunder  payable in shares of Common  Stock
prior to such  Reorganization  shall be payable, in lieu of each share of Common
Stock, in such shares of stock, securities,  cash or other assets (or reasonable
equivalent  thereof)  as the  holder of one share of Common  Stock  received  in
connection  with such  Reorganization.  The Corporation  shall make  appropriate
provisions  to  ensure  that  the  requirements  of the  previous  sentence  are
effected.  In each such  case,  the  Corporation  shall  also  make  appropriate
provisions to ensure that the  provisions of this Section 5 and Sections 6 and 7
shall thereafter be applicable to the Preferred Stock.

   5D. Notices.

   (i) Immediately upon any adjustment of the Conversion  Price, the Corporation
shall give written  notice  thereof to all holders of Preferred  Stock,  setting
forth in reasonable detail and certifying the calculation of such adjustment.

   (ii) The  Corporation  shall give written  notice to all holders of Preferred
Stock at least 20 days  prior to the date on which the  Corporation  closes  its
books or fixes a record date (a) with  respect to any  dividend or  distribution
upon  Common  Stock,  (b) with  respect  to any pro rata  subscription  offer to
holders of Common  Stock or (c) for  determining  rights to vote with respect to
any Liquidation or Reorganization.

   5E. Mandatory  Conversion.  The Corporation may require, by written notice to
all  holders  of  Preferred  Stock,  the  conversion  of all of the  outstanding
Preferred Stock into a number of shares of Common Stock equal to the sum of: (a)
the  number of shares of Common  Stock  computed  by  multiplying  the number of
Preferred Shares to be converted by the Liquidation  Value of a Preferred Share,
and dividing the result by the applicable  Conversion Price then in effect, plus
(b) the number of shares of Common  Stock  that would be payable if all  accrued
but  unpaid  dividends  were  declared  and paid on the  Preferred  Shares to be
converted;  provided  that the  Closing  Price  of the  Common  Stock  (adjusted
proportionately  for stock dividends,  stock splits,  combinations,  and similar
changes in the Common Stock occurring after the Closing) on at least twenty (20)
of the thirty (30) latest trading days  preceding the date of the  Corporation's
notice  has  been  greater  than  or  equal  to  the  Conversion  Price.  If the
Corporation  shall  require the  conversion  of the  Preferred  Stock under this
Section 5E within two years from the Initial Date of  Issuance,  then the number
of shares of Common Stock into which the shares of Preferred Stock are converted
shall be increased by the number of shares of Common Stock that would be payable
if the Corporation were immediately to declare and pay all dividends that in the
absence of conversion  would have accrued on such shares of Preferred Stock over
the six-month  period  immediately  following the date of conversion;  provided,
however,  that the total  dividends and amounts in respect of dividends  paid on
the Preferred Stock after the Date of Issuance thereof, including any additional
amounts in respect of dividends paid as a result of a required  conversion under
this Section 5E, shall not be less than the amount of dividends  that would have
accrued  on all  outstanding  shares  of the  Preferred  Stock for one full year
following the Initial Date of Issuance.

   Any conversion of shares of Preferred  Stock under this Paragraph 5E shall be
effected and be deemed to have been  effected as of the close of business on the
date on which the Corporation  provides written notice of such conversion to the
holders of such shares of Preferred Stock (the "Mandatory Conversion Time"), and
as of the Mandatory  Conversion Time, the rights of the holders of the converted
shares of Preferred  Stock, as such,  shall cease and terminate,  such converted
shares of Preferred  Stock shall be retired in accordance with paragraph 3F, the
shares of Common Stock into which such shares of Preferred  Stock are  converted
shall be  issued  and  deemed  to have  been  issued,  the  certificate(s)  that
theretofore represented shares of Preferred Stock thereafter shall represent the
number of shares  of Common  Stock  into  which the  shares of  Preferred  Stock
theretofore represented thereby shall

                                       C-7

<PAGE>
have been converted, and the holder of any such certificate,  upon the surrender
thereof to the Corporation,  shall be entitled to receive from the Corporation a
new certificate representing the number of shares of Common Stock into which the
shares of  Preferred  Stock  theretofore  represented  thereby  shall  have been
converted.

   5F. Effect on Conversion Price of Certain Events.

   (i) General.  In order to prevent  dilution of the conversion  rights granted
under this Section 5, the Conversion  Price shall be subject to adjustment  from
time to time pursuant to this paragraph 5F.

   (ii) Adjustment of Conversion  Price. If and whenever on or after the Date of
Issuance the  Corporation  issues or sells, or in accordance with this paragraph
5F is deemed to have  issued or sold,  other than in an Excluded  Issuance,  any
share of Common Stock for a consideration  per share less than the Trigger Price
in effect  immediately prior to such time (a "Dilutive  Event"),  then forthwith
upon such issue or sale in the  Dilutive  Event the  Conversion  Price  shall be
reduced by multiplying  the Conversion  Price in effect  immediately  before the
Dilutive Event by a fraction,  the numerator of which is the number of shares of
Common Stock that are  Outstanding on an  As-Converted  Basis (as defined below)
immediately  before the Dilutive Event plus the number of shares of Common Stock
that could be purchased at the Trigger  Price at the time of the Dilutive  Event
for the  aggregate  consideration  paid or payable  upon the sale or issuance of
Common Stock in the Dilutive  Event,  and the denominator of which is the number
of  shares  of  Common  Stock  that are  Outstanding  on an  As-Converted  Basis
immediately  before  the  Dilutive  Event  plus the  number of  shares  that are
acquired or to be acquired  upon the sale or issuance of the Common Stock in the
Dilutive  Event.  For  purposes of this  paragraph  5F(ii),  "Outstanding  on an
As-Converted  Basis"  immediately before the Dilutive Event means the sum of (i)
all Common Stock issued and  outstanding  immediately  before the Dilutive Event
plus (ii) all Common Stock  issuable  upon the exercise of Options or conversion
of  Convertible  Securities  outstanding  immediately  before the Dilutive Event
(other than Preferred Stock).

   (iii) Issuance of Rights or Options.  If the Corporation in any manner grants
any  Options  and the  price per  share  for  which  shares of Common  Stock are
issuable  upon the exercise of any such Option is less than the Trigger Price in
effect  immediately prior to the time of the granting of such Option,  then such
shares of Common  Stock  shall be  deemed  to have been  issued  and sold by the
Corporation at the time of the granting of such Options for such price per share
and the Conversion  Price shall be adjusted in accordance with paragraph  5F(ii)
above. For purposes of this paragraph, the "price per share" for which shares of
Common Stock are issuable  upon the exercise of any Option shall be equal to the
sum of the  amounts of  consideration  (if any)  received or  receivable  by the
Corporation with respect to such shares of Common Stock upon the granting of the
Option and upon exercise of the Option. No further  adjustment of the Conversion
Price shall be made upon the actual issue of such Common Stock upon the exercise
of such Options.

   (iv) Issuance of  Convertible  Securities.  If the  Corporation in any manner
issues or sells any Convertible Security (or Options to purchase any Convertible
Security)  and the price per share for shares of Common  Stock that are issuable
upon  conversion  or exchange  thereof is less than the Trigger  Price in effect
immediately  prior to the time of such  issue or sale (or the  granting  of such
Option),  then such  shares of Common  Stock shall be deemed to have been issued
and  sold  by the  Corporation  at the  time  of the  issuance  or  sale of such
Convertible Securities (or the granting of such Option) for such price per share
and the Conversion  Price shall be adjusted in accordance with paragraph  5F(ii)
above.  For the  purposes  of this  paragraph,  the  "price per share" for which
shares  of  Common  Stock  are  issuable  upon  conversion  or  exchange  of any
Convertible  Security (or exercise of any Option therefor) shall be equal to the
sum of the  amounts of  consideration  (if any)  received or  receivable  by the
Corporation  upon the issuance of the Convertible  Security (or such Option) and
upon the  conversion  or exchange of such  Convertible  Security (or exercise of
such Option). No further adjustment of the Conversion

                                       C-8

<PAGE>
Price shall be made upon the actual issue of such Common  Stock upon  conversion
or exchange of any Convertible  Security,  and if any such issue or sale of such
Convertible  Security is made upon exercise of any Options for which adjustments
of the Conversion  Price had been or are to be made pursuant to other provisions
of this Section 5, no further  adjustment of the Conversion  Price shall be made
by reason of such issue or sale.

   (v) Change in Option Price or Conversion Rate. If the purchase price provided
for in any Option, the additional consideration (if any) payable upon the issue,
conversion  or exchange of any  Convertible  Security,  or the rate at which any
Convertible Security is convertible into or exchangeable for Common Stock change
at any time,  any  Conversion  Price  previously  adjusted  with respect to such
Option or Convertible Security and in effect at the time of such change shall be
readjusted to the Conversion  Price which would have been in effect at such time
had such Option or  Convertible  Security  originally  provided for such changed
purchase price, additional consideration or changed conversion rate, as the case
may be, at the time initially granted, issued or sold.

   (vi) Treatment of Expired  Options and  Unexercised  Convertible  Securities.
Upon the expiration of any Option or the  termination of any right to convert or
exchange  any  Convertible  Security  without the exercise of any such Option or
right,  any Conversion  Price then in effect  hereunder shall be adjusted to the
Conversion  Price which would have been in effect at the time of such expiration
or  termination  had  such  Option  or  Convertible   Security,  to  the  extent
outstanding  immediately  prior to such  expiration or  termination,  never been
issued.

   (vii) Calculation of Consideration  Received.  If any Common Stock, Option or
Convertible Security is issued or sold or deemed to have been issued or sold for
cash,  the  consideration  received  therefor  shall be deemed to be the  amount
received  by the  Corporation  therefor.  In case any Common  Stock,  Options or
Convertible  Securities are issued or sold for a consideration  other than cash,
the amount of the  consideration  other than cash  received  by the  Corporation
shall be the fair value of such  consideration,  except where such consideration
consists of securities,  in which case the amount of  consideration  received by
the Corporation shall be the Market Price thereof as of the date of receipt.  If
any Common Stock, Option or Convertible  Security is issued to the owners of the
non-surviving  entity in connection  with any merger in which the Corporation is
the surviving corporation,  the amount of consideration therefor shall be deemed
to be the  fair  value  of  such  portion  of the  assets  and  business  of the
non-surviving  entity  as is  attributable  to such  Common  Stock,  Options  or
Convertible Securities,  as the case may be. The fair value of any consideration
other than cash and securities shall be as determined in good faith by the Board
of Directors of the Corporation.

   (viii)  Integrated  Transactions.  In case any Option is issued in connection
with  the  issue  or sale  of  other  securities  of the  Corporation,  together
comprising one  integrated  transaction  in which no specific  consideration  is
allocated to such Option by the parties  thereto,  the Option shall be deemed to
have been issued for a consideration of $.01.

   (ix) Treasury Shares. For purposes of calculating under this paragraph 5F the
number of shares of Common Stock  outstanding  at any given time,  the number of
shares of Common Stock outstanding at such time does not include shares owned or
held by or for the account of the Corporation or any subsidiary thereof, and the
disposition  of any shares so owned or held shall be considered an issue or sale
of Common Stock.

   (x) De Minimis  Adjustments.  Notwithstanding  any other  provisions  of this
Section 5, the  Corporation  shall not be required to make any adjustment of the
Conversion Price unless such adjustment would require an increase or decrease of
at least one percent (1%) in the Conversion Price as then in effect.  Any lesser
adjustment shall be carried forward and shall be made no later than the time of,
and together  with,  the next  subsequent  adjustment  which,  together with any
adjustment or  adjustments  so carried  forward,  shall amount to an increase or
decrease of at least one percent (1%) of the Conversion Price as then in effect.
If any action would require  adjustment of the Conversion Price pursuant to more
than one subparagraph of this

                                       C-9

<PAGE>
paragraph 5F, only one  adjustment  shall be made as determined in good faith by
the Board of Directors of the Corporation.

   Section 6. Liquidating Dividends.

   If the  Corporation  declares or pays a Liquidating  Dividend upon the Common
Stock,  then the Corporation  shall pay to the holders of Preferred Stock at the
time of payment thereof the  Liquidating  Dividend which would have been paid to
such holders had such Preferred  Stock been converted  immediately  prior to the
record date fixed for determining the  stockholders  entitled to receive payment
of such  Liquidating  Dividend,  or, if no record date is fixed,  the date as of
which the record  holders of Common Stock  entitled to such  dividends are to be
determined.

   Section 7. Purchase Rights.

   If at any time the  Corporation  grants,  issues or sells any Purchase Rights
pro rata to the record holders of any class of Common Stock, then each holder of
Preferred Stock shall be entitled to acquire,  upon the terms applicable to such
Purchase  Rights,  the  aggregate  Purchase  Rights which such holder would have
acquired if such holder had held the number of shares of Common Stock acquirable
upon conversion of such holder's Preferred Shares immediately before the date on
which a record is taken for the grant, issuance or sale of such Purchase Rights,
or, if no such  record is taken,  the date as of which  the  record  holders  of
Common Stock are to be determined for the grant,  issue or sale of such Purchase
Rights.

   Section 8. Registration of Transfer.

   The  Corporation  shall  keep at its  principal  office  a  register  for the
registration of issuances and transfers of Preferred  Stock.  Upon the surrender
of any certificate  representing  Preferred Stock at such place, the Corporation
shall,  at the  request of the record  holder of such  certificate,  execute and
deliver (at the  Corporation's  expense) a new  certificate or  certificates  in
exchange  therefor  representing in the aggregate the number of Preferred Shares
represented by the surrendered  certificate.  Each such new certificate shall be
registered in such name and shall  represent such number of Preferred  Shares as
is  requested  by the  holder  of  the  surrendered  certificate  and  shall  be
substantially  identical in form to the surrendered  certificate,  and dividends
shall accrue on the Preferred Stock represented by such new certificate from the
date to which dividends have been fully paid on such Preferred Stock represented
by the surrendered certificate.

   Section 9. Replacement.

   Upon  receipt of evidence  reasonably  satisfactory  to the  Corporation  (an
affidavit of the registered  holder shall be  satisfactory) of the ownership and
the  loss,  theft,  destruction  or  mutilation  of any  certificate  evidencing
Preferred Shares,  and in the case of any such loss, theft or destruction,  upon
receipt of indemnity reasonably  satisfactory to the Corporation  (provided that
if the holder is a financial  institution or other institutional  investor,  its
own agreement  shall be  satisfactory),  or, in the case of any such  mutilation
upon  surrender  of such  certificate,  the  Corporation  shall (at its expense)
execute and deliver in lieu of such  certificate a new  certificate of like kind
representing  the number of Preferred Shares  represented by such lost,  stolen,
destroyed  or  mutilated  certificate  and dated the date of such lost,  stolen,
destroyed or mutilated certificate,  and dividends shall accrue on the Preferred
Stock  represented by such new certificate from the date to which dividends have
been fully  paid on the  Preferred  Shares  represented  by such  lost,  stolen,
destroyed or mutilated certificate.

   Section 10. Definitions.

   "Bond Offering" means an underwritten  offering of notes or debentures of the
Corporation to the public, with or without Options, primarily for the purpose of
refinancing the indebtedness of International  Private Satellite Partners,  L.P.
("Orion Atlantic") outstanding under the Credit Agreement dated December 6, 1991
among Orion  Atlantic,  the Banks named  therein  and The Chase  Manhattan  Bank
(National Association), as Agent.

   "Business  Day" means a day on which banks are generally open for business in
New York City.

   "Closing" means ______ ___, 1997.

                                      C-10

<PAGE>
   "Closing  Price" of each share of Common  Stock or other  security  means the
composite  closing price of the sales of the Common Stock or such other security
on all securities exchanges on which such security may at the time be listed (as
reported in The Wall Street Journal),  or, if there has been no sale on any such
exchange on any day,  the average of the highest bid and lowest  asked prices of
the Common Stock or such other security on all such exchanges at the end of such
day, or, if such security is not so listed, the closing price (or last price, if
applicable)  of sales of the Common  Stock or such other  security in the Nasdaq
National Market (as reported in The Wall Street Journal) on such day, or if such
security   is  not  quoted  in  the  Nasdaq   National   Market  but  is  traded
over-the-counter, the average of the highest bid and lowest asked prices on such
day in the over-the-counter  market as reported by the National Quotation Bureau
Incorporated, or any similar successor organization.

   "Common Stock" means, collectively, the Corporation's common stock, par value
$0.01 per share, and any capital stock of any class of the Corporation hereafter
authorized  which is not limited to a fixed sum or  percentage  of par or stated
value in  respect  to the  rights  of the  holders  thereof  to  participate  in
dividends  or in  the  distribution  of  assets  upon  any  Liquidation  of  the
Corporation;  and if there is a change such that the  securities  issuable  upon
conversion  of the  Preferred  Stock  are  issued by an  entity  other  than the
Corporation  or there is a change in the class of securities  so issuable,  then
the term  "Common  Stock"  shall mean one share of the  security  issuable  upon
conversion  of the Preferred  Stock if such  security is issuable in shares,  or
shall mean the smallest unit in which such security is issuable if such security
is not issuable in shares.

   "Conversion  Price" shall mean,  with  respect to any Series C Share,  $17.50
(subject to adjustment as provided in Section 5 for events  occurring  after its
Date of Issuance).

   "Convertible   Securities"  means  any  stock  or  other  securities  of  the
Corporation convertible into or exchangeable for Common Stock.

   "Convertible   Subordinated   Debenture   Offering"   means  an  offering  of
convertible  subordinated  debentures of the  Corporation  to the public,  which
debentures would be convertible into Common Stock.

   "Corporation" means Orion Newco Services, Inc., a Delaware corporation.

   "Date of Issuance,"  with respect to any Preferred  Share,  means the date on
which the Corporation  initially issues such Preferred Share,  regardless of the
number of times  transfer of such  Preferred  Share is made on the stock records
maintained  by  or  for  the   Corporation  and  regardless  of  the  number  of
certificates which may be issued to evidence such Preferred Share.

   "Dividend  Reference  Date"  mean  [___________]  of  each  year,  commencing
__________,  1997,  and  each of the  following:  (i)  the  date  on  which  the
Liquidation  Value of such Preferred  Share is paid, (ii) the date on which such
Preferred  Share is converted into shares of Common Stock  hereunder,  and (iii)
the Maturity Date.

   "Excluded  Issuance" means the issue or sale of (i) shares of Common Stock in
respect  of  any  transaction  described  in  paragraph  5B  (including  without
limitation any stock split, stock dividend or recapitalization),  (ii) shares of
Common  Stock  by the  Corporation  pursuant  to the  exercise  of  Options  and
Convertible Securities outstanding  immediately prior to the Closing at exercise
prices  that are  greater  than or equal to the  respective  exercise  prices in
effect as of Closing (as adjusted  pursuant to the terms of such  securities  to
give effect to stock  dividends  or stock splits or a  combination  of shares in
connection   with   a   recapitalization,   merger,   consolidation   or   other
reorganization occurring after the Closing), (iii) up to an aggregate of 150,000
shares of Common  Stock by the  Corporation  for any  purpose,  (iv)  Options to
acquire Common Stock by the Corporation  pursuant to a resolution of, or a stock
option  plan  approved  by a  resolution  of,  the  Board  of  Directors  of the
Corporation  (or  the  compensation  committee  thereof)  to  the  Corporation's
employees  or  directors,  (v) shares of Common  Stock,  Options or  Convertible
Securities  (or shares of Common  Stock  pursuant to the exercise of Options and
Convertible  Securities)  as part of or in connection  with a Bond Offering or a
Convertible Subordinated Debenture Offering.

   "Initial  Date of Issuance"  means the Date of Issuance of the first share of
Preferred Stock to be issued.

                                      C-11

<PAGE>
   "Initial  Redemption  Date" means the earlier of (i) the close of business on
______,  1999.  [two years from the Date of Issuance] or (ii) the effective date
of a Reorganization.

   "Junior  Securities"  means Common Stock and any other capital stock or other
equity  securities  issued by the  Corporation,  whether  currently  existing or
hereafter  authorized  or issued  (other  than  Series A  Preferred  or Series B
Preferred  or any other  series of  preferred  stock of the  Corporation  issued
pursuant to an option  granted to purchasers of Series A Preferred in connection
with the initial issuances of Series A Preferred by the Corporation).

   "Liquidation"  means  the  liquidation,  dissolution  or  winding  up of  the
Corporation;  provided, however, that neither the consolidation or merger of the
Corporation into or with any other entity or entities,  nor the sale or transfer
by the  Corporation  of all or any part of its assets,  nor the reduction of the
capital  stock  of  the  Corporation,  shall  be  deemed  to  be a  liquidation,
dissolution or winding up of the Corporation.

   "Liquidating  Dividend"  means a  dividend  upon  the  Common  Stock  payable
otherwise than in cash out of legally  available funds (determined in accordance
with generally accepted accounting principles,  consistently applied) except for
a stock dividend payable in shares of Common Stock.

   "Liquidation Value" of any Preferred Share shall be equal to $1,000.

   "Market  Price" of each share of Common Stock or other security  means,  with
respect to a specified  date, the Closing Price of such share or other security,
averaged over a period of the 20  consecutive  Business Days prior to such date.
If during this period such  security is not listed on any  securities  exchange,
quoted in the Nasdaq National Market, or quoted in the over-the-counter  market,
the  Market  Price  will be the fair  value of such  shares of  Common  Stock or
security  determined by agreement  between the  Corporation and the holders of a
majority of the  outstanding  Preferred  Shares.  If such  parties are unable to
reach  agreement  within a  reasonable  period of time,  the fair  value of such
security shall be determined by an independent  appraiser experienced in valuing
such type of  consideration  jointly selected by the Corporation and the holders
of a majority of the outstanding  Preferred  Shares.  The  determination of such
appraiser shall be final and binding upon the parties, and the fees and expenses
of such appraiser shall be borne by the Corporation.

   "Maturity  Date" means the close of business  on ______ __,  2022.  [25 years
from the Date of Issuance]

   "Options"  means any  options,  warrants  or rights  to  subscribe  for or to
purchase Common Stock or any Convertible Securities.

   "Person" means an individual, a partnership, a corporation, an association, a
joint stock company, a limited liability  company, a trust, a joint venture,  an
unincorporated organization and a governmental entity or any department,  agency
or political subdivision thereof.

   "Preferred Share" means a share of Series C Preferred.

   "Preferred Stock" means the Series C Preferred.

   "Prior Dividend Date" means,  with respect to a Dividend  Reference Date, the
previous  Dividend  Reference Date following which dividends were paid on shares
of  Preferred  Stock  hereunder  (or,  if  there  is no such  previous  Dividend
Reference Date, the Date of Issuance).

   "Public  Offering"  means  any  offering  by the  Corporation  of its  equity
securities to the public pursuant to an effective  registration  statement under
the Securities Act of 1933, as then in effect, or any comparable statement under
any similar  federal  statute then in force;  provided,  that "Public  Offering"
shall not include an offering made in connection with a business  acquisition or
combination or an employee benefit plan.

   "Purchase  Rights"  means any Options,  Convertible  Securities  or rights to
purchase stock, warrants, securities or other property.

   "Redemption Date" means the date on which the Redemption Price of a Preferred
Share is paid to the holder thereof.

                                      C-12

<PAGE>

   "Redemption  Price"  means the  Liquidation  Value of such  Preferred  Share,
payable  in cash,  plus an amount  equal to all  accrued  and  unpaid  dividends
thereon, payable in shares of Common Stock pursuant to paragraph 1D.

   "Reorganization"     means     any     recapitalization,      reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Corporation's assets to another Person or other transaction which is effected in
such a manner  that  holders of Common  Stock are  entitled  to receive  (either
directly  or upon  subsequent  liquidation)  stock,  securities  or assets  with
respect to or in exchange for Common Stock.

   "Series A  Certificate"  means the  Certificate of  Designations,  Rights and
Preferences for the Series A Preferred.

   "Series B  Certificate"  means the  Certificate of  Designations,  Rights and
Preferences for the Series B Preferred.

   "Series  A  Preferred"  means  the  Corporation's   Series  A  8%  Cumulative
Redeemable Convertible Preferred Stock, par value $.01 per share.

   "Series  B  Preferred"  means  the  Corporation's   Series  B  8%  Cumulative
Redeemable Convertible Preferred Stock, par value $.01 per share.

   "Series  C  Preferred"  means  the  Corporation's   Series  C  6%  Cumulative
Redeemable Convertible Preferred Stock, par value $.01 per share.

   "Series A/B Dilution Price" means, at any time, the conversion  price for the
Series B Preferred as then in effect under the Series B Certificate.

   "Series A Share" means a share of Series A Preferred.

   "Series B Share" means a share of Series B Preferred.

   "Series C Share" means a share of Series C Preferred.

   "Trigger  Price"  shall  mean,  with  respect to any  Series C Share,  $14.00
(subject to adjustment as provided in Section 5B for events  occurring after its
Date of Issuance).

   Section 11. Amendment and Waiver.

   No  amendment,  modification  or waiver  shall be binding or  effective  with
respect to any provision  hereof without the prior  affirmative  vote or written
consent of the holders of a majority of the Preferred Shares  outstanding at the
time such action is taken; provided, however, that without the prior affirmative
vote or written consent of each holder individually  holding at least 51% of the
Preferred  Stock then  outstanding,  no such action shall change (i) the rate at
which or the manner in which dividends on the Preferred Stock accrue or the form
of  consideration in which such dividends are payable or the times at which such
dividends  become  payable or the amount  payable on redemption of the Preferred
Stock or the times at which redemption of Preferred Stock is to occur,  (ii) any
Conversion  Price of the  Preferred  Stock or the  number  of shares or class of
stock into which the  Preferred  Stock is  convertible,  (iii) the  priority  of
payment of dividends to the Preferred Stock, (iv) the Liquidation Value, (v) the
voting rights of the  Preferred  Stock,  (vi) the rights of the Preferred  Stock
upon a  reorganization,  (vii) the  provisions  for mandatory  conversion of the
Preferred Stock,  (viii) the rights of holders of the Preferred Stock to acquire
Purchase Rights,  or (ix) the percentage  required to approve any change in this
Section 11.

   Section 12. Notices.

   Except as otherwise  expressly  provided  hereunder,  all notices referred to
herein  shall be in writing and shall be delivered  by  registered  or certified
mail,  return receipt requested and postage prepaid,  or by reputable  overnight
courier service, charges prepaid, and shall be deemed to have been given when so
mailed or sent (i) to the Corporation,  at its principal  executive  offices and
(ii) to any  stockholder,  at such  holder's  address as it appears in the stock
records of the Corporation (unless otherwise indicated by any such holder).

                                      C-13

<PAGE>
                                                                  ATTACHMENT D

                               SALOMON BROTHERS

December 10, 1996

Orion Network Systems, Inc.
2440 Research Boulevard
Suite 400
Rockville, MD 20850

Dear Sirs:

   You have requested our opinion,  as investment  bankers,  as to the fairness,
from a financial point of view, to Orion Network Systems, Inc. ("Orion"), of the
consideration  to be paid by Orion in  connection  with the Exchange (as defined
below). Pursuant to a Section 351 Exchange Agreement and Plan of Conversion (the
"Exchange Agreement") with Orion Satellite  Corporation,  a Delaware corporation
that is a wholly owned  subsidiary  of Orion  ("OrionSat")  and the sole general
partner of International  Private Satellite  Partners,  L.P., a Delaware limited
partnership  ("Orion  Atlantic"),  and each of the existing  limited partners of
Orion Atlantic other than Orion (the "Exchanging  Partners"),  Orion has agreed,
among other things, to have Orion Newco Services,  Inc., a newly formed Delaware
corporation  with a certificate  of  incorporation,  bylaws,  capital  structure
(before the issuance of the Newco  Preferred Stock defined below) and management
substantially  identical  in all  material  respects  to those of Orion  ("Orion
Newco"),  issue  121,988  shares  of  Orion  Newco's  Series  C 6%  Cumulative
Redeemable Convertible Preferred Stock (the "Newco Preferred Stock") in exchange
for the Exchanging  Partners' limited partnership  interests in Orion Atlantic
and other rights relating thereto (the "Exchange").  The Exchange is intended to
qualify as tax-free  under Section 351 of the Internal  Revenue Code of 1986, as
amended.  As a result of the Exchange,  Orion Newco will become the owner of all
the  partnership  interests in Orion Atlantic  (through Orion Newco and Orion as
limited partners and OrionSat as the sole general partner of Orion Atlantic). In
addition,  Orion  Newco  will  acquire  certain  rights  currently  held  by the
Exchanging  Partners,  including rights to receive repayment of various advances
(aggregating  approximately  $37.6  million at September 30, 1996) made to Orion
Atlantic.  The 121,988 shares of Newco  Preferred Stock expected to be issued in
the Exchange will be convertible into  approximately  6.9971 million (assuming a
closing  of the  Exchange  as of January  30,  1997;  the number of shares  will
increase if the closing  occurs  after that date)  shares of common  stock,  par
value $.01 per share, of Orion Newco ("Orion Newco Common Stock").

   We understand that concurrently with, and as a condition to, the consummation
of  the  Exchange,  (i)  Orion  Newco  intends  to  consummate  financings  (the
"Financings") consisting of (a) notes and warrants with expected net proceeds of
approximately  $250  million to refinance  the  indebtedness  of Orion  Atlantic
outstanding  under the existing  Credit  Agreement  dated December 6, 1991 among
Orion  Atlantic,  the banks named  therein and Chase  Manhattan  Bank  (National
Association), as agent (the "Orion 1 Credit Facility"), and to release Orion's
and the Exchanging Limited Partners'  (including their respective  affiliates)
existing commitments and guarantees supporting the Orion 1 Credit Facility,  (b)
the  issuance  and  sale  of  approximately   $50  million  of  Orion  Newco's
convertible subordinated debentures to British Aerospace Public Limited Company,
an affiliate of one of the Exchanging Partners and (c) the execution by Orion or
one of its affiliates of an amendment to the satellite procurement contract with
Matra  Marconi Space U.K.  Limited for the Orion 2 satellite,  which was entered
into in July 1996 and is expected to include an agreement by the manufacturer to
commence  construction of the Orion 2 satellite based upon a $40 million initial
payment,  and (ii) a wholly-owned  subsidiary of Orion Newco will be merged with
and into Orion in a tax-free  reorganization  (the  "Merger").  We have not been
asked to express an opinion,  and we do not express any opinion,  with regard to
the Financings or the Merger.


                                       D-1

<PAGE>
In arriving at our opinion, we have reviewed certain publicly available business
and  financial   information  relating  to  Orion,  as  well  as  certain  other
information,  including financial projections,  provided to us by Orion. We have
discussed the past and current operations and financial  condition and prospects
of Orion and Orion Atlantic with members of the respective  senior management of
such  entities.  We have  also  considered  such  other  information,  financial
studies,  analyses,  investigations and financial,  economic, market and trading
criteria which we deemed relevant.

   We  have  assumed  and  relied  on  the  accuracy  and  completeness  of  the
information  reviewed  by us for the  purpose  of this  opinion  and we have not
assumed any responsibility  for independent  verification of such information or
for any  independent  evaluation  or  appraisal  of the assets of Orion or Orion
Atlantic.   With  respect  to  Orion's   and  Orion   Atlantic's   financial
projections,  we have assumed that they have been  reasonably  prepared on bases
reflecting the best currently available estimates and judgments of Orion's and
Orion  Atlantic's  management,  as the case may be, as to the future financial
performance of such entity, and while we express no opinion with respect to such
forecasts  or the  assumptions  on  which  they are  based,  we have  relied  on
management's  assumption that the Financings will occur  concurrently with the
Exchange.

   Our opinion is necessarily  based upon business,  market,  economic and other
conditions as they exist on, and can be evaluated as of, the date of this letter
and does not  address  Orion's  underlying  business  decision  to effect  the
Exchange or constitute a  recommendation  to any holder of Orion common stock as
to how such holder should vote with respect to the Merger or the  Exchange.  Our
opinion  as  expressed  below  does not imply any  conclusion  as to the  likely
trading range for the Orion Newco Common Stock following the consummation of the
Exchange,  which may vary depending on, among other factors, changes in interest
rates, dividend rates, market conditions,  general economic conditions and other
factors that generally influence the price of securities.

   We have  acted as  financial  advisor to the Board of  Directors  of Orion in
connection  with the Exchange and will receive a fee for our  services,  part of
which was paid upon execution by Orion of the engagement  agreement with respect
to the  Exchange,  part of which is payable upon the initial  submission of this
opinion  and  the  remainder  of  which  is  payable  upon  consummation  of the
Financings.  In the  ordinary  course of our  business,  we  actively  trade the
securities  of Orion for our own account and for the accounts of customers  and,
accordingly, may at any time hold a long or short position in such securities.

   Based upon and  subject to the  foregoing,  it is our  opinion as  investment
bankers  that,  as of the  date  hereof,  the  consideration  to be  paid in the
Exchange is fair, from a financial point of view, to Orion.

Very truly yours,

SALOMON BROTHERS INC

                                      D-2

<PAGE>
                                   PART II

            INFORMATION NOT REQUIRED IN PROXY STATEMENT/PROSPECTUS

ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS

   The Company's  Certificate of Incorporation  provides that its directors will
not be liable for monetary  damages for breach of the directors'  fiduciary duty
of care to the Company and its  stockholders.  This provision in the Certificate
of  Incorporation  does  not  eliminate  the duty of  care,  and in  appropriate
circumstances  equitable  remedies  such as an  injunction  or  other  forms  of
non-monetary  relief would remain  available  under  Delaware law. In accordance
with  the  requirements  of  Delaware  law,  as  amended,   the  Certificate  of
Incorporation  provide that the  Company's  directors  would  remain  subject to
liability  for  monetary  damages (i) for any breach of their duty of loyalty to
the  corporation  or its  shareholders,  (ii) for acts or omissions  not in good
faith or involving  intentional  misconduct or knowing  violation of law,  (iii)
under Section 174 of the Delaware  Code for approval of an unlawful  dividend or
an unlawful stock purchase or redemption and (iv) for any transaction from which
the director derived an improper personal benefit.  This provision also does not
affect a director's  responsibilities  under any other laws, such as the federal
securities laws or state or federal environmental laws.

   The Company's  Certificate of  Incorporation  also provides  that,  except as
expressly  prohibited by law, the Company shall  indemnify any person who was or
is a party (or  threatened  to be made a party) to any  threatened,  pending  or
completed  action,  suit or proceeding by reason of the fact that such person is
or was a director or officer of the Company (or is or was serving at the request
of the  Company  as a  director  or  officer  of  another  enterprise),  against
expenses,  liabilities and losses (including attorney's fees), judgments,  fines
and amounts paid or to be paid in settlement actually and reasonably incurred by
such person in  connection  with such action,  suit or proceeding if such person
acted in good faith and a manner such person reasonably believed to be in or not
opposed to the best interests of the Company,  and, with respect to any criminal
action or proceeding,  had no reasonable cause to believe his or her conduct was
unlawful.  Such indemnification shall not be made in respect of any claim, issue
or matter as to which such person  shall have been  adjudged to be liable to the
Company  unless (and only to the extent that) the Delaware  Court of Chancery or
the court in which such action or suit was brought  determines  that, in view of
all circumstances of the case, such person is fairly and reasonably  entitled to
indemnity.

   Section  145 of the  General  Corporation  Law of the State of  Delaware,  as
amended, empowers a corporation incorporated under that statute to indemnify its
directors,  officers,  employees and agents and its former directors,  officers,
employees  and  agents  and  those  who serve in such  capacities  with  another
enterprise at its request  against  expenses,  as well as  judgments,  fines and
settlements in nonderivative lawsuits,  actually and reasonably incurred by them
in connection  with the defense of any action,  suit or proceeding in which they
or any of them were or are made parties or are  threatened to be made parties by
reason  of their  serving  or  having  served  in such  capacity.  The  power to
indemnify shall only exist where such officer,  director,  employee or agent has
acted in good faith and in a manner such person reasonably  believed to be in or
not  opposed to the best  interests  of the  corporation  and,  in the case of a
criminal  action,  where such  person  had no  reasonable  cause to believe  his
conduct was  unlawful.  However,  in an action or suit by or in the right of the
corporation, unless a court shall determine to the contrary, where such a person
has been adjudged liable to the corporation, the corporation shall have no power
of  indemnification.  Indemnity  is  mandatory  to the extent a claim,  issue or
matter has been successfully  defended.  Indemnification is not deemed exclusive
of any other  rights  to which  those  indemnified  may be  entitled,  under any
by-law,  agreement,  vote of stockholders or otherwise.  A Delaware  corporation
also has the power to purchase and  maintain  insurance on behalf of the persons
it has the power to indemnify,  whether or not indemnity  against such liability
would be allowed under the statute.

   Insofar as indemnification  for liabilities  arising under the Securities Act
of 1933,  as amended (the  "Securities  Act"),  may be  permitted to  directors,
officers  and  controlling  persons of the  Company  pursuant  to the  foregoing
provision or otherwise, the Company has been advised that, in the opinion of the

                                      II-1

<PAGE>
Securities  and Exchange  Commission,  such  indemnification  is against  public
policy as expressed in the  Securities Act and therefore  unenforceable.  In the
event that a claim for  indemnification  against such liabilities is asserted by
such person in connection  with the offering of the  Securities  (other than for
the  payment by the  corporation  of  expenses  incurred  or paid by a director,
officer or controlling  person of the  corporation in the successful  defense of
any action,  suit or proceeding),  the either  corporation  will,  unless in the
opinion of its counsel  the matter has been  settled by  controlling  precedent,
submit to a court of  appropriate  jurisdiction  the  question  of whether  such
indemnification  by it is against  public policy as expressed in the  Securities
Act and will be governed by the final adjudication of the issue.

   The Company has insurance  policies which will insure  directors and officers
against  damages from actions and claims  incurred in the course of their duties
and will insure the corporations against expenses incurred in defending lawsuits
arising from certain alleged acts of the directors and officers.

ITEM 21. EXHIBITS

<TABLE>
<CAPTION>
<S>           <C>
 Exhibit
Number        Description
2.1           Agreement  and Plan of Merger dated  January 8, 1997, by and among
              Orion Network Systems, Inc., Orion Newco Services,  Inc. and Orion
              Merger  Co,  Inc.   (Included   as   Attachment  A  to  the  Proxy
              Statement/Prospectus   which  is  a  part  of  this   Registration
              Statement.).
3.1           Form of  Restated  Certificate  of  Incorporation  of Orion  Newco
              Services, Inc.
3.2           Bylaws of Orion Newco Services, Inc.
3.3           Certificate  of  Incorporation  of  Orion  Network  Systems,  Inc.
              (Incorporated  by reference to exhibit number 3.1 in  Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
3.4           Bylaws of Orion Network Systems,  Inc.  (Incorporated by reference
              to  exhibit  number  3.2 in Registration Statement No. 33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
4.1           Forms of Warrant  issued by Orion.  (Incorporated  by reference to
              exhibit number 4.1 in Registration  Statement No. 33-80518 on Form
              S-1 of Orion Network Systems, Inc.)
4.2           Forms of Warrant  issued by Orion to holders of  Preferred  Stock.
              (Incorporated  by reference to exhibit number 4.2 in  Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
4.3           Forms of  Certificates  of  Designation  of Series A 8% Cumulative
              Redeemable  Convertible  Preferred  Stock,  Series B 8% Cumulative
              Redeemable  Convertible Preferred Stock and Series C 6% Cumulative
              Redeemable Convertible Preferred Stock.
4.4           Forms of Series A Preferred  Stock,  Series B Preferred  Stock and
              Series C Preferred Stock Certificates of Orion.
4.5           Form of Common Stock Certificate of Orion.
4.6           Form of Warrant issued to DACOM Corp.
4.7           Debenture Purchase Agreement,  dated January 13, 1997, among Orion
              Network  Systems,  Inc.,  Orion Newco Services,  Inc., and each of
              British  Aerospace  Holdings,  Inc.  and  Matra  Marconi  Space UK
              Limited.
5.1           Opinion of Hogan & Hartson L.L.P.
8.1           Opinion  of Ernst & Young  L.L.P.  with  respect  to  certain  tax
              matters.

                                      II-2

<PAGE>
10.1          Second Amended and Restated  Purchase  Agreement,  dated September
              26,  1991,  ("Satellite  Contract")  by and between  OrionSat  and
              British  Aerospace  PLC  and  the  First  Amendment,  dated  as of
              September  15,  1992,  Second  Amendment,  dated as of November 9,
              1992,  Third  Amendment,  dated  as  of  March  12,  1993,  Fourth
              Amendment,  dated as of April 15, 1993, Fifth Amendment,  dated as
              of September 22, 1993, Sixth Amendment, dated as of April 6, 1994,
              Seventh  Amendment,  dated as of August 9, 1994, Eighth Amendment,
              dated as of December 8, 1994,  and  Amendment  No. 9 dated October
              24, 1995,  thereto.  [CONFIDENTIAL  TREATMENT HAS BEEN GRANTED FOR
              PORTIONS  OF  THESE  DOCUMENTS.]  (Incorporated  by  reference  to
              exhibits  number  10.13 and 10.14 in  Registration  Statement  No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.2          Restated Amendment No. 10, dated December 10, 1996,  between Orion
              Atlantic  and Matra  Marconi  Space,  to the  Second  Amended  and
              Restated  Purchase  Agreement,  dated  September  26,  1991 by and
              between  OrionSat and British  Aerospace  PLC (which  contract and
              prior exhibits  thereto were  incorporated by reference as exhibit
              number 10.1).
10.3          Ground  Support System  Agreement,  dated as of August 2, 1991, by
              and between Orion  Atlantic and  Telespazio  S.p.A.  [CONFIDENTIAL
              TREATMENT  HAS  BEEN  GRANTED  FOR  PORTIONS  OF  THIS  DOCUMENT.]
              (Incorporated by reference to exhibit number 10.25 in Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.4          Italian  Facility  and Services  Agreement,  dated as of August 2,
              1991, by and between OrionSat and Telespazio  S.p.A. as amended by
              the  amendment  thereto,  dated  March  19,  1994.   [CONFIDENTIAL
              TREATMENT  HAS BEEN  GRANTED  FOR  PORTIONS  OF THESE  DOCUMENTS.]
              (Incorporated by reference to exhibit number 10.26 in Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.5          Contract for a Satellite  Control System,  dated December 7, 1992,
              by and  between  Orion  Atlantic,  Telespazio  S.p.A.  and  Martin
              Marietta Corporation. [CONFIDENTIAL TREATMENT HAS BEEN GRANTED FOR
              PORTIONS OF THIS DOCUMENT.]  (Incorporated by reference to exhibit
              number 10.31 in Registration Statement No. 33-80518 on Form S-1 of
              Orion Network Systems, Inc.)
10.6          Credit  Agreement,  dated as of November 23, 1993,  by and between
              Orion Atlantic,  OrionSat and General Electric Capital Corporation
              ("GECC"). [CONFIDENTIAL TREATMENT HAS BEEN GRANTED FOR PORTIONS OF
              THIS DOCUMENT.] (Incorporated by reference to exhibit number 10.32
              in  Registration  Statement  No.  33-80518  on Form  S-1 of  Orion
              Network Systems, Inc.)
10.7          Security Agreement,  dated as of November 23, 1993, by and between
              Orion Atlantic,  OrionSat and GECC.  (Incorporated by reference to
              exhibit  number 10.33 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.8          Assignment and Security Agreement,  dated as of November 23, 1993,
              by and between Orion Atlantic, OrionSat and GECC. (Incorporated by
              reference to exhibit  number 10.34 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.9          Consent and  Agreement,  dated as of  November  23,  1993,  by and
              between Orion  Atlantic,  Martin  Marietta  Corporation  and GECC.
              (Incorporated by reference to exhibit number 10.35 in Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.10         Deed of Trust, dated as of November 23, 1993, by and between Orion
              Atlantic,  W. Allen Ames, Jr. and Michael J. Schwel,  as Trustees,
              and GECC.  (Incorporated  by reference to exhibit  number 10.37 in
              Registration  Statement No.  33-80518 on Form S-1 of Orion Network
              Systems, Inc.)
10.11         Lease  Agreement,  dated as of November 23,  1993,  by and between
              OrionNet,  Inc. and Orion  Atlantic,  as amended by an  Amendment,
              dated  January 3, 1995.  [CONFIDENTIAL  TREATMENT HAS BEEN GRANTED
              FOR PORTIONS OF THESE  DOCUMENTS.]  (Incorporated  by reference to
              exhibit  number 10.38 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)

                                      II-3

<PAGE>
10.12         Note for Interim  Loans,  dated as of November  23,  1993,  by and
              between  Orion  Atlantic and GECC.  (Incorporated  by reference to
              exhibit  number 10.42 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.13         Sales  Representation  Agreement  and  Ground  Operations  Service
              Agreement,  each dated as of May 1, 1994 and June 30, 1994, by and
              between  each  of  OrionNet,  Inc.  and  Kingston  Communications,
              respectively,  and Orion Atlantic,  as amended by side agreements,
              dated  May  1,  1994,   July  12,  1994  and   February  1,  1995.
              [CONFIDENTIAL  TREATMENT  HAS BEEN  GRANTED FOR  PORTIONS OF THESE
              DOCUMENTS.]  (Incorporated by reference to exhibit number 10.43 in
              Registration  Statement No.  33-80518 on Form S-1 of Orion Network
              Systems, Inc.)
10.14         Lease  Agreement,  dated as of  October 2,  1992,  by and  between
              OrionNet and Research  Grove  Associates,  as amended by Amendment
              No. 1, dated March 26,  1993,  Amendment  No. 2, dated  August 23,
              1993, and Amendment No. 3, dated December 20, 1993.  (Incorporated
              by reference to exhibit number 10.38 in Registration Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.15         Sales  Representation  Agreement  and  Ground  Operations  Service
              Agreement,  dated  as of June 30,  1995,  by and  between  MCN Sat
              Service, S.A. and Orion Atlantic. [CONFIDENTIAL TREATMENT HAS BEEN
              GRANTED FOR PORTIONS OF THIS DOCUMENT.] (Incorporated by reference
              to exhibit  number  10.69 in Orion's  Registration  Statement  No.
              33-80518 on Form S-1.)
10.16         Volume Purchase Agreement,  dated January 18, 1995, by and between
              the Company and Dornier  GmbH.  [CONFIDENTIAL  TREATMENT  HAS BEEN
              GRANTED FOR PORTIONS OF THIS DOCUMENT.] (Incorporated by reference
              to exhibit number 10.66 in Registration  Statement No. 33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.17         Product  Development,   License  and  Marketing  Agreement,  dated
              January 18,  1995,  by and  between the Company and Dornier  GmbH.
              [CONFIDENTIAL  TREATMENT  HAS BEEN  GRANTED  FOR  PORTIONS OF THIS
              DOCUMENT.]  (Incorporated  by reference to exhibit number 10.65 in
              Orion's Registration Statement No. 33-80518 on Form S-1.)
10.18         Sales Representation  Agreement,  dated as of June 8, 1995, by and
              between  Nortel  Dasa  Network  Systems  GmbH & Co.  KG and  Orion
              Atlantic. [CONFIDENTIAL TREATMENT HAS BEEN GRANTED FOR PORTIONS OF
              THIS DOCUMENT.] (Incorporated by reference to exhibit number 10.70
              in  Registration  Statement  No.  33-80518  on Form  S-1 of  Orion
              Network Systems, Inc.)
10.19         Orion 2 Spacecraft Purchase Contract, dated July 31, 1996, between
              Orion  Atlantic and Matra Marconi Space.  [CONFIDENTIAL  TREATMENT
              HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]
10.20         Orion's  Amended and  Restated  1987 Stock Option Plan as amended.
              (Incorporated by reference to exhibit number 10.23 in Registration
              Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.21         Purchase  Contract,   dated  December  4,  1991,  by  and  between
              OrionNet,   Inc.,   Shenandoah  Valley  Leasing  Company  and  MCI
              Telecommunications  Corporation.  [CONFIDENTIAL TREATMENT HAS BEEN
              GRANTED FOR PORTION OF THIS DOCUMENT.]  (Incorporated by reference
              to exhibit number 10.30 in Registration  Statement No. 33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.22         Amended and  Restated  Partnership  Agreement  of Orion  Financial
              Partnership,  dated as of April 15, 1994, by and between  OrionNet
              and Computer Leasing Inc.  ("CLI").  (Incorporated by reference to
              exhibit  number 10.44 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.23         Continuing Guaranty, dated as of April 15, 1994, of the Company of
              the obligations of OrionNet Finance Corporation.  (Incorporated by
              reference to exhibit  number 10.45 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)

                                      II-4

<PAGE>
10.24         Release of Continuing Guaranty,  dated as of December 29, 1994, by
              the Orion  Financial  Partnership.  (Incorporated  by reference to
              exhibit  number 10.46 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.25         Confirmation  of  Continuing  Guaranty,  dated as of December  29,
              1994, of the Company of the  obligation of OFC.  (Incorporated  by
              reference to exhibit  number 10.47 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.26         Continuing  Guarantee,  dated as of December 29,  1994,  by Lessor
              Capital  Funding  Limited  Partnership in favor of Orion Financial
              Partnership. (Incorporated by reference to exhibit number 10.48 in
              Registration  Statement No.  33-80518 on Form S-1 of Orion Network
              Systems, Inc.)
10.27         Master Lease Agreement, dated as of April 15, 1994, by and between
              OrionNet  and  Orion  Financial   Partnership.   (Incorporated  by
              reference to exhibit  number 10.49 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.28         Collateral  Assignment  and Pledge and Security  Agreement,  dated
              April  22,   1994,   by  and  between  CLI  and  Orion   Financial
              Partnership. (Incorporated by reference to exhibit number 10.50 in
              Registration  Statement No.  33-80518 on Form S-1 of Orion Network
              Systems, Inc.)
10.29         Purchase  Agreement,  dated as of April 22,  1994,  by and between
              OrionNet  and  Orion  Financial   Partnership.   (Incorporated  by
              reference to exhibit  number 10.51 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.30         Stock  Purchase  Agreement,  dated as of April  29,  1994,  by and
              between  the  Company  and SS/L.  (Incorporated  by  reference  to
              exhibit  number 10.53 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.31         Registration Rights Agreement,  dated as of April 29, 1994, by and
              between  the  Company  and SS/L.  (Incorporated  by  reference  to
              exhibit  number 10.54 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.32         Purchase Agreement,  dated as of June 17, 1994, by and between the
              Company,  CIBC, Fleet and Chisholm.  (Incorporated by reference to
              exhibit  number 10.55 in  Registration  Statement No.  33-80518 on
              Form S-1 of Orion Network Systems, Inc.)
10.33         Stockholders Agreement,  dated as of June 17, 1994, by and between
              the  Company,   CIBC,   Fleet,   Chisholm  and  certain  principal
              stockholders of the Company. (Incorporated by reference to exhibit
              number 10.56 in Registration Statement No. 33-80518 on Form S-1 of
              Orion Network Systems, Inc.)
10.34         Registration  Rights Agreement,  dated as of June 17, 1994, by and
              between the Company,  CIBC,  Fleet and Chisholm.  (Incorporated by
              reference to exhibit  number 10.57 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.35         Purchase  Agreement,  dated as of June 19, 1995,  by and among the
              Company,  CIBC, Fleet and an affiliate of Fleet.  (Incorporated by
              reference to exhibit  number 10.58 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.36         Definitive  Agreement,  dated April 26, 1990, by and between Orion
              Asia Pacific and the Republic of the Marshall  Islands and a Stock
              Option Agreement related thereto. [CONFIDENTIAL TREATMENT HAS BEEN
              GRANTED  FOR  PORTIONS  OF  THESE  DOCUMENTS.]   (Incorporated  by
              reference to exhibit  number 10.60 in  Registration  Statement No.
              33-80518 on Form S-1 of Orion Network Systems, Inc.)
10.37         Option  Agreement,  dated  December 10, 1996, by and between Orion
              Atlantic and Matra Marconi Space. [CONFIDENTIAL TREATMENT HAS BEEN
              REQUESTED FOR PORTIONS OF THIS DOCUMENT.]
10.38         Memorandum of Agreement for the Procurement of Orion 2 Spacecraft,
              dated  December 10, 1996, by and between Orion  Atlantic and Matra
              Marconi  Space.  [CONFIDENTIAL  TREATMENT  HAS BEEN  REQUESTED FOR
              PORTIONS OF THIS DOCUMENT.]

                                      II-5

<PAGE>
10.39         TT&C Earth  Station  Agreement,  dated as of November 11, 1996, by
              and  between  Orion Asia  Pacific  and DACOM  Corp.  [CONFIDENTIAL
              TREATMENT HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]
10.40         Joint Investment Agreement,  dated as of November 11, 1996, by and
              between Orion Asia Pacific and DACOM Corp. [CONFIDENTIAL TREATMENT
              HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]
10.41         Orion  Network   Systems,   Inc.   Employee  Stock  Purchase  Plan
              (Incorporated  by reference to exhibit number 4.4 in  Registration
              Statement  No.  333-19021  on Form S-8 of Orion  Network  Systems,
              Inc.)
10.42         Orion  Network   Systems,   Inc.   401(k)   Profit   Sharing  Plan
              (Incorporated  by reference to exhibit number 4.5 in  Registration
              Statement  No.  333-19021  on Form S-8 of Orion  Network  Systems,
              Inc.)
10.43         Orion Network Systems, Inc. Non-Employee Director Stock Option Plan
10.44         Exchange  Agreement  dated  June  __,  1996  among  Orion  Network
              Systems,  Orion  Atlantic,   OrionSat  and  the  Limited  Partners
              (Incorporated by reference to exhibit 10 in Current Report on Form
              8-K dated December 20, 1995, of Orion Network Systems, Inc.)
10.45         First  Amendment to Exchange  Agreement  dated  December ___, 1996
              among Orion  Network  Systems,  Orion  Atlantic,  OrionSat and the
              Limited Partners.
10.46         Redemption  Agreement dated November 21, 1995, by and between STET
              and Orion Atlantic,  the promissory notes delivered thereunder and
              Instrument  of  Redemption   relating  thereto   (Incorporated  by
              reference  to exhibit  number  10.1 in Current  Report on Form 8-K
              dated November 21, 1995 of Orion Network Systems, Inc.)
10.47         IPSP-Telecom  Italia  Agreement  dated  November 21, 1995,  by and
              between Telecom Italia and Orion Atlantic. [CONFIDENTIAL TREATMENT
              HAS BEEN REQUESTED FOR PORTIONS OF THIS  DOCUMENT.]  (Incorporated
              by reference to exhibit  number 10.2 in Current Report on Form 8-K
              dated November 21, 1995 of Orion Network Systems, Inc.)
10.48         Indemnity  Agreement dated November 21, 1995, by and among Telecom
              Italia, Orion Atlantic,  Orion and STET (Incorporated by reference
              to  exhibit  number  10.3 in  Current  Report  on Form  8-K  dated
              November 21, 1995 of Orion Network Services, Inc.)
10.49         Subscription  Agreement  dated  November 21, 1995,  by and between
              Orion  and  Orion  Atlantic,  and the  promissory  note  delivered
              thereunder  (Incorporated  by reference to exhibit  number 10.5 in
              Current  Report  on Form  8-K  dated  November  21,  1995 of Orion
              Network Systems,  Inc.).
10.50         First  Amendment to the Italian  Facility  and Services  Agreement
              dated  November 21, 1995, by and between Orion  Atlantic and Nuova
              Telespazio  (Incorporated  by reference to exhibit  number 10.7 in
              Current  Report  on Form  8-K  dated  November  21,  1995 of Orion
              Network Systems, Inc.).
10.51         Registration  Rights  Agreement,  dated  January 13, 1997,  by and
              among Orion Newco  Services,  Inc.,  British  Aerospace  Holdings,
              Inc., and Matra Marconi Space UK Limited.
21.1          List of subsidiaries of Orion.
23.1          Consent of Ernst & Young LLP.
23.2          Consent of Hogan & Hartson L.L.P. (included in their opinion filed
              as Exhibit 5.1).
23.3          Consent of Salomon Brothers Inc.
24.1          Powers  of  Attorney  (included  on  the  signature  pages  of the
              Registration Statement).
99.1          Orders of FCC regarding  OrionSat.  (Incorporated  by reference to
              exhibit number 99.1 in Registration Statement No. 33-80518 on Form
              S-1 of Orion Network Systems, Inc.).
99.2          Opinion of Salomon Brothers Inc. 

</TABLE>


                                      II-6
<PAGE>
ITEM 22. UNDERTAKINGS

The undersigned registrant hereby undertakes:

   (a)(1) To file,  during any period in which offers or sales are being made, a
post-effective amendment to this registration statement;

   (i) To include any prospectus  required by Section 10(a)(3) of the Securities
Act of 1933;

   (ii) To  reflect  in the  prospectus  any facts or events  arising  after the
effective date of the Registration  Statement (or the most recent post-effective
amendment  thereof)  which,  individually  or  in  the  aggregate,  represent  a
fundamental  change in the information set forth in the Registration  Statement.
Notwithstanding the foregoing,  any increase or decrease in volume of securities
offered (if the total dollar value of  securities  offered would not exceed that
which  was  registered)  and any  deviation  from  the  low or  high  end of the
estimated  maximum  offering  range may be reflected  in the form of  prospectus
filed with the  Commission  pursuant  to Rule 424(b) if, in the  aggregate,  the
changes in volume and price  represent  no more than a 20 percent  change in the
maximum  aggregate  offering price set forth in the "Calculation of Registration
Fee" table in the effective registration statement;

   (iii)  To  include  any  material  information  with  respect  to the plan of
distribution  not  previously  disclosed  in the  registration  statement or any
material change to such information in the registration statement;

   (2) That, for the purpose of determining  any liability  under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.

   (3) To remove from registration by means of a post-effective amendment any of
the securities  being  registered  which remain unsold at the termination of the
offering.

   (b) to respond to requests for information  that is incorporated by reference
into the prospectus  pursuant to Item 4, 10(b),  11, or 13 of this Form,  within
one  business  day of  receipt  of such  request,  and to send the  incorporated
documents  by first class mail or other  equally  prompt  means.  This  includes
information contained in documents filed subsequent to the effective date of the
registration statement through the date of responding to the request.

   (c) to supply by means of post-effective amendment all information concerning
a transaction, and the company being acquired involved therein, that was not the
subject of and included in the registration statement when it became effective.

                                      II-7


<PAGE>


                                   SIGNATURES

                  Pursuant to the requirements of the Securities Act of 1933, as
amended, the Registrant has duly caused this Registration Statement to be signed
on its behalf by the  undersigned,  thereunto  duly  authorized,  in the City of
Rockville, State of Maryland, on the 14th day of January, 1997.

                              
`                                      ORION NEWCO SERVICES, INC.


                                       By:  /s/ W. Neil Bauer
                                           --------------------------------
                                            W. Neil Bauer
                                            President


                                POWER OF ATTORNEY

                  Know all Men by These  Presents,  that each  individual  whose
signature  appears  below  constitutes  and  appoints W. Neil Bauer and David J.
Frear, and each of them, his true and lawful  attorney-in-fact  and agent,  with
power of substitution  and  resubstitution,  for him and in his name,  place and
stead,  in any and all  capacities,  to sign any and all  amendments  (including
post-effective amendments) to this Registration Statement, and to file the same,
with all exhibits thereto and other documents in connection therewith,  with the
Securities and Exchange  Commission,  granting unto said  attorneys-in-fact  and
agents,  and each of them,  full power and  authority to do and perform each and
every  act and  thing  requisite  and  necessary  to be done  in and  about  the
premises,  as  fully  to all  intents  and  purposes  as he might or could do in
person,  hereby  ratifying and confirming all that said  attorneys-in-  fact and
agents,  or any of them, or their,  his or her  substitutes or  substitute,  may
lawfully do or cause to be done by virtue hereof.

                  Pursuant to the requirements of the Securities Act of 1933, as
amended,  this  Registration  Statement  has been signed below by the  following
persons in the capacities and on the dates indicated.


<TABLE>
<CAPTION>

          Signature                                 Title                              Date
          ---------                                 -----                              ----

<S>                                     <C>                                         <C>
/s/ W. Neil Bauer
- -------------------------------               President and Director                January 14, 1997
       W. Neil Bauer                      (Principal Executive Officer)

/s/ David J. Frear
- -------------------------------          Vice President, Chief Financial            January 14, 1997
         David J. Frear                       Officer and Director
                                          (Principal Financial Officer
                                        and Principal Accounting Officer)

/s/  Richard H. Shay
- --------------------------------              Secretary and Director                January 14, 1997
        Richard H. Shay

</TABLE>





                                      II-8


<PAGE>


    As filed with the Securities and Exchange Commission on January ___, 1997

                                                   Registration No. 333-_______

================================================================================




                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549




                                 ---------------



                                    EXHIBITS


                                       to


                                    FORM S-4


                             REGISTRATION STATEMENT


                                      Under


                           THE SECURITIES ACT OF 1933



                                 ---------------



                           ORION NEWCO SERVICES, INC.
             (Exact name of Registrant as specified in its charter)



================================================================================




<PAGE>


                                  EXHIBIT INDEX

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    ------


2.1    Agreement  and Plan of Merger  dated  January 8, 1997,  by and among
       Orion Network Systems,  Inc.,  Orion Newco Services,  Inc. and Orion
       Merger  Co,   Inc.   (Included   as   Attachment   A  to  the  Proxy
       Statement/Prospectus   which   is  a  part  of   this   Registration
       Statement.).

3.1    Form  of  Restated  Certificate  of  Incorporation  of  Orion  Newco   *
       Services, Inc.

3.2    Bylaws of Orion Newco Services, Inc.                                   *

3.3    Certificate  of  Incorporation   of  Orion  Network  Systems,   Inc.
       (Incorporated  by  reference to exhibit  number 3.1 in  Registration
       Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)

3.4    Bylaws of Orion Network Systems, Inc.  (Incorporated by reference to
       exhibit number 3.2 in  Registration  Statement No.  33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

4.1    Forms of Warrant  issued by Orion.  (Incorporated  by  reference  to   *
       exhibit number 4.1 in  Registration  Statement No.  33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

4.2    Forms of  Warrant  issued by Orion to holders  of  Preferred  Stock.   *
       (Incorporated  by  reference to exhibit  number 4.2 in  Registration
       Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)

4.3    Forms of  Certificates  of  Designation  of  Series A 8%  Cumulative   *
       Redeemable  Convertible  Preferred  Stock,  Series  B 8%  Cumulative
       Redeemable  Convertible  Preferred  Stock and Series C 6% Cumulative
       Redeemable Convertible Preferred Stock.

4.4    Forms of Series A  Preferred  Stock,  Series B  Preferred  Stock and   *
       Series C Preferred Stock Certificates of Orion.

4.5    Form of Common Stock Certificate of Orion.                             *

4.6    Form of Warrant issued to DACOM Corp.                                  *

4.7    Note  Purchase  Agreement  with British  Aerospace and Matra Marconi   *
       Space

5.1    Opinion of Hogan & Hartson L.L.P.

8.1    Opinion of Ernst & Young L.L.P. with respect to certain tax matters    *

10.1   Second Amended and Restated Purchase Agreement,  dated September 26,
       1991,  ("Satellite  Contract")  by and between  OrionSat and British
       Aerospace  PLC and the First  Amendment,  dated as of September  15,
       1992,  Second  Amendment,  dated  as  of  November  9,  1992,  Third
       Amendment, dated as of March 12, 1993, Fourth Amendment, dated as of
       April 15, 1993,  Fifth  Amendment,  dated as of September  22, 1993,
       Sixth Amendment, dated as of April 6, 1994, Seventh Amendment, dated
       as of August 9, 1994,  Eighth  Amendment,  dated as of  December  8,
       1994,  and  Amendment  No.  9  dated  October  24,  1995,   thereto.
       [CONFIDENTIAL  TREATMENT  HAS BEEN  GRANTED  FOR  PORTIONS  OF THESE
       DOCUMENTS.]  (Incorporated by reference to exhibits number 10.13 and


<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----
  
       10.14 in  Registration  Statement No.  33-80518 on Form S-1 of Orion   *
       Network Systems, Inc.)

10.2   Restated  Amendment  No. 10, dated  December 10, 1996, between Orion   *
       Atlantic and Matra Marconi Space, to the Second Amended and Restated
       Purchase Agreement, dated September 26, 1991 by and between OrionSat
       and British Aerospace PLC (which contract and prior exhibits thereto
       were   incorporated   by   reference   as  exhibit   number   10.1).
       [CONFIDENTIAL  TREATMENT  HAS BEEN  REQUESTED  FOR  PORTIONS OF THIS
       DOCUMENT.]

10.3   Ground Support System Agreement,  dated as of August 2, 1991, by and   *
       between Orion Atlantic and Telespazio S.p.A. [CONFIDENTIAL TREATMENT
       HAS BEEN GRANTED FOR PORTIONS OF THIS  DOCUMENT.]  (Incorporated  by
       reference to exhibit  number  10.25 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.4   Italian Facility and Services Agreement, dated as of August 2, 1991,   *
       by and between  OrionSat  and  Telespazio  S.p.A.  as amended by the
       amendment thereto, dated March 19, 1994. [CONFIDENTIAL TREATMENT HAS
       BEEN  GRANTED FOR  PORTIONS OF THESE  DOCUMENTS.]  (Incorporated  by
       reference to exhibit  number  10.26 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.5   Contract for a Satellite Control System,  dated December 7, 1992, by   *
       and between Orion Atlantic,  Telespazio  S.p.A.  and Martin Marietta
       Corporation.  [CONFIDENTIAL  TREATMENT HAS BEEN GRANTED FOR PORTIONS
       OF THIS  DOCUMENT.]  (Incorporated  by reference  to exhibit  number
       10.31 in  Registration  Statement No.  33-80518 on Form S-1 of Orion
       Network Systems, Inc.)

10.6   Credit  Agreement,  dated as of November  23,  1993,  by and between   *
       Orion Atlantic,  OrionSat and General Electric  Capital  Corporation
       ("GECC").  [CONFIDENTIAL  TREATMENT HAS BEEN GRANTED FOR PORTIONS OF
       THIS DOCUMENT.]  (Incorporated  by reference to exhibit number 10.32
       in Registration  Statement No. 33-80518 on Form S-1 of Orion Network
       Systems, Inc.)

10.7   Security  Agreement,  dated as of November 23, 1993,  by and between   *
       Orion  Atlantic,  OrionSat and GECC.  (Incorporated  by reference to
       exhibit number 10.33 in Registration  Statement No. 33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

10.8   Assignment and Security Agreement, dated as of November 23, 1993, by   *
       and between  Orion  Atlantic,  OrionSat and GECC.  (Incorporated  by
       reference to exhibit  number  10.34 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.9   Consent and Agreement, dated as of November 23, 1993, by and between   *
       Orion Atlantic,  Martin Marietta Corporation and GECC. (Incorporated
       by reference to exhibit number 10.35 in  Registration  Statement No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)


<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----

10.10  Deed of Trust,  dated as of November 23, 1993,  by and between Orion   *
       Atlantic, W. Allen Ames, Jr. and Michael J. Schwel, as Trustees, and
       GECC.   (Incorporated  by  reference  to  exhibit  number  10.37  in
       Registration  Statement  No.  33-80518 on Form S-1 of Orion  Network
       Systems, Inc.)

10.11  Lease  Agreement,  dated as of  November  23,  1993,  by and between   *
       OrionNet, Inc. and Orion Atlantic, as amended by an Amendment, dated
       January  3,  1995.  [CONFIDENTIAL  TREATMENT  HAS BEEN  GRANTED  FOR
       PORTIONS OF THESE DOCUMENTS.]  (Incorporated by reference to exhibit
       number 10.38 in  Registration  Statement No. 33-80518 on Form S-1 of
       Orion Network Systems, Inc.)

10.12  Note for  Interim  Loans,  dated as of  November  23,  1993,  by and   *
       between  Orion  Atlantic  and GECC.  (Incorporated  by  reference to
       exhibit number 10.42 in Registration  Statement No. 33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

10.13  Sales   Representation   Agreement  and  Ground  Operations  Service   *
       Agreement,  each dated as of May 1, 1994 and June 30,  1994,  by and
       between  each  of  OrionNet,   Inc.  and  Kingston   Communications,
       respectively,  and Orion  Atlantic,  as amended by side  agreements,
       dated May 1, 1994, July 12, 1994 and February 1, 1995. [CONFIDENTIAL
       TREATMENT  HAS  BEEN  GRANTED  FOR  PORTIONS  OF  THESE  DOCUMENTS.]
       (Incorporated  by reference to exhibit number 10.43 in  Registration
       Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.14  Lease  Agreement,  dated  as of  October  2,  1992,  by and  between   *
       OrionNet and Research Grove Associates,  as amended by Amendment No.
       1, dated March 26, 1993, Amendment No. 2, dated August 23, 1993, and
       Amendment No. 3, dated December 20, 1993. (Incorporated by reference
       to exhibit number 10.38 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.15  Sales   Representation   Agreement  and  Ground  Operations  Service   *
       Agreement,  dated  as of  June  30,  1995,  by and  between  MCN Sat
       Service, S.A. and Orion Atlantic.  [CONFIDENTIAL  TREATMENT HAS BEEN
       GRANTED FOR PORTIONS OF THIS DOCUMENT.]  (Incorporated  by reference
       to  exhibit  number  10.69 in  Orion's  Registration  Statement  No.
       33-80518 on Form S-1.)

10.16  Volume  Purchase  Agreement,  dated January 18, 1995, by and between   *
       the Company  and  Dornier  GmbH.  [CONFIDENTIAL  TREATMENT  HAS BEEN
       GRANTED FOR PORTIONS OF THIS DOCUMENT.]  (Incorporated  by reference
       to exhibit number 10.66 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.17  Product Development,  License and Marketing Agreement, dated January   *
       18, 1995, by and between the Company and Dornier GmbH. [CONFIDENTIAL
       TREATMENT   HAS  BEEN  GRANTED  FOR  PORTIONS  OF  THIS   DOCUMENT.]
       (Incorporated  by  reference  to  exhibit  number  10.65 in  Orion's
       Registration Statement No. 33-80518 on Form S-1.)

<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----

10.18  Sales  Representation  Agreement,  dated as of June 8, 1995,  by and   *
       between  Nortel  Dasa  Network  Systems  GmbH  & Co.  KG  and  Orion
       Atlantic.  [CONFIDENTIAL  TREATMENT HAS BEEN GRANTED FOR PORTIONS OF
       THIS DOCUMENT.] (Incorporated  by reference to exhibit  number 10.70
       in  Registration Statement No. 33-80518 on Form S-1 of Orion Network
       Systems, Inc.)
 
10.19  Orion 2 Spacecraft  Purchase Contract,  dated July 31, 1996, between   *
       Orion Atlantic and Matra Marconi Space.  [CONFIDENTIAL TREATMENT HAS
       BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]

10.20  Orion's  Amended  and  Restated  1987 Stock  Option Plan as amended.   *
       (Incorporated  by reference to exhibit number 10.23 in  Registration
       Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.21  Purchase Contract,  dated December 4, 1991, by and between OrionNet,   *
       Inc.,  Shenandoah Valley Leasing Company and MCI  Telecommunications
       Corporation. [CONFIDENTIAL TREATMENT HAS BEEN GRANTED FOR PORTION OF
       THIS DOCUMENT.]  (Incorporated  by reference to exhibit number 10.30
       in Registration  Statement No. 33-80518 on Form S-1 of Orion Network
       Systems, Inc.)

10.22  Amended  and  Restated  Partnership  Agreement  of  Orion  Financial   *
       Partnership, dated as of April 15, 1994, by and between OrionNet and
       Computer Leasing Inc. ("CLI"). (Incorporated by reference to exhibit
       number 10.44 in  Registration  Statement No. 33-80518 on Form S-1 of
       Orion Network Systems, Inc.)

10.23  Continuing  Guaranty,  dated as of April 15, 1994, of the Company of   *
       the obligations of OrionNet  Finance  Corporation.  (Incorporated by
       reference to exhibit  number  10.45 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.24  Release of  Continuing  Guaranty,  dated as of December 29, 1994, by   *
       the Orion  Financial  Partnership.  (Incorporated  by  reference  to
       exhibit number 10.46 in Registration  Statement No. 33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

10.25  Confirmation of Continuing Guaranty,  dated as of December 29, 1994,   *
       of the Company of the obligation of OFC.  (Incorporated by reference
       to exhibit number 10.47 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.26  Continuing  Guarantee,  dated as of  December  29,  1994,  by Lessor   *
       Capital  Funding  Limited  Partnership  in favor of Orion  Financial
       Partnership.  (Incorporated  by reference to exhibit number 10.48 in
       Registration  Statement  No.  33-80518 on Form S-1 of Orion  Network
       Systems, Inc.)

10.27  Master Lease  Agreement,  dated as of April 15, 1994, by and between   *
       OrionNet and Orion Financial Partnership. (Incorporated by reference
       to exhibit number 10.49 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.28  Collateral Assignment and Pledge and Security Agreement, dated April   *
       22,  1994,  by and  between  CLI and  Orion  Financial  Partnership.


<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----

       (Incorporated  by reference to exhibit number 10.50 in  Registration
       Statement No. 33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.29  Purchase  Agreement,  dated as of April  22,  1994,  by and  between   *
       OrionNet and Orion Financial Partnership. (Incorporated by reference
       to exhibit number 10.51 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.30  Stock Purchase Agreement, dated as of April 29, 1994, by and between   *
       the Company and SS/L.  (Incorporated  by reference to exhibit number
       10.53 in  Registration  Statement No.  33-80518 on Form S-1 of Orion
       Network Systems, Inc.)

10.31  Registration  Rights  Agreement,  dated as of April 29, 1994, by and   *
       between the Company and SS/L.  (Incorporated by reference to exhibit
       number 10.54 in  Registration  Statement No. 33-80518 on Form S-1 of
       Orion Network Systems, Inc.)

10.32  Purchase  Agreement,  dated as of June 17, 1994,  by and between the   *
       Company,  CIBC,  Fleet and Chisholm.  (Incorporated  by reference to
       exhibit number 10.55 in Registration  Statement No. 33-80518 on Form
       S-1 of Orion Network Systems, Inc.)

10.33  Stockholders  Agreement,  dated as of June 17, 1994,  by and between   *
       the  Company,   CIBC,   Fleet,   Chisholm   and  certain   principal
       stockholders of the Company.  (Incorporated  by reference to exhibit
       number 10.56 in  Registration  Statement No. 33-80518 on Form S-1 of
       Orion Network Systems, Inc.)

10.34  Registration  Rights  Agreement,  dated as of June 17, 1994,  by and   *
       between the Company,  CIBC,  Fleet and  Chisholm.  (Incorporated  by
       reference to exhibit  number  10.57 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.35  Purchase  Agreement,  dated as of June 19,  1995,  by and  among the   *
       Company,  CIBC,  Fleet and an affiliate of Fleet.  (Incorporated  by
       reference to exhibit  number  10.58 in  Registration  Statement  No.
       33-80518 on Form S-1 of Orion Network Systems, Inc.)

10.36  Definitive  Agreement,  dated April 26, 1990,  by and between  Orion   *
       Asia Pacific and the  Republic of the  Marshall  Islands and a Stock
       Option Agreement related thereto.  [CONFIDENTIAL  TREATMENT HAS BEEN
       GRANTED FOR PORTIONS OF THESE DOCUMENTS.] (Incorporated by reference
       to exhibit number 10.60 in  Registration  Statement No.  33-80518 on
       Form S-1 of Orion Network Systems, Inc.)

10.37  Option  Agreement,  dated  December 10, 1996,  by and between  Orion   *
       Atlantic and Matra Marconi Space.  [CONFIDENTIAL  TREATMENT HAS BEEN
       REQUESTED FOR PORTIONS OF THIS DOCUMENT.]

10.38  Memorandum of Agreement for the  Procurement  of Orion 2 Spacecraft,   *
       dated  December 10, 1996,  by and between  Orion  Atlantic and Matra
       Marconi  Space.  [CONFIDENTIAL  TREATMENT  HAS  BEEN  REQUESTED  FOR
       PORTIONS OF THIS DOCUMENT.]

10.39  TT&C Earth Station Agreement,  dated as of November 11, 1996, by and   *


<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----

       between Orion Asia Pacific and DACOM Corp.  [CONFIDENTIAL  TREATMENT
       HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]

10.40  Joint  Investment  Agreement,  dated as of November 11, 1996, by and   *
       between Orion Asia Pacific and DACOM Corp.  [CONFIDENTIAL  TREATMENT
       HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]

10.41  Orion  Network   Systems,   Inc.   Employee   Stock   Purchase  Plan   *
       (Incorporated  by  reference to exhibit  number 4.4 in  Registration
       Statement No. 333-19021 on Form S-8 of Orion Network Systems, Inc.)

10.42  Orion Network Systems, Inc. 401(k) Profit Sharing Plan (Incorporated   *
       by reference to exhibit  number 4.5 in  Registration  Statement  No.
       333-19021 on Form S-8 of Orion Network Systems, Inc.)

10.43  Orion Network Systems, Inc. Non-Employee Director  Stock Option Plan   

10.44  Exchange  Agreement dated June __, 1996 among Orion Network Systems,   *
       Orion Atlantic,  OrionSat and the Limited Partners  (Incorporated by
       reference to exhibit 10 in Current Report on Form 8-K dated December
       20, 1995, of Orion Network Systems, Inc.)

10.45  First Amendment to Exchange Agreement dated December ___, 1996 among
       Orion  Network  Systems,  Orion  Atlantic,  OrionSat and the Limited
       Partners.

10.46  Redemption  Agreement  dated  November 21, 1995, by and between STET
       and Orion Atlantic,  the promissory  notes delivered  thereunder and
       Instrument of Redemption relating thereto (Incorporated by reference
       to exhibit number 10.1 in Current Report on Form 8-K dated  November
       21,  1995 of Orion  Network Systems, Inc.)

10.47  IPSP-Telecom  Italia  Agreement  dated  November  21,  1995,  by and
       between Telecom Italia and Orion Atlantic.  [CONFIDENTIAL  TREATMENT
       HAS BEEN REQUESTED FOR PORTIONS OF THIS DOCUMENT.]  (Incorporated by
       reference to exhibit number 10.2 in Current Report on Form 8-K dated
       November 21, 1995 of Orion Network Systems, Inc.)

10.48  Indemnity  Agreement  dated  November 21, 1995, by and among Telecom
       Italia, Orion Atlantic, Orion and STET (Incorporated by reference to
       exhibit number 10.3 in Current Report on Form 8-K dated November 21,
       1995 of Orion Network Services, Inc.)

10.49  Subscription Agreement dated November 21, 1995, by and between Orion
       and Orion  Atlantic,  and the promissory  note delivered  thereunder
       (Incorporated  by reference to exhibit number 10.5 in Current Report
       on Form 8-K dated November 21, 1995 of Orion Network Systems, Inc.).

10.50  First Amendment to the Italian Facility and Services Agreement dated
       November  21,  1995,  by  and  between  Orion   Atlantic  and  Nuova
       Telespazio  (Incorporated  by  reference  to exhibit  number 10.7 in
       Current  Report on Form 8-K dated November 21, 1995 of Orion Network
       Systems, Inc.).

<PAGE>

Exhibit                                                                    Page 
Number                     Description                                    Number
- ------                     -----------                                    -----

10.51  Cancellation of Consulting Agreement dated November 16, 1995, by and
       between  Orion  Atlantic  and  Nuova  Telespazio   (Incorporated  by
       reference to exhibit number 10.8 in Current Report on Form 8-K dated
       November 21, 1995 of Orion Network Systems, Inc.).

12.1   Statement  Regarding  Computation  of  Ratio  of  Earnings  to Fixed
       Charges.

21.1   List of subsidiaries of Orion.

23.1   Consent of Ernst & Young LLP

23.2   Consent of Hogan & Hartson  L.L.P.  (included in their opinion filed   *
       as Exhibit 5.1).

23.3   Consent of Salomon Brothers Inc.

24.1   Powers  of  Attorney   (included  on  the  signature  pages  of  the
       Registration Statement).

99.1   Orders of FCC  regarding  OrionSat.  (Incorporated  by  reference to   *
       exhibit number 99.1 in  Registration  Statement No. 33-80518 on Form
       S-1 of Orion Network Systems, Inc.).

99.2   Opinion of Salomon Brothers Inc.







        



                    RESTATED CERTIFICATE OF INCORPORATION OF
                           ORION NEWCO SERVICES, INC.


         Orion Newco Services,  Inc., a corporation organized and existing under
the General Corporation Law of the State of Delaware (the  "Corporation"),  does
hereby certify that:

         1. The present name of the  Corporation is Orion Newco  Services,  Inc.
The  Corporation  was  originally  incorporated  under  the same  name,  and its
original  certificate of incorporation  was filed with the Secretary of State of
the State of Delaware on June 26, 1996.

         2. This Restated  Certificate of Incorporation  restates and integrates
and further amends the  certificate of  incorporation  of the  Corporation  (the
"Certificate  of  Incorporation"),  and has been duly adopted in accordance with
Sections  242 and 245 of the  General  Corporation  Law of the State of Delaware
(the "DGCL").

         3. The text of the Certificate of  Incorporation is hereby restated and
integrated and further amended to read in its entirety as set forth on Exhibit A
attached hereto and incorporated herein by this reference.

         IN WITNESS  WHEREOF,  the Corporation has caused this Certificate to be
duly executed and acknowledged in accordance with Section 103 of the DGCL.

                                                      ORION NEWCO SERVICES, INC.


                                                      By:
                                                         -----------------------

                                                      Name:
                                                           ---------------------

                                                      Title:
                                                            --------------------

<PAGE>

                      RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                           ORION NEWCO SERVICES, INC.


                FIRST: The name of the Corporation is Orion Newco Services, Inc.
(hereinafter called the "Corporation").

                SECOND: The registered office of the Corporation in the State of
Delaware  is 1209  Orange  Street,  Wilmington,  Delaware  19801,  County of New
Castle.  The name of the  Corporation's  registered agent at said address is The
Corporation Trust Company.

                THIRD: The purpose of the Corporation is to engage in any lawful
acts or activities  for which  corporations  may be organized  under the General
Corporation Law of Delaware.

                FOURTH:  The total number of shares of all classes of stock that
the Corporation shall have authority to issue is Forty-One Million  (41,000,000)
shares,  consisting of Forty Million  (40,000,000)  shares of common stock,  par
value $.01 per share, and One Million (1,000,000) shares of preferred stock, par
value $.01 per share.

                A. Common Stock.  Each holder of shares of common stock shall be
entitled  to one vote for each  share of  common  stock  held of  record  on all
matters on which the holders of common stock are  entitled to vote.  There shall
be no cumulative voting rights for the election of directors.

                B.  Preferred  Stock.  The  Board of  Directors  is  authorized,
subject to limitations  prescribed by the Delaware  General  Corporation Law and
the provisions of this Article  FOURTH to provide,  by resolution or resolutions
from time to time adopted without  further  stockholder  approval,  and filing a
Certificate  pursuant  to  the  applicable  provision  of the  Delaware  General
Corporation Law, for the issuance of the shares of Preferred Stock in series, to
establish  from time to time the  number of shares to be  included  in each such
series, and to fix the designation,  powers,  preferences and such rights of the
shares of each such series and the qualifications,  limitations and restrictions
thereof.  The  authority of the Board of  Directors  with respect to each series
shall include, but not be limited to, determination of the following:

                1.  The  number  of  shares  constituting  that  series  and the
distinctive designation of that series.

                                       1

<PAGE>

                2. The  dividend  rate on the  shares  of that  series,  whether
dividends  shall be  cumulative,  and, if so, from which date or dates,  and the
relative  rights of priority,  if any, of payment of dividends on shares of that
series;

                3. Whether that series shall have voting rights,  in addition to
the voting rights provided by law, and, if so, the terms of such voting rights;

                4. Whether that series shall have conversion privileges, and, if
so,  the  terms and  conditions  of such  conversion,  including  provision  for
adjustment of the conversion rate in such events as the Board of Directors shall
determine;

                5. Whether or not the shares of that series shall be redeemable,
and, if so, the terms and  conditions  of such  redemption,  including the dates
upon or after which they shall be  redeemable,  and the amount per share payable
in case of redemption,  which amount may vary under different  conditions and at
different redemption dates;

                6.  Whether  that  series  shall  have a  sinking  fund  for the
redemption  or  purchase  of shares of that  series,  and,  if so, the terms and
amount of such sinking fund;

                7. The  rights  of the  shares  of that  series  in the event of
voluntary  or  involuntary  liquidation,   dissolution  or  winding  up  of  the
Corporation,  and the relative rights of priority,  if any, of payment of shares
of that series; and

                8. Any other relative  rights,  preferences  and  limitations of
that series.

                FIFTH:  The name and mailing  address of the  incorporator  (the
"Incorporator") are Daniel M. Pattarini,  555 Thirteenth Street, NW, Washington,
D.C. 20004.  The powers of the  Incorporator  shall terminate upon the filing of
this Certificate of  Incorporation,  and the names and mailing  addresses of the
persons who are to serve as the  directors  of the  Corporation  until the first
annual meeting of the  stockholders of the Corporation or until their successors
are elected and qualified are as follows:



      NAME                                MAILING ADDRESS

W. Neil Bauer                             2440 Research Boulevard
                                          Rockville, MD 20850

                                       2

<PAGE>

David J. Frear                            2440 Research Boulevard
                                          Rockville, MD 20850

Richard H. Shay                           2440 Research Boulevard
                                          Rockville, MD 20850

                SIXTH:  The authorized  number of directors of this  corporation
shall be not less than 3 and not more than 15.  The number of  directors  within
this range shall be stated in the  Corporation's  Bylaws, as may be amended from
time to time.  When the number of  directors  is changed the Board of  Directors
shall determine the class or classes to which the increased or decreased  number
of directors  shall be  apportioned;  provided  that the directors in each class
shall be as nearly  equal in number as  possible.  No  decrease in the number of
directors  shall  have  the  effect  of  shortening  the  term of any  incumbent
director.

                Effective as of the annual meeting of  stockholders in 1997, the
Board of Directors  shall be divided into three classes,  designated as Class I,
Class II, and Class III, as nearly equal in number as possible,  and the term of
office  of  directors  of one  class  shall  expire at each  annual  meeting  of
stockholders, and in all cases until their successors shall be elected and shall
qualify,  or until their  earlier  resignation,  removal from  office,  death or
incapacity.  The  initial  term of office of Class I shall  expire at the annual
meeting of  stockholders  in 1998,  that of Class II shall  expire at the annual
meeting in 1999,  and that of Class III shall  expire at the  annual  meeting in
2000, and in all cases as to each director until his successor  shall be elected
and shall qualify, or until his earlier resignation,  removal from office, death
or incapacity.

                Subject to the foregoing, at each annual meeting of stockholders
the  successors to the class of directors  whose term shall then expire shall be
elected  to hold  office  for a term  expiring  at the third  succeeding  annual
meeting and until their successors shall be elected and qualified.

                The  directors  remaining in office  acting by a majority  vote,
although  less  than a  quorum,  or by a sole  remaining  director,  are  hereby
expressly  delegated  the power to fill any vacancies in the Board of Directors,
however  occurring,  whether by an increase in the number of  directors,  death,
resignation, retirement, disqualification, removal from office or otherwise, and
any director so chosen  shall hold office  until the next  election of the class
for which such  director  shall have been chosen and until his  successor  shall
have been elected and qualified, or until his earlier resignation,  removal from
office death or incapacity.

                                       3

<PAGE>

                SEVENTH:  In  furtherance  and not in  limitation  of the powers
conferred  by the laws of the State of  Delaware,  the Board of Directors of the
Corporation  is expressly  authorized  and empowered to adopt,  amend and repeal
bylaws of the Corporation.

                EIGHTH:  No director of the  Corporation  shall be liable to the
Corporation  or its  stockholders  for monetary  damages for breach or fiduciary
duty as a director, provided that nothing contained in this Article EIGHTH shall
eliminate  or limit  the  liability  of a  director  (i) for any  breach  of the
director's duty of loyalty to the Corporation or its stockholders, (ii) for acts
or omissions  not in good faith or which  involve  intentional  misconduct  or a
knowing  violation  of law,  (iii)  under  Section 174 of the  Delaware  General
Corporation  Law, or (iv) for any transaction from which the director derived an
improper personal benefit.

                NINTH:  The Corporation  reserves the right at any time and from
time to time, to amend,  alter, change or repeal any provision contained in this
Certificate of Incorporation and other provisions  authorized by the laws of the
State of Delaware at the time in force may be added or  inserted,  in the manner
now or hereafter  prescribed by law, except that Articles FOURTH,  FIFTH, TENTH,
ELEVENTH,  TWELFTH,  THIRTEENTH,  FOURTEENTH  and this Article  NINTH may not be
altered,  amended,  or  repealed  except  by the  affirmative  vote of at  least
two-thirds (2/3) of the shares entitled to vote thereon and the affirmative vote
of the  Board of  Directors;  and all  rights,  preferences  and  privileges  of
whatsoever  nature conferred upon  stockholders,  directors or any other persons
whomsoever by and pursuant to this  Certificate of  Incorporation in its present
form or as hereafter  amended are granted subject to the rights reserved in this
Article NINTH.

                TENTH:  Notwithstanding  any other provision of this Certificate
of Incorporation to the contrary, outstanding shares of stock of the Corporation
shall always be subject to redemption by the Corporation, by action of the Board
of Directors, if in the judgment of the Board of Directors such action should be
taken, pursuant to Section 151(b) of the Delaware General Corporation Law or any
other  applicable  provision of law, to the extent necessary to prevent the loss
or secure the  reinstatement  of any license or franchise from any  governmental
agency held by the Corporation or any of its subsidiaries to conduct any portion
of the business of the Corporation or any of its subsidiaries,  which license or
franchise is  conditioned  upon some or all of the holders of the  Corporation's
stock  possessing  prescribed  qualifications.  The terms and conditions of such
redemption shall be as follows:

                (a) the redemption  price of the shares to be redeemed  pursuant
                to this  Article  TENTH  shall  be  determined  by the  Board of
                Directors  and shall be at least  equal to the lesser of (i) the
                Redemption  Value or (ii) if such  stock was  purchased  by such
                Disqualified  Holders  within one year 

                                       4

<PAGE>


                of the Redemption  Date,  such  Disqualified  Holder's  purchase
                price for such shares;

                (b) the  redemption  price of such  shares  may be paid in cash,
                Redemption Securities or any combination thereof;

                (c) if less than all the shares held by Disqualified Holders are
                to be redeemed,  the shares to be redeemed  shall be selected in
                such manner as shall be  determined  by the Board of  Directors,
                which may include selection first of the most recently purchased
                shares  thereof,  selection  by lot or  selection  in any  other
                manner determined by the Board of Directors;

                (d) at least 30 days'  written  notice  of the  Redemption  Date
                shall be given to the record  holders of the shares  selected to
                be  redeemed  (unless  waived in  writing  by any such  holder),
                provided  that  the  Redemption  Date  may be the  date on which
                written  notice shall be given to record  holders if the cash or
                Redemption  Securities  necessary to effect the redemption shall
                have been  deposited  in trust for the  benefit  of such  record
                holders  and  subject  to  immediate  withdrawal  by  them  upon
                surrender  of the  stock  certificates  of  their  shares  to be
                redeemed;

                (e) from and after the  Redemption  Date,  any and all rights of
                whatever  nature  which  may be held  by the  owners  of  shares
                selected for redemption (including without limitation any rights
                to vote or  participate  in  dividends  declared on stock of the
                same class or series as such shares)  shall cease and  terminate
                and such owners shall  thenceforth  be entitled  only to receive
                the cash or Redemption Securities payable upon redemption; and

                (f) such other terms and  conditions  as the Board of  Directors
                shall determine.

                For purposes of this Article TENTH:

                                  (i)  "Disqualified   Holder"  shall  mean  any
                         holder  of  shares  of stock of the  Corporation  whose
                         holding  of such  stock,  either  individually  or when
                         taken  together  with the holding of shares of stock of
                         the  Corporation by any other holders,  may result,  in
                         the judgment of the Board of Directors, in the loss of,
                         or the  failure  to secure  the  reinstatement  of, any
                         license or franchise from any governmental  agency held
                         by  the  Corporation  on any  of  its  subsidiaries  to
                         conduct any portion of the business of the  Corporation
                         or any of its subsidiaries.

                                       5

<PAGE>

                                  (ii)  "Redemption  Value"  of a  share  of the
                         Corporation's  stock of any class or series  shall mean
                         the average  Closing Price for such a share for each of
                         the 45 most  recent  days on which  shares  of stock of
                         such class or series  shall have been traded  preceding
                         the day on which  notice of  redemption  shall be given
                         pursuant  to  paragraph  (d)  of  this  Article  TENTH;
                         provided,  however,  that if  shares  of  stock of such
                         class  or  series  are  not  traded  on any  securities
                         exchange or in the over-the-counter market, "Redemption
                         Value" shall be determined by the Board of Directors in
                         good  faith.  "Closing  Price"  on any  day  means  the
                         reported  closing  sales price or, in case no such sale
                         takes place,  the average of the  reported  closing bid
                         and  asked  prices  on  the  principal   United  States
                         securities  exchange  registered  under the  Securities
                         Exchange Act of 1934 on which such stock is listed, or,
                         if such stock is not listed on any such  exchange,  the
                         highest  closing  sales price or bid quotation for such
                         stock  on  the  National   Association   of  Securities
                         Dealers, Inc. Automated Quotations System or any system
                         then in use,  or if no such  prices or  quotations  are
                         available, the fair market value on the day in question
                         as determined by the Board of Directors in good faith.

                                  (iii)  "Redemption  Date"  shall mean the date
                         fixed by the Board of Directors  for the  redemption of
                         any shares of stock of the Corporation pursuant to this
                         Article TENTH.

                                  (iv)  "Redemption  Securities"  shall mean any
                         debt or equity  securities of the  Corporation,  any of
                         its  subsidiaries  or  any  other  corporation,  or any
                         combination  thereof,  having such terms and conditions
                         (including,  without  limitation,  in the  case of debt
                         securities,  repayment  over a period  of up to  thirty
                         years,  or a longer period) as shall be approved by the
                         Board of Directors and which, together with any cash to
                         be paid as part of the redemption price, in the opinion
                         of any nationally  recognized  investment  banking firm
                         selected by the Board of Directors (which may be a firm
                         which provides other investment  banking,  brokerage or
                         other services to the Corporation), has a value, at the
                         time  notice  of  redemption   is  given   pursuant  to
                         paragraph  (d) of this  Article,  at least equal to the
                         price  required to be paid pursuant to paragraph (a) of
                         this Article TENTH (assuming, in the case of Redemption
                         Securities  to  be  publicly  traded,  such  Redemption
                         Securities  were fully  distributed and subject only to
                         normal trading activity).

                                       6

<PAGE>

                ELEVENTH:  Control Share Acquisitions

                A. Control Shares.  As used in this Article  ELEVENTH,  "control
share"  means shares of the  Corporation  that would have voting power that when
added to all the other shares of the Corporation owned by a person or in respect
to which that person may exercise or direct the exercise of voting power,  would
entitle that person,  immediately  after  acquisition of the shares (directly or
indirectly,  alone or as part of a group), to exercise or direct the exercise of
the voting power of the  Corporation in the election of directors  within any of
the following ranges of voting power:

                (1) One-fifth or more but less that a third of all voting power.

                (2)  One-third  or more but less than a  majority  of all voting
         power.

                (3) A majority or more of all voting power.


                B.       Control Share Acquisition.

                1. As used in this Article ELEVENTH, "control share acquisition"
means the acquisition (directly or indirectly) by any person of ownership of, or
the power to direct the  exercise of voting  power with  respect to,  issued and
outstanding control shares.

                2. For purposes of this Article ELEVENTH, shares acquired within
ninety (90) days or shares  acquired  pursuant to a plan to make a control share
acquisition are considered to have been acquired in the same acquisition.

                3. For purposes of this Article ELEVENTH,  a person who acquires
shares in the  ordinary  course of  business  for the  benefit of others in good
faith and not for the purpose of circumventing  this Article ELEVENTH has voting
power only of shares in respect of which that  person  would be able to exercise
or direct the vote without further instruction from others.

                4. The  acquisition  of any shares of the  Corporation  does not
constitute a control share  acquisition if the acquisition is consummated in any
of the following circumstances:

                (1) Before April 1, 1992.

                (2)  Pursuant to a binding  contract  existing  before  April 1,
         1992.

                                       7

<PAGE>

                (3) Pursuant to the laws of descent and distribution.

                (4) Pursuant to the  satisfaction  of a pledge or other security
         interest created in good faith and not for the purpose of circumventing
         this Article ELEVENTH.

                (5)  Pursuant  to a  merger  or plan of  share  exchange  if the
         Corporation  is a party to the  agreement  of  merger  of plan of share
         exchange.

                (6) Pursuant to a tender or exchange offer that is made pursuant
         to an agreement to which the Corporation is a party.

                (7)  Directly  from the  Corporation,  or from any of its wholly
         owned subsidiaries.


                5. The  acquisition  of any  shares of the  Corporation  in good
faith and not for the purpose of circumventing  this Article ELEVENTH by or from
(1)  any  person  whose  voting  rights  had  previously   been   authorized  by
stockholders in compliance with this Article  ELEVENTH,  or (2) any person whose
previous  acquisition  of shares of the  Corporation  would have  constituted  a
control share acquisition but for the  circumstances  specified in the paragraph
above, does not constitute a control share  acquisition,  unless the acquisition
entitles the person  (directly or indirectly,  alone or as a part of a group) to
exercise  or direct  the  exercise  of voting  power of the  Corporation  in the
election of directors in excess of the voting power otherwise authorized.

                         C. Interested Shares. As used in this Article ELEVENTH,
"interested  shares" mean the shares of the  Corporation in respect of which any
of the following persons may exercise or direct the exercise of the voting power
of the Corporation in the election of directors:

                (1) An  acquiring  person or member of a group with respect to a
         control share acquisition.

                (2) Any officer of the Corporation.

                (3) Any  employee of the  Corporation  who is also a director of
         the Corporation.


                D. Acquiring Person  Statement.  Any person who proposes to make
or has made a control share  acquisition may at the person's election deliver an

                                       8

<PAGE>

acquiring  person  statement to the Corporation at the  Corporation's  principal
office. The acquiring person statement must set forth all of the following:

                (1) The identity of the  acquiring  person and each other member
         of any group of which the person is a part for purposes of  determining
         control shares.

                (2) A statement  that the  acquiring  person  statement is given
         pursuant to this Article ELEVENTH.

                (3) The number of shares of the  Corporation  owned (directly or
         indirectly) by the acquiring person and each other member of the group.

                (4) The range of voting  power  under  which the  control  share
         acquisition falls or would, if consummated, fall.

                (5) If the control share acquisition has not taken place:

                    (a) a description  in reasonable  detail of the terms of the
                    proposed control share acquisition; and

                    (b) representations of the acquiring person, together with a
                    statement in reasonable  detail of the facts upon which they
                    are based, that the proposed control share  acquisition,  if
                    consummated,  will  not be  contrary  to law  and  that  the
                    acquiring  person  has  the  financial  capacity  to make to
                    proposed control share acquisition.


                E.       Special Meeting of Stockholders.

                    1.  If the  acquiring  person  so  requests  at the  time of
delivery of an acquiring  person  statement and gives an  undertaking to pay the
Corporation's  expenses of a special  meeting,  within ten (10) days thereafter,
the  directors  of  the  Corporation   shall  call  a  special  meeting  of  the
stockholders of the Corporation for the purpose of considering the voting rights
to be  accorded to the shares  acquired  or to be acquired in the control  share
acquisition.

                    2. Unless the acquiring  person agrees in writing to another
date, the special  meeting of the  stockholders  shall be held within fifty (50)
days after the receipt by the Corporation of the request.

                    3. If no request is made,  the voting  rights to be accorded
the shares acquired in the control share

                                       9


<PAGE>

acquisition  shall be  presented  at the  next  special  or  annual  meeting  of
stockholders.

                    4. If the  acquiring  person so  requests  in writing at the
time of the delivery of the acquiring person statement, the special meeting must
not be held sooner than thirty (30) days after the receipt by the Corporation of
the acquiring person's statement.

                F.  Notice.
                    ------

                    1. If a special meeting is requested,  notice of the special
meeting of stockholders shall be given as promptly as reasonably  practicable by
the Corporation to all  stockholders of record as of the record date set for the
meeting, whether or not entitled to vote at the meeting.

                    2.  Notice of the special or annual  stockholder  meeting at
which the voting rights are to be considered  must include or be  accompanied by
both of the following:

                                  (1) a copy of the acquiring  person  statement
                        delivered  to the  Corporation  pursuant to this Article
                        ELEVENTH.

                                  (2) A statement by the Board of the  Directors
                        of the Corporation,  authorized by its directors, of its
                        position  or  recommendation,  or that it is  taking  no
                        position or making no  recommendation,  with  respect to
                        the proposed control share acquisition.


                G.  Voting Rights.
                    -------------

                    1. Control  shares  acquired in a control share  acquisition
have the same voting rights as were accorded the shares before the control share
acquisition  only  to  the  extent  granted  by  resolutions   approved  by  the
stockholders of the Corporation.

                    2. To be adopted under this section,  the resolutions  shall
be  approved by a majority of all the votes which could be cast in a vote on the
election  of  directors  by all the  outstanding  shares  other than  interested
shares.  Interested  shares shall not be entitled to vote on the matter,  and in
determining whether a quorum exists, all interested shares shall be disregarded.
For the purpose of this subsection,  the interested share shall be determined as
of the record  date for  determining  the  stockholders  entitled to vote at the
meeting.

                H.  Redemption.
                    ----------

                                       10

<PAGE>

                    1. Control  shares  acquired in a control share  acquisition
with  respect to which no  acquiring  person  statement  has been filed with the
Corporation  may, at any time during the period ending sixty (60) days after the
last  acquisition  of  control  shares by the  acquiring  person,  be subject to
redemption by the  Corporation at the redemption  price specified in paragraph 3
of this subsection.

                    2. Control  shares  acquired in a control share  acquisition
are not subject to redemption after an acquiring person statement has been filed
unless the shares are not accorded  full voting  rights by the  stockholders  as
provided above.

                    3. The redemption price for shares to be redeemed under this
section  shall be the number of such  shares  multiplied  by the  dollar  amount
(rounded to the nearest  cent) equal to the average per share  price,  including
any brokerage commissions,  transfer taxes and soliciting dealer's fees, paid by
the acquiring person for such shares.  The Corporation may rely  conclusively on
public  announcements by, or filings with the Securities and Exchange Commission
by, the acquiring person as to the prices so paid.

                I.  Dissenters Rights.
                    -----------------

                    1. In the event control  shares  acquired in a control share
acquisition  are  accorded  full  voting  rights  and the  acquiring  person has
acquired  control  shares  with a  majority  or more of all  voting  power,  all
shareholders of the Corporation, other than the acquiring person, have the right
to dissent from the granting of voting rights and to demand  payment of the fair
value of their shares under Section 262 of the Delaware General  Corporation Law
as though such  granting of voting rights were a corporate  action  described in
paragraph (b) of Section 262,  except that the  provisions of subsection  (1) of
paragraph (b) of Section 262 shall not be applicable.

                    2. For purposes of this section "fair value" of shares under
Section 262 of the Delaware  General  Corporation  Law shall in no event be less
than the  highest  price per share paid in the  control  share  acquisition,  as
adjusted for any subsequent  stock  dividends or reverse stock splits or similar
changes.

                TWELFTH:  Certain Business Combinations

                A.  Vote Required for Certain Business Combinations.
                    -----------------------------------------------

                    1.  Higher  Vote  for  Certain  Business  Combinations.   In
                        addition to any affirmative vote required by law or this
                        Certificate  of  Incorporation,  and except as otherwise

                                       11
  

<PAGE>

                        expressly  provided  in  subsection  B of  this  Article
                        TWELFTH:

                                  (a)      any  merger or  consolidation  of the
                                           Corporation  or  any  Subsidiary  (as
                                           hereinafter  defined)  with  (i)  any
                                           Interested       Stockholder      (as
                                           hereinafter   defined)  or  (ii)  any
                                           other  corporation  (whether  or  not
                                           itself  an  Interested   Stockholder)
                                           which  is,  or after  such  merger or
                                           consolidation  would be, an Affiliate
                                           (as   hereinafter   defined)   of  an
                                           Interested Stockholder; or

                                  (b)      any sale, lease, exchange,  mortgage,
                                           pledge, transfer or other disposition
                                           (in one  transaction  or a series  of
                                           transactions)    to   or   with   any
                                           Interested    Stockholder    or   any
                                           Affiliate    of    any     Interested
                                           Stockholder  of  any  assets  of  the
                                           Corporation or any Subsidiary  having
                                           an  aggregate  Fair Market  Value (as
                                           hereinafter defined) of $1,000,000 or
                                           more, or

                                  (c)      the   issuance  or  transfer  by  the
                                           Corporation or any Subsidiary (in one
                                           transaction    or   a    series    of
                                           transactions)  of any  securities  of
                                           the  Corporation or any Subsidiary to
                                           any  Interested  Stockholder  or  any
                                           Affiliate    of    any     Interested
                                           Stockholder  in  exchange  for  cash,
                                           securities  or other  property  (or a
                                           combination    thereof)   having   an
                                           aggregate   Fair   Market   Value  of
                                           $1,000,000 or more; or

                                  (d)      the  adoption of any plan or proposal
                                           for the liquidation or dissolution of
                                           the  Corporation  proposed  by  or on
                                           behalf of an  Interested  Stockholder
                                           or any  Affiliate  of any  Interested
                                           Stockholder; or

                                  (e)      any  reclassification  of  securities
                                           (including  any reverse stock split),
                                           or     recapitalization     of    the
                                           Corporation,   or   any   merger   or
                                           consolidation of the Corporation with
                                           any of its  Subsidiaries or any other
                                           transaction  (whether  or not with or
                                           into  or   otherwise   involving   an
                                           Interested Stockholder) which has the
                                           effect,  directly or  indirectly,  of
                                           increasing the proportionate share of
                                           the  outstanding  shares of any class
                                           of equity or  convertible  securities
                                           of the  Corporation or any Subsidiary
                                           which is directly or 


                                       12

<PAGE>

                                           indirectly  owned  by any  Interested
                                           Stockholder  or any  Affiliate of any
                                           Interested Stockholder;

                                  shall require the affirmative  vote of (A) the
                                  holders of at least a  majority  of the voting
                                  power  of  the  then  outstanding   shares  of
                                  capital stock of the  Corporation  entitled to
                                  vote  generally  in the  election of directors
                                  (the  "Voting  Stock"),  voting  together as a
                                  single class and (B) the holders of at least a
                                  majority of the Voting Stock,  voting together
                                  as a single  class,  excluding for purposes of
                                  calculating  both the affirmative vote and the
                                  number of  outstanding  shares of Voting Stock
                                  all  shares  of  Voting  Stock  of  which  the
                                  beneficial owner is an Interested  Stockholder
                                  or any Affiliate of an Interested  Stockholder
                                  referred to in clauses (a) through (e) in this
                                  paragraph  1. Such  affirmative  vote shall be
                                  required notwithstanding the fact that no vote
                                  may be required,  or that a lesser  percentage
                                  may be specified, by law.

                 2.   "Definition of "Business Combination."  The term "Business
                                  Combination"  as used in this Article  TWELFTH
                                  shall mean any  transaction  which is referred
                                  to in any one or more of clauses  (a)  through
                                  (e) of paragraph 1 of this subsection A.

                B.       When Higher Vote is Not  Required.  The  provisions  of
                         subsection  A of  this  Article  TWELFTH  shall  not be
                         applicable to any particular Business Combination,  and
                         such  Business  Combination  shall  require  only  such
                         affirmative  vote as is  required  by law and any other
                         provision of this Certificate of Incorporation,  if all
                         of the conditions  specified in either of the following
                         paragraphs 1 and 2 are met:

                 1.   Approval by Continuing Directors. The Business Combination
                         shall  have  been   approved   by  a  majority  of  the
                         Continuing Directors (as hereinafter defined).

                 2.   Price and Procedure Requirements.   All  of  the following
                         conditions shall have been met:

                                  (a)      The aggregate  amount of the cash and
                                           the Fair Market Value (as hereinafter
                                           defined)   as  of  the  date  of  the
                                           consummation    of    the    Business
                                           Combination  of  consideration  other
                                           than cash to be received per 

                                       13



<PAGE>

                                           share by holders  of common  stock in
                                           such Business Combination shall be at
                                           least  equal  to the  highest  of the
                                           following:

                                           (i) (if  applicable)  the highest per
                                           share price  (including any brokerage
                                           commissions,   transfer   taxes   and
                                           soliciting dealers' fees) paid by the
                                           Interested Stockholder for any shares
                                           of common  stock  acquired  by it (A)
                                           within    the     two-year     period
                                           immediately prior to the first public
                                           announcement  of the  proposal of the
                                           Business       Combination       (the
                                           "Announcement  Date")  or  (B) in the
                                           transaction  in  which it  became  an
                                           Interested Stockholder,  whichever is
                                           higher; or

                                           (ii) the Fair Market  Value per share
                                           of common  stock on the  Announcement
                                           Date  or on the  date  on  which  the
                                           Interested   Stockholder   became  an
                                           Interested  Stockholder  (such latter
                                           date is referred  to in this  Article
                                           TWELFTH as the "Determination Date"),
                                           whichever is higher.

                                  (b)      The aggregate  amount of the cash and
                                           the Fair Market  Value as of the date
                                           of the  consummation  of the Business
                                           Combination  of  consideration  other
                                           than cash to be received per share by
                                           holders of shares of any other  class
                                           of outstanding  Voting Stock shall be
                                           at least  equal to the highest of the
                                           following (it being intended that the
                                           requirements  of this  paragraph 2(b)
                                           shall  be  required  to be  met  with
                                           respect to every class of outstanding
                                           Voting  Stock,  whether  or  not  the
                                           Interested Stockholder has previously
                                           acquired  any shares of a  particular
                                           class of Voting Stock):

                                           (i) (if  applicable)  the highest per
                                           share price  (including any brokerage
                                           commissions,   transfer   taxes   and
                                           soliciting dealers' fees) paid by the
                                           Interested Stockholder for any shares
                                           of  such   class  of   Voting   Stock
                                           acquired   by  it  (A)   within   the
                                           two-year period  immediately prior to
                                           the  Announcement  Date or (B) in the
                                           transaction  in  which it  became  an
                                           Interested Stockholder,  whichever is
                                           higher;

                                       14

<PAGE>

                                           (ii)  (if   applicable)  the  highest
                                           preferential   amount  per  share  to
                                           which the  holders  of shares of such
                                           class of Voting Stock are entitled in
                                           the   event  of  any   voluntary   or
                                           involuntary liquidation,  dissolution
                                           or winding up of the Corporation; and

                                           (iii) The Fair Market Value per share
                                           of such class of Voting  Stock on the
                                           Announcement    Date    or   on   the
                                           Determination   Date,   whichever  is
                                           higher.

                                  (c)      The  consideration  to be received by
                                           holders  of  a  particular  class  of
                                           Voting Stock (including common stock)
                                           in the Business  Combination shall be
                                           in  cash or in the  same  form as the
                                           Interested Stockholder has previously
                                           paid for shares of such Voting Stock.
                                           If  the  Interested  Stockholder  has
                                           paid  for  shares  of  any  class  of
                                           Voting  Stock with  varying  forms of
                                           consideration,     the     form    of
                                           consideration  for such Voting  Stock
                                           shall be either cash or the form used
                                           to  acquire  the  largest  number  of
                                           shares   of   such    Voting    Stock
                                           previously acquired by it.

                                  (d)      After such Interested Stockholder has
                                           become an Interested  Stockholder and
                                           prior  to the  consummation  of  such
                                           Business Combination: (i) there shall
                                           have  been  (A) no  reduction  in the
                                           annual rate of dividends  paid on the
                                           capital stock (except as necessary to
                                           reflect   any   subdivision   of  the
                                           capital stock), except as approved by
                                           a   majority   of   the    Continuing
                                           Directors,  and  (B) an  increase  in
                                           such  annual  rate  of  dividends  as
                                           necessary      to     reflect     any
                                           reclassification    (including    any
                                           reverse         stock         split),
                                           recapitalization,  reorganization  or
                                           any similar transaction which has the
                                           effect  of  reducing  the  number  of
                                           outstanding  shares of common  stock,
                                           unless  the  failure  so to  increase
                                           such  annual  rate is  approved  by a
                                           majority of the Continuing Directors;
                                           and (ii) such Interested  Stockholder
                                           shall have not become the  beneficial
                                           owner  of any  additional  shares  of
                                           Voting  Stock  except  as part of the
                                           transaction  which  results  in  such
                                           Interested  Stockholder  becoming  an
                                           Interested Stockholder.

                                       15
<PAGE>


                                  (e)      After such Interested Stockholder has
                                           become  an  Interested   Stockholder,
                                           such Interested Stockholder shall not
                                           have  received the benefit,  directly
                                           or indirectly (except proportionately
                                           as  a  stockholder),  of  any  loans,
                                           advances,   guarantees,   pledges  or
                                           other financial assistance or any tax
                                           credits   or  other  tax   advantages
                                           provided by the Corporation,  whether
                                           in  anticipation  of or in connection
                                           with  such  Business  Combination  or
                                           otherwise.

                                  (f)      A  proxy  or  information   statement
                                           describing   the  proposed   Business
                                           Combination  and  complying  with the
                                           requirements    of   the   Securities
                                           Exchange  Act of 1934 (the  "Exchange
                                           Act") and the  rules and  regulations
                                           thereunder    (or   any    subsequent
                                           provisions  replacing such Act, rules
                                           or  regulations)  shall be  mailed to
                                           public     stockholders     of    the
                                           Corporation at least 20 days prior to
                                           the  consummation  of  such  Business
                                           Combination   (whether  or  not  such
                                           proxy  or  information  statement  is
                                           required  to be  mailed  pursuant  to
                                           such Act or subsequent provisions).

                C.       Certain Definitions.   For the purposes of this Article
                         TWELFTH:

                         1.       A "person"  shall mean any  individual,  firm,
                                  corporation or other entity.

                         2.       "Interested Stockholder" shall mean any person
                                  (other than the Corporation or any Subsidiary)
                                  who or which:

                                  (a)      is the beneficial owner,  directly or
                                           indirectly,  of more  than 20% of the
                                           voting   power  of  the   outstanding
                                           Voting Stock; or

                                  (b)      is an  Affiliate  of the  Corporation
                                           and at any time  within the  two-year
                                           period  immediately prior to the date
                                           in question was the beneficial owner,
                                           directly  or  indirectly,  of  20% or
                                           more of the voting  power of the then
                                           outstanding Voting Stock; or

                                  (c)      is an  assignee  of or has  otherwise
                                           succeeded  to any  shares  of  Voting
                                           Stock  which were at any time  within
                                           the two-year period immediately prior
                                           to the 

                                       16

<PAGE>

                                           date in question  beneficially  owned
                                           by  any  Interested  Stockholder,  if
                                           such  assignment or succession  shall
                                           have  occurred  in  the  course  of a
                                           transaction or series of transactions
                                           not   involving  a  public   offering
                                           within the meaning of the  Securities
                                           Act of 1933.

                         3.       A  person shall be a "beneficial owner" of any
                                  Voting Stock:

                                  (a)      which  such  person  or  any  of  its
                                           Affiliates    or    Associates    (as
                                           hereinafter   defined)   beneficially
                                           owns, directly or indirectly; or

                                  (b)      which  such  person  or  any  of  its
                                           Affiliates or Associates  has (i) the
                                           right to acquire  (whether such right
                                           is  exercisable  immediately  or only
                                           after the passage of time),  pursuant
                                           to  any  agreement,   arrangement  or
                                           understanding or upon the exercise of
                                           conversion  rights,  exchange rights,
                                           warrants or options, or otherwise, or
                                           (ii) the  right to vote  pursuant  to
                                           any    agreement,    arrangement   or
                                           understanding; or

                                  (c)      which   are    beneficially    owned,
                                           directly or indirectly,  by any other
                                           person  with which such person or any
                                           of its  Affiliates or Associates  has
                                           any    agreement,    arrangement   or
                                           understanding   for  the  purpose  of
                                           acquiring,    holding,    voting   or
                                           disposing  of any  shares  of  Voting
                                           Stock.

                         4.       For the  purposes  of  determining  whether  a
                                  person is an Interested  Stockholder  pursuant
                                  to  paragraph  2 of  this  subsection  C,  the
                                  number of shares of Voting  Stock deemed to be
                                  outstanding  shall include shares deemed owned
                                  through  application  of  paragraph  3 of this
                                  subsection  C but shall not  include any other
                                  shares of Voting  Stock  which may be issuable
                                  pursuant  to  any  agreement,  arrangement  or
                                  understanding,  or upon exercise of conversion
                                  rights, warrants or options, or otherwise.

                         5.       "Affiliate"  or  "Associate"  shall  have  the
                                  respective  meanings ascribed to such terms in
                                  Rule   l2b-2   of  the   General   Rules   and
                                  Regulations under the Exchange Act.

                                       17

<PAGE>

                         6.       "Subsidiary"  means any corporation of which a
                                  majority  of any class of equity  security  is
                                  owned,   directly   or   indirectly,   by  the
                                  Corporation;  provided,  however, that for the
                                  purposes  of  the   definition  of  Interested
                                  Stockholder  set forth in  paragraph 2 of this
                                  subsection C, the term "Subsidiary" shall mean
                                  only a corporation of which a majority of each
                                  class of equity security is owned, directly or
                                  indirectly, by the Corporation.

                         7.       "Continuing  Director" means any member of the
                                  Board of Directors of the  Corporation  who is
                                  unaffiliated  with the Interested  Stockholder
                                  and was a member of the Board of  Directors of
                                  the  Corporation  prior to the  time  that the
                                  Interested  Stockholder  became an  Interested
                                  Stockholder, and any successor of a Continuing
                                  Director   who  is   unaffiliated   with   the
                                  Interested  Stockholder  and is recommended to
                                  succeed a Continuing Director by a majority of
                                  Continuing  Directors  then  on the  Board  of
                                  Directors of the Corporation.

                         8.       "Fair Market Value" means:

                                  (a)      in the  case of  stock,  the  highest
                                           closing  sale price during the 30-day
                                           period immediately preceding the date
                                           in  question of a share of such stock
                                           on  the   principal   United   States
                                           securities  exchange registered under
                                           the  Exchange Act on which such stock
                                           is  listed,  or, if such stock is not
                                           listed  on  any  such  exchange,  the
                                           highest  closing bid  quotation  with
                                           respect  to a  share  of  such  stock
                                           during  the 30-day  period  preceding
                                           the date in question on the  National
                                           Association  of  Securities  Dealers,
                                           Inc.  Automated  Quotations System or
                                           any system then in use, or if no such
                                           quotations  are  available,  the fair
                                           market  value on the date in question
                                           of  a   share   of  such   stock   as
                                           determined  by the Board of Directors
                                           of the Corporation in good faith; and

                                  (b)      In the case of  property  other  than
                                           cash or stock,  the fair market value
                                           of  such  property  on  the  date  in
                                           question as  determined  by the Board
                                           of  Directors of the  Corporation  in
                                           good faith.

                                       18

<PAGE>

                D.       Powers of the Board of  Directors.  A  majority  of the
                         directors of the  Corporation  shall have the power and
                         duty to  determine  for the  purposes  of this  Article
                         TWELFTH,  on the  basis  of  information  known to them
                         after  reasonable  inquiry,  (1) whether a person is an
                         Interested  Stockholder,  (2) the  number  of shares of
                         Voting  Stock  beneficially  owned by any  person,  (3)
                         whether  a  person  is an  Affiliate  or  Associate  of
                         another,  and (4)  whether  the  assets  which  are the
                         subject  of  any  Business  Combination  have,  or  the
                         consideration  to  be  received  for  the  issuance  or
                         transfer  of  securities  by  the  Corporation  or  any
                         Subsidiary in any Business Combination has an aggregate
                         Fair Market Value of $1,000,000 or more.

                E.       No  Effect  on  Fiduciary   Obligations  of  Interested
                         Stockholders. Nothing contained in this Article TWELFTH
                         shall  be   construed   to   relieve   any   Interested
                         Stockholder  from any fiduciary  obligation  imposed by
                         law.

                THIRTEENTH:  Indemnification.

                A. Authorization of Indemnification. Each person who was or is a
party or is threatened  to be made a party to or is involved in any  threatened,
pending or  completed  action,  suit or  proceeding,  whether  civil,  criminal,
administrative  or  investigative  and  whether  by  or  in  the  right  of  the
corporation or otherwise (a "proceeding"), by reason of the fact that he or she,
or a person of whom he or she is the legal representative,  is or was a director
or  officer  of the  corporation  or is or was  serving  at the  request  of the
corporation as a director,  officer, employee or agent of another corporation or
of a partnership,  joint venture,  trust or other enterprise,  including service
with respect to an employee  benefit plan, shall be (and shall be deemed to have
a contractual right to be) indemnified and held harmless by the corporation (and
any successor to the  corporation  by merger or otherwise) to the fullest extent
authorized  by, and subject to the  conditions  and (except as provided  herein)
procedures set forth in the Delaware General Corporation Law, as the same exists
or may hereafter be amended (but any such amendment shall not be deemed to limit
or prohibit the rights of  indemnification  hereunder for past acts or omissions
of  any  such  person  insofar  as  such  amendment   limits  or  prohibits  the
indemnification  rights that said law permitted the corporation to provide prior
to such  amendment),  against all expenses,  liabilities  and losses  (including
attorney's fees, judgments,  fines, ERISA taxes or penalties and amounts paid or
to be paid in  settlement)  reasonably  incurred  or  suffered by such person in
connection  therewith;  provided,  however, that the corporation shall indemnify
any such person seeking indemnification in connection with a proceeding (or part
thereof)  initiated  by such  person  (except  for a suit or action  pursuant to
subsection B only if such  proceeding  (or part  thereof) was  authorized by the
board of directors of the corporation. 

                                       19

<PAGE>

Persons who are not  directors or officers of the  corporation  may be similarly
indemnified  in respect of such service to the extent  authorized at any time by
the board of directors of the corporation. The indemnification conferred in this
subsection  A also shall  include the right to be paid by the  corporation  (and
such successor) the expenses (including attorney's fees) incurred in the defense
of or  other  involvement  in any  such  proceeding  in  advance  of  its  final
disposition  (including in the case of a director or former director expenses of
separate legal counsel,  up to a maximum of $50,000,  but only in the event that
the director or former director as the indemnified party reasonably  determines,
assuming  an outcome  unfavorable  to such  indemnified  party,  that there is a
reasonable  probability that such proceeding may materially and adversely affect
such  indemnified  party, or that there may be legal defenses  available to such
indemnified  party that are different from or in addition to those  available to
the  corporation);  provided,  however,  that, if and to the extent the Delaware
General  Corporation  Law  requires,  the  payment of such  expenses  (including
attorney's  fees)  incurred  by a  director  or  officer in advance of the final
disposition of a proceeding  shall be made only upon delivery to the corporation
of an  undertaking  by or on behalf of such  director  or  officer  to repay all
amounts  so paid in  advance  if it shall  ultimately  be  determined  that such
director or officer is not entitled to be indemnified under this subsection A or
otherwise; and provided further, that, such expenses incurred by other employees
and agents may be so paid in advance upon such terms and conditions,  if any, as
the board of directors deems appropriate.

                B. Right of Claimant to Bring Action against the Corporation. If
a  claim  under  subsection  A of  this  section  is not  paid  in  full  by the
corporation  within  sixty days after a written  claim has been  received by the
corporation, the claimant may at any time thereafter bring an action against the
corporation  to recover  the unpaid  amount of the claim and, if  successful  in
whole or in part, the claimant shall be entitled to be paid also the expenses of
prosecuting such action. It shall be a defense to any such action (other than an
action brought to enforce a claim for expenses  incurred in connection  with any
proceeding in advance of its final disposition  where the required  undertaking,
if any is required,  has been tendered to the corporation) that the claimant has
not met the  standards of conduct which make it  permissible  under the Delaware
General  Corporation  Law for the  corporation to indemnify the claimant for the
amount claimed or is otherwise not entitled to indemnification  under subsection
A of this  section  but the  burden  of  proving  such  defense  shall be on the
corporation.  The failure of the  corporation  (in the manner provided under the
Delaware General Corporation Law) to have made a determination prior to or after
the commencement of such action that  indemnification  of the claimant is proper
in the  circumstances  because  he or she  has met the  applicable  standard  of
conduct set forth in the Delaware General Corporation Law shall not be a defense
to the  action  or  create  a  presumption  that  the  claimant  has not met the
applicable standard of conduct.  An actual  determination by the corporation (in
the  manner  provided  under the  Delaware  

                                       20

<PAGE>

General Corporation Law) after the commencement of such action that the claimant
has not met such  applicable  standard of conduct  shall not be a defense to the
action,  but  shall  create  a  presumption  that the  claimant  has not met the
applicable standard of conduct.

                C.  Non-exclusivity.  The rights to indemnification  and advance
payment of expenses provided by subsection A of this section shall not be deemed
exclusive of any other rights to which those seeking indemnification and advance
payment  of  expenses  may be  entitled  under  any  bylaw,  agreement,  vote of
stockholders or disinterested  directors or otherwise,  both as to action in his
or her official capacity and as to action in another capacity while holding such
office.

                D. Survival of Indemnification.  The indemnification and advance
payment of expenses  and rights  thereto  provided  by, or granted  pursuant to,
subsection A of this section shall, unless otherwise provided when authorized or
ratified,  continue  as to a person  who has ceased to be a  director,  officer,
employee   or  agent  and  shall   inure  to  the   benefit   of  the   personal
representatives, heirs, executors and administrators of such person.

                E. Insurance.  The corporation  shall have power to purchase and
maintain  insurance  on behalf of any person who is or was a director,  officer,
employee or agent of the corporation, or is or was serving at the request of the
corporation as a director,  officer, employee or agent of another corporation or
of a  partnership,  joint  venture,  trust  or  other  enterprise,  against  any
liability  asserted  against  such person or incurred by such person in any such
capacity,  or arising out of such person's status as such, and related expenses,
whether or not the  corporation  would have the power to  indemnify  such person
against such liability under the provisions of the Delaware General  Corporation
Law.

                                       21

<PAGE>



                FOURTEENTH: Any actions required or permitted to be taken by the
stockholders must be effected at a duly called annual or special meeting of such
stockholders  and  may  not be  effected  by any  consent  in  writing  by  such
stockholders.


                           IN  WITNESS  WHEREOF,  the  undersigned,   being  the
Incorporator  hereinabove  named,  for the  purpose  of  forming  a  corporation
pursuant to the Delaware  General  Corporation  Law,  hereby  certifies that the
facts  hereinabove  stated are truly set forth,  and  accordingly  executes this
Certificate of Incorporation this 26th day of June, 1996.




                                             Incorporator


                                             By:
                                                --------------------------------








                                       22



                                     
                                     BYLAWS

                                       OF

                           ORION NEWCO SERVICES, INC.


1.      Offices.
        -------
                1.1 Registered  Office. The registered office of the corporation
shall be in the City of Wilmington, County of New Castle, State of Delaware, and
the registered  agent in charge thereof shall be The Corporation  Trust Company,
Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801.

                1.2 Other Offices. The corporation may also have offices at such
other  places,  both within and without the State of  Delaware,  as the board of
directors may from time to time determine or the business of the corporation may
require.

2.  Meetings of Stockholders.

                2.1 Place of Meetings.  All meetings of the stockholders for the
election  of  directors  shall be held in the City of  Washington,  District  of
Columbia,  at such  place  as may be  fixed  from  time to time by the  board of
directors,  or at such other place, within or without the State of Delaware,  as
shall be  designated  from time to time by the board of directors  and stated in
the  notice of the  meeting  or in a duly  executed  waiver  of notice  thereof.
Meetings  of  stockholders  for any other  purpose  may be held at such time and
place, within or without the State of Delaware, as shall be stated in the notice
of the meeting or in a duly executed waiver of notice thereof.

                2.2 Annual Meetings. Annual meetings of stockholders, commencing
with the year 1997,  shall be held on the first  Thursday of May, if not a legal
holiday,  and if a legal  holiday,  then on the next secular day  following,  at
10:00 

<PAGE>

a.m., or at such other date and time as shall be  designated  from time to
time by the board of  directors  and stated in the notice of the meeting or in a
duly executed  waiver of notice  thereof,  at which  stockholders  shall elect a
board of directors and transact  such other  business as may properly be brought
before the meeting.

                2.3 Special Meetings. Special meetings of the stockholders,  for
any  purpose  or  purposes,  unless  otherwise  prescribed  by statute or by the
certificate of incorporation,  may be called by the board of directors or by the
president,  and shall be called by the  president or secretary at the request in
writing of two or more stockholders  owning at least 35% in amount of the entire
capital stock of the corporation  issued and outstanding and entitled to vote if
no special  meeting of  stockholders  has been called and held at the request of
stockholders within the six months preceding such written request.  Such request
shall include a statement of the purpose or purposes of the proposed meeting.

                2.4 Notice of Meetings.  Written  notice of the annual  meeting,
stating  the  place,  date  and  hour of the  meeting,  shall  be  given to each
stockholder  entitled  to vote at such  meeting  not less than ten nor more than
sixty days before the date of the meeting.  Written notice of a special  meeting
of stockholders, stating the place, date and hour of the meeting and the purpose
or purposes for which the meeting is called,  shall be given to each stockholder
entitled  to vote at such  meeting  not less than ten nor more than  sixty  days
before the date of the meeting.

                2.5 Business at Special  Meetings.  Business  transacted  at any
special meeting of  stockholders  shall be limited to the purposes stated in the
notice. 

                2.6 List of  Stockholders.  The  officer  who has  charge of the
stock ledger of the corporation shall prepare and make, at least ten days before
every meeting of stockholders,  a complete list of the stockholders  entitled to
vote at the meeting,  arranged in alphabetical  order and showing the address of
each  stockholder  and the  number  of  shares  registered  in the  name of each
stockholder.  

                                      -2-

<PAGE>

Such list shall be open to the examination of any  stockholder,  for any purpose
germane to the meeting, during ordinary business hours, for a period of at least
ten days  prior to the  meeting,  either at a place  within  the city  where the
meeting  is to be held,  which  place  shall be  specified  in the notice of the
meeting, or, if not so specified,  at the place where the meeting is to be held.
The list shall also be  produced  and kept at the time and place of the  meeting
during the whole time thereof,  and may be inspected by any  stockholder  who is
present.  The  stock  ledger  shall  be the  only  evidence  as to who  are  the
stockholders  entitled to examine the stock  ledger,  the list  required by this
section or the books of the corporation, or to vote in person or by proxy at any
meeting of stockholders.

                2.7 Quorum at Meetings.  Except as otherwise provided by statute
or by the certificate of  incorporation,  the holders of a majority of the stock
issued  and  outstanding  and  entitled  to vote  thereat,  present in person or
represented  by  proxy,  shall  constitute  a  quorum  at  all  meetings  of the
stockholders for the transaction of business. If, however, such quorum shall not
be  present  or  represented  at  any  such  meeting  of the  stockholders,  the
stockholders  entitled  to vote  thereat,  present in person or  represented  by
proxy, shall have power to adjourn the meeting from time to time to another time
and place,  without notice other than  announcement at the meeting of such other
time and place.  At the adjourned  meeting at which a quorum shall be present or
represented,  any business may be transacted which might have been transacted at
the original  meeting.  If the  adjournment  is for more than thirty days, or if
after the  adjournment a new record date is fixed for the adjourned  meeting,  a
notice of the  adjourned  meeting shall be given to each  stockholder  of record
entitled to vote at the meeting.

                2.8  Voting  and  Proxies.  Unless  otherwise  provided  in  the
certificate  of  incorporation,  and subject to the provisions of Section 6.4 of
these Bylaws,  each 

                                      -3-

<PAGE>

stockholder shall be entitled to one vote on each matter, in person or by proxy,
for each share of the  corporation's  capital stock having voting power which is
held by such  stockholder.  No proxy  shall be voted or acted upon  after  three
years  from its date,  unless the proxy  provides  for a longer  period.  A duly
executed proxy shall be irrevocable if it states that it is irrevocable  and if,
and only as long as, it is coupled with an interest sufficient in law to support
an irrevocable power. A proxy may be made irrevocable  regardless of whether the
interest  with  which it is  coupled is an  interest  in the stock  itself or an
interest in the corporation generally.

                2.9  Required  Vote.  When a quorum is present at any meeting of
stockholders,  all matters shall be determined, adopted and approved by the vote
(which need not be by ballot) of the  holders of a majority of the stock  having
voting power,  present in person or  represented  by proxy,  unless the proposed
action is one upon which, by express provision of statutes or of the certificate
of incorporation, a different vote is specified and required, in which case such
express  provision  shall  govern and  control the  decision  of such  question.
Notwithstanding  the foregoing,  candidates for election as members of the board
of  directors  who  receive  the  highest  number of votes,  up to the number of
directors to be chosen,  shall stand  elected,  and an absolute  majority of the
votes cast shall not be a  prerequisite  to the election of any candidate to the
board of directors.

                2.10.  Stockholder  Actions. Any action required or permitted to
be taken by the stockholders must be effected at a duly called annual or special
meeting of such  stockholders  and may not be effected by any consent in writing
by such stockholders.

                2.11.  Nominating  Committee.  Only persons who are nominated in
accordance  with the procedures set forth in this Section 2.11 shall be eligible
for election as directors.  Nominations  of persons for election to the Board of
Directors of the  corporation  may be made at a meeting of stockholders by or at
the direction 

                                      -4-

<PAGE>

of the Board of Directors or by any stockholder of the  corporation  entitled to
vote for the election of  directors at the meeting who complies  with the notice
procedures set forth in this Section 2.11.  Such  nominations,  other than those
made by or at the direction of the Board of Directors, shall be made pursuant to
timely notice in writing to the Secretary of the  Corporation.  To be timely,  a
stockholder's  notice  shall be  delivered  to or  mailed  and  received  at the
principal  executive  offices of the  corporation not less than 50 days nor more
than 90 days prior to the  meeting;  provided,  however,  that in the event that
less than 60 days' notice or prior public  disclosure of the date of the meeting
is given or made to stockholders, notice by the stockholder to be timely must be
so received not later than the close of business on the 10th day  following  the
day on which such  notice of the date of the  meeting  was mailed or such public
disclosure was made.  Such  stockholder's  notice shall set forth (a) as to each
person whom the stockholder  proposes to nominate for election or re-election as
a director,  (i) the name, age,  business address and residence  address of such
person,  (ii) the principal  occupation or employment of such person,  (iii) the
class and number of shares of the corporation  which are  beneficially  owned by
such  person,  and (iv) any other  information  relating  to such person that is
required to be disclosed in  solicitations of proxies for election of directors,
or is otherwise  required,  in each case  pursuant to  Regulation  14A under the
Securities  Exchange Act of 1934, as amended  (including without limitation such
person's  written consent to being named in the proxy statement as a nominee and
to serving as a director if elected);  and (b) as to the stockholder  giving the
notice (i) the name and address,  as they appear on the corporation's  books, of
such  stockholder  and (ii) the  class and  number of shares of the  corporation
which are beneficially owned by such stockholder. At the request of the Board of
Directors,  any person  nominated  by the Board of  Directors  for election as a
director  shall furnish to the  Secretary of the  Corporation  that  information
required to be set 

                                      -5-

<PAGE>

forth in a stockholder's  notice of nomination which pertains to the nominee. No
later  than the  tenth  day  following  the  date of  receipt  of a  stockholder
nomination  submitted  pursuant  to this  Section  2.11,  the  president  of the
corporation  shall,  if the facts  warrant,  determine and notify in writing the
stockholder  making  such  nomination  that  such  nomination  was  not  made in
accordance  with the time  limits  and/or  other  procedures  prescribed  by the
Bylaws.  If no such  notification  is mailed  to such  stockholder  within  such
ten-day period,  such nomination shall be deemed to have been made in accordance
with the  provisions  of this  Section  2.11.  No person  shall be eligible  for
election as a director of the  corporation  unless  nominated in accordance with
the procedures set forth in this Section 2.11.

                2.12.  Business at Annual  Meeting.  At an annual meeting of the
stockholders,  only such business shall be conducted as shall have been properly
brought before the meeting.  To be properly  brought  before an annual  meeting,
business  must be (a)  specified  in the  notice of meeting  (or any  supplement
thereto)  given by or at the direction of the Board of Directors,  (b) otherwise
properly  brought  before  the  meeting by or at the  direction  of the Board of
Directors,   or  (c)  otherwise   properly  brought  before  the  meeting  by  a
stockholder.  For business to be properly  brought before an annual meeting by a
stockholder, the stockholder must have given timely notice thereof in writing to
the Secretary of the Corporation.  To be timely, a stockholder's  notice must be
delivered to or mailed and received at the  principal  executive  offices of the
corporation  not less than 50 days nor more than 90 days  prior to the  meeting;
provided,  however,  that in the event  that less than 60 days'  notice or prior
public  disclosure of the date of the meeting is given or made to  stockholders,
notice by the  stockholder  to be timely must be so received  not later than the
close of business on the 10th day  following the day on which such notice of the
date of the annual  meeting was mailed or such  public  disclosure  was made.  A
stockholder's  notice to the  Secretary  shall set forth 

                                      -6-

<PAGE>

as to each matter the  stockholder  proposes to bring before the annual  meeting
(a) a brief  description of the business desired to be brought before the annual
meeting and the reasons for conducting such business at the annual meeting,  (b)
the  name  and  address,  as they  appear  on the  corporation's  books,  of the
stockholder  proposing such business,  (c) the class and number of shares of the
corporation  which  are  beneficially  owned  by the  stockholder,  and  (d) any
material  interest of the stockholder in such business.  No later than the tenth
day  following  the date of receipt of a  shareholder  notice  pursuant  to this
Section 2.12,  the president of the  corporation  shall,  if the facts  warrant,
determine and notify in writing the stockholder submitting such notice that such
notice was not made in accordance  with the time limits and/or other  procedures
prescribed by the Bylaws.  If no such notification is mailed to such shareholder
within such  ten-day  period,  such  stockholder  notice  containing a matter of
business shall be deemed to have been made in accordance  with the provisions of
this Section 2.12.  Notwithstanding anything in these Bylaws to the contrary, no
business shall be conducted at an annual  meeting except in accordance  with the
procedures set forth in this Section 2.12.

3.      Directors.
        ---------
                3.1 Powers. The business and affairs of the corporation shall be
managed by or under the direction of the board of directors,  which may exercise
all such powers of the corporation and do all such lawful acts and things as are
not by  statute  or by the  certificate  of  incorporation  or by  these  Bylaws
directed or required to be exercised or done by the stockholders.

                3.2.  Number and Election.  The number of directors  which shall
constitute  the whole  board shall be eleven  members and shall be divided  into
three  

                                      -7-

<PAGE>

classes as specified or determined  pursuant to the Certificate of Incorporation
of the corporation as in effect from time to time.

                3.3.  Vacancies.   Vacancies  and  newly  created  directorships
resulting  from any  increase in the  authorized  number of  directors  shall be
filled in the  manner  specified  in the  Certificate  of  Incorporation  of the
corporation as in effect from time to time.

                3.4 Place of Meetings. The board of directors of the corporation
may hold meetings,  both regular and special, either within or without the State
of Delaware.

                3.5 First Meeting of Each Board. The first meeting of each newly
elected  board of  directors  shall be held at such  time and  place as shall be
specified in a notice given as hereinafter  provided for special meetings of the
board of  directors,  or as shall be  specified  in a  written  waiver of notice
signed by all of the directors.

                3.6 Regular Meetings. Regular meetings of the board of directors
may be held without  notice at such time and at such place as shall from time to
time be determined by the board of directors.

                3.7  Special  Meetings.  Special  meetings  of the  board may be
called by the president on one day's notice to each director,  either personally
or by telephone, by mail or by telegram; special meetings shall be called by the
chairman or secretary  in like manner and on like notice on the written  request
of one-third of the total number of directors.

                3.8 Quorum and Vote at  Meetings.  At all meetings of the board,
one director if a board of one director is authorized, or such greater number of
directors as is not less than a majority of the total number of directors, shall
constitute a quorum for the  transaction of business.  The vote of a majority of
the directors present at any meeting at which there is a quorum shall be the act
of the board of 

                                      -8-

<PAGE>

directors, except as may be otherwise specifically provided by statute or by the
certificate of incorporation. If a quorum shall not be present at any meeting of
the board of directors, the directors present thereat may adjourn the meeting to
another time and place, without notice other than announcement at the meeting of
such other time and place.

                3.9 Telephone Meetings. Members of the board of directors or any
committee  designated by the board may participate in a meeting of such board or
committee by means of conference telephone or similar  communications  equipment
by means of which all persons  participating in the meeting can hear each other,
and  participation  in a  meeting  pursuant  to this  section  shall  constitute
presence in person at such meeting.

                3.10 Action Without Meeting.  Unless otherwise restricted by the
certificate of incorporation  or these Bylaws,  any action required or permitted
to be taken at any meeting of the board of directors or of any committee thereof
may be taken without a meeting, if all members of the board or committee, as the
case may be, consent  thereto in writing,  and the writing or writings are filed
with the minutes of proceedings of the board of directors or committee.

                3.11  Committees  of  Directors.  The board of directors  may by
resolution  passed by a  majority  of the  whole  board,  designate  one or more
committees,  each  committee  to consist of one or more of the  directors of the
corporation.  The board may designate one or more directors as alternate members
of any  committee,  who may  replace  any absent or  disqualified  member at any
meeting of the  committee.  If a member of a committee  shall be absent from any
meeting,  or disqualified  from voting thereat,  the remaining member or members
present and not disqualified from voting,  whether or not such member or members
constitute a quorum, may, by unanimous vote, appoint another member of the board
of directors  to act at the meeting in the place of such absent or  disqualified

                                      -9-

<PAGE>

member.  Any such  committee,  to the extent  provided in the  resolution of the
board of directors,  shall have and may exercise all the powers and authority of
the board of  directors  in the  management  of the  business and affairs of the
corporation,  and may authorize the seal of the corporation to be affixed to all
papers  which may  require  it;  but no such  committee  shall have the power or
authority in reference to amending the certificate of incorporation (except that
a committee  may, to the extent  authorized  in the  resolution  or  resolutions
providing  for the issuance of shares of stock adopted by the board of directors
pursuant  to  Section  151(a)  of the  General  Corporation  Law of the State of
Delaware  (hereinafter the "GCL"),  fix any of the preferences or rights of such
shares  relating to dividends,  redemption,  dissolution,  any  distribution  of
assets of the corporation or the conversion into, or the exchange of such shares
for, shares of any other class or classes or any other series of the same or any
other class or classes of stock of the  corporation),  adopting an  agreement of
merger or consolidation pursuant to Sections 251 or 252 of the GCL, recommending
to the stockholders  the sale, lease or exchange of all or substantially  all of
the  corporation's  property  and assets,  recommending  to the  stockholders  a
dissolution of the corporation or a revocation of a dissolution, or amending the
Bylaws of the  corporation;  and,  unless  otherwise  expressly  provided in the
resolution,  no such  committee  shall have the power or  authority to declare a
dividend,  to authorize  the  issuance of stock,  or to adopt a  certificate  of
ownership  and merger  pursuant to Section  253 of the GCL.  Such  committee  or
committees  shall have such name or names as may be determined from time to time
by resolution adopted by the board of directors.  Unless otherwise  specified in
the  resolution  of the board of directors  designating  the  committee,  at all
meetings of each such committee of directors,  a majority of the total number of
members  of the  committee  shall  constitute  a quorum for the  transaction  of
business,  and the vote of a majority of the members of the 

                                      -10-

<PAGE>

committee  present at any meeting at which there is a quorum shall be the act of
the  committee.  Each committee  shall keep regular  minutes of its meetings and
report the same to the board of directors, when required.

                3.12 Compensation of Directors.  Unless otherwise  restricted by
the  certificate  of  incorporation,  the  board  of  directors  shall  have the
authority to fix the compensation of directors.  The directors may be paid their
expenses,  if any, of  attendance  at each meeting of the board of directors and
may be paid a fixed sum for attendance at each meeting of the board of directors
or a stated salary as director. No such payment shall preclude any director from
serving  the  corporation  in any  other  capacity  and  receiving  compensation
therefor.   Members  of  special  or  standing   committees  may  be  paid  like
compensation for attending committee meetings.

4.      Notices of Meetings.
        -------------------

                4.1 Notice Procedure.  Whenever, whether under the provisions of
any statute or of the certificate of incorporation or of these Bylaws, notice is
required to be given to any director or stockholder,  such requirement shall not
be construed to require the giving of personal notice.  Such notice may be given
in writing, by mail,  addressed to such director or stockholder,  at his address
as it appears on the records of the  corporation,  with postage thereon prepaid,
and such  notice  shall  be  deemed  to be  given  at the time  when the same is
deposited in the United  States mail.  Notice to directors  may also be given by
telex, telegram or telephone.

                4.2  Waivers  of  Notice.  Whenever  the giving of any notice is
required by statute,  the certificate of incorporation or these Bylaws, a waiver
thereof,  in writing,  signed by the person or persons  entitled to said notice,
whether before or after the event as to which such notice is required,  shall be
deemed  equivalent  to  

                                      -11-

<PAGE>

notice.  Attendance of a person at a meeting shall constitute a waiver of notice
of such  meeting,  except  when the  person  attends a meeting  for the  express
purpose of objecting, at the beginning of the meeting, to the transaction of any
business  because the meeting is not lawfully  called or  convened.  Neither the
business to be transacted at, nor the purpose of, any regular or special meeting
of the  stockholders,  directors or members of a committee of directors  need be
specified in any written waiver of notice, unless so required by the certificate
of incorporation, by statute or by these Bylaws.

5.      Officers.
        --------

                5.1  Positions.  The  officers  of the  corporation  shall  be a
president and a secretary, and such other officers as the board of directors may
appoint,  including  one  or  more  vice  presidents,  a  treasurer,   assistant
secretaries and assistant treasurers, who shall exercise such powers and perform
such duties as shall be determined from time to time by the board. Any number of
offices may be held by the same person,  unless the certificate of incorporation
or these Bylaws otherwise provide; provided, however, that in no event shall the
president and the secretary be the same person.

                5.2 Appointment. The officers of the corporation shall be chosen
by the board of  directors  at its first  meeting  after each annual  meeting of
stockholders.

                5.3  Compensation.  The  compensation  of  all  officers  of the
corporation shall be fixed by the board of directors.

                5.4 Term of Office.  The officers of the corporation  shall hold
office  until their  successors  are chosen and  qualify or until their  earlier
resignation  or removal.  Any officer may resign at any time upon written notice
to the  corporation.  Any officer elected or appointed by the board of directors
may be 

                                      -12-

<PAGE>

removed  at any  time,  with or  without  cause,  by the  affirmative  vote of a
majority of the board of directors.  Any vacancy  occurring in any office of the
corporation  shall be filled  by the board of  directors.  All  officers  of the
corporation  shall be  required to retire at the end of the month  during  which
they attain 65 years of age.

                5.5 Fidelity  Bonds.  The corporation may secure the fidelity of
any or all of its officers or agents by bond or otherwise.

                5.6 Chairman.  The chairman shall preside at all meetings of the
stockholders  and board of  directors  and  shall be ex  officio a member of all
standing committees of the board of directors.

                5.7  President.  The  president  shall  be the  chief  executive
officer  of the  corporation,  shall  be ex  officio  a member  of all  standing
committees,  shall assume all responsibility for the management and operation of
the  business  of  the  corporation,  and  shall  ensure  that  all  orders  and
resolutions  of the board of directors  are carried into effect.  The  president
shall  have the  authority  to  execute  bonds,  mortgages  and other  contracts
requiring a seal,  under the seal of the  corporation,  except where required or
permitted  by law to be  otherwise  signed and  executed  and  except  where the
signing and  execution  thereof  shall be  expressly  delegated  by the board of
directors to some officer or agent of the corporation.

                5.8 Vice Chairman or Vice  Presidents.  If the  directors  shall
appoint one or more vice presidents, such vice chairman or vice presidents shall
perform  such  duties  and  have  such  powers  as may be  vested  in such  vice
presidents  by the  board of  directors  or by the  president.  One of such vice
presidents may be designated the chief operating  officer of the corporation and
have general management of the day-to-day operations of the corporation, subject
to the authority of the president.

                                      -13-

<PAGE>


                5.9  Secretary.  The secretary  shall attend all meetings of the
board of directors  and all meetings of the  stockholders,  and shall record all
the  proceedings  of the  meetings  of the  stockholders  and  of the  board  of
directors in a book to be kept for that  purpose,  and shall perform like duties
for the standing committees,  when required.  The secretary shall give, or cause
to be given,  notice of all meetings of the stockholders and special meetings of
the board of directors, and shall perform such other duties as may be prescribed
by the board of  directors  or by the  president,  under whose  supervision  the
secretary  shall be. The secretary  shall have custody of the corporate  seal of
the  corporation,  and the  secretary,  or an  assistant  secretary,  shall have
authority to affix the same to any instrument  requiring it, and when so affixed
it may be attested by the signature of the secretary or by the signature of such
assistant  secretary.  The board of directors may give general  authority to any
other officer to affix the seal of the corporation and to attest the affixing by
such  officer's  signature.  The  secretary or an assistant  secretary  may also
attest all instruments signed by the president or any vice president.

                5.10 Assistant Secretary.  The assistant secretary,  or if there
be more than one, the assistant secretaries in the order determined by the board
of  directors  (or if there shall have been no such  determination,  then in the
order of their election), shall, in the absence of the secretary or in the event
of the secretary's  inability or refusal to act, perform the duties and exercise
the powers of the  secretary,  and shall perform such other duties and have such
other powers as the board of directors may from time to time prescribe.

                5.11     Treasurer.
                         ---------

                  5.11.1  Duties.  The  treasurer  shall have the custody of the
corporate  funds and  securities  and shall keep full and  accurate  accounts of
receipts and  disbursements  in books  belonging to the  corporation,  and shall
deposit all moneys 

                                      -14-

<PAGE>

and other valuable  effects in the name and to the credit of the  corporation in
such depositories as may be designated by the board of directors.  The treasurer
shall  disburse  the  funds  of the  corporation  as  ordered  by the  board  of
directors,  taking proper vouchers for such  disbursements,  and shall render to
the president,  and to the board of directors at its regular  meetings,  or when
the board of directors so requires,  an account of all transactions as treasurer
and of the financial condition of the corporation.

                  5.11.2  Bond.  If  required  by the  board of  directors,  the
treasurer  shall give the corporation a bond in such sum and with such surety or
sureties as shall be  satisfactory  to the board of  directors  for the faithful
performance of the duties of the  treasurer's  office and for the restoration to
the corporation,  in case of the treasurer's death,  resignation,  retirement or
removal from office, of all books, papers, vouchers, money and other property of
whatever kind, in the treasurer's  possession or under the  treasurer's  control
and belonging to the corporation.

                5.12 Assistant Treasurer.  The assistant treasurer,  or if there
shall be more than one, the assistant  treasurers in the order determined by the
board of directors (or if there shall have been no such  determination,  then in
the order of their  election),  shall, in the absence of the treasurer or in the
event of the  treasurer's  inability  or refusal to act,  perform the duties and
exercise the powers of the  treasurer,  and shall  perform such other duties and
have  such  other  powers  as the  board  of  directors  may  from  time to time
prescribe.

6.      Capital Stock.
        -------------

                6.1 Certificates of Stock;  Uncertificated Shares. The shares of
the corporation shall be represented by certificates, provided that the board of
directors may provide by resolution  or  resolutions  that some or all of any or
all classes or series of the corporation's stock shall be uncertificated shares.
Any such 

                                      -15-

<PAGE>

resolution  shall not apply to shares  represented  by a certificate  until such
certificate is surrendered to the corporation.  Notwithstanding  the adoption of
such a resolution by the board of directors,  every holder of stock  represented
by certificates and upon request every holder of uncertificated  shares shall be
entitled to have a certificate  signed by, or in the name of the  corporation by
the  president  or  vice  president,  and  by  the  treasurer  and/or  assistant
treasurer,  or the  secretary  or an  assistant  secretary  of such  corporation
representing the number of shares registered in certificate form. Any or all the
signatures on the  certificate may be facsimile.  In case any officer,  transfer
agent  or  registrar  whose  signature  or  facsimile  signature  appears  on  a
certificate  shall have ceased to be such officer,  transfer  agent or registrar
before such certificate is issued,  it may be issued by the corporation with the
same effect as if such person were such officer,  transfer agent or registrar at
the date of issue.  

                6.2 Lost  Certificates.  The board of directors may direct a new
certificate or  certificates of stock or  uncertificated  shares to be issued in
place of any certificate or certificates  theretofore  issued by the corporation
and  alleged  to have been  lost,  stolen or  destroyed,  upon the  making of an
affidavit of that fact by the person  claiming that the certificate of stock has
been  lost,  stolen  or  destroyed.  When  authorizing  such  issuance  of a new
certificate or  certificates,  the board of directors may, in its discretion and
as a condition  precedent  to the  issuance  thereof,  require the owner of such
lost,  stolen or destroyed  certificate or  certificates,  or such owner's legal
representative,  to advertise the same in such manner as the board shall require
and/or to give the  corporation a bond, in such sum as the board may direct,  as
indemnity  against any claim that may be made against the corporation on account
of the certificate  alleged to have been lost, stolen or destroyed or on account
of the issuance of such new certificate or uncertificated shares.

                                      -16-

<PAGE>

                6.3  Transfers.  The  transfer  of stock and  certificates  that
represent the stock and the transfer of uncertificated  shares shall be effected
in accordance  with the laws of the State of Delaware.  Any  restriction  on the
transfer of a security imposed by the corporation  shall be noted  conspicuously
on the security.

                6.4  Fixing  Record  Date.  In order  that the  corporation  may
determine the stockholders  entitled to notice of, or to vote at, any meeting of
stockholders  or any  adjournment  thereof,  or to express  consent to corporate
action in  writing  without a meeting,  or  entitled  to receive  payment of any
dividend  or other  distribution  or  allotment  of any  rights,  or entitled to
exercise any rights in respect of any change, conversion or exchange of stock or
for the purpose of any other lawful  action,  the board of directors may fix, in
advance,  a record  date,  which  shall not be more than sixty nor less than ten
days  before  the date of such  meeting,  nor more than  sixty days prior to any
other action.  A determination  of stockholders of record entitled to notice of,
or to vote at, a meeting of  stockholders  shall apply to any adjournment of the
meeting;  provided,  however,  that the board of directors  may fix a new record
date for the adjourned  meeting.  

                6.5 Registered  Stockholders.  The corporation shall be entitled
to recognize  the  exclusive  right of a person  registered  on its books as the
owner of shares to receive dividends, to receive notifications,  to vote as such
owner,  and to  exercise  all  the  rights  and  powers  of an  owner;  and  the
corporation  shall not be bound to recognize  any equitable or other claim to or
interest in such share or shares on the part of any other person, whether or not
it shall have express or other notice thereof,  except as otherwise  provided by
the laws of the State of Delaware.

                                      -17-

<PAGE>

7.      Indemnification.
        ---------------

                Indemnification  of certain persons by the corporation  shall be
as specified in or determined  pursuant to the Certificate of  Incorporation  of
the Corporation as is in effect from time to time.

8.      General Provisions.
        ------------------

                8.1   Dividends.   Dividends  upon  the  capital  stock  of  the
corporation,  subject to the provisions of the certificate of incorporation  and
the laws of the State of Delaware,  may be declared by the board of directors at
any  regular  or  special  meeting.  Subject to the  provisions  of the  General
Corporation Law of the State of Delaware,  such dividends may be paid either out
of surplus,  as defined in the General Corporation Law of the State of Delaware,
or in the event that there shall be no such surplus,  out of the net profits for
the fiscal year in which the dividend is declared  and/or the  preceding  fiscal
year.  Dividends  may  be  paid  in  cash,  in  property,  or in  shares  of the
corporation's  capital  stock,  subject  to  the  provisions,  if  any,  of  the
certificate of incorporation.

                8.2 Reserves.  The directors of the  corporation  may set apart,
out of the funds of the  corporation  available  for  dividends,  a  reserve  or
reserves for any proper purpose and may abolish any such reserve.

                8.3  Execution of  Instruments.  All checks or demands for money
and notes of the corporation shall be signed by such officer or officers or such
other  person  or  persons  as the  board of  directors  may  from  time to time
designate.

                8.4 Fiscal  Year.  The fiscal year of the  corporation  shall be
fixed by resolution of the board of directors.

                8.5 Seal. The corporate  seal shall have  inscribed  thereon the
name of the  corporation,  the year of its organization and the words "Corporate
Seal, 

                                      -18-

<PAGE>

Delaware".  The seal may be used by  causing  it or a  facsimile  thereof  to be
impressed or affixed or otherwise reproduced.

                Section 9. Amendments.  These Bylaws may be altered,  amended or
repealed and new bylaws may be adopted by a majority of the Board of  Directors,
except that Sections 2.3, 2.10,  2.11, 2.12, 3.2, 3.3 and this Section 9 may not
be altered,  amended,  or repealed except by at the affirmative vote of at least
two-thirds the shares  entitled to vote thereon or the  affirmative  vote of the
Board of Directors.

                                     * * * *









                                      -19-


                                                           
                          CERTIFICATE OF DESIGNATIONS,

                             RIGHTS AND PREFERENCES

                                       OF

                        SERIES A 8% CUMULATIVE REDEEMABLE

                           CONVERTIBLE PREFERRED STOCK

                                       OF

                           ORION NEWCO SERVICES, INC.

- --------------------------------------------------------------------------------

                             Pursuant to Section 151
                         of the General Corporation Law
                            of the State of Delaware

- --------------------------------------------------------------------------------



                  The  undersigned  DOES HEREBY  CERTIFY  that,  pursuant to the
authority  contained in Article FOURTH of the  Certificate of  Incorporation  of
Orion Newco Services,  Inc., a Delaware corporation (the "Corporation"),  and in
accordance  with  Section  151 of the  General  Corporation  Law of the State of
Delaware,  the Board of Directors of the Corporation has authorized the creation
of Series A 8%  Cumulative  Redeemable  Convertible  Preferred  Stock having the
designations,  rights and  preferences  as are set forth in Exhibit A hereto and
made a part hereof and that the  following  resolution  was duly  adopted by the
Board of Directors of the Corporation:
                           RESOLVED,  that  a  series  of  authorized  Preferred
         Stock,  par value $.01 per share,  of the Corporation be, and it hereby
         is,  created;  that the shares of such series shall be, and they hereby
         are,  

<PAGE>


         designated as "Series A 8% Cumulative Redeemable  Convertible Preferred
         Stock";  that the number of shares  constituting  such series shall be,
         and it  hereby  is,  15,000;  and that  the  designations,  rights  and
         preferences  of the shares of such series are as set forth in Exhibit A
         attached hereto and made a part hereof.


         IN WITNESS WHEREOF, the Corporation has caused its corporate seal to be
hereunto  affixed and this  Certificate  to be signed by its President and Chief
Executive  Officer and attested to by its Vice  President,  Corporate  and Legal
Affairs, and Secretary this ____ day of __________, 199__.

                                                ORION NEWCO SERVICES, INC.


                                                By:
                                                  ------------------------------
[SEAL]                                          Name:  W. Neil Bauer
                                                Title: President/Chief Executive
                                                        Officer


ATTEST:


- -----------------------------------------
Name:      Richard H. Shay, Esq.
Title:     Vice President, Corporate and
              Legal Affairs/Secretary



                                     - 2 -

<PAGE>
                                                                      EXHIBIT A



                        SERIES A 8% CUMULATIVE REDEEMABLE
                           CONVERTIBLE PREFERRED STOCK
                           ---------------------------


                  The following sections set forth the designations,  rights and
preferences  of the  Corporation's  Series A Preferred.  Capitalized  terms used
herein are defined in Section 12 below.

                  Section 1.        Dividends.
                                    ---------
                  1A.   General   Obligation.   When  and  as  declared  by  the
Corporation's  board of directors and to the extent  permitted under the General
Corporation Law of Delaware, the Corporation shall pay preferential dividends to
the holders of the  Preferred  Stock as  provided  in this  Section 1. Except as
otherwise  provided herein,  dividends on each Preferred Share shall accrue on a
daily  basis at the rate of 8% per  annum  of the sum of the  Liquidation  Value
thereof plus all accumulated and unpaid  dividends  thereon,  from and including
the Date of Issuance of such Preferred  Share to and including the date on which
the  Liquidation  Value of such  Preferred  Share  (plus all  accrued and unpaid
dividends  thereon)  is paid or the  date  on  which  such  Preferred  Share  is
converted into shares of Common Stock  hereunder.  Such  dividends  shall accrue
whether or not they have been  declared  and  whether or not there are  profits,
surplus or other funds of the Corporation  legally  available for the payment of
dividends.

                  1B.  Dividend  Reference  Dates.  To the  extent not paid on a
Dividend Reference Date, with the initial Dividend Reference Date being February
28, 1997, all dividends which have accrued on each Preferred  Share  outstanding
since the latest preceding  Dividend  Reference Date (or the Date of Issuance of
such Preferred  Share, if later) ending upon each such Dividend  Reference Date,
and, in the case of each Preferred  Share  outstanding  that was issued upon the
Old  ONS  Preferred   Share   Conversion,   all  dividends  that  were  accrued,
accumulated, and unpaid at the time of the Old ONS Preferred Share Conversion on
the Old ONS Preferred Share that was converted into such Preferred Share,  shall
be  accumulated  and shall  remain  accumulated  dividends  with respect to such
Preferred Share until paid.

                  1C.  Distribution  of  Partial  Dividend  Payments.  Except in
connection  with  redemptions or repurchases  (i) pursuant to paragraph 4A or 4B
below,  (ii) in compliance  with paragraph 4H below, or (iii) as provided in the
Purchase  Agreement,  if at any time the  Corporation  pays  less than the total
amount of  dividends  then accrued with  respect to the  Preferred  Stock,  such
payment shall be  distributed  ratably among the holders  thereof based upon the

<PAGE>

aggregate accrued but unpaid dividends on the Preferred Shares held by each such
holder and such payment shall be applied  first to dividends  which have accrued
on such Preferred Shares during the period since the latest  preceding  Dividend
Reference  Date and second to reduce any  accumulated  dividends with respect to
such Preferred Shares.

                  Section 2.        Liquidation.
                                    -----------
                  Upon any Liquidation,  each holder of Preferred Stock shall be
entitled to be paid,  before any distribution or payment is made upon any Junior
Securities,  an  amount  in cash  equal  to the  greater  of (a)  the  aggregate
Liquidation  Value  (plus all  accrued  and unpaid  dividends)  of all shares of
Preferred Stock held by such holder or (b) the amount which would be distributed
with  respect to the shares of Common  Stock  (including  fractional  shares for
purposes  of this  calculation)  into which such shares of  Preferred  Stock are
convertible (assuming conversion of all outstanding Preferred Stock) immediately
prior to the record date for such  distribution  (or, if there is no such record
date,  then the date as of which the  holders of Common  Stock  entitled to such
distribution  are  determined);  and the holders of Preferred Stock shall not be
entitled to any further payment.  If upon any such Liquidation the Corporation's
assets  to  be  distributed  among  the  holders  of  the  Preferred  Stock  are
insufficient  to permit  payment to such holders of the  aggregate  amount which
they are entitled to be paid, then the entire assets to be distributed  shall be
distributed  ratably  among such holders  based upon the  aggregate  Liquidation
Value (plus all accrued and unpaid  dividends) of the  Preferred  Shares held by
each such holder.  Prior to such Liquidation,  the Corporation shall declare for
payment all accrued and unpaid  dividends  with respect to the Preferred  Stock.
(Payment of the greater of the amounts  specified in clauses (a) and (b) of this
Section 2 in respect of such Preferred Shares shall  constitute  payment of such
declared   dividends.)  The  Corporation  shall  mail  written  notice  of  such
Liquidation,  not less than 60 days prior to the payment date stated therein, to
each record holder of Preferred Stock.

                  Section 3.        [Reserved.]
                                     --------
                  Section 4.        Redemptions.
                                    -----------
                  4A.      Redemption at Option of Corporation.
                           -----------------------------------

                  (i) The  Corporation may at any time redeem all or, subject to
paragraph  4E  below,  any of  the  Preferred  Shares  then  outstanding  at the
Redemption  Price,  provided  that no redemption  pursuant to this  paragraph 4A
shall be for Preferred Shares with an aggregate  Liquidation  Value of less than
$1,000,000 (or such lesser number of Preferred Shares then outstanding).

                                      -2-

<PAGE>

                  (ii) The Corporation  may in connection with a  Reorganization
redeem all or any of the Preferred  Shares then  outstanding  at the  Redemption
Price, payable at the time of the consummation of the Reorganization as follows:

                  (a)      first,  in Freely  Tradeable  Securities in an amount
                           not to exceed the lesser of (1) the Redemption  Price
                           of such Preferred Shares and (2) the amount of Freely
                           Tradeable   Securities   that,  if  such  holder  had
                           converted  such  Preferred  Shares into Common  Stock
                           immediately prior to such Reorganization,  would have
                           been  issued to such holder in  connection  with such
                           Reorganization  in respect  of such  shares of Common
                           Stock; and

                  (b)      second,  the balance of the Redemption Price (if any)
                           in cash.

Notwithstanding paragraph 4H hereof, if the Corporation seeks the consent of the
holders of Preferred Stock to any Reorganization  under  subparagraph  3D(iv) of
the Purchase  Agreement,  and the  affirmative  consent of the holders  required
thereunder is not obtained,  the  Corporation may redeem at or prior to the time
of the  consummation  of such  Reorganization  and  pursuant  to this  paragraph
4A(ii),  all (but not  less  than  all) of the  Preferred  Shares  held by those
holders that did not affirmatively consent to such transaction.

                  4B.      Redemptions at the Option of the Holder.
                           ---------------------------------------

                  At any  time  after  the  fifth  anniversary  of the  Closing,
subject to subparagraph 4B(ii) below, each holder of Preferred Stock may request
redemption of all or a portion of the Preferred  Shares owned by such holder for
a price equal to the Redemption  Price.  Within five Business Days after receipt
of such request,  the Corporation shall give written notice to all other holders
of  Preferred  Stock,  and such other  holders may request  redemption  of their
Preferred  Shares by  delivering  written  notice to the  Corporation  within 10
Business Days after receipt of the Corporation's  notice.  The Corporation shall
pay the Redemption  Price of all Preferred Shares whose redemption has been duly
requested  pursuant to this paragraph 4B within 30 days after its receipt of the
initial request for such redemption.

                  Notwithstanding  the  above,  the  Corporation  shall  not  be
obligated  pursuant to this paragraph 4B to redeem any Preferred Share initially
issued  to a Small  Business  Investment  Company  licensed  by the  U.S.  Small
Business  Administration before the fifth anniversary of the Date of Issuance of
such Preferred Share,  provided that all such outstanding Preferred Shares shall
be  counted  as held by their  holders  for  purposes  of all pro rata and other
calculations.

                  (ii)  Notwithstanding  the  provisions of  subparagraph  4B(i)
above,  the Corporation  shall not be obligated to repurchase,  pursuant to this
paragraph 

                                      -3-

<PAGE>
4B:
                           (a) on a  cumulative  basis,  (x)  before  the  sixth
         anniversary  of the Closing,  a number of shares of Preferred  Stock in
         excess of  one-third  of all shares of  Preferred  Stock  issued by the
         Corporation at any time (for purposes of such calculation,  taking into
         account both repurchases  under this paragraph 4B and repurchases under
         paragraph  6A of the  Purchase  Agreement),  and (y) before the seventh
         anniversary  of the Closing,  a number of shares of Preferred  Stock in
         excess of  two-thirds  of all shares of  Preferred  Stock issued by the
         Corporation at any time (for purposes of such calculation,  taking into
         account both repurchases  under this paragraph 4B and repurchases under
         paragraph  6A of the  Purchase  Agreement)  (and at no time  shall  any
         initial  holder  and its  transferees  be  entitled  to sell  shares of
         Preferred Stock to the Corporation pursuant to this paragraph 4B to the
         extent that the aggregate number of such shares of Preferred Stock sold
         by such Persons at or before that time pursuant to this paragraph 4B or
         pursuant to paragraph 6A of the Purchase Agreement (limited in the case
         of a  transferee  to shares of  Preferred  Stock  acquired  directly or
         indirectly  from,  or acquired in respect of Preferred  Stock  acquired
         directly  or  indirectly   from,  such  initial  holder)  would,  on  a
         cumulative basis,  exceed an amount equal to (I) the maximum cumulative
         number of shares which the  Corporation may be required to redeem under
         this subparagraph 4B(ii)(a) at such time, multiplied by (II) a fraction
         (x)  the   numerator  of  which  is  the  aggregate   number,   without
         duplication,  of shares of Preferred Stock issued by the Corporation at
         any  time  that  was  held by such  holders  (limited  in the case of a
         transferee to shares of Preferred Stock acquired directly or indirectly
         from, or acquired in respect of Preferred  Stock  acquired  directly or
         indirectly from, such initial holder), and (y) the denominator of which
         is the aggregate number,  without  duplication,  of shares of Preferred
         Stock issued by the Corporation at any time); and

                           (b) for a  period  of 180  days  after  the  date the
         Corporation  redeems  shares of Preferred  Stock  pursuant to paragraph
         4B(i),  any  shares  of  Preferred  Stock  pursuant  to a  request  for
         redemption  under paragraph 4B(i) that is requested  subsequent to, and
         not as part of, such prior redemption.

                  4C. Redemption  Payment.  For each Preferred Share which is to
be redeemed (and except as otherwise  provided in paragraph  4A(ii) above),  the
Corporation  shall be  obligated  on the  Redemption  Date to pay to the  holder
thereof (upon surrender by such holder at the Corporation's  principal office of
the  certificate  representing  such  Preferred  Share) an amount in immediately
available  funds equal to the Redemption  Price of such Preferred  Share. If the
funds of the Corporation legally available for redemption of Preferred Shares on
any  Redemption  Date are  insufficient  to redeem the total number of Preferred
Shares to be  redeemed on such date,  those  funds  which are legally  available
shall be used to 

                                      -4-
<PAGE>

redeem the maximum possible number of Preferred Shares ratably among the holders
of the Preferred Shares to be redeemed based upon the aggregate Redemption Price
of the  Preferred  Shares held by each such holder and the  remaining  Preferred
Shares will remain outstanding.  At any time thereafter when additional funds of
the  Corporation are legally  available for the redemption of Preferred  Shares,
such funds  shall  immediately  be used to redeem the  balance of the  Preferred
Shares which the  Corporation  has become  obligated to redeem on any Redemption
Date but  which it has not  redeemed.  In  connection  with  any  redemption  of
Preferred  Stock pursuant to this Section 4, the  Corporation  shall declare for
payment all dividends that are accrued and unpaid as of the Redemption Date with
respect to the  Preferred  Shares  which are to be redeemed  on such  Redemption
Date. (Payment of the Redemption Price in respect of such Preferred Shares shall
constitute payment of such declared dividends.)

                  4D. Notice of Redemption.  The Corporation  shall mail written
notice of each  redemption of any Preferred  Stock to each record holder thereof
not  more  than 60 nor  less  than 30  days  prior  to the  date on  which  such
redemption  is to be made in the case of a redemption  pursuant to paragraph 4A,
and not less than 5 Business Days prior to the date on which such  redemption is
to be made in the case of a redemption  pursuant to  paragraph  4B. Upon mailing
any such notice of redemption,  the Corporation shall become obligated to redeem
the total  number of  Preferred  Shares  specified in such notice at the time of
redemption  specified therein.  In case fewer than the total number of Preferred
Shares   represented  by  any  certificate  are  redeemed,   a  new  certificate
representing  the number of unredeemed  Preferred  Shares shall be issued to the
holder  thereof  without cost to such holder  within three  Business  Days after
surrender of the certificate representing the redeemed Preferred Shares.

                  4E.  Determination  of the Number of Each  Holder's  Preferred
Shares to be Redeemed.  The number of Preferred  Shares to be redeemed from each
holder thereof in redemptions pursuant to paragraph 4A(i) shall be the number of
Preferred Shares  determined by multiplying the total number of Preferred Shares
to be  redeemed  by a  fraction,  the  numerator  of which  shall  be the  total
Redemption  Price  of  Preferred  Shares  then  held  by  such  holder  and  the
denominator of which shall be the aggregate Redemption Price of Preferred Shares
then outstanding.

                  4F.  Dividends  After  Redemption  Date. No Preferred Share is
entitled to any dividends  accruing after the Redemption Date. On the Redemption
Date of any Preferred  Share,  all rights of the holder of such Preferred  Share
shall cease, and such Preferred Share shall not be deemed to be outstanding.

                  4G.  Redeemed or  Otherwise  Acquired  Preferred  Shares.  Any
Preferred  Shares which are redeemed or  otherwise  acquired by the  Corporation
thereupon shall be retired.  All such shares shall upon their retirement  become
authorized but unissued shares of preferred stock of the Corporation and may not

                                      -5-

<PAGE>

be  reissued as  Preferred  Stock but may be reissued as part of a new series of
preferred  stock to be  created by  resolution  or  resolutions  of the board of
directors,  subject to the conditions or  restrictions  on issuance set forth in
the certificate of incorporation of the Corporation.

                  4H. Other Redemptions or Acquisitions. Neither the Corporation
nor any Subsidiary shall redeem or otherwise acquire any Preferred Stock, except
as expressly authorized herein or pursuant to the Purchase Agreement or pursuant
to a purchase offer made pro rata to all holders of Preferred Stock on the basis
of the aggregate  Redemption  Price of the  Preferred  Shares owned by each such
holder.

                  Section 5.        Voting Rights.
                                    -------------
                  The holders of the Preferred Stock shall be entitled to notice
of all stockholders  meetings in accordance with the Corporation's  bylaws,  and
except as otherwise required by law, the holders of the Preferred Stock shall be
entitled  to  vote  on all  matters  submitted  to the  stockholders  for a vote
together with the holders of the Common Stock voting  together as a single class
with  each  share of  Common  Stock  entitled  to one vote per  share,  and each
Preferred  Share  (including  fractional  shares)  entitled to one vote for each
share of Common Stock that would be issuable upon  conversion of such  Preferred
Share at the time the vote is taken.

                  Section 6.        Conversion.
                                    ----------

                  6A.      Conversion Procedure.
                           --------------------

                  (i) At any time  and  from  time to time  after  the  issuance
thereof,  any holder of Preferred  Stock may convert all or any of the Preferred
Shares  (including any fraction of a Preferred Share) held by such holder into a
number of shares of Common Stock computed by multiplying the number of Preferred
Shares to be converted by the  Liquidation  Value and dividing the result by the
Conversion Price then in effect.

                  (ii) Each  conversion  of  Preferred  Stock shall be deemed to
have  been  effected  as of the  close of  business  on the  date on  which  the
certificate or certificates  representing  the Preferred  Shares to be converted
have been surrendered at the principal  office of the Corporation.  At such time
as such conversion has been effected, the rights of the holder of such Preferred
Shares as such holder  shall  cease,  all accrued and unpaid  dividends  on such
Preferred  Shares shall be deemed to have been  forfeited  immediately  prior to
such  conversion,  and  the  Person  or  Persons  in  whose  name or  names  any
certificate  or  certificates  for shares of Common  Stock are to be issued upon
such  conversion  shall be deemed to have become the holder or holders of record
of the shares of Common Stock represented thereby.

                                      -6-

<PAGE>

                  (iii) The conversion  rights of any Preferred Share subject to
redemption  hereunder  shall terminate on the Redemption Date for such Preferred
Share  unless  the  Corporation  has  failed to pay to the  holder  thereof  the
Redemption Price thereof.

                  (iv)   Notwithstanding  any  other  provision  thereof,  if  a
conversion  of any Preferred  Shares is to be made in  connection  with a Public
Offering,  such  conversion may, at the election of the holder of such Preferred
Shares,  be conditioned upon the  consummation of the Public Offering,  in which
case such conversion  shall not be deemed to be effective until the consummation
of the Public Offering.

                  (v) As soon as possible  after a conversion  has been effected
(but in any event  within five  Business  Days in the case of  subparagraph  (a)
below), the Corporation shall deliver to the converting holder:

                           (a) a certificate or  certificates  representing  the
        number of shares of Common Stock  issuable by reason of such  conversion
        in such  name or names and such  denomination  or  denominations  as the
        converting holder has specified;

                           (b) payment of the amount payable under  subparagraph
        (viii) below with respect to such conversion; and

                           (c) a certificate  representing  any Preferred Shares
        which were  represented by the certificate or certificates  delivered to
        the  Corporation in connection  with such  conversion but which were not
        converted.

                  (vi) The issuance of  certificates  for shares of Common Stock
upon  conversion of Preferred  Stock shall be made without charge to the holders
of such  Preferred  Stock for any issuance tax in respect  thereof or other cost
incurred by the  Corporation in connection  with such conversion and the related
issuance of shares of Common Stock.

                  (vii) The  Corporation  shall not close its books  against the
transfer  of  Preferred  Stock  or of  Common  Stock  issued  or  issuable  upon
conversion  of Preferred  Stock in any manner which  interferes  with the timely
conversion of Preferred Stock.  The Corporation  shall assist and cooperate (but
the Corporation  shall not be required to expend  substantial  efforts or funds)
with any holder of Preferred Shares required to make any governmental filings or
obtain any  governmental  approval prior to or in connection with any conversion
of Preferred Shares hereunder (including, without limitation, making any filings
required to be made by the Corporation).

                                      -7-
<PAGE>

                  (viii) If any  fractional  interest in a share of Common Stock
would,  except for the provisions of this subparagraph,  be deliverable upon any
conversion of a holder's Preferred Stock, the Corporation, in lieu of delivering
the fractional  share therefor,  shall pay an amount to the holder thereof equal
to the Market Price of such fractional interest as of the date of conversion.

                  (ix) The  Corporation  shall  at all  times  reserve  and keep
available out of its authorized but unissued shares of Common Stock,  solely for
the purpose of issuance upon the  conversion of the Preferred  Stock or exercise
of the  Warrants,  such  number  of shares of  Common  Stock  issuable  upon the
conversion of all  outstanding  Preferred  Stock and exercise of all outstanding
Warrants  which may then be  exercised.  All shares of Common Stock which are so
issuable  shall,  when  issued,  be duly  and  validly  issued,  fully  paid and
nonassessable and free from all taxes, liens and charges.  The Corporation shall
take all such  actions as may be  necessary  to ensure  that all such  shares of
Common  Stock  may be so  issued  without  violation  of any  applicable  law or
governmental  regulation (excluding Investment  Regulations) or any requirements
of any  domestic  securities  exchange  upon which shares of Common Stock may be
listed  (except  for  official  notice of issuance  which  shall be  immediately
delivered by the Corporation upon each such issuance).

                  6B.      Conversion Price.
                           ----------------

                  (i) In order to  prevent  dilution  of the  conversion  rights
granted  under  this  subdivision,  the  Conversion  Price  shall be  subject to
adjustment from time to time pursuant to this Section 6.

                  (ii) If and  whenever  on or after the Date of Issuance of any
Preferred Share the Corporation issues or sells, or in accordance with paragraph
6C is deemed to have  issued or sold,  other than in an Excluded  Issuance,  any
share of Common  Stock for a  consideration  per share less than the  Conversion
Price  in  effect  immediately  prior  to such  time  with  respect  to any such
Preferred Share,  then forthwith upon such issue or sale the Conversion Price of
such Preferred Share shall be reduced to the lowest net price per share at which
any such share of Common Stock has been issued or sold or is deemed to have been
issued or sold.

                  6C. Effect on Conversion  Price of Certain Events.  Solely for
purposes of determining  the adjusted  Conversion  Price under paragraph 6B, the
following shall be applicable:

                  (i) Issuance of Rights or Options.  If the  Corporation in any
manner grants any Options and the lowest price per share for which any one share
of  Common  Stock is  issuable  upon the  exercise  of any such  Option  or upon
conversion or exchange of any  Convertible  Security is less than any Conversion
Price in effect  immediately  prior to the time of the  granting of such Option,
then such share of Common  Stock shall be deemed to have been issued and sold by
the  Corporation  at 

                                      -8-
<PAGE>

the time of the  granting  of such  Options  for such  price  per share and such
Conversion  Price shall be adjusted in accordance  with paragraph  6B(ii) above.
For purposes of this  paragraph,  the "lowest  price per share for which any one
share of  Common  Stock  is  issuable"  shall be equal to the sum of the  lowest
amounts of consideration (if any) received or receivable by the Corporation with
respect to any one share of Common Stock upon the  granting of the Option,  upon
exercise  of the Option  and upon  conversion  or  exchange  of the  Convertible
Security.  No further adjustment of such Conversion Price shall be made upon the
actual  issue of such  Common  Stock or of such  Convertible  Security  upon the
exercise  of such  Options or upon the actual  issue of such  Common  Stock upon
conversion or exchange of such Convertible Security.

                  (ii) Issuance of Convertible Securities. If the Corporation in
any manner  issues or sells any  Convertible  Security  and the lowest price per
share for which any one share of Common  Stock is issuable  upon  conversion  or
exchange thereof is less than any Conversion Price in effect  immediately  prior
to the time of such  issue or sale,  then such  share of Common  Stock  shall be
deemed  to have  been  issued  and  sold by the  Corporation  at the time of the
issuance  or sale of such  Convertible  Securities  for such price per share and
such  Conversion  Price shall be adjusted in accordance  with  paragraph  6B(ii)
above. For the purposes of this paragraph, the "lowest price per share for which
any one  share of  Common  Stock is  issuable"  shall be equal to the sum of the
lowest  amounts  of  consideration  (if  any)  received  or  receivable  by  the
Corporation  with  respect to any one share of Common Stock upon the issuance of
the Convertible Security and upon the conversion or exchange of such Convertible
Security.  No further adjustment of such Conversion Price shall be made upon the
actual issue of such Common Stock upon conversion or exchange of any Convertible
Security,  and if any such issue or sale of such  Convertible  Security  is made
upon exercise of any Options for which  adjustments of such Conversion Price had
been or are to be made  pursuant  to  other  provisions  of this  Section  6, no
further  adjustment  of such  Conversion  Price  shall be made by reason of such
issue or sale.

                  (iii)  Change  in  Option  Price or  Conversion  Rate.  If the
purchase price provided for in any Option, the additional consideration (if any)
payable upon the issue,  conversion or exchange of any Convertible  Security, or
the rate at which any Convertible  Security is convertible  into or exchangeable
for Common Stock change at any time, any Conversion  Price  previously  adjusted
with respect to such Option or Convertible Security and in effect at the time of
such change shall be readjusted to the Conversion Price which would have been in
effect at such time had such Option or Convertible  Security originally provided
for such changed purchase price, additional  consideration or changed conversion
rate, as the case may be, at the time initially granted, issued or sold.

                  (iv) Treatment of Expired Options and Unexercised  Convertible
Securities. Upon the expiration of any Option or the termination of any right to

                                      -9-
<PAGE>

convert or exchange any  Convertible  Security  without the exercise of any such
Option or right, any Conversion Price then in effect hereunder shall be adjusted
to the  Conversion  Price  which  would  have been in effect at the time of such
expiration or termination had such Option or Convertible Security, to the extent
outstanding  immediately  prior to such  expiration or  termination,  never been
issued.

                  (v)  Calculation  of  Consideration  Received.  If any  Common
Stock,  Option or Convertible  Security is issued or sold or deemed to have been
issued or sold for cash, the consideration received there for shall be deemed to
be the amount  received by the Corporation  therefor.  In case any Common Stock,
Options or Convertible  Securities are issued or sold for a consideration  other
than cash,  the amount of the  consideration  other  than cash  received  by the
Corporation  shall be the fair value of such  consideration,  except  where such
consideration consists of securities,  in which case the amount of consideration
received by the Corporation  shall be the Market Price thereof as of the date of
receipt.  If any Common Stock,  Option or Convertible  Security is issued to the
owners of the  non-surviving  entity in connection  with any merger in which the
Corporation is the surviving corporation,  the amount of consideration there for
shall be deemed to be the fair value of such  portion of the assets and business
of the non-surviving  entity as is attributable to such Common Stock, Options or
Convertible Securities,  as the case may be. The fair value of any consideration
other than cash and securities  shall be determined  jointly by the  Corporation
and the holders of 70% of the outstanding  Preferred Shares. If such parties are
unable to reach agreement within a reasonable  period of time, the fair value of
such consideration shall be determined by an independent  appraiser  experienced
in valuing such type of  consideration  jointly  selected by the Corporation and
the holders of 70% of the outstanding  Preferred  Shares.  The  determination of
such  appraiser  shall be final and binding upon the  parties,  and the fees and
expenses of such appraiser shall be borne by the Corporation.

                  (vi) Integrated Transactions.  In case any Option is issued in
connection  with  the  issue  or sale of other  securities  of the  Corporation,
together   comprising   one   integrated   transaction   in  which  no  specific
consideration  is  allocated to such Option by the parties  thereto,  the Option
shall be deemed to have been issued for a consideration of $.01.

                  (vii)  Treasury  Shares.  The number of shares of Common Stock
outstanding  at any given time does not include  shares  owned or held by or for
the account of the  Corporation or any  Subsidiary,  and the  disposition of any
shares so owned or held shall be considered an issue or sale of Common Stock.

                  (viii) Record Date. If the Corporation fixes a record date for
determining  the holders of Common  Stock  entitled (a) to receive a dividend or
other distribution payable in Common Stock, Options or in Convertible Securities
or (b) to  subscribe  for or  purchase  Common  Stock,  Options  or  Convertible
Securities, then such record date shall be deemed to be the date of the issue or
sale of the shares of 

                                      -10-
<PAGE>

Common  Stock  deemed to have been issued or sold upon the  declaration  of such
dividend  or upon  the  making  of such  other  distribution  or the date of the
granting of such right of subscription or purchase, as the case may be.

                  6D.  Subdivision  or  Combination  of  Common  Stock.  If  the
Corporation  at any  time  subdivides  (by  any  stock  split,  stock  dividend,
recapitalization  or otherwise) one or more classes of its outstanding shares of
Common Stock into a greater  number of shares,  any  Conversion  Price in effect
immediately prior to such subdivision shall be proportionately  reduced,  and if
the  Corporation  at any time combines (by reverse stock split or otherwise) one
or more classes of its outstanding  shares of Common Stock into a smaller number
of shares,  any Conversion Price in effect immediately prior to such combination
shall be proportionately increased.

                  6E. Reorganization, Reclassification, Consolidation, Merger or
Sale.  In  connection  with any  Organic  Change,  the  Corporation  shall  make
appropriate  provisions (in form and substance  reasonably  satisfactory  to the
holders of 70% of the Preferred Shares then  outstanding) to insure that each of
the holders of Preferred  Stock shall  thereafter  have the right to acquire and
receive,  in lieu of or in addition to (as the case may be) the shares of Common
Stock immediately  theretofore  acquirable and receivable upon the conversion of
such holder's  Preferred  Stock,  such shares of stock,  securities or assets as
such holder would have received in connection  with such Organic  Change if such
holder had  converted  its  Preferred  Stock  immediately  prior to such Organic
Change.  In  each  such  case,  the  Corporation  shall  also  make  appropriate
provisions (in form and substance reasonably  satisfactory to the holders of 70%
of the Preferred Shares then  outstanding) to insure that the provisions of this
Section 6 and  Sections 7 and 8 hereof shall  thereafter  be  applicable  to the
Preferred Stock  (including,  in the case of any such  consolidation,  merger or
sale in which the  successor  entity  or  purchasing  entity  is other  than the
Corporation,  an immediate  adjustment of the Conversion  Price to the value for
the Common Stock reflected by the terms of such  consolidation,  merger or sale,
and a corresponding immediate adjustment in the number of shares of Common Stock
acquirable and receivable  upon  conversion of Preferred  Stock, if the value so
reflected is less than the Conversion Price in effect  immediately prior to such
consolidation, merger or sale).

                  6F.  Certain   Events.   If  any  event  occurs  of  the  type
contemplated by the provisions of this Section 6 but not expressly  provided for
by such  provisions  (including,  without  limitation,  the  granting  of  stock
appreciation rights, phantom stock rights or other rights with equity features),
then the Corporation's  board of directors shall make an appropriate  adjustment
in each Conversion Price so as to protect the rights of the holders of Preferred
Stock;  provided that no such adjustment  shall increase any Conversion Price as
otherwise determined pursuant to this Section 6 or decrease the number of shares
of Conversion Stock issuable upon conversion of each share of Preferred Stock.

                                      -11-
<PAGE>

                  6G.      Notices.
                           -------

                  (i) Immediately  upon any adjustment of any Conversion  Price,
the  Corporation  shall give written  notice thereof to all holders of Preferred
Stock, setting forth in reasonable detail and certifying the calculation of such
adjustment.

                  (ii) The Corporation  shall give written notice to all holders
of Preferred  Stock at least 20 days prior to the date on which the  Corporation
closes  its books or fixes a record  date (a) with  respect to any  dividend  or
distribution  upon Common Stock,  (b) with respect to any pro rata  subscription
offer to  holders  of Common  Stock or (c) for  determining  rights to vote with
respect to any Organic Change or Liquidation.

                  (iii)  The  Corporation  shall  also  give  written  notice to
holders  of  Preferred  Stock at least  20 days  prior to the date on which  any
Organic Change shall take place.

                  6H.  Mandatory  Conversion.  The  Corporation  may  require by
written notice to all holders of Preferred  Stock,  the conversion of all of the
outstanding  Preferred Stock, at the then applicable Conversion Price or Prices,
at any time after the second  anniversary of the Closing,  provided that (a) the
Closing Price of the Common Stock (adjusted proportionately for stock dividends,
stock splits,  combinations,  and similar  changes in the Common Stock occurring
after the Closing) on at least 30 of the 45 latest  trading days  preceding  the
date of the Corporation's  notice has been greater than (i) $12.50 per share, if
such notice is delivered  prior to the last day of the 30th month after Closing,
(ii)  $15.62 per share,  if such notice is  delivered  after the last day of the
30th month after Closing but prior to the third  anniversary of the Closing,  or
(iii)  $18.75  per  share,  if such  notice is  delivered  on or after the third
anniversary  of  the  Closing,   (b)  the  number  of  Public  Float  Securities
outstanding exceeds 20% of the number of shares of Common Stock outstanding on a
"fully diluted" basis (i.e.,  after giving effect to the exercise,  exchange and
conversion of all rights, options, warrants and convertible securities that are,
directly or indirectly,  exercisable or exchangeable  for, or convertible  into,
Common  Stock,   determined  without  regard  to  any  vesting   limitations  or
restrictions on exercise,  exchange or  conversion),  and (c) the holders of the
Preferred  Stock are not then  subject  to (and  will  not,  as a result of such
exercise,  become subject to) any agreement  restricting  the sale of the Common
Stock issued upon the conversion of the Preferred Stock.

                  Section 7.        Liquidating Dividends.
                                    ---------------------

                  If the  Corporation  declares or pays a  Liquidating  Dividend
upon the  Common  Stock,  then  the  Corporation  shall  pay to the  holders  of
Preferred Stock at the time of payment  thereof the Liquidating  Dividends which
would have been paid 

                                      -12-
<PAGE>

on  the  shares  of  Common  Stock  had  such  Preferred  Stock  been  converted
immediately  prior to the record  date fixed for  determining  the  stockholders
entitled to receive payment of such Liquidating Dividend,  or, if no record date
is fixed,  the date as of which the record  holders of Common Stock  entitled to
such dividends are to be determined.

                  Section 8.        Purchase Rights.
                                    ---------------
                  If at any time the  Corporation  grants,  issues  or sells any
Purchase  Rights  pro rata to the record  holders of any class of Common  Stock,
then each holder of Preferred Stock shall be entitled to acquire, upon the terms
applicable to such Purchase  Rights,  the aggregate  Purchase  Rights which such
holder  could  have  acquired  if such  holder  had held the number of shares of
Common Stock  acquirable  upon  conversion  of such  holder's  Preferred  Shares
immediately  before the date on which a record is taken for the grant,  issuance
or sale of such Purchase Rights,  or, if no such record is taken, the date as of
which the record  holders of Common  Stock are to be  determined  for the grant,
issue or sale of such Purchase Rights.

                  Section 9.    Consequences of Certain Events of Noncompliance.
                                -----------------------------------------------
                  (i) If an Event of  Noncompliance  of the  type  described  in
subparagraph  (ii) of the definition of Event of Noncompliance  has occurred and
has  continued  for a period of 30 days and is  continuing or any other Event of
Noncompliance  has occurred and is continuing,  the annual  dividend rate on the
Preferred  Stock shall  increase  immediately  by an increment of two percentage
points.  Thereafter,  until such time as no Event of Noncompliance  exists,  the
annual dividend rate shall increase  automatically at the end of each succeeding
90-day period by an  additional  increment of two  percentage  points (but in no
event shall the annual  dividend rate exceed 14%).  Any increase of the dividend
rate resulting from the operation of this  paragraph  shall  terminate as of the
close of business on the date on which no Event of Noncompliance exists, subject
to subsequent increases pursuant to this paragraph.

                  (ii) If both (a) either (1) an Event of  Noncompliance  of the
type  described  in  subparagraph  (i) or  (iii) of the  definition  of Event of
Noncompliance  has occurred and is continuing,  or (2) an Event of Noncompliance
of the type described in subparagraph (ii) or (iv) of the definition of Event of
Noncompliance  has  occurred  and has  continued  for a period of 60 days and is
continuing  and (b) the  holder or holders  of 70% of the  Preferred  Stock then
outstanding  have given  written  notice to the  Corporation  of their intent to
exercise their rights under this paragraph (ii) in connection with such Event of
Noncompliance  (which  notice may be given at any time after the  occurrence  of
such Event of Noncompliance)  and 30 days have lapsed since the date such notice
was  given,  then the  holder or  holders  of 70% of the  Preferred  Stock  then
outstanding  shall have the option to demand (by written notice delivered to the
Corporation  at any  time  thereafter  until  such  time as 

                                      -13-
<PAGE>

there  is no Event  of  Noncompliance  in  existence)  redemption  of all or any
portion of the  Preferred  Stock  owned by such holder or holders at a price per
Preferred  Share equal to the  Liquidation  Value  thereof (plus all accrued and
unpaid dividends  thereon).  The Corporation shall give prompt written notice of
such election to the other  holders of Preferred  Stock (but in any event within
five days after  receipt of the initial  demand for  redemption),  and each such
other holder shall have the option to demand redemption of all or any portion of
such  holder's   Preferred  Stock  by  giving  written  notice  thereof  to  the
Corporation  within seven days after receipt of the  Corporation's  notice.  The
Corporation  shall  redeem all  Preferred  Stock as to which  rights  under this
paragraph have been exercised within 15 days after receipt of the initial demand
for redemption.

                  (iii) If any Event of  Noncompliance  exists,  each  holder of
Preferred  Stock shall also have any other  rights which such holder is entitled
to under any  contract or  agreement at any time and any other rights which such
holder may have pursuant to applicable law.

                  Section 10.       Registration of Transfer.
                                    ------------------------

                  The Corporation  shall keep at its principal office a register
for the registration of Preferred  Stock.  Upon the surrender of any certificate
representing  Preferred  Stock at such  place,  the  Corporation  shall,  at the
request of the record  holder of such  certificate,  execute and deliver (at the
Corporation's  expense) a new certificate or  certificates in exchange  therefor
representing in the aggregate the number of Preferred Shares  represented by the
surrendered  certificate.  Each such new certificate shall be registered in such
name and shall represent such number of Preferred  Shares as is requested by the
holder of the surrendered  certificate and shall be  substantially  identical in
form to the surrendered certificate, and dividends shall accrue on the Preferred
Stock  represented by such new certificate from the date to which dividends have
been  fully  paid  on  such  Preferred  Stock  represented  by  the  surrendered
certificate.

                  Section 11.       Replacement.
                                    -----------

                  Upon  receipt  of  evidence  reasonably  satisfactory  to  the
Corporation (an affidavit of the registered holder shall be satisfactory) of the
ownership and the loss,  theft,  destruction  or  mutilation of any  certificate
evidencing Preferred Shares of any series of Preferred Stock, and in the case of
any such  loss,  theft or  destruction,  upon  receipt of  indemnity  reasonably
satisfactory  to the  Corporation  (provided  that if the holder is a  financial
institution  or  other  institutional  investor,  its  own  agreement  shall  be
satisfactory),  or, in the case of any such  mutilation  upon  surrender of such
certificate,  the Corporation shall (at its expense) execute and deliver in lieu
of such  certificate a new certificate of like kind  representing  the number of
Preferred Shares of such series represented by such lost,  stolen,  destroyed or
mutilated  certificate  and dated the date of such lost,  stolen,  destroyed  

                                      -14-
<PAGE>

or mutilated  certificate,  and dividends  shall accrue on the  Preferred  Stock
represented by such new  certificate  from the date to which dividends have been
fully paid on such lost, stolen, destroyed or mutilated certificate.

                  Section 12.       Definitions.
                                    -----------
                  "Business  Day" means a day on which banks are generally  open
for business in New York City.

                  "Closing"  has the  meaning  given  such term in the  Purchase
Agreement.

                  "Closing  Price"  of each  share  of  Common  Stock  or  other
security  means the composite  closing price of the sales of the Common Stock or
such other  security on all  securities  exchanges on which such security may at
the time be listed (as  reported in The Wall Street  Journal),  or, if there has
been no sale on any such exchange on any day, the average of the highest bid and
lowest  asked  prices of the  Common  Stock or such other  security  on all such
exchanges  at the end of such day,  or, if such  security is not so listed,  the
closing  price (or last price,  if  applicable)  of sales of the Common Stock or
such other  security  in the Nasdaq  National  Market (as  reported  in The Wall
Street  Journal)  on such day,  or if such  security is not quoted in the Nasdaq
National Market but is traded  over-the-counter,  the average of the highest bid
and lowest asked prices on such day in the  over-the-counter  market as reported
by  the  National  Quotation  Bureau  Incorporated,  or  any  similar  successor
organization.

                  "Common Stock" means,  collectively,  the Corporation's common
stock,  par value  $0.01 per share,  and any  capital  stock of any class of the
Corporation  hereafter  authorized  which  is  not  limited  to a  fixed  sum or
percentage  of par or stated  value in  respect  to the  rights  of the  holders
thereof to  participate in dividends or in the  distribution  of assets upon any
Liquidation  of  the  Corporation;  and if  there  is a  change  such  that  the
securities  issuable upon  conversion  of the  Preferred  Stock are issued by an
entity  other  than  the  Corporation  or  there  is a  change  in the  class of
securities so issuable, then the term "Common Stock" shall mean one share of the
security  issuable upon  conversion  of the Preferred  Stock if such security is
issuable in shares,  or shall mean the smallest  unit in which such  security is
issuable if such security is not issuable in shares.

                  "Conversion  Price"  shall mean,  with respect to any Series A
Share,  $6.25  (subject  to  adjustment  as  provided  in  Section 6 for  events
occurring after the Closing).

                  "Convertible  Security" means any stock or other securities of
the Corporation convertible into or exchangeable for Common Stock.


                                      -15-
<PAGE>

                  "Corporation"  means Orion Newco  Services,  Inc.,  a Delaware
corporation.

                  "Date of Issuance," with respect to any Preferred Share, means
the date on  which  the  Corporation  initially  issues  such  Preferred  Share,
regardless of the number of times  transfer of such  Preferred  Share is made on
the stock records  maintained by or for the  Corporation  and  regardless of the
number of certificates which may be issued to evidence such Preferred Share.

                  "Dividend  Reference  Dates"  mean  August  31,  November  30,
February 28 and May 31 of each year.

                  "Excluded  Issuance"  means the issue or sale of (i) shares of
Common Stock in respect of any transaction described in paragraph 6D or pursuant
to the Old ONS Merger Agreement,  (ii) up to an aggregate of 2,203,960 shares of
Common  Stock  by the  Corporation  pursuant  to the  exercise  of  Options  and
Convertible Securities outstanding  immediately prior to the Closing at exercise
prices  that are  greater  than or equal to the  respective  exercise  prices in
effect as of Closing (as adjusted  pursuant to the terms of such  securities  to
give effect to stock  dividends  or stock splits or a  combination  of shares in
connection   with   a   recapitalization,   merger,   consolidation   or   other
reorganization occurring after the Closing), (iii) up to an aggregate of 150,000
shares of Common Stock by the  Corporation  for any purpose,  or (iv) Options to
acquire Common Stock by the Corporation  pursuant to a resolution of, or a stock
option  plan  approved  by a  resolution  of,  the  Board  of  Directors  of the
Corporation  (or  the  compensation  committee  thereof)  to  the  Corporation's
employees, the per share exercise price of which is greater than or equal to the
fair market  value of a share of Common Stock at the time such Option is issued,
as determined by the Board of Directors of the Corporation (or the  compensation
committee thereof).

                  "Event  of  Noncompliance"  means  and shall be deemed to have
occurred if:

                           (i) the  Corporation  fails  to make  any  redemption
         payment  with respect to the  Preferred  Stock which it is obligated to
         make hereunder,  whether or not such payment is legally  permissible or
         is prohibited by any agreement to which the Corporation is subject;

                           (ii) the  Corporation  breaches or otherwise fails to
         perform or observe any other  covenant or agreement set forth herein or
         in  the  Purchase  Agreement;   provided,   first,  that  no  Event  of
         Noncompliance  shall be deemed to have occurred under this subparagraph
         (ii) if the  Corporation  reasonably  establishes  that  the  Event  of
         Noncompliance  is not material to the  financial  condition,  operating
         results,  operations or assets of the Corporation and its Subsidiaries,
         taken as a whole, or to any holder's investment in the Preferred 

                                      -16-
<PAGE>

         Stock; and provided, second, that, so long as the Corporation commences
         promptly and continues to exercise  reasonable and diligent  efforts to
         cure  the  Event  of  Noncompliance  (if  cure is  possible)  within  a
         reasonable time after its occurrence,  the applicable grace periods set
         forth in paragraph (i) and in clause (a) of paragraph (ii) of Section 9
         shall be extended  with  respect to such Event of  Noncompliance  for a
         period of time  equal to the  period  during  which  such  efforts  are
         continuing;

                           (iii) any  representation,  warranty or certification
         by or on behalf of the Corporation  contained in the Purchase Agreement
         or required to be furnished to any holder of Preferred  Stock  pursuant
         to the  Purchase  Agreement  is false  or  misleading  in any  material
         respect  on the  date  made;  provided,  however,  that  any  Event  of
         Noncompliance  under this clause (iii) resulting from the delivery of a
         certification  that is made in good  faith  but is false or  misleading
         shall be  deemed to be cured  from and  after the date a  certification
         correcting the earlier false or misleading  certification  is delivered
         to the  holders of the  Preferred  Stock,  which  delivery  shall occur
         promptly   after  the  facts  or  events  that   caused  such   earlier
         certification   to  be  false  or   misleading   become  known  to  the
         Corporation; or

                           (iv)  the  Corporation  or any  Subsidiary  makes  an
         assignment  for the  benefit  of  creditors  or admits in  writing  its
         inability  to pay its debts  generally as they become due; or an order,
         judgment  or decree is  entered  adjudicating  the  Corporation  or any
         Subsidiary bankrupt or insolvent;  or any order for relief with respect
         to the  Corporation  or any  Subsidiary  is entered  under the  Federal
         Bankruptcy  Code; or the  Corporation  or any  Subsidiary  petitions or
         applies to any tribunal for the  appointment  of a custodian,  trustee,
         receiver or liquidator of the  Corporation  or any Subsidiary or of any
         substantial part of the assets of the Corporation or any Subsidiary, or
         commences  any  proceeding  (other than a proceeding  for the voluntary
         liquidation   and   dissolution  of  a  Subsidiary)   relating  to  the
         Corporation or any  Subsidiary  under any  bankruptcy,  reorganization,
         arrangement,   insolvency,   readjustment   of  debt,   dissolution  or
         liquidation  law  of  any   jurisdiction;   or  any  such  petition  or
         application is filed, or any such proceeding is commenced,  against the
         Corporation  or any  Subsidiary  and either (a) the  Corporation or any
         such  Subsidiary  by any act indicates  its approval  thereof,  consent
         thereto or  acquiescence  therein or (b) such petition,  application or
         proceeding is not dismissed within 60 days.

                  "Freely Tradeable  Securities" has the meaning given such term
in the Purchase Agreement.

                  "Fundamental  Change" has the  meaning  given such term in the
Purchase Agreement.

                                      -17-
<PAGE>

                  "Investment  Regulations"  means, as applicable,  Title III of
the Small  Business  Investment  Act of 1958,  as amended,  and the  regulations
promulgated  thereunder,  Regulation  Y (Title 12, Code of Federal  Regulations,
Part  225)  under  Section  5(b) of the Bank  Holding  Company  Act of 1956,  as
amended,  or other similar laws or  regulations  governing a regulated  Person's
investment authority.

                  "Junior  Securities"  means Common Stock and any other capital
stock or other equity  securities  issued by the Corporation,  whether currently
existing or hereafter authorized or issued.

                  "Liquidation" means the liquidation, dissolution or winding up
of the Corporation;  provided, however, that neither the consolidation or merger
of the  Corporation  into or with any other entity or entities,  nor the sale or
transfer by the Corporation of all or any part of its assets,  nor the reduction
of the capital stock of the  Corporation,  shall be deemed to be a  liquidation,
dissolution or winding up of the Corporation.

                  "Liquidating  Dividend" means a dividend upon the Common Stock
payable otherwise than in cash out of earnings or earned surplus  (determined in
accordance with generally accepted accounting principles,  consistently applied)
except for a stock dividend payable in shares of Common Stock.

                  "Liquidation  Value" of any Preferred  Share shall be equal to
$1,000.

                  "Market Price" of each share of Common Stock or other security
means the Closing Price of such share or other security,  averaged over a period
of 21  days  consisting  of the  day as of  which  the  Market  Price  is  being
determined  and the 20  consecutive  Business  Days prior to such day. If during
this period such security is not listed on any  securities  exchange,  quoted in
the Nasdaq National Market, or quoted in the over-the-counter market, the Market
Price will be the fair value of such security  determined  by agreement  between
the Company and the holders of 70% of the outstanding  Preferred Shares. If such
parties are unable to reach  agreement  within a reasonable  period of time, the
fair value of such  security  shall be determined  by an  independent  appraiser
experienced  in  valuing  such type of  consideration  jointly  selected  by the
Corporation  and the holders of 70% of the  outstanding  Preferred  Shares.  The
determination of such appraiser shall be final and binding upon the parties, and
the fees and expenses of such appraiser shall be borne by the Corporation.

                  "Old ONS" Orion Network Systems,  Inc., a Delaware Corporation
incorporated in 1982.

                  "Old ONS Merger  Agreement"  means the  Agreement  and Plan of
2Merger dated as of January 8, 1997,  by and among the  Corporation, Old ONS and
Orion Merger Company, Inc.


                                      -18-
<PAGE>

                  "Old ONS Preferred Share" means one (1) share of the series of
the preferred  stock of Old ONS having the  designation  "Series A 8% Cumulative
Redeemable   Convertible   Preferred  Stock,"  as  set  forth  in  that  certain
"Certificate of  Designations,  Rights and Preferences of Series A 8% Cumulative
Redeemable  Convertible  Preferred Stock of Orion Network  Systems,  Inc." filed
with the Secretary of State of the State of Delaware on June 17, 1994.

                  "Old ONS Preferred Share  Conversion"  means the conversion of
Old ONS Preferred Shares into the right to receive Preferred Shares, pursuant to
the Old ONS Merger Agreement.

                  "Options"  means any right or  option to  subscribe  for or to
purchase Common Stock or any Convertible Securities.

                  "Organic Change" means any  recapitalization,  reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Corporation's assets to another Person or other transaction which is effected in
such a manner  that  holders of Common  Stock are  entitled  to receive  (either
directly  or upon  subsequent  liquidation)  stock,  securities  or assets  with
respect to or in exchange for Common Stock.

                  "Person" means an individual, a partnership, a corporation, an
association,  a joint stock company,  a limited  liability  company,  a trust, a
joint venture,  an unincorporated  organization and a governmental entity or any
department, agency or political subdivision thereof.

                  "Preferred Share" means a share of Preferred Stock.
                  
                  "Preferred Stock" means the Series A Preferred.

                  "Public   Float   Securities"   means,   as  of  any  date  of
determination,   those  shares  of  the  Corporation's  Common  Stock  that  (i)
previously  have been sold to the  public in an  offering  registered  under the
Securities Act or through a broker, dealer or market maker under Rule 144 of the
Securities Act, (ii) are listed for trading on a "national  securities exchange"
(within  the  meaning of the  Securities  Exchange  Act of 1934,  as amended) or
quoted on the  "National  Market  System" or  "National  List"  published by the
National  Association of Securities  Dealers Automated  Quotations System or any
successor  list, and (iii) are held by Persons other than the Corporation or any
of its "affiliates" (within the meaning of Rule 144 under the Securities Act).

                  "Public Offering" means any offering by the Corporation of its
equity securities to the public pursuant to an effective  registration statement
under the Securities Act of 1933, as then in effect, or any comparable statement
under  any  

                                      -19-
<PAGE>

similar federal statute then in force;  provided,  that "Public  Offering" shall
not  include an  offering  made in  connection  with a business  acquisition  or
combination or an employee benefit plan.

                  "Purchase Agreement" means the Purchase Agreement, dated as of
June 17, 1994, by and among Old ONS and certain investors, as such agreement may
from time to time be amended in accordance  with its terms,  the  performance of
Old ONS's  obligations  under which the Corporation  has assumed  pursuant to an
agreement dated as of _______, 199__, by and among Old ONS, the Corporation, and
such investors.

                  "Purchase Rights" mean any Options,  Convertible Securities or
rights to purchase stock, warrants, securities or other property.

                  "Redemption Date" means the date on which Price of a Preferred
Share is paid to the holder thereof.

                  "Redemption  Price" means, with respect to any Preferred Share
being redeemed,  the Liquidation  Value of such Preferred Share plus all accrued
and unpaid dividends thereon.

                  "Reorganization"  means  any  merger or  consolidation  of the
Corporation with any Person where both (i) either (a) the Corporation is not the
surviving  corporation,  (b) the terms of the Preferred Stock are altered in any
respect,  or (c) the Preferred Stock is exchanged for cash,  securities or other
property,   and  (ii)  such  merger  or  consolidation  does  not  constitute  a
Fundamental Change.

                  "Securities Act" means the Securities Act of 1933, as amended.

                  "Series  A  Preferred"  means  the  Corporation's  Series A 8%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series A Share" means a share of Series A Preferred.

                  "Subsidiary"  means, with respect to any Person,  corporation,
partnership, association or other business entity of which (i) if a corporation,
a majority of the total voting power of shares of stock entitled (without regard
to the  occurrence  of any  contingency)  to vote in the election of  directors,
managers or  trustees  thereof is at the time owned or  controlled,  directly or
indirectly,  by that  Person  or one or more of the other  Subsidiaries  of that
Person or a combination thereof, or (ii) if a partnership,  association or other
business  entity,  a majority  of the  partnership  or other  similar  ownership
interest thereof is at the time owned or controlled,  directly or indirectly, by
any Person or one or more Subsidiaries of that person or a combination  thereof.
For  purposes  hereof,  a Person or  Persons  shall be 

                                      -20-
<PAGE>

deemed to have a majority  ownership  interest in a partnership,  association or
other business entity if such Person or Persons shall be allocated a majority of
partnership, association or other business entity gains or losses or shall be or
control a general  partner of such  partnership,  association  or other business
entity.   Without  limiting  the  foregoing,   International  Private  Satellite
Partners,  L.P.,  a  Delaware  limited  partnership,  shall  be  deemed  to be a
Subsidiary of the Corporation for so long as the Corporation or any of its other
Subsidiaries is the general partner thereof.

                  "Warrants"  means the Common Stock  purchase  warrants  issued
pursuant  to the  Purchase  Agreement  (whether  at the  Closing  or  thereafter
pursuant  to  paragraph  ID or  Section 7  thereof)  and any  warrant  issued in
exchange, substitution or replacement thereof.

                  Section 13.       Amendment and Waiver.
                                    --------------------

                  No  amendment,  modification  or waiver  shall be  binding  or
effective  with respect to any provision of Sections 1 to 13 hereof  without the
prior written consent of the holders of 70% of the Preferred Shares  outstanding
at the time such action is taken; provided, that no such action shall change (i)
the rate at which or the manner in which dividends on the Preferred Stock accrue
or the times at which such  dividends  become  payable or the amount  payable on
redemption of the Preferred Stock or the times at which  redemption of Preferred
Stock is to occur,  without the prior written consent of the holders of at least
90% of the Preferred Shares then  outstanding,  (ii) any Conversion Price of the
Preferred  Stock or the  number  of  shares  or class of stock  into  which  the
Preferred Stock is convertible, without the prior written consent of the holders
of at least 90% of the Preferred Stock then  outstanding or (iii) the percentage
required to approve any change in clauses (i) and (ii) above,  without the prior
written  consent  of the  holders  of at least 90% of the  Preferred  Stock then
outstanding.

                  Section 14.       Notices.
                                    -------

                  Except as otherwise expressly provided hereunder,  all notices
referred to herein shall be in writing and shall be delivered by  registered  or
certified mail,  return receipt  requested and postage prepaid,  or by reputable
overnight  courier service,  charges  prepaid,  and shall be deemed to have been
given when so mailed or sent (i) to the Corporation,  at its principal executive
offices and (ii) to any  stockholder,  at such holder's address as it appears in
the stock records of the  Corporation  (unless  otherwise  indicated by any such
holder).

                                      -21-

<PAGE>
                                                           

                          CERTIFICATE OF DESIGNATIONS,

                             RIGHTS AND PREFERENCES

                                       OF

                        SERIES B 8% CUMULATIVE REDEEMABLE

                           CONVERTIBLE PREFERRED STOCK

                                       OF

                           ORION NEWCO SERVICES, INC.


- --------------------------------------------------------------------------------
                             Pursuant to Section 151
                         of the General Corporation Law
                            of the State of Delaware
- --------------------------------------------------------------------------------




                  The  undersigned  DOES HEREBY  CERTIFY  that,  pursuant to the
authority  contained in Article FOURTH of the  Certificate of  Incorporation  of
Orion Newco Services,  Inc., a Delaware corporation (the "Corporation"),  and in
accordance  with  Section  151 of the  General  Corporation  Law of the State of
Delaware,  the Board of Directors of the Corporation has authorized the creation
of Series B 8%  Cumulative  Redeemable  Convertible  Preferred  Stock having the
designations,  rights and  preferences  as are set forth in Exhibit A hereto and
made a part hereof and that the  following  resolution  was duly  adopted by the
Board of Directors of the Corporation:

<PAGE>

                           RESOLVED,  that  a  series  of  authorized  Preferred
         Stock,  par value $.01 per share,  of the Corporation be, and it hereby
         is,  created;  that the shares of such series shall be, and they hereby
         are,  designated  as  "Series B 8%  Cumulative  Redeemable  Convertible
         Preferred  Stock";  that the number of shares  constituting such series
         shall be, and it hereby is, 5,000;  and that the  designations,  rights
         and  preferences  of the  shares  of such  series  are as set  forth in
         Exhibit A attached hereto and made a part hereof.


         IN WITNESS WHEREOF, the Corporation has caused its corporate seal to be
hereunto  affixed and this  Certificate  to be signed by its President and Chief
Executive  Officer and attested to by its Vice  President,  Corporate  and Legal
Affairs, and Secretary this ____ day of __________, 199__.

                                               ORION NEWCO SERVICES, INC.


                                               By:
                                                  ------------------------------
[SEAL]                                         Name:   W. Neil Bauer
                                               Title:  President/Chief Executive
                                                      Officer


ATTEST:


- ---------------------------------------------
Name:      Richard H. Shay, Esq.
Title:     Vice President, Corporate and
              Legal Affairs/Secretary


                                      -2-

<PAGE>



                                                                       EXHIBIT A
                                                                       ---------



                        SERIES B 8% CUMULATIVE REDEEMABLE
                           CONVERTIBLE PREFERRED STOCK


                  The following sections set forth the designations,  rights and
preferences  of the  Corporation's  Series B Preferred.  Capitalized  terms used
herein are defined in Section 12 below.

                  Section 1.        Dividends.
                                    ---------

                  1A.   General   Obligation.   When  and  as  declared  by  the
Corporation's  board of directors and to the extent  permitted under the General
Corporation Law of Delaware, the Corporation shall pay preferential dividends to
the holders of the  Preferred  Stock as  provided  in this  Section 1. Except as
otherwise  provided herein,  dividends on each Preferred Share shall accrue on a
daily  basis at the rate of 8% per  annum  of the sum of the  Liquidation  Value
thereof plus all accumulated and unpaid  dividends  thereon,  from and including
the Date of Issuance of such Preferred  Share to and including the date on which
the  Liquidation  Value of such  Preferred  Share  (plus all  accrued and unpaid
dividends  thereon)  is paid or the  date  on  which  such  Preferred  Share  is
converted into shares of Common Stock  hereunder.  Such  dividends  shall accrue
whether or not they have been  declared  and  whether or not there are  profits,
surplus or other funds of the Corporation  legally  available for the payment of
dividends.

                  1B.  Dividend  Reference  Dates.  To the  extent not paid on a
Dividend Reference Date, with the initial Dividend Reference Date being February
28, 1997, all dividends which have accrued on each Preferred  Share  outstanding
since the latest preceding  Dividend  Reference Date (or the Date of Issuance of
such Preferred  Share, if later) ending upon each such Dividend  Reference Date,
and, in the case of each Preferred  Share  outstanding  that was issued upon the
Old  ONS  Preferred   Share   Conversion,   all  dividends  that  were  accrued,
accumulated, and unpaid at the time of the Old ONS Preferred Share Conversion on
the Old ONS Preferred Share that was converted into such Preferred Share,  shall
be  accumulated  and shall  remain  accumulated  dividends  with respect to such
Preferred Share until paid.

                  1C.  Distribution  of  Partial  Dividend  Payments.  Except in
connection  with  redemptions or repurchases  (i) pursuant to paragraph 4A or 4B
below,  (ii) in compliance  with paragraph 4H below, or (iii) as provided in the
Purchase  Agreement,  if at any tide the  Corporation  pays  less than the 

                                      -3-
<PAGE>

total amount of dividends then accrued with respect to the Preferred  Stock such
payment shall be  distributed  ratably among the holders  thereof based upon the
aggregate accrued but unpaid dividends on the Preferred Shares held by each such
holder and such payment shall be applied  first to dividends  which have accrued
on such Preferred Shares during the period since the latest  preceding  Dividend
Reference  Date and second to reduce any  accumulated  dividends with respect to
such Preferred Shares.

                  Section 2.        Liquidation.
                                    -----------
                  Subject  to  the  provisions  of  Section  2 of the  Series  A
Certificate:  upon any  Liquidation,  each  holder of  Preferred  Stock shall be
entitled to be paid,  before any distribution or payment is made upon any Junior
Securities,  an  amount  in cash  equal  to the  greater  of (a)  the  aggregate
Liquidation  Value  (plus all  accrued  and unpaid  dividends)  of all shares of
Preferred Stock held by such holder or (b) the amount which would be distributed
with  respect to the shares of Common  Stock  (including  fractional  shares for
purposes  of this  calculation)  into which such shares of  Preferred  Stock are
convertible (assuming conversion of all outstanding Preferred Stock) immediately
prior to the record date for such  distribution  (or, if there is no such record
date,  then the date as of which the  holders of Common  Stock  entitled to such
distribution  are  determined),  and the holders of Preferred Stock shall not be
entitled  to  any  further  payment;  and  if  upon  any  such  Liquidation  the
Corporation's  assets to be distributed among the holders of the Preferred Stock
are insufficient to permit payment to such holders of the aggregate amount which
they are entitled to be paid, then the entire assets to be distributed  shall be
distributed  ratably  among such holders  based upon the  aggregate  Liquidation
Value (plus all accrued and unpaid  dividends) of the  Preferred  Shares held by
each such holder.  Prior to such Liquidation,  the Corporation shall declare for
payment all accrued and unpaid  dividends  with respect to the Preferred  Stock.
(Payment of the greater of the amounts  specified in clauses (a) and (b) of this
Section 2 in respect of such Preferred Shares shall  constitute  payment of such
declared   dividends.)  The  Corporation  shall  mail  written  notice  of  such
Liquidation,  not less than 60 days prior to the payment date stated therein, to
each record holder of Preferred Stock.

                  Section 3.        [Reserved.]
                                     --------

                  Section 4.        Redemptions.
                                    -----------

                  4A.      Redemption at Option of Corporation.
                           -----------------------------------

                  (i) The  Corporation may at any time redeem all or, subject to
paragraph  4E  below,  any of  the  Preferred  Shares  then  outstanding  at the
Redemption  Price,  provided  that no redemption  pursuant to this  paragraph 4A
shall be for Preferred Shares with an aggregate  Liquidation  Value of less 

                                      -4-
<PAGE>

than  $1,000,000  (less the aggregate  liquidation  value of any Series A Shares
being redeemed) or such lesser number of Preferred Shares then outstanding.

                  (ii) The Corporation  may in connection with a  Reorganization
redeem all or any of the Preferred  Shares then  outstanding  at the  Redemption
Price, payable at the time of the consummation of the Reorganization as follows:

                           (a)  first,  in  Freely  Tradeable  Securities  in an
         amount  not to exceed the  lesser of (1) the  Redemption  Price of such
         Preferred  Shares  and (2) the  amount of Freely  Tradeable  Securities
         that, if such holder had converted  such  Preferred  Shares into Common
         Stock immediately prior to such Reorganization,  would have been issued
         to such holder in  connection  with such  Reorganization  in respect of
         such shares of Common Stock; and

                           (b) second,  the balance of the Redemption  Price (if
         any) in cash.

Notwithstanding paragraph 4H hereof, if the Corporation seeks the consent of the
holders of Preferred Stock to any Reorganization  under  subparagraph  3D(iv) of
the Purchase  Agreement,  and the  affirmative  consent of the holders  required
thereunder is not obtained,  the  Corporation may redeem at or prior to the time
of the  consummation  of such  Reorganization  and  pursuant  to this  paragraph
4A(ii),  all (but not  less  than  all) of the  Preferred  Shares  held by those
holders that did not affirmatively consent to such transaction.

                  4B.      Redemptions at the Option of the Holder.
                           ---------------------------------------

                  (i) At any time after the fifth  anniversary  of the  Closing,
subject to subparagraph 4B(ii) below, each holder of Preferred Stock may request
redemption of all or a portion of the Preferred  Shares owned by such holder for
a price equal to the Redemption  Price.  Within five Business Days after receipt
of such request (or of any similar request under paragraph 4B(i) of the Series A
Certificate),  the Corporation shall give written notice to all other holders of
Preferred  Stock,  and  such  other  holders  may  request  redemption  of their
Preferred  Shares by  delivering  written  notice to the  Corporation  within 10
Business Days after receipt of the Corporation's  notice.  The Corporation shall
pay the Redemption  Price of all Preferred Shares whose redemption has been duly
requested  pursuant to this paragraph 4B within 30 days after its receipt of the
initial request for such redemption.

                  Notwithstanding  the  above,  the  Corporation  shall  not  be
obligated  pursuant to this paragraph 4B to redeem any Preferred Share initially
issued  to a Small  Business  Investment  Company  licensed  by the  U.S.  Small
Business  Administration before the fifth anniversary of the Date 

                                      -5-
<PAGE>

of  Issuance  of such  Preferred  Share,  provided  that  all  such  outstanding
Preferred  Shares shall be counted as held by their  holders for purposes of all
pro rata and other calculations.

                  (ii)  Notwithstanding  the  provisions of  subparagraph  4B(i)
above,  the Corporation  shall not be obligated to repurchase,  pursuant to this
paragraph 4B:

                           (a) on a  cumulative  basis,  (x)  before  the  sixth
         anniversary  of the  Closing,  a number of shares of  Preferred  Stock,
         which when taken together with the number of Series A Shares  similarly
         repurchased,  exceeds one-third of all shares of Series A Preferred and
         Series B Preferred  issued by the Corporation at any time (for purposes
         of such  calculation,  taking into account both repurchases  under this
         paragraph  4B,   repurchases   under  paragraph  4B  of  the  Series  A
         Certificate  and  repurchases   under  paragraph  6A  of  the  Purchase
         Agreement),  and (y) before the seventh  anniversary of the Closing,  a
         number of shares of Preferred Stock, which when taken together with the
         number of Series A Shares similarly repurchased,  exceeds two-thirds of
         all shares of Series A Preferred  and Series B Preferred  issued by the
         Corporation at any time (for purposes of such calculation,  taking into
         account both  repurchases  under this paragraph 4B,  repurchases  under
         paragraph  4B  of  the  Series  A  Certificate  and  repurchases  under
         paragraph  6A of the  Purchase  Agreement)  (and at no time  shall  any
         initial  holder  and its  transferees  be  entitled  to sell  shares of
         Preferred Stock to the Corporation pursuant to this paragraph 4B to the
         extent that the  aggregate  number of shares of Series A Preferred  and
         Series B Preferred sold by such Persons at or before that time pursuant
         to  this  paragraph  4B,  pursuant  to  paragraph  4B of the  Series  A
         Certificate  or  pursuant to  paragraph  6A of the  Purchase  Agreement
         (limited  in the case of a  transferee  to shares of Series A Preferred
         and  Series B  Preferred  acquired  directly  or  indirectly  from,  or
         acquired  in  respect  of  Series A  Preferred  or  Series B  Preferred
         acquired  directly or indirectly from, such initial holder) would, on a
         cumulative basis,  exceed an amount equal to (I) the maximum cumulative
         number of shares which the  Corporation may be required to redeem under
         this  subparagraph  43(ii)  (a) at  such  time,  multiplied  by  (II) a
         fraction (x) the  numerator of which is the aggregate  number,  without
         duplication,  of shares of Series A  Preferred  and Series B  Preferred
         issued by the  Corporation  at any time  that was held by such  holders
         (limited  in the case of a  transferee  to shares of Series A Preferred
         and  Series B  Preferred  acquired  directly  or  indirectly  from,  or
         acquired  in  respect  of Series A  Preferred  and  Series B  Preferred
         acquired directly or indirectly from, such initial holder), and (y) the
         denominator of which is the aggregate number,  without duplication,  of

                                      -6-
<PAGE>

         shares of  Series A  Preferred  and  Series B  Preferred  issued by the
         Corporation at any time); and

                           (b) for a  period  of 180  days  after  the  date the
         Corporation  redeems shares of Series B Preferred pursuant to paragraph
         4B(i) (or Series A Preferred  pursuant to paragraph 4B(i) of the Series
         A Certificate), any shares of Preferred Stock pursuant to a request for
         redemption  under paragraph 4B(i) that is requested  subsequent to, and
         not as part of, such prior redemption.

                  4C. Redemption  Payment.  For each Preferred Share which is to
be redeemed (and except as otherwise  provided in paragraph  4A(ii) above),  the
Corporation  shall be  obligated  on the  Redemption  Date to pay to the  holder
thereof (upon surrender by such holder at the  Corporations  principal office of
the  certificate  representing  such  Preferred  Share) an amount in immediately
available funds equal to the Redemption Price of such Preferred  Share.  Subject
to the provisions of paragraph 4C of the Series A  Certificate:  if the funds of
the  Corporation  legally  available for  redemption of Preferred  Shares on any
Redemption Date are  insufficient to redeem the total number of Preferred Shares
to be redeemed on such date,  those funds which are legally  available  shall be
used to redeem the maximum possible number of Preferred Shares ratably among the
holders  of the  Preferred  Shares  to be  redeemed  based  upon  the  aggregate
Redemption  Price of the  Preferred  Shares  held by each  such  holder  and the
remaining Preferred Shares will remain  outstanding;  and at any time thereafter
when  additional  funds  of  the  Corporation  are  legally  available  for  the
redemption of Preferred  Shares,  such funds shall immediately be used to redeem
the balance of the Preferred  Shares which the Corporation has become  obligated
to redeem on any  Redemption  Date but which it has not redeemed.  In connection
with  any  redemption  of  Preferred  Stock  pursuant  to this  Section  4,  the
Corporation  shall declare for payment all dividends that are accrued and unpaid
as of the Redemption  Date with respect to the Preferred  Shares which are to be
redeemed on such Redemption Date. (Payment of the Redemption Price in respect of
such Preferred Shares shall constitute payment of such declared dividends.)

                  4D. Notice of Redemption.  The Corporation  shall mail written
notice of each  redemption  of any Series A Preferred  or Series B Preferred  to
each  record  holder of  Preferred  Stock not more than 60 nor less than 30 days
prior  to the  date on  which  such  redemption  is to be made in the  case of a
redemption   pursuant  to  paragraph  4A  (or  paragraph  4A  of  the  Series  A
Certificate),  and not less than 5 Business Days prior to the date on which such
redemption  is to be made in the case of a  redemption  pursuant to paragraph 4B
(or paragraph 4B of the Series A  Certificate).  Upon mailing any such notice of
redemption, the Corporation shall become obligated to 

                                      -7-
<PAGE>

redeem the total number of Preferred Shares specified in such notice at the time
of  redemption  specified  therein.  In case  fewer  than the  total  number  of
Preferred Shares represented by any certificate are redeemed,  a new certificate
representing  the number of unredeemed  Preferred  Shares shall be issued to the
holder  thereof  without cost to such holder  within three  Business  Days after
surrender of the certificate representing the redeemed Preferred Shares.

                  4E.  Determination  of the Number of Each  Holder's  Preferred
Shares to be Redeemed.  The number of Preferred  Shares to be redeemed from each
holder thereof in redemptions pursuant to paragraph 4A(i) shall be the number of
Preferred Shares  determined by multiplying the total number of Preferred Shares
to be  redeemed  by a  fraction,  the  numerator  of which  shall  be the  total
Redemption  Price  of  Preferred  Shares  then  held  by  such  holder  and  the
denominator of which shall be the aggregate Redemption Price of Preferred Shares
then outstanding.

                  4F.  Dividends  after  Redemption  Date. No Preferred Share is
entitled to any dividends  accruing after the Redemption Date. On the Redemption
Date of any Preferred  Share,  all rights of the holder of such Preferred  Share
shall cease, and such Preferred Share shall not be deemed to be outstanding.

                  4G.  Redeemed or  Otherwise  Acquired  Preferred  Shares.  Any
Preferred  Shares which are redeemed or  otherwise  acquired by the  Corporation
thereupon shall be retired.  All such shares shall upon their retirement  become
authorized but unissued shares of preferred stock of the Corporation and may not
be  reissued as  Preferred  Stock but may be reissued as part of a new series of
preferred  stock to be  created by  resolution  or  resolutions  of the board of
directors,  subject to the conditions or  restrictions  on issuance set forth in
the certificate of incorporation of the Corporation.

                  4H. Other Redemptions or Acquisitions. Neither the Corporation
nor any Subsidiary shall redeem or otherwise acquire any Preferred Stock, except
as expressly authorized herein or pursuant to the Purchase Agreement or pursuant
to a purchase offer made pro rata to all holders or Preferred Stock on the basis
of the aggregate  Redemption  Price of the  Preferred  Shares owned by each such
holder.

                  Section 5         Voting Rights.
                                    -------------

                  The holders of the Preferred Stock shall be entitled to notice
of all stockholders  meetings in accordance with the Corporation's  bylaws,  and
except as otherwise required by law, the holders of the Preferred Stock shall be
entitled  to  vote  on all  matters  submitted  to the  stockholders  for a vote
together with the holders of the Common Stock voting  together as a single 


                                       -8-

<PAGE>

class with each share of Common Stock  entitled to one vote per share,  and each
Preferred  Share  (including  fractional  shares)  entitled to one vote for each
share of Common Stock that would be issuable upon  conversion of such  Preferred
Share at the time the vote is taken.

                  Section 6.        Conversion.
                                    ----------

                  6A.      Conversion Procedure.
                           --------------------
                  (i) At any time  and  from  time to time  after  the  issuance
thereof,  any holder of Preferred  Stock may convert all or any of the Preferred
Shares  (including any fraction of a Preferred Share) held by such holder into a
number of shares of Common Stock computed by multiplying the number of Preferred
Shares to be converted by the  Liquidation  Value and dividing the result by the
applicable Conversion Price then in effect.

                  (ii) Each  conversion  of  Preferred  Stock shall be deemed to
have  been  effected  as of the  close of  business  on the  date on  which  the
certificate or certificates  representing  the Preferred  Shares to be converted
have been surrendered at the principal  office of the Corporation.  At such time
as such conversion has been effected, the rights of the holder of such Preferred
Shares as such holder  shall  cease,  all accrued and unpaid  dividends  on such
Preferred  Shares shall be deemed to have been  forfeited  immediately  prior to
such  conversion,  and  the  Person  or  Persons  in  whose  name or  names  any
certificate  or  certificates  for shares of Common  Stock are to be issued upon
such  conversion  shall be deemed to have become the holder or holders of record
of the shares of Common Stock represented thereby.

                  (iii) The conversion  rights of any Preferred Share subject to
redemption  hereunder  shall terminate on the Redemption Date for such Preferred
Share  unless  the  Corporation  has  failed to pay to the  holder  thereof  the
Redemption Price thereof.

                  (iv)   Notwithstanding   any  other  provision  hereof,  if  a
conversion  of any Preferred  Shares is to be made in  connection  with a Public
Offering,  such  conversion may, at the election of the holder of such Preferred
Shares,  be conditioned upon the  consummation of the Public Offering,  in which
case such conversion  shall not be deemed to be effective until the consummation
of the Public Offering

                  (v) As soon as possible  after a conversion  has been effected
(but in any event  within five  Business  Days in the case of  subparagraph  (a)
below), the Corporation shall deliver to the converting holder:

                  (a) a certificate or certificates  representing  the number of
shares of Common  Stock  issuable by reason of such  conversion  in such name 

                                      -9-
<PAGE>

or names and such  denomination or  denominations  as the converting  holder has
specified;

                  (b) payment of the amount  payable under  subparagraph  (viii)
below with respect to such conversion; and

                  (c) a certificate representing any Preferred Shares which were
represented by the certificate or  certificates  delivered to the Corporation in
connection with such conversion but which were not converted.

                  (vi) The issuance of  certificates  for shares of Common Stock
upon  conversion of Preferred  Stock shall be made without charge to the holders
of such  Preferred  Stock for any issuance tax in respect  thereof or other cost
incurred by the  Corporation in connection  with such conversion and the related
issuance of shares of Common Stock.

                  (vii) The  Corporation  shall not close its books  against the
transfer  of  Preferred  Stock  or of  Common  Stock  issued  or  issuable  upon
conversion  of Preferred  Stock in any manner which  interferes  with the timely
conversion of Preferred Stock.  The Corporation  shall assist and cooperate (but
the Corporation  shall not be required to expend  substantial  efforts or funds)
with any holder of Preferred Shares required to make any governmental filings or
obtain any  governmental  approval prior to or in connection with any conversion
of Preferred Shares hereunder (including, without limitation, making any filings
required to be made by the Corporation).

                  (viii) If any  fractional  interest in a share of Common Stock
would,  except for the provisions of this subparagraph,  be deliverable upon any
conversion of a holder's Preferred Stock, the Corporation, in lieu of delivering
the fractional  share therefor,  shall pay an amount to the holder thereof equal
to the Market Price of such fractional interest as of the date of conversion.

                  (ix) The  Corporation  shall  at all  times  reserve  and keep
available out of its authorized but unissued shares of Common Stock,  solely for
the purpose of issuance upon the  conversion of the Preferred  Stock or exercise
of the  Warrants,  such  number  of shares of  Common  Stock  issuable  upon the
conversion of all  outstanding  Preferred  Stock and exercise of all outstanding
Warrants  which may then be  exercised.  All shares of Common Stock which are so
issuable  shall,  when  issued,  be duly  and  validly  issued,  fully  paid and
nonassessable and free from all taxes, liens and charges.  The Corporation shall
take all such  actions as may be  necessary  to ensure  that all such  shares of
Common  Stock  may be so  issued  without  violation  of any  applicable  law or
governmental  regulation (excluding Investment  Regulations) or any requirements
of any  domestic  securities  exchange  upon 

                                      -10-
<PAGE>

which  shares of  Common  Stock may be listed  (except  for  official  notice of
issuance which shall be immediately  delivered by the Corporation upon each such
issuance).

                  6B.      Conversion Price.
                           ----------------

                  (i) In order to  prevent  dilution  of the  conversion  rights
granted  under  this  subdivision,  the  Conversion  Price  shall be  subject to
adjustment from time to time pursuant to this Section 6.

                  (ii) If and  whenever  on or after the Date of Issuance of any
Preferred Share the Corporation issues or sells, or in accordance with paragraph
6C is deemed to have  issued or sold,  other than in an Excluded  Issuance,  any
share of Common  Stock for a  consideration  per share less than the  Conversion
Price  in  effect  immediately  prior  to such  time  with  respect  to any such
Preferred Share,  then forthwith upon such issue or sale the Conversion Price of
such Preferred Share shall be reduced to the lowest net price per share at which
any such share of Common Stock has been issued or sold or is deemed to have been
issued or sold.

                  6C. Effect on Conversion  Price of Certain Events.  Solely for
purposes of determining  the adjusted  Conversion  Price under paragraph 6B, the
following shall be applicable:

                  (i) Issuance of Rights or Options.  If the  Corporation in any
manner grants any Options and the lowest price per share for which any one share
of  Common  Stock is  issuable  upon the  exercise  of any such  Option  or upon
conversion or exchange of any  Convertible  Security is less than any Conversion
Price in effect  immediately  prior to the time of the  granting of such Option,
then such share of Common  Stock shall be deemed to have been issued and sold by
the  Corporation  at the time of the granting of such Options for such price per
share and such  Conversion  Price shall be adjusted in accordance with paragraph
6B(ii) above.  For purposes of this  paragraph,  the "lowest price per share for
which any one share of Common  Stock is  issuable"  shall be equal to the sum of
the lowest  amounts of  consideration  (if any)  received or  receivable  by the
Corporation  with  respect to any one share of Common Stock upon the granting of
the Option,  upon exercise of the Option and upon  conversion or exchange of the
Convertible  Security.  No further  adjustment of such Conversion Price shall be
made upon the actual issue of such Common Stock or of such Convertible  Security
upon the  exercise of such Options or upon the actual issue of such Common Stock
upon conversion or exchange of such Convertible Security.

                  (ii) Issuance of Convertible Securities. If the Corporation in
any manner  issues or sells any  Convertible  Security  and the lowest price per
share for which any one share of Common  Stock is issuable  upon  conversion  

                                      -11-
<PAGE>

or  exchange  thereof is less than any  Conversion  Price in effect  immediately
prior to the time of such issue or sale,  then such share of Common  Stock shall
be deemed to have been  issued  and sold by the  Corporation  at the time of the
issuance  or sale of such  Convertible  Securities  for such price per share and
such  Conversion  Price shall be adjusted in accordance  with  paragraph  6B(ii)
above. For the purposes of this paragraph, the "lowest price per share for which
any one  share of  Common  Stock is  issuable"  shall be equal to the sum of the
lowest  amounts  of  consideration  (if  any)  received  or  receivable  by  the
Corporation  with  respect to any one share of Common Stock upon the issuance of
the Convertible Security and upon the conversion or exchange of such Convertible
Security.  No further adjustment of such Conversion Price shall be made upon the
actual issue of such Common Stock upon conversion or exchange of any Convertible
Security,  and if any such issue or sale of such  Convertible  Security  is made
upon exercise of any Options for which  adjustments of such Conversion Price had
been or are to be made  pursuant  to  other  provisions  of this  Section  6, no
further  adjustment  of such  Conversion  Price  shall be made by reason of such
issue or sale.

                  (iii)  Change  in  Option  Price or  Conversion  Rate.  If the
purchase price provided for in any Option, the additional consideration (if any)
payable upon the issue,  conversion or exchange of any Convertible  Security, or
the rate at which any Convertible  Security is convertible  into or exchangeable
for Common Stock change at any time, any Conversion  Price  previously  adjusted
with respect to such Option or Convertible Security and in effect at the time of
such change shall be readjusted to the Conversion Price which would have been in
effect at such time had such Option or Convertible  Security originally provided
for such changed purchase price, additional  consideration or changed conversion
rate, as the case may be, at the time initially granted, issued or sold.

                  (iv) Treatment of Expired Options and Unexercised  Convertible
Securities. Upon the expiration of any Option or the termination of any right to
convert or exchange any  Convertible  Security  without the exercise of any such
Option or right, any Conversion Price then in effect hereunder shall be adjusted
to the  Conversion  Price  which  would  have been in effect at the time of such
expiration or termination had such Option or Convertible Security, to the extent
outstanding  immediately  prior to such  expiration or  termination,  never been
issued.

                  (v)  Calculation  of  Consideration  Received.  If any  Common
Stock,  Option or Convertible  Security is issued or sold or deemed to have been
issued or sold for cash, the consideration  received therefor shall be deemed to
be the amount  received by the Corporation  therefor.  In case any Common Stock,
Options or Convertible  Securities are issued or sold for a consideration  other
than cash,  the amount of the  consideration  other  than 

                                      -12-
<PAGE>

cash received by the Corporation shall be the fair value of such  consideration,
except where such consideration consists of securities, in which case the amount
of consideration  received by the Corporation  shall be the Market Price thereof
as of the date of receipt. If any Common Stock,  Option or Convertible  Security
is  issued to the  owners of the  non-surviving  entity in  connection  with any
merger in which the  Corporation  is the  surviving  corporation,  the amount of
consideration  therefor  shall be deemed to be the fair value of such portion of
the assets and business of the  non-surviving  entity as is attributable to such
Common Stock,  Options or Convertible  Securities,  as the case may be. The fair
value of any  consideration  other than cash and securities  shall be determined
jointly by the Corporation  and the holders of 70% of the outstanding  Preferred
Shares. If such parties are unable to reach agreement within a reasonable period
of  time,  the fair  value  of such  consideration  shall  be  determined  by an
independent  appraiser experienced in valuing such type of consideration jointly
selected by the Corporation and the holders of 70% of the outstanding  Preferred
Shares.  The determination of such appraiser shall be final and binding upon the
parties,  and the  fees and  expenses  of such  appraiser  shall be borne by the
Corporation.

                  (vi) Integrated Transactions.  In case any Option is issued in
connection  with  the  issue  or sale of other  securities  of the  Corporation,
together   comprising   one   integrated   transaction   in  which  no  specific
consideration  is  allocated to such Option by the parties  thereto,  the Option
shall be deemed to have been issued for a consideration of $.01.

                  (vii)  Treasury  Shares.  The number of shares of Common Stock
outstanding  at any given time does not include  shares  owned or held by or for
the account of the  Corporation or any  Subsidiary,  and the  disposition of any
shares so owned or held shall be considered an issue or sale of Common Stock.

                  (viii) Record Date. If the Corporation fixes a record date for
determining  the holders of Common  Stock  entitled (a) to receive a dividend or
other distribution payable in Common Stock, Options or in Convertible Securities
or (b) to  subscribe  for or  purchase  Common  Stock,  Options  or  Convertible
Securities, then such record date shall be deemed to be the date of the issue or
sale of the shares of Common  Stock  deemed to have been issued or sold upon the
declaration  of such dividend or upon the making of such other  distribution  or
the date of the granting of such right of subscription or purchase,  as the case
may be.

                  6D.  Subdivision  or  Combination  of  Common  Stock.  If  the
Corporation  at any  time  subdivides  (by  any  stock  split,  stock  dividend,
recapitalization  or otherwise) one or more classes of its outstanding shares of

                                      -13-
<PAGE>

Common Stock into a greater  number of shares,  any  Conversion  Price in effect
immediately prior to such subdivision shall be proportionately  reduced,  and if
the  Corporation  at any time combines (by reverse stock split or otherwise) one
or more classes of its outstanding  shares of Common Stock into a smaller number
of shares,  any Conversion Price in effect immediately prior to such combination
shall be proportionately increased.

                  6E. Reorganization, Reclassification, Consolidation, Merger or
Sale.  In  connection  with any  Organic  Change,  the  Corporation  shall  make
appropriate  provisions (in form and substance  reasonably  satisfactory  to the
holders of 70% of the Preferred Shares then  outstanding) to insure that each of
the holders of Preferred  Stock shall  thereafter  have the right to acquire and
receive,  in lieu of or in addition to (as the case may be) the shares of Common
Stock immediately  theretofore  acquirable and receivable upon the conversion of
such holder's  Preferred  Stock,  such shares of stock,  securities or assets as
such holder would have received in connection  with such Organic  Change if such
holder had  converted  its  Preferred  Stock  immediately  prior to such Organic
Change.  In  each  such  case,  the  Corporation  shall  also  make  appropriate
provisions (in form and substance reasonably  satisfactory to the holders of 70%
of the Preferred Shares then  outstanding) to insure that the provisions of this
Section 6 and  Sections 7 and 8 hereof shall  thereafter  be  applicable  to the
Preferred Stock  (including,  in the case of any such  consolidation,  merger or
sale in which the  successor  entity  or  purchasing  entity  is other  than the
Corporation,  an immediate  adjustment of the Conversion  Price to the value for
the Common Stock reflected by the terms of such  consolidation,  merger or sale,
and a corresponding immediate adjustment in the number of shares of Common Stock
acquirable and receivable  upon  conversion of Preferred  Stock, if the value so
reflected is less than the Conversion Price in effect  immediately prior to such
consolidation, merger or sale).

                  6F.  Certain   Events.   If  any  event  occurs  of  the  type
contemplated by the provisions of this Section 6 but not expressly  provided for
by such  provisions  (including,  without  limitation,  the  granting  of  stock
appreciation rights, phantom stock rights or other rights with equity features),
then the Corporation's  board of directors shall make an appropriate  adjustment
in each Conversion Price so as to protect the rights of the holders of Preferred
Stock;  provided that no such adjustment  shall increase any Conversion Price as
otherwise determined pursuant to this Section 6 or decrease the number of shares
of Conversion Stock issuable upon conversion of each share of Preferred Stock.

                                      -14-
<PAGE>

                  6G.      Notices.
                           -------
                  (i) Immediately  upon any adjustment of the Conversion  Price,
the  Corporation  shall give written  notice thereof to all holders of Preferred
Stock, setting forth in reasonable detail and certifying the calculation of such
adjustment.

                  (ii) The Corporation  shall give written notice to all holders
of Preferred  Stock at least 20 days prior to the date on which the  Corporation
closes  its books or fixes a record  date (a) with  respect to any  dividend  or
distribution  upon Common Stock,  (b) with respect to any pro rata  subscription
offer to  holders  of Common  Stock or (c) for  determining  rights to vote with
respect to any Organic Change or Liquidation.

                  (iii) The  Corporation  shall also give written  notice to the
holders  of  Preferred  Stock at least  20 days  prior to the date on which  any
Organic Change shall take place.

                  6H.  Mandatory  Conversion.  The  Corporation  may  require by
written notice to all holders of Preferred  Stock,  the conversion of all of the
outstanding Preferred Stock at the then applicable Conversion Price, at any time
after the second anniversary of the Closing, provided that (a) the Closing Price
of the Common Stock (adjusted proportionately for stock dividends, stock splits,
combinations,  and  similar  changes in the  Common  Stock  occurring  after the
Closing) on at least 30 of the 45 latest  trading days preceding the date of the
Corporation's  notice has been greater than (i) $12.50 per share, if such notice
is delivered prior to the last day of the 30th month after Closing,  (ii) $15.62
per  share,  if such  notice is  delivered  after the last day of the 30th month
after Closing but prior to the third anniversary of the Closing, or (iii) $18.75
per share, if such notice is delivered on or after the third  anniversary of the
Closing,  (b) the number of Public Float Securities  outstanding  exceeds 20% of
the number of shares of Common  Stock  outstanding  on a  "fully-diluted"  basis
(i.e.,  after giving  effect to the exercise,  exchange  arid  conversion of all
rights,  options,  warrants and  convertible  securities  that are,  directly or
indirectly,  exercisable or exchangeable for, or convertible into, Common Stock,
determined  without  regard  to  any  vesting  limitations  or  restrictions  on
exercise,  exchange or  conversion),  and (c) the holders of the Preferred Stock
are not then  subject  to (and will not,  as a result of such  exercise,  become
subject to) any agreement  restricting  the sale of the Common Stock issued upon
the conversion of the Preferred Stock.

                  Section 7.        Liquidation Dividends.
                                    ---------------------

                  If the  Corporation  declares or pays a  Liquidating  Dividend
upon the  Common  Stock,  then  the  Corporation  shall  pay to the  holders  of
Preferred Stock at the time of payment  thereof the Liquidating  Dividends which
would 

                                      -15-
<PAGE>

have been paid on the shares of Common Stock had such Preferred Stock been
converted  immediately  prior to the  record  date  fixed  for  determining  the
stockholders entitled to receive payment of such Liquidating Dividend, or, if no
record date is fixed,  the date as of which the record  holders of Common  Stock
entitled to such dividends are to be determined.

                  Section 8.        Purchase Rights.
                                    ---------------

                  If at any time the  Corporation  grants,  issues  or sells any
Purchase  Rights  pro rata to the record  holders of any class of Common  Stock,
then each holder of Preferred Stock shall be entitled to acquire, upon the terms
applicable to such Purchase  Rights,  the aggregate  Purchase  Rights which such
holder  could  have  acquired  if such  holder  had held the number of shares of
Common Stock  acquirable  upon  conversion  of such  holder's  Preferred  Shares
immediately  before the date on which a record is taken for the grant,  issuance
or sale of such Purchase Rights,  or, if no such record is taken, the date as of
which the record  holders of Common  Stock are to be  determined  for the grant,
issue or sale of such Purchase Rights.

                  Section 9. Consequences of Certain Events of Noncompliance.
                             -----------------------------------------------

                  (i) If an Event of  Noncompliance  of the  type  described  in
subparagraph  (ii) of the definition of Event of Noncompliance  has occurred and
has  continued  for a period of 30 days and is  continuing or any other Event of
Noncompliance  has occurred and is continuing,  the annual  dividend rate on the
Preferred  Stock shall  increase  immediately  by an increment of two percentage
points,  Thereafter,  until such time as no Event of Noncompliance  exists,  the
annual dividend rate shall increase  automatically at the end of each succeeding
90-day period by an  additional  increment of two  percentage  points (but in no
event shall the annual  dividend rate exceed 14%).  Any increase of the dividend
rate resulting from the operation of this  paragraph  shall  terminate as of the
close of business on the date on which no Event of Noncompliance exists, subject
to subsequent increases pursuant to this paragraph.

                  (ii) If both (a) either (1) an Event of  Noncompliance  of the
type  described  in  subparagraph  (i) or  (iii) of the  definition  of Event of
Noncompliance  has occurred and is continuing,  or (2) an Event of Noncompliance
of the type described in subparagraph (ii) or (iv) of the definition of Event of
Noncompliance  has  occurred  and has  continued  for a period of 60 days and is
continuing  and (b) the  holder or holders  of 70% of the  Preferred  Stock then
outstanding  have given  written  notice to the  Corporation  of their intent to
exercise their rights under this paragraph (ii) in connection with such Event of
Noncompliance  (which  notice may be given at any time after the  occurrence  of
such Event of Noncompliance)  and 30 days 

                                      -16-
<PAGE>

have lapsed since the date such notice was given,  then the holder or holders of
70% of the Preferred Stock then outstanding  shall have the option to demand (by
written notice  delivered to the Corporation at any time  thereafter  until such
time as there is no Event of  Noncompliance  in existence)  redemption of all or
any  portion of the  Preferred  Stock owned by such holder or holders at a price
per Preferred Share equal to the Liquidation Value thereof (plus all accrued and
unpaid dividends  thereon).  The Corporation shall give prompt written notice of
such election (or of any similar  election under paragraph 9(ii) of the Series A
Certificate)  to the other  holders of Preferred  Stock (but in any event within
five days after  receipt of the initial  demand for  redemption),  and each such
other holder shall have the option to demand redemption of all or any portion of
such  holder's   Preferred  Stock  by  giving  written  notice  thereof  to  the
Corporation  within seven days after receipt of the  Corporation's  notice.  The
Corporation  shall  redeem all  Preferred  Stock as to which  rights  under this
paragraph have been exercised within 15 days after receipt of the initial demand
for redemption.

                  (iii) If any Event of  Noncompliance  exists,  each  holder of
Preferred  Stock shall also have any other  rights which such holder is entitled
to under any  contract or  agreement at any time and any other rights which such
holder may have pursuant to applicable law.

                  Section 10.       Registration of Transfer.
                                    ------------------------

                  The Corporation  shall keep at its principal office a register
for the registration of Preferred  Stock.  Upon the surrender of any certificate
representing  Preferred  Stock at such  place,  the  Corporation  shall,  at the
request of the record  holder of such  certificate,  execute and deliver (at the
Corporation's  expense) a new certificate or  certificates in exchange  therefor
representing in the aggregate the number of Preferred Shares  represented by the
surrendered  certificate.  Each such new certificate shall be registered in such
name and shall represent such number of Preferred  Shares as is requested by the
holder of the surrendered  certificate and shall be  substantially  identical in
form to the surrendered certificate, and dividends shall accrue on the Preferred
Stock  represented by such new certificate from the date to which dividends have
been  fully  paid  on  such  Preferred  Stock  represented  by  the  surrendered
certificate.

                  Section 11.       Replacement.
                                    -----------

                  Upon  receipt  of  evidence  reasonably  satisfactory  to  the
Corporation (an affidavit of the registered holder shall be satisfactory) of the
ownership and the loss,  theft,  destruction  or  mutilation of any  certificate
evidencing Preferred Shares of any series of Preferred Stock, and in the case of
any such  loss,  theft or  destruction,  upon  receipt of  indemnity  reasonably

                                      -17-
<PAGE>

satisfactory  to the  Corporation  (provided  that if the holder is a  financial
institution  or  other  institutional  investor,  its  own  agreement  shall  be
satisfactory),  or, in the case of any such  mutilation  upon  surrender of such
certificate,  the Corporation shall (at its expense) execute and deliver in lieu
of such  certificate a new certificate of like kind  representing  the number of
Preferred Shares of such series represented by such lost,  stolen,  destroyed or
mutilated  certificate  and dated the date of such lost,  stolen,  destroyed  or
mutilated  certificate,  and  dividends  shall  accrue  on the  Preferred  Stock
represented by such new  certificate  from the date to which dividends have been
fully paid on such lost, stolen, destroyed or mutilated certificate.

                  Section 12.       Definitions.
                                    -----------
                  "Business  Day" means a day on which banks are generally  open
for business in New York City.

                  "Closing" means June 17, 1994.

                  "Closing  Price"  of each  share  of  Common  Stock  or  other
security  means the composite  closing price of the sales of the Common Stock or
such other  security on all  securities  exchanges on which such security may at
the time be listed (as  reported in The Wall Street  Journal),  or, if there has
been no sale on any such exchange on any day, the average of the highest bid and
lowest  asked  prices of the  Common  Stock or such other  security  on all such
exchanges  at the end of such day,  or, if such  security is not so listed,  the
closing  price (or last price,  if  applicable)  of sales of the Common Stock or
such other  security  in the Nasdaq  National  Market (as  reported  in The Wall
Street  Journal)  on such day,  or if such  security is not quoted in the Nasdaq
National Market but is traded  over-the-counter,  the average of the highest bid
and lowest asked prices on such day in the  over-the-counter  market as reported
by  the  National  Quotation  Bureau  Incorporated,  or  any  similar  successor
organization.

                  "Common Stock" means,  collectively,  the Corporation's common
stock,  par value  $0.01 per share,  and any  capital  stock of any class of the
Corporation  hereafter  authorized  which  is  not  limited  to a  fixed  sum or
percentage  of par or stated  value in  respect  to the  rights  of the  holders
thereof to  participate in dividends or in the  distribution  of assets upon any
Liquidation  of  the  Corporation;  and if  there  is a  change  such  that  the
securities  issuable upon  conversion  of the  Preferred  Stock are issued by an
entity  other  than  the  Corporation  or  there  is a  change  in the  class of
securities so issuable, then the term "Common Stock" shall mean one share of the
security  issuable upon  conversion  of the Preferred  Stock if such security is
issuable in shares,  or shall mean the smallest  unit in which such  security is
issuable if such security is not issuable in shares.

                                      -18-

<PAGE>

                  "Conversion  Price"  shall mean,  with respect to any Series B
Share,  $7.50  (subject  to  adjustment  as  provided  in  Section 6 for  events
occurring after its Date of Issuance).

                  "Convertible  Security" means any stock or other securities of
the Corporation convertible into or exchangeable for Common Stock.

                  "Corporation"  means  Orion  Newco  Services,  Inc. a Delaware
corporation.

                  "Date of Issuance," with respect to any Preferred Share, means
the date on  which  the  Corporation  initially  issues  such  Preferred  Share,
regardless of the number of times  transfer of such  Preferred  Share is made on
the stock records  maintained by or for the  Corporation  and  regardless of the
number of certificates which may be issued to evidence such Preferred Share.

                  "Dividend  Reference  Dates"  mean  August  31,  November  30,
February 28 and May 31 of each year.

                  "Excluded  Issuance"  means the issue or sale of (i) shares of
Common Stock in respect of any transaction described in paragraph 6D or pursuant
to the Old ONS Merger Agreement,  (ii) up to an aggregate of 2,203,960 shares of
Common  Stock  by the  Corporation  pursuant  to the  exercise  of  Options  and
Convertible Securities outstanding  immediately prior to the Closing at exercise
prices  that are  greater  than or equal to the  respective  exercise  prices in
effect as of Closing (as adjusted  pursuant to the terms of such  securities  to
give effect to stock  dividends  or stock splits or a  combination  of shares in
connection   with   a   recapitalization,   merger,   consolidation   or   other
reorganization occurring after the Closing), (iii) up to an aggregate of 150,000
shares of Common Stock by the  Corporation  for any purpose,  or (iv) Options to
acquire Common Stock by the Corporation  pursuant to a resolution of, or a stock
option  plan  approved  by a  resolution  of,  the  Board  of  Directors  of the
Corporation  (or  the  compensation  committee  thereof)  to  the  Corporation's
employees, the per share exercise price of which is greater than or equal to the
fair market  value of a share of Common Stock at the time such Option is issued,
as determined by the Board of Directors of the Corporation (or the  compensation
committee thereof).

                  "Event  of  Noncompliance"  means  and shall be deemed to have
occurred if:

                           (i) the  Corporation  fails  to make  any  redemption
         payment  with respect to the  Preferred  Stock which it is obligated to
         make hereunder,  whether or not such payment is legally  permissible or
         is prohibited by any agreement to which the Corporation is subject;


                                      -19-
<PAGE>

                           (ii) the  Corporation  breaches or otherwise fails to
         perform or observe any other  covenant or agreement set forth herein or
         in  the  Purchase  Agreement;   provided,   first,  that  no  Event  of
         Noncompliance  shall be deemed to have occurred under this subparagraph
         (ii) if the  Corporation  reasonably  establishes  that  the  Event  of
         Noncompliance  is not material to the  financial  condition,  operating
         results,  operations or assets of the Corporation and its Subsidiaries,
         taken as a whole, or to any holder's investment in the Preferred Stock;
         and  provided,  second,  that,  so  long as the  Corporation  commences
         promptly and continues to exercise  reasonable and diligent  efforts to
         cure  the  Event  of  Noncompliance  (if  cure is  possible)  within  a
         reasonable time after its occurrence,  the applicable grace periods set
         forth in paragraph (i) and in clause (a) of paragraph (ii) of Section 9
         shall be extended  with  respect to such Event of  Noncompliance  for a
         period of time  equal to the  period  during  which  such  efforts  are
         continuing;

                           (iii) any  representation,  warranty or certification
         by or on behalf of the Corporation  contained in the Purchase Agreement
         or required to be furnished to any holder of Preferred  Stock  pursuant
         to the  Purchase  Agreement  is false  or  misleading  in any  material
         respect  on the  date  made;  provided,  however,  that  any  Event  of
         Noncompliance  under this clause (iii) resulting from the delivery of a
         certification  that is made in good  faith  but is false or  misleading
         shall be  deemed to be cured  from and  after the date a  certification
         correcting the earlier false or misleading  certification  is delivered
         to the  holders of the  Preferred  Stock,  which  delivery  shall occur
         promptly   after  the  facts  or  events  that   caused  such   earlier
         certification   to  be  false  or   misleading   become  known  to  the
         Corporation; or

                           (iv)  the  Corporation  or any  Subsidiary  makes  an
         assignment  for the  benefit  of  creditors  or admits in  writing  its
         inability  to pay its debts  generally as they become due; or an order,
         judgment  or decree is  entered  adjudicating  the  Corporation  or any
         Subsidiary bankrupt or insolvent;  or any order for relief with respect
         to the  Corporation  or any  Subsidiary  is entered  under the  Federal
         Bankruptcy  Code; or the  Corporation  or any  Subsidiary  petitions or
         applies to any tribunal for the  appointment  of a custodian,  trustee,
         receiver or liquidator of the  Corporation  or any Subsidiary or of any
         substantial part of the assets of the Corporation or any Subsidiary, or
         commences  any  proceeding  (other than a proceeding  for the voluntary
         liquidation   and   dissolution  of  a  Subsidiary)   relating  to  the
         Corporation or any  Subsidiary  under any  bankruptcy,  reorganization,
         arrangement,   insolvency,   readjustment   of  debt,   dissolution  or
         liquidation  law  of  any   jurisdiction;   or  any  such  petition  or
         application 

                                      -20-
<PAGE>

         is filed, or any such proceeding is commenced,  against the Corporation
         or any Subsidiary and either (a) the Corporation or any such Subsidiary
         by  any  act  indicates  its  approval  thereof,   consent  thereto  or
         acquiescence therein or (b) such petition, application or proceeding is
         not dismissed within 60 days.

                  "Freely Tradeable  Securities" has the meaning given such term
in the Purchase Agreement.

                  "Fundamental  Change" has the  meaning  given such term in the
Purchase Agreement.

                  "Investment  Regulations"  means, as applicable,  Title III of
the Small  Business  Investment  Act of 1958,  as amended,  and the  regulations
promulgated  thereunder,  regulation  Y (Title 12, Code of Federal  Regulations,
Part  225)  under  Section  5(b) of the Bank  Holding  Company  Act of 1956,  as
amended,  or other similar laws or  regulations  governing a regulated  Person's
investment authority.

                  "Junior  Securities"  means Common Stock and any other capital
stock or other equity  securities  issued by the Corporation,  whether currently
existing or hereafter authorized or issued (other than Series A Preferred).

                  "Liquidation" means the liquidation, dissolution or winding up
of the Corporation;  provided, however, that neither the consolidation or merger
of the  Corporation  into or with any other entity or entities,  nor the sale or
transfer by the Corporation of all or any part of its assets,  nor the reduction
or the capital stock of the  Corporation,  shall be deemed to be a  liquidation,
dissolution or winding up of the Corporation.

                  Liquidating  Dividend"  means a dividend upon the Common Stock
payable otherwise than in cash out of earnings or earned surplus  (determined in
accordance with generally accepted accounting principles,  consistently applied)
except for a stock dividend payable in shares of Common Stock.

                  "Liquidation  Value" of any Preferred  Share shall be equal to
$1,000.

                  "Market Price" of each share of Common Stock or other security
means the Closing Price of such share or other security,  averaged over a period
of 21  days  consisting  of the  day as of  which  the  Market  Price  is  being
determined  and the 20  consecutive  Business  Days prior to such day. If during
this period such security is not listed on any  securities  exchange,  quoted in
the Nasdaq National Market, or quoted in the over-the-counter market, the Market
Price will be the fair value of such security  determined  

                                      -21-
<PAGE>

by  agreement  between the  Company  and the  holders of 70% of the  outstanding
Preferred  Shares.  If such  parties  are  unable  to reach  agreement  within a
reasonable  period of time,  the fair value of such security shall be determined
by an independent  appraiser  experienced in valuing such type of  consideration
jointly  selected by the  Corporation  and the holders of 70% of the outstanding
Preferred Shares. The determination of such appraiser shall be final and binding
upon the parties,  and the fees and expenses of such appraiser shall be borne by
the Corporation.

                  "Old ONS"  means  Orion  Network  Systems,  Inc.,  a  Delaware
Corporation incorporated in 1982.

                  "Old ONS Merger  Agreement"  means the  Agreement  and Plan of
Merger dated as of January 8, 1997,  by and among the  Corporation,  Old ONS and
Orion Merger Company, Inc.

                  "Old ONS Preferred Share" means one (1) share of the series of
the preferred  stock of Old ONS having the  designation  "Series B 8% Cumulative
Redeemable   Convertible   Preferred  Stock,"  as  set  forth  in  that  certain
"Certificate of  Designations,  Rights and Preferences of Series B 8% Cumulative
Redeemable  Convertible  Preferred Stock of Orion Network  Systems,  Inc." filed
with the Secretary of State of the State of Delaware on June 16, 1995.

                  "Old ONS Preferred Share  Conversion"  means the conversion of
Old ONS Preferred Shares into the right to receive Preferred Shares, pursuant to
the Old ONS Merger Agreement.

                  "Options"  means any right or  option to  subscribe  for or to
purchase Common Stock or any Convertible Securities.

                  "Organic Change" means any  recapitalization,  reorganization,
reclassification,  consolidations,  merger,  sale of all or substantially all of
the  Corporation's  assets  to  another  Person  or other  transaction  which is
effected in such a manner that  holders of Common  Stock are entitled to receive
(either  directly or upon subsequent  liquidation)  stock,  securities or assets
with respect to or in exchange for Common Stock.

                  "Person" means an individual, a partnership, a corporation, an
association,  a joint stock company,  a limited  liability  company,  a trust, a
joint venture,  an unincorporated  organization and a governmental entity or any
department, agency or political subdivision thereof.

                  "Preferred Share" means a share of Series B Preferred.


                                      -22-
<PAGE>

                  "Preferred Stock" means the Series B Preferred.

                  "Public   Float   Securities"   means,   as  of  any  date  of
determination,   those  shares  of  the  Corporation's  Common  Stock  that  (i)
previously  have been sold to the  public in an  offering  registered  under the
Securities Act or through a broker, dealer or market maker under Rule 144 of the
Securities Act, (ii) are listed for trading on a "national  securities exchange"
(within  the  meaning of the  Securities  Exchange  Act of 1934,  as amended) or
quoted on the  "National  Market  System" or  "National  List"  published by the
National  Association of Securities  Dealers Automated  Quotations System or any
successor  list, and (iii) are held by Persons other than the Corporation or any
of its "affiliates" (within the meaning of Rule 144 under the Securities Act).

                  "Public Offering" means any offering by the Corporation of its
equity securities to the public pursuant to an effective  registration statement
under the Securities Act of 1933, as then in effect, or any comparable statement
under  any  similar  federal  statute  then in  force;  provided,  that  "Public
Offering"  shall not  include an  offering  made in  connection  with a business
acquisition or combination or an employee benefit plan.

                  "Purchase Agreement" means the Purchase Agreement, dated as of
June 15, 1995, by and among Old ONS and certain investors, as such agreement may
from time to time be amended in accordance  with its terms,  the  performance of
Old ONS's  obligations  under which the Corporation  has assumed  pursuant to an
agreement dated as of ___________, 199__, by and among Old ONS, the Corporation,
and such investors.

                  "Purchase Rights" mean any Options,  Convertible Securities or
rights to purchase stock, warrants, securities or other property.

                  "Redemption Date" means the date on which the Redemption Price
of a Preferred Share is paid to the holder thereof.

                  "Redemption  Price" means, with respect to any Preferred Share
being redeemed,  the Liquidation  Value of such Preferred Share plus all accrued
and unpaid dividends thereon.

                  "Reorganization"  means  any  merger or  consolidation  of the
Corporation with any Person where both (i) either (a) the Corporation is not the
surviving  corporation,  (b) the terms of the Preferred Stock are altered in any
respect,  or (c) the Preferred Stock is exchanged for cash,  securities or other
property,   and  (ii)  such  merger  or  consolidation  does  not  constitute  a
Fundamental Change.

                  "Securities Act" means the Securities Act of 1933, as amended.


                                      -23-
<PAGE>

                  "Series A Certificate"  means the Certificate of Designations,
Rights and Preferences for the Series A Preferred.

                  "Series  A  Preferred"  means  the  Corporation's  Series A 8%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series  B  Preferred"  means  the  Corporation's  Series B 8%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series A Share" means a share of Series A Preferred.

                  "Series B Share" means a share of Series B Preferred.

                  "Subsidiary"   means,   with   respect  to  any  Person,   any
corporation, partnership, association or other business entity of which (i) if a
corporation,  a majority of the total voting  power of shares of stock  entitled
(without regard to the occurrence of any contingency) to vote in the election of
directors,  managers  or  trustees  thereof is at the time owned or  controlled,
directly or indirectly,  by that Person or one or more of the other Subsidiaries
of that Person or a combination  thereof, or (ii) if a partnership,  association
or other  business  entity,  a  majority  of the  partnership  or other  similar
ownership  interest  thereof is at the time  owned or  controlled,  directly  or
indirectly,  by any  Person  or one or more  Subsidiaries  of that  person  or a
combination thereof. For purposes hereof, a Person or Persons shall be deemed to
have a  majority  ownership  interest  in a  partnership,  association  or other
business  entity if such  Person or Persons  shall be  allocated  a majority  of
partnership, association or other business entity gains or losses or shall be or
control a general  partner of such  partnership,  association  or other business
entity.   Without  limiting  the  foregoing,   International  Private  Satellite
Partners,  L.P.,  a  Delaware  limited  partnership,  shall  be  deemed  to be a
Subsidiary of the Corporation for so long as the Corporation or any of its other
Subsidiaries is the general partner thereof.

                  "Warrants"  means the Common Stock  purchase  warrants  issued
pursuant  to the  Purchase  Agreement  (whether  at the  Closing  or  thereafter
pursuant  to  paragraph  ID or  Section 7  thereof)  and any  warrant  issued in
exchange, substitution or replacement thereof.

                  Section 13.       Amendment and Waiver.
                                    --------------------

                  No  amendment,  modification  or waiver  shall be  binding  or
effective  with respect to any provision of Sections 1 to 13 hereof  without the
prior written consent of the holders of 70% of the Preferred Shares  outstanding
at the time such action is taken; provided, that no such action 

                                      -24-
<PAGE>


shall  change  (i) the rate at which or the  manner  in which  dividends  on the
Preferred  Stock accrue or the times at which such  dividends  become payable or
the amount  payable on redemption  of the Preferred  Stock or the times at which
redemption of Preferred Stock is to occur,  without the prior written consent of
the holders of at least 90% of the Preferred Shares then  outstanding,  (ii) any
Conversion  Price of the  Preferred  Stock or the  number  of shares or class of
stock into which the Preferred Stock is  convertible,  without the prior written
consent of the holders of at least 90% of the Preferred  Stock then  outstanding
or (iii) the  percentage  required to approve any change in clauses (i) and (ii)
above,  without the prior written  consent of the holders of at least 90% of the
Preferred Stock then outstanding.

                  Section 14.       Notices.
                                    -------
                  Except as otherwise expressly provided hereunder,  all notices
referred to herein shall be in writing and shall be delivered by  registered  or
certified mail,  return receipt  requested and postage prepaid,  or by reputable
overnight  courier service,  charges  prepaid,  and shall be deemed to have been
given when so mailed or sent (i) to the Corporation,  at its principal executive
offices and (ii) to any  stockholder,  at such holder's address as it appears in
the stock records of the  Corporation  (unless  otherwise  indicated by any such
holder).










                                      -25-
<PAGE>
 
                                                                       EXHIBIT B

                          CERTIFICATE OF DESIGNATIONS,

                             RIGHTS AND PREFERENCES

                                       OF

                        SERIES C 6% CUMULATIVE REDEEMABLE

                           CONVERTIBLE PREFERRED STOCK

                                       OF

                           ORION NEWCO SERVICES, INC.


- --------------------------------------------------------------------------------
                             Pursuant to Section 151
                         of the General Corporation Law
                            of the State of Delaware
- --------------------------------------------------------------------------------



         The  undersigned  DOES HEREBY  CERTIFY that,  pursuant to the authority
contained in Article FOURTH of the Certificate of  Incorporation  of Orion Newco
Services,  Inc., a Delaware corporation (the  "Corporation"),  and in accordance
with Section 151 of the General  Corporation  Law of the State of Delaware,  the
Board of Directors of the Corporation has authorized the creation of a series of
Preferred Stock of the Corporation having the designation Series C 6% Cumulative
Redeemable  Convertible  Preferred  Stock and  having  the  powers,  rights  and
preferences,  and the qualifications,  limitations and restrictions  thereof, as
are set forth in Exhibit A hereto and made a part hereof and that the  following
resolution was duly adopted by the Board of Directors of the Corporation:

                           RESOLVED,  that  a  series  of  authorized  Preferred
                  Stock,  par value $0.01 per share,  of the Corporation be, and
                  it hereby is,  created;  that the shares of such series  shall
                  be, and they hereby are, designated as "Series C 6% 

<PAGE>

                  Cumulative  Redeemable  Convertible Preferred Stock;" that the
                  number of shares  constituting  such  series  shall be, and it
                  hereby is, fixed at _______,000;  and that the powers,  rights
                  and  preferences  and  the  qualifications,   limitations  and
                  restrictions  thereof, of the shares of such series are as set
                  forth in Exhibit A attached hereto and made a part hereof.

         IN WITNESS WHEREOF, the Corporation has caused its corporate seal to be
hereunto  affixed and this  Certificate  to be signed by its President and Chief
Executive  Officer and attested to by its Vice  President,  Corporate  and Legal
Affairs, and Secretary this ____ day of __________, 1996.

                                              ORION NEWCO SERVICES, INC.


                                              By:
                                                  ------------------------------
[SEAL]                                        Name:    W. Neil Bauer
                                              Title:   President/Chief Executive
                                                        Officer


ATTEST:


- -----------------------------------------
Name:      Richard H. Shay, Esq.
Title:     Vice President, Corporate and
              Legal Affairs/Secretary

                                      -2-

<PAGE>
                                                                       EXHIBIT A
                                                                       ---------



                        SERIES C 6% CUMULATIVE REDEEMABLE
                           CONVERTIBLE PREFERRED STOCK

                  The  following  sections  set forth  the  powers,  rights  and
preferences,  and the qualifications,  limitations and restrictions  thereof, of
the Corporation's Series C 6% Cumulative Redeemable Convertible Preferred Stock.
Capitalized terms used herein are defined in Section 10 below.

                  Section 1.        Dividends.
                                    ---------

                  1A. General Obligation.  Subject to the preferential rights of
Series A  Preferred  Stock or Series B  Preferred  Stock  ranking  senior to the
Preferred  Stock,  the record  holders of  Preferred  Stock shall be entitled to
receive  dividends,  when,  as and if  declared  by the  Corporation's  board of
directors  (the  "Board")  and  to  the  extent   permitted  under  the  General
Corporation Law of Delaware,  as amended, as provided in this Section 1, subject
to paragraph 1F.  Dividends shall accrue on a daily basis commencing on the Date
of Issuance of each Preferred  Share at the simple interest rate of 6% per annum
of the Liquidation Value thereof,  and shall be payable as provided in paragraph
1B. Dividends shall cease accruing upon the earliest to occur of (i) the date on
which the  Liquidation  Value of such Preferred  Share is paid, (ii) the date on
which such Preferred  Share is converted into shares of Common Stock  hereunder,
or (iii) the Maturity Date. Such dividends shall accrue whether or not they have
been  declared and whether or not there are net profits,  surplus or other funds
of the Corporation legally available for the payment of dividends.

                  1B.  Payment  of  Dividends.  Subject  to  the  provisions  of
paragraph 1A and paragraph 1F, dividends shall be payable, in arrears, following
each Dividend  Reference  Date within twenty days after such Dividend  Reference
Date.  The amount of the  dividend  on each  share of  Preferred  Stock  payable
following each Dividend  Reference Date shall equal the aggregate  amount of all
accrued and unpaid  dividends  on such share of  Preferred  Stock from the Prior
Dividend  Date (or, in the case of the first  dividend paid with respect to such
share,  the Date of Issuance of such  Preferred  Share)  through  such  Dividend
Reference  Date. To the extent any dividend is not paid within twenty days after
a Dividend Reference Date, all dividends which have accrued and remain unpaid on
each outstanding  Preferred Share through such Dividend  Reference Date shall be
accumulated  and  shall  remain  accumulated  dividends  with  respect  to  such
Preferred  Share until the date paid.  No interest,  dividend or sum of money in
lieu of  interest,  shall be  payable  in  respect  of any  dividend  payment or
payments that may be accrued and unpaid.


<PAGE>


                  1C.  Distribution  of  Partial  Dividend  Payments.  Except in
connection with redemptions or repurchases pursuant to paragraph 3A or 3B below,
if at any time the Corporation pays less than the total amount of dividends then
accrued with respect to the Preferred  Stock such payment  shall be  distributed
ratably among the holders  thereof  based upon the aggregate  accrued but unpaid
dividends  on the  Preferred  Shares held by each such  holder and such  payment
shall be applied first to dividends which have accrued on such Preferred  Shares
during the period since the latest preceding  Dividend Reference Date and second
to reduce any  previously  accumulated  dividends with respect to such Preferred
Shares.

                  1D.   Payment  of  Dividends  in  Common   Stock.   Except  as
specifically  provided  herein,  the  Corporation  shall pay all dividends  with
respect to the Preferred  Stock  (including,  in the case of a  redemption,  any
amount  equal to accrued  and  unpaid  dividends  constituting  a portion of the
Redemption Price) in fully paid and  non-assessable  shares of Common Stock. The
number of shares of Common  Stock  distributable  in a dividend on each share of
Preferred  Stock shall be equal to the  quotient  obtained  by dividing  (a) the
amount of such dividend,  as determined under paragraph 1B, by (b) the higher of
(i) the  Market  Price  of the  Common  Stock  on the  Dividend  Reference  Date
immediately  preceding  the  dividend  payment and (ii) the Series A/B  Dilution
Price.  When the Corporation  pays a dividend to the holders of Preferred Stock,
the Corporation  shall provide each holder of Preferred Stock with a calculation
of the  aggregate  number of shares of Common  Stock  payable in such  dividend,
including the computation of the Market Price.  If any fractional  interest in a
share of Common Stock would,  except for the  provisions  of this  sentence,  be
deliverable  upon  payment  of any  dividend  in  shares of  Common  Stock,  the
Corporation,  in lieu of delivering the fractional share therefor,  shall pay an
amount  to the  holder  thereof  equal to the  Market  Price of such  fractional
interest, calculated as set forth above in this paragraph 1D.

                  1E. Dividends on Junior Securities.  The Corporation shall not
declare and pay any dividends on Junior Securities unless all accrued and unpaid
dividends on the Preferred Stock have been paid in full.

                  1F. Certain Withholding Provisions.  Notwithstanding any other
provision of Section 1, and without limiting the generality of the Board's power
and authority  with respect to the  declaration  and payment of  dividends,  the
Board shall have and may  exercise  the power and  authority to provide that the
receipt  by each  record  holder of  Preferred  Shares  entitled  thereto of any
dividend  paid by the  Corporation  as  declared  on the issued and  outstanding
Preferred Shares shall be subject to the condition (the "Tax Payment Condition")
that the  Corporation  receive,  at or prior  to the  time for  payment  of such
dividend (the "Payment Time"), from or on behalf of such record holder,  payment
in full of the taxes, fees, duties,  assessments,  or other amounts, if any (the
"Tax"), that the Corporation is required under applicable law to pay or withhold
in  connection  with the  declaration  and payment to such record holder of such
dividend.  If the Tax Payment Condition  

                                      -2-
<PAGE>

applies and has been satisfied,  or has been duly waived by the Corporation,  at
or prior to the Payment Time, at the Payment Time the Corporation shall pay such
dividend to such record holder. If the Tax Payment Condition applies but has not
been satisfied, and has not been duly waived by the Corporation,  at or prior to
the Payment Time, at the Payment Time the Corporation  shall pay the dividend to
which such record holder is entitled by irrevocably depositing and setting aside
such  dividend  with the  Secretary  of the  Corporation  as escrow  holder (the
"Escrow Holder").  Upon the Escrow Holder's  receipt,  from or on behalf of such
record  holder,  of payment in full of the Tax, plus any interest,  penalty,  or
additional amount to be paid or withheld as a result of the passage of time from
and after the Payment Time (the "Escrow  Termination  Time"),  the Escrow Holder
shall  release such  dividend to such record  holder and shall release such Tax,
and such additional amount if any, to the Corporation.  If such dividend is paid
in shares of Common Stock and is not received at or prior to the Payment Time by
the  record  holder of  Preferred  Shares  entitled  to  payment  thereof,  then
(notwithstanding  any  provision  hereof  to  the  contrary)  until  the  Escrow
Termination Time (and only until such time, whether or not the dividend has been
released by the Escrow Holder), such record holder shall not be entitled to vote
such shares of Common Stock for any purpose,  to receive payment of dividends or
other  distributions  on such shares of Common  Stock,  or to exercise any other
rights or privileges  in respect of such shares of Common Stock,  and the Escrow
Holder  shall have no right to vote such  shares of Common  Stock or to exercise
any other right or privilege in respect thereof  (whether in accordance with the
wishes or directions of such record holder or otherwise),  but the Escrow Holder
shall receive and hold in escrow until the Escrow Termination Time together with
such shares of Common Stock any dividends  paid or other  distributions  made on
such shares of Common  Stock and at the Escrow  Termination  Time shall  release
such dividends paid or other  distributions made on such shares of Common Stock,
if any, along with such shares of Common Stock.

                  Section 2.        Liquidation.
                                    -----------

                  Subject to the provisions of Section 2 of each of the Series A
Certificate and the Series B Certificate:  upon any Liquidation,  each holder of
Preferred Stock shall be entitled to be paid, before any distribution or payment
is made upon any Junior  Securities,  an amount in cash equal to the  greater of
(a) the  aggregate  Liquidation  Value (plus an amount  equal to all accrued and
unpaid  dividends)  of all shares of Preferred  Stock held by such holder or (b)
the amount which would be distributed with respect to the shares of Common Stock
(including  fractional  shares for purposes of this calculation) into which such
shares  of  Preferred  Stock  are  convertible   (assuming   conversion  of  all
outstanding  Preferred  Stock)  immediately  prior to the  record  date for such
distribution (or, if there is no such record date, then the date as of which the
holders of Common Stock entitled to such  distribution are determined),  and the
holders of Preferred Stock shall not be entitled to any further payment;  and if
upon any such Liquidation the  Corporation's  assets to be distributed among the
holders  of the  Preferred  Stock are  insufficient  to permit  

                                      -3-
<PAGE>

payment to such  holders of the  aggregate  amount which they are entitled to be
paid,  then the entire assets to be  distributed  shall be  distributed  ratably
among such holders based upon the aggregate  Liquidation Value (plus all accrued
and unpaid dividends) of the Preferred Shares held by each such holder. Prior to
such Liquidation, the Corporation shall (to the extent permitted by law) declare
for  payment  all accrued and unpaid  dividends  with  respect to the  Preferred
Stock, which dividends shall be payable in cash  notwithstanding  the provisions
of paragraph 1D. (Payment of the greater of the amounts specified in clauses (a)
and (b) of this Section 2 in respect of such Preferred  Shares shall  constitute
payment of such declared  dividends.) The Corporation  shall mail written notice
of such  Liquidation,  not less than 60 days prior to the  payment  date  stated
therein, to each record holder of Preferred Stock.

                  Section 3.        Redemptions.
                                    -----------

                  3A.  Redemption at the Maturity Date. At the Maturity Date the
Corporation  shall redeem all of the  Preferred  Shares then  outstanding  for a
price equal to the Redemption  Price.  The Corporation  shall pay the Redemption
Price for the  Preferred  Shares within thirty (30) days after the Maturity Date
(or such later date upon which the certificates  evidencing the Preferred Shares
are surrendered to the Corporation).

                  3B.  Redemption at the Option of the Corporation.  At any time
after the Initial  Redemption Date, or, if prior to the Initial Redemption Date,
immediately  prior to the consummation of any  consolidation,  merger or sale in
which the successor  entity or purchasing  entity is other than the Corporation,
to the extent that it has funds legally sufficient therefor, the Corporation may
redeem all or, subject to the last sentence of this paragraph,  a portion of the
Preferred  Shares  then  outstanding  for the  Redemption  Price.  The number of
Preferred Shares to be redeemed from each holder thereof in a partial redemption
pursuant to this paragraph 3B shall be the number of Preferred Shares determined
by  multiplying  the  total  number of  Preferred  Shares  to be  redeemed  by a
fraction,  the  numerator  of  which  shall  be the  total  Redemption  Price of
Preferred  Shares then held by such holder and the denominator of which shall be
the aggregate Redemption Price of Preferred Shares then outstanding.

                  3C. Redemption  Payment.  For each Preferred Share which is to
be redeemed,  the Corporation  shall be obligated to pay the Redemption Price to
the holder thereof on the  Redemption  Date or such later date upon which occurs
the  surrender  by such  holder  at the  Corporation's  principal  office of the
certificate  representing  such  Preferred  Share.  Subject to the provisions of
paragraph  4C of the  Series A  Certificate  and  paragraph  4C of the  Series B
Certificate,  if the funds of the Corporation  legally  available for payment of
the cash portion of the Redemption  Price of Preferred  Shares on any Redemption
Date are  insufficient  to pay the cash portion of the Redemption  Price for the
total number of Preferred  Shares to be 

                                      -4-
<PAGE>

redeemed on such date, those funds which are legally  available shall be used to
redeem the maximum  possible  number of such Preferred  Shares ratably among the
holders  of the  Preferred  Shares  to be  redeemed  based  upon  the  aggregate
Redemption  Price of the  Preferred  Shares  held by each  such  holder  and the
remaining Preferred Shares called for redemption will remain outstanding; and at
any time  thereafter  when  additional  funds  of the  Corporation  are  legally
available for the redemption of Preferred  Shares,  such funds shall immediately
be used to redeem the balance of the Preferred  Shares which the Corporation has
become obligated to redeem on any Redemption Date but which it has not redeemed.
Payment  of the  Redemption  Price in  respect of such  Preferred  Shares  shall
extinguish  all  rights  to  dividends  that are  accrued  and  unpaid as of the
Redemption Date with respect to the Preferred  Shares which are redeemed on such
Redemption Date.

                  3D. Notice of Redemption.  The Corporation  shall mail written
notice  of each  redemption  of any  Preferred  Stock to each  record  holder of
Preferred  Stock  not more  than 60 nor less  than 30 days  prior to the date on
which  such  redemption  is to be made  specifying  (a) the  number of shares of
Preferred Stock to be redeemed by the  Corporation and (b) the Redemption  Date.
Upon  mailing  any such  notice of  redemption,  the  Corporation  shall  become
obligated  to redeem the total  number of  Preferred  Shares  specified  in such
notice at the time of redemption  specified therein and upon the surrender on or
before such time of the certificates  representing such Preferred Shares. If one
or more holders of Preferred  Shares being  redeemed shall fail to surrender the
certificates  representing  such Preferred  Shares by the  Redemption  Date, the
Corporation shall pay the Redemption Price by irrevocably  depositing or setting
aside  the  required   amount  to  be  paid  promptly  upon  surrender  of  such
certificates.  Such  deposit  or  set  aside  shall  be  deemed  payment  of the
Redemption  Price to the holder for whom it is deposited  or set aside.  In case
fewer than the total number of Preferred  Shares  represented by any certificate
are redeemed, a new certificate  representing the number of unredeemed Preferred
Shares shall be issued to the holder thereof  without cost to such holder within
three Business Days after surrender of the certificate representing the redeemed
Preferred Shares.

                  3E.  Dividends after  Redemption Date. No Preferred Share that
is redeemed is entitled to any dividends  accruing after the Redemption Date. On
the  Redemption  Date of any Preferred  Share,  all rights of the holder of such
Preferred  Share shall cease,  and such Preferred Share shall be deemed to be no
longer outstanding.

                  3F.  Redeemed or  Otherwise  Acquired  Preferred  Shares.  Any
Preferred  Shares which are  redeemed,  converted  or otherwise  acquired by the
Corporation  thereupon  shall be  retired.  All such  shares  shall  upon  their
retirement  become  authorized  but unissued  shares of  preferred  stock of the
Corporation  and may not be reissued as  Preferred  Stock but may be reissued as
part  of a new  series  

                                      -5-
<PAGE>

of preferred  stock to be created by resolution or  resolutions  of the board of
directors,  subject to the conditions or  restrictions  on issuance set forth in
the certificate of incorporation of the Corporation.

                  Section 4.        Voting Rights.
                                    -------------

                  The holders of the Preferred Stock shall be entitled to notice
of all stockholders  meetings in accordance with the Corporation's  bylaws,  and
except as otherwise required by law, the holders of the Preferred Stock shall be
entitled  to  vote  on all  matters  submitted  to the  stockholders  for a vote
together with the holders of the Common Stock voting  together as a single class
with  each  share of  Common  Stock  entitled  to one vote per  share,  and each
Preferred  Share  (including  fractional  shares)  entitled to one vote for each
whole  share of Common  Stock that would be  issuable  upon  conversion  of such
Preferred Share at the time the vote is taken.

                  Section 5.        Conversion.

                  5A.      Conversion Procedure.
                           --------------------

                  (i) At any time  and  from  time to time  after  the  issuance
thereof,  any holder of Preferred  Stock may convert all or any of the Preferred
Shares  (including any fraction of a Preferred Share) held by such holder into a
number of shares of Common  Stock  equal to the sum of: (a) the number of shares
of Common Stock  computed by  multiplying  the number of Preferred  Shares to be
converted by the Liquidation Value of a Preferred Share, and dividing the result
by the Conversion Price then in effect,  plus (b) the number of shares of Common
Stock that would be payable if all accrued but unpaid  dividends  were  declared
and paid on the Preferred  Shares to be converted.  For purposes of  determining
the amount of  dividends  payable or that  would be  payable  with  respect to a
conversion  under Section 5, the date for  determining the Market Price shall be
the Business Day immediately preceding the date on which conversion is deemed to
have been effected.

                  (ii) Each  conversion  of  Preferred  Stock shall be deemed to
have  been  effected  as of the  close of  business  on the  date on  which  the
certificate or certificates  representing  the Preferred  Shares to be converted
have been surrendered at the principal office of the Corporation,  together with
written notice of the holder's desire to convert such Preferred  Shares. At such
time as such  conversion  has been  effected,  the  rights of the holder of such
Preferred  Shares as such holder shall cease, and the Person or Persons in whose
name or names any certificate or certificates  for shares of Common Stock are to
be issued  upon such  conversion  shall be deemed to have  become  the holder or
holders  of record of the  shares of Common  Stock  represented  thereby,  which
Common  Stock shall be deemed to have been  issued as of such time.  Issuance of
Common Stock by the  Corporation to effect any conversion  shall  extinguish all
rights  to  dividends  that  are  accrued  and  unpaid  as of the  date 

                                      -6-
<PAGE>

on which conversion is to be made with respect to the Preferred Shares which are
to be converted on such date.

                  (iii) The conversion  rights of any Preferred Share subject to
redemption  hereunder  shall terminate on the Redemption Date for such Preferred
Share  unless  the  Corporation  has  failed to pay to the  holder  thereof  the
Redemption Price thereof.

                  (iv)   Notwithstanding   any  other  provision  hereof,  if  a
conversion  of any Preferred  Shares is to be made in  connection  with a Public
Offering or prior to a redemption,  such  conversion may, at the election of the
holder of such Preferred  Shares,  be conditioned  upon the  consummation of the
Public  Offering or the redemption  occurring on or before a specified  date, in
which  case  such  conversion  shall not be  deemed  to be  effective  until the
consummation of the Public Offering or unless the redemption occurs on or before
the specified date.

                  (v) As soon as possible  after a conversion  has been effected
(but in any event within three  Business  Days in the case of  subparagraph  (a)
below), the Corporation shall deliver to the converting holder:

                  (a)      a certificate or certificates representing the number
                           of shares of Common Stock  issuable by reason of such
                           conversion   in  such   name  or   names   and   such
                           denomination  or   denominations  as  the  converting
                           holder has specified;

                  (b)      payment  of the  amount  payable  under  subparagraph
                           (viii) below with respect to such conversion; and

                  (c)      a certificate representing any Preferred Shares which
                           were  represented by the  certificate or certificates
                           delivered to the  Corporation in connection with such
                           conversion but which were not converted.

                  (vi) The issuance of  certificates  for shares of Common Stock
upon  conversion of Preferred  Stock shall be made without charge to the holders
of such  Preferred  Stock for any issuance tax in respect  thereof or other cost
incurred by the  Corporation in connection  with such conversion and the related
issuance of shares of Common Stock.

                  (vii) The  Corporation  shall not close its books  against the
transfer  of  Preferred  Stock  or of  Common  Stock  issued  or  issuable  upon
conversion  of Preferred  Stock in any manner which  interferes  with the timely
conversion of Preferred Stock.  The Corporation  shall assist and cooperate (but
the Corporation  shall not be required to expend  substantial  efforts or funds)
with any holder of Preferred Shares required to make any governmental filings or
obtain any  governmental  approval prior to or in connection with any conversion
of Preferred Shares hereunder 

                                      -7-
<PAGE>

(including,  without  limitation,  making any filings required to be made by the
Corporation).

                  (viii) If any  fractional  interest in a share of Common Stock
would,  except for the provisions of this subparagraph,  be deliverable upon any
conversion of shares of a holder's Preferred Stock, the Corporation,  in lieu of
delivering  the  fractional  share  therefor,  shall pay an amount to the holder
thereof equal to the Market Price of such fractional interest as of the Business
Day immediately preceding the date of conversion.

                  (ix) The  Corporation  shall  at all  times  reserve  and keep
available out of its authorized but unissued shares of Common Stock,  solely for
the purpose of issuance upon the  conversion of the  Preferred  Stock,  not less
than the number of shares of Common Stock  issuable  upon the  conversion of all
outstanding  Preferred  Stock which may then be exercised.  All shares of Common
Stock which are so issuable  shall,  when  issued,  be duly and validly  issued,
fully paid and  nonassessable  and free from all taxes,  liens and charges.  The
Corporation  shall take all such  actions as may be necessary to ensure that all
such shares of Common Stock may be so issued without violation of any applicable
law or governmental  regulation or any  requirements of any domestic  securities
exchange  upon which shares of Common  Stock may be listed  (except for official
notice of issuance which shall be immediately  delivered by the Corporation upon
each such issuance).

                  5B.  Subdivision  or  Combination  of  Common  Stock.  If  the
Corporation  at any  time  subdivides  (by  any  stock  split,  stock  dividend,
recapitalization  or otherwise) the outstanding shares of one or more classes of
Common  Stock into a greater  number of shares,  the  Conversion  Price (and the
Trigger Price and Series A/B Dilution Price) in effect immediately prior to such
subdivision shall be proportionately reduced, and if the Corporation at any time
combines (by reverse stock split or otherwise) the outstanding  shares of one or
more classes of Common  Stock into a smaller  number of shares,  the  Conversion
Price  (and  the  Trigger  Price  and  Series  A/B  Dilution  Price)  in  effect
immediately prior to such combination shall be proportionately increased.

                  5C. Reorganization, Reclassification, Consolidation, Merger or
Sale. In connection with any Reorganization,  (i) the holders of Preferred Stock
shall  thereafter  have  the  right to  acquire  and  receive,  in lieu of or in
addition  to (as the  case  may be)  the  shares  of  Common  Stock  immediately
theretofore  acquirable  and  receivable  upon the  conversion  of such holder's
Preferred Stock, such shares of stock, securities,  cash or other assets (or, if
not practicably  attainable,  the reasonable  equivalent thereof) as such holder
would have received in connection  with such  Reorganization  if such holder had
converted its Preferred Stock immediately prior to such Reorganization, and (ii)
dividends  and amounts in respect of  dividends  hereunder  payable in shares of
Common  Stock prior to such  Reorganization  shall be  payable,  in lieu of each
share of Common Stock, in such 

                                      -8-
<PAGE>

shares of stock,  securities,  cash or other  assets (or  reasonable  equivalent
thereof) as the holder of one share of Common Stock received in connection  with
such Reorganization. The Corporation shall make appropriate provisions to ensure
that the requirements of the previous sentence are effected.  In each such case,
the  Corporation  shall  also make  appropriate  provisions  to ensure  that the
provisions of this Section 5 and Sections 6 and 7 shall thereafter be applicable
to the Preferred Stock.

                  5D.      Notices.
                           -------

                  (i) Immediately  upon any adjustment of the Conversion  Price,
the  Corporation  shall give written  notice thereof to all holders of Preferred
Stock, setting forth in reasonable detail and certifying the calculation of such
adjustment.

                  (ii) The Corporation  shall give written notice to all holders
of Preferred  Stock at least 20 days prior to the date on which the  Corporation
closes  its books or fixes a record  date (a) with  respect to any  dividend  or
distribution  upon Common Stock,  (b) with respect to any pro rata  subscription
offer to  holders  of Common  Stock or (c) for  determining  rights to vote with
respect to any Liquidation or Reorganization.

                  5E.  Mandatory  Conversion.  The Corporation  may require,  by
written notice to all holders of Preferred  Stock,  the conversion of all of the
outstanding Preferred Stock into a number of shares of Common Stock equal to the
sum of: (a) the number of shares of Common  Stock  computed by  multiplying  the
number  of  Preferred  Shares  to be  converted  by the  Liquidation  Value of a
Preferred Share, and dividing the result by the applicable Conversion Price then
in effect,  plus (b) the number of shares of Common  Stock that would be payable
if all accrued but unpaid  dividends  were  declared  and paid on the  Preferred
Shares to be  converted;  provided  that the Closing  Price of the Common  Stock
(adjusted proportionately for stock dividends, stock splits,  combinations,  and
similar  changes in the Common  Stock  occurring  after the Closing) on at least
twenty (20) of the thirty (30) latest  trading  days  preceding  the date of the
Corporation's  notice has been greater than or equal to the Conversion Price. If
the  Corporation  shall require the conversion of the Preferred Stock under this
Section 5E within two years from the Initial Date of  Issuance,  then the number
of shares of Common Stock into which the shares of Preferred Stock are converted
shall be increased by the number of shares of Common Stock that would be payable
if the Corporation were immediately to declare and pay all dividends that in the
absence of conversion  would have accrued on such shares of Preferred Stock over
the six-month  period  immediately  following the date of conversion;  provided,
however,  that the total  dividends and amounts in respect of dividends  paid on
the Preferred Stock after the Date of Issuance thereof, including any additional
amounts in respect of dividends paid as a result of a required  conversion under
this Section 5E, shall not be less than the 

                                      -9-
<PAGE>

amount of  dividends  that would have accrued on all  outstanding  shares of the
Preferred Stock for one full year following the Initial Date of Issuance.

                  Any  conversion  of  shares  of  Preferred  Stock  under  this
Paragraph  5E shall be  effected  and be deemed to have been  effected as of the
close of business on the date on which the Corporation  provides  written notice
of such  conversion  to the  holders  of such  shares of  Preferred  Stock  (the
"Mandatory  Conversion  Time"),  and as of the Mandatory  Conversion  Time,  the
rights of the holders of the converted shares of Preferred Stock, as such, shall
cease and terminate,  such converted  shares of Preferred Stock shall be retired
in  accordance  with  paragraph  3F, the shares of Common  Stock into which such
shares of Preferred  Stock are converted shall be issued and deemed to have been
issued,  the  certificate(s)  that theretofore  represented  shares of Preferred
Stock thereafter shall represent the number of shares of Common Stock into which
the shares of Preferred Stock  theretofore  represented  thereby shall have been
converted, and the holder of any such certificate, upon the surrender thereof to
the  Corporation,  shall be  entitled  to  receive  from the  Corporation  a new
certificate  representing  the  number of shares of Common  Stock into which the
shares of  Preferred  Stock  theretofore  represented  thereby  shall  have been
converted.

                  5F.      Effect on Conversion Price of Certain Events.
                           --------------------------------------------

                  (i) General.  In order to prevent  dilution of the  conversion
rights  granted under this Section 5, the  Conversion  Price shall be subject to
adjustment from time to time pursuant to this paragraph 5F.

                  (ii)  Adjustment  of Conversion  Price.  If and whenever on or
after the Date of Issuance the  Corporation  issues or sells,  or in  accordance
with  this  paragraph  5F is deemed to have  issued  or sold,  other  than in an
Excluded Issuance,  any share of Common Stock for a consideration per share less
than the Trigger  Price in effect  immediately  prior to such time (a  "Dilutive
Event"),  then  forthwith  upon  such  issue or sale in the  Dilutive  Event the
Conversion  Price shall be reduced by multiplying the Conversion Price in effect
immediately  before the Dilutive Event by a fraction,  the numerator of which is
the number of shares of Common  Stock that are  Outstanding  on an  As-Converted
Basis (as defined below)  immediately  before the Dilutive Event plus the number
of shares of Common Stock that could be  purchased  at the Trigger  Price at the
time of the Dilutive Event for the aggregate  consideration paid or payable upon
the sale or issuance of Common Stock in the Dilutive Event,  and the denominator
of which is the  number of shares of Common  Stock  that are  Outstanding  on an
As-Converted  Basis  immediately  before the  Dilutive  Event plus the number of
shares  that are  acquired  or to be  acquired  upon the sale or issuance of the
Common  Stock in the Dilutive  Event.  For  purposes of this  paragraph  5F(ii),
"Outstanding on an  As-Converted  Basis"  immediately  before the Dilutive Event
means the sum of (i) all Common Stock issued and outstanding  immediately before
the  Dilutive  Event plus (ii) all Common  Stock  issuable  upon the 

                                      -10-
<PAGE>

exercise  of  Options  or  conversion  of  Convertible   Securities  outstanding
immediately before the Dilutive Event (other than Preferred Stock).

                  (iii) Issuance of Rights or Options. If the Corporation in any
manner  grants any  Options  and the price per share for which  shares of Common
Stock are issuable upon the exercise of any such Option is less than the Trigger
Price in effect  immediately  prior to the time of the  granting of such Option,
then such shares of Common Stock shall be deemed to have been issued and sold by
the  Corporation  at the time of the granting of such Options for such price per
share and the  Conversion  Price shall be adjusted in accordance  with paragraph
5F(ii) above.  For purposes of this  paragraph,  the "price per share" for which
shares of Common  Stock are  issuable  upon the  exercise of any Option shall be
equal to the sum of the amounts of consideration (if any) received or receivable
by the Corporation with respect to such shares of Common Stock upon the granting
of the Option and upon  exercise of the  Option.  No further  adjustment  of the
Conversion  Price shall be made upon the actual  issue of such Common Stock upon
the exercise of such Options.

                  (iv) Issuance of Convertible Securities. If the Corporation in
any manner issues or sells any Convertible  Security (or Options to purchase any
Convertible  Security)  and the price per share for shares of Common  Stock that
are issuable upon conversion or exchange  thereof is less than the Trigger Price
in effect  immediately  prior to the time of such issue or sale (or the granting
of such  Option),  then such shares of Common Stock shall be deemed to have been
issued and sold by the  Corporation  at the time of the issuance or sale of such
Convertible Securities (or the granting of such Option) for such price per share
and the Conversion  Price shall be adjusted in accordance with paragraph  5F(ii)
above.  For the  purposes  of this  paragraph,  the  "price per share" for which
shares  of  Common  Stock  are  issuable  upon  conversion  or  exchange  of any
Convertible  Security (or exercise of any Option therefor) shall be equal to the
sum of the  amounts of  consideration  (if any)  received or  receivable  by the
Corporation  upon the issuance of the Convertible  Security (or such Option) and
upon the  conversion  or exchange of such  Convertible  Security (or exercise of
such Option).  No further  adjustment of the Conversion Price shall be made upon
the  actual  issue of such  Common  Stock upon  conversion  or  exchange  of any
Convertible Security, and if any such issue or sale of such Convertible Security
is made upon  exercise of any Options for which  adjustments  of the  Conversion
Price had been or are to be made pursuant to other provisions of this Section 5,
no further  adjustment of the  Conversion  Price shall be made by reason of such
issue or sale.

                  (v) Change in Option Price or Conversion Rate. If the purchase
price provided for in any Option, the additional  consideration (if any) payable
upon the issue,  conversion or exchange of any Convertible Security, or the rate
at which any Convertible Security is convertible into or exchangeable for Common
Stock change at any time, any Conversion Price previously  adjusted with respect
to such Option or Convertible  Security and in effect at the time of such change
shall be 

                                      -11-
<PAGE>

readjusted to the Conversion  Price which would have been in effect at such time
had such Option or  Convertible  Security  originally  provided for such changed
purchase price, additional consideration or changed conversion rate, as the case
may be, at the time initially granted, issued or sold.

                  (vi) Treatment of Expired Options and Unexercised  Convertible
Securities. Upon the expiration of any Option or the termination of any right to
convert or exchange any  Convertible  Security  without the exercise of any such
Option or right, any Conversion Price then in effect hereunder shall be adjusted
to the  Conversion  Price  which  would  have been in effect at the time of such
expiration or termination had such Option or Convertible Security, to the extent
outstanding  immediately  prior to such  expiration or  termination,  never been
issued.

                  (vii)  Calculation of  Consideration  Received.  If any Common
Stock,  Option or Convertible  Security is issued or sold or deemed to have been
issued or sold for cash, the consideration  received therefor shall be deemed to
be the amount  received by the Corporation  therefor.  In case any Common Stock,
Options or Convertible  Securities are issued or sold for a consideration  other
than cash,  the amount of the  consideration  other  than cash  received  by the
Corporation  shall be the fair value of such  consideration,  except  where such
consideration consists of securities,  in which case the amount of consideration
received by the Corporation  shall be the Market Price thereof as of the date of
receipt.  If any Common Stock,  Option or Convertible  Security is issued to the
owners of the  non-surviving  entity in connection  with any merger in which the
Corporation is the surviving  corporation,  the amount of consideration therefor
shall be deemed to be the fair value of such  portion of the assets and business
of the non-surviving  entity as is attributable to such Common Stock, Options or
Convertible Securities,  as the case may be. The fair value of any consideration
other than cash and securities shall be as determined in good faith by the Board
of Directors of the Corporation.

                  (viii) Integrated  Transactions.  In case any Option is issued
in connection  with the issue or sale of other  securities  of the  Corporation,
together   comprising   one   integrated   transaction   in  which  no  specific
consideration  is  allocated to such Option by the parties  thereto,  the Option
shall be deemed to have been issued for a consideration of $.01.

                  (ix) Treasury Shares.  For purposes of calculating  under this
paragraph 5F the number of shares of Common Stock outstanding at any given time,
the number of shares of Common Stock  outstanding  at such time does not include
shares owned or held by or for the account of the  Corporation or any subsidiary
thereof,  and the disposition of any shares so owned or held shall be considered
an issue or sale of Common Stock.

                  (x)  De  Minimis   Adjustments.   Notwithstanding   any  other
provisions of this Section 5, the Corporation  shall not be required to make any

                                      -12-
<PAGE>

adjustment  of the  Conversion  Price unless such  adjustment  would  require an
increase or decrease of at least one  percent  (1%) in the  Conversion  Price as
then in effect. Any lesser adjustment shall be carried forward and shall be made
no later than the time of, and together  with,  the next  subsequent  adjustment
which,  together with any adjustment or adjustments  so carried  forward,  shall
amount to an increase or decrease of at least one percent (1%) of the Conversion
Price  as  then  in  effect.  If any  action  would  require  adjustment  of the
Conversion  Price pursuant to more than one  subparagraph  of this paragraph 5F,
only one  adjustment  shall be made as  determined in good faith by the Board of
Directors of the Corporation.

                  Section 6.        Liquidating Dividends.
                                    ---------------------

                  If the  Corporation  declares or pays a  Liquidating  Dividend
upon the  Common  Stock,  then  the  Corporation  shall  pay to the  holders  of
Preferred Stock at the time of payment  thereof the  Liquidating  Dividend which
would have been paid to such  holders had such  Preferred  Stock been  converted
immediately  prior to the record  date fixed for  determining  the  stockholders
entitled to receive payment of such Liquidating Dividend,  or, if no record date
is fixed,  the date as of which the record  holders of Common Stock  entitled to
such dividends are to be determined.

                  Section 7.        Purchase Rights.
                                    ---------------

                  If at any time the  Corporation  grants,  issues  or sells any
Purchase  Rights  pro rata to the record  holders of any class of Common  Stock,
then each holder of Preferred Stock shall be entitled to acquire, upon the terms
applicable to such Purchase  Rights,  the aggregate  Purchase  Rights which such
holder  would  have  acquired  if such  holder  had held the number of shares of
Common Stock  acquirable  upon  conversion  of such  holder's  Preferred  Shares
immediately  before the date on which a record is taken for the grant,  issuance
or sale of such Purchase Rights,  or, if no such record is taken, the date as of
which the record  holders of Common  Stock are to be  determined  for the grant,
issue or sale of such Purchase Rights.

                  Section 8.        Registration of Transfer.
                                    ------------------------

                  The Corporation  shall keep at its principal office a register
for the  registration  of issuances and transfers of Preferred  Stock.  Upon the
surrender of any certificate  representing  Preferred  Stock at such place,  the
Corporation  shall,  at the  request of the record  holder of such  certificate,
execute  and  deliver  (at  the  Corporation's  expense)  a new  certificate  or
certificates  in exchange  therefor  representing in the aggregate the number of
Preferred  Shares  represented  by the  surrendered  certificate.  Each such new
certificate  shall be registered in such name and shall represent such number of
Preferred  Shares as is requested by the holder of the  surrendered  certificate
and shall be substantially identical in form to the surrendered certificate, and
dividends  shall  accrue  on  the  Preferred  Stock   

                                      -13-
<PAGE>

represented by such new  certificate  from the date to which dividends have been
fully paid on such Preferred Stock represented by the surrendered certificate.

                  Section 9.        Replacement.
                                    -----------

                  Upon  receipt  of  evidence  reasonably  satisfactory  to  the
Corporation (an affidavit of the registered holder shall be satisfactory) of the
ownership and the loss,  theft,  destruction  or  mutilation of any  certificate
evidencing  Preferred  Shares,  and in the  case  of any  such  loss,  theft  or
destruction,   upon  receipt  of  indemnity   reasonably   satisfactory  to  the
Corporation  (provided  that if the holder is a financial  institution  or other
institutional  investor,  its own agreement shall be  satisfactory),  or, in the
case of any such mutilation upon surrender of such certificate,  the Corporation
shall (at its  expense)  execute and deliver in lieu of such  certificate  a new
certificate of like kind representing the number of Preferred Shares represented
by such lost, stolen,  destroyed or mutilated  certificate and dated the date of
such lost,  stolen,  destroyed or mutilated  certificate,  and  dividends  shall
accrue on the Preferred Stock  represented by such new certificate from the date
to which dividends have been fully paid on the Preferred  Shares  represented by
such lost, stolen, destroyed or mutilated certificate.

                  Section 10.       Definitions.
                                    -----------

                  "Bond  Offering"  means an  underwritten  offering of notes or
debentures of the Corporation to the public, with or without Options,  primarily
for the  purpose  of  refinancing  the  indebtedness  of  International  Private
Satellite  Partners,  L.P.  ("Orion  Atlantic")  outstanding  under  the  Credit
Agreement dated December 6, 1991 among Orion  Atlantic,  the Banks named therein
and The Chase Manhattan Bank (National Association), as Agent.

                  "Business  Day" means a day on which banks are generally  open
for business in New York City.

                  "Closing" means ______ ___, 1996.

                  "Closing  Price"  of each  share  of  Common  Stock  or  other
security  means the composite  closing price of the sales of the Common Stock or
such other  security on all  securities  exchanges on which such security may at
the time be listed (as  reported in The Wall Street  Journal),  or, if there has
been no sale on any such exchange on any day, the average of the highest bid and
lowest  asked  prices of the  Common  Stock or such other  security  on all such
exchanges  at the end of such day,  or, if such  security is not so listed,  the
closing  price (or last price,  if  applicable)  of sales of the Common Stock or
such other  security  in the Nasdaq  National  Market (as  reported  in The Wall
Street  Journal)  on such day,  or if such  security is not quoted in the Nasdaq
National Market but is traded  over-the-counter,  the average of the highest bid
and lowest asked prices on such day in the  over-the-counter  

                                      -14-
<PAGE>

market as reported by the National Quotation Bureau Incorporated, or any similar
successor organization.

                  "Common Stock" means,  collectively,  the Corporation's common
stock,  par value  $0.01 per share,  and any  capital  stock of any class of the
Corporation  hereafter  authorized  which  is  not  limited  to a  fixed  sum or
percentage  of par or stated  value in  respect  to the  rights  of the  holders
thereof to  participate in dividends or in the  distribution  of assets upon any
Liquidation  of  the  Corporation;  and if  there  is a  change  such  that  the
securities  issuable upon  conversion  of the  Preferred  Stock are issued by an
entity  other  than  the  Corporation  or  there  is a  change  in the  class of
securities so issuable, then the term "Common Stock" shall mean one share of the
security  issuable upon  conversion  of the Preferred  Stock if such security is
issuable in shares,  or shall mean the smallest  unit in which such  security is
issuable if such security is not issuable in shares.

                  "Conversion  Price"  shall mean,  with respect to any Series C
Share,  $17.50  (subject  to  adjustment  as  provided  in  Section 5 for events
occurring after its Date of Issuance).

                  "Convertible  Securities"  means any stock or other securities
of the Corporation convertible into or exchangeable for Common Stock.

                  "Convertible   Subordinated   Debenture   Offering"  means  an
offering  of  convertible  subordinated  debentures  of the  Corporation  to the
public, which debentures would be convertible into Common Stock.

                  "Corporation"  means Orion Newco  Services,  Inc.,  a Delaware
corporation.

                  "Date of Issuance," with respect to any Preferred Share, means
the date on  which  the  Corporation  initially  issues  such  Preferred  Share,
regardless of the number of times  transfer of such  Preferred  Share is made on
the stock records  maintained by or for the  Corporation  and  regardless of the
number of certificates which may be issued to evidence such Preferred Share.

                  "Dividend  Reference  Date" mean  [___________]  of each year,
commencing  __________,  1996, and each of the following:  (i) the date on which
the  Liquidation  Value of such Preferred  Share is paid, (ii) the date on which
such  Preferred  Share is converted into shares of Common Stock  hereunder,  and
(iii) the Maturity Date.

                  "Excluded  Issuance"  means the issue or sale of (i) shares of
Common Stock in respect of any transaction  described in paragraph 5B (including
without  limitation any stock split, stock dividend or  recapitalization),  (ii)
shares of Common  Stock by the  Corporation  pursuant to the exercise of Options
and  Convertible  Securities  outstanding  immediately  prior to the  Closing at
exercise prices that are 

                                      -15-
<PAGE>

greater than or equal to the respective  exercise prices in effect as of Closing
(as adjusted  pursuant to the terms of such  securities  to give effect to stock
dividends  or stock  splits or a  combination  of shares  in  connection  with a
recapitalization,  merger, consolidation or other reorganization occurring after
the Closing),  (iii) up to an aggregate of 150,000 shares of Common Stock by the
Corporation  for any  purpose,  (iv)  Options  to  acquire  Common  Stock by the
Corporation  pursuant to a resolution  of, or a stock option plan  approved by a
resolution of, the Board of Directors of the  Corporation  (or the  compensation
committee  thereof) to the Corporation's  employees or directors,  (v) shares of
Common  Stock,  Options or  Convertible  Securities  (or shares of Common  Stock
pursuant to the exercise of Options and Convertible Securities) as part of or in
connection  with  a  Bond  Offering  or  a  Convertible  Subordinated  Debenture
Offering.

                  "Initial  Date of Issuance"  means the Date of Issuance of the
first share of Preferred Stock to be issued.

                  "Initial  Redemption  Date" means the earlier of (i) the close
of business on ______,  1998.  [two years from the Date of Issuance] or (ii) the
effective date of a Reorganization.

                  "Junior  Securities"  means Common Stock and any other capital
stock or other equity  securities  issued by the Corporation,  whether currently
existing or  hereafter  authorized  or issued  (other than Series A Preferred or
Series B Preferred  or any other series of  preferred  stock of the  Corporation
issued  pursuant to an option  granted to  purchasers  of Series A Preferred  in
connection with the initial issuances of Series A Preferred by the Corporation).

                  "Liquidation" means the liquidation, dissolution or winding up
of the Corporation;  provided, however, that neither the consolidation or merger
of the  Corporation  into or with any other entity or entities,  nor the sale or
transfer by the Corporation of all or any part of its assets,  nor the reduction
of the capital stock of the  Corporation,  shall be deemed to be a  liquidation,
dissolution or winding up of the Corporation.

                  "Liquidating  Dividend" means a dividend upon the Common Stock
payable  otherwise than in cash out of legally  available  funds  (determined in
accordance with generally accepted accounting principles,  consistently applied)
except for a stock dividend payable in shares of Common Stock.

                  "Liquidation  Value" of any Preferred  Share shall be equal to
$1,000.

                  "Market Price" of each share of Common Stock or other security
means,  with  respect to a specified  date,  the Closing  Price of such share or
other security, averaged over a period of the 20 consecutive Business Days prior
to such  date.  If  during  this  period  such  security  is not  listed  on any
securities  exchange,  quoted in the Nasdaq  National  Market,  or quoted in the
over-the-counter  market, 

                                      -16-
<PAGE>

the  Market  Price  will be the fair  value of such  shares of  Common  Stock or
security  determined by agreement  between the  Corporation and the holders of a
majority of the  outstanding  Preferred  Shares.  If such  parties are unable to
reach  agreement  within a  reasonable  period of time,  the fair  value of such
security shall be determined by an independent  appraiser experienced in valuing
such type of  consideration  jointly selected by the Corporation and the holders
of a majority of the outstanding  Preferred  Shares.  The  determination of such
appraiser shall be final and binding upon the parties, and the fees and expenses
of such appraiser shall be borne by the Corporation.

                  "Maturity  Date"  means the close of  business  on ______  __,
2021. [25 years from the Date of Issuance]

                  "Options"  means any options,  warrants or rights to subscribe
for or to purchase Common Stock or any Convertible Securities.

                  "Person" means an individual, a partnership, a corporation, an
association,  a joint stock company,  a limited  liability  company,  a trust, a
joint venture,  an unincorporated  organization and a governmental entity or any
department, agency or political subdivision thereof.

                  "Preferred Share" means a share of Series C Preferred.

                  "Preferred Stock" means the Series C Preferred.

                  "Prior  Dividend  Date"  means,  with  respect  to a  Dividend
Reference Date, the previous  Dividend  Reference Date following which dividends
were  paid on shares  of  Preferred  Stock  hereunder  (or,  if there is no such
previous Dividend Reference Date, the Date of Issuance).

                  "Public Offering" means any offering by the Corporation of its
equity securities to the public pursuant to an effective  registration statement
under the Securities Act of 1933, as then in effect, or any comparable statement
under  any  similar  federal  statute  then in  force;  provided,  that  "Public
Offering"  shall not  include an  offering  made in  connection  with a business
acquisition or combination or an employee benefit plan.

                  "Purchase Rights" means any Options, Convertible Securities or
rights to purchase stock, warrants, securities or other property.

                  "Redemption Date" means the date on which the Redemption Price
of a Preferred Share is paid to the holder thereof.

                  "Redemption   Price"  means  the  Liquidation  Value  of  such
Preferred Share, payable in cash, plus an amount equal to all accrued and unpaid
dividends thereon, payable in shares of Common Stock pursuant to paragraph 1D.

                                      -17-
<PAGE>

                  "Reorganization"  means any recapitalization,  reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Corporation's assets to another Person or other transaction which is effected in
such a manner  that  holders of Common  Stock are  entitled  to receive  (either
directly  or upon  subsequent  liquidation)  stock,  securities  or assets  with
respect to or in exchange for Common Stock.

                  "Series A Certificate"  means the Certificate of Designations,
Rights and Preferences for the Series A Preferred.

                  "Series B Certificate"  means the Certificate of Designations,
Rights and Preferences for the Series B Preferred.

                  "Series  A  Preferred"  means  the  Corporation's  Series A 8%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series  B  Preferred"  means  the  Corporation's  Series B 8%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series  C  Preferred"  means  the  Corporation's  Series C 6%
Cumulative Redeemable Convertible Preferred Stock, par value $.01 per share.

                  "Series A/B Dilution Price" means, at any time, the conversion
price  for the  Series  B  Preferred  as then  in  effect  under  the  Series  B
Certificate.

                  "Series A Share" means a share of Series A Preferred.

                  "Series B Share" means a share of Series B Preferred.

                  "Series C Share" means a share of Series C Preferred.

                  "Trigger  Price"  shall  mean,  with  respect  to any Series C
Share,  $14.00  (subject  to  adjustment  as  provided  in Section 5B for events
occurring after its Date of Issuance).

                  Section 11.       Amendment and Waiver.
                                    --------------------

                  No  amendment,  modification  or waiver  shall be  binding  or
effective  with respect to any provision  hereof  without the prior  affirmative
vote or written  consent of the  holders of a majority of the  Preferred  Shares
outstanding at the time such action is taken;  provided,  however,  that without
the prior  affirmative  vote or  written  consent  of each  holder  individually
holding at least 51% of the  Preferred  Stock then  outstanding,  no such action
shall  change  (i) the rate at which or the  manner  in which  dividends  on the
Preferred Stock accrue or the form of  consideration in which such dividends are
payable  or the times at which  such  dividends  become  payable  or the  amount
payable on redemption of the Preferred 

                                      -18-
<PAGE>

Stock or the times at which redemption of Preferred Stock is to occur,  (ii) any
Conversion  Price of the  Preferred  Stock or the  number  of shares or class of
stock into which the  Preferred  Stock is  convertible,  (iii) the  priority  of
payment of dividends to the Preferred Stock, (iv) the Liquidation Value, (v) the
voting rights of the  Preferred  Stock,  (vi) the rights of the Preferred  Stock
upon a  reorganization,  (vii) the  provisions  for mandatory  conversion of the
Preferred Stock,  (viii) the rights of holders of the Preferred Stock to acquire
Purchase Rights,  or (ix) the percentage  required to approve any change in this
Section 11.

                  Section 12.       Notices.
                                    -------

                  Except as otherwise expressly provided hereunder,  all notices
referred to herein shall be in writing and shall be delivered by  registered  or
certified mail,  return receipt  requested and postage prepaid,  or by reputable
overnight  courier service,  charges  prepaid,  and shall be deemed to have been
given when so mailed or sent (i) to the Corporation,  at its principal executive
offices and (ii) to any  stockholder,  at such holder's address as it appears in
the stock records of the  Corporation  (unless  otherwise  indicated by any such
holder).













                                      -19-


                    Incorporated Under the Laws of Delaware


Number                                                            Shares

                   SEE TRANSFER RESTRICTIONS ON REVERSE SIDE

                          ORION NETWORK SYSTEMS, INC.

         SERIES A 8% CUMULATIVE REDEEMABLE CONVERTIBLE PREFERRED SHARES

  Authorized to Issue 40,000,000 Common Shares and 1,000,000 Preferred Shares
(Including 15,000 Series A 8% Cumulative Redeemable Convertible Preferred Shares
                           -Par Value $.01 per share)



THIS CERTIFIES THAT              ** Specimen**                            is the
                     -----------------------------------------------------
registered holder of             ** Specimen**                            Shares
                     -----------------------------------------------------
of  the  capital  stock  of  the  aboved  named  corporation,   fully  paid  and
non-assesable,  transferable  only on the books of the Corporation by the holder
hereof in person or by Attorney  upon  surrender  of this  Certificate  properly
endorsed.

IN WITNESS  WHEREOF,  the said  Corporation  has caused this  Certificate  to be
signed by its duly  authorized  officers and its  Corporate  Seal to be hereunto
affixed

        this                day                    of                 A.D. 19
             --------------                           ---------------        --


- ---------------------------------                   ----------------------------
        Secretary                                            President
<PAGE>

     The Company will furnish  without charge to each holder of Preferred  Stock
represented by this certificate,  upon request of such stockholder,  the powers,
designations, preferences and relative, participating optional, or other special
rights  of the  class  of  stock  represented  hereby  and the  qualificaations,
limitations or restrictions of such preferences and/or rights.

     The securities  represented by this certificate  were originally  issued on
June 17, 1994, and have not been registered under the Securities Act of 1933, as
amended,  and may not be  transferred  or sold except  pursuant to an  effective
registration  statement  under  the  Securities  Act of 1933,  as  amended,  and
applicable   state   Securities  laws  or  an  available   exemption  from  such
registration.  The transfer of the securities represented by this certificate is
subject to the conditions and restrictions  specified in the Purchase Agreement,
dated as of June 17,  1994  between  the  issuer  (the  "Company")  and  certain
conditions  have been fulfilled  with respect to such  transfer.  A copy of such
conditions  shall be furnished by the Company to the holder  hereof upon written
request and without charge.

     The  securities  represented  by this  certificate  are  subject to certain
voting  agreements  and  restrictions  on transfer  contained  in a  Stockholder
Agreement  dated as of June 17,  1994,  among the  Company  and  certain  of the
Company's  stockholders.  A copy of such  Stockholders  Agreement will furnished
without charge to the holder hereof upon written request.







     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:


TEN COM     as tenants in common           UNIF GIFT MIN ACT -...Custodian...
TEN ENT     as tenants by entireties                        (Cust)      (Minor) 
JT TEN      as joint tenants with right of         under Uniform Gifts to Minors
            survivorship and not as tenants            Act......................
            in common                                           (State)

     Additional abbreviations may also be used though no in the above list.


     For the value  received,  _____________________  hereby  sell,  assign  and
transfer  unto  ________________________________________________________________
________________________________________________________________________  Shares
represented by the within Certificate,  and do hereby irrevocable constitute and
appoint  ________________________________________________________   Attorney  to
transfer the said Shares on the books of the within named  Corporation with full
power and substitution in the premises.

Dated ___________________________ 19__

In the presence of            __________________________________________________

____________________________________________


<PAGE>

                    Incorporated Under the Laws of Delaware


Number                                                            Shares

                   SEE TRANSFER RESTRICTIONS ON REVERSE SIDE

                          ORION NETWORK SYSTEMS, INC.

         SERIES B 8% CUMULATIVE REDEEMABLE CONVERTIBLE PREFERRED SHARES

  Authorized to Issue 40,000,000 Common Shares and 1,000,000 Preferred Shares
(Including 5,000 Series B 8% Cumulative Redeemable Convertible Preferred Shares
                           -Par Value $.01 per share)



THIS CERTIFIES THAT              ** Specimen**                            is the
                     -----------------------------------------------------
registered holder of             ** Specimen**                            Shares
                     -----------------------------------------------------
of  the  capital  stock  of  the  aboved  named  corporation,   fully  paid  and
non-assesable,  transferable  only on the books of the Corporation by the holder
hereof in person or by Attorney  upon  surrender  of this  Certificate  properly
endorsed.

IN WITNESS  WHEREOF,  the said  Corporation  has caused this  Certificate  to be
signed by its duly  authorized  officers and its  Corporate  Seal to be hereunto
affixed

        this                day                    of                 A.D. 19
             --------------                           ---------------        --


- ---------------------------------                   ----------------------------
        Secretary                                            President
<PAGE>

     The Company will furnish  without charge to each holder of Preferred  Stock
represented by this certificate,  upon request of such stockholder,  the powers,
designations, preferences and relative, participating optional, or other special
rights  of the  class  of  stock  represented  hereby  and the  qualificaations,
limitations or restrictions of such preferences and/or rights.

     The securities  represented by this certificate  were originally  issued on
June 19, 1995, and have not been registered under the Securities Act of 1933, as
amended,  and may not be  transferred  or sold except  pursuant to an  effective
registration  statement  under  the  Securities  Act of 1933,  as  amended,  and
applicable   state   Securities  laws  or  an  available   exemption  from  such
registration.  The transfer of the securities represented by this certificate is
subject to the conditions and restrictions  specified in the Purchase Agreement,
dated as of June 16,  1995  between  the  issuer  (the  "Company")  and  certain
conditions  have been fulfilled  with respect to such  transfer.  A copy of such
conditions  shall be furnished by the Company to the holder  hereof upon written
request and without charge.

     The  securities  represented  by this  certificate  are  subject to certain
voting  agreements  and  restrictions  on transfer  contained  in a  Stockholder
Agreement  dated as of June 17,  1994,  among the  Company  and  certain  of the
Company's  stockholders.  A copy of such  Stockholders  Agreement will furnished
without charge to the holder hereof upon written request.







     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:


TEN COM     as tenants in common           UNIF GIFT MIN ACT -...Custodian...
TEN ENT     as tenants by entireties                        (Cust)      (Minor) 
JT TEN      as joint tenants with right of         under Uniform Gifts to Minors
            survivorship and not as tenants            Act......................
            in common                                           (State)

     Additional abbreviations may also be used though no in the above list.


     For the value  received,  _____________________  hereby  sell,  assign  and
transfer  unto  ________________________________________________________________
________________________________________________________________________  Shares
represented by the within Certificate,  and do hereby irrevocable constitute and
appoint  ________________________________________________________   Attorney  to
transfer the said Shares on the books of the within named  Corporation with full
power and substitution in the premises.

Dated ___________________________ 19__

In the presence of            __________________________________________________

____________________________________________



<PAGE>

                    Incorporated Under the Laws of Delaware


Number                                                            Shares

                   SEE TRANSFER RESTRICTIONS ON REVERSE SIDE

                          ORION NETWORK SYSTEMS, INC.

         SERIES C 6% CUMULATIVE REDEEMABLE CONVERTIBLE PREFERRED SHARES

  Authorized to Issue 40,000,000 Common Shares and 1,000,000 Preferred Shares
   (Including 125,000 Series C 6% Cumulative Redeemable Convertible Preferred
                        Shares-Par Value $.01 per share)



THIS CERTIFIES THAT              ** Specimen**                            is the
                     -----------------------------------------------------
registered holder of             ** Specimen**                            Shares
                     -----------------------------------------------------
of  the  capital  stock  of  the  aboved  named  corporation,   fully  paid  and
non-assesable,  transferable  only on the books of the Corporation by the holder
hereof in person or by Attorney  upon  surrender  of this  Certificate  properly
endorsed.

IN WITNESS  WHEREOF,  the said  Corporation  has caused this  Certificate  to be
signed by its duly  authorized  officers and its  Corporate  Seal to be hereunto
affixed

        this                day                    of                 A.D. 19
             --------------                           ---------------        --


- ---------------------------------                   ----------------------------
        Secretary                                            President
<PAGE>

     THE COMPANY WILL FURNISH  WITHOUT CHARGE TO EACH HOLDER OF PREFERRED  STOCK
REPRESENTED BY THIS CERTIFICATE,  UPON REQUEST OF SUCH STOCKHOLDER,  THE POWERS,
DESIGNATIONS, PREFERENCES AND RELATIVE, PARTICIPATING OPTIONAL, OR OTHER SPECIAL
RIGHTS  OF THE  CLASS  OF  STOCK  REPRESENTED  HEREBY  AND  THE  QUALIFICATIONS,
LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES AND/OR RIGHTS.

     THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE  HAVE NOT BEEN  REGISTERED
UNDER THE  SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"),  OR APPLICABLE  STATE
SECURITIES  LAWS AND MAY NOT BE OFFERED,  SOLD OR  TRANSFERRED IN THE ABSENCE OF
REGISTRATION OR THE  AVAILABILITY OF ANY EXEMPTION FROM  REGISTRATION  UNDER THE
ACT AND REGULATIONS PROMULGATED THEREUNDER AND APPLICABLE STATE SECURITIES LAWS.


     THE  SECURITIES  REPRESENTED  BY THIS  CERTIFICATE  ARE  SUBJECT TO CERTAIN
TRANSFER RESTRICTIONS  CONTAINED IN A TRANSFER RESTRICTION AGREEMENT BETWEEN THE
COMPANY  AND  THE  ORIGINAL  HOLDER  OF  PREFERRED  STOCK  REPRESENTED  BY  THIS
CERTIFICATE.  SUCH TRANSFER  RESTRICTIONS  MAY REQUIRE ANY SUBSEQUENT  HOLDER OF
PREFERRED  STOCK  REPRESENTED BY THIS  CERTIFICATE TO EXECUTE AND DELIVER TO THE
COMPANY  A  SIMILAR  TRANSFER  RESTRICTION  AGREEMENT.  A COPY OF SUCH  TRANSFER
RESTRICTION AGREEMENT WILL BE FURNISHED WITHOUT CHARGE TO THE HOLDER HEREOF UPON
WRITTEN REQUEST.



     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:


TEN COM     as tenants in common           UNIF GIFT MIN ACT -...Custodian...
TEN ENT     as tenants by entireties                        (Cust)      (Minor) 
JT TEN      as joint tenants with right of         under Uniform Gifts to Minors
            survivorship and not as tenants            Act......................
            in common                                           (State)

     Additional abbreviations may also be used though no in the above list.


     For the value  received,  _____________________  hereby  sell,  assign  and
transfer  unto  ________________________________________________________________
________________________________________________________________________  Shares
represented by the within Certificate,  and do hereby irrevocable constitute and
appoint  ________________________________________________________   Attorney  to
transfer the said Shares on the books of the within named  Corporation with full
power and substitution in the premises.

Dated ___________________________ 19__

In the presence of            __________________________________________________

____________________________________________




                                                             COMMON STOCK

NUMBER                                                           SHARES

                    [Logo]          ORION
                              NETWORK SYSTEMS,INC.
                    INCORPORATED UNDER THE LAWS OF DELAWARE    CUSIP 68628K 10 4
                                                               SEE REVERSE FOR
                                                            CERTAIN RESTRICTIONS


THIS CERTIFIES THAT:











or the record holder

FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, PAR VALUE $.01 PER SHARE,
                                       OF
                           ORION NETWORK SYSTEMS INC.

                              CERTIFICATE OF STOCK
transferable  on the books of the  Corporation by the holder hereof in person or
by duly authorized upon surrender of this certificate properly endorsed.

     This  certificate is not valid unless  conutersigned  and registered by the
Transfer Agent and Registrar.

     WITNESS the facsimile seal of the Corporation and the facsimile  signatures
of its duly authorized officers.


Dated:


                          Orion Network Systems, Inc.
                              Corporate Seal, 1982
                                    Delaware



/s/                                             /s/

                    TREASURER                                         CHAIRMAN
<PAGE>

THE OWNERSHIP OF THE SECURITIES BY THIS CERTIFICATE IS RESTRICTED BY AND SUBJECT
TO THE PROVISIONS OF THE RESTATED  CERTIFICATE OF INCORPORATION OF ORION NETWORK
SYSTEMS, INC. (THE "CORPORATION"), WHICH (i) PROVIDES THAT THE CORPORATION SHALL
HAVE THE RIGHT TO REDEEM ANY STOCK OF THE  CORPORATION IF IN THE JUDGMENT OF THE
BOARD OF DIRECTORS SUCH ACTION SHOULD BE TAKEN TO PREVENT THE LOSS OR SECURE THE
REINSTATEMENT OF ANY LICENSE OR FRANCHISE HELD BY THE CORPORATION, AND (ii) SETS
FORTH  THE TERMS  AND  CONDITIONS  OF SUCH  REDEMPTION.  A COPY OF THE  RESTATED
CERTIFICATE  OF  INCORPORATION  IS AVAILABLE  FOR  INSPECTION  AT THE  PRINCIPAL
OFFICES OF THE CORPORATION.

     Orion Network systems, Inc. will furnish without charge to each stockholder
who  so   requests   the  powers,   designations,   preferences   and   relative
participating,  optional  or  other  special  rights  of each  class of stock or
sereies  thereof  of  Orion  Network  Systems,  Inc.,  and  the  qualifications,
limitations and restrictions of such preferences and/or rights. Such request may
be made to Orion Network Systems, Inc. or the transfer agent.

     The following  abbreviations,  when used in the  inscription on the face of
this  certificate,  shall be  construed  as though they were written out in full
according to applicable laws or regulations:


TEN COM     as tenants in common           UNIF GIFT MIN ACT -...Custodian...
TEN ENT     as tenants by entireties                        (Cust)      (Minor) 
JT TEN      as joint tenants with right of         under Uniform Gifts to Minors
            survivorship and not as tenants            Act......................
            in common                                           (State)

     Additional abbreviations may also be used though no in the above list.


     For value  received,  ______________________________________  hereby  sell,
assign and transfer unto _______________________________________________________
[please insert the Social Security or other identifying number of assignee]

________________________________________________________________________________
   pleas print or typewrite name and address including postal zip of assignee

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ Shares
of the  Capital  Stock  represented  by the  within  Certificate,  and do hereby
irrevocably constitute and appoint _____________________________________________
Attorney to transfer the said stock on the books of the within-named Corporation
with full power of substitution in the premises.

Dated, __________________________________


                                        ________________________________________


[NOTICE:  The  signature to this  assignment  must  correspond  with the name as
wrritten  upon  the  face  of the  Certificate,  in  every  particular,  without
alteration or enlargement, or any change whatever.]



                            RESTRICTION ON TRANSFER

  THE SECURITIES  REPRESENTED BY THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE
  SECURITIES ACT OF 1933 (THE "ACT") OR APPLICABLE  STATE  SECURITIES  LAWS, AND
  CANNOT BE RESOLD UNLESS SUBSEQUENTLY REGISTERED UNDER THE ACT AND SUCH LAWS OR
  UNLESS AN EXEMPTION FROM SUCH REGISTRATION IS AVAILABLE.



                                     WARRANT
                  To purchase 50,000 shares of Common Stock of
                           Orion Network Systems, Inc.


               1. Grant of Warrant. This is to certify that, for value received,
DACOM Corp. (the "Holder") is entitled to purchase, subject to the provisions of
this  Warrant,  from Orion  Network  Systems,  Inc.  ("Orion"),  an aggregate of
50,000  shares of common stock,  par value $.0l per share,  of Orion (the "Orion
Common  Stock") at a purchase  price per share  equal to $14.00  (the  "Exercise
Price").  The number of shares of Orion Common  Stock that may be received  upon
exercise of this Warrant and the Exercise  Price are subject to adjustment  from
time to time as hereinafter set forth.

                2. Term.  This  Warrant may be  exercised in whole or in part at
any time or from time to time during the period  commencing  on the date that is
180 days and ending on the date that is 360 days after the  "Commencement  Date"
as defined  in Article 1 of the Joint  Investment  Agreement  (the  "Agreement")
dated  November  11,  1996  between  Orion Asia  Pacific  Corp.  and the Holder,
provided,   however,   that  this  Warrant  shall  terminate   immediately  upon
termination of the Agreement.

             3.     Exercise Procedures.  In order to exercise this Warrant, the
Holder  shall send a written  notice of exercise to Orion on any business day at
Orion's principal office,  addressed to the attention of the Treasurer of Orion,
which notice shall  specify the number of shares for which this Warrant is being
exercised,  and shall be accompanied by payment in full of the Exercise Price of
the shares for which this  Warrant is being  exercised.  Payment of the Exercise
Price for the shares of Orion Common Stock purchased pursuant to the exercise of
this  Warrant  shall be made  either  in  cash,  by  certified  check or by wire
transfer.  If the person or entity  exercising  this  Warrant is not the Holder,
such  person  or  entity  shall  also  deliver,  with the  notice  of  exercise,
appropriate  proof of the  right of such  person  or  entity  to  exercise  this
Warrant. An attempt to exercise this Warrant granted hereunder other than as set
forth above shall be invalid and of no force and effect. Promptly
<PAGE>
after exercise of this Warrant as provided for above, Orion shall deliver to the
person  exercising this Warrant a certificate or certificates  for the shares of
Orion  Common Stock being  purchased.  In the event this Warrant is exercised in
part only, Orion shall, upon surrender of this Warrant for cancellation, execute
and  deliver to the Holder a new Warrant of like tenor  evidencing  the right of
the Holder to purchase the balance of the shares of Orion  Common Stock  subject
to  purchase  hereunder.   Such  stock  certificate  or  certificates  shall  be
appropriately  legended to the extent  required  by federal or state  securities
laws.  All shares of Orion  Common  Stock  issued upon  exercise of this Warrant
shall be duly authorized and validly issued, fully paid and nonassessable.

                4. Transferability.   This Warrant may not be transferred by the
Holder in whole or in part,  other than to an affiliate  of the Holder,  without
the prior written consent of Orion.

                5. Reservation of Stock; Compliance. Orion hereby agrees that at
all times there shall be reserved for issuance  and/or delivery upon exercise of
this Warrant,  free from preemptive rights,  such number of shares of authorized
but  unissued or treasury  shares of Orion Common Stock as shall be required for
issuance or delivery  upon exercise of this  Warrant.  Orion further  agrees (i)
that it will not, by amendment to its certificate of  incorporation or bylaws or
through any other action,  avoid or seek to avoid the  observance or performance
of any of the covenants or  conditions to be observed or performed  hereunder by
Orion, and (ii) promptly to take all action as may from time to time be required
in order to permit  the  Holder to  exercise  this  Warrant  and Orion  duly and
effectively to issue shares of Orion Common Stock hereunder.

                6.  Effect of Changes in Capitalization.

                       A. Changes in Stock.   If the outstanding shares of Orion
Common Stock are  increased  or  decreased  or changed  into or exchanged  for a
different number or kind of shares or other securities of Orion by reason of any
recapitalization,   reclassification,   stock  split-up,  reverse  stock  split,
combination of shares,  exchange of shares, stock dividend or other distribution
payable in capital stock,  or other increase or decrease in such shares effected
without receipt of  consideration  by Orion  occurring after the date hereof,  a
proportionate  and appropriate  adjustment  shall be made by Orion in the number
and kind of shares subject to this Warrant,  so that the proportionate  interest
of the Holder immediately following such event shall, to the extent practicable,
be the same as  immediately  prior to such event.  Any such  adjustment  in this
Warrant shall not change the total Exercise Price with respect to shares subject
to the  unexercised  portion of this Warrant but shall  include a  corresponding
proportionate adjustment in the Exercise Price per share.



                                      - 2 -


<PAGE>

                       B.  Merger, Consolidation or Sale.  Subject to Subsection
C of this Section 6, in the event of any Sale  Transaction  (as defined  below),
this  Warrant  shall  pertain  to and  apply to the  cash,  securities  or other
consideration  to which a holder of the number of shares of Orion  Common  Stock
subject to this Warrant would have been entitled immediately following such Sale
Transaction, with a corresponding proportionate adjustment of the Exercise Price
per share so that the aggregate  Exercise Price  thereafter shall be the same as
the aggregate  Exercise  Price of the shares  remaining  subject to this Warrant
immediately prior to such reorganization, merger or consolidation.

                       For purposes of this Warrant, a "Sale Transaction"  shall
mean (i) the dissolution or liquidation of Orion,  (ii) a merger,  consolidation
or  reorganization  of  Orion  with  one or more  other  corporations  in  which
stockholders  of Orion  receive cash or securities  of another  corporation  for
their stock in Orion,  (iii) a sale of substantially  all of the assets of Orion
to another corporation, or another transaction (including, without limitation, a
merger or reorganization in which Orion is the surviving  corporation)  approved
by the Board of Directors of Orion which  results in any person or entity owning
80  percent  or more of the  combined  voting  power of all  classes of stock of
Orion.

                       C. Proposed Reorganization with Orion Newco.  The parties
acknowledge  that Orion is presently  contemplating a transaction (the "Proposed
Holding Company Formation") in which, among other things, Orion would merge with
a subsidiary  of a newly formed  company,  Orion Newco  Services,  Inc.  ("Orion
Newco"),  which has no significant  assets or  liabilities,  in which merger (i)
stockholders  of Orion  would  receive  substantially  identical  stock in Orion
Newco,  (ii) the common  stock of Orion Newco would become  publicly  traded and
Orion would be a wholly-owned  subsidiary of Orion Newco, which would become the
parent holding company of Orion.  For the avoidance of doubt,  the parties agree
that the Proposed  Holding Company  Formation would be a Sale  Transaction,  and
upon consummation of the Proposed Holding Company Formation,  this Warrant would
cease to be  exercisable  for Common Stock of Orion and instead would pertain to
and apply to the common  stock of Orion  Newco (and  other  securities  or other
consideration, if any) to which a holder of the number of shares of Orion Common
Stock  subject to this Warrant would have been  entitled  immediately  following
such Proposed  Holding Company  Formation,  with a  corresponding  proportionate
adjustment of the Exercise Price per share so that the aggregate  Exercise Price
thereafter  shall  be the same as the  aggregate  Exercise  Price of the  shares
remaining  subject to this Warrant  immediately  prior to the  Proposed  Holding
Company Formation.

                       E. Adjustments.  Adjustments  specified  in this  Section
6 shall be made by the Board of Directors of Orion, whose  determination in that
respect shall be final,  binding and conclusive.  No fractional  shares of Orion
Common Stock or units of other  securities  shall be issued pursuant to any such
adjustment, and


                                      - 3 -
<PAGE>
any fractions  resulting  from any such  adjustment  shall be eliminated in each
case, with cash being paid (at fair market value as reasonably determined by the
Board of Directors of Orion) in lieu of such fractions

                7.  General  Restrictions.  Orion shall not be required to issue
any shares of Orion Common Stock under this Warrant Agreement if the issuance of
such shares would constitute a violation by Orion of any provision of any law or
regulation of any governmental  authority,  including  without  limitation,  the
registration  or  qualification  requirement  of  applicable  federal  and state
securities laws or regulations. If at any time Orion shall determine, based upon
a written opinion of securities counsel,  that the registration or qualification
of any shares subject to this Warrant under any applicable  state or federal law
is necessary as a condition of, or in connection  with,  the issuance of shares,
this Warrant may not be  exercised in whole or in part unless such  registration
or qualification shall have been effected or obtained free of any conditions not
reasonably  acceptable  to Orion,  and any delay caused  thereby shall in no way
affect the date of termination of this Warrant.  Specifically in connection with
the  Securities  Act of 1933 (as now in effect  or as  hereafter  amended)  (the
"Securities Act"),  unless a registration  statement under the Securities Act is
in effect  with  respect to the  shares of Orion  Common  Stock  covered by this
Warrant,  Orion shall not be  required to issue such shares  unless the Board of
Directors of Orion has received evidence reasonably  satisfactory to it that the
holder of this  Warrant may acquire such shares  pursuant to an  exemption  from
registration under the Securities Act. Orion may, but shall in no event,  unless
otherwise  agreed in writing by Orion,  be obligated to, register any securities
covered hereby  pursuant to the  Securities  Act. Orion shall use its reasonable
efforts  to cause  the  exercise  of this  Warrant  and the  issuance  of shares
pursuant  thereto  to  comply  with  any  applicable  law or  regulation  of any
governmental authority; provided, however, that Orion may, but shall in no event
be obligated to,  register any securities  covered hereby under federal or state
securities laws. As to any jurisdiction  that expressly  imposes the requirement
that this Warrant shall not be exercisable  unless and until the shares of Orion
Common  Stock  covered  by this  Warrant  are  registered  or are  subject to an
available  exemption  from  registration,  the exercise of this  Warrant  (under
circumstances  in which  the laws of such  jurisdiction  apply)  shall be deemed
conditioned upon the  effectiveness of such  registration or the availability of
such an exemption.

                  8.  Divisibility: Combination. This Warrant may, at the option
of the Holder,  without expense,  be divided into or combined with other Warrant
for Orion  Common  Stock which carry the same  rights.  Upon  surrender  of this
Warrant  and any such other  Warrant  to Orion  together  with a written  notice
signed by the Holder and  specifying  the names and  denominations  for not less
than 1,000  shares of Orion  Common Stock in which new Warrant are to be issued,
Orion shall execute and deliver new Warrant,  as requested  entitling the Holder
or Holders  thereof to  purchase in the  aggregate  the same number of shares of
Orion Common Stock purchasable  hereunder and under any such other Warrant.  The
term "Warrant" as


                                     - 4 -

<PAGE>

used  herein  includes  any  Warrant  into which this  Warrant may be divided or
combined.

                9. Applicable Law.    This  Warrant  shall be  governed  by  and
construed  in  accordance  with the laws of the State of Delaware  except to the
extent federal law may be applicable.

                10. Reports.   Orion shall deliver to the Holder,  promptly upon
the  mailing  thereof  to the  stockholders  of Orion  generally,  copies of all
financial statements,  reports and proxy statements so mailed, and shall deliver
to the Holder such other  information  that Orion may produce in written form in
the ordinary  course of its business which is available to stockholders of Orion
generally and which the Holder reasonably requests.

                IN WITNESS WHEREOF,  Orion  has caused  this  Warrant to be duly
executed on the day and year set forth below.



DATED: December  __, 1996


[SEAL]                                  ORION NETWORK SYSTEMS, INC.

ATTEST:
                                        By
                                           -------------------------------------
- ----------------------------------      Its
                                            ------------------------------------







                                      - 5 -



- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------







                           ORION NEWCO SERVICES, INC.

                                   $60,000,000

                   Convertible Junior Subordinated Debentures
             Due February 1, 2012 (Interest Payable in Common Stock)





                          -----------------------------

                          DEBENTURE PURCHASE AGREEMENT
                          -----------------------------



                          Dated as of January 13, 1997







- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------




<PAGE>



                                Table of Contents
                                -----------------
<TABLE>
<CAPTION>

                                                                                                               Page
                                                                                                               ----


<S>     <C>                                                                                                      <C>
1.       Issuance of Debentures and the Subsidiary Guarantee....................................................  1
         1.1.       The Debentures..............................................................................  1
         1.2.       Sale of Debentures..........................................................................  1
         1.3.       The Subsidiary Guarantee....................................................................  2

2.       Closing................................................................................................  2

3.       Use of Proceeds........................................................................................  2

4.       Conditions to Closing..................................................................................  2
         4.1.       Representations and Warranties..............................................................  2
         4.2.       Exchange Agreement..........................................................................  3
         4.3.       Merger Transaction..........................................................................  3
         4.4.       Financing Transaction.......................................................................  3
         4.5.       Termination of Your Prior Obligations.......................................................  3
         4.6.       Subsidiary Guarantee........................................................................  4
         4.7.       Registration Rights.........................................................................  4
         4.8.       Opinions of Counsel.........................................................................  4
         4.9.       Matra Incentive Payments....................................................................  5
         4.10.      Senior Notes................................................................................  5
         4.11.      Terms of the Merger; Capitalization.........................................................  5
         4.12.      HSR Clearance...............................................................................  5
         4.13.      Investment by Each Purchaser................................................................  5
         4.14.      Termination.................................................................................  5

5.       Representations, Warranties and Agreements of the Company and ONS......................................  6
         5.1.       Incorporation, Standing, etc................................................................  6
         5.2.       Capital Stock...............................................................................  7
         5.3.       Subsidiaries................................................................................  7
         5.4.       Qualification...............................................................................  8
         5.5.       Business; Financial Statements..............................................................  8
         5.6.       Solvency....................................................................................  8
         5.7.       Authorization of Agreement..................................................................  8
         5.8.       Authorization of Common Stock...............................................................  9
         5.9.       Absence of Defaults and Conflicts...........................................................  9
         5.10.      Absence of Labor Dispute.................................................................... 10
         5.11.      Absence of Proceedings...................................................................... 10
         5.12.      Possession of Licenses and Permits.......................................................... 10
         5.13.      Environmental Laws.......................................................................... 11

                                       (i)

<PAGE>


                                                                                                               Page

         5.14.      No Violations of Laws....................................................................... 12
         5.15.      Internal Accounting Controls................................................................ 12
         5.16.      Tax Returns and Payments.................................................................... 12
         5.17.      Indebtedness................................................................................ 12
         5.18.      Title to Properties; Liens.................................................................. 13
         5.19.      Patents, Trademarks, Authorizations, etc.................................................... 13
         5.20.      Governmental Consents; Exercise of Voting Rights, etc....................................... 13
         5.21.      Offer of Debentures......................................................................... 14
         5.22.      Federal Reserve Regulations................................................................. 14
         5.23.      Investment Company Act...................................................................... 14
         5.24.      Public Utility Holding Company Act.......................................................... 14
         5.25.      Compliance with ERISA....................................................................... 14
         5.26.      Disclosure.................................................................................. 15
         5.27.      HSR Act Filings............................................................................. 16
         5.28.      Certificate of Incorporation................................................................ 16

6.       Representations, Warranties and Agreements of Purchasers............................................... 17
         6.1.       Investment Representations.................................................................. 17
         6.2.       ERISA....................................................................................... 17
         6.3.       HSR Act Filings............................................................................. 17

7.       Accounting; Financial Statements; Other Information.................................................... 17
         7.1.       Accounting; Financial Statements and Other Information...................................... 17
         7.2.       Company Certificate......................................................................... 19
         7.3.       Accountant's Certificate.................................................................... 19

8.       Inspection............................................................................................. 20

9.       Confidential Treatment................................................................................. 21

10.      ERISA.................................................................................................. 21

11.      Redemption of Debentures; Repurchase Rights; Mandatory Sales........................................... 22
         11.1.      Right of Redemption......................................................................... 22
         11.2.      Company Right of Redemption................................................................. 22
         11.3.      Redemption and Repurchase Rights upon Change of Control Event............................... 22
         11.4.      Mandatory Sale.............................................................................. 23
         11.5.      Restriction on Conversion Rights; Withdrawal of Notice...................................... 24

12.      Business Covenants..................................................................................... 26
         12.1.      Payment of Debentures and Maintenance of Office............................................. 26
         12.2.      Payment of Taxes and Claims................................................................. 26

                                      (ii)

<PAGE>


                                                                                                               Page

         12.3.      Maintenance of Properties and Corporate Existence........................................... 27
         12.4.      Compliance with Law......................................................................... 28
         12.5.      [Reserved.]................................................................................. 28
         12.6.      When Company May Merge, Etc................................................................. 28
         12.7.      Listing..................................................................................... 28
         12.8.      Issuances of Guarantees by New Restricted Subsidiaries...................................... 29
         12.9.      Subsidiaries................................................................................ 29
         12.10.     Notice...................................................................................... 29
         12.11.     Waiver of Stay, Extension or Usury Laws..................................................... 29

13.      Financial Covenants.................................................................................... 29
         13.1.      Merger and Sale of Assets................................................................... 29
         13.2.      Transactions with Affiliates................................................................ 31
         13.3.      Tax Consolidation........................................................................... 31
         13.4.      Compliance with ERISA....................................................................... 31
         13.5.      Limitation on Indebtedness.................................................................. 32
         13.6.      Limitation on Restricted Payments........................................................... 34
         13.7.      Limitation on the Issuance and Sale of Capital Stock of Restricted
                    Subsidiaries................................................................................ 36
         13.8.      Issuances of Guarantees by New Restricted Subsidiaries...................................... 36
         13.9.      Limitation on Liens......................................................................... 36
         13.10.     Limitation on Sale-Leaseback Transactions................................................... 37
         13.11.     Limitation on Asset Sales................................................................... 37
         13.12.     Insurance................................................................................... 38

14.      Subordination of Debentures............................................................................ 39
         14.1.      Debentures Subordinated to Senior Indebtedness.............................................. 39
         14.2.      Liquidation; Dissolution; Bankruptcy........................................................ 39
         14.3.      Default on Senior Indebtedness.............................................................. 40
         14.4.      Payment Permitted If No Default............................................................. 42
         14.5.      Subrogation to Rights of Holders of Senior Indebtedness..................................... 42
         14.6.      Provisions Solely to Define Relative Rights................................................. 42
         14.7.      Enforcement of Subordination By Holders of Senior Notes; No Waiver
                    of Subordination Provisions................................................................. 43
         14.8.      Reliance on Judicial Order or Certificate of Liquidating Agent.............................. 44
         14.9.      Certain Conversions Deemed Payment.......................................................... 44
         14.10.     Not to Prevent Events of Default............................................................ 44

15.      Conversion Rights...................................................................................... 44
         15.1.      Conversion Privilege and Conversion Rate.................................................... 44
         15.2.      Exercise of Conversion Privilege; Time Conversion Deemed Effected;
                    Delivery of Stock Certificates; Partial Conversions; Accrued Interest....................... 45

                                      (iii)

<PAGE>


                                                                                                               Page

         15.3.      Fractions of Shares......................................................................... 45
         15.4.      Adjustments to Conversion Rate.............................................................. 46
         15.5.      Effect on Conversion Price of Certain Events................................................ 50
         15.6.      De Minimis Adjustments...................................................................... 53
         15.7.      Notice of Adjustments of Conversion Rate.................................................... 53
         15.8.      Notice of Certain Corporate Action.......................................................... 53
         15.9.      Company to Reserve Common Stock............................................................. 54
         15.10.     Taxes on Conversions........................................................................ 54
         15.11.     Agreements as to Common Stock; Listing...................................................... 54
         15.12.     Cancellation of Converted Debentures........................................................ 55
         15.13.     Provision in Case of Consolidation, Merger or Conveyance of Assets.......................... 55
         15.14.     Other Dilutive Events....................................................................... 56
         15.15.     Continuing Obligation of the Company........................................................ 57

16.      Registration, Transfer and Substitution of Debentures.................................................. 57
         16.1.      Debenture Register; Ownership of Registered Debentures...................................... 57
         16.2.      Transfer and Exchange of Debentures......................................................... 57
         16.3.      Replacement of Debentures................................................................... 57

17.      Payment................................................................................................ 58
         17.1.      Form of Payment............................................................................. 58
         17.2.      Place of Payment............................................................................ 58
         17.3.      Home Office Payment......................................................................... 58

18.      Events of Default; Acceleration........................................................................ 59
         18.1.      Nature of Events and Acceleration of Debentures............................................. 59
         18.2.      Default Remedies............................................................................ 61
         18.3.      Notice of Default........................................................................... 62
         18.4.      Annulment of Acceleration of Debentures..................................................... 62
         18.5.      Accelerations and other Remedies Limited Prior to Senior Notes
                    Reduction Date.............................................................................. 62

19.      Interpretation of Agreement and Debentures............................................................. 63
         
20.      Expenses............................................................................................... 85

21.      Survival............................................................................................... 86

22.      Amendments and Waivers................................................................................. 86

23.      Notices................................................................................................ 87

                                      (iv)

<PAGE>


                                                                                                               Page


24.      Substitution of Purchaser.............................................................................. 87

25.      Execution in Counterparts.............................................................................. 87

27.      GOVERNING LAW.......................................................................................... 87

28.      Consent to Jurisdiction; Appointment of Agent to Accept Service of Process............................. 88

29.      WAIVER OF JURY TRIAL................................................................................... 89

</TABLE>

                                       (v)

<PAGE>



Schedule I          -      Schedule of Purchaser(s)

Schedule II         -      Exceptions to Section 5.11


Exhibit A           -      Form of Debenture

Exhibit B           -      Form of Subsidiary Guarantee

Exhibit C           -      Registration Rights Agreement

Exhibit D           -      Information Relating to Subsidiaries




                                      (vi)

<PAGE>



                           ORION NEWCO SERVICES, INC.




                                                         as of January 13 , 1997
                                                                      

British Aerospace Holdings, Inc.
15000 Conference Center Drive
Chantilly, Virginia  20151

Matra Marconi Space UK Limited
The Grove
Warren Land
Stanmore, Middlesex, HA7 4LY
England


Dear Sirs:

         ORION NEWCO SERVICES,  INC., a Delaware corporation  (herein,  together
with its  successors  and  assigns,  called the  "Company"),  and ORION  NETWORK
SYSTEMS, INC., a Delaware corporation ("ONS"), agree with you as follows:

         1.       Issuance of Debentures and the Subsidiary Guarantee.
                  ---------------------------------------------------
                  1.1. The Debentures. The Company has duly authorized the issue
and sale of $60,000,000 in aggregate  principal amount of its Convertible Junior
Subordinated  Debentures Due February 1, 2012 (Interest Payable in Common Stock)
(such  Debentures,  together  with all  Debentures  issued  in  substitution  or
exchange   therefor   pursuant  to  this   Agreement,   are  herein  called  the
"Debentures").  Each  Debenture  will bear interest from the date thereof on the
unpaid principal amount thereof at the rate specified therein, payable in Common
Stock  semi-annually on the first day of February and the first day of August of
each year  commencing  with August 1, 1997, will mature on February 1, 2012, and
will be in  substantially  the form of  Exhibit  A  attached  hereto,  with such
changes thereto,  if any, as may be approved by you.  Capitalized terms used and
not otherwise defined herein shall have the respective meanings assigned thereto
in Section 19.

                  1.2.      Sale of Debentures.
                            ------------------
                  (a) The Company will issue and sell to BAe and, subject to the
terms and conditions  hereof,  BAe will purchase from the Company at the Closing
provided  for in Section 2,  Debentures  in the  aggregate  principal  amount of
$50,000,000  at the  purchase  price  of one  hundred  percent  (100%)  of  such
principal amount.



<PAGE>



                  (b) The Company  will issue and sell to Matra and,  subject to
the terms and  conditions  hereof,  Matra will  purchase from the Company at the
Closing provided for in Section 2, Debentures in the aggregate  principal amount
of  $10,000,000  at the  purchase  price of one hundred  percent  (100%) of such
principal amount.

                  1.3. The Subsidiary Guarantee.  The Guarantors,  no later than
the Closing Date (as hereinafter defined), shall have taken all necessary action
to  authorize  the issuance of their  unconditional  guarantee of payment of the
Debentures as set forth in the Subsidiary  Guarantee and to make their guarantee
of the  Debentures  the  enforceable  obligation it purports to be in accordance
with the terms of the  Subsidiary  Guarantee.  The  Subsidiary  Guarantee is not
effective or enforceable against the Guarantors until the Senior Notes Reduction
Date. The Subsidiary  Guarantee will become  effective and  enforceable  against
each of the  Guarantors on the Senior Notes  Reduction  Date without any further
action by any party.

         2. Closing.  The closing of the sale of the  Debentures to be purchased
by each  Purchaser  (the  "Closing")  shall take place at the offices of Coudert
Brothers,  1114 Avenue of the Americas,  New York, New York 10036 at 10:00 a.m.,
New York City time,  (or at such other time and place as the parties  hereto may
agree) on the date on which the Financing  Transaction  is closed  provided that
each of the  conditions in Section 4 have been  satisfied  prior to such date or
are to be satisfied  concurrently  with the Closing (the "Closing Date"). At the
Closing  the  Company  will  deliver  to each  Purchaser  the  Debentures  to be
purchased by such Purchaser,  in the form of a single Debenture (or such greater
number of Debentures in denominations of at least $100,000 as such Purchaser may
request), dated the Closing Date and registered in such Purchaser's name (or the
name of such  Purchaser's  nominee),  against  delivery by such Purchaser to the
Company of the purchase price therefor by the same method of payment utilized in
the closing of the  Financing  Transaction.  If at the Closing the Company shall
fail to tender such  Debentures to a Purchaser as provided in this Section 2, or
any of the  conditions  specified in Section 4 shall not have been  fulfilled to
such  Purchaser's  satisfaction,  such  Purchaser  shall,  at its  election,  be
relieved  of all  further  obligations  under this  Agreement,  without  thereby
waiving any other  rights such  Purchaser  may have by reason of such failure or
such non-fulfillment.

         3. Use of Proceeds.  The proceeds of the sale of the Debentures will be
used to pay amount under the contracts for the construction of Orion 2 and Orion
3 and to provide working capital to the Company.

         4. Conditions to Closing.  Each Purchaser's  obligation to purchase and
pay for the  Debentures  to be  purchased  by such  Purchaser  is subject to the
fulfillment to such  Purchaser's  satisfaction,  prior to or at the Closing,  of
each of the following conditions:

            4.1.   Representations  and  Warranties.   The  representations  and
warranties of the Company,  ONS and their respective  Subsidiaries  contained in
this  Agreement  shall be correct  as of the date  hereof and at the time of the
Closing. Alternatively,  the Company (and if applicable ONS) shall have made, in
writing, for the benefit of you and any other holder of

                                       -2-

<PAGE>



Debentures,  the same  representations,  warranties  and  agreements  as made to
Morgan Stanley & Co. Incorporated  ("Morgan") in the underwriting agreement with
respect to the sale of the Senior Notes (the "Underwriting  Agreement"),  except
that such representations, warranties and agreements shall be made in connection
with (and with reference to) the offer,  sale,  delivery and  performance of the
Debentures and this Agreement (including,  without limitation,  the issuance and
delivery  of  Conversion  Shares  and  Interest  Shares  as  required  under the
Debentures),  rather  than  with  respect  to  the  offer,  sale,  delivery  and
performance   of  the  Senior  Notes,   as  the  context   requires,   and  such
representations and warranties shall have been correct as of the date first made
and at the time of Closing.  If the Company or ONS shall make for the benefit of
you and  other  holders  of  Debentures  such  representations,  warranties  and
agreements in the Underwriting  Agreement,  the representations,  warranties and
agreements  set forth in Sections  5.1 through  5.28 hereof shall not be updated
through the Closing Date. In either case,  each Purchaser  shall have received a
certificate,  dated the Closing Date and signed by the Secretary of the Company,
certifying  as  to  the  correctness  of  the  applicable   representations  and
warranties.

            4.2.  Exchange  Agreement.  The  transactions  provided  for  in the
Exchange Agreement shall be completed prior to or concurrently with the Closing.

            4.3. Merger  Transaction.  The Merger Transaction shall be completed
prior to or concurrently with the Closing.

            4.4.  Financing  Transaction.  The  Financing  Transaction  shall be
completed prior to or concurrently with the Closing.

            4.5. Termination of Your Prior Obligations.
                 -------------------------------------
                  (a) As a condition to BAe's obligation to purchase and pay for
the  Debentures  to be purchased by BAe,  the  obligations  of (i) BAC under the
Communications Satellite Capacity Agreement dated as of December 20, 1991 by and
between  Orion  Atlantic and BAC, and the  Contingent  Communications  Satellite
Capacity  Agreement,  dated as of  December  20,  1991,  by and  between,  Orion
Atlantic  and BAC and (ii) British  Aerospace  Plc ("PLC")  under the  Guarantee
Agreement  dated as of February 19, 1992 between and among PLC,  Orion  Atlantic
and The Chase  Manhattan  Bank  (National  Association),  as agent,  (including,
without limitation, all payment obligations,  guarantees or other credit support
obligations  under or related to each such agreement) shall have been terminated
and be of no further  force or effect and a termination  of guarantee  agreement
and termination of capacity agreements  contracts,  substantially in the form of
the exhibits attached to the Exchange  Agreement,  in respect of the termination
of the obligations of PLC and BAC, respectively, shall be executed and delivered
prior to or concurrently with the Closing.

                  (b) As a condition to Matra's  obligation  to purchase and pay
for the  Debentures  to be purchased by Matra,  the  obligations  of (i) MCN Sat
Service S.A. under the  Communications  Satellite Capacity Agreement dated as of
December 20, 1991 by and between Orion  Atlantic and MCN Sat Service S.A.,  (ii)
MCN Sat

                                       -3-

<PAGE>


US, Inc. under the Contingent  Communications Satellite Capacity Agreement dated
as of December  20, 1991 by and between  Orion  Atlantic  and MCN Sat US,  Inc.,
(iii) Lagardere  Groupe SCA (formerly Matra S.A.) under the Guarantee  Agreement
dated as of February 19, 1992 between and among  Lagardere  Groupe SCA (formerly
Matra S.A.), Orion Atlantic and The Chase Manhattan Bank (National Association),
as agent,  and (iv)  Lagardere  Groupe SCA under the Guaranty  Agreement,  dated
April 2, 1992  between  Lagardere  Groupe SCA  (formerly  Matra  S.A.) and Orion
Atlantic (including, without limitation, all payment obligations,  guarantees or
other credit support  obligations under or related to each such agreement) shall
have been  terminated  and be of no further force or effect and a termination of
guarantee  agreements and termination of capacity  agreements,  substantially in
the form of the exhibits attached to the Exchange  Agreement,  in respect of the
termination  of the  obligations  of MCN Sat US, Inc. and MCN Sat Service  S.A.,
respectively,  shall be executed and delivered prior to or concurrently with the
Closing.

                  4.6.   Subsidiary    Guarantee.    A   Subsidiary    Guarantee
substantially  in the form of Exhibit B attached  hereto,  shall be executed and
delivered to each Purchaser by each of the Guarantors.  The parties hereto agree
that  the  Subsidiary  Guarantee  may,  at  your  sole  option,  be  amended  to
incorporate  from any  subsidiary  guarantee  provisions  for the benefit of the
holders of the Senior Notes, any additional or, in your opinion,  more favorable
terms than those  appearing in the  Subsidiary  Guarantee,  provided that, in no
event, will the Subsidiary  Guarantee become effective prior to the Senior Notes
Reduction Date.

                  4.7.  Registration Rights. (i) A Registration Rights Agreement
with respect to the Conversion  Shares,  the Interest Shares,  and certain other
shares specified therein substantially in the form of Exhibit C attached hereto,
shall have been executed by each  Purchaser and the Company and (ii) the Company
or ONS shall have obtained all agreements,  amendments,  consents or waivers, in
form and  substance  satisfactory  to each  Purchaser,  from the  holders of any
registration rights granted pursuant to any prior registration rights agreements
(or any such agreement entered into in connection with the Merger Transaction or
the  Financing  Transaction)  with the Company or ONS as  necessary to allow you
(and each other holder of Debentures)  their  registration  rights in accordance
with the terms of the Registration Rights Agreement.

                  4.8. Opinions of Counsel. The Purchasers shall have received a
favorable opinion, dated the Closing Date and satisfactory in form and substance
to the Purchasers, from Hogan & Hartson L.L.P., special counsel for the Company,
which shall opine as to offer and sale of the Debentures.  Such opinion shall be
deemed to be in form and substance satisfactory to the Purchasers if the opinion
provided is the same as the opinion provided by Hogan & Hartson L.L.P. to Morgan
under the  Underwriting  Agreement in connection  with the offer and sale of the
Senior Notes, except that the opinion delivered to the Purchasers shall opine as
to the  Debentures  (including,  without  limitation,  as to the issuance of the
Conversion Shares and Interest Shares) and the Subsidiary  Guarantee in addition
to or in place of the Senior Notes and the guarantee  thereof and shall refer to
the Purchasers and the Debentures  (including the Conversion Shares and Interest
Shares),  rather than to Morgan and the Senior Notes,  as the context  requires.
BAe shall also have  received a favorable  opinion,  dated the Closing  Date and
satisfactory  in form and  substance to BAe, from Hogan & Hartson  L.L.P.  which
shall opine as to the  applicability  of Section 16 of the  Exchange  Act to the
receipt of Conversion Shares and

                                       -4-

<PAGE>



Interest  Shares by BAe and the receipt by BAC of stock dividends on, and shares
issued upon conversion of, the Series C Preferred Stock.

                  4.9.  Matra  Incentive  Payments.  As a  condition  to Matra's
obligation to purchase and pay for the Debentures to be purchased by Matra, ONS,
shall,  concurrently with the Closing, pay to Matra by wire transfer into a bank
account established by Matra in the United States of America, $13 million of the
payments  required  to be made  under  Articles  15.6.1 and 15.6.2 of the Second
Amended and Restated Purchase Contract,  dated 26 September 1991, as amended, by
and between Orion  Satellite  Corporation,  as general partner of Orion Atlantic
and Matra Marconi Space UK Limited.

                  4.10. Senior Notes. The material terms of the Senior Notes, as
set out on the Senior  Notes Term Sheet,  a copy of which has been  furnished to
you,  shall not have been amended or waived without your written  approval.  For
purposes of this  Section  4.10,  an  increase  in the size of the Senior  Notes
offering  shall not  constitute  an amendment or waiver  requiring  your written
approval.

                  4.11. Terms of the Merger; Capitalization.  The material terms
of the Merger Transaction, as described in the Registration Statement, a copy of
which has been  delivered to you and your special U.S.  counsel,  shall not have
been amended or waived without your written approval. Except for a proposed sale
of ONS Common Stock or Common Stock  previously  disclosed to you, and except as
specifically  contemplated  by the  Registration  Statement and the Senior Notes
Term Sheet,  there shall have been no material changes to the capital  structure
of either the Company or ONS and no material  increase or decrease in the number
of  outstanding  shares  of any  class of  capital  stock of  either  ONS or the
Company,  or in the  number  of (or terms of) any  options,  warrants,  or other
rights to acquire any shares of any class of capital  stock of either ONS or the
Company since January 10, 1997.

                  4.12.  HSR  Clearance.  As a condition to BAe's  obligation to
purchase and pay for the  Debentures to be purchased by BAe, any waiting  period
(including any extensions  thereof)  applicable to BAC's acquisition of Series C
Preferred  Stock pursuant to the Exchange  Agreement  shall have expired or been
terminated.

                  4.13. Investment by Each Purchaser. The purchase of Debentures
by  each  Purchaser  shall  be  completed  concurrently  with  the  purchase  of
Debentures by the other Purchaser.

                  4.14.     Termination.

                  (a) No  Closing.  Notwithstanding  anything  to  the  contrary
contained  in  this  Agreement,   this  Agreement  may  be  terminated  and  the
transactions  contemplated  hereby  may be  abandoned  at any time  prior to the
Closing:

                                      -5-

<PAGE>


                            (i)     By the mutual consent of all of the parties;

                            (ii) By a  Purchaser  at any time in the  event of a
                  material  breach or  material  default  by the  Company in the
                  observance  or  in  the  timely  performance  of  any  of  its
                  obligations hereunder which is not waived by such Purchaser;

                            (iii) By the  Company  at any time in the event of a
                  material  breach or  material  default by a  Purchaser  in the
                  observance  or in  the  timely  performance  of  any  of  such
                  Purchaser's  obligations  hereunder which is not waived by the
                  Company; or

                            (iv) If the  Closing  shall not have  occurred on or
                  before  April 30, 1997,  without any further  action by you or
                  the Company.

Except as provided in paragraph (iv) above,  no  termination  under this Section
4.14 shall be effective  unless and until the  terminating  party gives  written
notice of such termination to the other parties.

                  (b) Failure to Notify. If the Closing shall not actually occur
on any date on which the Closing is scheduled to occur (the  "Scheduled  Closing
Date")  (other  than by reason  of your  failure  to  purchase  Debentures  duly
tendered), and the Company shall have failed to notify Coudert Brothers prior to
12:00 p.m., New York City time, on such Scheduled Closing Date that such Closing
has been postponed,  the Company shall pay to each Purchaser by wire transfer of
immediately available funds to the bank account designated by such Purchaser (if
such Purchaser incurs any loss of funds or administrative costs, as compensation
for such loss of funds and administrative  costs) an amount equal to interest on
the aggregate  purchase  price for the Debentures to have been purchased by such
Purchaser on such  Scheduled  Closing Date,  at the  effective  rate of interest
equal to eight and three-quarters percent (8 3/4%) per annum, less the overnight
Federal funds rate, for each day from and including such Scheduled  Closing Date
to and including the earlier of the date on which such Closing  actually  occurs
or the date on which the  amount to be paid by such  Purchaser  as the  purchase
price of such  Debentures  is  available  to such  Purchaser  for  reinvestment,
provided, that the Company shall pay to such Purchaser in any case not less than
one day's interest at such specified rate.

         5.  Representations,  Warranties and Agreements of the Company and ONS.
Each of ONS and the Company represents, warrants and agrees as follows:

                  5.1.   Incorporation,   Standing,   etc.   The  Company  is  a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has all requisite  corporate power and authority to
own and operate its properties, to carry on its business as now conducted and as
presently proposed to be conducted,  to enter into this Agreement,  to issue and
sell the Debentures,  to issue the Conversion Shares and the Interest Shares and
to carry out the terms of this Agreement and the Debentures. The Company has, by
all necessary  corporate  action,  duly authorized the execution and delivery of
this  Agreement 

                                      -6-

<PAGE>
and of the Debentures and the performance of its obligations hereunder and under
the  Debentures  (including,  without  limitation,  the issuance and sale of the
Debentures and the issuance of the Conversion Shares and the Interest Shares).

                  5.2.      Capital Stock.
                            -------------
                  (a) As of January 10, 1997,  the  authorized  capital stock of
ONS consists of  40,000,000  shares of common  stock,  par value $0.01 per share
("ONS Common Stock"),  and 1,000,000  shares of preferred stock, par value $0.01
per share ("ONS  Preferred  Stock"),  of which  10,985,150  shares of ONS Common
Stock,  13,871  shares  of ONS  Series A 8%  Cumulative  Redeemable  Convertible
Preferred Stock ("ONS Series A Preferred  Stock") and 4,298 shares of ONS Series
B 8% Cumulative Redeemable  Convertible Preferred Stock ("ONS Series B Preferred
Stock") are duly authorized and validly issued and  outstanding,  fully paid and
nonassessable.  ONS has no  other  class  of stock  authorized  or  outstanding.
Options  and  warrants  to  purchase  947,330  shares  of ONS  Common  Stock are
outstanding  as of January 10,  1997,  and when such  options and  warrants  are
exercised and the prescribed exercise price paid, the shares of ONS Common Stock
issued  with  respect to such  options  and  warrants  will be duly  authorized,
validly issued, fully paid and nonassessable. Options to purchase 350,666 shares
of ONS Preferred Stock, the terms of which are to be substantially  identical to
the ONS Series A Preferred Stock and the ONS Series B Preferred Stock other than
the conversion  price,  are  outstanding  as of January 10, 1997.  Except as set
forth  above,  or in the  certificates  of  designations  of the  ONS  Series  A
Preferred  Stock  and ONS  Series  B  Preferred  Stock  and  related  investment
agreements,  as of January 10, 1997 there are no existing  options,  warrants or
rights to purchase or  otherwise  acquire  from ONS Capital  Stock of ONS of any
class,  no  outstanding  securities of ONS that are  convertible  into shares of
Capital  Stock of ONS of any  class,  and no  options,  warrants  or  rights  to
purchase from ONS any such  convertible  securities,  and ONS has no outstanding
contractual or other obligation to repurchase,  redeem or otherwise  acquire any
outstanding shares of its Capital Stock.

                  (b) ONS and the Company  agree that prior to the Closing  Date
there will be no material  increase  or  decrease  in the number of  outstanding
shares of any class of  Capital  Stock of either ONS or the  Company,  or in the
number of (or terms of) any  options,  warrants,  or other rights to acquire any
shares of any class of  Capital  Stock of either  ONS or the  Company  except in
connection  with a proposed sale of ONS Common Stock or Common Stock  previously
disclosed to you, or as specifically  contemplated by the Registration Statement
and the Senior Notes Term Sheet.

                  5.3. Subsidiaries.  Attached hereto as Exhibit D is a complete
and correct list of the  Subsidiaries  of the Company and ONS,  which  Exhibit D
correctly sets forth as to each Subsidiary (a) its name, (b) the jurisdiction of
its  organization and the  jurisdictions,  if any, in which it is qualified as a
foreign  corporation or foreign partnership and (c) the percentage of its issued
and outstanding shares of common stock, shares of beneficial interest or general
and  limited  partnership  interests  owned  by  the  Company,  ONS  or  another
Subsidiary  (specifying such 


                                       -7-

<PAGE>

other  Subsidiary).  Each corporate  Subsidiary is a corporation duly organized,
validly  existing and in good standing under the laws of the jurisdiction of its
incorporation,  and each limited partnership  Subsidiary is duly formed, validly
existing  and  in  good  standing  under  the  laws  of  its   jurisdiction   of
organization.  Each  Subsidiary has all requisite power and authority to own and
operate its  properties  and to carry on its  business as now  conducted  and as
presently  proposed to be conducted.  All the  outstanding  equity  interests or
partnership interests of, or shares of capital stock of, or shares of beneficial
interest in, each Subsidiary are duly authorized, validly issued, fully paid and
nonassessable,  and all such equity interests,  partnership  interests or shares
indicated in Exhibit D as owned by the Company, ONS or by another Subsidiary are
so owned  beneficially  and of record by the  Company or such other  Subsidiary,
free and clear, except as described in the Registration  Statement, of any Lien.
Upon the  completion  of the Merger  Transaction,  Exhibit D shall be amended to
include ONS as a Wholly Owned Subsidiary of the Company.

                  5.4.  Qualification.  The Company and ONS are, and each of the
Subsidiaries  listed on Exhibit D is, duly  qualified  and in good standing as a
foreign   corporation   or   partnership   authorized  to  do  business  in  the
jurisdictions indicated with respect to it in Exhibit D. Failure of the Company,
ONS or  any  of  their  respective  Subsidiaries  to so  qualify  in  any  other
jurisdiction would not, in any case or in the aggregate, have a Material Adverse
Effect.

                  5.5. Business; Financial Statements. The Company has delivered
to you complete and correct copies of (a) the annual report to  stockholders  of
ONS for the fiscal year ended December 31, 1995 (the "Annual  Report"),  (b) the
annual  report to the  Commission  of ONS on Form 10-K for the fiscal year ended
December 31, 1995 (the "10-K") and (c) the report to the  Commission  on ONS for
the fiscal quarter ended September 30, 1996 (the "10-Q").  The Annual Report and
the 10-K correctly  describe,  as of their  respective  dates, the business then
conducted  by ONS and its  Subsidiaries  and  proposed  to be  conducted  by the
Company, ONS and the Subsidiaries.  The 10-K includes the consolidated financial
statements  of ONS and the  Subsidiaries  for  each of the  fiscal  years  ended
December 31, 1994 and 1995  accompanied  by the report  thereon of Ernst & Young
LLP, certified public accountants.  All of said financial statements  (including
in each case the related  schedules  and notes)  fairly  present in all material
respects the consolidated  financial  position of ONS and the Subsidiaries as of
the respective dates specified in the 10-K and the consolidated results of their
operations and cash flows for the respective  periods so specified and have been
prepared in accordance  with GAAP  consistently  applied  throughout the periods
involved  except as set forth in the notes  thereto  and  subject in the case of
unaudited financial statements to normal recurring audit adjustments.

         5.6. Solvency. ONS and its Subsidiaries,  considered as one enterprise,
are  Solvent  and  immediately  after the  Closing  Date,  the  Company  and its
Subsidiaries, considered as one enterprise, will be Solvent.

         5.7.   Authorization  of  Agreement.   This  Agreement  has  been  duly
authorized, executed and delivered by each of the Company and ONS.

                                       -8-

<PAGE>

         5.8.  Authorization of Common Stock.  Upon issuance and delivery of the
Debentures in accordance with this Agreement, the Debentures will be convertible
at the option of the holders  thereof for shares of Common  Stock in  accordance
with the terms of the Debentures and this Agreement;  the Conversion  Shares and
the  Interest  Shares have been duly and validly  authorized  and  reserved  for
issuance upon payment of interest and upon conversion by all necessary corporate
action of the Company, and such shares, when issued upon such conversion or as a
payment of  interest in  accordance  with the terms of the  Debentures  and this
Agreement,  will  be  duly  and  validly  issued  and  will be  fully  paid  and
non-assessable;  no holder of such shares will be subject to personal  liability
solely by reason of being such a holder;  and the  issuance  of such shares upon
conversion  or as a payment  of  interest  in  accordance  with the terms of the
Debentures  and this  Agreement  will not be subject to the  preemptive or other
similar  rights of any  security  holder of the Company  arising by operation of
law, or under the Certificate of Incorporation or bylaws of the Company or under
any agreement to which the Company is a party or by which the Company is bound.

                  5.9.  Absence of Defaults and Conflicts.  None of the Company,
ONS or any of their respective Subsidiaries are in violation of their respective
certificates  of  incorporation,  bylaws  or other  charter  documents  or is in
default in the performance or observance of any material obligation,  agreement,
covenant or  condition  contained in any  contract,  indenture,  mortgage,  loan
agreement, note, lease or other instrument to which any of them is a party or by
which any of them may be bound, or to which any of the property or assets of the
Company, ONS or any of their Subsidiaries is subject (collectively,  "Agreements
and  Instruments")  except for such defaults that would not result in a Material
Adverse  Effect;  and the execution,  delivery and performance of this Agreement
and any other  Agreement or  Instrument  entered into or issued or to be entered
into or issued by the Company,  ONS or any of their  respective  Subsidiaries in
connection  with  the  transactions  contemplated  hereby  or  thereby,  and the
consummation of the transactions  contemplated  herein or therein (including the
issuance and sale of the  Debentures,  the use of the proceeds  from the sale of
the Debentures and the issuance of the  Conversion  Shares and Interest  Shares)
and  compliance by the Company with its  obligations  hereunder and  thereunder,
have been duly authorized by all necessary  corporate action and do not and will
not,  whether  with or without  the giving of notice or passage of time or both,
conflict  with or  constitute  a breach of, or default  or  Repayment  Event (as
defined  below)  under,  or result in the  creation or  imposition  of any lien,
charge or encumbrance upon any property or assets of the Company,  ONS or any of
their respective Subsidiaries pursuant to the Agreements and Instruments, except
for such conflicts,  breaches,  defaults,  Repayment Events or liens, charges or
encumbrances  that would not result in a Material Adverse Effect,  nor will such
action  result  in  any  violation  of the  provisions  of  the  Certificate  of
Incorporation,  bylaws or other charter documents of the Company,  ONS or any of
their respective  Subsidiaries or any applicable law, statute, rule, regulation,
judgment, order, writ or decree of any government, government instrumentality or
court, domestic or foreign,  having jurisdiction over the Company, ONS or any of
their respective  Subsidiaries or any of their assets or properties,  except for
such violations of law, statutes, rules, regulations,  judgments,  orders, writs
or decrees that would not result in a Material Adverse Effect. As used herein, a
"Repayment  Event"  means any event or  condition  which gives the holder of any
note,  debenture or other evidence of indebtedness (or 


                                       -9-

<PAGE>



any Person acting on such holder's  behalf) the right to require the repurchase,
redemption or repayment of all or a portion of such indebtedness by the Company,
ONS or any of the Subsidiaries.

                  5.10.  Absence of Labor  Dispute.  No labor  dispute  with the
employees of the Company,  ONS or any of the Subsidiaries exists or, to the best
of the  Company's  knowledge,  is  threatened  and the Company has not  received
notice of any existing or threatened  labor  disturbance by the employees of any
of the  principal  suppliers,  manufacturers,  customers or  contractors  of the
Company, ONS or any of their respective Subsidiaries, which, in either case, may
reasonably be expected to result in a Material Adverse Effect.

                  5.11.  Absence of  Proceedings.  There is no  action,  suit or
proceeding  before or by any court or governmental  agency or body,  domestic or
foreign,  now pending or, to the best of the  Company's  knowledge,  threatened,
against or affecting the Company, ONS or any of their respective Subsidiaries or
any of their  respective  officers or directors in their capacity as such or any
of their respective  property or assets, that is required to be disclosed in the
Registration  Statement  (other  than as  disclosed  therein),  or  which  might
reasonably be expected to result in any Material Adverse Effect,  or which might
reasonably be expected to have a Material  Adverse  Effect on the  properties or
assets  thereof  or  the   consummation  of  the  Financing   Transaction,   the
transactions  contemplated by this Agreement or the transactions contemplated in
the  Registration  Statement,  or the performance by the Company,  ONS or any of
their  respective  Subsidiaries of any obligation  hereunder or thereunder;  the
aggregate of all pending legal or governmental proceedings to which the Company,
ONS or any of their respective  Subsidiaries is a party or of which any of their
respective  property or assets is the  subject  which are not  described  in the
Registration Statement,  including ordinary routine litigation incidental to the
business,  could not  reasonably  be  expected  to result in a Material  Adverse
Effect.  Without  limiting the  foregoing,  except as otherwise set forth in the
Registration  Statement  and in  Schedule  II  hereto,  there  are no  legal  or
governmental   proceedings,   including   rulemaking   proceedings   of  general
applicability in the industry or industries in which the Company,  ONS or any of
their Subsidiaries operate, by or before the Federal  Communications  Commission
(the "FCC"),  any state public utility  commission or similar state governmental
agency  ("PUC") or any  international  body formed by treaty that is responsible
for coordinating and registering orbital slots to satellites,  including but not
limited to, the International  Telecommunication  Union ("ITU"), now pending or,
to the Company's best knowledge, threatened or contemplated,  which in each case
might  reasonably  be  expected to result in any  Material  Adverse  Effect.  In
addition,  all  applications,  reports  and other  filings  required to be filed
through  the  Execution  Date  with  the  FCC,  the  PUC,  the ITU or any  other
governmental or international authority, have been duly and timely filed and all
such applications, reports and other filings required to be filed by the Closing
Date will have been filed prior to the Closing Date.

                  5.12. Possession of Licenses and Permits. The Company, ONS and
the  Subsidiaries  possess  such  permits,  certificates,  licenses,  approvals,
consents,   orders  and  other   authorizations   (collectively,   "Governmental
Licenses") issued by the appropriate Federal, state, local or foreign regulatory
agencies or bodies  necessary  to conduct  the  business  now  operated 

                                      -10-       
                                                 
<PAGE>                                           
by them, except for such permits,  certificates,  licenses, approvals, consents,
orders and other  authorizations  the absence of which would not have a Material
Adverse  Effect;  the  Company,  ONS and their  respective  Subsidiaries  are in
compliance  with the terms and  conditions  of all such  Governmental  Licenses,
except  where  the  failure  so to  comply  would  not,  individually  or in the
aggregate,  have a Material Adverse Effect; all of the Governmental Licenses are
valid  and in full  force  and  effect,  except  where  the  invalidity  of such
Governmental Licenses or the failure of such Governmental Licenses to be in full
force and  effect  would not have a  Material  Adverse  Effect;  and none of the
Company, ONS or any of their respective  Subsidiaries has received any notice of
proceedings relating to the revocation, withdrawal, cancellation,  modification,
suspension or non-renewal of any such Governmental Licenses which,  individually
or in the  aggregate,  if the  subject  of an  unfavorable  decision,  ruling or
finding, would result in a Material Adverse Effect.

                  5.13.  Environmental Laws. None of the Company,  ONS or any of
their respective  Subsidiaries is in violation of any Federal,  state,  local or
foreign  statute,  law, rule,  regulation,  ordinance,  code,  policy or rule of
common law and any judicial or administrative  interpretation thereof, including
any judicial or administrative order, consent,  decree or judgment,  relating to
pollution or protection of human health,  the  environment  (including,  without
limitation,  ambient air, surface water, groundwater, land surface or subsurface
strata)  or  wildlife,  including,  without  limitation,  laws  and  regulations
relating  to  the  release  or  threatened  release  of  chemicals,  pollutants,
contaminants,  wastes,  toxic  substances,  hazardous  substances,  petroleum or
petroleum products (collectively,  "Hazardous Materials") or to the manufacture,
processing,  distribution,  use,  treatment,  storage,  disposal,  transport  or
handling of Hazardous Materials (collectively, "Environmental Laws"), except for
such  violations as would not,  individually  or in the  aggregate,  result in a
Material  Adverse Effect.  None of the Company,  ONS or any of their  respective
Subsidiaries  has received any notice from any  governmental  authority or third
party of an asserted  claim under any  Environmental  Law. The Company,  ONS and
their respective  Subsidiaries  have all permits,  authorizations  and approvals
required under any applicable Environmental Laws and are each in compliance with
their  requirements,  except for such permits,  authorizations and approvals the
absence  of which  would  not,  individually  or in the  aggregate,  result in a
Material  Adverse Effect.  There are no pending or, to the Company's  knowledge,
threatened  administrative,  regulatory  or judicial  actions,  suits,  demands,
demand  letters,   claims,   liens,   notices  of  noncompliance  or  violation,
investigation  or  proceedings  relating  to any  Environmental  Law against the
Company, ONS or any of their respective  Subsidiaries,  except for such actions,
suits,  demands,  demand letters,  claims,  liens,  notices of  noncompliance or
violation,  investigation  or  proceedings  which if  decided  adversely  to the
Company, ONS or any of their respective  Subsidiaries would not, individually or
in the  aggregate,  result  in a  Material  Adverse  Effect.  To the best of the
Company's knowledge,  there are no events or circumstances that might reasonably
be expected to form the basis of any order for  clean-up or  remediation,  or an
action,  suit or proceeding by any private party or governmental body or agency,
against or affecting the Company,  ONS or any of their  respective  Subsidiaries
relating to any Hazardous Materials or the violation of any Environmental Laws.

                                      -11-

<PAGE>

         5.14. No Violations of Laws.  None of the Company,  ONS or any of their
respective Subsidiaries has violated any foreign,  Federal or state law relating
to the  discrimination  in the hiring,  promotion  or pay of  employees  nor any
applicable  Federal or state wages and hours laws nor any other Federal or State
law  concerning  the  conditions  or the terms of  employment of employees by an
employer,  nor any provisions of ERISA or the rules and regulations  promulgated
thereunder  nor any  provisions  of the  U.S.  Communications  Act of  1934,  as
amended, nor the rules or regulations promulgated thereunder, nor any applicable
state  law or  regulation  concerning  intra-state  telecommunications  nor  any
foreign law or regulation  concerning  international  communications (such state
and foreign  laws and  regulations,  along with the U.S.  Communications  Act of
1934, as amended, and the regulations thereunder being referred to herein as the
"Communications  Laws"),  except for such violations as,  individually or in the
aggregate, will not have a Material Adverse Effect.

                  5.15. Internal  Accounting  Controls.  The books,  records and
accounts of the Company,  ONS and their respective  Subsidiaries  accurately and
fairly reflect, in all material respects, in reasonable detail, the transactions
in and  dispositions  of the  assets of the  Company,  ONS and their  respective
Subsidiaries.  The  Company,  ONS and  each  of  their  respective  Subsidiaries
maintain  a  system  of  internal  accounting  controls  sufficient  to  provide
reasonable  assurance  that (i)  transactions  are executed in  accordance  with
management's general or specific authorizations;  (ii) transactions are recorded
as necessary to permit  preparation of financial  statements in conformity  with
GAAP and to maintain asset  accountability;  (iii) access to assets is permitted
only in accordance with management's general or specific authorization; and (iv)
the  recorded  amount  for  assets  is  compared  with the  existing  assets  at
reasonable  intervals  and  appropriate  action  is taken  with  respect  to any
differences.

                  5.16. Tax Returns and Payments.  The Company,  ONS and each of
their respective  Subsidiaries have filed all income tax returns required by law
to be filed by them and have paid all taxes  shown to be due and payable on such
returns and all other taxes,  assessments,  fees and other governmental  charges
levied upon them and their respective properties,  assets, income and franchises
which are due and payable,  to the extent such taxes and assessments have become
due and payable and before they have become delinquent, except for any taxes and
assessments  (i) the  amount of which is not  individually  or in the  aggregate
Material or (ii) the  amount,  applicability  or validity of which is  currently
being  contested in good faith by  appropriate  proceedings  and with respect to
which the Company, ONS or any of their respective Subsidiaries,  as the case may
be, has  established  adequate  reserves in accordance  with GAAP.  The charges,
accruals  and  reserves  on the  books  of the  Company,  ONS and  any of  their
respective  Subsidiaries  in respect of Federal,  state and foreign income taxes
for all fiscal  periods are  adequate in the  reasonable  opinion of the Company
and, to the best of the Company's knowledge, there are no additional assessments
for such periods or any basis therefor.

                  5.17.  Indebtedness.  None of the Company, ONS or any of their
respective  Subsidiaries  is in default and no waiver of default is currently in
effect, in the payment of any principal, interest or premium on any Indebtedness
of the Company, ONS or any such Subsidiary and no event or condition exists with
respect to any  Indebtedness  of the  Company,  

                                      -12-                   
                                                             
<PAGE>    
                                                   
ONS or any such  Subsidiary the  outstanding  principal  amount of which exceeds
$1,000,000 that would permit (or that with notice or the lapse of time, or both,
would permit) one or more Per- sons to cause such Indebtedness to become due and
payable before its stated  maturity or before its regularly  scheduled  dates of
payment.

                  5.18. Title to Properties;  Liens. The Company,  ONS and their
respective  Subsidiaries  each  have good and  marketable  title to all of their
respective properties and assets, including such properties and assets which are
reflected in the  financial  statements  as at December 31, 1995  referred to in
Section 5.5 (except for such  properties and assets  disposed of since such date
in the ordinary  course of business and except as set forth in the  Registration
Statement),  free and clear of all Liens except as set forth in the Registration
Statement,  except for minor  imperfections of title and  encumbrances,  if any,
which do not materially  impair the use thereof in the operation of the business
of the  Company,  ONS or any of their  respective  Subsidiaries  and  except for
Permitted Liens.

                  5.19. Patents, Trademarks,  Authorizations,  etc. The Company,
ONS and their  respective  Subsidiaries  own,  possess  or have the right to use
(without any known conflict with the rights of others) all patents,  trademarks,
service marks, trade names,  copyrights,  licenses and authorizations  which are
necessary to the conduct of their respective businesses as conducted on the date
hereof  and which the  failure  to own,  possess  or have the right to use might
result in a Material Adverse Effect.

                  5.20.  Governmental Consents;  Exercise of Voting Rights, etc.
(a)  None  of the  nature  of the  Company,  ONS or of any of  their  respective
Subsidiaries,  nor any of their  respective  businesses or  properties,  nor any
relationship  between  the  Company,  ONS or any such  Subsidiary  and any other
Person,  nor any  circumstance  in  connection  with the offer,  issue,  sale or
delivery  of the  Debentures,  is such as to require  any  consent,  approval or
authorization  of, or any notice to, of filing,  registration  or  qualification
with, any court or  administrative  or governmental  body by or on behalf of the
Company,  ONS or any Subsidiary in connection with the execution and delivery of
this  Agreement or the offer,  issue,  sale or delivery of the  Debentures,  the
Interest Shares and the Conversion Shares or fulfillment of, or compliance with,
the terms and provisions of this Agreement or of the Debentures,  except for (1)
filings of reports  pursuant  to Section 13 or 15(d) of the  Exchange  Act,  (2)
filings under state securities or Blue Sky laws, (3) filings under the HSR Act.

         (b)  No  Applicable  Law  and  no  provision  of  the   certificate  of
incorporation, bylaws or other governing documents of the Company, ONS or any of
their  respective  Subsidiaries  is such as to require or would give rise to any
limitation  of any type on your right to vote (or consent  with  respect to) any
securities of ONS or the Company  owned by you as of the Execution  Date or that
will be owned by you as a result of (A) the Merger Transaction, (B) consummation
of the  transactions  contemplated by the Exchange  Agreement or (C) the Closing
under  this  Agreement  (including  any  Conversion  Shares or  Interest  Shares
received hereunder).

                                      -13-

<PAGE>


         5.21.  Offer of  Debentures.  Neither  ONS nor the  Company  has either
directly or  indirectly or through an agent  directly or indirectly  offered the
Debentures  or any part  thereof  or any  similar  securities  for  sale to,  or
solicited  any offer to buy any of the same from,  or  otherwise  approached  or
negotiated  in respect  thereof  with,  anyone other than you.  None of ONS, the
Company nor anyone authorized or employed to act on its behalf of either of them
has taken or will take any action  which would  subject the issuance and sale of
the  Debentures to the  provisions of Section 5 of the  Securities Act or to the
registration or qualification  requirements of any securities or Blue Sky law of
any applicable jurisdiction.

                  5.22. Federal Reserve Regulations. Neither the Company nor any
of its Subsidiaries will, directly or indirectly, use any of the proceeds of the
sale of the  Debentures  for the purpose of  purchasing  or carrying any "margin
security"  within the meaning of  Regulation  G of the Board of Governors of the
Federal  Reserve System (12, C.F.R.  207, as amended),  or any "security that is
publicly-held"  within the meaning of Regulation T of such Board (12 C.F.R. 220,
as  amended),  or  otherwise  take or permit to be taken any action  which would
involve a violation  of such  Regulation G or  Regulation T or  Regulation X (12
C.F.R.  224, as amended) or any other  regulation of such Board. No Indebtedness
being reduced or retired out of the proceeds of the sale of the  Debentures,  if
any,  was  incurred  for the  purpose of  purchasing  or  carrying  any  "margin
security"  within the  meaning of such  Regulation  G or any  "security  that is
publicly-held" within the meaning of such Regulation T. None of the Company, ONS
or any of their  Subsidiaries  owns or has any present  intention  of  acquiring
directly or  indirectly  any such margin  security or any such  security that is
publicly-held.

                  5.23. Investment Company Act. The Company is not, and upon the
issuance and sale of the Debentures as herein  contemplated  and the application
of the net proceeds therefrom will not be, an "investment  company" or an entity
"controlled"  by an  "investment  company"  as such  terms  are  defined  in the
Investment  Company Act of 1940, as amended (the "Investment  Company Act"), nor
is the Company an  "open-ended  investment  trust," "unit  investment  trust" or
"face-amount  certificate company" that is or is required to be registered under
Section 8 of the Investment Company Act.

                  5.24. Public Utility Holding Company Act. The Company is not a
"holding  company,"  or a  "subsidiary  company" of a "holding  company,"  or an
"affiliate"  of a "holding  company" or of a "subsidiary  company" of a "holding
company," as such terms are defined in the Public Utility Holding Company Act of
1935, as amended.

                  5.25.  Compliance  with ERISA.  (a) The Company,  ONS and each
ERISA Affiliate have operated and administered  each Plan in compliance with all
applicable laws except for such instances of  noncompliance as have not resulted
in and could not reasonably be expected have in a Material Adverse Effect.  None
of the Company,  ONS or any ERISA Affiliate has incurred any liability  pursuant
to Title I or IV of ERISA or the  penalty or excise tax  provisions  of the Code
relating to employee  benefit  plans (as defined in Section 3 of ERISA),  and no
event,  transaction or condition has occurred or exists that could reasonably be
expected to result in the incurrence of any such  liability by the Company,  ONS
or any ERISA  Affiliate,  or in the 

                                      -14-

<PAGE>

imposition  of any  Lien  on any of the  rights,  properties  or  assets  of the
Company, ONS or any ERISA Affiliate, in either case pursuant to Title I or IV of
ERISA or to such penalty or excise tax  provisions  or to Section  401(a)(29) or
412  of the  Code,  other  than  such  liabilities  or  Liens  as  would  not be
individually or in the aggregate Material.

                  (b) The present  value of the  aggregate  benefit  liabilities
under each of the Plans (other than Multiemployer  Plans),  determined as of the
end of such Plan's most  recently  ended plan year on the basis of the actuarial
assumptions  specified for funding purposes in such Plan's most recent actuarial
valuation  report,  did not exceed the aggregate  current value of the assets of
such Plan allocable to such benefit liabilities.  The term "benefit liabilities"
has the meaning specified in Section 4001 of ERISA and the terms "current value"
and "present value" have the meaning specified in Section 3 of ERISA.

                  (c) The  Company,  ONS  and  the  ERISA  Affiliates  have  not
incurred  withdrawal  liabilities (and are not subject to contingent  withdrawal
liabilities)  under  Section  4201 or 4204 of ERISA in respect of  Multiemployer
Plans that individually or in the aggregate are Material.

                  (d) The  execution  and  delivery  of this  Agreement  and the
issuance and sale of the Debentures  hereunder will not involve any  transaction
that is subject to the  prohibitions  of Section  406 of ERISA or in  connection
with which a tax could be imposed pursuant to Section  4975(c)(1)(A)-(D)  of the
Code.  The  representation  by the Company and ONS in the first sentence of this
Section  5.25(d) is made in reliance upon and subject to (i) the accuracy of the
representation  in Section 6.2 by each  Purchaser as to the sources of the funds
to be used to pay the purchase  price of the  Debentures to be purchased by such
Purchaser  and (ii) the  assumption,  made solely for the purpose of making such
representation, that Department of Labor Interpretive Bulletin 75-2 with respect
to  prohibited   transactions   remains  valid  in  the   circumstances  of  the
transactions contemplated herein.

                  5.26. Disclosure.  The Registration  Statement,  including the
financial  statements included therein and any document  incorporated therein by
reference,  complies or will comply as to form with all applicable provisions of
the  Securities  Act in all material  respects.  As of its effective  date,  the
Registration  Statement does not or will not contain any untrue  statements of a
material  fact or omit to state a material  fact  necessary in order to make the
statements  contained  therein  not  misleading.  This  Agreement  and the other
documents  certificates,  instruments  or  reports  delivered  to you under this
Agreement,  taken as a whole,  do not contain any untrue  statements of material
facts or omit to state material facts  necessary in order to make the statements
contained herein or therein,  in the light of the circumstances under which they
were made, not  misleading.  There is no fact known to either ONS or the Company
which has had a Material  Adverse  Effect  through the Execution  Date or in the
future (so far as the Company and ONS can now  reasonably  foresee and excluding
the effect of general  economic  and  industry  conditions)  may have a Material
Adverse  Effect  which has not been or will not be set forth or reflected in the
Registration Statement. The representations contained in this Section 5.26 shall
also  apply  to  any  amendments  to  the  Registration  Statement  and  to  the

                                      -15-

<PAGE>

registration  statement declared effective by the Commission with respect to the
Financing Transaction and to any amendments to any such registration statement.

                  5.27.  HSR Act Filings.  The Company hereby agrees to promptly
make such filings or other submissions under the HSR Act as may be required with
respect to the conversion of any Debenture,  the payment of any Interest  Shares
or  with  respect  to  the  redemption  or  repurchase  of any  Debenture  or in
connection  with any Mandatory  Sale of Underlying  Shares.  The Company  hereby
agrees to use its best efforts to respond to requests for additional information
relating to such filings or  submissions.  Exercise by the Company of its rights
under Section 11 of this  Agreement or otherwise  hereunder  shall be subject to
compliance with the HSR Act as applicable.

                  5.28.  Certificate  of  Incorporation  (a) The Company  hereby
agrees that,  notwithstanding its rights under its Certificate of Incorporation,
it shall not exercise  whatever  rights it may have under  Article  Tenth of its
Certificate  of  Incorporation  (as  presently  in effect and as the same may be
amended,  supplemented or otherwise changed, "Article Tenth"), to redeem (i) any
Debentures,  (ii) any Conversion  Shares,  (iii) any Interest  Shares,  (iv) any
share  of  Series  C  Preferred  Stock,  (v) any  securities  received  as stock
dividends  or  redemption  payments  on any  share of Series C  Preferred  Stock
pursuant to the Certificate of Designations, Rights and Preferences with respect
to the  Series C  Preferred  Stock  (the  "Series  C  Designation")  or (vi) any
securities received upon any conversion of any share of Series C Preferred Stock
(collectively,  the "Subject  Securities") held by you unless (x) you shall have
received a copy of an opinion addressed to the Company, reasonably acceptable to
you, of Verner,  Liipfert,  Bernard,  McPherson and Hand Chartered or other U.S.
regulatory  counsel  reasonably  acceptable  to you,  to the  effect  that  such
redemption is necessary to prevent a loss or secure reinstatement of a franchise
of the type  specified in Article  Tenth and (y) you have  received an Officers'
Certificate to the effect that such loss or failure to secure such reinstatement
would have a Material  Adverse Effect.  The Company agrees to exercise its right
of  redemption  only to the minimum  extent  necessary  to avoid such loss or to
secure such reinstatement. The Company presently has no knowledge of any grounds
for requiring any redemption under Article Tenth with respect to you.

                  (b) If the Company exercises its right of redemption  pursuant
to Article Tenth, in addition to paying you the redemption  amount under Article
Tenth,  it shall  pay you the  positive  difference,  if any of (i) the  highest
dollar value  (adding cash and the value of any  securities  received) you would
have  received  with respect to the Subject  Securities  had they been  redeemed
under  applicable  provisions of this Agreement or the Series C Designation,  as
the case may be, as at the date they were instead  redeemed  under Article Tenth
less  (ii)  the  dollar  value  (adding  cash and the  value  of any  securities
received)  actually  received by you as a result of any  redemption  pursuant to
Article  Tenth.  For purposes of this Section 5.28, the "value of any securities
received"  shall be equal to the "Closing  Price" of such securities as "Closing
Price" is defined in Article Tenth.  Notwithstanding  Article Tenth, the payment
to be received  by you with  respect to any Subject  Securities  redeemed  under
Article  Tenth  will be  either  (i) all in cash 

                                      -16-

<PAGE>

or (ii)  otherwise in the form provided with respect to  redemptions  under this
Agreement or the Series C Designation, as applicable, for the Subject Securities
redeemed.  Notwithstanding  anything  in this  Agreement  to the  contrary,  the
provisions  of this  Section 5.28 shall  survive  until the first date after the
Closing Date as of which you do not own any Subject Security.

         6.       Representations, Warranties and Agreements of Purchasers.
                  --------------------------------------------------------
                  6.1. Investment Representations. Each Purchaser represents and
warrants  (for itself and not the other  Purchaser)  that it is  purchasing  the
Debentures  for its own account for investment and not with a view to the resale
or distribution  of the Debentures or any part thereof or any Conversion  Shares
or  Interest  Shares,  and that  such  Purchaser  has no  present  intention  of
distributing any of the same;  provided,  however,  that the disposition of such
Purchaser's property shall at all times be within such Purchaser's control. Each
Purchaser  understands  that the Debentures have not been  registered  under the
Securities  Act, and that upon issuance the  Conversion  Shares and the Interest
Shares will not be registered under the Securities Act, and that the Debentures,
the Conversion  Shares and the Interest  Shares may be resold only if registered
pursuant  to the  provisions  of the  Securities  Act  or if an  exemption  from
registration is available.

                  6.2. ERISA. Each Purchaser  represents (for itself and not the
other Purchaser) that it is not acquiring the Debentures or any interest therein
with assets  allocated to any  separate  account  maintained  by it in which any
employee  benefit plan (or its related trust) has any interest.  As used in this
Section 6.2,  "separate  account"  and  "employee  benefit  plan" shall have the
respective meanings assigned thereto in Section 3 of ERISA.

                  6.3. HSR Act Filings.  You hereby agree to promptly  make such
filings or other  submissions  under the HSR Act as may be required with respect
to the conversion of any Debenture,  the receipt of any Interest  Shares or with
respect to the  redemption or repurchase of any Debenture or in connection  with
any  Mandatory  Sale of  Underlying  Shares.  You hereby  agree to use your best
efforts to respond to  requests  for  additional  information  relating  to such
filings or submissions.  Exercise by you of your rights under Section 11 of this
Agreement or otherwise hereunder shall be subject to compliance with the HSR Act
as applicable.

         7.       Accounting; Financial Statements; Other Information.
                  -----------------------------------------------------

         7.1.  Accounting;  Financial  Statements  and  Other  Information.  The
Company will maintain,  and will cause each of its  Subsidiaries to maintain,  a
system of accounting  established and  administered in accordance with GAAP. The
Company  will  deliver  (in  duplicate)  to you,  so long as you shall  hold any
Debentures:

                            (a) as soon as practicable, and, in any case, within
         ninety (90) days after the close of each fiscal year, two (2) copies of
         the  consolidated  balance  sheet of the Company  and its  Subsidiaries
         setting forth their consolidated  financial  condition as at the 

                                      -17-

<PAGE>

         end of such fiscal  year,  together  with  consolidated  statements  of
         income,  stockholders'  equity  and cash flows of the  Company  and its
         Subsidiaries  for such fiscal  year,  all in  reasonable  detail,  such
         consolidated  balance  sheet and  statements  of income,  stockholders'
         equity and cash flows to be  accompanied  by an  opinion  with  respect
         thereto  of  independent  public  accountants  of  recognized  national
         standing,  who may be the present regular  auditors of the books of the
         Company,  which opinion (i) shall state that such financial  statements
         present fairly the consolidated financial position and the consolidated
         results of operations and cash flows of the Company, in conformity with
         GAAP  applied on a  consistent  basis  during the  period  (except  for
         changes in application in which such accountants  concur), and that the
         examination  of such  accountants  in  connection  with such  financial
         statements has been made in accordance with generally accepted auditing
         standards  and,  accordingly,  included  such  tests of the  accounting
         records and such other auditing procedures as were considered necessary
         in the circumstances, or (ii) shall, using appropriate language that at
         the time shall have been adopted by the American Institute of Certified
         Public Accountants and generally employed by the accounting profession,
         certify in substance that such financial  statements present fairly the
         consolidated   financial  position  and  the  consolidated  results  of
         operations  and cash  flows of the  Company,  in  conformity  with GAAP
         applied on a consistent  basis during the period (except for changes in
         application in which such accountants concur), and that the examination
         of such  accountants in connection  with such financial  statements has
         been made in accordance  with generally  accepted  auditing  standards,
         and,  accordingly,  included such tests of the  accounting  records and
         such other  auditing  procedures  as were  considered  necessary in the
         circumstances;  provided  that,  the  delivery  within the time  period
         specified  above (or, if later,  within five (5) days of timely  filing
         with the  Commission)  of the  Company's  Annual  Report  on Form  10-K
         (together  with the Company's  annual report to  shareholders,  if any,
         prepared  pursuant to Rule 14a-3 under the Exchange Act) for any fiscal
         year prepared in compliance  with the  requirements  therefor and filed
         with the Commission shall be deemed to satisfy the requirements of this
         Section 7.1(a) for such fiscal year;

                            (b) as soon as practicable and, in any case,  within
         sixty (60) days after the end of the first,  second and third quarterly
         accounting  periods in each  fiscal  year,  an  unaudited  consolidated
         balance sheet of the Company and its Subsidiaries as at the end of such
         accounting  period,  and unaudited  consolidated  statements of income,
         stockholders' equity and cash flows of the Company and its Subsidiaries
         for such period and for the fiscal year to date,  setting forth in each
         case in comparative  form the figures for the  corresponding  periods a
         year earlier,  all in reasonable detail,  prepared and certified by the
         Treasurer  or the  Controller  or any Vice  President of the Company as
         presenting  fairly such financial  condition and results of operations,
         subject to changes resulting from year-end audit adjustments;  provided
         that,  delivery  within the time period  specified above (or, if later,
         within five (5) days of timely filing with the Commission) of copies of
         the  Company's   Quarterly  Report  on  Form  10-Q  for  any  quarterly
         accounting period prepared in compliance with the requirements  thereof
         and  filed  with  the  
                            
                                      -18-

<PAGE>
Commission  shall be deemed to satisfy the  requirements  of this Section 7.1(b)
for such quarterly accounting period;

                            (c)  promptly  after the  submission  thereof to the
         Company,   copies  of  all   communications   prepared  by  independent
         accountants   regarding   matters  of  material  weakness  of  internal
         accounting  controls submitted to the Company's senior management,  its
         Board of Directors or the audit committee of its Board of Directors, as
         contemplated  by American  Institute  of Certified  Public  Accountants
         Statement of Auditing Standards No. 60;

                            (d) promptly upon  distribution  thereof,  copies of
         all such financial or other statements,  including proxy statements and
         reports,  as the Company  shall send to the holders of its Common Stock
         or the holders of the Senior Notes;

                            (e)  promptly  after filing  thereof,  copies of all
         regular and  periodic  reports and  registration  statements  which the
         Company  may  file  with  the  Commission,   other  than   registration
         statements on Form S-8;

                            (f)  promptly  upon receipt  thereof,  copies of any
         notices received from any administrative official or agency relating to
         any order, ruling, statute or other law or information which might have
         or cause a Material Adverse Effect; and

                            (g) promptly upon request therefor, such information
         as to the business and  properties  of the Company as you may from time
         to time reasonably request.

Notwithstanding  any other  provision  of this  Section 7.1, the Company will be
required  to  deliver  to BAe and Matra  only,  and not to any  other  holder of
Debentures,  the materials  specified in paragraphs  (a), (b), (c), (f) and (g).
The Company will deliver (in duplicate) to each holder of Debentures (other than
BAe and Matra) the materials specified in paragraphs (d) and (e).

                  7.2.  Company  Certificate.  Each set of financial  statements
delivered  pursuant to Section 7.1(a) or Section 7.1(b) will be accompanied by a
certificate, signed by one of the Responsible Officers, stating that a review of
the affairs and activities of the Company during the applicable  period has been
made by  authorized  employees  of the Company and that,  to the  knowledge  and
belief of such  officer,  there did not exist at any time during such period any
condition  or event  which  constitutes  an Event of  Default  under  any of the
provisions of this Agreement or the Debentures;  provided,  however,  that if to
the  knowledge  of such officer any such Event of Default  shall have  occurred,
such certificate  shall so specify and shall state whether such Event of Default
has been cured or is  continuing  and,  if  continuing,  what steps the  Company
proposes  to take to cure such Event of Default and the time  necessary  to cure
such Event of Default.

                  7.3.  Accountant's  Certificate.  Each set of annual financial
statements  delivered pursuant to Section 7.1(a) will be accompanied by a report
of the  independent  public  

                                      -19-

<PAGE>

accountants who have certified or reported on such financial statements, stating
that in making  their  examination  necessary  to  express  an  opinion  on such
financial  statements,  such  accountants  have  obtained  no  knowledge  of any
condition or event which constitutes an Event of Default or a Potential Event of
Default or, if such  accountants have any such knowledge that any such condition
or event then exists,  specifying  the nature and period of  existence  thereof.
Each  suchreport  may in addition state that such  examination  was not directed
primarily toward obtaining  knowledge of any such condition or event referred to
in the preceding sentence.

         8.       Inspection.
                  ----------
                            (a)  Pre-Closing  Access.  From the  Execution  Date
         through the  Closing  Date,  the  Company and ONS shall each:  (i) upon
         reasonable  prior  notice,  permit each  Purchaser  and its  authorized
         representatives,  counsel,  accountants  and agents to have  reasonable
         access to its  properties,  records and documents,  and (ii) furnish to
         each Purchaser and its authorized representatives, counsel, accountants
         and agents such financial  records and other  documents with respect to
         the Company,  ONS or any  Subsidiary as such  Purchaser may  reasonably
         request;  provided,  however,  that in no event  shall the  Company  be
         obligated to comply with any of the foregoing if such  compliance  will
         give any Person access to any information which the Company, ONS or any
         Subsidiary  is required by contract or otherwise to keep  confidential;
         and  provided,   further,   that  with  respect  to  such  confidential
         information,  the  Company  or  ONS  shall,  at  its  expense,  upon  a
         Purchaser's  specific request, use its best efforts to seek the consent
         of such  Persons as may be  necessary  to permit the  requesting  party
         access to such information  without  violating the confidential  nature
         thereof.

                            (b)   Post-Closing   Access.   While  you  hold  any
         Debentures,  your  representative  or  representatives  may  visit  and
         inspect any of the properties of the Company or any of its Subsidiaries
         as follows:

                                    (i) No  Default.  If no  Potential  Event of
                  Default or Event of Default  exists,  then at your expense and
                  upon reasonable prior notice to the Company, you may visit the
                  principal  executive  offices of the  Company  to discuss  the
                  affairs,   finances  and  accounts  of  the  Company  and  its
                  Subsidiaries  with  the  Company's  officers,  and,  with  the
                  consent of the Company (which consent will not be unreasonably
                  withheld),  visit  the other  offices  and  properties  of the
                  Company and each Subsidiary,  all at such reasonable times and
                  as often as may be reasonably requested in writing; and

                                    (ii)  Default.   If  a  Potential  Event  of
                  Default or Event of Default exists, then at the expense of the
                  Company  you may  visit  and  inspect  any of the  offices  or
                  properties  of the  Company or any  Subsidiary  to examine all
                  their respective books of account,  records, reports and other
                  papers, to make copies and extracts therefrom,  and to discuss
                  their  respective  affairs,  finances and accounts  with their
                  respective officers and independent public accountants (and 

                                      -20-

<PAGE>

         by this provision the Company  authorizes  said  accountants to discuss
         the   affairs,   finances   and   accounts   of  the  Company  and  its
         Subsidiaries),  all at such  reasonable  times  and as  often as may be
         requested.



The rights set forth in this  Section 8(b) are granted to BAe and Matra only and
not to any other holders of Debentures.

         9. Confidential  Treatment.  You agree that any information  concerning
the Company, ONS or any of their respective  Subsidiaries  obtained by you under
the  provisions  of Section 7 or 8 or which was  furnished to you in  connection
with the negotiation of the  transactions  contemplated  hereby and which in any
case is not contained in a report or other  document  filed with the  Commission
(and which is not  afforded  confidential  treatment by the  Commission  or such
other  agency),  distributed  by ONS  and,  after  consummation  of  the  Merger
Transaction, by the Company to its public stockholders or otherwise available to
the public generally and which is or was designated by the Company in writing as
confidential,  will, to the extent permitted by law or legal process, be treated
confidentially by you and will not be distributed or otherwise made available by
you to any  Person,  other  than your  employees  or your  authorized  agents or
representatives; provided, however, that you may provide any such information to
any  governmental  agency or other  Person to which you are  required  by law or
legal process to provide such information.

         10. ERISA.  The Company will deliver (in  duplicate) to you, so long as
you shall  hold any  Debenture,  and to each  other  holder  of the  outstanding
Debentures,  promptly, and in any event within five (5) days after a Responsible
Officer  becoming aware of any of the following,  a written notice setting forth
the  nature  thereof  and the  action,  if any,  that  the  Company  or an ERISA
Affiliate proposes to take with respect thereto:

                                    (i) with respect to any Plan, any reportable
                  event,  as  defined  in  Section  4043(b)  of  ERISA  and  the
                  regulations thereunder,  for which notice thereof has not been
                  waived  pursuant to such  regulations as in effect on the date
                  hereof; or

                                    (ii)  the  taking  by the  PBGC of  steps to
                  institute,  or the  threatening by the PBGC of the institution
                  of,   proceedings   under   Section  4042  of  ERISA  for  the
                  termination of, or the appointment of a trustee to administer,
                  any Plan, or the receipt by the Company or any ERISA Affiliate
                  of a notice  from a  Multiemployer  Plan that such  action has
                  been  taken by the PBGC  with  respect  to such  Multiemployer
                  Plan; or

                                    (iii) any event,  transaction  or  condition
                  that could result in the  incurrence  of any  liability by the
                  Company or any ERISA  Affiliate  pursuant  to Title I or IV of
                  ERISA or the  penalty  or excise  tax  provisions  of the Code
                  relating to employee  benefit  plans,  or in the imposition of
                  any Lien on any of the  rights,  properties  or  assets of the
                  Company or any ERISA  Affiliate  pursuant  to 


                                      -21-

<PAGE>

                  Title  I or  IV  of  ERISA  or  such  penalty  or  excise  tax
                  provisions, if such liability or Lien, taken together with any
                  other  such   liabilities  or  Liens  then   existing,   would
                  reasonably be expected to have a Material Adverse Effect.

         11.      Redemption of Debentures; Repurchase Rights; Mandatory Sales.

                  11.1. Right of Redemption. Any redemption or repurchase of the
Debentures at the election of the Company or otherwise, as permitted or required
by any  provision  of the  Debentures  or  this  Agreement,  shall  be  made  in
accordance with such provision and this Section 11.

                  11.2.  Company Right of  Redemption.  Subject to Section 11.5,
the  Company  may,  at any time  other than  during a Change of Control  Period,
redeem all or part of the  Debentures,  subject to satisfaction of the following
conditions:

                            (a) The Company shall give a notice of redemption to
         each holder in the manner  provided in Section 23 not less than fifteen
         (15) nor, subject to Section  11.5(a),  more than sixty (60) days prior
         to the  applicable  Redemption  Date.  Such notice  shall  disclose the
         proposed source of funds for the redemption  (e.g.  private  placement,
         working capital, public offering).

                            (b) The amount to be  redeemed  must be (i) at least
         $5,000,000,  in  principal  amount  of  Debentures  and  (ii) at  least
         twenty-five  percent (25%) of the then Outstanding  Debentures  (unless
         the  principal  amount  of then  Outstanding  Debentures  is less  than
         $5,000,000,  in which  case the  amount  to be  redeemed  shall be such
         principal  amount).  In the  event  that  less  than  all  of the  then
         Outstanding  Debentures  are to be redeemed,  the Company  shall redeem
         Debentures  pro rata from  each  holder of  Debentures  based  upon the
         respective principal amounts of the Debentures  outstanding on the date
         of redemption.

                            (c) The Company shall pay the applicable  Redemption
         Price to each holder of Debentures on the Redemption  Date, in cash, in
         immediately available funds. With respect to each holder of Debentures,
         the Redemption  Price shall be determined by multiplying (A) the sum of
         (i) the number of  Conversion  Shares such holder would  receive on the
         Redemption  Date with respect to the  Debentures to be redeemed if such
         Debentures  were to be converted in accordance  with the  provisions of
         Section 15 hereof and (ii) the number of Interest  Shares  representing
         the accrued but unpaid interest on the Debentures to be redeemed, as of
         the Redemption Date, by (B) the greater of (x) the average of the daily
         Closing  Prices per share of Common  Stock for the twenty (20)  Trading
         Days immediately preceding the Redemption Date or (y) $17.50.

                  11.3.  Redemption and Repurchase Rights upon Change of Control
Event.

                            (a) During any Change of Control  Period  either the
         Company  (subject to Section 11.5) or any holder of Debentures may give
         notice to the other  pursuant to 

                                      -22-

<PAGE>
         which the Company  shall be required to purchase all (but not less than
         all) of the  Debentures  (if the notice is given by the Company) or all
         of the  Debentures  held by a holder (if the notice is given by such ho
         lder) in  accordance  with the  provisions  of this Section  11.3.  The
         Company shall give notice in accordance  with Section 23 to each holder
         of Debentures,  within five (5) Business Days of the  commencement of a
         Change of Control Period.

                            (b)  Notice of a  redemption  by the  Company or the
         exercise of a repurchase right by any holder of Debentures  pursuant to
         this Section  11.3 may be given (in the manner  provided in Section 23)
         at any time during the Change of Control  Period.  The repurchase  date
         (the  "Repurchase  Date") for any  redemption or repurchase  under this
         Section  11.3 shall be a Business  Day  specified in the notice that is
         not less than fifteen (15) nor, subject to Section  11.5(a),  more than
         sixty (60) days from the date notice is given.  Any notice given by the
         Company under this Section 11.3 shall  disclose the proposed  source of
         funds for the Company's  redemption (e.g.  private  placement,  working
         capital, public offering).

                            (c) The Company shall pay the applicable  Repurchase
         Price to each  holder  of  Debentures  from whom  Debentures  are to be
         redeemed or repurchased on the Repurchase Date, in cash, in immediately
         available  funds.  With respect to each holder of Debentures  from whom
         Debentures are to be redeemed or  repurchased  pursuant to this Section
         11.3, the repurchase price (the "Repurchase Price") shall be determined
         by multiplying (A) the sum of (i) the number of Conversion  Shares such
         holder  would  receive  on the  Repurchase  Date  with  respect  to the
         Debentures to be repurchased if such Debentures were to be converted in
         accordance with the provisions of Section 15 hereof and (ii) the number
         of Interest Shares  representing the accrued but unpaid interest on the
         Debentures  to be  repurchased  as of the  Repurchase  Date  by (B) the
         greatest of: (x) the average of the daily  Closing  Prices per share of
         Common Stock for the twenty (20) Trading Days immediately preceding the
         Repurchase  Date,  (y) $17.50,  or (z) the price per share paid for the
         Common Stock (whether in assets,  cash,  securities or any  combination
         thereof) in the Change of Control  transaction to public holders of the
         Common Stock generally.

                  11.4. Mandatory Sale. Subject to Section 11.5, the Company may
require each holder of Debentures to sell (a "Mandatory Sale") all or subject to
paragraph (b) below,  a part of the Conversion  Shares and Interest  Shares such
holder  would  be  entitled  to  receive  if such  holder  converted,  as of the
Mandatory Sale Date, all of the Debentures owned by such holder on the date such
holder  receives the notice  specified in paragraph  (a) below (the  "Underlying
Shares") provided all of the following terms and conditions are met:

                            (a) The Company shall give a notice of the Mandatory
         Sale in the manner  provided in Section 23 not less than  fifteen  (15)
         nor, subject to Section 11.5(a), more than sixty (60) days prior to the
         date specified in such notice (the "Mandatory Sale 

                                      -23-

<PAGE>
         Date"). Such notice shall disclose the proposed source of funds for the
         Mandatory Sale (e.g. private placement, public offering).

                            (b) The  Company  may  only  exercise  its  right to
         require  a  Mandatory  Sale on one  occasion.  If less  than all of the
         Underlying  Shares  are  to be  subject  to  the  Mandatory  Sale,  the
         aggregate sale price (the  "Mandatory Sale Price") with respect to such
         Underlying Shares must be at least  $10,000,000.  In the event that the
         Mandatory Sale shall apply to less than all of the  Underlying  Shares,
         the Underlying  Shares subject to the Mandatory Sale shall be allocated
         pro rata among the holders of the Debentures  based upon the respective
         principal amounts of the Debentures of such holders  outstanding on the
         date of the Mandatory Sale.

                            (c) The  Mandatory  Sale may be  accomplished  by an
         underwritten  public offering of the Underlying  Shares or by a private
         placement  of the  Underlying  Shares,  in either  case  arranged  by a
         nationally  recognized investment banking firm reasonably acceptable to
         the  holders  of a majority  of the  Underlying  Shares  subject to the
         Mandatory Sale.

                            (d) The Company will  indemnify and hold each holder
         of Debentures harmless with respect to any liability arising out of any
         misstatement  or  omission  in the  registration  statement  or private
         placement  memorandum and other  documents  prepared by or on behalf of
         the Company in connection  with the Mandatory Sale  transaction  (other
         than  information  provided  by such  holder  expressly  for  inclusion
         therein)  and  will  pay all of the  expenses  of the  Mandatory  Sale,
         including,   any  registration  fees,  any  underwriting   discount  or
         placement  agent fees,  and the  reasonable  fees of one legal  counsel
         selected by the holders of a majority of the Underlying  Shares subject
         to  the  Mandatory   Sale  in  connection   with  the  review  of  such
         registration statement or private placement memorandum.

                            (e)  The  underwriters  or  the  private   placement
         purchasers  shall pay each holder of Debentures in connection  with the
         Mandatory  Sale,  the Mandatory  Sale Price,  in cash,  in  immediately
         available funds. The Mandatory Sale Price for each holder of Debentures
         shall be determined by multiplying  the number of Underlying  Shares of
         such  holder  subject to the  Mandatory  Sale by the  greater of (x) an
         amount that is at least ninety-five percent (95%) of the average of the
         daily  Closing  Prices per share of Common  Stock for the  twenty  (20)
         Trading Days  immediately  preceding the Mandatory Sale Date (plus such
         percentage  in excess of  ninety-five  percent (95%) of such average if
         paid by the purchasers of the Underlying  Shares) or (y) $17.50. In the
         event that the underwriters or private placement  purchasers do not for
         any reason pay each holder of Debentures  the full Mandatory Sale Price
         to which such holder is  entitled,  the  Company  shall pay such holder
         within one (1)  Business  Day of the  Mandatory  Sale Date the positive
         difference  (up to the full amount of the Mandatory Sale Price) between
         the  Mandatory  Sales Price to which such holder was  entitled  and the
         aggregate amount such holder actually received from the underwriters or
         the private placement purchasers in connection with the Mandatory Sale.


                                      -24-

<PAGE>
                  11.5. Restriction on Conversion Rights; Withdrawal of Notice.
                        ------------------------------------------------------ 
                  (a)  Following  receipt  from the  Company  of any  notice  of
redemption  pursuant to Section  11.2 or Section 11.3 or any notice of Mandatory
Sale  pursuant  to Section  11.4  (each,  a "Company  Notice"),  each  holder of
Debentures shall have ten (10) Business Days after receipt of the Company Notice
(the  "Decision  Period") in which to notify the Company in accordance  with the
provisions  of Section 23 that such  holder  wishes to convert  all or a part of
such holder's  Debentures  (the  "Converted  Debenture  Portion") into shares of
Common Stock in accordance  with the  provisions of Section 15.2. If such notice
is given in a timely  manner by such holder (a "Holder  Notice"),  the  proposed
redemption of Debentures by the Company or proposed Mandatory Sale of Underlying
Shares arranged by the Company  pursuant to Section 11.2, 11.3 or 11.4 shall not
impair the right of such holder to convert the Converted  Debenture Portion into
shares of Common  Stock  pursuant  to Section  15.2.  Except as  provided in the
preceding  sentence,  no amount of  Debentures  of any holder  specified  in the
Company Notice as subject to redemption pursuant to Section 11.2 or Section 11.3
or  Mandatory  Sale  pursuant to Section  11.4 may be  converted  into shares of
Common Stock  pursuant to Section 15.2 during the period  commencing on the date
of the  Company  Notice  and  ending  on the  earliest  of (x)  the  date of any
withdrawal of the Company  Notice  pursuant to Section  11.5(b),  (y) subject to
Section  11.5(c),  the  sixty-first  (61st) day following the earlier of (i) the
expiration of the Decision  Period or (ii) the date of the Company's  receipt of
the Holder Notice of such holder (the "Company Notice  Expiration  Date") or (2)
the applicable Redemption, Repurchase or Mandatory Sale Date. Each holder giving
a Holder Notice shall convert the Converted  Debenture  Portion specified in the
Holder Notice within fifteen (15) Business Days after the applicable Redemption,
Repurchase, or Mandatory Sale Date.  Notwithstanding any other provision of this
Agreement,  the Company shall have given notice of redemption in compliance with
Section 11.2(a) and Section 11.3(b) and notice of a Mandatory Sale in compliance
with  Section  11.4(a)  if the  Redemption  Date,  the  Repurchase  Date  or the
Mandatory  Sale  Date,  as the  case  may be,  occurs  not  later  than  the day
immediately preceding the Company Notice Expiration Date.

                  (b) The Company  shall have the right to withdraw  any Company
Notice  by  notifying  the  holders  of the  Debentures  of such  withdrawal  in
accordance  with  the  provisions  of  Section  23,  but only if the  notice  of
withdrawal is accompanied by a copy of a written notice, to the effect set forth
in the following  sentence  from the  underwriter,  placement  agent or proposed
private placement  purchaser from whom the Company intended to raise the capital
necessary to complete the proposed  redemption or with whom the Company intended
to place the Underlying  Shares in a proposed  Mandatory Sale. Such notice shall
state that the amount of Company  securities  included in the proposed  offering
(which, in the case of a Mandatory Sale, shall be the Underlying Shares included
in such  offering)  would not be able to be sold at a price  sufficient to yield
proceeds at least equal to the  redemption  price  specified  in Section 11.2 or
Section 11.3, as applicable,  or the Mandatory Sale Price. If any Company Notice
is properly withdrawn  pursuant to this Section 11.5(b),  failure by the Company
to make any  redemption  payment  pursuant to Section 11.2 or Section 11.3 or to
arrange for or make any payment in connection  with a Mandatory Sale pursuant to
Section  11.4, 


                                      -25-

<PAGE>

in any  case as  proposed  in such  withdrawn  Company  Notice,  (i)  shall  not
constitute  an Event  of  Default  under  this  Agreement  and  (ii)  shall  not
constitute  the  one-time  exercise by the Company of its rights  under  Section
11.4(b).

                  (c)  Notwithstanding  any other  provision of this  Agreement,
following  receipt of a Company Notice, if the HSR Act would require any filings
to be made with respect to the conversion of any Debenture  subject to a Company
Notice,  each holder of Debentures subject to the filing requirements of the HSR
Act upon any  conversion of a Debenture  subject to a Company  Notice shall have
ten  (10)  Business  Days  after  the  expiration  or early  termination  of any
applicable  HSR Act  waiting  period to exercise  the  conversion  privilege  in
accordance with Section 15.2 with respect to such Debentures before any proposed
redemption  of such  Debentures  by the  Company or proposed  Mandatory  Sale of
Underlying Shares arranged by the Company pursuant to Section 11.2, 11.3 or 11.4
shall  impair  the right of such  holder to  convert  such  Debentures,  and the
Company's  right to redeem the  Debentures  of any such holder or to require the
Mandatory  Sale of any  Underlying  Shares of any such holder shall be suspended
until ten (10) Business Days after the  expiration or early  termination  of the
applicable HSR Act waiting period (an "HSR Suspension  Period").  If any HSR Act
filing shall be required hereunder,  the Company Notice Expiration Date shall be
the sixty-first  (61st) day after the latest HSR Suspension Period applicable to
any Holder.

         12. Business  Covenants.  From the Closing Date, and thereafter so long
as any of the  Debentures  are  outstanding,  the Company will perform or comply
with, as required, each of the following covenants:

                  12.1.  Payment of Debentures and  Maintenance  of Office.  The
Company will punctually pay or cause to be paid the principal,  premium, if any,
and interest to become due in respect of the  Debentures  according to the terms
thereof and hereof and will maintain an office within the continental boundaries
of the United  States of America  where  notices,  presentations  and demands in
respect of this Agreement and the Debentures may be made upon it and will notify
each holder of a Debenture of any change of location of such office. Such office
shall first be  maintained  at 2440 Research  Boulevard,  Suite 400,  Rockville,
Maryland 20850.

                  12.2.  Payment of Taxes and Claims. The Company will, and will
cause each of its  Subsidiaries  to, pay and  discharge  promptly (a) all taxes,
assessments  and  other  governmental  charges  imposed  upon  it or  any of its
properties or assets or in respect of any of its franchises, business, income or
profits  before the same shall become  delinquent  and (b) all lawful  claims of
materialmen,  mechanics,  carriers,  warehousemen,  landlords  and other similar
Persons for labor,  materials,  supplies and rentals which, if unpaid,  might by
law become a lien or charge  upon its  property,  except to the extent  that the
failure  so to pay any amount  pursuant  to (a) or (b) would not have a Material
Adverse Effect; provided, however, that none of the foregoing need be paid while
being contested in good faith by appropriate  proceedings  initiated  within the
period allowed by applicable law, rule or regulation and diligently conducted so
long as (i) adequate book reserves have been established in accordance with GAAP
with respect  


                                      -26-

<PAGE>

thereto and (ii) neither the  Company's  nor any such  Subsidiary's  title to or
right to the use of its properties is materially adversely affected thereby.

         12.3.  Maintenance of Properties and Corporate  Existence.  The Company
and its Subsidiaries will each:

                            (a) maintain its property in good condition and make
         all needful and proper renewals,  replacements,  additions, betterments
         and improvements  thereto, all as in the judgment of the Company may be
         necessary so that the business  carried on in connection  therewith may
         be conducted  properly and  advantageously at all times;  provided that
         nothing  in  this  Section  12.3  shall  prevent  the  Company  or  any
         Subsidiary from  discontinuing the use, operation or maintenance of any
         properties  or  disposing  of any of  them if  such  discontinuance  or
         disposal is, in the  judgment of the Company,  desirable in the conduct
         of the business of the Company or such Subsidiary;

                            (b)  subject to Section  13.12 (if and to the extent
         in effect), keep adequately insured, by financially sound and reputable
         insurers,  all  of its  property  of a  character  usually  insured  by
         entities engaged in the same or a similar business  similarly  situated
         against loss or damage of the kinds and in amounts  customarily insured
         against  by such  entities  and with  deductibles  or  co-insurance  no
         greater than is customary,  and carry,  with such insurers in customary
         amounts  and  with  deductibles  or  co-insurance  no  greater  than is
         customary,  such other insurance,  including public liability insurance
         and liability  insurance against claims for any violation of applicable
         law, as is usually carried by entities engaged in the same or a similar
         business  similarly   situated,   provided  that  compliance  with  the
         insurance  covenants  in the  Senior  Indentures  will be  satisfactory
         compliance with this paragraph;

                            (c) keep proper books of record and account in which
         full,  true  and  correct  entries  will be  made  of all its  business
         transactions in accordance with GAAP;

                            (d) set aside on its  books  from its  earnings  for
         each fiscal year,  beginning with the first such year ending subsequent
         to the date  hereof and for each  fiscal  year  thereafter,  in amounts
         deemed adequate in the opinion of the Company,  all proper accruals and
         reserves which, in accordance with GAAP,  should be set aside from such
         earnings  in   connection   with  its  business,   including,   without
         limitation, reserves for depreciation, obsolescence and/or amortization
         and accruals for taxes for such period, including all taxes based on or
         measured by income or profits; and

                            (e) except as otherwise  permitted  or  contemplated
         hereby,  do or cause to be done all things  necessary  to preserve  and
         keep in full force and effect its corporate  existence and such rights,
         patents,  trademarks,  copyrights,  licenses,  permits,  franchises and
         governmental  authorizations as the Company  determines to be necessary
         for the present and presently planned future conduct of its business.


                                      -27-

<PAGE>

                  12.4.  Compliance with Law. Neither the Company nor any of its
Subsidiaries will:

                            (a) violate any laws, ordinances, governmental rules
         or  regulations  to which it is, or might become,  subject,  unless the
         same are being  contested  by the  Company or such  Subsidiary  in good
         faith and by appropriate  proceedings which shall  effectively  prevent
         the  imposition  of any penalty on the Company or such  Subsidiary  for
         such noncompliance, or

                            (b)  fail to use its  best  efforts  to  obtain  any
         patents,  trademarks,  service marks, trade names,  copyrights,  design
         patents,   licenses,   permits,   franchises   or  other   governmental
         authorizations  necessary  to the  ownership  of its property or to the
         conduct of its business, which violation or failure would or might have
         a Material Adverse Effect.

                  12.5.     [Reserved.]

                  12.6.  When  Company May Merge,  Etc.  The  Company  shall not
consolidate  with or merge into,  or transfer  all or  substantially  all of its
assets to, another Person unless: (i) such Person is a corporation,  partnership
or limited liability company organized under the laws of the United States,  one
of the States thereof or the District of Columbia; (ii) the resulting, surviving
or transferee  corporation,  partnership or limited liability company assumes by
written  agreement all the  obligations  of the Company under the Debentures and
this Agreement;  (iii)  immediately  after giving effect to such  transaction no
Event of  Default or  Potential  Event of Default  shall  have  occurred  and be
continuing;  and (iv) the  Company  shall  have  delivered  to you an  Officers'
Certificate  and an opinion of counsel of the Company  acceptable  to you,  each
stating  that such  consolidation,  merger  or  transfer  and such  supplemental
agreement  comply with this  Agreement,  and thereafter  all  obligations of the
predecessor shall terminate.

         Upon  any   consolidation   or  merger  or  any   transfer  of  all  or
substantially  all of the assets of the Company in accordance  with this Section
12.6, the successor corporation, partnership or limited liability company formed
by such  consolidation  or into  which the  Company  is merged or to which  such
transfer is made shall  succeed to, and be  substituted  for,  and may  exercise
every right and power of, the Company under this Agreement, with the same effect
as if such  successor  had been named as the  Company  herein,  all  without any
further act or deed on the part of such successor being required.

         Section  12.6 shall  cease to apply  after the Senior  Notes  Reduction
Date.

                  12.7.  Listing.   The  Company  will  list  on  each  national
securities  exchange on which any Common  Stock may at any time be listed and on
the Nasdaq  National  Market,  if the Common Stock is  authorized  for quotation
thereon,  subject to official  notice of  issuance  upon 


                                      -28-

<PAGE>

the conversion of the Debentures or upon payment of interest,  and will maintain
such listing of, (i) all Conversion Shares and (ii) all Interest Shares.

                  12.8. Issuances of Guarantees by New Restricted  Subsidiaries.
On the date that any Person  becomes a Restricted  Subsidiary,  the Company will
cause such additional Restricted Subsidiary to execute a supplemental Subsidiary
Guarantee,  providing for a full and unconditional  guarantee by such additional
Restricted Subsidiary of the Company's obligations under the Debentures and this
Agreement to the same extent as that set forth in the Subsidiary Guarantee.

                  12.9. Subsidiaries. The Company will provide to you a complete
and  accurate  list of its  Subsidiaries  each time  Exhibit D  attached  hereto
becomes  inaccurate and cause each Subsidiary  which guarantees any Indebtedness
to promptly execute and deliver a Subsidiary Guarantee to you.

                  12.10.  Notice. The Company will give prompt written notice to
you of any Event of Default or Potential Event of Default hereunder.

                  12.11.  Waiver of Stay,  Extension or Usury Laws.  The Company
covenants  (to the extent  that it may  lawfully  do so) that it will not at any
time  insist  upon,  or plead,  or in any  manner  whatsoever  claim or take the
benefit or advantage of, any stay or extension law or any usury law or other law
that would prohibit or forgive the Company from paying all or any portion of the
principal of,  premium,  if any, or interest on the  Debentures as  contemplated
herein,  whenever  enacted,  now or at any time hereafter in force,  or that may
affect the covenants or the performance of this Purchase Agreement;  and (to the
extent  that it may  lawfully  do so) the Company  hereby  expressly  waives all
benefit or  advantage  of any such law and  covenants  that it will not  hinder,
delay or impede the execution of any power herein  granted to the holders of the
Debentures,  but will  suffer and permit  the  execution  of every such power as
though no such law had been enacted.

         13.  Financial  Covenants.  From the Senior Notes  Reduction  Date, and
thereafter so long as any of the  Debentures are  outstanding,  the Company will
perform or comply with, as required, each of the following covenants:

                  13.1.     Merger and Sale of Assets.
                            -------------------------
                            (a) The Company will not  consolidate  with or merge
         into any  other  Person  or  permit  any  other  Person  (other  than a
         Subsidiary as provided by paragraph (b) below) to  consolidate  with or
         merge into it, or sell, lease,  transfer or otherwise dispose of all or
         substantially  all of its assets (as an  entirety or  substantially  an
         entirety  in one  transaction  or a series  of  related  transactions),
         unless:

                                    (i) the entity which survives such merger or
                  results from such  consolidation  or the  corporation to which
                  such sale,  lease,  transfer or other 


                                      -29-

<PAGE>

                  disposition  is  made  (the  "surviving   corporation")  is  a
                  corporation  organized  under the laws of the United States of
                  America or a jurisdiction thereof;

                                    (ii)  the due and  punctual  payment  of the
                  principal of and  premium,  if any, and interest on all of the
                  Debentures,  according  to their tenor,  and of the  covenants
                  therein,  and the due and punctual  performance and observance
                  of all the  covenants  in this  Agreement  to be  performed or
                  observed by the Company,  are expressly  assumed in writing by
                  the surviving corporation;

                                    (iii)  before  and  immediately   after  the
                  consummation  of the  transaction,  and  after  giving  effect
                  thereto,  no Event of  Default or  Potential  Event of Default
                  exists or would exist;

                                    (iv) immediately after giving effect to such
                  transaction  on a pro forma  basis,  the Company or any Person
                  becoming the successor  obligor of the Debentures shall have a
                  Consolidated   Net  Worth   equal  to  or  greater   than  the
                  Consolidated  Net Worth of the  Company  immediately  prior to
                  such transaction;

                                    (v)  immediately  after  consummation of the
                  transaction,  and after giving effect  thereto,  the surviving
                  corporation  would be  permitted  to  incur at least  $1.00 of
                  additional  Indebtedness  under the first paragraph of Section
                  13.5;  provided  that  this  clause  (v)  shall not apply to a
                  consolidation or merger with or into a Wholly Owned Restricted
                  Subsidiary  with a  positive  net  worth;  provided  that,  in
                  connection   with  any  such  merger  or   consolidation,   no
                  consideration (other than Common Stock in the surviving Person
                  or  the  Company)  shall  be  issued  or  distributed  to  the
                  stockholders of the Company;

                                    (vi) the  provisions  of  Sections  15.8 and
                  15.13  shall  have  been  in all  respects  complied  with  in
                  connection with such transaction; and

                                    (vii) the Company delivers to each holder of
                  Debentures an Officers' Certificate  (attaching the arithmetic
                  computations  to demonstrate  compliance with clauses (iv) and
                  (v)), in each case stating that such consolidation,  merger or
                  transfer  complies with this provision and that all conditions
                  precedent  provided  for herein  relating to such  transaction
                  have been complied with; provided,  however, that clauses (iv)
                  and (v) above do not apply if, in the good faith determination
                  of the Board of Directors of the Company,  whose determination
                  shall  be  evidenced  by a  Board  Resolution,  the  principal
                  purpose  of  such  transaction  is  to  change  the  state  of
                  incorporation  of the Company;  and provided  further that any
                  such  transaction  shall not have as one of its  purposes  the
                  evasion of the foregoing limitations.

                            (b) No  Subsidiary  of the Company will  consolidate
         with or merge  into any  other  Person or  permit  any other  Person to
         consolidate  with or  merge  into  it,  except  

                                      -30-

<PAGE>

         that a Subsidiary may consolidate with or merge into (i) the Company if
         each of the  provisions  of paragraph (a) are satisfied or (ii) another
         Subsidiary.


                  13.2. Transactions with Affiliates.  The Company will not, and
will not permit any  Restricted  Subsidiary to,  directly or  indirectly,  enter
into,  renew or extend  any  transaction  (including,  without  limitation,  the
purchase, sale, lease or exchange of property or assets, or the rendering of any
service)  with any holder (or any Affiliate of such holder) of five percent (5%)
or more of any class of Capital  Stock of the Company or with any  Affiliate  of
the Company or any Restricted Subsidiary,  except upon fair and reasonable terms
no less  favorable to the Company or such  Restricted  Subsidiary  than could be
obtained, at the time of such transaction or, if such transaction is pursuant to
a written  agreement,  at the time of the execution of the  agreement  providing
therefor,  in a comparable  arm's-length  transaction  with a Person that is not
such a holder or an Affiliate.

         The  foregoing  limitation  does not  limit  and shall not apply to (i)
transactions  (A)  approved  by a majority of the  disinterested  members of the
Board of  Directors  or (B) for which the  Company  or a  Restricted  Subsidiary
delivers to you a written opinion of a nationally  recognized investment banking
firm  stating  that the  transaction  is fair to the Company or such  Restricted
Subsidiary from a financial  point of view, (ii) any transaction  solely between
the  Company  and any of its  Wholly  Owned  Restricted  Subsidiaries  or solely
between Wholly Owned  Restricted  Subsidiaries,  (iii) the payment of reasonable
and customary  regular fees to directors of the Company who are not employees of
the Company, (iv) any payments or other transactions pursuant to any tax-sharing
agreement  between the Company and any other Person with which the Company files
a  consolidated  tax return or with which the Company is part of a  consolidated
group for tax purposes,  (v) any  Restricted  Payments not prohibited by Section
13.6 or (vii) [other matters].  Notwithstanding  the foregoing,  any transaction
covered by the first  paragraph  of this Section 13.2 and not covered by clauses
(ii) through (v) of this paragraph, the aggregate amount of which exceeds $[___]
million  in value,  must be  approved  or  determined  to be fair in the  manner
provided for in clause (i)(A) or (B) above.

                  13.3. Tax  Consolidation.  The Company will not, except as may
be required by any mandatory provision of applicable law, file or consent to the
filing of any  consolidated  income  tax  return  with any  Person  other than a
Subsidiary.

                  13.4.  Compliance  with ERISA.  The Company will not, and will
not permit any ERISA Affiliate to:

                            (a) engage in any  transaction  in  connection  with
         which  the  Company  or any  Subsidiary  could be  subject  to either a
         material civil penalty assessed  pursuant to Section 502(i) of ERISA or
         a material tax imposed by Section 4975 of the Code;


                                      -31-

<PAGE>

                            (b)  terminate  any  Plan in a  manner,  or take any
         other  action,  which could  result in any  material  liability  of the
         Company or any ERISA Affiliate to the PBGC; or

                            (c)  fail  to  make  full  payment  when  due of all
         amounts  (including  any  amounts  because  of an  accumulated  funding
         deficiency) which, under the provisions of any Plan, the Code or ERISA,
         the Company or any ERISA Affiliate is required to pay as  contributions
         to such Plan or otherwise.

As used in this Section 13.4, the term "accumulated  funding deficiency" has the
meaning specified in Section 302 of ERISA and Section 412 of the Code.

                  13.5.     Limitation on Indebtedness.
                            --------------------------

                            (a) The Company will not, and will not permit any of
its Restricted  Subsidiaries to, Incur any  Indebtedness  (other than the Senior
Notes,  the Debentures and  Indebtedness  existing on the Senior Notes Reduction
Date);  provided that the Company may Incur Indebtedness if, after giving effect
to the Incurrence of such  Indebtedness  and the receipt and  application of the
proceeds therefrom,  the Consolidated  Leverage Ratio would be greater than zero
and less than [_] to 1, for Indebtedness  Incurred on or prior to [_________ __,
199_], or [_] to 1, for Indebtedness Incurred thereafter.

                            Notwithstanding  the foregoing,  the Company and any
Restricted  Subsidiary (except as specified below) may Incur each and all of the
following:  (i) Indebtedness outstanding at any time (A) Incurred to finance the
purchase,  construction,  launch,  insurance for and other costs with respect to
Orion 2 and Orion 3 and (B) in an aggregate  principal  amount not to exceed (1)
until Orion 2 or Orion 3 has been successfully  delivered in orbit, $50 million,
(2)  after the first of Orion 2 or Orion 3 has been  successfully  delivered  in
orbit,  $100  million  and (3) after  the  second of Orion 2 or Orion 3 has been
successfully  delivered in orbit,  $150 million,  in each case under this clause
(i)(B),  less any amount of  Indebtedness  permanently  repaid as provided under
Section  13.11;   (ii)   Indebtedness  (A)  to  the  Company   evidenced  by  an
unsubordinated  promissory  note or (B) to any of its  Restricted  Subsidiaries;
provided that any event which results in any such Restricted  Subsidiary ceasing
to be a Restricted  Subsidiary or any subsequent  transfer of such  Indebtedness
(other than to the Company or another Restricted Subsidiary) shall be deemed, in
each case, to constitute  an  Incurrence of such  Indebtedness  not permitted by
this clause (ii); (iii) Indebtedness issued in exchange for, or the net proceeds
of which are used to refinance or refund, then outstanding  Indebtedness,  other
than  Indebtedness  Incurred under clause (i)(B),  (ii), (iv), (vi) or (viii) of
this  paragraph,  and any  refinancings  thereof  in an amount not to exceed the
amount so refinanced or refunded  (plus  premiums,  accrued  interest,  fees and
expenses);  provided that  Indebtedness the proceeds of which are used to redeem
or  repurchase  the  Debentures  or  Indebtedness  that is pari passu  with,  or
subordinated  in right of payment  to, the  Debentures  shall only be  permitted
under  this  clause  (iii)  if  (A) in  case  the  Debentures  are  redeemed  or
repurchased in part or the  Indebtedness to be refinanced is pari passu with the
Debentures, such new Indebtedness, by its terms or by the terms of any 
                                                    
                                      -32-

<PAGE>

agreement or instrument  pursuant to which such new Indebtedness is outstanding,
is expressly  made pari passu with, or  subordinate  in right of payment to, the
remaining  Debentures,  (B)  in  case  the  Indebtedness  to  be  refinanced  is
subordinated in right of payment to the Debentures,  such new  Indebtedness,  by
its terms or by the terms of any agreement or instrument  pursuant to which such
new Indebtedness is issued or remains outstanding, is expressly made subordinate
in  right  of  payment  to the  Debentures  at  least  to the  extent  that  the
Indebtedness to be refinanced is subordinated to the Debentures and (C) such new
Indebtedness,  determined as of the date of Incurrence of such new Indebtedness,
does  not  mature  prior  to  the  Stated  Maturity  of the  Indebtedness  to be
refinanced  or  refunded,  and the Average Life of such new  Indebtedness  is at
least equal to the remaining  Average Life of the  Indebtedness to be refinanced
or refunded;  and  provided  further  that in no event may  Indebtedness  of the
Company be refinanced by means of any Indebtedness of any Restricted  Subsidiary
pursuant to this clause (iii);  (iv) Indebtedness (A) in respect of performance,
surety or appeal bonds  provided in the ordinary  course of business,  (B) under
Currency Agreements and Interest Rate Agreements;  provided that such agreements
(a) are  designed  solely to protect  the  Company or its  Subsidiaries  against
fluctuations in foreign currency exchange rates or interest rates and (b) do not
increase the Indebtedness of the obligor outstanding at any time other than as a
result of fluctuations in foreign  currency  exchange rates or interest rates or
by reason of fees,  indemnities  and  compensation  payable  thereunder  and (C)
arising from agreements  providing for  indemnification,  adjustment of purchase
price or similar  obligations,  or from Guarantees or letters of credit,  surety
bonds or performance bonds securing any obligations of the Company or any of its
Restricted  Subsidiaries  pursuant to such  agreements,  in any case Incurred in
connection with the disposition of any business, assets or Restricted Subsidiary
of the Company  (other than  Guarantees of  Indebtedness  Incurred by any Person
acquiring all or any portion of such business,  assets or Restricted  Subsidiary
of the Company for the purpose of financing  such  acquisition),  in a principal
amount not to exceed the gross proceeds  actually received by the Company or any
Restricted  Subsidiary in connection with such disposition;  (v) Indebtedness of
the  Company,  to the extent the net  proceeds  thereof are promptly (A) used to
purchase the Senior Notes in accordance with the redemption,  repurchase  and/or
change of control  provisions of the Senior Note  Indentures or (B) deposited to
defease the Senior Notes in  accordance  with the Senior Note  Indentures;  (vi)
Guarantees  by any  Restricted  Subsidiary  under the  Subsidiary  Guarantee  or
permitted by and made in accordance with Section 13.8 or the Senior  Indentures;
(vii)  Indebtedness  Incurred to finance the cost (including the cost of design,
development, construction, installation or integration) of equipment (other than
Orion 2 and Orion 3) or  inventory  acquired  by the  Company or a Wholly  Owned
Restricted Subsidiary after the Closing Date; (viii) Indebtedness of the Company
not to exceed, at any one time outstanding,  two (2) times the Net Cash Proceeds
received by the Company after the Closing Date from the issuance and sale of its
Capital  Stock  (other  than  Disqualified  Stock)  to a  Person  that  is not a
Subsidiary of the Company (less the amount of such proceeds  applied as provided
in clause  (C)(2) of the first  paragraph  or clause (iii) or (iv) of the second
paragraph of Section  13.6),  provided  that such  Indebtedness  does not mature
prior  to  the  Stated   Maturity  of  the   Debentures;   and  (ix)  Redemption
Indebtedness.

                            (b)  Notwithstanding  any  other  provision  of this
Section  13.5,  the  maximum  amount  of  Indebtedness  that  the  Company  or a
Restricted Subsidiary may incur

                                      -33-

<PAGE>

pursuant to this Section  13.5 shall not be deemed to be exceeded,  with respect
to any outstanding Indebtedness, due solely to the result of fluctuations in the
exchange rates of currencies.


                            (c)  For  purposes  of  determining  any  particular
amount of  Indebtedness  under  this  Section  13.5,  (1)  Guarantees,  Liens or
obligations with respect to letters of credit supporting  Indebtedness otherwise
included in the  determination  of such particular  amount shall not be included
and (2) any Liens granted pursuant to the equal and ratable provisions  referred
to in  Section  13.9  shall not be  treated as  Indebtedness.  For  purposes  of
determining  compliance  with this  Section  13.5,  in the event that an item of
Indebtedness  meets  the  criteria  of  more  than  one  (1)  of  the  types  of
Indebtedness   described  in  the  above  clauses,  the  Company,  in  its  sole
discretion,  shall  classify such item of  Indebtedness  and only be required to
include the amount and type of such Indebtedness in one of such clauses.

                  13.6. Limitation on Restricted Payments. The Company will not,
and will not permit any Restricted  Subsidiary,  directly or indirectly,  to (i)
declare or pay any dividend or make any  distribution  on or with respect to its
Capital  Stock (other than (x)  dividends  or  distributions  payable  solely in
shares of its  Capital  Stock  (other  than  Disqualified  Stock) or in options,
warrants or other  rights to acquire  shares of such  Capital  Stock and (y) pro
rata dividends or distributions on Common Stock of Restricted  Subsidiaries held
by minority  stockholders,  provided that such dividends do not in the aggregate
exceed  the   minority   stockholders'   pro  rata  share  of  such   Restricted
Subsidiaries'  net  income  from the first day of the fiscal  quarter  beginning
immediately  following  the Closing Date) held by Persons other than the Company
or any  of  its  Restricted  Subsidiaries,  (ii)  purchase,  redeem,  retire  or
otherwise  acquire  for value any shares of Capital  Stock of the  Company,  any
Guarantor or an Unrestricted  Subsidiary  (including options,  warrants or other
rights to acquire such shares of Capital  Stock) held by Persons  other than the
Company and its wholly-owned subsidiaries,  (iii) make any voluntary or optional
principal payment, or voluntary or optional redemption,  repurchase, defeasance,
or other  acquisition or retirement for value,  of  Indebtedness  of the Company
that is  subordinated  in right of payment to the Debentures or of any Guarantor
that is  subordinated to the Subsidiary  Guarantee  (other than in each case the
purchase,  repurchase or the  acquisition of  Indebtedness  in  anticipation  of
satisfying a sinking fund obligation,  principal  installment or final maturity,
in any case due within one (1) year of the date of acquisition) or (iv) make any
Investment,  other than a Permitted Investment,  in any Person (such payments or
any other  actions  described  in clauses  (i) through  (iv) being  collectively
"Restricted  Payments")  if, at the time of,  and after  giving  effect  to, the
proposed  Restricted  Payment:  (A) a  Potential  Event of  Default  or Event of
Default  shall have  occurred  and be  continuing,  (B) except  with  respect to
Investments  and  dividends  on the Common Stock of any  Guarantor,  the Company
could not Incur at least $1.00 of  Indebtedness  under  paragraph (a) of Section
13.5 or (C) the aggregate  amount of all  Restricted  Payments  (the amount,  if
other than in cash,  to be  determined  in good faith by the Board of Directors,
whose  determination  shall be conclusive  and evidenced by a Board  Resolution)
made after the Closing Date shall exceed the sum of (1) fifty  percent  (50%) of
the aggregate  positive amount, if any, of the Adjusted  Consolidated Net Income
(determined  by  excluding  income  resulting  from  transfers  of assets by the
Company or a Restricted  Subsidiary to an Unrestricted  Subsidiary) accrued on a
cumulative  basis  during  the  

                                      -34-

<PAGE>

period (taken as one (1)  accounting  period)  beginning on the first day of the
fiscal quarter immediately following the Closing Date and ending on the last day
of the last fiscal quarter preceding the Transaction Date for which reports have
been filed with the Commission plus (2) the aggregate Net Cash Proceeds received
by the Company or any  Guarantor  after the Closing  Date from the  issuance and
sale of its Capital Stock (other than Disqualified Stock) to a Person who is not
a  Subsidiary  of the Company or any  Guarantor or from the issuance to a Person
who is not a Subsidiary of the Company or any Guarantor of any options, warrants
or other rights to acquire Capital Stock of the Company (in each case, exclusive
of any other than Disqualified Stock, options, warrants or other rights that are
redeemable at the option of the holder, or are required to be redeemed, prior to
the Stated Maturity of the  Debentures),  in each case except to the extent such
Net Cash  Proceeds are used to Incur  Indebtedness  pursuant to clause (viii) of
the  second  paragraph  of  Section  13.5,  plus (3) an amount  equal to the net
reduction in Investments (other than reductions in Permitted Investments) in any
Person  resulting  from  payments  of  interest  on   Indebtedness,   dividends,
repayments of loans or advances,  or other transfers of assets,  in each case to
the Company or any Restricted  Subsidiary or from the Net Cash Proceeds from the
sale of any such  Investment  (except,  in each  case,  to the  extent  any such
payment or proceeds are included in the calculation of Adjusted Consolidated Net
Income),  or from  redesignations  of  Unrestricted  Subsidiaries  as Restricted
Subsidiaries   (valued  in  each  case  as   provided  in  the   definition   of
"Investments"),  not  to  exceed,  in  each  case,  the  amount  of  Investments
previously  made by the Company or any  Restricted  Subsidiary in such Person or
Unrestricted Subsidiary.

                            The  foregoing  provision  shall not be  violated by
reason of: (i) the payment of any dividend within sixty (60) days after the date
of  declaration  thereof if, at said date of  declaration,  such  payment  would
comply with the foregoing paragraph; (ii) the redemption, repurchase, defeasance
or  other   acquisition  or  retirement  for  value  of  Indebtedness   that  is
subordinated in right of payment to the Debentures  including  premium,  if any,
and accrued  and unpaid  interest,  with the  proceeds  of, or in exchange  for,
Indebtedness  Incurred under clause (iii) of the second paragraph of part (a) of
Section 13.5; (iii) the repurchase,  redemption or other  acquisition of Capital
Stock of the  Company (or  options,  warrants  or other  rights to acquire  such
Capital  Stock) in  exchange  for,  or out of the  proceeds  of a  substantially
concurrent  offering of shares of Capital Stock (other than Disqualified  Stock)
of the  Company;  (iv) the making of any  principal  payment or the  repurchase,
redemption,   retirement,   defeasance  or  other   acquisition   for  value  of
Indebtedness  of the Company  which is  subordinated  in right of payment to the
Debentures  in  exchange  for,  or out  of  the  proceeds  of,  a  substantially
concurrent  offering of, shares of the Capital Stock of the Company  (other than
Disqualified  Stock);  (v) payments or distributions to dissenting  stockholders
pursuant to applicable law,  pursuant to or in connection with a  consolidation,
merger or transfer of assets that complies with the provisions of this Agreement
applicable to mergers,  consolidations and transfers of all or substantially all
of the property and assets of the Company;  (vi) the  repurchase,  redemption or
other acquisition of outstanding  shares of Series A Preferred Stock or Series B
Preferred Stock,  which shares were outstanding on the Closing Date, in exchange
for,  or out of the  proceeds  of, an issuance of  Indebtedness  Incurred  under
clause  (ix) of the  second  paragraph  of part (a) of  Section  13.5;  or (vii)
investments,  to the  extent  the amount  invested  consists  solely of Net Cash
Proceeds 
                                      -35-

<PAGE>


received by the Company or any Guarantor substantially currently with the making
of such Investment from the issuance and sale permitted by this Agreement of its
Capital  Stock  (other  than  Disqualified  Stock)  to a  Person  who  is  not a
Subsidiary of the Company or any Guarantor; provided that, except in the case of
clauses (i) and (iii),  no Potential  Event of Default or Event of Default shall
have  occurred and be  continuing  or occur as a  consequence  of the actions or
payments set forth therein.

                            Each Restricted  Payment  permitted  pursuant to the
preceding  paragraph  (other than the Restricted  Payment  referred to in clause
(ii) thereof and an exchange of Capital Stock for Capital Stock or  Indebtedness
referred to in clause (iii) or (iv)  thereof) and the Net Cash Proceeds from any
issuance  of  Capital  Stock  referred  to in  clauses  (iii) and (iv)  shall be
included  in  calculating  whether  the  conditions  of clause  (C) of the first
paragraph  of this  Section  13.6 have been met with  respect to any  subsequent
Restricted  Payments.  In the event the proceeds of an issuance of Capital Stock
of the Company are used for the redemption,  repurchase or other  acquisition of
the Debentures, or Indebtedness that is pari passu with the Debentures, then the
Net Cash Proceeds of such issuance  shall be included in clause (C) of the first
paragraph of this Section 13.6 only to the extent such proceeds are not used for
such redemption, repurchase or other acquisition of Indebtedness.

                            Any  Restricted  Payments  made  other  than in cash
shall be valued at fair market value. The amount of any Investment "outstanding"
at any time shall be deemed to be equal to the amount of such  Investment on the
date  made,  less the  return  of  capital  to the  Company  and its  Restricted
Subsidiaries  with  respect  to  such  Investment  (up to  the  amount  of  such
Investment on the date made).

                  13.7.  Limitation on the Issuance and Sale of Capital Stock of
Restricted  Subsidiaries.  The  Company  will not sell,  and will not permit any
Restricted Subsidiary,  directly or indirectly,  to issue or sell, any shares of
Capital Stock of a Restricted Subsidiary  (including options,  warrants or other
rights to purchase  shares of such Capital Stock) except (i) to the Company or a
Wholly Owned  Restricted  Subsidiary;  (ii)  issuances of director's  qualifying
shares or sales to  foreign  nationals  of shares of  Capital  Stock of  foreign
Restricted Subsidiaries, to the extent required by applicable law; and (iii) if,
immediately  after  giving  effect to such  issuance  or sale,  such  Restricted
Subsidiary  would no longer  constitute  a Restricted  Subsidiary,  provided any
Investment in such Person remaining after giving effect to such issuance or sale
would have been  permitted to be made under Section 13.6, if made on the date of
such issuance or sale.

                  13.8. Issuances of Guarantees by New Restricted  Subsidiaries.
On the date that any Person  becomes a  Restricted  Subsidiary  the Company will
cause such additional Restricted Subsidiary to execute a supplemental Subsidiary
Guarantee,  providing for a full and unconditional  guarantee by such additional
Restricted Subsidiary of the Company's obligations under the Debentures and this
Agreement to the same extent as that set forth in the Subsidiary Guarantee.


                                      -36-

<PAGE>


                  13.9.  Limitation on Liens. The Company will not, and will not
permit any Restricted  Subsidiary to, create,  incur,  assume or suffer to exist
any  Lien  of any  kind  securing  Indebtedness  that  is pari  passu  with,  or
subordinated  in right of  payment  to, the  Debentures  on any of its assets or
properties of any character,  or any shares of Capital Stock or  Indebtedness of
any Restricted  Subsidiary,  without making  effective  provision for all of the
Debentures and all other amounts due under this Agreement to be directly secured
equally and ratably  with (or, if the  obligation  or liability to be secured by
such Lien is subordinated  in right of payment to the Debentures,  prior to) the
obligation or liability secured by such Lien.

                            The foregoing limitation does not apply to (i) Liens
existing on the Closing  Date;  (ii) Liens granted after the Closing Date on any
assets or Capital Stock of the Company or its Restricted Subsidiaries created in
favor of the holders of Debentures;  (iii) Liens with respect to the assets of a
Restricted  Subsidiary granted by such Restricted Subsidiary to the Company or a
Wholly Owned Restricted  Subsidiary to secure  Indebtedness owing to the Company
or such other Restricted  Subsidiary;  (iv) Liens securing Indebtedness which is
Incurred to  refinance  secured  Indebtedness  which is permitted to be Incurred
under clause (iii) of the second  paragraph of Section  13.5(a);  provided  that
such Liens do not extend to or cover any  property  or assets of the  Company or
any  Restricted  Subsidiary  other  than the  property  or assets  securing  the
Indebtedness being refinanced; or (v) Permitted Liens.

                            The  Company  will  not,  and  will not  permit  any
Restricted  Subsidiary  to,  create,  incur,  assume or suffer to exist any Lien
(securing   Indebtedness)   on  Orion  2  or  Orion  3.  


                  13.10. Limitation on Sale-Leaseback Transactions.  The Company
will  not,  and will not  permit  any  Restricted  Subsidiary  to,  directly  or
indirectly,  enter  into any  sale-leaseback  transaction  involving  any of its
assets or  properties,  whether  now owned or  hereafter  acquired,  whereby the
Company or a Restricted  Subsidiary sells or transfers such assets or properties
and then or  thereafter  leases such assets or properties or any part thereof or
any other assets or properties which the Company or such Restricted  Subsidiary,
as the  case may be,  intends  to use for  substantially  the  same  purpose  or
purposes as the assets or properties sold or transferred.

                            The  foregoing  restriction  does  not  apply to any
sale-leaseback  transaction if (i) the lease is for a period,  including renewal
rights,  of not in excess of three (3) years;  (ii) the lease secures or relates
to industrial  revenue or pollution  control  bonds;  (iii) the  transaction  is
solely between the Company and any Wholly Owned Restricted  Subsidiary or solely
between  Wholly  Owned  Restricted  Subsidiaries;  or (iv) the  Company  or such
Restricted  Subsidiary,  within twelve (12) months after the sale or transfer of
any assets or properties  is completed,  applies an amount not less than the net
proceeds received from such sale in accordance with clause (A) or (B) of Section
13.11.

                  13.11.  Limitation  on Asset Sales.  The Company will not, and
will not permit any Restricted  Subsidiary to,  consummate any Asset Sale unless
(i) the consideration  received by the Company or such Restricted  Subsidiary is
at least  equal to the fair  market  value of the assets sold or disposed of and
(ii) at least eighty-five  percent (85%) of the consideration  

                                      -37-

<PAGE>


received consists of cash or Temporary Cash Investments. In the event and to the
extent  that  the  Net  Cash  Proceeds  received  by the  Company  or any of its
Restricted  Subsidiaries  from one or more Asset Sales occurring on or after the
Senior  Notes  Reduction  Date in any period of twelve (12)  consecutive  months
exceed  ten  percent  (10%)  of  Adjusted   Consolidated   Net  Tangible  Assets
(determined as of the date closest to the commencement of such twelve (12) month
period  for  which  a  consolidated   balance  sheet  of  the  Company  and  its
Subsidiaries  has been filed with the  Commission),  then the  Company  shall or
shall cause the relevant Restricted Subsidiary to within twelve months after the
date  Net Cash  Proceeds  so  received  exceed  ten  percent  (10%) of  Adjusted
Consolidated  Net  Tangible  Assets (A) apply an amount equal to such excess Net
Cash  Proceeds  to  permanently  repay  Senior  Indebtedness  of the  Company or
Indebtedness of any Restricted Subsidiary,  in each case owing to a Person other
than the Company or any of its  Restricted  Subsidiaries  or (B) invest an equal
amount,  or the amount not so  applied  pursuant  to clause (A) (or enter into a
definitive agreement committing to so invest within twelve (12) months after the
date of such agreement),  in property or assets (other than current assets) of a
nature or type or that are used in a business (or in a company  having  property
and assets of a nature or type, or engaged in a business)  similar or related to
the  nature or type of the  property  and  assets  of, or the  business  of, the
Company and its Restricted Subsidiaries existing on the date of such investment.

                  13.12.  Insurance.  The Company  will  maintain  (a)  in-orbit
insurance  with  respect to Orion 1 in an amount  equal to or greater  than $___
million,  and (b) with  respect to Orion 2, Orion 3, each other  satellite to be
launched  by the  Company  or any  Restricted  Subsidiary  and each  replacement
satellite  therefor,  (i) launch  insurance  with respect to each such satellite
covering  the period from the launch of such  satellite  to one  hundred  eighty
(180) days  following  such launch in an amount equal to or greater than the sum
of (A) the cost to replace such satellite  pursuant to the contract  pursuant to
which a  replacement  satellite  will be  constructed,  (B) the cost to launch a
replacement  satellite  pursuant to the contract pursuant to which a replacement
satellite  will be  launched  and (C) the  cost of  launch  insurance  for  such
satellite  or, in the event that the Company has reason to believe that the cost
of  obtaining  comparable  insurance  for  a  replacement   satellite  would  be
materially  higher,  the Company's best estimate of the cost of such  comparable
insurance  and (ii) at all times  subsequent  to one hundred  eighty [(180) days
after]  the  launch  (if it is a  Successful  Launch)  of each  such  satellite,
in-orbit  insurance  in an amount  at least  equal to the cost to  replace  such
satellite  with a satellite of comparable or superior  technological  capability
(as  estimated  by  the  Board  of  Directors)  and  having  at  least  as  much
transmission capacity as such satellite. The in-orbit insurance required by this
paragraph  shall  provide that if fifty  percent  (50%) or more of a satellite's
initial  capacity  is lost,  the full  amount of  insurance  will become due and
payable,  and that if a satellite  is able to maintain  more than fifty  percent
(50%) but less than ninety  percent  (90%) of its initial  capacity,  a pro rata
portion of such insurance will become due and payable. The insurance required by
this  paragraph  shall name the Company  and/or any  Guarantor  as the sole loss
payee or payees, as the case may be, thereof.

         In the event that the Company (or a Guarantor)  receives  proceeds from
insurance  relating to any  satellite,  the Company (or a  Guarantor)  may use a
portion of such  proceeds  to repay any  

                                      -38-

<PAGE>


vendor or  third-party  purchase  money  financing  pertaining to such satellite
(other  than Orion 1) that is required to be repaid by reason of the loss giving
rise to such  insurance  proceeds.  The  Company  (or a  Guarantor)  may use the
remainder  of  such  proceeds  to  develop,   construct,  launch  and  insure  a
replacement satellite (including components for a related ground station) if (i)
such replacement satellite is of comparable or superior technological capability
as  compared  with  the  satellite  being  replaced  and  has at  least  as much
transmission  capacity as the satellite being replaced and (ii) the Company will
have  sufficient   funds  to  service  the  Company's   projected  debt  service
requirements  until the scheduled launch of such  replacement  satellite and for
one (1) year  thereafter  and to develop,  construct,  launch and insure (in the
amounts  required  by  the  preceding  paragraph)  such  replacement  satellite,
provided  that such  replacement  satellite is  scheduled to be launched  within
fifteen (15) months of the receipt of such proceeds.  Any such proceeds not used
as permitted by this  paragraph  shall be applied,  within  ninety (90) days, to
reduce Indebtedness of the Company.

         Section  12.3(b) shall cease to apply after the Senior Notes  Reduction
Date.

         14.      Subordination of Debentures.
                  ---------------------------
                  14.1.  Debentures  Subordinated  to Senior  Indebtedness.  The
Company  covenants  and agrees,  and each holder of a  Debenture,  whether  upon
original  issue  or  upon  transfer,  assignment  or  exchange  thereof  by  his
acceptance  thereof,  likewise covenants and agrees,  that, to the extent and in
the  manner  hereinafter  set  forth in this  Section  14,  the  payment  of the
principal  of  and  interest  (except  interest  paid  in  the  form  of  Junior
Securities)  on  each  and  all of the  Debentures  are  hereby  expressly  made
subordinate and subject in right of payment to the prior payment in full in cash
or cash equivalents of all Senior Indebtedness.

                  14.2. Liquidation;  Dissolution;  Bankruptcy.  In the event of
(a) any  insolvency  or  bankruptcy  case or  proceeding,  or any  receivership,
liquidation,  reorganization  or other  similar case or proceeding in connection
therewith,  relative  to the  Company or to its  creditors,  as such,  or to its
assets,  (b) any  liquidation,  dissolution  or other winding up of the Company,
whether  voluntary or  involuntary  and whether or not  involving  insolvency or
bankruptcy,  or (c) any  assignment  for the benefit of  creditors  or any other
marshalling of assets and liabilities of the Company, then and in any such event
specified in (a), (b) or (c) above (each such event,  if any,  herein  sometimes
referred  to as a  "Proceeding")  the  holders of Senior  Indebtedness  shall be
entitled to receive  payment in full in cash or cash  equivalents of all amounts
due or to become due on or in respect of all Senior  Indebtedness,  or provision
shall be made for such  payment in cash or cash  equivalents  or  otherwise in a
manner satisfactory to the holders of Senior Indebtedness, before the holders of
the Debentures are entitled to receive any payment or  distribution  of any kind
or  character,  whether in cash,  property  or  securities  (other  than  Junior
Securities  paid as interest on the  Debentures),  on account of principal of or
interest on the Debentures or on account of any purchase or other acquisition of
Debentures by the Company or any  Subsidiary of the Company (all such  payments,
distributions,  purchases and acquisitions  herein referred to, individually and
collectively,  as a  "Debenture  Payment"),  and to that end the  holders of all
Senior Indebtedness shall be entitled to receive, for application to 

                                      -39-

<PAGE>


the payment thereof,  any Debenture  Payment which may be payable or deliverable
in respect of the Debentures in any such Proceeding.

                            To the  extent any  payment  of Senior  Indebtedness
(whether by or on behalf of the Company,  as proceeds of security or enforcement
of  any  right  of  setoff   orotherwise)   is  declared  to  be  fraudulent  or
preferential,  set aside or  required  to be paid to any  receiver,  trustee  in
bankruptcy,  liquidating  trustee,  agent  or other  similar  Person  under  any
bankruptcy, insolvency, receivership, fraudulent conveyance or similar law, then
if such  payment is  recovered  by, or paid over to, such  receiver,  trustee in
bankruptcy,  liquidating  trustee,  agent or other  similar  Person,  the Senior
Indebtedness or part thereof originally intended to be satisfied shall be deemed
to be reinstated and outstanding as if such payment had not occurred.

                            In the event  that,  notwithstanding  the  foregoing
provisions of this Section,  the holder of any Debenture shall have received any
Debenture  Payment  before  all Senior  Indebtedness  is paid in full or payment
thereof  provided  for in cash or cash  equivalents  or  otherwise  in a  manner
satisfactory to the holders of Senior Indebtedness,  then and in such event such
Debenture  Payment  shall be received  and held in trust for the benefit of, and
shall  be  paid  over or  delivered  forthwith  to the  trustee  in  bankruptcy,
receiver, liquidating trustee, custodian, assignee, agent or other Person making
payment or  distribution of assets of the Company for application to the payment
of all Senior Indebtedness  remaining unpaid, to the extent necessary to pay all
Senior  Indebtedness in full,  after giving effect to any concurrent  payment or
distribution to or for the holders of Senior Indebtedness.

                            For purposes of this Section 14 only, the words "any
payment or distribution of any kind or character,  whether in cash,  property or
securities"  shall not be deemed to include  (a) any  payment of interest on the
Debentures made solely in Junior  Securities or (b) a payment or distribution of
stock or securities of the Company provided for by a plan of  reorganization  or
readjustment  authorized  by  an  order  or  decree  of  a  court  of  competent
jurisdiction in a reorganization  proceeding under any applicable bankruptcy law
or of any  other  corporation  provided  for by such plan of  reorganization  or
readjustment  which stock or securities are  subordinated in right of payment to
all then  outstanding  Senior  Indebtedness  at least to the same  extent as the
Debentures are so subordinated as provided in this Section 14; provided that (1)
if a new corporation  results from such  reorganization  or  readjustment,  such
corporation assumes the Senior Indebtedness and (2) the rights of the holders of
the Senior Indebtedness are not, without the consent of such holders, altered by
such  reorganization or readjustment.  The consolidation of the Company with, or
the merger of the Company into, another Person or the liquidation or dissolution
or the  Company  following  the  conveyance,  transfer,  sale or lease of all or
substantially  all of its properties and assets to another Person upon the terms
and  conditions  set forth in  either  Section  12.6 or  Section  13.1,  as then
applicable, shall not be deemed a Proceeding for the purposes of this Section if
the Person formed by such  consolidation  or into which the Company is merged or
the Person which acquires by conveyance, transfer, sale or lease such properties
and assets, as the case may be, shall, as a part of such consolidation,  merger,
conveyance,  transfer,  sale or lease  comply with the  conditions  set forth in
either Section 12.6 or Section 13.1, as then applicable.
                  

                                      -40-

<PAGE>


                  14.3.  Default on Senior  Indebtedness.  In the event that any
Senior Payment Default (as defined below) shall have occurred and be continuing,
then no Debenture  Payment shall be made directly or indirectly unless and until
such Senior Payment Default shall have been cured or waived, such default or the
benefits of this sentence  shall have been waived or shall have ceased to exist,
or all amounts then due and payable in respect of Senior  Indebtedness  to which
such Senior Payment  Default  relates shall have been paid in full, or provision
shall have been made for such payment in cash or cash  equivalents  or otherwise
in a manner satisfactory to the holders of Senior Indebtedness.  "Senior Payment
Default" means any default in the payment of principal of or premium, if any, or
interest on all or any portion of the Senior Indebtedness.

                            In   addition,   in  the  event   that  any   Senior
Nonmonetary  Default (as defined  below) shall have occurred and be  continuing,
then,  upon  the  receipt  by the  Company  of  written  notice  of such  Senior
Nonmonetary  Default from any holder, or a trustee on behalf of a holder of such
Senior Indebtedness, of the Senior Indebtedness to which such Senior Nonmonetary
Default  relates,  then the Company may not  directly  or  indirectly,  make any
payments in respect of the Debentures  (other than payment of interest in shares
of Junior  Securities or payment of other  subordinated  securities  issued in a
reorganization  proceeding,  each as provided in the fourth paragraph of Section
14.2 or payments  from funds  previously  segregated  or  deposited  in trust to
redeem or repurchase the Debentures  under this Purchase  Agreement)  during the
period (the "Payment Blockage Period") commencing on the date of such receipt by
the Company of such written notice and ending on the earlier of (i) the date, if
any, on which the Senior  Indebtedness to which such Senior Nonmonetary  Default
relates is discharged or such Senior  Nonmonetary  Default shall have been cured
or waived in  writing  or shall  have  ceased to exist and any  acceleration  of
Senior  Indebtedness to which such Senior Nonmonetary Default relates shall have
been  rescinded or annulled and (ii) the one hundred  seventy-ninth  (179th) day
after the date of such receipt of such written notice.  Notwithstanding anything
in this Agreement to the contrary,  no more than one Payment Blockage Period may
be commenced with respect to the  Debentures  during any period of three hundred
sixty (360) consecutive days and there shall be a period of at least one hundred
eighty  (180)  consecutive  days in each  period of three  hundred  sixty  (360)
consecutive  days when no Payment  Blockage  Period is in effect.  Following the
commencement of any Payment Blockage Period, the holders of Senior  Indebtedness
shall be precluded from  commencing a subsequent  Payment  Blockage Period until
the  conditions set forth in the preceding  sentence shall have been  satisfied.
For all purposes of this paragraph,  no Senior Nonmonetary  Default that existed
or was continuing (it being  acknowledged  that any subsequent action that would
give rise to an event of default  pursuant to any provision under which an event
of default  previously existed or was continuing shall constitute a new event of
default for this purpose) on the date of  commencement  of any Payment  Blockage
Period with respect to the Senior Indebtedness  initiating such Payment Blockage
Period shall be, or may be made, the basis for the  commencement of a subsequent
Payment Blockage Period with respect to the Senior Indebtedness  initiating such
blockage period unless such Senior Nonmonetary  Default shall have been cured or
waived  for a period of not less than  ninety  (90)  consecutive  days.  "Senior
Nonmonetary  Default" means any default (other than a Senior Payment Default) or
any event (other than a Senior Payment Default) which,  after notice or lapse or
time (or 

                                      -41-

<PAGE>

both),  would  become  an event  of  default,  under  the  terms  of any  Senior
Indebtedness  permitting  one or more holders of such Senior  Indebtedness  or a
trustee or agent on behalf of a holder of Senior  Indebtedness  to declare  such
Senior  Indebtedness  due and  payable  prior  to the  date on  which  it  would
otherwise become due and payable.


                            In the event that,  notwithstanding  the  foregoing,
the Company  shall make any  Debenture  Payment to any holder  prohibited by the
foregoing  provisions of this Section  14.3,  then and in such event the Company
shall  promptly  notify the holders of Senior  Indebtedness  of such  prohibited
payment  and such  payment  shall be held in trust for the  benefit of, and such
Debenture Payment shall be paid over and delivered  forthwith to the Company for
the benefit of the holders of Senior Indebtedness.

                            The  provisions  of this Section  shall not apply to
any Debenture Payment with respect to which Section 14.2 would be applicable.

                  14.4.  Payment  Permitted If No Default.  Nothing contained in
this  Section 14 or in any of the  Debentures  insofar as they  incorporate  the
provisions  of this  Section 14 shall  prevent the  Company,  at any time except
during the pendency of any  Proceeding  referred to in Section 14.2 or under the
conditions described in Section 14.3, from making Debenture Payments.

                  14.5. Subrogation to Rights of Holders of Senior Indebtedness.
Subject  to the  payment  in full of all  amounts  due or to become due on or in
respect of Senior  Indebtedness,  or the  provision  for such payment in cash or
cash equivalents or otherwise in a manner  satisfactory to the holders of Senior
Indebtedness, the holders of the Debentures shall be subrogated to the rights of
the holders of such Senior Indebtedness to receive payments and distributions of
cash,  property and securities  applicable to the Senior  Indebtedness until the
principal of and interest on the Debentures  shall be paid in full. For purposes
of such  subrogation,  no payments or distributions to the holders of the Senior
Indebtedness  of any cash,  property or  securities  to which the holders of the
Debentures  would be entitled  except for the provisions of this Section 14, and
no payments over pursuant to the provisions of this Section 14 to the holders of
Senior  Indebtedness  by holders of the Debentures  shall, as among the Company,
its creditors other than holders of Senior  Indebtedness  and the holders of the
Debentures,  be deemed to be a payment or  distribution  by the Company to or on
account of the Senior Indebtedness.

                  14.6.   Provisions  Solely  to  Define  Relative  Rights.  The
provisions  of this  Section 14 are and are  intended  solely for the purpose of
defining the relative  rights of the holders of the  Debentures  on the one hand
and the holders of Senior  Indebtedness on the other hand.  Nothing contained in
this Section 14 or elsewhere in this  Agreement or in the Debentures is intended
to or shall (a) impair,  as among the Company,  its creditors other than holders
of Senior Indebtedness and the holders of the Debentures,  the obligation of the
Company,  which is  absolute  and  unconditional,  to pay to the  holders of the
Debentures  the principal of and interest on the Debentures as and when the same
shall  become due and payable in  accordance  

                                      -42-

<PAGE>


with their  terms;  (b) affect the  relative  rights  against the Company of the
holders of the Debentures and creditors of the Company other than the holders of
Senior Indebtedness;  or (c) prevent the holder of any Debenture from exercising
all remedies  otherwise  permitted  by  applicable  law upon default  under this
Agreement subject to the rights, if any, under this Section 14 of the holders of
Senior Indebtedness to receive cash,  property and securities  otherwise payable
or deliverable to such holder.

                  14.7. Enforcement of Subordination By Holders of Senior Notes;
No  Waiver of  Subordination  Provisions.  Each  holder  of a  Debenture  by his
acceptance  thereof,  if and so long as a Debenture  Payment is prohibited under
this Section 14,  irrevocably  authorizes and empowers (but without imposing any
obligation  on, or any duty to such holder  from) each holder of Senior Notes at
any time outstanding,  and such holder's  representatives,  to demand,  sue for,
collect and receive such holder's ratable share of Debenture  Payments which are
required  to be paid or  delivered  to the  holders  of Senior  Indebtedness  as
provided in this Section 14 in any liquidation or  reorganization of the Company
under the U.S. Federal Bankruptcy Code (an "Insolvency Proceeding"), (A) to file
a proof  of  claim  or debt in the form  required  in an  Insolvency  Proceeding
respecting such holder of Senior Notes' ratable share of such Debenture Payments
in any Insolvency  Proceeding in the name of such holders of Debentures,  and to
prove the  validity,  amount and  priority of such  claim,  and agrees that such
holder is an  authorized  agent  for  purposes  of  Federal  Rule of  Bankruptcy
Procedure 3001(b) (provided, however, if, and to the extent that, the holders of
the Senior Notes (or their  representatives)  have not filed a proof of claim or
interest with respect to the  Debentures in any action or case under the Federal
Bankruptcy  Code at least five (5) Business Days prior to the last date by which
all such  proofs  of claim or  interest  must be filed or  forever  barred,  the
holders  of the  Debentures  or  their  representatives  may (but  shall  not be
obligated to) file proofs of claim or interest with respect to the  Debentures);
(B) to vote the claim  respecting  such holder of Senior Notes' ratable share of
such  Debenture  Payments  in  any  Insolvency  Proceeding,  including,  without
limitation,  in a proceeding under Chapter 11, Title 11, United States Code; and
(C) to take any such actions as such holder of Senior  Notes,  or such  holder's
representatives, may determine to be reasonably necessary or appropriate for the
enforcement of the provisions set forth in (A) or (B) above.

                            No right of any  present  or  future  holder  of any
Senior  Indebtedness  to enforce  subordination  as herein provided shall at any
time in any way be  prejudiced  or  impaired by any act or failure to act on the
part of the Company or by any act or failure to act, in good faith,  by any such
holder,  or by any  noncompliance by the Company with the terms,  provisions and
covenants of this Agreement, regardless of any knowledge thereof any such holder
may have or be otherwise charged with.

                            Without in any way  limiting the  generality  of the
foregoing  paragraph,  the holders of Senior  Indebtedness  may, at any time and
from time to time,  without  the  consent  of or notice  to the  holders  of the
Debentures,  without  incurring  responsibility to the holders of the Debentures
and without impairing or releasing the subordination provided in this Section 14
or the obligations  hereunder of the holders of the Debentures to the holders of
Senior  Indebtedness,  do any  one  or  more  of the  following:  (i)  amend  or
supplement in any manner 

                                      -43-

<PAGE>


Senior Indebtedness or any instrument evidencing the same or any agreement under
which  Senior  Indebtedness  is  outstanding;  (ii) sell,  exchange,  release or
otherwise deal with any property pledged, mortgaged or otherwise securing Senior
Indebtedness;  (iii) release any Person liable in any manner for the  collection
of Senior Indebtedness;  and (iv) exercise or refrain from exercising any rights
against the Company and any other Person.

                  14.8. Reliance on Judicial Order or Certificate of Liquidating
Agent.  Upon any payment or distribution of assets of the Company referred to in
this  Section 14, the holders of the  Debentures  shall be entitled to rely upon
any order or decree entered by any court of competent jurisdiction in which such
Proceeding is pending, or a certificate of the trustee in bankruptcy,  receiver,
liquidating trustee, custodian,  assignee for the benefit of creditors, agent or
other Person  making such payment or  distribution,  delivered to the holders of
Debentures,  for the purpose of ascertaining the Persons entitled to participate
in such  payment or  distribution,  the holders of the Senior  Indebtedness  and
other  indebtedness of the Company,  the amount thereof or payable thereon,  the
amount or amounts  paid or  distributed  thereon and all other  facts  pertinent
thereto or to this Section 14.

                  14.9. Certain Conversions Deemed Payment.  For the purposes of
this Section 14 only,  (i) the issuance and delivery of Junior  Securities  upon
conversion  of  Debentures  in  accordance  with  Section 15 hereof shall not be
deemed to  constitute  a  Debenture  Payment and (ii) the  payment,  issuance or
delivery of cash,  property or securities  (other than Junior  Securities)  upon
conversion of a Debenture shall be deemed to constitute a Debenture Payment. For
the purposes of this Section 14, the term  "Junior  Securities"  means shares of
any Capital  Stock.  Nothing  contained  in this Section 14 or elsewhere in this
Agreement  or in the  Debentures  is intended to or shall  impair,  as among the
Company, its creditors other than holders of Senior Indebtedness and the holders
of the Debentures, the right, which is absolute and unconditional, of the holder
of any Debenture to convert such Debenture in accordance  with the provisions of
Section 15 hereof.

                  14.10. Not to Prevent Events of Default. The failure to make a
payment  on  account  of  principal  of  premium,  if any,  or  interest  on the
Debentures  by reason of any  provision of this Section 14 will not be construed
as preventing the occurrence of an Event of Default.

         15.      Conversion Rights.
                  -----------------
                  15.1. Conversion Privilege and Conversion Rate. Subject to and
upon  compliance  with the  provisions  of this Section 15, at the option of the
holder thereof, any Debenture may be converted into fully paid and nonassessable
shares  (calculated  as to each  conversion  to the  nearest  one  one-hundredth
(1/100th)  of a share) of Common Stock at the  Conversion  Rate,  determined  as
hereinafter provided, in effect at the time of conversion. Such conversion right
shall  commence on the date of such Debenture and expire the later of (i) at the
close of business on February 1, 2012 or (ii) the date the full principal amount
of all of the  Debentures  and all accrued  interest  thereon  have been paid in
full. In case any  Debentures  

                                      -44-

<PAGE>

are called for  redemption  under  Section 11.2 or 11.3 or the Company  requires
holders of Notes to make a Mandatory  Sale under Section 11.4,  such  conversion
right in respect of any such  Debenture  shall be subject to the  provisions  of
Section 11.5.

                            The rate at which  shares of Common  Stock  shall be
delivered  upon  conversion  (herein  called  the  "Conversion  Rate")  shall be
initially  71.42857 shares of Common Stock for each $1,000  principal  amount of
Debentures.  The  Conversion  Rate shall be  adjusted  in certain  instances  as
provided in this Section 15.

                  15.2. Exercise of Conversion Privilege; Time Conversion Deemed
Effected; Delivery of Stock Certificates; Partial Conversions; Accrued Interest.
In order to exercise the conversion privilege, the holder of any Debenture to be
converted  shall  surrender  such  Debenture,  duly  endorsed or assigned to the
Company or in blank, at the Company's principal executive offices, 2440 Research
Boulevard, Suite 400, Rockville,  Maryland 20850 (or such other office or agency
of the Company as the Company may  designate by notice in writing to each holder
of Debentures), accompanied by written notice to the Company at such office that
the  holder  elects to  convert  such  Debenture  or,  if less  than the  entire
principal  amount  thereof  is  to  be  converted,  the  portion  thereof  to be
converted.

                            A Debenture  shall be deemed to have been  converted
immediately  prior to the  close of  business  on the day of  surrender  of such
Debenture for  conversion in accordance  with the foregoing  provisions,  and at
such time the rights of the holder of such Debenture, as a holder thereof, shall
cease to the extent of the portion of such Debenture  converted,  and the Person
or Persons  entitled to receive the  Conversion  Shares shall be treated for all
purposes as the record  holder or holders  thereof at such time.  As promptly as
practicable  on or after  the date of any  conversion  in full or in part of any
Debenture,  but in no event later than five (5) Business  Days  thereafter,  the
Company  shall,  at its expense  (including  the payment by it of any applicable
issue  taxes),  issue and  deliver to the holder of such  Debenture,  or as such
holder  may  direct,  a  certificate  or  certificates  for the  number  of full
Conversion Shares, together with (a) payment in lieu of any fraction of a share,
as provided in Section 15.3,  and (b) interest  (payable in the form of Interest
Shares as provided in the form of the Debenture) on the principal amount of such
Debenture, or the portion thereof converted, accrued and unpaid to and including
the date of such  conversion,  without any adjustment in respect of any dividend
or other distribution payable on the Conversion Shares.

                            Upon any  partial  conversion  of a  Debenture,  the
Company  will  forthwith  issue and  deliver  to or upon the order of the holder
thereof,  at the  expense of the  Company,  a new  Debenture  or  Debentures  in
aggregate  principal  amount equal to the unpaid and unconverted  portion of the
principal amount of such partially  converted  Debenture.  Such new Debenture or
Debentures  shall be  registered  in the name of such holder and dated as of the
date of the converted Debenture.

                  15.3.  Fractions  of Shares.  No  fractional  shares of Common
Stock shall be issued upon  conversion of any Debenture or  Debentures.  If more
than one (1)  Debenture  shall 

                                      -45-

<PAGE>


be surrendered for conversion at one time (or substantially at the same time) by
the same  holder,  the  number  of full  shares  which  shall be  issuable  upon
conversion  thereof  shall be computed on the basis of the  aggregate  principal
amount of the Debentures so  surrendered.  In place of any  fractional  share of
Common Stock which would  otherwise be issuable upon conversion of any Debenture
or Debentures,  the Company shall calculate and pay a cash adjustment in respect
of such fraction  (calculated  to the nearest one  one-hundredth  (1/100th) of a
share) in an amount equal to the same  fraction of the current  market price per
share of Common Stock  (calculated in accordance  with Section 15.4(8) below) at
the close of business on the day of conversion.

                  15.4.  Adjustments to Conversion  Rate.  The  Conversion  Rate
shall be subject to adjustments from time to time as follows:

                            (1) In case at any time after the  Closing  Date the
         Company shall pay or make a dividend or other distribution on any class
         of Capital  Stock of the  Company  (other  than the Series C  Preferred
         Stock) in shares of its Common Stock,  the Conversion Rate in effect at
         the  opening of business  on the day  following  the date fixed for the
         determination  of  stockholders  entitled to receive  such  dividend or
         other  distribution shall be increased by dividing such Conversion Rate
         by a fraction of which the  numerator  shall be the number of shares of
         Common Stock outstanding at the close of business on the date fixed for
         such  determination and the denominator shall be the sum of such number
         of shares and the total number of shares  constituting such dividend or
         other distribution, such increase to become effective immediately after
         the opening of business  on the day  following  the date fixed for such
         determination.  For the purposes of this  paragraph  (1), the number of
         shares of Common Stock at any time outstanding shall not include shares
         held in the treasury of the Company but shall include  shares  issuable
         in respect of scrip certificates  issued in lieu of fractions of shares
         of Common  Stock.  The  Company  will not pay any  dividend or make any
         distribution  on shares of Common  Stock  held in the  treasury  of the
         Company.

                            (2) In case at any time after the Closing Date,  the
         Company  shall  issue  rights or  warrants to all holders of its Common
         Stock (not being  available  on an  equivalent  basis to holders of the
         Debentures upon conversion) entitling them to subscribe for or purchase
         shares of  Common  Stock at a price  per  share  less than the  current
         market price per share (determined as provided in paragraph (8) of this
         Section   15.4)  of  the  Common  Stock  on  the  date  fixed  for  the
         determination  of  stockholders  entitled  to  receive  such  rights or
         warrants,  the Conversion  Rate in effect at the opening of business on
         the day  following  the  date  fixed  for such  determination  shall be
         increased by dividing such  Conversion  Rate by a fraction of which the
         numerator shall be the number of shares of Common Stock  outstanding at
         the close of business on the date 

                                      -46-

<PAGE>


         fixed for such  determination plus the number of shares of Common Stock
         which the aggregate of the offering price of the total number of shares
         of Common Stock so offered for  subscription or purchase would purchase
         at such current market price and the denominator shall be the number of
         shares of Common Stock outstanding at the close of business on the date
         fixed for such  determination plus the number of shares of Common Stock
         so offered  for  subscription  or  purchase,  such  increase  to become
         effective  immediately  after  the  opening  of  business  on  the  day
         following  the date  fixed for such  determination.  However,  upon the
         expiration  of any  right or  warrant  to  purchase  Common  Stock  the
         issuance of which  resulted in an  adjustment  in the  Conversion  Rate
         pursuant to this  subsection  (2),  if any such right or warrant  shall
         expire and shall not have been  exercised,  the  Conversion  Rate shall
         immediately   upon  such   expiration  be   recomputed   and  effective
         immediately  upon such  expiration  be  increased to the price which it
         would have been (but reflecting any other adjustments in the Conversion
         Rate made  pursuant to the  provisions  of this  Section 15.4 after the
         issuance  of  such  rights  or  warrants)  had  the  adjustment  of the
         Conversion  Rate made upon the issuance of such rights or warrants been
         made on the basis of offering for  subscription  or purchase  only that
         number of shares of Common Stock  actually  purchased upon the exercise
         of such rights or warrants actually exercised. For the purposes of this
         paragraph  (2),  the  number  of  shares  of  Common  Stock at any time
         outstanding  shall  not  include  shares  held in the  treasury  of the
         Company  but  will  include   shares   issuable  in  respect  of  scrip
         certificates issued in lieu of fractions of shares of Common Stock. The
         Company  will not issue any rights or  warrants in respect of shares of
         Common Stock held in the treasury of the Company.

                            (3) In case at any  time  after  the  Closing  Date,
         outstanding  shares of Common Stock shall be subdivided  into a greater
         number of shares of Common Stock,  the Conversion Rate in effect at the
         opening  of  business  on the day  following  the day upon  which  such
         subdivision  becomes effective shall be proportionately  increased and,
         conversely,  in case at any time  after  the date  hereof,  outstanding
         shares of Common Stock shall each be combined into a smaller  number of
         shares of Common Stock, the Conversion Rate in effect at the opening of
         business  on the day  following  the day upon  which  such  combination
         becomes effective shall be  proportionately  reduced,  such increase or
         reduction,  as the case may be, to become effective  immediately  after
         the opening of business  on the day  following  the day upon which such
         subdivision or combination becomes effective.

                            (4) In case at any time after the Closing Date,  the
         Company shall,  by dividend or otherwise,  distribute to all holders of
         its Common Stock  evidences of its  indebtedness  or assets  (including
         stock or other  securities  of the  Company  or any other  issuer,  but
         excluding  any rights or warrants  referred to in paragraph (2) of this
         Section 15.4, any dividend or distribution paid exclusively in cash and
         any  dividend  or  distribution  referred to in  paragraph  (1) of this
         Section 15.4),  the Conversion  Rate shall be adjusted so that the same
         shall equal the rate  determined  by dividing  the  Conversion  Rate in
         effect immediately prior to the close of business on the date fixed for
         the determination of stockholders entitled to receive such distribution
         by a fraction of which the numerator  shall be the current market price
         per share  (determined  as provided in  paragraph  (8) of this  Section
         15.4) of the Common Stock on the date fixed for such determination less
         the then fair market value (each  reference  to "fair market  value" in
         this Section 15.4 shall mean the fair market value as determined by the
         Board of  

                                      -47-

<PAGE>


         Directors of the Company in good faith,  whose  determination  shall be
         described in a Board Resolution,  a copy of which shall be delivered to
         each holder of  Debentures  within ten (10) days of the adoption of the
         resolution)  of the portion of the assets or evidences of  indebtedness
         so  distributed  applicable  to one (1) share of  Common  Stock and the
         denominator  shall be such current market price per share of the Common
         Stock,  such adjustment to become  effective  immediately  prior to the
         opening  of  business  on the day  following  the  date  fixed  for the
         determination of stockholders entitled to receive such distribution.

                            (5) In case at any time after the  Closing  Date (A)
         the Company shall, by dividend or otherwise,  distribute to all holders
         of its Common Stock cash (excluding any cash that is distributed upon a
         merger or  consolidation to which Section 15.13 applies or as part of a
         distribution  referred to in paragraph  (4) of this  Section  15.4) and
         (B)(I) the total of (x) the aggregate amount of such cash distribution,
         (y) the aggregate  amount of any other  distributions to all holders of
         its Common Stock made exclusively in cash within the twelve (12) months
         preceding  the date of payment of such  distribution  and in respect of
         which no adjustment  pursuant to this paragraph (5) or paragraph (6) of
         this Section 15.4 has been made and (z) the  aggregate of any cash plus
         the fair market value of other consideration  payable in respect of any
         tender offers by the Company or any of its  Subsidiaries for all or any
         portion of the Common  Stock  concluded  within the twelve  (12) months
         preceding  the date of payment of such  distribution  and in respect of
         which no adjustment  pursuant to this paragraph (5) or paragraph (6) of
         this Section 15.4 has been made,  exceeds (II) ten percent (10%) of the
         product of the current  market price per share  (determined as provided
         in paragraph  (8) of this Section 15.4) of the Common Stock on the date
         for the  determination of holders of shares of Common Stock entitled to
         receive  such  distribution  times the number of shares of Common Stock
         outstanding  on such date,  then,  and in each such  case,  immediately
         after  the  close  of  business  on such  date for  determination,  the
         Conversion  Rate shall be  increased  so that the same shall  equal the
         rate determined by dividing the Conversion  Rate in effect  immediately
         prior to the close of business on the date fixed for  determination  of
         the  stockholders  entitled to receive such  distribution by a fraction
         (i) the numerator of which shall be equal to such current  market price
         per share on the date fixed for such determination less an amount equal
         to the quotient of (X) the sum of (I) the total of the amounts referred
         to in subclauses  (B)(I)(x) and (y) of this  paragraph (5) and (II) the
         aggregate  of  the  excess  of  the  amount  referred  to in  subclause
         (B)(I)(z)  of this  paragraph  (5) for each tender offer so referred to
         over the aggregate  current  market price of the shares of Common Stock
         purchased  in  such  tender  offer  as  of  the  Expiration   Time  (as
         hereinafter defined) for such tender offer divided by (Y) the number of
         shares of Common Stock  outstanding on such date for  determination and
         (ii) the  denominator  of which shall be equal to such  current  market
         price per share on such date for determination.

                            (6) In case at any time after the Closing Date (A) a
         tender  offer  made by the  Company  or any  Subsidiary  for all or any
         portion of the Common  Stock  shall  

                                      -48-

<PAGE>


         expire  and  (B)(I)  the  total  of (x) the  fair  market  value of the
         aggregate  consideration  required  to be paid  pursuant to such tender
         offer (as amended upon the expiration  thereof) to stockholders  (based
         on the  acceptance  (up to any  maximum  specified  in the terms of the
         tender  offer)  of  Purchased  Shares  (as  defined  below)),  (y)  the
         aggregate of the cash plus the fair market value,  as of the expiration
         of such tender offer, of consideration  payable in respect of any other
         tender offer,  by the Company or any  Subsidiary for all or any portion
         of the Common Stock  expiring  within the twelve (12) months  preceding
         the  expiration  of such  tender  offer  and in  respect  of  which  no
         adjustment  pursuant to this  paragraph  (6) or  paragraph  (5) of this
         Section  15.4  has  been  made  and (z)  the  aggregate  amount  of any
         distributions  to  all  holders  of the  Company's  Common  Stock  made
         exclusively in cash within twelve (12) months  preceding the expiration
         of such tender offer and in respect of which no adjustment  pursuant to
         this paragraph (6) or paragraph (5) of this Section 15.4 has been made,
         exceeds  (II) ten percent  (10%) of the  product of the current  market
         price  per  share  of the  Common  Stock  (determined  as  provided  in
         paragraph  (8) of this Section  15.4) on the date of the last time (the
         "Expiration Time") tenders could have been made pursuant to such tender
         offer (as it may be amended) times the number of shares of Common Stock
         outstanding  (including any tendered  shares) on the  Expiration  Time,
         then,  and in each  such  case,  immediately  prior to the  opening  of
         business  on the  day  after  the  date  of the  Expiration  Time,  the
         Conversion  Rate shall be  adjusted  so that the same  shall  equal the
         price determined by dividing the Conversion Rate  immediately  prior to
         the close of business on the date of the Expiration  Time by a fraction
         (i) the  numerator  of which  shall be equal to (a) the  product of (I)
         such current market price per share on the date of the Expiration  Time
         and (II) the number of shares of Common  Stock  outstanding  (including
         any tendered  shares) as of the  Expiration  Time less (b) the total of
         the amounts  referred to in Clause  (B)(I) of this  paragraph  (6), and
         (ii) the denominator of which shall be equal to the product of (a) such
         current market price per share on the date of the  Expiration  Time and
         (b) the number of shares of Common  Stock  outstanding  (including  any
         tendered  shares)  as of the  Expiration  Time  less the  number of all
         shares  validly  tendered and not withdrawn as of the  Expiration  Time
         (the shares deemed so accepted up to any such maximum,  being  referred
         to as the "Purchased Shares").

                            (7)  The   reclassification  of  Common  Stock  into
         securities  other than Common  Stock  (other than any  reclassification
         upon a consolidation or merger to which Section 15.13 applies) shall be
         deemed to involve  (a) a  distribution  of such  securities  other than
         Common Stock to all holders of Common Stock (and the effective  date of
         such  reclassification  shall be deemed  to be "the date  fixed for the
         determination  of stockholders  entitled to receive such  distribution"
         and "the date  fixed for such  determination"  within  the  meaning  of
         paragraph  (4)  of  this  Section  15.4),  and  (b)  a  subdivision  or
         combination,  as the case may be,  of the  number  of  shares of Common
         Stock outstanding  immediately prior to such  reclassification into the
         number of shares of Common  Stock  outstanding  immediately  thereafter
         (and the effective date of such reclassification  shall be deemed to be
         "the day upon which such  subdivision  becomes  effective"  or "the day
         upon which such combination becomes effective", as the case may 

                                      -49-

<PAGE>


         be, and "the day upon which such  subdivision  or  combination  becomes
         effective" within the meaning of paragraph (3) of this Section 15.4).

                            (8)  For  the  purpose  of  any  computation   under
         paragraph (2), (4), (5) or (6) of this Section 15.4, the current market
         price per share of Common Stock on any date shall be  calculated by the
         Company and be deemed to be the average of the daily  Closing Price per
         share of Common Stock for the five (5) consecutive Trading Days before,
         and ending not later than,  the earlier of (i) the day in question  and
         (ii) the day  before  the "ex" date with  respect  to the  issuance  or
         distribution   requiring  such   computation.   For  purposes  of  this
         paragraph, the term "'ex' date", when used with respect to any issuance
         or distribution,  means the first date on which the Common Stock trades
         regular way on the applicable  securities exchange or in the applicable
         securities  market  without  the  right to  receive  such  issuance  or
         distribution.

                            (9) The  Company  may  make  such  increases  in the
         Conversion  Rate,  for  the  remaining  term of the  Debentures  or any
         shorter  term, in addition to those  required by  paragraphs  (1), (2),
         (3),  (4),  (5) and (6) of this  Section  15.4,  as it  considers to be
         advisable  in order to avoid or diminish  any income tax to any holders
         of shares of Common Stock  resulting from any dividend or  distribution
         of stock or issuance of rights or warrants to purchase or subscribe for
         stock or from any event  treated as such for income tax purposes or for
         any other reasons.

                  15.5.  Effect on Conversion Price of Certain Events.  In order
to prevent  dilution of the conversion  rights granted under this Section 15, in
addition to the  adjustments  provided for in Section 15.4, the Conversion  Rate
shall be subject to  adjustment  from time to time pursuant to this Section 15.5
as follows;  provided,  however,  that no  adjustments  shall be made under this
Section  15.5 with  respect to any  issuance of  securities  or other event that
requires an adjustment of the Conversion Rate under Section 15.4.

                            (1) If and whenever on or after the Closing Date the
         Company  issues or sells,  or in  accordance  with this Section 15.5 is
         deemed to have issued or sold, other than in an Excluded Issuance,  any
         share of Common  Stock  for a  consideration  per  share  less than the
         Trigger  Price in effect  immediately  prior to such time (a  "Dilutive
         Event"),  then  forthwith upon such issue or sale in the Dilutive Event
         the Conversion  Rate shall be increased by dividing the Conversion Rate
         in effect  immediately  before the  Dilutive  Event by a fraction,  the
         numerator  of which is the  number of shares of Common  Stock  that are
         Outstanding on an  As-Converted  Basis (as defined  below)  immediately
         before the  Dilutive  Event  plus the number of shares of Common  Stock
         that  could  be  purchased  at the  Trigger  Price  at the  time of the
         Dilutive Event for the aggregate consideration paid or payable upon the
         sale or  issuance  of  Common  Stock  in the  Dilutive  Event,  and the
         denominator  of which is the number of shares of Common  Stock that are
         Outstanding on an As-Converted  

                                      -50-

<PAGE>

         Basis  immediately  before the Dilutive Event plus the number of shares
         that are  acquired or to be  acquired  upon the sale or issuance of the
         Common Stock in the Dilutive Event. For purposes of this paragraph (1),
         "Outstanding on an As-Converted  Basis immediately  before the Dilutive
         Event"  means the sum of (i) all Common  Stock  issued and  outstanding
         immediately  before  the  Dilutive  Event  plus (ii) all  Common  Stock
         issuable  upon the  exercise of Options or  conversion  of  Convertible
         Securities  outstanding  immediately  before the Dilutive  Event (other
         than the Debentures).

                            (2) If after the  Closing  Date the  Company  in any
         manner  grants any Options and the price per share for which  shares of
         Common Stock are issuable  upon the exercise of any such Option is less
         than the Trigger Price in effect  immediately  prior to the time of the
         granting  of such  Option,  then such  shares of Common  Stock shall be
         deemed to have been  issued and sold by the  Company at the time of the
         granting of such  Options  for such price per share and the  Conversion
         Rate shall be adjusted in accordance with paragraph (1) of this Section
         15.5. For purposes of this  paragraph,  the "price per share" for which
         shares of Common  Stock are  issuable  upon the  exercise of any Option
         shall be  equal to the sum of the  amounts  of  consideration  (if any)
         received or  receivable  by the Company  with respect to such shares of
         Common Stock upon the  granting of the Option and upon  exercise of the
         Option. No further adjustment of the Conversion Rate shall be made upon
         the  actual  issue  of such  Common  Stock  upon the  exercise  of such
         Options.

                            (3) If after the  Closing  Date the  Company  in any
         manner issues or sells any Convertible Security (or Options to purchase
         any Convertible  Security) and the price per share for shares of Common
         Stock that are issuable  upon  conversion  or exchange  thereof is less
         than the Trigger Price in effect  immediately prior to the time of such
         issue or sale (or the  granting  of such  Option),  then such shares of
         Common  Stock  shall be  deemed  to have  been  issued  and sold by the
         Company  at the  time of the  issuance  or  sale  of  such  Convertible
         Securities  (or the  granting of such  Option) for such price per share
         and the Conversion Price shall be adjusted in accordance with paragraph
         (1) of this Section 15.5.  For the purposes of this  paragraph (3), the
         "price per share" for which shares of Common  Stock are  issuable  upon
         conversion or exchange of any Convertible  Security (or exercise of any
         Option  therefor)  shall  be  equal  to  the  sum  of  the  amounts  of
         consideration  (if any)  received or receivable by the Company upon the
         issuance  of the  Convertible  Security  (or such  Option) and upon the
         conversion  or exchange of such  Convertible  Security  (or exercise of
         such Option).  No further  adjustment of the Conversion  Price shall be
         made upon the actual  issue of such  Common  Stock upon  conversion  or
         exchange of any Convertible Security,  and if any such issue or sale of
         such  Convertible  Security  is made upon  exercise  of any Options for
         which  adjustments  of the  Conversion  Rate had been or are to be made
         pursuant to other provisions of this Section 15, no further  adjustment
         of the Conversion Rate shall be made by reason of such issue or sale.

                            (4) If after the  Closing  Date the  purchase  price
         provided  for in any  Option,  the  additional  consideration  (if any)
         payable  upon the issue,  conversion  or  exchange  of any  Convertible
         Security  (other  than  the  Debentures),  or the  rate  at  which  any
         Convertible Security (other than the Debentures) is convertible into or
         exchangeable  

                                      -51-

<PAGE>


         for Common Stock changes at any time,  any Conversion  Rate  previously
         adjusted  with respect to such Option or  Convertible  Security  (other
         than the  Debentures) and in effect at the time of such change shall be
         readjusted  to the  Conversion  Rate which would have been in effect at
         such  time had such  Option or  Convertible  Security  (other  than the
         Debentures)  originally  provided  for  such  changed  purchase  price,
         additional  consideration  or changed  conversion rate, as the case may
         be, at the time initially granted, issued or sold.

                            (5)  Upon  the  expiration  of  any  Option  or  the
         termination  of any  right  to  convert  or  exchange  any  Convertible
         Security (other than the Debentures),  after the Closing Date,  without
         the exercise of any such Option or right,  any Conversion  Rate then in
         effect  hereunder  shall be adjusted to the Conversion Rate which would
         have been in effect at the time of such  expiration or termination  had
         such  Option  or  Convertible   Security,  to  the  extent  outstanding
         immediately prior to such expiration or termination, never been issued.

                            (6) For the  purpose of this  Section  15.5,  if any
         Common  Stock,  Option  or  Convertible  Security  is issued or sold or
         deemed to have been issued or sold for cash, the consideration received
         therefor  shall be  deemed to be the  amount  received  by the  Company
         therefor.  In case any Common Stock, Options or Convertible  Securities
         are issued or sold for a  consideration  other than cash, the amount of
         the consideration  other than cash received by the Company shall be the
         fair  value of such  consideration,  except  where  such  consideration
         consists  of  securities,  in which  case the  amount of  consideration
         received by the  Company  shall be the Market  Price  thereof as of the
         date of receipt. If any Common Stock, Option or Convertible Security is
         issued to the owners of the non-  surviving  entity in connection  with
         any  merger in which the  Company  is the  surviving  corporation,  the
         amount of  consideration  therefor shall be deemed to be the fair value
         of such portion of the assets and business of the non-surviving  entity
         as is  attributable  to  such  Common  Stock,  Options  or  Convertible
         Securities,  as the case may be.  The fair  value of any  consideration
         other than cash and securities  shall be as determined in good faith by
         the Board of Directors of the Company.  For purposes of this  paragraph
         (6), the term  "Market  Price" of a security  means,  with respect to a
         specified  date,  the Closing Price of such  security,  averaged over a
         period of the twenty (20) consecutive Business Days prior to such date;
         provided  that if during this period such security is not listed on any
         securities exchange, quoted on the Nasdaq National Market, or quoted in
         the over-the-counter market, the Market Price will be the fair value of
         such  security  determined  by  agreement  between  the Company and the
         holders of a majority of the  Outstanding  Debentures.  If such parties
         are unable to reach agreement  within a reasonable  period of time, the
         fair  value of such  security  shall be  determined  by an  independent
         appraiser  experienced  in valuing such type of  consideration  jointly
         selected  by  the  Company  and  the  holders  of  a  majority  of  the
         Outstanding  Debentures.  The  determination of such appraiser shall be
         final and binding upon the  parties,  and the fees and expenses of such
         appraiser shall be borne by the Company.

  
                                      -52-

<PAGE>

                            (7) In case any Option is issued in connection  with
         the  issue  or  sale  of  other  securities  of the  Company,  together
         comprising  one  (1)  integrated   transaction  in  which  no  specific
         consideration is allocated to such Option by the parties  thereto,  the
         Option shall be deemed to have been issued for a consideration of $.0l.

                  15.6.  De  Minimis  Adjustments.   Notwithstanding  any  other
provisions  of this  Section 15, the  Company  shall not be required to make any
adjustment  of the  Conversion  Rate unless  such  adjustment  would  require an
increase or decrease of at least one percent (1%) in the Conversion Rate as then
in effect.  Any lesser  adjustment shall be carried forward and shall be made no
later than the time of, and together with, the next subsequent adjustment which,
together with any adjustment or adjustments so carried forward,  shall amount to
an increase or decrease of at least one percent (1%) of the  Conversion  Rate as
then in effect.

                  15.7.  Notice of Adjustments of Conversion Rate.  Whenever the
Conversion  Rate is adjusted as provided in Section  15.4 or Section  15.5,  the
Company shall promptly (and, in any event,  not later than the fifteenth  (15th)
day following the occurrence of the event requiring such adjustment) compute the
adjusted  Conversion Rate in accordance with this Section 15 and shall prepare a
report  setting  forth  such  adjustment  and  showing  in detail  the method of
calculation  and the facts upon  which such  adjustment  is based,  including  a
statement of (a) the consideration received or to be received by the Company for
any  additional  shares  of Common  Stock  issued or sold or deemed to have been
issued,  (b) the number of shares of Common  Stock  outstanding  or deemed to be
outstanding,  and (c) the Conversion  Rate in effect  immediately  prior to such
issue or sale and as adjusted on account  therefor  and, upon the request of any
holder of the Debentures, shall cause certified public accountants of recognized
national standing (which may be the regular auditors of the Company) selected by
the Company to verify such computation and report, if not previously verified at
the request of any holder.  The Company will promptly  (and,  in any event,  not
later than such  fifteenth  (15th)  day)  furnish a copy of each such report and
such  verification  to the holder of any Debenture,  and will,  upon the written
request at any reasonable  time of the holder of any Debenture,  furnish to such
holder a like report setting forth the Conversion Rate at the time in effect and
showing how it was  calculated.  The  Company  will also keep copies of all such
reports and such  verifications at its principal office, and will cause the same
to be available for  inspection at such office during normal  business  hours by
the  holder of any  Debenture  or any  prospective  purchaser  of any  Debenture
designated by the holder of such Debenture.

                  15.8.     Notice of Certain Corporate Action.   In case:

                            (1) the  Company  shall  declare a dividend  (or any
         other  distribution) on its Common Stock payable otherwise than in cash
         out of its earned surplus; or

                            (2) the Company shall  authorize the granting to all
         holders of its Common Stock of rights or warrants to  subscribe  for or
         purchase any shares of Capital Stock or of any other rights; or


                                      -53-

<PAGE>


                            (3) (a) of any  reclassification of the Common Stock
         of the Company,  or (b) of any consolidation,  merger or share exchange
         to  which  the  Company  is a  party  and  for  which  approval  of any
         stockholders of the Company is required,  or (c) of any tender offer by
         the  Company  or any  Subsidiary  for all or any  portion of the Common
         Stock,  or (d) of the  conveyance,  transfer,  sale or  lease of all or
         substantially all of the assets of the Company; or

                            (4) of the  voluntary  or  involuntary  dissolution,
         liquidation or winding up of the Company;

then the  Company,  ten (10)  Business  Days  prior  to the  applicable  record,
expiration or effective date hereinafter specified, shall give to each holder of
Debentures  a notice  stating  (x) the date on which a record is to be taken for
the purpose of such dividend, distribution,  rights or warrants, or, if a record
is not to be taken,  the effective  date as of which the holders of Common Stock
of record to be entitled to such dividend, distribution,  rights or warrants are
to be  determined,  (y) the date on which the right to make  tenders  under such
tender  offer   expires  or  (z)  the  date  on  which  such   reclassification,
consolidation,  merger,  share  exchange,  conveyance,  transfer,  sale,  lease,
dissolution,  liquidation or winding up is expected to become effective, and the
date as of which it is expected  that holders of Common Stock of record shall be
entitled to exchange their shares of Common Stock for securities,  cash or other
property deliverable upon such  reclassification,  consolidation,  merger, share
exchange, conveyance, transfer, sale, lease, dissolution, liquidation or winding
up.

                  15.9.  Company to Reserve  Common Stock.  The Company shall at
all times reserve and keep available,  free from preemptive  rights,  out of its
authorized  but  unissued  Common  Stock,  for  the  purpose  of  effecting  the
conversion of  Debentures,  the full number of  Conversion  Shares then issuable
upon the conversion of all outstanding Debentures.

                  15.10. Taxes on Conversions.  The Company will pay any and all
taxes (other than taxes on income),  liens and other charges that may be payable
in respect of the issue or delivery of Conversion Shares pursuant hereto.

                  15.11.  Agreements  as to Common Stock;  Listing.  The Company
agrees that all Conversion  Shares,  upon delivery thereof,  will have been duly
authorized and validly issued and will be fully paid and  nonassessable  with no
liability on the part of holders thereof.  The Company will take all such action
as may be necessary to insure that such Conversion  Shares may be issued without
violation of any applicable law or regulation, or of any agreement,  contract or
understanding applicable to the Company or its assets, or of any requirements of
any securities  exchange or automated  quotation system upon which any shares of
Common Stock may be listed or quoted.

                            No class of Capital Stock (other than any class that
has a preference  in respect of dividends or of amounts  payable in the event of
any  voluntary  or  involuntary  liquidation,  dissolution  or winding up of the
Company or that is subject  to  redemption  by the  



                                      -54-

<PAGE>

Company)  shall have voting  rights that are  proportionately  greater per share
than those of any class of  Capital  Stock  issuable  on any  conversion  of the
Debentures  pursuant hereto,  and all classes of which shares are so issuable on
any such conversion shall have voting rights.

                            15.12.  Cancellation  of Converted  Debentures.  All
Debentures  delivered for  conversion  shall be cancelled and no such  Debenture
shall thereafter be reissued.

                            15.13. Provision in Case of Consolidation, Merger or
Conveyance of Assets.

                            (a) In case at any time after the  Closing  Date the
Company shall be a party to any transaction  (including,  without limitation,  a
merger, consolidation,  sale of all or substantially all of the Company's assets
or  recapitalization  of the Common Stock) in which the  previously  outstanding
Common Stock shall be changed into or exchanged for different  securities of the
Company, common stock or other securities of another corporation or interests in
a noncorporate  entity or other property  (including cash) or any combination of
any of the foregoing (each such transaction being  hereinafter  referred to as a
"Reorganization Transaction," the date of the consummation of the Reorganization
Transaction  being  hereinafter  referred  to as the  "Consummation  Date,"  the
Company (in the case of a  recapitalization  of the Common  Stock) or such other
corporation or entity (in each other case) being hereinafter  referred to as the
"Acquiring  Company," and the common stock (or equivalent  equity  interests) of
the Acquiring  Company being hereinafter  referred to as the "Acquirer's  Common
Stock"),  then, subject to the alternate rights of each holder of Debentures set
forth in Section 15.13(b), if then applicable as a condition to the consummation
of the Reorganization Transaction,  lawful and adequate provisions shall be made
so that, upon the basis and the terms and in the manner provided in this Section
15, each holder of a Debenture,  upon the  conversion  thereof at any time after
the  consummation  of the  Reorganization  Transaction,  shall  be  entitled  to
receive,  in lieu of the Stock or Other Securities issuable upon such conversion
prior to such consummation, the stock and other securities, cash and property to
which  such  holder  would  have  been  entitled  upon the  consummation  of the
Reorganization   Transaction   if  such  holder  had  converted  such  Debenture
immediately   prior  thereto   (subject  to  adjustments   from  and  after  the
Consummation Date as nearly  equivalent as possible to the adjustments  provided
for in this Section 15 including, without limitation, this Section 15.13).

                            (b) In  addition  to the  rights  granted in Section
15.13(a),  at the  election  of any holder of any  Debenture  pursuant to notice
given to the  Company on or before the later of (x) the day on which the holders
of the Common Stock of the Company approve the Reorganization  Transaction,  and
(y) the  sixtieth day (60th)  following  the date of delivery or mailing to such
holder of the last proxy  statement  relating to the vote on the  Reorganization
Transaction by the holders of the Common Stock of the Company, such holder shall
have the right to elect to receive on the Consummation  Date and, as a condition
precedent   to  the   Reorganization   Transaction,   in  full  payment  and  in
consideration  for the surrender of such  Debenture,  a cash amount equal to the
current market value (as determined in accordance  with Section  15.4(8)) of the
number of shares of Stock  (or  Other  Securities)  to which the  holder of such
Debenture  would have been  entitled had such holder  converted  such  Debenture
immediately  

                                      -55-

<PAGE>

prior to the consummation of the Reorganization Transaction;  provided, however,
that the provisions of this Section 15.13(b) shall not apply prior to the Senior
Notes Reduction Date.


                            (c) The Company will not enter into or be a party to
any Reorganization Transaction following the consummation of which any holder of
Debentures would be entitled in accordance with the foregoing provisions of this
Section  15.13 to receive  Acquirer's  Common Stock or other  securities  of the
Acquiring  Company  upon  conversion  of  such  Debentures  unless,  immediately
following  the  consummation  thereof  on  the  Consummation  Date,  all  of the
following requirements are fulfilled as to the Acquiring Company:

                            (A) its common stock is listed on the New York Stock
                  Exchange or the American  Stock  Exchange or is authorized for
                  quotation on the Nasdaq  National  Market as a national market
                  security  and  such  common   stock   continues  to  meet  the
                  requirements  for such listing or  quotation,  as the case may
                  be, and

                            (B)  it  is  required  to  file   reports  with  the
                  Commission  pursuant  to Section  13 or 15(d) of the  Exchange
                  Act.

                            (d)  Notwithstanding   anything  contained  in  this
Agreement  to the  contrary,  the  Company  will not effect  any  Reorganization
Transaction  unless,  prior to the  consummation  thereof,  each  corporation or
entity  (other  than the  Company)  which may be  required to deliver any stock,
securities,  cash or property  upon the  conversion of any Debenture as provided
herein  shall  assume,  by written  instrument  delivered  to the holder of such
Debenture,  the  obligation  to deliver  to such  holder  such  shares of stock,
securities,  cash or property as, in accordance  with the foregoing  provisions,
such holder may be entitled to receive,  and such  corporation  or entity  shall
have  similarly  delivered  to such  holder  an  opinion  of  counsel  for  such
corporation or entity,  which counsel shall be reasonably  satisfactory  to such
holder,  stating that such Debenture shall thereafter continue in full force and
effect  and  the  terms  hereof  (including,  without  limitation,  all  of  the
provisions  of this Section 15) shall be  applicable  to the stock,  securities,
cash or  property  which such  corporation  or entity may be required to deliver
upon the  exercise  hereof.  Nothing in this  Section  15.13  shall be deemed to
authorize the Company to enter into any transaction  not otherwise  permitted by
either Section 12.6 or Section 13.1, as then applicable.

                  15.14.  Other Dilutive  Events.  In case any event shall occur
which is  substantially  similar to the events described in the other provisions
of this Section 15, but as to which substantially  similar event such provisions
of this  Section 15 are not  applicable  and in  respect of which  substantially
similar  event the failure to make any  adjustment  would not in the  reasonable
opinion  of  any  holder  of a  Debenture  or the  Company  fairly  protect  the
conversion  rights  granted by this Section 15 in accordance  with the essential
intent and principles hereof,  then, in each such case, upon the written request
of such  holder  or on its own  motion,  the  Company  shall  appoint  a firm of
independent  certified public accountants of recognized national standing (which
may be the regular auditors of the Company) which shall give their opinion as to
the  adjustment,  if any, on a basis  consistent  with the essential  intent and
principles  established  

                                      -56-

<PAGE>

in this Section 15,  necessary to preserve,  without  dilution,  such conversion
rights.  Upon receipt of such  opinion,  the Company will  promptly  mail a copy
thereof  to the  holder of each  Debenture  and shall  make the  adjustments  or
increases described therein.

                  15.15. Continuing Obligation of the Company. The Company will,
at the time of conversion of any Debenture in full or in part,  upon the request
of any holder  thereof,  acknowledge  in writing its  continuing  obligation  to
afford  such  holder any rights  (including,  without  limitation,  any right of
registration of the Conversion Shares) to which such holder shall continue to be
entitled  after  such  conversion  in  accordance  with the  provisions  of this
Agreement;  provided,  however,  that if any such holder  shall fail to make any
such  request,  such failure shall not affect the  continuing  obligation of the
Company to afford to such holder all such rights.

         16.      Registration, Transfer and Substitution of Debentures.
                  -----------------------------------------------------
                  16.1. Debenture Register;  Ownership of Registered Debentures.
The Company  will keep at its  principal  office a register in which the Company
will  provide  for  the  registration  of  Debentures  and the  registration  of
transfers  of  Debentures.  The  Company  may treat the Person in whose name any
Debenture is registered on such register as the owner and holder thereof for the
purpose of receiving  payment of the  principal of and the premium,  if any, and
interest  on such  Debenture  and for all other  purposes,  whether  or not such
Debenture shall be overdue,  and the Company shall not be affected by any notice
to the  contrary.  The  Company  may treat the Person in whose name any Stock is
registered in the stock transfer  records of the Company as the owner and holder
thereof for the purpose of receiving dividends and other  distributions  thereon
and for all other purposes,  and the Company shall not be affected by any notice
to the contrary.

                  16.2.  Transfer and Exchange of Debentures.  Upon surrender of
any Debenture for registration of transfer or for exchange to the Company at its
principal  office with evidence  that all  applicable  transfer  taxes have been
paid, the Company at its expense will execute and deliver in exchange therefor a
new Debenture or Debentures in  denominations  of at least $100,000  (except one
(1) Debenture may be issued in a lesser principal amount if the unpaid principal
amount of the surrendered Debenture is not evenly divisible by, or is less than,
$100,000), as requested by the holder or transferee,  which aggregate the unpaid
principal amount of such surrendered Debenture. Each such new Debenture shall be
registered  in the  name of such  Person,  or its  nominee,  as such  holder  or
transferee may request,  dated so that there will be no loss of interest on such
surrendered Debenture and otherwise of like tenor.

                  16.3.  Replacement  of  Debentures.  Upon  receipt of evidence
reasonably  satisfactory  to the  Company  of the loss,  theft,  destruction  or
mutilation  of any  Debenture  and,  in the  case of any  such  loss,  theft  or
destruction,  upon delivery of an indemnity bond in such  reasonable  amount and
form as the Company may determine  (or, in the case of any Debenture held by you
or another  holder of  Debentures,  of an indemnity  agreement  from you or such
other holder  reasonably  satisfactory  to the Company),  or, in the case of any
such  mutilation,  upon the 

                                      -57-

<PAGE>


surrender of such  Debenture  for  cancellation  to the Company at its principal
office, the Company at its expense will execute and deliver,  in lieu thereof, a
new Debenture of like tenor,  dated so that there will be no loss of interest on
such lost, stolen,  destroyed or mutilated  Debenture.  Any Debenture in lieu of
which any such new  Debenture  has been so executed and delivered by the Company
shall not be deemed  to be an  outstanding  Debenture  for any  purpose  of this
Agreement.

         17.      Payment.
                  -------
                  17.1. Form of Payment.  Payments of interest  becoming due and
payable on any  Debenture  shall be made by issuing to the holder  thereof fully
paid and  nonassessable  shares  of  Common  Stock in an  amount  determined  by
multiplying  the principal  amount of the  Debenture by eight and  three-fourths
percent  (8.75%) per annum  (computed  on the basis of a 360-day  year of twelve
(12)  30-day  months)  and  dividing  the  resulting  product by the  Applicable
Divisor.  All amounts of principal due on any Debenture and any premium (whether
at Stated  Maturity,  upon  acceleration or otherwise)  shall be paid in cash in
U.S. dollars in immediately available funds to the account or accounts specified
by the holder of the Debenture.

                  17.2.     Place of Payment.
                            -----------------

                            (a) Payments of interest becoming due and payable on
the  Debentures  shall be made by delivering a certificate or  certificates  for
shares of Common  Stock in such  denomination  as the holder may  request at the
address  specified  by such holder to the Company  from time to time,  by notice
pursuant to Section 23 hereof.

                            (b) Except as  otherwise  provided in Section  17.3,
payments  of  principal  or  premium,  if any,  becoming  due and payable on the
Debentures  shall be made at the  principal  office  of the  Company,  provided,
however,  that if at any time the Company does not maintain its principal office
in Rockville,  Maryland,  the Company,  by written  notice to each holder of any
Debentures, shall designate the principal office of any bank or trust company in
New York County,  State of New York, as the office or agency where such payments
shall be made.

                  17.3.  Home  Office  Payment.  So long as you or your  nominee
shall be the holder of any Debenture,  and notwithstanding anything contained in
Section 17.2 or in such Debenture to the contrary, the Company will pay all sums
becoming due on such Debenture for principal,  or premium, if any, in the manner
and at the address  specified for such purpose in Schedule I attached hereto, or
in such other  manner  and at such other  address as you shall have from time to
time  specified  to the  Company  in  writing  for  such  purpose,  without  the
presentation  or  surrender  of such  Debenture  or the  making of any  notation
thereon,  except that any Debenture so paid or redeemed or  repurchased  in full
shall, following such payment,  redemption or repurchase,  be surrendered to the
Company at its  principal  office or at the place of payment  maintained  by the
Company pursuant to Section 17.2 for cancellation.  The Company agrees to afford
the  benefits of this Section 17.3 to any holder which is the direct or indirect
transferee of any Debenture purchased by you under this Agreement.


                                      -58-

<PAGE>



         18.      Events of Default; Acceleration.

                  18.1. Nature of Events and Acceleration of Debentures. Subject
to Section  18.5,  if any of the following  events  ("Events of Default")  shall
occur and be continuing for any reason  whatsoever  (and whether such occurrence
shall be voluntary or  involuntary  or come about or be effected by operation of
law or otherwise):

                            (a) any payment of principal or premium,  if any, on
         any  Debenture  is not made  when and as such  payment  becomes  due at
         maturity, upon acceleration, redemption or repurchase, or otherwise;

                            (b) any payment of interest on any  Debenture is not
         made when and as such payment becomes due and payable, and such default
         continues for a period of fifteen (15) days;

                            (c)  the   Company   fails   to   comply   with  the
         requirements for consolidation, merger or conveyance, transfer or lease
         of all or substantially  all of the Company's  assets,  as set forth in
         either Section 12.6 or Section 13.1, as then applicable;

                            (d) the Company  fails to comply with or perform any
         of the then-applicable  covenants or other agreements set forth in this
         Agreement or the Debentures  (other than a default  specified in clause
         (a), (b) or (c) above) or any other  provision of this  Agreement,  and
         such  failure  continues  for a period  of thirty  (30) days  after the
         earlier of (1) the day on which a  Responsible  Officer of the  Company
         first obtains knowledge of such failure, or of the events or conditions
         that  constitute  such failure or (2) the day on which  written  notice
         thereof is given to the Company by the holder of any Debenture;

                            (e) any warranty or  representation  by or on behalf
         of the  Company  contained  in  this  Agreement  or in  any  instrument
         furnished in  compliance  with this  Agreement is false or incorrect in
         any material respect on the date as of which made;

                            (f) any "Event of Default" under (and as defined in)
         either of the Senior Indentures shall have occurred and be continuing;

                            (g) there occurs with respect to any issue or issues
         of Indebtedness of the Company or any Significant  Subsidiary having an
         outstanding principal amount of $2 million or more in the aggregate for
         all such issues of all such  Persons,  whether  such  Indebtedness  now
         exists or shall hereafter be created,  (I) an event of default that has
         caused the holder  thereof to declare such  Indebtedness  to be due and
         payable prior to its Stated Maturity and such Indebtedness has not been
         discharged  in full or such  

                                      -59-

<PAGE>

         acceleration has not been rescinded or annulled within thirty (30) days
         of such  acceleration  and/or  (II)  the  failure  to make a  principal
         payment  at the final (but not any  interim)  fixed  maturity  and such
         defaulted  payment shall not have been made,  waived or extended within
         thirty (30) days of such payment default;

                            (h) any final  judgment  or order  (not  covered  by
         insurance)  for the  payment  of money in excess of $2  million  in the
         aggregate  for all such  final  judgments  or orders  against  all such
         Persons  (treating any deductibles,  self-insurance or retention as not
         so covered)  shall be rendered  against the Company or any  Significant
         Subsidiary and shall not be paid or discharged,  and there shall be any
         period of sixty  (60)  consecutive  days  following  entry of the final
         judgment or order that causes the  aggregate  amount for all such final
         judgments or orders  outstanding and not paid or discharged against all
         such Persons to exceed $2 million during which a stay of enforcement of
         such  final  judgment  or  order,  by  reason  of a  pending  appeal or
         otherwise, shall not be in effect;

                            (i)   the   Company   or  any  of  its   Significant
         Subsidiaries  shall  commence a voluntary case under any chapter of the
         Federal Bankruptcy Code, or shall consent to (or fail to contest within
         ten (10) days) the  commencement  of an  involuntary  case  against the
         Company or any of its Subsidiaries under the Federal Bankruptcy Code;

                            (j) the Company or any Significant  Subsidiary shall
         institute proceedings for liquidation, rehabilitation,  readjustment or
         composition  (or for any  related  or  similar  purpose)  under any law
         (other  than the  Federal  Bankruptcy  Code)  relating  to  financially
         distressed  debtors,  their creditors or property,  or shall consent to
         (or fail to contest  within ten (10) days) the  institution of any such
         proceedings against the Company or any of its Subsidiaries;

                            (k)   the   Company   or  any  of  its   Significant
         Subsidiaries  shall be insolvent  (within the meaning of any applicable
         law), or shall be unable,  or shall admit in writing its inability,  to
         pay its debts  generally as they come due, or shall make an  assignment
         for the  benefit of  creditors  or enter into any  arrangement  for the
         adjustment or composition of debts or claims;

                            (l) a  court  or  other  governmental  authority  or
         agency  having  jurisdiction  in the  premises  shall enter a decree or
         order (i) for the  appointment  of a  receiver,  liquidator,  assignee,
         trustee or sequestrator  (or other similar  official) of the Company or
         any of its  Significant  Subsidiaries or of any part of the property of
         such Person,  or for the  winding-up or  liquidation  of the affairs of
         such  Person,  and such  decree  or order  shall  remain  in force  and
         undischarged  and  unstayed for a period of more than thirty (30) days,
         or (ii) for the  sequestration  or  attachment  of any  property of the
         Company   or  any  of  its   Significant   Subsidiaries   without   its
         unconditional   return  to  the  possession  of  such  Person,  or  its
         unconditional  release from such  sequestration  or attachment,  within
         thirty (30) days thereafter;


                                      -60-

<PAGE>



                            (m) a  court  having  jurisdiction  in the  premises
         shall  enter an order  for  relief  in an  involuntary  case  commenced
         against the Company or any of its  Significant  Subsidiaries  under the
         Federal   Bankruptcy  Code,  and  such  order  shall  remain  in  force
         undischarged and unstayed for a period of more than thirty (30) days;

                            (n) a  court  or  other  governmental  authority  or
         agency  having  jurisdiction  in the  premises  shall enter a decree or
         order approving or acknowledging as properly filed or commenced against
         the  Company  or any of its  Significant  Subsidiaries  a  petition  or
         proceedings   for   liquidation,   rehabilitation,    readjustment   or
         composition  (or for any  related  or  similar  purpose)  under any law
         (other  than the  Federal  Bankruptcy  Code)  relating  to  financially
         distressed debtors, their creditors or property, and any such decree or
         order shall remain in force and  undischarged and unstayed for a period
         of more than thirty (30) days; or

                            (o)   the   Company   or  any  of  its   Significant
         Subsidiaries  shall take  corporate  action for the purpose or with the
         effect  of  authorizing,  acknowledging  or  confirming  the  taking or
         existence of any action or condition specified in paragraph (i), (j) or
         (k) above;

then,  in the case of any such Event of Default  referred to in clause (i), (j),
(k), (1), (m) or (n) of this Section 18.1, automatically, or, in the case of any
other such Event of Default,  at the option of the holder or holders of not less
than twenty-five  percent (25%) in aggregate  principal amount of the Debentures
at the time  Outstanding,  exercised  by  written  notice  to the  Company,  the
Debentures,  together with the interest accrued thereon,  shall forthwith become
and be due and payable, without any other presentment, demand, protest or notice
of any kind, all of which are hereby expressly waived;  provided,  however, that
in the case of any  Event of  Default  specified  in  clause  (a) or (b) of this
Section  18.1,  such option may be exercised  by the holder of any  Debenture by
written notice to the Company and such Debenture, together with interest accrued
thereon, shall in such case forthwith become and be due and payable, without any
other  presentment,  demand,  protest  or notice  of any kind,  all of which are
hereby expressly waived.

                  18.2.  Default  Remedies.  If an Event of Default exists,  the
holder of any Debenture then outstanding may exercise any right, power or remedy
permitted  to it by law,  either  by suit in equity or by action at law or both,
whether for specific  performance of any covenant or agreement contained in this
Agreement or in aid of the exercise of any power granted in this  Agreement,  or
the holder of any Debenture may proceed to enforce  payment of such Debenture or
to enforce any other legal or equitable  right of the holder of such  Debenture.
No course of dealing on the part of any holder of any  Debenture or any delay or
failure on the part of any holder of any  Debenture  to exercise any right shall
operate as a waiver of such right or otherwise  prejudice such holder's,  or any
other holder's rights,  powers and remedies.  If an Event of Default exists, the
Company will pay to the holders of the Debentures,  to the extent not prohibited
by law,  such  further  amount  as shall  be  sufficient  to cover  the cost and
expenses of  collection  or other  proceedings,  including,  but not limited to,
reasonable attorneys' fees.


                                      -61-

<PAGE>



                  18.3. Notice of Default.  If any one (1) or more of the Events
of Default  specified in Section 18.1 above shall occur, or if the holder of any
Debenture  or of any other  evidence of  Indebtedness  of the Company  gives any
notice or takes any other action with respect to a claimed default,  the Company
will forthwith  give written  notice  thereof to all holders of Debentures  then
Outstanding  describing  the  notice or  action  and the  nature of the  claimed
default, including any Event of Default.

                  18.4.  Annulment of Acceleration  of Debentures.  If notice is
delivered  pursuant  to Section  18.1 by any holder or holders of the  requisite
principal amount of the Debentures,  then and in every such case, the holders of
at least fifty-one percent (51%) in aggregate principal amount of the Debentures
then Outstanding may, by written instrument filed with the Company,  rescind and
annul such declaration and the consequences thereof; provided,  however, that at
the time such declaration is annulled and rescinded:

                            (a) no judgment  or decree has been  entered for the
         payment of any monies due pursuant to the Debentures or this Agreement;

                            (b) all arrears of principal  and interest  upon all
         of the  Debentures  and all other sums payable under the Debentures and
         under this  Agreement  (including  costs and  expenses  of the  holders
         incurred in  connection  with such notice  under  Section  18.1 and the
         exercise of remedies  under Section 18.2,  but excluding any principal,
         interest or premium on the Debentures  which has become due and payable
         by reason of such notice under Section 18.1) shall have been duly paid;
         and

                            (c)  each  and  every  other  default  and  Event of
         Default shall have been waived pursuant to Section 22 or otherwise made
         good or cured;

and provided,  further, that no such rescission and annulment shall extend to or
affect any subsequent default or Event of Default or impair any right consequent
thereon.

         18.5.  Accelerations  and other Remedies  Limited Prior to Senior Notes
Reduction Date.  Notwithstanding  anything in Sections 18.1 through Section 18.4
to the  contrary,  prior to the  Senior  Notes  Reduction  Date no holder of any
Debenture  shall have the right to accelerate  any payments on such Debenture or
exercise any other remedies or rights against the Company,  any Guarantor or any
other  Subsidiary  of the Company  arising  from any Event of Default as defined
herein  except for (i) the Events of Default  specified in paragraph  (i),  (j),
(k),  (l), (m) or (n) of Section  18.1,  (ii) the Event of Default  specified in
paragraph (h) of Section 18.1,  provided that the applicable amount of any final
judgments or orders for the payment of money thereunder is at least $50 million,
or (iii) any Event of Default under  paragraph (f) or (g) of this Agreement that
results in the acceleration of payment with respect to Indebtedness  (other than
the Debentures) in the aggregate principal amount of at least $50 million.


                                      -62-

<PAGE>



         19.      Interpretation of Agreement and Debentures.


                  Acquired Indebtedness: means Indebtedness of a Person existing
at the time such Person becomes a Restricted Subsidiary or assumed in connection
with an  Asset  Acquisition  by a  Restricted  Subsidiary  and not  Incurred  in
connection  with,  or in  anticipation  of,  such Person  becoming a  Restricted
Subsidiary or such Asset Acquisition;  provided that Indebtedness of such Person
which is  redeemed,  defeased,  retired  or  otherwise  repaid at the time of or
immediately upon consummation of the transactions by which such Person becomes a
Restricted   Subsidiary  or  such  Asset   Acquisition  shall  not  be  Acquired
Indebtedness.

                  Acquirer's  Common  Stock:  the meaning  specified  in Section
15.13(a).

                  Acquiring Company: the meaning specified in Section 15.13(a).

                  Adjusted  Consolidated Net Income:  means, for any period, the
aggregate  net income (or loss) of the Company and its  Restricted  Subsidiaries
for such period determined in conformity with GAAP;  provided that the following
items shall be excluded in computing  Adjusted  Consolidated Net Income (without
duplication):  (i)  the  net  income  of  any  Person  (other  than  net  income
attributable  to a Restricted  Subsidiary)  in which any Person  (other than the
Company or any of its Restricted  Subsidiaries) has a joint interest and the net
income of any  Unrestricted  Subsidiary,  except to the  extent of the amount of
dividends  or other  distributions  actually  paid to the  Company or any of its
Restricted  Subsidiaries  by such other Person or such  Unrestricted  Subsidiary
during such period;  (ii) solely for the purposes of  calculating  the amount of
Restricted  Payments  that  may be made  pursuant  to  clause  (C) of the  first
paragraph  of Section  13.6 (and in such case,  except to the extent  includable
pursuant  to clause (i) above),  the net income (or loss) of any Person  accrued
prior to the date it  becomes  a  Restricted  Subsidiary  or is  merged  into or
consolidated  with the Company or any of its Restricted  Subsidiaries  or all or
substantially  all of the property and assets of such Person are acquired by the
Company or any of its Restricted Subsidiaries;  (iii) any gains or losses (on an
after-tax  basis)  attributable  to Asset  Sales;  (iv)  except for  purposes of
calculating  the amount of  Restricted  Payments  that may be made  pursuant  to
clause (C) of the first paragraph of Section 13.6, any amount paid or accrued as
dividends on Preferred Stock of the Company or any Restricted  Subsidiary  owned
by Persons other than the Company and any of its  Restricted  Subsidiaries;  (v)
all extraordinary gains and extraordinary losses; and (vi) any net income of any
Guarantor that is designated an Unrestricted Subsidiary.

                  Adjusted  Consolidated  Net Tangible  Assets:  means the total
amount of assets of the Company and its Restricted Subsidiaries (less applicable
depreciation,  amortization and other valuation reserves),  except to the extent
resulting from write-ups of capital  assets  (excluding  write-ups in connection
with  accounting for  acquisitions  in conformity  with GAAP),  after  deducting
therefrom  (i)  all  current  liabilities  of the  Company  and  its  Restricted
Subsidiaries

                                      -63-

<PAGE>



(excluding intercompany items) and (ii) all goodwill,  trade names,  trademarks,
patents,  unamortized debt discount and expense and other like intangibles,  all
as set forth on the most recent quarterly or annual  consolidated  balance sheet
of the Company and its Restricted Subsidiaries, prepared in conformity with GAAP
and filed with the Commission.

                  Affiliate:  means, as applied to any Person,  any other Person
directly or indirectly  controlling,  controlled by, or under direct or indirect
common control with,  such Person.  For purposes of this  definition,  "control"
(including,  with correlative meanings, the terms "controlling," "controlled by"
and  "under  common  control  with"),  as  applied  to  any  Person,  means  the
possession,  directly  or  indirectly,  of the  power to  direct  or  cause  the
direction of the  management  and policies of such Person,  whether  through the
ownership of voting securities,  by contract or otherwise.  The term "Affiliate"
when  used  as a  reference  to an  Affiliate  of  the  Company  or  any  of its
Subsidiaries  shall  not  mean or refer  to (i)  BAe,  BAC,  PLC or any of their
Affiliates  (exclusive of the Company or its  Subsidiaries)  or (ii) Matra,  the
Lagardere  Groupe SCA, MCN Sat US Inc.,  MCN Sat Service  S.A.,  or any of their
Affiliates (exclusive of the Company or its Subsidiaries).

                  Agreements and Instruments:  the meaning  specified in Section
5.9.

                  Annual Report: the meaning specified in Section 5.5.
                  -------------

                  Applicable Divisor: means (i) $14 provided that the average of
the  Closing  Price per share of the Common  Stock for the 20 Trading  Days (the
"Twenty Day Average")  immediately  prior to the date as of which the Applicable
Divisor is  determined  (the  "Divisor  Date") is greater than $12.80,  (ii) the
Twenty Day  Average,  if $12.80 or less but  greater  than $10.21 at the Divisor
Date,  or (iii)  $10.21 if the  Twenty  Day  Average  is $10.21 or less,  at the
Divisor Date. The initial  Applicable  Divisor  thresholds amounts ($14, $12.80,
$10.21)  and any  amount  to  which  such  thresholds  are  adjusted,  shall  be
proportionately  decreased in the event that the Company at any time  subdivides
(by  any  stock  split,  stock  dividend,  recapitalization  or  otherwise)  the
outstanding  shares  of  Common  Stock  into  a  greater  number  of  shares  or
proportionately increased in the event that the Company at any time combines (by
reverse stock split,  recapitalization  or otherwise) the outstanding  shares of
Common Stock into a smaller number of shares.

                  Applicable  Law:  means any Federal,  state,  local or foreign
statute,  law,  ordinance,  governmental  rule or  regulation  or any  judgment,
decree,  rule  or  order  of any  court  or  governmental  agency  or  authority
applicable to the Company or any of its  Subsidiaries or any of their respective
properties, assets or operations.

                  Article Tenth:  the meaning specified in Section 5.28.
                  -------------
                  Asset  Acquisition:  means (i) an investment by the Company or
any of its Restricted  Subsidiaries  in any other Person  pursuant to which such
Person  shall  become  a  Restricted  Subsidiary  or  shall  be  merged  into or
consolidated  with the Company or any of its Restricted  Subsidiaries;  provided
that such Person's primary business is related, ancillary or

                                      -64-

<PAGE>



complementary  to the businesses of the Company and its Restricted  Subsidiaries
on the date of such  investment or (ii) an  acquisition by the Company or any of
its Restricted  Subsidiaries of the property and assets of any Person other than
the Company or any of its Restricted Subsidiaries that constitute  substantially
all of a division or line of business of such Person; provided that the property
and assets acquired are related, ancillary or complementary to the businesses of
the Company and its Restricted Subsidiaries on the date of such acquisition.

                  Asset Disposition:  means the sale or other disposition by the
Company or any of its  Restricted  Subsidiaries  (other  than to the  Company or
another  Restricted  Subsidiary) of (i) all or substantially  all of the Capital
Stock of any Restricted  Subsidiary of the Company or (ii) all or  substantially
all of the assets that  constitute a division or line of business of the Company
or any of its Restricted Subsidiaries.

                  Asset  Sale:  means any sale,  transfer  or other  disposition
(including by way of merger, consolidation or sale-leaseback transaction) in one
transaction  or a series of related  transactions  by the  Company or any of its
Restricted  Subsidiaries  to any  Person  other  than the  Company or any of its
Restricted Subsidiaries of (i) all or any of the Capital Stock of any Restricted
Subsidiary,  (ii) all or  substantially  all of the  property  and  assets of an
operating unit or business of the Company or any of its Restricted  Subsidiaries
or (iii) any other  property and assets of the Company or any of its  Restricted
Subsidiaries  outside  the  ordinary  course of  business of the Company or such
Restricted  Subsidiary and, in each case, that is not governed by the provisions
of this Agreement  applicable to mergers,  consolidations and sales of assets of
the  Company;  provided  that "Asset  Sale" shall not include (a) sales or other
dispositions of inventory,  receivables and other current assets or (b) sales or
other dispositions of assets for consideration at least equal to the fair market
value of the  assets  sold or  disposed  of,  provided  that  the  consideration
received would be invested in assets that satisfy clause (B) of Section 13.11.

                  Average Life: means, at any date of determination with respect
to any debt  security,  the  quotient  obtained by  dividing  (i) the sum of the
products of (a) the number of years from such date of determination to the dates
of each successive scheduled principal payment of such debt security and (b) the
amount of such principal payment by (ii) the sum of all such principal payments.

                  BAC:  British  Aerospace  Communications,   Inc.,  a  Delaware
corporation.

                  BAe: British Aerospace Holdings, Inc., a Delaware corporation.

                  Board  of  Directors:  means  the  Board of  Directors  of the
Company or a committee  consisting of one or more directors lawfully  exercising
the relevant powers of the Board.

                  Board Resolution: means a resolution duly adopted by the Board
of  Directors,  a copy of which,  certified  by the  Secretary  or an  Assistant
Secretary of the Company to have been

                                      -65-

<PAGE>



duly adopted by the Board of Directors and to be in full force and effect on the
date of such  certification,  shall  have  been  delivered  to  each  holder  of
Debentures.

                  Business Day:  means any day other than a Saturday,  Sunday or
any other day on which  commercial  banks are  authorized by law to be closed in
New York City or the District of Columbia.

                  Capital Stock:  means, with respect to any Person, any and all
shares,  interests,  participations  or other equivalents  (however  designated,
whether voting or non-voting) in equity of such Person,  whether now outstanding
or issued after the Closing Date, including,  without limitation, all series and
classes of common stock and Preferred Stock.

                  Capitalized Lease:  means, as applied to any Person, any lease
of any  property  (whether  real,  personal  or mixed)  of which the  discounted
present value of the rental  obligations of such Person as lessee, in conformity
with GAAP,  is required to be  capitalized  on the balance sheet of such Person;
and "Capitalized  Lease  Obligations"  means the discounted present value of the
rental obligations under such lease.

                  Change of Control:  occurs when any  "Person" (as such term is
used in  Sections  13(d) and  14(d) of the  Exchange  Act),  is or  becomes  the
"beneficial  owner" (as defined in Rules 13d-3 and 13d-5 under the Exchange Act,
except that a Person shall be deemed to have beneficial  ownership of all shares
that any such Person has the right to acquire, whether such right is exercisable
immediately  or only after the  passage of time)  directly or  indirectly,  of a
majority in the  aggregate  of the total voting power of the Voting Stock of the
Company, whether as a result of issuance of securities of the Company, market or
private purchases, any merger, consolidation,  liquidation or dissolution of the
Company, or otherwise.

                  Change of Control  Period:  means the  ninety  (90) day period
commencing on the date a Change of Control occurs;  provided,  however,  that no
Change of Control Period may commence prior to the Senior Notes  Reduction Date.
A  Change  of  Control  effected  by a  Purchaser  or  any of  such  Purchaser's
Affiliates  shall not  commence a Change of Control  Period with respect to that
Purchaser and any of such Purchaser's Affiliates for purposes of Section 11.3 of
the Agreement.

                  Closing: the meaning specified in Section 2.

                  Closing Date: the meaning specified in Section 2.

                  Closing  Price:  means,  with  respect to each share of Common
Stock or other security,  for any day, the reported last sales price regular way
per share or, in case no such reported sale takes place on such day, the average
of the reported  closing bid and asked prices regular way, in either case (i) on
the New York Stock  Exchange as  reported  in The Wall 

                                      -66-

<PAGE>


Street  Journal  (or  other  similar  newspaper)  for New  York  Stock  Exchange
Composite  Transactions  or, if the Common Stock or other security is not listed
or admitted to trading on such Exchange,  on the principal (as determined by the
Company's Board of Directors)  national  securities exchange on which the Common
Stock or other  security  is listed or admitted to trading or (ii) if not listed
or  admitted  to  trading on any  national  securities  exchange,  on the Nasdaq
National  Market,  or, if the Common  Stock or other  security  is not listed or
admitted to trading on any national  securities exchange or quoted on the Nasdaq
National  Market,  the  average  of the  closing  bid and  asked  prices  in the
over-the-counter  market as furnished by any New York Stock Exchange member firm
selected  from time to time by the Company for that  purpose.  If no such prices
are  available,  the Closing  Price per share of Common  Stock shall be the fair
value of a share as  determined  in good faith by the Board of  Directors of the
Company.

                  Code: means the Internal Revenue Code of 1986, as amended from
time to time and the rules and regulations  promulgated  thereunder from time to
time.

                  Commission:  means the Securities  and Exchange  Commission or
any other Federal agency at the time administering the Securities Act.

                  Common  Stock:  means  the  Common  Stock,  $.01 par value per
share,  of the  Company,  any stock into which such Common Stock shall have been
changed   or  any  stock   resulting   from  any   capital   reorganization   or
reclassification  of such  Common  Stock,  and all  other  stock of any class or
classes (however designated) of the Company the holders of which have the right,
without  limitation as to amount,  either to all or to a share of the balance of
current  dividends and liquidating  dividends after the payment of dividends and
distributions of any shares entitled to preference.

                  Communications Laws: the meaning specified in Section 5.14.

                  Company:  the meaning  specified in the first paragraph of the
Agreement.

                  Company Notice: the meaning specified in Section 11.5(a).

                  Company  Notice  Expiration  Date:  the meaning  specified  in
Section 11.5(a).

                  Consolidated  EBITDA:  means,  for any period,  the sum of the
amounts  for  such  period  of  (i)  Adjusted   Consolidated  Net  Income,  (ii)
Consolidated  Interest  Expense,  to the  extent  such  amount was  deducted  in
calculating Adjusted  Consolidated Net Income, (iii) income taxes, to the extent
such amount was deducted in calculating Adjusted  Consolidated Net Income (other
than income taxes (either  positive or negative)  attributable to  extraordinary
and  non-recurring  gains  or  losses  or sales of  assets),  (iv)  depreciation
expense,  to the  extent  such  amount  was  deducted  in  calculating  Adjusted
Consolidated Net Income, (v) amortization expense, to the extent such amount was
deducted in calculating  Adjusted  Consolidated  Net Income,  and (vi) all other
non-cash items reducing Adjusted  Consolidated Net Income (other than items that
will  require  cash  payments  and for which an  accrual  or  reserve  is, or is
required by GAAP to be, 

                                      -67-

<PAGE>


made), less all non-cash items increasing Adjusted  Consolidated Net Income, all
as  determined  on a  consolidated  basis  for the  Company  and its  Restricted
Subsidiaries in conformity with GAAP.

                  Consolidated  Interest  Expense:  means,  for any period,  the
aggregate  amount of interest  in respect of  Indebtedness  (including,  without
limitation,  amortization of original issue discount on any Indebtedness and the
interest  portion of any deferred payment  obligation,  calculated in accordance
with the effective interest method of accounting; all commissions, discounts and
other fees and  charges  owed with  respect  to  letters of credit and  bankers'
acceptance  financing;  the net costs  associated with Interest Rate Agreements;
and  Indebtedness  that is  Guaranteed  or secured by the  Company or any of its
Restricted  Subsidiaries)  and all but the  principal  component  of  rentals in
respect of Capitalized Lease  Obligations paid,  accrued or scheduled to be paid
or to be accrued by the  Company  and its  Restricted  Subsidiaries  during such
period;   excluding,   however,  any  premiums,   fees  and  expenses  (and  any
amortization thereof) payable in connection with the offering of the Debentures,
all  as  determined  on  a  consolidated  basis  (without  taking  into  account
Unrestricted Subsidiaries) in conformity with GAAP.

                  Consolidated  Leverage Ratio:  means, on any Transaction Date,
the ratio of (i) the  aggregate  amount of  Indebtedness  of the Company and its
Restricted  Subsidiaries on a consolidated basis outstanding on such Transaction
Date to (ii) the  aggregate  amount  of  Consolidated  EBITDA  for the then most
recent four fiscal quarters for which  financial  statements of the Company have
been filed with the Commission  (such four fiscal quarter period being the "Four
Quarter  Period");  provided that (A) pro forma effect shall be given to (x) any
Indebtedness  Incurred from the beginning of the Four Quarter Period through the
Transaction Date (the "Reference  Period"),  to the extent such  Indebtedness is
outstanding  on  the  Transaction  Date  and  (y)  any  Indebtedness   that  was
outstanding during such Reference Period but that is not outstanding or is to be
repaid on the  Transaction  Date;  (B) pro forma  effect shall be given to Asset
Dispositions and Asset  Acquisitions  (including  giving pro forma effect to the
application  of  proceeds  of any Asset  Disposition)  that  occur  during  such
Reference  Period, as if they had occurred and such proceeds had been applied on
the first day of such Reference Period;  and (C) pro forma effect shall be given
to asset dispositions and asset acquisitions  (including giving pro forma effect
to the application of proceeds of any asset  disposition) that have been made by
any Person that has become a  Restricted  Subsidiary  or has been merged with or
into the Company or any Restricted  Subsidiary  during such Reference Period and
that would have constituted  Asset  Dispositions or Asset  Acquisitions had such
transactions  occurred  when such Person was a Restricted  Subsidiary as if such
asset  dispositions  or asset  acquisitions  were  Asset  Dispositions  or Asset
Acquisitions that occurred on the first day of such Reference  Period;  provided
that to the extent that  clause (B) or (C) of this  sentence  requires  that pro
forma effect be given to an Asset  Acquisition  or Asset  Disposition,  such pro
forma calculation shall be based upon the four full fiscal quarters  immediately
preceding the Transaction Date of the Person, or division or line of business of
the Person,  that is acquired or disposed  for which  financial  information  is
available.


                                      -68-

<PAGE>



                  Consolidated Net Worth:  means, at any date of  determination,
stockholders'  equity as set forth on the most recently  available  quarterly or
annual consolidated balance sheet of the Company and its Restricted Subsidiaries
(which  shall be as of a date not  more  than 90 days  prior to the date of such
computation,  and which shall not take into account Unrestricted  Subsidiaries),
less any  amounts  attributable  to  Disqualified  Stock or any equity  security
convertible  into or exchangeable for  Indebtedness,  the cost of treasury stock
and the principal amount of any promissory notes receivable from the sale of the
Capital Stock of the Company or any of its Restricted Subsidiaries, each item to
be determined in conformity with GAAP (excluding the effects of foreign currency
exchange  adjustments  under Financial  Accounting  Standards Board Statement of
Financial Accounting Standards No. 52).

                  Consummation Date: the meaning specified in Section 15.13(a).
                  -----------------
                  Conversion Rate: the meaning specified in Section 15.1.
                  ---------------
                  Conversion  Shares:  the shares of Common Stock to be received
upon conversion of any Debenture as provided in Section 15.

                  Converted Debenture Portion:  the meaning specified in Section
11.5(a).

                  Convertible  Securities means any stock or other securities of
the Company convertible into or exchangeable for Common Stock.

                  Currency  Agreement:  means  any  foreign  exchange  contract,
currency swap agreement or other similar  agreement or  arrangement  designed to
protect the Company or any of its Restricted  Subsidiaries  against fluctuations
in  currency  values to or under  which  the  Company  or any of its  Restricted
Subsidiaries  is a party or a beneficiary on the Closing Date or becomes a party
or a beneficiary thereafter.

                  Debentures:  the meaning specified in Section 1.1.
                  ----------
                  Debenture Payment:  the meaning specified in Section 14.2.
                  -----------------
                  Decision Period: the meaning specified in Section 11.5(a).
                  ---------------
                  Dilutive Event:  the meaning specified in Section 15.5(1).
                  -------------
                  Disqualified Stock: means any class or series of Capital Stock
of any Person  that by its terms or  otherwise  is (i)  required  to be redeemed
prior to the Stated Maturity of the Debentures, (ii) redeemable at the option of
the  holder of such  class or series of  Capital  Stock at any time prior to the
Stated Maturity of the Debentures or (iii)  convertible into or exchangeable for
Capital Stock referred to in clause (i) or (ii) above or  Indebtedness  having a

                                      -69-

<PAGE>


scheduled  maturity prior to the Stated  Maturity of the  Debentures;  provided,
that any  Capital  Stock that would not  constitute  Disqualified  Stock but for
provisions  hereof  giving  holders  thereof the right to require such Person to
repurchase  or redeem such  Capital  Stock upon the  occurrence  of a "change of
control"  occurring  prior to the Stated  Maturity of the  Debentures  shall not
constitute  Disqualified Stock if the "change of control" provisions  applicable
to such Capital Stock are no more favorable to the holders of such Capital Stock
than  the   provisions   contained  in  Section  11.3  and  such  Capital  Stock
specifically  provides  that such Person will not  repurchase or redeem any such
stock  pursuant to such  provision  prior to the  Company's  repurchase  of such
Debentures as are required to be repurchased pursuant to Section 11.3.

                  Documents:  means all documents  delivered in connection  with
the transactions  contemplated by this Agreement,  including without limitation,
the Debentures,  the Subsidiary Guarantee and the Registration Rights Agreement,
collectively,  or each of  such  documents  singularly,  and  any  documents  or
instruments contemplated by or executed in connection with any of them or any of
the transactions contemplated hereby or thereby.

                  ERISA:  means the Employee  Retirement  Income Security Act of
1974, as amended from time to time,  and the rules and  regulations  promulgated
thereunder from time to time in effect.

                  ERISA  Affiliate:  any  trade  or  business  (whether  or  not
incorporated)  that is treated as a single employer  together with either ONS or
the Company under Section 414 of the Code.

                  Environmental Laws: the meaning specified in Section 5.13
                  ------------------
                  Event of Default: the meaning specified in Section 18.1.

                  Exchange Act: the Securities Exchange Act of 1934, as amended,
or any similar  Federal  statute and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

                  Exchange  Agreement:  the Section 351 Exchange  Agreement  and
Plan  Conversion  dated as of June 1996,  as  amended,  between  and among Orion
Atlantic,   ONS,   Orion   Satellite   Corporation,   BAC,  COM  DEV   Satellite
Communications  Limited,   Kingston  Communications  Limited,   Lockheed  Martin
Commercial  Launch  Services,  Inc.,  MCN SAT U.S.,  Inc.  and  Trans-  Atlantic
Satellite,  Inc.,  pursuant to which each of the Exchanging Partners (as defined
therein) will transfer their limited partnership  interests in Orion Atlantic to
the Company in exchange for shares of Series C Preferred Stock.

                  Excluded  Issuance:  means the issue or sale of (i)  shares of
Common Stock by the Company  pursuant to the exercise of Options and Convertible
Securities outstanding  immediately prior to the Closing Date at exercise prices
that are greater than or equal to the respective exercise prices in effect as of
the Closing Date (as adjusted  pursuant to the terms of such  

                                      -70-

<PAGE>


securities to give effect to stock dividends or stock splits or a combination of
shares in connection with a  recapitalization,  merger,  consolidation  or other
reorganization occurring after the Closing Date), (ii) up to an aggregate of one
hundred and fifty thousand  (150,000)  shares of Common Stock by the Company for
any purpose,  (iii) Options to acquire Common Stock by the Company pursuant to a
resolution  of, or a stock option plan approved by a resolution of, the Board of
Directors  of  the  Company  (or  the  compensation  committee  thereof)  to the
Company's  employees or directors,  and (iv) shares of Common Stock,  Options or
Convertible  Securities  (or shares of Common Stock  pursuant to the exercise of
Options  and  Convertible  Securities)  as part  of or in  connection  with  the
Financing Transaction.

                  Execution  Date:  means  the date on which  the  Agreement  is
executed by the parties.

                  Expiration Time: the meaning specified in Section 15.4(6).
                  ---------------
                  fair  market  value:  means the price that would be paid in an
arm's-length  transaction  between  an  informed  and  willing  seller  under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as determined in good faith by the Board of Directors, whose determination shall
be conclusive if evidenced by a Board Resolution.

                  Federal Bankruptcy Code: Title 11, United States Code.
                  -----------------------
                  Financing Transaction:  means offer and sale by the Company of
the  Senior  Notes  in an  underwritten  public  offering  registered  with  the
Commission  or in a private  placement  transaction  that results in the Company
receiving cash proceeds in the minimum amount of  $225,000,000,  after deduction
of all escrowed amounts, underwriting commissions, fees and expenses.

                  FCC: the Federal Communications Commission.
                  ---------------
                  Four Quarter Period:  the meaning specified in Section 19.1.
                  -------------------
                  GAAP: means generally  accepted  accounting  principles in the
United States of America as in effect as of the Closing Date, including, without
limitation, those set forth in the opinions and pronouncements of the Accounting
Principles Board of the American  Institute of Certified Public  Accountants and
statements and pronouncements of the Financial  Accounting Standards Board or in
such other statements by such other entity as approved by a significant  segment
of the accounting profession.  All ratios and computations contained or referred
to in this Agreement or the Debentures shall be computed in conformity with GAAP
applied on a consistent  basis,  except that  calculations  made for purposes of
determining compliance with the terms of the covenants and with other provisions
of this Agreement or the  Debentures  shall be made without giving effect to (i)
the amortization of any expenses incurred in connection with the offering of the
Debentures  and (ii)  except as  otherwise  provided,  the  amortization  of any
amounts required or permitted by Accounting Principles Board Opinion Nos. 16 and
17.


                                      -71-

<PAGE>



                  Government   Securities:    means   direct   obligations   of,
obligations fully guaranteed by, or participations in pools consisting solely of
obligations  of or  obligations  guaranteed by, the United States of America for
the payment of which  guarantee or obligations  the full faith and credit of the
United  States of America is pledged and which are not callable or redeemable at
the option of the issuer thereof.

                  Governmental Authority:
                  -----------------------
                  (a)       the government of

                            (i) the  United  States of  America  or any State or
                  other political subdivi- sion thereof, or

                            (ii) any  jurisdiction  in which the  Company or any
                  Subsidiary conducts all or any part of its business,  or which
                  asserts jurisdiction over any properties of the Company or any
                  Subsidiary, or

                  (b) any entity exercising  executive,  legislative,  judicial,
         regulatory or  administrative  functions of, or pertaining to, any such
         government.

                  Governmental Licenses: the meaning specified in Section 5.12.
                  ---------------------
                  Guarantee:  means any obligation,  contingent or otherwise, of
any  Person  directly  or  indirectly  guaranteeing  any  Indebtedness  or other
obligation  of any other  Person and,  without  limiting the  generality  of the
foregoing, any obligation,  direct or indirect, contingent or otherwise, of such
Person (i) to purchase or pay (or  advance or supply  funds for the  purchase or
payment of) such  Indebtedness or other obligation of such other Person (whether
arising by virtue of partnership arrangements, or by agreements to keep-well, to
purchase assets, goods,  securities or services, to take-or-pay,  or to maintain
financial  statement  conditions or otherwise) or (ii) entered into for purposes
of  assuring  in any other  manner  the  obligee of such  Indebtedness  or other
obligation  of the payment  thereof or to protect such  obligee  against loss in
respect thereof (in whole or in part);  provided that the term "Guarantee" shall
not include  endorsements  for  collection or deposit in the ordinary  course of
business. The term "Guarantee" used as a verb has a corresponding meaning.

                  Guarantors:  collectively,  means (i) the  Subsidiaries of the
Company that execute the Subsidiary  Guarantee attached hereto as Exhibit B; and
(ii) any other Person that  subsequently  Guarantees  the Company's  obligations
under the Debentures  pursuant to Section 12.8 or 13.8; provided that any Person
that becomes an  Unrestricted  Subsidiary in compliance  with Section 13.5 shall
not be included in "Guarantors" after becoming an Unrestricted Subsidiary.

                  Hazardous Materials: the meaning specified in Section 5.13.
                  -------------------

                                      -72-

<PAGE>



                  holder:  means with  respect to any  Debenture,  the Person in
whose name such  Debenture  is  registered  in the  register  maintained  by the
Company pursuant to Section 16.1.

                  "Holder Notice":  the meaning specified in Section 11.5(a).

                  HSR Act: means the  Hart-Scott-Rodino  Antitrust  Improvements
Act of 1976, as amended to date.

                  HSR  Suspension  Period:  the  meaning  specified  in  Section
11.5(c).

                  Incur:  means,  with  respect to any  Indebtedness,  to incur,
create, issue, assume,  Guarantee or otherwise become liable for or with respect
to, or become responsible for, the payment of,  contingently or otherwise,  such
Indebtedness,  including an  "Incurrence"  of Indebtedness by reason of a Person
becoming a  Restricted  Subsidiary  of the  Company;  provided  that neither the
accrual of interest  nor the  accretion  of  original  issue  discount  shall be
considered an Incurrence of Indebtedness.

                  Indebtedness: means, with respect to any Person at any date of
determination  (without  duplication),  (i) all  indebtedness of such Person for
borrowed  money,  (ii)  all  obligations  of such  Person  evidenced  by  bonds,
debentures,  notes or other similar  instruments,  (iii) all obligations of such
Person in respect of letters of credit or other similar  instruments  (including
reimbursement  obligations with respect thereto, but excluding  obligations with
respect to  letters  of credit  (including  trade  letters  of credit)  securing
obligations (other than obligations  described in (i) or (ii) above or (v), (vi)
or (vii) below)  entered into in the ordinary  course of business of such Person
to the extent such  letters of credit are not drawn upon or, if drawn  upon,  to
the extent  such  drawing is  reimbursed  no later than the third  Business  Day
following  receipt  by such  Person  of a demand  for  reimbursement),  (iv) all
obligations  of such Person to pay the  deferred  and unpaid  purchase  price of
property or services, which purchase price is due more than six months after the
date of placing such property in service or taking delivery and title thereto or
the completion of such services,  except Trade Payables,  (v) all obligations of
such Person as lessee under Capitalized  Leases,  (vi) all Indebtedness of other
Persons  secured  by a Lien on any  asset of such  Person,  whether  or not such
Indebtedness  is  assumed  by such  Person;  provided  that the  amount  of such
Indebtedness  shall be the lesser of (A) the fair market  value of such asset at
such date of determination  and (B) the amount of such  Indebtedness,  (vii) all
Indebtedness  of other  Persons  Guaranteed  by such  Person to the extent  such
Indebtedness is Guaranteed by such Person and (viii) to the extent not otherwise
included in this definition,  obligations under Currency Agreements and Interest
Rate  Agreements.  The amount of Indebtedness of any Person at any date shall be
the  outstanding  balance  at such  date  of all  unconditional  obligations  as
described  above  and,  with  respect to  contingent  obligations,  the  maximum
liability upon the occurrence of the contingency  giving rise to the obligation,
provided  (A) that  the  amount  outstanding  at any time  with  respect  to any
Indebtedness  issued with original issue discount is the original issue price of
such Indebtedness,  (B) Permitted  Customer Advances and any money borrowed,  at
the time of the Incurrence of any Indebtedness, in order to pre-fund the payment

                                      -73-

<PAGE>



of interest on such  Indebtedness,  shall be deemed not to be "Indebtedness" and
(C) that Indebtedness shall not include any liability for federal,  state, local
or other taxes.

                  Insolvency Proceeding:  the meaning specified in Section 14.7.
- ---------------------  Interest  Rate  Agreement:  means any interest  rate swap
agreement,   interest  rate  cap  agreement  or  other  financial  agreement  or
arrangement designed to protect the Company or any Restricted Subsidiary against
fluctuations in interest rates.

                  Interest  Shares:  means  the  shares  of  Common  Stock to be
received by the holders of the  Debentures  as interest in  accordance  with the
terms of the Debentures and this Agreement.

                  Investment:  in  any  Person  means  any  direct  or  indirect
advance,  loan or other extension of credit (including,  without limitation,  by
way of Guarantee or similar arrangement;  but excluding advances to customers in
the ordinary course of business that are, in conformity  with GAAP,  recorded as
accounts  receivable  on the  balance  sheet of the  Company  or its  Restricted
Subsidiaries)  or capital  contribution  to (by means of any transfer of cash or
other property to others or any payment for property or services for the account
or use of others),  or any  purchase or  acquisition  of Capital  Stock,  bonds,
notes,  debentures or other similar instruments issued by, such Person and shall
include  (i) the  designation  of a  Restricted  Subsidiary  as an  Unrestricted
Subsidiary  and (ii) the fair market  value of the  Capital  Stock (or any other
Investment),  held by the Company or any of its Restricted Subsidiaries,  of (or
in) any Person that has ceased to be a Restricted Subsidiary,  including without
limitation,  by reason of any  transaction  permitted by clause (iii) of Section
13.7. For purposes of the definition of  "Unrestricted  Subsidiary"  and Section
13.6, (i) "Investment" shall include the fair market value of the assets (net of
liabilities  (other than liabilities to the Company or any of its Subsidiaries))
of any  Restricted  Subsidiary  at the time that such  Restricted  Subsidiary is
designated an Unrestricted Subsidiary,  (ii) the fair market value of the assets
(net  of  liabilities  (other  than  liabilities  to the  Company  or any of its
Subsidiaries)) of any Unrestricted Subsidiary at the time that such Unrestricted
Subsidiary is designated a Restricted Subsidiary shall be considered a reduction
in  outstanding  Investments  and (iii) any property  transferred  to or from an
Unrestricted  Subsidiary shall be valued at its fair market value at the time of
such transfer.

                  Investment Company Act: the meaning specified in Section 5.23.
                  ----------------------
                  ITU:  the International Telecommunication Union.
                  ---
                  Junior Securities:  the meaning specified in Section 14.9.
                  -----------------
                  Lien:   means  any  mortgage,   pledge,   security   interest,
encumbrance,  lien or charge of any kind  (including,  without  limitation,  any
conditional  sale or other  title  retention  agreement  or lease in the  nature
thereof or any agreement to give any security interest).

                  Mandatory Sale:  the meaning specified in Section 11.4.
                  --------------
                                      -74-

<PAGE>




                  Mandatory Sale Date: the meaning specified in Section 11.4(a).
                  -------------------

                  Mandatory Sale Price: the meaning specified in Section 11.4.
                  --------------------

                  Market Price:  the meaning specified in Section 15.5(6).
                  ------------

                  Material:   means   material  in  relation  to  the  business,
operations,  affairs, financial condition, assets, or properties of the Company,
ONS and the Subsidiaries taken as a whole.

                  Material  Adverse Effect:  means a material  adverse effect on
the properties, business, operations, earnings, assets, liabilities or financial
condition of the Company, ONS and the Subsidiaries,  taken as a whole, or on the
ability of the Company,  ONS or the  Subsidiaries  to perform  their  respective
obligations under this Agreement, the Debentures or any of the other Documents.

                  Matra: Matra Marconi Space UK Limited, a company organized and
existing under the laws of England and Wales.

                  Merger  Documents:  means (a) the Agreement and Plan of Merger
of Orion Merger Company,  Inc.  ("SUB") with and into ONS, by and among SUB, ONS
and the Company, and (b) the Certificate of Merger of SUB with and into ONS.

                  Merger  Transaction:  means the  transaction  described in the
Registration  Statement and the Merger Documents  pursuant to which  outstanding
shares of the common stock and  Preferred  Stock of ONS are exchanged for shares
of the Common Stock and Preferred  Stock of the Company on a  one-for-one  basis
and pursuant to which ONS shall become a wholly-owned subsidiary of the Company.

                  Moody's:   means  Moody's  Investors  Service,  Inc.  and  its
successors.

                  Morgan: the meaning specified in Section 4.1.
                  ------

                  Multiemployer   Plan:  means  any  Plan  which  constitutes  a
"multiemployer plan" (as such term is defined in Section 4001(a)(3) of ERISA).

                  Net Cash Proceeds:  means, (a) with respect to any Asset Sale,
the  proceeds  of  such  Asset  Sale in the  form  of cash or cash  equivalents,
including  payments in respect of deferred  payment  obligations  (to the extent
corresponding  to the  principal,  but not  interest,  component  thereof)  when
received  in the form of cash or cash  equivalents  (except to the  extent  such
obligations  are financed or sold with recourse to the Company or any Restricted
Subsidiary)  and proceeds from the  conversion of other  property  received when
converted to cash or cash  equivalents,  net of (i)  brokerage  commissions  and
other fees and expenses  (including  fees and expenses of counsel and investment
bankers)  related to such Asset Sale,  (ii) provisions for all 

                                      -75-

<PAGE>


taxes  (whether  or not such taxes will  actually  be paid or are  payable) as a
result  of such  Asset  Sale  without  regard  to the  consolidated  results  of
operations  of the Company and its  Restricted  Subsidiaries,  taken as a whole,
(iii) payments made to repay Indebtedness or any other obligation outstanding at
the time of such Asset Sale that either (A) is secured by a Lien on the property
or assets  sold or (B) is  required to be paid as a result of such sale and (iv)
appropriate  amounts to be provided by the Company or any Restricted  Subsidiary
of the Company as a reserve against any  liabilities  associated with such Asset
Sale, including,  without limitation,  pension and other post-employment benefit
liabilities, liabilities related to compliance with Environmental Laws and other
environmental  matters and  liabilities  under any  indemnification  obligations
associated  with such Asset Sale, all as determined in conformity  with GAAP and
(b) with respect to any issuance or sale of Capital Stock,  the proceeds of such
issuance or sale in the form of cash or cash equivalents,  including payments in
respect of deferred  payment  obligations  (to the extent  corresponding  to the
principal,  but not  interest,  component  thereof) when received in the form of
cash or cash equivalents  (except to the extent such obligations are financed or
sold with recourse to the Company or any  Restricted  Subsidiary of the Company)
and proceeds from the  conversion of other  property  received when converted to
cash  or  cash  equivalents,   net  of  attorney's  fees,   accountants'   fees,
underwriters' or placement agents' fees, discounts or commissions and brokerage,
consultant and other fees incurred in connection  with such issuance or sale and
net of taxes paid or payable as a result thereof.

                  Officers'  Certificate:  means  a  certificate  signed  by the
Chairman  of the  Board,  a Vice  Chairman  of the  Board,  the Chief  Executive
Officer,  the President or a Vice President and by the Chief Financial  Officer,
the Treasurer,  an Assistant Treasurer,  the Secretary or an Assistant Secretary
of the Company.  One of the officers signing an Officers'  Certificate  shall be
the principal executive, financial or accounting officer of the Company.

                  ONS: Orion Network Systems, Inc., a Delaware corporation.
                  ---
                  ONS Common Stock: the meaning specified in Section 5.2(a).
                  ----------------
                  ONS Preferred Stock:  the meaning specified in Section 5.2(a).
                  -------------------
                  ONS Series A Preferred Stock: the meaning specified in Section
5.2(a).

                  ONS Series B Preferred Stock: the meaning specified in Section
5.2(a).

                  Options:  means any  options,  warrants or rights to subscribe
for or to purchase Common Stock or any Convertible Securities.

                  Orion  Atlantic:  International  Private  Satellite  Partners,
L.P., a Delaware limited partnership.



                                      -76-

<PAGE>



                  Orion 2 and Orion 3: mean, respectively, each of the first two
(2) satellites  with respect to which the company has a Successful  Launch after
the  Closing  Date,  and any  replacement  for either of such  satellites.  

                  Other  Securities:  means any stock (other than Common  Stock)
and other securities of the Company or any other Person (corporate or otherwise)
which the holders of the Debentures at any time shall be entitled to receive, or
shall have  received,  upon the conversion of the  Debentures,  in lieu of or in
addition to Common  Stock,  or which at any time shall be issuable or shall have
been  issued  in  exchange  for or in  replacement  of  Common  Stock  or  Other
Securities pursuant to Section 15.13 or otherwise.

                  Outstanding:  means when used with  respect to  Debentures  or
Senior Notes  means,  as the case may be, as of the date of  determination,  all
Debentures theretofore delivered under this Agreement, or Senior Notes delivered
under the Senior Indentures, except:

                  (i) Debentures,  or Senior Notes,  theretofore canceled by the
         Company or delivered to the Company for cancellation;

                  (ii)   Debentures,   or  Senior  Notes,  for  the  payment  or
         redemption  of which money in the  necessary  amount has been set aside
         and  segregated  in  trust  by the  Company  for  the  holders  of such
         Debentures,  or Senior  Notes,  provided  that if such  Debentures,  or
         Senior Notes,  are to be redeemed,  notice of such  redemption has been
         duly given pursuant to this  Agreement,  or Senior  Indentures,  as the
         case may be;

                  (iii)  Senior  Notes owned by the Company or any  Affiliate of
         the Company,  or BAe, BAC, PLC or any of their Affiliates,  or Matra or
         any of its Affiliates; and

                  (iv)  Debentures  that have been converted in accordance  with
         Section 15;

provided,  however,  that in  determining  whether the holders of the  requisite
principal  amount of Debentures have given any request,  demand,  authorization,
direction, notice, consent or waiver hereunder,  Debentures owned by the Company
or any other obligor upon the  Debentures or any  Subsidiary or Affiliate of the
Company  or such  other  obligor  shall  be  disregarded  and  deemed  not to be
Outstanding.

                  Outstanding on an As-Converted  Basis  immediately  before the
Dilutive Event: the meaning specified in Section 15.5(1).

                  Payment  Blockage  Period:  the meaning  specified  in Section
14.3.

                                      -77-

<PAGE>


                  PBGC: means the Pension Benefit Guaranty  Corporation referred
to and defined in ERISA or any successor thereto.

                  Permitted Customer Advances:  means obligations of the Company
or any  Restricted  Subsidiary  to repay  money  received by the Company or such
Restricted  Subsidiary from customers as bona fide prepayment for services to be
provided  by, or  purchases  to be made from,  the  Company  or such  Restricted
Subsidiary.

                  Permitted  Investment:  means (i) an Investment in the Company
or a  Restricted  Subsidiary  or a Person  which  will,  upon the making of such
Investment,  become a Restricted Subsidiary or be merged or consolidated with or
into or transfer or convey all or  substantially  all its assets to, the Company
or a Restricted  Subsidiary;  provided  that such person's  primary  business is
related,  ancillary or  complementary  to the  businesses of the Company and its
Restricted  Subsidiaries  on the date of such  Investment;  (ii)  Temporary Cash
Investments;  (iii) payroll,  travel and similar  advances to cover matters that
are expected at the time of such  advances  ultimately to be treated as expenses
in accordance with GAAP; and (iv) stock,  obligations or securities  received in
satisfaction of judgments.

                  Permitted  Liens:  means  (i) Liens  for  taxes,  assessments,
governmental  charges  or  claims  that are  being  contested  in good  faith by
appropriate legal proceedings  promptly instituted and diligently  conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in  conformity  with GAAP shall have been made;  (ii)  statutory  and common law
Liens  of  landlords   and   carriers,   warehousemen,   mechanics,   suppliers,
materialmen,  repairmen or other similar Liens arising in the ordinary course of
business and with respect to amounts not yet  delinquent  or being  contested in
good faith by appropriate legal proceedings  promptly  instituted and diligently
conducted  and for which a reserve or other  appropriate  provision,  if any, as
shall be  required  in  conformity  with GAAP shall have been made;  (iii) Liens
incurred or deposits made in the ordinary  course of business in connection with
workers'  compensation,   unemployment  insurance  and  other  types  of  social
security;  (iv) Liens  incurred or deposits  made to secure the  performance  of
tenders,   bids,   leases,   statutory  or  regulatory   obligations,   bankers'
acceptances,  surety and appeal bonds,  government  contracts,  performance  and
return-of-money  bonds and other obligations of a similar nature incurred in the
ordinary  course of  business  (exclusive  of  obligations  for the  payment  of
borrowed money); (v) easements,  rights-of-way,  municipal and zoning ordinances
and similar charges, encumbrances, title defects or other irregularities that do
not materially  interfere with the ordinary course of business of the Company or
any of  its  Restricted  Subsidiaries;  (vi)  Liens  (including  extensions  and
renewals  thereof)  upon real or personal  property  acquired  after the Closing
Date;  provided that (a) such Lien is created solely for the purpose of securing
Indebtedness  Incurred, in accordance with Section 13.5, (1) to finance the cost
(including  the cost of  improvement,  launch (in the case of property that is a
satellite), insurance (in the case of property that is a satellite), development
and  design,  installation  or  construction)  of the item of property or assets
subject  thereto and such Lien is created prior to, at the time of or within six
(6) months after the later of the acquisition, the completion of construction or
the  commencement  of full  operation of such  property or (2) 

                                      -78-

<PAGE>


to refinance any Indebtedness previously so secured, (b) the principal amount of
the Indebtedness secured by such Lien does not exceed one hundred percent (100%)
of such cost, (c) any Lien permitted by this clause shall not extend to or cover
any  property  or assets  other  than such item of  property  or assets  and any
improvements  on such item and (d) such Liens may not relate to Orion 2 or Orion
3; (vii) leases or subleases granted to others that do not materially  interfere
with  the  ordinary  course  of  business  of the  Company  and  its  Restricted
Subsidiaries,  taken as a whole;  (viii)  Liens  encumbering  property or assets
under  construction  arising from progress or partial  payments by a customer of
the Company or its Restricted  Subsidiaries relating to such property or assets;
(ix)  any  interest  or  title  of a  lessor  in  the  property  subject  to any
Capitalized  Lease or operating  lease;  (x) Liens  arising from filing  Uniform
Commercial Code financing  statements  regarding leases;  (xi) Liens on property
of, or on shares of Capital Stock or Indebtedness of, any Person existing at the
time such  Person  becomes,  or  becomes a part of, any  Restricted  Subsidiary;
provided that such Liens do not extend to or cover any property or assets of the
Company or any Restricted Subsidiary other than the property or assets acquired;
(xii) Liens in favor of the Company or any Restricted  Subsidiary;  (xiii) Liens
arising from the  rendering of a final  judgment or order against the Company or
any Restricted  Subsidiary of the Company that does not give rise to an Event of
Default; (xiv) Liens securing reimbursement  obligations with respect to letters
of credit that encumber documents and other property relating to such letters of
credit and the products and proceeds thereof; (xv) Liens in favor of customs and
revenue  authorities  arising  as a matter of law to secure  payment  of customs
duties in connection  with the  importation  of goods;  (xvi) Liens  encumbering
customary initial deposits and margin deposits,  and other Liens that are within
the general  parameters  customary  in the industry and incurred in the ordinary
course of business,  in each case,  securing  Indebtedness  under  Interest Rate
Agreements  and  Currency  Agreements  and forward  contracts,  options,  future
contracts, futures options or similar agreements or arrangements designed solely
to protect the Company or any of its Restricted  Subsidiaries  from fluctuations
in interest rates, currencies or the price of commodities;  (xvii) Liens arising
out of conditional  sale, title retention,  consignment or similar  arrangements
for the sale of  goods  entered  into by the  Company  or any of its  Restricted
Subsidiaries  in the  ordinary  course of business in  accordance  with the past
practices of the Company and its  Restricted  Subsidiaries  prior to the Closing
Date; (xviii) Liens on or sales of receivables;  (xix) Liens on amounts of money
or Temporary Cash  Investments  that each represent bona fide  prepayments of at
least $5 million on agreements  for the  long-term  sale or lease of capacity on
any satellite owned by the Company or a Restricted  Subsidiary,  but only to the
extent that the amount of money or  Temporary  Cash  Investments  subject to any
such Lien does not exceed the amount of such prepayment and reasonable  interest
thereon;  and (xx)  Liens  encumbering  contracts  between  the  Company  or any
Restricted Subsidiary and any third party customer relating to the use of a VSAT
owned by the Company or any  Restricted  Subsidiary but only if, and so long as,
the  Indebtedness  secured by any such Lien is also secured by a Lien  permitted
under clause (vi) of this definition encumbering such VSAT.

                  Person: means an individual, partnership, corporation, limited
liability  company,  association,   trust,  unincorporated  organization,  or  a
government or agency or political subdivision thereof.

                 
                                      -79-

<PAGE>

                  Plan: means an "employee  benefit plan" (as defined in Section
3(3) of  ERISA)  which is or has been  established  or  maintained,  or to which
contributions  are or have been made or are required to be made, by the Company,
ONS or any ERISA Affiliate.

                  PLC: British  Aerospace Plc, a company  organized and existing
under the laws of England and Wales.

                  Potential Event of Default: means an event or condition which,
with notice or lapse of time or both, would become an Event of Default.

                  Preferred  Stock:  as  applied  to the  Capital  Stock  of any
corporation,  means Capital Stock of any class or classes  (however  designated)
which is preferred as to the payment of dividends,  or as to the distribution of
assets upon any voluntary or  involuntary  liquidation  or  dissolution  of such
corporation,   over  shares  of  Capital  Stock  of  any  other  class  of  such
corporation.

                  Proceeding: the meaning specified in Section 14.2.
                  ----------
                  Purchased Shares:  the meaning specified in Section 15.4(6).
                  ----------------

                  Purchaser:  means either BAe or Matra (or any Affiliate of BAe
or Matra  substituted  as a purchaser of Debentures  pursuant to Section 24) and
Purchasers means BAe and Matra or any such Affiliate.

                  PUC: the meaning specified in Section 5.11.
                  ---

                  Redemption Date: means when used with respect to any Debenture
to be redeemed,  means the date fixed for such redemption by or pursuant to this
Agreement.

                  Redemption  Indebtedness:  means  Indebtedness  of the Company
which  is by its  terms  expressly  subordinated  in  right  of  payment  of the
Debentures  and is incurred for the sole purpose of  financing  the  redemption,
repurchase  or  acquisition  of shares of Series A  Preferred  Stock or Series B
Preferred Stock.

                  Redemption  Price:  when used with respect to any Debenture to
be  redeemed,  means the price at which it is to be  redeemed  pursuant  to this
Agreement.

                  Reference Period: the meaning specified in Section 19.1
                  ----------------
                  Registration  Statement:  means the registration  statement of
the Company on Form S-4 filed with the Commission in connection  with the Merger
Transaction, including the proxy statement and the prospectus contained therein,
all exhibits thereto and all material incorporated by reference therein.

 
                                      -80-

<PAGE>

                 Reorganization  Transaction:  the meaning specified in Section
15.13(a).

                  Repayment Event: the meaning specified in Section 5.9.
                  ---------------
                  Repurchase Date:  the meaning specified in Section 11.3 (b).

                  Repurchase Price: the meaning specified in Section 11.3 (b).

                  Responsible Officer: shall mean the President, Chief Executive
Officer or Chief Financial Officer of the Company.

                  Restricted Payments: the meaning specified in Section 13.6.

                  Restricted  Subsidiary:  means any  Subsidiary  of the Company
other than an Unrestricted Subsidiary.

                  S&P: means Standard & Poor's Ratings Group and its successors.
                  ---

                  Scheduled  Closing  Date:  the  meaning  specified  in Section
4.14(b).

                  Securities  Act: means the Securities Act of 1933, as amended,
or any similar  Federal  statute and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

                  Senior Indebtedness:  means Indebtedness  (including,  without
limitation  the Senior Notes) unless,  in the instrument  creating or evidencing
the same or pursuant to which the same is outstanding,  it is provided that such
obligations  are pari passu or junior or  subordinate in right of payment to the
Debentures;  provided,  however, that Senior Indebtedness shall not be deemed to
include (1) any obligation of the Company to any  Subsidiary,  (2) any liability
for federal,  state, local or other taxes owed or owing by the Company,  (3) any
accounts  payable or other liability to trade creditors  arising in the ordinary
course of business (including guarantees thereof or instruments  evidencing such
liabilities), (4) any indebtedness, guarantee or obligation of the Company which
is subordinate or junior in any respect to any other indebtedness,  guarantee or
obligation of Company (including,  without limitation,  the Debentures),  or (5)
the portion of any Indebtedness issued in violation of this Agreement.

                  Senior Indentures:  means the indentures  governing the Senior
Notes as originally executed or as amended or supplemented from time to time.

                  Senior Nonmonetary  Default:  the meaning specified in Section
14.3.

                  Senior Notes:  means the Senior Unsecured  Overfunded Cash Pay
Notes and the Senior Unsecured Discount Notes.



                                      -81-

<PAGE>

                  Senior Notes  Reduction  Date:  means the first date after the
Closing on which the aggregate  principal amount of Senior Notes  Outstanding is
less than $50,000,000.

                  Senior Payment Default: the meaning specified in Section 14.3.
                  ----------------------
                  Senior  Unsecured  Discount  Notes:  means the Senior Discount
Notes due 2007 to be issued  under an  indenture,  to be dated as of the Closing
Date,  between  the  Company,  as  issuer,  each  of  the  Company's  Restricted
Subsidiaries, as guarantors, and a trustee.

                  Senior Unsecured  Overfunded Cash Pay Notes:  means the Senior
Notes due 2007 to be issued  under an  indenture,  to be dated as of the Closing
Date,  between  the  Company,  as  issuer,  each  of  the  Company's  Restricted
Subsidiaries, as guarantors, and a trustee.

                  Series A  Preferred  Stock:  means the  Company's  Series A 8%
Cumulative Redeemable Convertible Preferred Stock, par value $0.01 per share.

                  Series B  Preferred  Stock:  means the  Company's  Series B 8%
Cumulative Redeemable Convertible Preferred Stock, par value $0.01 per share.

                  Series  C  Designation:   the  meaning  specified  in  Section
5.28(a).

                  Series C  Preferred  Stock:  means the Series C 6%  Cumulative
Convertible  Redeemable  Preferred Stock of the Company to be issued pursuant to
the Exchange Agreement.

                  Significant  Subsidiary:  means, at any date of determination,
any Restricted Subsidiary that, together with its Subsidiaries, (i) for the most
recent fiscal year of the Company,  accounted for more than ten percent (10%) of
the consolidated revenues of the Company and its Restricted Subsidiaries or (ii)
as of the end of such fiscal year,  was the owner of more than ten percent (10%)
of the consolidated assets of the Company and its Restricted  Subsidiaries,  all
as set forth on the most recently available consolidated financial statements of
the Company for such fiscal year.

                  Solvent:  with respect to any Person on a particular date and,
to the extent applicable, after giving effect to the borrowing hereunder on such
date and to any other Indebtedness being incurred on such date (i) the amount of
the "present fair  saleable  value" of the assets of such Person and each of its
Subsidiaries  will, as of such date,  exceed the amount of all  "liabilities  of
such Person and each of its  Subsidiaries,  contingent or otherwise," as of such
date, as such quoted terms are determined in accordance with applicable  federal
and state laws  governing  determinations  of  insolvency  of debtors,  (ii) the
present  fair  saleable  value  of the  assets  of such  Person  and each of its
Subsidiaries  will,  as of such date,  be greater  than the amount  that will be
required to pay the  liabilities of such Person and each of its  Subsidiaries on
its debts as such debts become absolute and matured,  (iii) such Person and each
of its Subsidiaries will not have as of such date, an unreasonably  small amount
of capital with which 

                                      -82-

<PAGE>

to conduct  their  business,  and (iv) such Person and each of its  Subsidiaries
will be able to pay their debts as they  mature.  For  purposes  hereof,  "debt"
means  "liability  on a claim,"  and  "claim"  means  any (x) right to  payment,
whether or nor such a right is reduced to  judgment,  liquidated,  unliquidated,
fixed, contingent,  matured, unmatured,  disputed, undisputed, legal, equitable,
secured,  or  unsecured,  or (y)  right to an  equitable  remedy  for  breach of
performance if such breach gives rise to a right to payment, whether or not such
right to an equitable remedy is reduced to judgment, fixed, contingent, matured,
unmatured, disputed, secured, or unsecured.

                  Stated Maturity: means, (i) with respect to any debt security,
the date  specified  in such debt  security as the fixed date on which the final
installment  of principal of such debt security is due and payable and (ii) with
respect to any  scheduled  installment  of  principal of or interest on any debt
security,  the date  specified in such debt  security as the fixed date on which
such installment is due and payable.

                  Stock:  means any  Conversion  Shares and any shares of Common
Stock issued subsequent to the conversion of any of the Debentures as a dividend
or other  distribution with respect to, or in exchange for or in replacement of,
the Common Stock issued upon such conversion, or resulting from a subdivision of
the  outstanding  shares of Common  Stock  issued  upon such  conversion  into a
greater number of shares by reclassification, stock splits or otherwise.

                  Subject Securities: the meaning specified in Section 5.28(a).
                  ------------------
                  Subsidiary:   means,   with   respect  to  any   Person,   any
corporation,  association  or other  business  entity of which  more than  fifty
percent  (50%) of the voting  power of the  outstanding  Voting  Stock is owned,
directly or indirectly,  by such Person or one (1) or more other Subsidiaries of
such Person. In addition,  for purposes of this Agreement,  prior to the Closing
Date the term  "Subsidiary" when used in reference to Subsidiaries of ONS, shall
also mean and include Orion Atlantic.

                  Subsidiary Guarantee: means the Guarantee substantially in the
form of Exhibit B to be executed by each of the Guarantors.

                  Successful  Launch:  means with respect to any satellite,  the
placing into orbit of such  satellite in its assigned  orbital  position with at
least forty percent (40%) of its transponder capacity fully operational.

                  Temporary Cash  Investment:  means any of the  following:  (i)
direct  obligations  of the United  States of  America or any agency  thereof or
obligations fully and unconditionally guaranteed by the United States of America
or any agency thereof,  (ii) time deposit accounts,  certificates of deposit and
money market  deposits  maturing within one hundred and eighty (180) days of the
date of acquisition thereof issued by a bank or trust company which is organized
under the laws of the United States of America, any state thereof or any foreign
country  recognized  by the United  States,  and which bank or trust company has
capital,  surplus and 

                                      -83-

<PAGE>


undivided profits  aggregating in excess of $50 million (or the foreign currency
equivalent thereof) and has outstanding debt which is rated "A" (or such similar
equivalent rating) or higher by at least one nationally  recognized  statistical
rating  organization  (as defined in Rule 436 under the  Securities  Act) or any
money-market  fund  sponsored  by a  registered  broker  dealer or  mutual  fund
distributor,  (iii)  repurchase  obligations with a term of not more than thirty
(30) days for underlying  securities of the types  described in clause (i) above
entered  into with a bank  meeting the  qualifications  described in clause (ii)
above, (iv) commercial paper,  maturing not more than ninety (90) days after the
date of  acquisition,  issued by a  corporation  (other than an Affiliate of the
Company)  organized  and in  existence  under the laws of the  United  States of
America,  any state  thereof or any  foreign  country  recognized  by the United
States of America with a rating at the time as of which any  investment  therein
is made of "P-1" (or higher) according to Moody's or "A-1" (or higher) according
to S&P, and (v)  securities  with  maturities of six (6) months or less from the
date of acquisition issued or fully and unconditionally guaranteed by any state,
commonwealth  or territory of the United States of America,  or by any political
subdivision  or  taxing  authority  thereof,  and  rated at least  "A" by S&P or
Moody's.

                  10-K: the meaning specified in Section 5.5.
                  ----
                  10-Q: the meaning specified in Section 5.5.
                  ----
                  this  Agreement:   means  this  Debenture  Purchase  Agreement
(including the annexed Schedule I and Exhibits),  as it may from time to time be
amended, supplemented or modified in accordance with its terms.

                  Trade  Payables:  means,  with  respect  to  any  Person,  any
accounts  payable or any other  indebtedness  or  monetary  obligation  to trade
creditors  created,  assumed  or  Guaranteed  by  such  Person  or  any  of  its
Subsidiaries  arising in the ordinary  course of business in connection with the
acquisition of goods or services.

                  Trading  Days:  means  (i) if the  Common  Stock is  listed or
admitted for trading on any  national  securities  exchange,  days on which such
national securities exchange is open for business or (ii) if the Common Stock is
quoted  on the  Nasdaq  National  Market  or any  similar  system  of  automated
dissemination  of quotations of securities  prices,  days on which trades may be
made on such  system or (iii) if the Common  Stock is not listed or  admitted to
trading on any  national  securities  exchange or quoted on the Nasdaq  National
Market  or  similar  system,  days on which  the  Common  Stock is traded in the
over-the-counter  market and for which a closing  bid and a closing  asked price
for the Common Stock are available.

                  Transaction Date: means, with respect to the Incurrence of any
Indebtedness by the Company or any of its Restricted Subsidiaries, the date such
Indebtedness is to be Incurred and, with respect to any Restricted Payment,  the
date such Restricted Payment is to be made.

                  Trigger Price:  shall initially mean $14.00. The Trigger Price
and any  adjustment to the Trigger Price shall be  proportionately  decreased in
the  event  the  Company  at any time  

                                      -84-

<PAGE>

subdivides (by any stock split, stock dividend,  recapitalization  or otherwise)
the  outstanding  shares of  Common  Stock  into a  greater  number of shares or
proportionately increased in the event that the Company at any time combines (by
reverse stock split,  recapitalization  or otherwise) the outstanding  shares of
Common Stock into a smaller number of shares.

                  Underlying Shares: the meaning specified in Section 11.4.
                  -----------------
                  Underwriting Agreement: the meaning specified in Section 4.1.
                  ----------------------

                  Unrestricted  Subsidiary:  means  (i)  any  Subsidiary  of the
Company that at the time of  determination  shall be designated an  Unrestricted
Subsidiary by the Board of Directors in the manner  provided  below and (ii) any
Subsidiary of an Unrestricted  Subsidiary.  The Board of Directors may designate
any  Restricted  Subsidiary  (including  any  newly  acquired  or  newly  formed
Subsidiary  of  the  Company)  to  be an  Unrestricted  Subsidiary  unless  such
Subsidiary  owns any Capital Stock of, or owns or holds any Lien on any property
of, the Company or any Restricted Subsidiary; provided that (A) any Guarantee by
the Company or any Restricted  Subsidiary of any  Indebtedness of the Subsidiary
being so designated shall be deemed an "Incurrence" of such  Indebtedness and an
"Investment"  by  the  Company  or  such  Restricted  Subsidiary  (or  both,  if
applicable) at the time of such designation; (B) either (I) the Subsidiary to be
so designated has total assets of $1,000 or less or (II) if such  Subsidiary has
assets greater than $1,000,  such  designation  would be permitted under Section
13.6 and (C) if applicable,  the Incurrence of  Indebtedness  and the Investment
referred to in clause (A) of this proviso would be permitted  under Section 13.5
and  Section  13.6.  The  Board of  Directors  may  designate  any  Unrestricted
Subsidiary to be a Restricted Subsidiary; provided that immediately after giving
effect to such  designation  (x) the Company  could  Incur  $1.00 of  additional
Indebtedness  under the first  paragraph  of Section  13.5 and (y) no  Potential
Event of Default or Event of Default shall have occurred and be continuing.  Any
such  designation  by the  Board  of  Directors  shall be  evidenced  by a Board
Resolution  giving  effect  to such  designation  and an  Officers'  Certificate
certifying that such designation complied with the foregoing provisions,  copies
of which shall be sent to each holder of Debentures.

                  Vice President:  when used with respect to the Company,  means
any vice  president,  whether or not  designated  by a number or a word or words
added before or after the title "vice president".

                  Voting Stock: means with respect to any Person,  Capital Stock
of any class or kind  ordinarily  having the power to vote for the  election  of
directors,  managers  or other  voting  members  of the  governing  body of such
Person.

                  VSAT: means very small aperture terminal.
                  ----
                  Wholly  Owned:  means,  with respect to any  Subsidiary of any
Person, the ownership of all of the outstanding Capital Stock of such Subsidiary
(other than any director's 

                                      -85-

<PAGE>

qualifying  shares or  Investments by foreign  nationals  mandated by applicable
law) by such Person or one or more Wholly Owned Subsidiaries of such Person.

         20.  Expenses.  Whether or not the  transactions  contemplated  by this
Agreement shall be consummated,  the Company will pay all expenses in connection
with such transactions and in connection with any amendments or waivers (whether
or not the same become  effective)  under or in respect of this Agreement or the
Debentures,  including,  without  limitation:  (a)  the  cost  and  expenses  of
preparing and reproducing  this Agreement and the Debentures,  of furnishing all
opinions by counsel for the Company  (including  any opinions  requested by your
special counsel as to any legal matter arising  hereunder) and all  certificates
on behalf of the Company,  and of the Company's  performance  of and  compliance
with all agreements and conditions  contained herein on its part to be performed
or complied with; (b) the cost of delivering to your principal  office,  insured
to your  satisfaction,  the Debentures  sold to you hereunder and any Debentures
delivered to you upon any substitution of Debentures or any Conversion Shares or
Interest Shares delivered  pursuant hereto or thereto and of your delivering any
Debentures,  insured to your satisfaction,  upon any substitution or conversion;
(c) the fees,  expenses and  disbursements of your U.S. special counsel (Coudert
Brothers  for BAe and  Powell,  Goldstein,  Frazer & Murphy  for Matra) and U.K.
special  counsel (Allen & Overy) to BAe in connection with all due diligence and
the  documentation  and  negotiation of the  Debentures,  this Agreement and the
exhibits  hereto  and  all  ancillary  documents  and  in  connection  with  the
completion of this transaction;  and (d) the reasonable  out-of-pocket  expenses
incurred by you in connection with this transaction.  The Company also will pay,
and will save you and each holder of any Debentures harmless from, all claims in
respect of the fees,  if any, of brokers and  finders,  other than any broker or
finder  retained by you or any such other  holder,  and any and all  liabilities
with  respect  to any taxes  (including  interest  and  penalties)  which may be
payable in respect of the execution and delivery of this Agreement and the issue
of the  Debentures  hereunder and any amendment or waiver under or in respect of
this Agreement or the Debentures.

         21. Survival.  All express  representations and warranties contained in
this  Agreement or made in writing by or on behalf of the Company in  connection
with the transactions contemplated by this Agreement shall survive the execution
and delivery of this Agreement,  any investigation at any time made by you or on
your behalf,  the  purchase of the  Debentures  hereunder,  any  disposition  or
payment of the  Debentures or any conversion of the  Debentures.  All statements
contained in any  certificate or other  instrument  delivered by or on behalf of
the Company  pursuant to this Agreement or in connection  with the  transactions
contemplated  hereby  shall be  deemed  representations  and  warranties  of the
Company under this Agreement.

         22. Amendments and Waivers.
             ----------------------
                  Prior to the Closing Date,  any term of this  Agreement may be
amended,  and the observance of any term of this  Agreement may be waived,  only
with the written consent of the Company,  ONS, BAe and Matra. From and after the
Closing Date,  any term of this  Agreement or of the  Debentures may be amended,
and the  observance of any term of this  Agreement or of the  Debentures  may be
waived (either generally or in a particular instance and either 

                                      -86-

<PAGE>


retroactively  or  prospectively),  only with the written consent of the Company
and with the written consent of the holders of at least sixty-six and two-thirds
percent  (66-2/3%)  in  principal  amount  of the then  Outstanding  Debentures;
provided,  however, that without the prior written consent of the holders of all
the then  Outstanding  Debentures,  no such amendment or waiver shall (a) extend
the fixed  maturity  or reduce  the  principal  amount of, or reduce the rate or
extend the time of payment  of  interest  on, or reduce the amount or extend the
time of payment of any  principal  or premium  (if any)  payable  (whether  as a
redemption,  a  repurchase  or  otherwise)  on any  Debenture,  (b)  reduce  the
aforesaid  percentage of the principal  amount of the  Debentures the holders of
which are required to consent to any such amendment or waiver, or (c) modify any
term of Section 14 or Section 15. Any amendment or waiver effected in accordance
with this Section 22 shall be binding  upon each holder of any  Debenture at the
time outstanding, each future holder of any Debenture and the Company.

         23. Notices.  Except as otherwise  provided in this Agreement,  notices
and other  communications  under this Agreement shall be in writing and shall be
deemed  properly  served if (i) mailed by registered or certified  mail,  return
receipt  requested,  (ii) delivered by a recognized  overnight  courier service,
(iii) delivered personally, or (iv) sent by facsimile transmission addressed (a)
if to you, at your address set forth at the beginning of this  Agreement,  or at
such other address as you shall have furnished to the Company in writing, except
as otherwise  provided in Section  17.2 with  respect to payments on  Debentures
held by you, or (b) if to any other holder of any Debenture,  at such address as
such other holder shall have furnished to the Company in writing,  or, until any
such other holder so  furnishes  an address to the  Company,  then to and at the
address of the last holder of such  Debenture who has so furnished an address to
the Company, or (c) if to the Company, at its address set forth at the beginning
of this Agreement,  to the attention of the Chief Financial Officer,  or at such
other address,  or to the attention of such other officer,  as the Company shall
have  furnished to you and each such other holder in writing.  Such notice shall
be deemed to have been  received (w) three (3) days after the date of mailing if
sent by certified or registered mail, (x) one (1) day after the date of delivery
if sent by overnight courier, (y) the date of delivery if personally  delivered,
or (z) the next succeeding business day after transmission by facsimile.

         24. Substitution of Purchasers;  References.  (a) Each of BAe and Matra
shall have the right to substitute  (in whole or in part) one (1) or more of its
Affiliates  as a purchaser of  Debentures  hereunder,  by written  notice to the
Company,  which notice shall be signed by BAe or Matra,  as the case may be, and
each such Affiliate,  shall contain each such Affiliate's  agreement to be bound
by this Agreement and shall contain a confirmation by each such Affiliate of the
accuracy with respect to it of the representations set forth in Section 6.

         (b) Wherever the word "you" is used in this Agreement,  such word shall
be deemed to refer to BAe and Matra and/or any of the Affiliates of BAe or Matra
which is or at any time becomes the holder of any Debenture.

         25.  Execution in  Counterparts.  This Agreement may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which  when so 

                                      -87-

<PAGE>


executed shall be deemed to be an original and all of which taken together shall
constitute one and the same agreement.

         26. Binding  Effect.  This Agreement shall be binding upon and inure to
the benefit of the parties hereto and their  respective  successors and assigns,
except  that the  Company  shall  not have the  right to  assign  its  rights or
obligations  hereunder or any interest herein without your prior written consent
which may be withheld for any reason.

         27.  GOVERNING LAW. THIS AGREEMENT AND THE DEBENTURES SHALL BE GOVERNED
BY, AND CONSTRUED IN ACCORDANCE  WITH,  THE LAW OF THE STATE OF NEW YORK WITHOUT
GIVING EFFECT TO ANY CONFLICT OF LAW PROVISIONS THEREOF.

         28. Consent to Jurisdiction;  Appointment of Agent to Accept Service of
Process. (a) The Company irrevocably consents and agrees, for your benefit, that
any legal action, suit or proceeding against it with respect to its obligations,
liabilities  or any  other  matter  arising  out of or in  connection  with this
Agreement or any Document or the transaction  contemplated hereby or thereby may
be  brought  in the  courts of the State of New York or the courts of the United
States of America located in The City of New York and, until all amounts due and
to become  due in respect of this  Agreement  have been paid,  or until any such
legal  action,  suit or  proceeding  commenced  prior to such  payment  has been
concluded,   hereby  irrevocably  consents  and  submits  to  the  non-exclusive
jurisdiction of each such court in personam,  generally and unconditionally with
respect  to any  action,  suit or  proceeding  for  itself and in respect of its
properties, assets and revenues.

                  (b) The Company  appoints and empowers CT Corporation  System,
with  offices  currently  at 1633  Broadway,  New York,  New York 10019,  as its
designee,  appointee and agent to receive, accept and acknowledge for and on its
behalf,  and its properties,  assets and revenues,  service of any and all legal
process,  summons,  notices and documents that may be served in any action, suit
or proceeding  brought  against it in any such United States or State court with
respect to its obligations, liabilities or any other matter arising out of or in
connection  with  this  Agreement  or any of the  Documents  or the  transaction
contemplated hereby or thereby and that may be made on such designee,  appointee
and agent in accordance with legal procedures prescribed for such courts. If for
any reason  such  designee,  appointee  and agent  hereunder  shall  cease to be
available  to act as such,  the  Company  agrees to  designate  a new  designee,
appointee and agent in The City of New York on the terms and for the purposes of
this Section 28  satisfactory  to you. The Company  further  hereby  irrevocably
consents  and  agrees  to the  service  of any and all legal  process,  summons,
notices and  documents  in any such  action,  suit or  proceeding  against it by
serving a copy thereof upon the relevant  agent for service of process  referred
to in this  Section 28 (whether or not the  appointment  of such agent shall for
any reason prove to be  ineffective  or such agent shall  accept or  acknowledge
such service) or by mailing  copies thereof by registered or certified air mail,
postage  prepaid,  to the  applicable  party  at  its  address  specified  in or
designated  pursuant to this  Agreement.  The Company agrees that the failure of
any such designee,  appointee and agent to give any notice of such service to it
shall  

                                      -88-

<PAGE>


not impair or affect in any way the  validity  of such  service or any  judgment
rendered in any action or proceeding based thereon.  Nothing herein shall in any
way be deemed to limit your  ability to serve any such legal  process,  summons,
notices and  documents in any other manner  permitted  by  applicable  law or to
obtain  jurisdiction  over such  party or bring  actions,  suits or  proceedings
against such party in such other  jurisdictions,  and in such manner,  as may be
permitted  by law,  any  objection  that they may now or  hereafter  have to the
laying of venue of any of the aforesaid  actions,  suits or proceedings  arising
out of or in connection with this Agreement brought in the United States Federal
courts  located  in The City of New York or the  courts of the State of New York
and hereby  further  irrevocably  and  unconditionally  waives and agrees not to
plead or  claim in any such  court  that  any such  action,  suit or  proceeding
brought in any such court has been brought in an inconvenient forum.

                  (c) The  provisions  of this  Section  28  shall  survive  any
termination of this Agreement, in whole or in part.

         29. WAIVER OF JURY TRIAL.  THE COMPANY  HEREBY  IRREVOCABLY  WAIVES ALL
RIGHT TO A TRIAL BY JURY IN ANY ACTION,  PROCEEDING OR COUNTERCLAIM  ARISING OUT
OF OR  RELATING TO THIS  AGREEMENT  OR ANY OTHER  DOCUMENT  OR THE  TRANSACTIONS
CONTEMPLATED HEREBY OR THEREBY.

         If you are in  agreement  with the  foregoing,  please sign the form of
acceptance on the accompanying counterparts of this Agreement and return one (1)
of the same to the Company and ONS,  whereupon  this  Agreement  shall  become a
binding agreement between you and the Company and ONS.

                                           Very truly yours,

                                           ORION NEWCO SERVICES, INC.


                                           By:
                                                  ------------------------------
                                                  Name:
                                                  Title:

                                           ORION NETWORK SYSTEMS, INC.


                                           By:
                                                  ------------------------------
                                                   Name:
                                                   Title:




                                      -89-

<PAGE>



The foregoing agreement is
hereby accepted as of
the date thereof.

BRITISH AEROSPACE HOLDINGS, INC.


By:
     --------------------------
     Name:
     Title:


MATRA MARCONI SPACE
UK LIMITED


By:
     ---------------------------
     Name:
     Title:



                                      -90-

<PAGE>



                                   SCHEDULE I

                                                         Principal Amount of
Name and Address of Purchaser                         Debentures to be Purchased
- -----------------------------                         --------------------------

BRITISH AEROSPACE HOLDINGS, INC.............................$ 50,000,000

(1)      All  payments  on  account  of the  Debentures  shall  be  made by wire
         transfer of  immediately  available  funds not later than 11 a.m.,  New
         York City time, to:

         ---------------------------------

         ---------------------------------

         ---------------------------------


(2)      All notices of such payments and written
         confirmation of such wire transfer shall be made
         to:

         ---------------------------------

         ---------------------------------

         ---------------------------------


(3)      All other communications shall be mailed to:

         ---------------------------------

         ---------------------------------

         ---------------------------------


MATRA MARCONI SPACE UK LIMITED..............................$ 10,000,000


(1)      All  payments  on  account  of the  Debentures  shall  be  made by wire
         transfer of  immediately  available  funds not later than 11 a.m.,  New
         York City time, to:

         ---------------------------------

         ---------------------------------

         ---------------------------------


<PAGE>




(2)      All notices of such payments and written
         confirmation of such wire transfer shall be made
         to:

         ---------------------------------

         ---------------------------------

         ---------------------------------


(3)      All other communications shall be mailed to:

         ---------------------------------

         ---------------------------------

         ---------------------------------




                                      -92-


                                HOGAN & HARTSON
                                     L.L.P

                                                             COLUMBIA SQUARE
                                                       555 THIRTEENTH STREET, NW
                                                       WASHINGTON, DC 20004-1109
                                                           TEL (202) 637-5600
                                                           FAX (202) 637-5910


                                January 14, 1997



Board of Directors
Orion Newco Services, Inc.
2440 Research Boulevard, Suite 400
Rockville, Maryland 20850

Gentlemen:

         This firm has acted as  counsel  to Orion  Newco  Services,  Inc.  (the
"Company"),  a  Delaware  corporation,  in  connection  with  its  registration,
pursuant  to a  registration  statement  on Form S-4  filed on or about the date
hereof (the "Registration Statement"), of 11,097,758 shares of common stock, par
value $.01 per share, of the Company, 13,871 shares of a series to be designated
Series A Preferred  Stock,  par value $.01 per share, of the Company,  and 4,298
shares of a series to be designated Series B Preferred Stock, par value $.01 per
share, of the Company (collectively,  the "Shares"), issuable to shareholders of
Orion  Network  Systems,  Inc.  ("Orion").  The  Shares  are  being  offered  in
connection with that certain merger (the "Merger") of Orion Merger Company, Inc.
("Merger  Sub"),  a newly  formed  Delaware  corporation  that is a wholly owned
subsidiary of the Company,  with and into Orion, as contemplated by the terms of
that certain  Agreement  and Plan of Merger among the Company,  Orion and Merger
Sub dated as of January 8, 1997 (the "Merger Agreement").

         This letter is furnished to you  pursuant to the  requirements  of Item
601(b)(5) of Regulation  S-K, 17 C.F.R.  ss.  229.601(b)(5),  in connection with
such registration.  For purposes of this opinion letter, we have examined copies
of the following documents:

     1.   An executed copy of the  Registration  Statement,  which  includes the
          joint proxy statement/prospectus of Orion and the Company.

     2.   The  Certificate  of  Incorporation  of the  Company,  as amended,  as
          certified  by the  Secretary of State of the State of Delaware on June
          26,  1996 and by the  Secretary  of the  Company on the date hereof as
          then being complete, accurate and in effect.

<PAGE>
HOGAN & HARTSON L.L.P.

Board of Directors
Orion Newco Services, Inc.
January 14, 1997
Page 2


     3.   The By-laws of the Company,  as amended, as certified by the Secretary
          of the Company on the date hereof as then being complete, accurate and
          in effect.

     4.   An executed copy of the Merger Agreement.

     5.   Resolutions  of the  Board of  Directors  of the  Company  adopted  on
          January 13, 1997 as certified  by the  Secretary of the Company on the
          date hereof as then being  complete,  accurate and in effect  relating
          to, among other things, approval of the Merger.

         We  have  not,  except  as  specifically  identified  above,  made  any
independent  review or investigation of factual or other matters,  including the
organization,  existence,  good  standing,  assets,  business  or affairs of the
Company or its subsidiaries.  In our examination of the aforesaid  certificates,
records, and documents,  we have assumed the genuineness of all signatures,  the
legal capacity of natural persons,  the authenticity,  accuracy and completeness
of all documents  submitted to us as originals,  and the authenticity,  accuracy
and  completeness  and conformity  with the original  documents of all documents
submitted to us as certified, telecopied,  photostatic, or reproduced copies. We
have assumed the  authenticity and accuracy of the foregoing  certifications  of
corporate  officers,  on which we are  relying,  and  have  made no  independent
investigations thereof. This opinion is given in the context of the foregoing.

         This opinion letter is based as to matters of law solely on the General
Corporation Law of the State of Delaware. We express no opinion herein as to any
other laws, statutes, regulations, or ordinances.

         Based upon,  subject to, and  limited by the  foregoing,  we are of the
opinion that following (i) approval by the  stockholders of Orion of the Merger,
and (ii)  consummation of the Merger and the issuance and delivery of the Shares
pursuant to the terms of the Merger  Agreement and the  Registration  Statement,
the Shares will be validly issued, fully paid and non-assessable.

         We assume no  obligation  to advise you of any changes in the foregoing
subsequent to the delivery of this opinion letter.  This opinion letter has been
prepared solely for your use in connection  with the filing of the  Registration
Statement  on the date of this  letter,  and should not be quoted in whole or in
part or

<PAGE>
HOGAN & HARTSON L.L.P.

Board of Directors
Orion Newco Services, Inc.
January 14, 1997
Page 3



otherwise be referred  to, nor be filed with or  furnished  to any  governmental
agency or other  person or entity,  without  the prior  written  consent of this
firm.

         We hereby  consent to the filing of this opinion  letter as Exhibit 5.0
to the Registration  Statement.  In giving this consent, we do not thereby admit
that we are an "expert"  within the meaning of the  Securities  Act of 1933,  as
amended.

                                               Very truly yours,



                                               HOGAN & HARTSON  L.L.P.










January 6, 1997




Board of Directors
Orion Network Systems, Inc.
2440 Research Boulevard, Suite 400
Rockville, Maryland 20850

Dear Directors:

This letter is in response to your  request that we provide you with our opinion
as  to  certain  of  the  Federal  income  tax   consequences  of  the  proposed
reorganization of Orion Network Systems,  Inc. ("Orion"),  Orion Newco Services,
Inc.  ("Orion  Newco"),  a newly formed  Delaware  corporation  and wholly owned
subsidiary of Orion, and Orion Merger Company, Inc. ("Orion Merger Subsidiary"),
a newly formed Delaware  corporation and wholly owned subsidiary of Orion Newco,
pursuant to the  Agreement and Plan of Merger,  dated as of December,  1996 (the
"Merger Agreement"), by and among Orion, Orion Newco and Orion Merger Subsidiary
(the "Merger").  

In rendering our opinion,  we have also considered the proposed  transfer of (i)
limited partnership interests in International Private Satellite Partners, L.P.,
a Delaware limited  partnership ("Orion Atlantic") and (ii) a portion of certain
refund  rights,  contractual  rights  and debt  instruments  under  which  Orion
Atlantic is the  obligor,  to Orion Newco in exchange  for shares of Series C 6%
Cumulative  Redeemable  Convertible Preferred Stock of Orion Newco ("Orion Newco
Series C Preferred  Stock")  pursuant to the Section (1) 351 Exchange  Agreement
and Plan of  Conversion  (the  "Exchange  Agreement"),  dated as of June , 1996,
among Orion,  Orion  Satellite  Corporation,  a Delaware  corporation  that is a
wholly owned subsidiary of Orion and the sole general partner of Orion Atlantic,
and each of the existing limited partners of Orion Atlantic other than Orion (2)
(the "Exchange").

In rendering  our opinions,  we have relied upon the facts and  representations,
summarized  below,  as they  have been  represented  to us or  described  in the
following documents (the "Documents"):

1. Agreement  and Plan of  Merger,  as  approved  by the Board of  Directors  on
   January 3, 1997;
- ----------
1
   All "Section"  references in this letter are to the Internal  Revenue Code of
   1986, as amended.
2  
   The limited partners in Orion Atlantic other than Orion are British Aerospace
   Communications,  Inc. ("BAe"), COM DEV Satellite  Communications Limited (COM
   DEV"), Kingston Communications  International Limited ("Kingston"),  Lockheed
   Martin Commercial Launch Services,  Inc. ("Lockheed Martin CLS"), MCN Sat US,
   Inc.  ("Matra"),  and Trans Atlantic Satellite,  Inc. ("Nisho").  All limited
   partnerss  except for Orion  will be taking  part in the  Exchange  and those
   partners  taking part in the Exchange will  hereinafter be referred to as the
   "Exchanging Partners".
<PAGE>







Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 2


2. The Section 351 Exchange Agreement and Plan of Conversion,  dated as of June,
   1996;
3. The  First  Amendment  to the  Section  351  Exchange  Agreement  and Plan of
   Conversion, dated as of December, 1996;
4. The  Proposed  Amendment  to  Preliminary  Schedule  14A as  filed  with  the
   Securities  and  Exchange   Commission  on  December  30,  1996  (the  "Proxy
   Statement"); and
6. The letter  dated  December  27,  1996 from  management  of Orion  containing
   certain representations regarding the Merger (the "Representation Letter").

The  management of Orion has  represented  to us that the  Documents  provide an
accurate,  true,  and complete  description of the entire  understanding  of the
parties with respect to the subject  matter thereof and are true and complete in
all material  respects.  Also, the management of Orion has represented  (without
our independent investigation) that the Merger and Exchange and any transactions
incident  thereto  will  occur  in  strict  accordance  with  the  terms  of the
Documents.  We have made no independent  determination  regarding such facts and
circumstances   and,   therefore,   have   relied   upon  the   statements   and
representations of management and the information presented in the Documents for
purposes of this letter. Any changes to the Documents or to such facts or to the
assumptions set forth in this letter may affect the opinions stated herein.

I.       STATEMENT OF FACTS

The management of Orion has represented the following to us:

         A.       In General

Orion, together with its subsidiaries, is a provider of private network services
to  multinational  corporations.  More  specifically,  Orion has  developed  and
operates a privately  owned  international  satellite  communications  business,
which  delivers  two  distinct  types of  services:  (i) private  communications
networks for multinational  businesses and (ii) transmission  capacity for video
and other program distribution services.

As of December 15, 1996,  Orion's capital structure  consisted of (i) 40,000,000
authorized shares of voting common stock, 10,974,121 shares of which were issued
and outstanding,  (ii) 15,000 authorized shares of convertible redeemable Series
A  Preferred  Stock,  13,871  shares of which  were  outstanding  and  currently
entitled to vote on the election of directors and all other  matters  proper for
shareholder  consideration  on an  "as  converted"  basis,(3)  and  (iii)  5,000
authorized shares of convertible  redeemable Series B Preferred Stock,  4,298 of
which were outstanding and

- ---------
3 
   Each share of the Series A Preferred  stock  entitles its holder to 117 votes
   because  each share of the Series A Preferred  can be converted to 117 shares
   of  common  stock.  Thus,  the  outstanding  shares  of  Series  A  preferred
   constitute an aggregate of 1,622,907 votes.

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 3

currently  entitled to vote on the election of directors  and all other  matters
proper  for  shareholder  consideration  on an "as  converted"  basis.(4)  As of
September 30, 1996, there are only 6 shareholders who beneficially own more than
five percent of the outstanding common stock of Orion. The Orion common stock is
traded over-the-counter and quoted on the NASDAQ System.


Orion is the  common  parent of an  affiliated  group of  corporations  filing a
consolidated  Federal  income tax return on the basis of a December  31 year end
("Orion Group").  Other members of the Orion Group include:  Orion Newco;  Orion
Merger Subsidiary; Asia Pacific Space & Communications, Ltd.; Orion Asia Pacific
Corp.  ("Orion Asia  Pacific")(5);  Orion  Satellite  Corporation  ("OrionSat");
OrionNet, Inc. ("OrionNet"); and OrionNet Finance Corporation.

Orion Newco is currently a  wholly-owned  subsidiary  of Orion.  Orion Newco was
formed  solely for the purpose of effecting  the Merger and Exchange and has not
conducted any business since  incorporation  other than matters  incident to its
organization   and  matters  incident  to  the  Merger  Agreement  and  Exchange
Agreement.  While Orion Newco currently conducts no business, upon completion of
the Merger as described  below, its business  activities will initially  include
the operations  currently  conducted by Orion.  The authorized  capital stock of
Orion Newco  consists of 40,000,000  shares of common stock,  par value $.01 per
share, and 1,000,000  shares of preferred stock, par value $.01 per share.  Each
holder of Orion  Newco  common  stock is entitled to one vote per share of Orion
Newco  common  stock held by such  holder on all matters to be voted upon by the
stockholders of Orion Newco.  The holders of Orion Newco preferred stock will be
entitled to one vote for each whole share of Orion Newco common stock that would
be issuable upon  conversion of such share of Orion Newco preferred stock on all
matters  submitted to the  stockholders  of Orion Newco.  Immediately  after the
Merger and  Exchange,  Orion Newco will have  outstanding  10,973,018  shares of
Orion Newco common stock, 13,871 shares of Orion Newco Series A Preferred Stock,
4,298  shares of Orion Newco  Series B Preferred  Stock,  and 121,988  shares of
Orion  Newco  Series C Preferred  Stock  (subject  to  possible  adjustment,  as
discussed below). The terms,  rights and preferences of the Orion Newco Series A
Preferred  and Orion Newco Series B Preferred  will be identical in all respects
to the terms,  rights and  preferences  of the Series A Preferred  Stock and the
Orion Series B Preferred Stock, respectively.

- ----------
4
   Each share of the Series B  Preferred  stock  entitles  it holder to 98 votes
   because each share of the Series B Preferred can be converted to 98 shares of
   common stock. Thus, the outstanding  shares of Series A preferred  constitute
   an aggregate of 421,204 votes.
5
   Presently,  Orion owns  approximately  83% of the total  outstanding stock of
   Orion Asia Pacific.  As noted below,  as a condition to the  Exchange,  Orion
   Newco will issue  approximately  86,000 shares of common stock to acquire the
   remaining  outstanding  shares of stock of Asia Pacific  which are  currently
   owned by an affiliate of BAe.

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 4


Orion Merger  Subsidiary  was  organized  solely for the purpose of merging with
Orion in  accordance  with the Merger  Agreement.  Orion Merger  Subsidiary  has
engaged  in  no  business   activities   other  than  matters  incident  to  its
organization   and  matters  incident  to  the  Merger  Agreement  and  Exchange
Agreement.  The authorized capital stock of Orion Merger Subsidiary  consists of
1,000  shares of common  stock.  Immediately  before the Merger of Orion  Merger
Subsidiary with and into Orion,  Orion Merger  Subsidiary's  assets will consist
solely  of cash  contributed  by  Orion  Newco  in  exchange  for  Orion  Merger
Subsidiary's stock.  Immediately after the Merger,  Orion Newco will be the sole
shareholder  of Orion,  owning  100% of the  issued  and  outstanding  shares of
Orion's common and preferred stock.

OrionSat  is the sole  general  partner  of  Orion  Atlantic  with a 25%  equity
interest.  The  limited  partners  in  Orion  Atlantic  include  Orion  and  the
Exchanging Partners.


         B.       Business Purpose

Management has represented  that the proposed Merger will permit the acquisition
of the LPIs and  Partnership  Debt  (hereinafter  defined)  in that,  absent the
formation  of Orion  Newco,  Exchanging  Partners  owning  significant  LPIs and
Partnership  Debt have indicated they are not willing to exchange their LPIs and
Partnership Debt for Orion stock. Accordingly, the Merger has been structured to
accommodate  the wishes of the  Exchanging  Partners and permit Orion to acquire
all the capital and profits  interests in Orion Atlantic not presently  owned by
the Orion Group.

In addition,  the Proxy  states that the Merger and the Exchange  (collectively,
the "Transactions") will provide the following additional benefits: (i) simplify
Orion's  organizational  structure  and  improve  Orion's  access to the capital
markets;  (ii)  consolidate  outside  investor  ownership at the holding company
(Orion Newco) level;  (iii) improve the speed and efficiency of Orion's decision
making;  (iv)  provide  Orion Newco with 100%  ownership  of all of its material
subsidiaries;  (v) allow Orion Newco to pursue  independently its business plans
and financing for all of its  satellites;  (vi) eliminate (in exchange for Orion
Newco  Stock)  approximately  $37.5  million  (as  of  September  30,  1996)  of
obligations  Orion  Atlantic  owes  to the  Exchanging  Partners  under  various
agreements; and (vii) increase Orion's overall market capitalization.

Access to the capital  markets is  necessary  for Orion to achieve its  business
plan to construct and launch two additional satellites.  With this plan in mind,
Orion Newco has been  pursuing  and will  continue to pursue  various  financing
transactions including: (i) an offering of investment units consisting of senior
notes and common stock  warrants in the amount of  approximately  $322  million;
(ii) the  issuance  and  sale of  approximately  $60  million  of Orion  Newco's
convertible  subordinated  debentures  to  BAe  and  Matra;  (iii)  a  satellite
procurement contract for the Orion 2 Satellite; and (iv) a satellite procurement
contract for the Orion 3 Satellite.  Orion  believes that the  construction  and
launch of Orion 2 and Orion 3 will offer  stockholders an opportunity to 


<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 5



realize  long-term  value  through the  potential  appreciation  in the value of
Orion's stock. The Proxy states that Orion believes that it would not be able to
complete these financings in the absence of the Transactions.

              C. Merger


Pursuant to the Merger,  (i) Orion  Merger  Subsidiary  will merge with and into
Orion as provided in the relevant  provisions  of the Delaware  merger  statute,
with  Orion  being  the  surviving   corporation  and  Orion  Merger  Subsidiary
disappearing in connection with the Merger,  and (ii) each share of common stock
of Orion outstanding  immediately prior to the effective date of the Merger will
be  automatically  canceled and  converted by operation of law into one share of
Orion Newco Common  Stock.  In addition,  each share of Orion Series A Preferred
Stock and Series B Preferred  Stock will be canceled and  converted by operation
of law into one share of Orion  Newco  Series A  Preferred  Stock  and  Series B
Preferred  Stock,  respectively,  having  the same terms as the  canceled  Orion
preferred stock. The shares of Orion Newco stock originally issued to Orion will
be canceled. Each share of Orion Merger Subsidiary common stock will be canceled
and converted into one share of Orion common stock, which shall not be converted
into Orion Newco common stock.  Following consummation of the Merger, Orion will
be a  wholly-owned  subsidiary  of Orion Newco and the Orion  shareholders  will
automatically  become holders of all of the outstanding  stock of Orion Newco in
the same proportion of ownership that they had in Orion.  Any outstanding  stock
options which Orion may have granted pursuant to its stock option plans shall be
assumed by Orion  Newco and will  become  stock  options of Orion Newco upon the
same terms as applied prior to the Merger.

According to the Proxy Statement, the Merger, if approved, will become effective
upon the filing with the  Delaware  Secretary  of State of the  Delaware  Merger
Certificate,  which is expected to occur following  approval of the Transactions
by the requisite vote of the Orion  stockholders,  and satisfaction or waiver of
the  other  conditions  set  forth  in the  Merger  Agreement  and the  Exchange
Agreement (the "Effective Time of the Merger").

According to the Proxy Statement,  it is expected that approximately  10,974,121
shares of Orion  Newco  Common  Stock,  13,871  shares of Orion  Newco  Series A
Preferred  Stock,  and 4,298 shares of Orion Newco Series B Preferred Stock will
be issued to the  stockholders  of Orion in the  Merger  in  exchange  for their
shares of Orion Common Stock,  Orion Series A Preferred Stock and Orion Series B
Preferred  Stock,   respectively.   Orion  Newco  will  have  a  certificate  of
incorporation,  bylaws,  capital  structure  (before the issuance of Orion Newco
Series C Preferred Stock, as discussed in D. below) and management substantially
identical in all material respects to those of Orion. As a result of the Merger,
the stockholders of Orion Newco will have  substantially the same securities and
rights in Orion  Newco  that they had in Orion,  except  that  their  percentage
ownership of Orion Newco will be diluted as a result of the Exchange  (discussed
immediately  below).  The  Proxy  states  that  Orion  stockholders  will not be
entitled to appraisal 

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 6


rights in connection with the approval of the Merger.

         D.       Exchange

Pursuant to the terms of the Exchange  Agreement,  and subject to and  effective
upon the  consummation  of the Merger,  Orion Newco will issue 121,988 shares of
Series C 6% Cumulative Redeemable  Convertible Preferred Stock (the "Orion Newco
Series C Preferred Stock") to the Exchanging Partners. In exchange for the Orion
Newco Series C Preferred Stock,  the Exchanging  Partners will transfer to Orion
Atlantic the following  rights  currently held by the Exchanging  Partners:  (i)
their  respective  limited  partnership  interests  in Orion  Atlantic and other
rights and  obligations  relating  thereto under the Second Amended and Restated
Partnership  Agreement of International  Private Satellite  Partners,  L.P. (the
"LPIs");  (ii)  all of  the  rights  and  obligations  held  by  certain  of the
Exchanging  Partners  under the  Refund  Agreement,  dated  December  31,  1994,
consisting  primarily  of rights to receive  an  aggregate  of $26.7  million of
refunds  thereunder;  (iii) all the rights of BAe, COM DEV,  Kingston,  Lockheed
Martin CLS and Matra under the Preferred  Participating Unit Agreements ("PPUA")
among OrionSat and such Exchanging  Partners,  consisting primarily of rights to
receive  repayment of $6.6 million advanced  thereunder and  approximately  $4.3
million  of  interest  accrued  on such  advances;  (iv)  all of the  Exchanging
Partners' rights under the Preferred Bidders  Agreement  consisting of preferred
bidder  status  with  respect to  procurement  contracts  entered  into by Orion
Atlantic;  and (v) certain of the Exchanging Partners' rights under a variety of
other agreements  between or among Orion Atlantic and the Limited Partners.  The
contractual and refund rights referred to in clauses (ii),  (iii),  (iv) and (v)
of the  preceding  sentence  are  collectively  referred to as the  "Partnership
Debt."

Pursuant to the Exchange,  Orion Newco will transfer to the Exchanging  Partners
the following number of shares of Orion Newco Series C Preferred Stock:

                  Exchanging Partner                Number of Shares
          BAe                                             50,129
          COM DEV                                          9,462
          Kingston                                        11,198
          Lockheed Martin CLS                             19,534
          Matra                                           17,727
          Nissho                                          13,938
                                              ------------------
                                                         121,988
                                              ==================


The above number of shares will be increased by an amount  pursuant to a formula
based upon payments by the  Exchanging  Partners under various  agreements,  and
adjusted  proportionately  to  reflect  any  subdivision,   stock  split,  stock
dividend, recapitalization,  combination or reverse stock 

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 7



split of Orion capital stock or similar transaction by Orion between the date of
the Exchange Agreement (June, 1996) and the consummation of the Exchange.

As a result of the  Exchange,  the Orion  Group will become the owner of all the
LPIs in Orion Atlantic  (through  Orion Newco and Orion as limited  partners and
OrionSat  as  the  sole  general  partner  of  Orion  Atlantic)  and  all of the
Partnership Debt.

The Series C Preferred  Stock will be entitled to receive  dividends at the rate
of 6% per annum,  payable exclusively in Orion Newco Common Stock. Each share of
Series C Preferred Stock will have a liquidation  preference of $1,000 per share
(plus all accrued and unpaid  dividends) over the Orion Newco Common Stock.  The
holders of the Orion Newco Series C Preferred  Stock will be entitled to vote on
the basis of one vote for each  whole  share of Orion  Newco  Common  Stock that
would  be  issuable  upon  conversion  of such  share of  Orion  Newco  Series C
Preferred  Stock at the time the vote is taken.  Orion  Newco will redeem all of
the Orion Newco Series C Preferred  Stock on the 25th  anniversary  of issuance,
2022. Additionally,  at any time after the second anniversary of the date of the
issuance  of  the  Orion  Newco  Series  C  Preferred  Stock  (or,  if  earlier,
immediately  prior to the consummation of any  consolidation,  merger or sale in
which the  successor  entity or  purchasing  entity is other than Orion  Newco),
Orion  Newco has the option to redeem the Orion Newco  Series C Preferred  Stock
(in whole or in part) at a price of $1,000 per share plus all accrued and unpaid
dividends. Holders of the Orion Newco Series C Preferred Stock have the right to
convert  their  shares  into a number  of  shares of Orion  Newco  Common  Stock
generally  equal to a number  computed  by  multiplying  the number of shares of
Orion Newco Series C Preferred Stock to be converted by $1,000, and dividing the
result  by the  applicable  Conversion  Price  (as  such  term  is  used  in the
Certificate of  Designations),  initially  $17.50,  subject to  adjustment.  The
121,988 shares of Orion Newco Series C Preferred  Stock expected to be issued in
the Exchange will be convertible into approximately  7,933,319 million shares of
Orion Newco  Common  Stock.  Finally,  if the  closing  price of the Orion Newco
Common  Stock over 20 of the 30 prior  trading  days is greater than or equal to
the conversion price of $17.50 (subject to adjustment),  Orion Newco may require
the conversion of all of the  outstanding  Orion Newco Series C Preferred  Stock
into Orion Newco Stock.

Section 3.2(c) of the Exchange  Agreement  provides that the number of shares of
Orion Newco Series C Preferred Stock will be increased by the Adjustment Amount.
The  Adjustment  Amount for an Exchanging  Partner will equal (i) the sum of (A)
the amounts  paid by such  Exchanging  Partner for  obligations  pursuant to the
Capacity  Agreement  which  are  subject  to being  refunded  under  the  Refund
Agreement,  and the  amounts  paid by such  Exchanging  Partner  pursuant to the
Contingent Capacity  Agreement,  during the period from July 1, 1996 through the
Closing  Date (as  defined in the  Exchange  Agreement),  plus (B) the amount of
interest  accrued  with  respect to funds  advanced by such  Exchanging  Partner
pursuant to the PPU  Agreement,  minus (ii) the product of the number of days in
the Adjustment  Period through and including (but not beyond)  January 29, 1997,
multiplied by the Tax Adjustment Factor for such Exchanging Partner,  

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 8


divided by (iii)  $1,000.  The Tax  Adjustment  means,  with respect to (i) BAe,
$11,634;  (ii) COM DEV, $1,940;  (iii) Kingston,  $1,940;  (iv) Lockheed Martin,
$3,878; (v) MCN Sat, $3,878; and (vi) TA Sat, $3,878.

The First  Amendment to Section 351 Exchange  Agreement  and Plan of  Conversion
("First  Amendment") amended Section 3.2(c) of the Exchange Agreement to provide
that if the Closing Date for the Exchange  occurs after  January 29, 1997,  then
any payments made by the  Exchanging  Partners which are subject to refund under
the  Refund  Agreement  and any  payments  made  under the  Contingent  Capacity
Agreements  will be refunded to the Exchanging  Partners to the extent  proceeds
from the Bond Offering  contemplated  by the Exchange  Agreement  plus the gross
proceeds from the sale of convertible  subordinated debentures to BAe and Matra,
exceed the sum of: (i) the amount  necessary to refinance  the credit  facility;
(ii) $49.4 million payments to be made by Orion or Orion Newco under the Orion 2
Satellite  Contract;  (iii) $13  million  incentive  payments  payable  to Matra
immediately following the refinancing of the credit facility;  (iv) $3.5 million
payable to STET  immediately  following the refinancing of the credit  facility;
(v)  reasonably  amount  necessary for working  capital;  and (vi) the costs and
expenses of the Bond Offering, the convertible subordinated debenture financings
and related  transactions.  If such excess is not  sufficient to refund all such
post-closing  payments  in  full,  the  excess  will be  used  first  to  refund
Contingent Capacity Payments,  and second to refund Firm Capacity Payments.  Any
funds then  remaining will be used to make partial  refunds,  pro rata among the
Exchanging Partners in proportion to their respective post-closing payments. Any
amounts so refunded will not be taken into account in  determining  any required
adjustment described in the preceding paragraph.


         E.       Mutual Interdependence of Exchange and Merger

The Proxy  requests the  shareholders  of Orion to consider and vote  separately
upon the Merger and the Exchange. However, the Proxy states that the Exchange is
a condition to the  completion  of the Merger,  and the Merger is a condition to
the completion of the Exchange, as provided in the Merger Agreement and Exchange
Agreement.  In addition, as is set forth in the Proxy Statement,  the Merger and
Exchange are  pursuant to the same plan,  and the Merger is  undertaken  for the
principal  purpose of enabling  Orion to acquire the LPIs and  Partnership  Debt
pursuant to the Exchange.

 II. REPRESENTATIONS

Set  forth  below  are   representations   made  by  the   management  of  Orion
("Management")  on which we have relied in concluding that the Merger  satisfies
the  requirements of Section  368(a)(2)(E)  of the Internal  Revenue of 1986, as
amended (the "Code"):

1.  The Merger of Orion Merger  Subsidiary  with and into Orion will satisfy all
    of the


<PAGE>




Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                               Page 9

    requirements  for treatment as a statutory merger under applicable state law
    and regulations thereunder, and as a consequence of the Merger, Orion Merger
    Subsidiary will disappear and Orion will be the surviving  corporation  with
    its charter intact.

2.  The fair market  value of the Orion Newco stock to be received by each Orion
    shareholder  will be equal  to the fair  market  value  of the  Orion  stock
    surrendered in the Merger.

3.  Upon  consummation of the Merger,  certificates  evidencing Orion stock will
    represent, by operation of law, the same number and class of shares of Orion
    Newco  stock and will no longer  represent  a direct  ownership  interest in
    Orion.

4.  There is no plan or intention by the shareholders of Orion who own (directly
    or  indirectly,  such as by  reason of the  ownership  of stock  options  or
    convertible preferred stock) five percent or more of the Orion common stock,
    and, to the best of Orion  management's  knowledge  and belief,  there is no
    plan or intention on the part of the  remaining  shareholders  of Orion,  to
    sell, exchange, or otherwise dispose of (or enter into any other arrangement
    designed to limit the appreciation in value of, or risk of loss with respect
    to) a number of shares of Orion Newco stock received in the transaction that
    would reduce the shareholders' ownership of Orion Newco stock to a number of
    shares having a fair market value,  as of the Effective  Time of the Merger,
    of less  than 50  percent  of the  total  fair  market  value  of all of the
    formerly  outstanding  common  and  preferred  stock of Orion as of the same
    date.  Moreover,  shares of Orion stock and shares of Orion Newco stock held
    by Orion shareholders and otherwise sold, redeemed,  or disposed of prior to
    or  subsequent  to the Merger  which are part of the plan of Merger  will be
    considered in making this representation.

5.  Following the Merger, Orion will hold at least 90 percent of the fair market
    value of its net 2. assets and at least 70 percent of the fair market  value
    of its gross  assets  and at least 90 percent  of the fair  market  value of
    Orion Merger Subsidiary's net assets and 70 percent of the fair market value
    of Orion  Merger  Subsidiary's  gross assets held  immediately  prior to the
    Merger. For purposes of this representation,  amounts (if any) paid by Orion
    or Orion Merger  Subsidiary  to  dissenters,  amounts paid by Orion or Orion
    Merger  Subsidiary  to  shareholders  who  receive  cash or other  property,
    amounts  used by Orion  or Orion  Merger  Subsidiary  to pay  reorganization
    expenses, and all redemptions and distributions (except for regular,  normal
    dividends) made by Orion will be included as assets of Orion or Orion Merger
    Subsidiary, respectively, immediately prior to the Merger.

6.  Prior  to the  Merger,  Orion  Newco  will be in  control  of  Orion  Merger
    Subsidiary within the meaning of Section 368(c) of the Code.

7.  Orion Newco was formed  solely for the purpose of  effecting  the Merger and
    has not

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 10

    conducted any business since  incorporation  other than matters  incident to
    its  organization  and matters incident to the Merger Agreement and Exchange
    Agreement.

8.  Following  the Merger,  Orion Newco will own all the issued and  outstanding
    stock of Orion. Orion has no plan or intention to issue additional shares of
    its stock that would  result in Orion Newco  losing  control of Orion within
    the meaning of Section 368(c) of the Code.

9.  Orion Newco has no plan or intention to redeem or otherwise reacquire any of
    its stock issued in the Merger.

10. Orion  Newco will  remain in  existence.  There is no plan or  intention  to
    liquidate   Orion  Newco;   to  merge  Orion  Newco  with  or  into  another
    corporation;  or to cause Orion Newco to sell or otherwise dispose of any of
    its assets or of any of the assets  acquired  from Orion Merger  Subsidiary,
    except for dispositions made in the ordinary course of business or transfers
    of assets to a corporation controlled by Orion.

11. There is no plan or  intention  on the part of Orion,  Orion  Newco,  or any
    other  person  to  liquidate  Orion;  to merge  Orion  with or into  another
    corporation; to sell or otherwise dispose of the stock of Orion; or to cause
    Orion to sell or  otherwise  dispose  of any of its  assets or of any of the
    assets acquired from Orion Merger  Subsidiary,  except for dispositions made
    in the ordinary  course of business or transfers of assets to a  corporation
    controlled by Orion.

12. No holder of any  issued or  outstanding  Orion  stock will be  entitled  to
    exercise  dissenters'  or appraisal  rights in  connection  with the Merger;
    rather,  the only  consideration  any Orion  stockholder will be entitled to
    receive in connection with the Merger will be shares of Orion Newco stock.

13. Orion Merger Subsidiary was organized solely for the purpose of merging with
    Orion in accordance with the Merger  Agreement and Exchange  Agreement,  and
    has engaged in no 2. business  activities other than matters incident to its
    organization  and matters  incident  to the Merger  Agreement  and  Exchange
    Agreement.

14. Orion Merger Subsidiary will have no liabilities  assumed by Orion, and will
    not transfer to Orion any assets subject to liabilities, in the Merger.

15. Following  the Merger,  Orion will  continue its historic  business or use a
    significant portion of its historic business assets in a business.

16. Orion Newco, Orion Merger  Subsidiary,  Orion, and the shareholders of Orion
    will pay their respective expenses,  if any, incurred in connection with the
    Merger.

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 11



17. There is no  intercorporate  indebtedness  existing  between Orion Newco and
    Orion or  between  Orion  Merger  Subsidiary  and  Orion  that  was  issued,
    acquired, or will be settled at a discount.

18. Each class of issued and outstanding  stock of Orion currently  entitles its
    holders  to vote in the  election  of  directors  of Orion  and on all other
    matters  that are  subject  to  shareholder  approval  under the  applicable
    provisions  of Delaware  corporate  law,  and there is no class of nonvoting
    stock of Orion  that is or will be issued and  outstanding  on or before the
    date of the Merger.  Taking into account any shares of Orion stock  acquired
    by Orion or Orion Newco for  consideration  other than voting stock of Orion
    Newco,  Orion  Newco will  acquire at least 80% of the total  shares of each
    class of Orion stock solely in exchange for shares of Orion Newco stock that
    currently entitles its holders to vote in the election of directors of Orion
    Newco and on all other  matters  that are  subject to  shareholder  approval
    under the applicable  provisions of Delaware  corporate law. Orion Newco has
    no plan or intention  to modify any of the voting  rights or other terms and
    provisions of any class of Orion Newco stock issued pursuant to the Merger.

19. At the time of the Merger,  Orion will not have  outstanding  any  warrants,
    options,  convertible  securities,  or any other type of right  pursuant  to
    which any person  could  acquire  stock in Orion and that,  if  exercised or
    converted, would affect Orion Newco's acquisition or retention of control of
    Orion, as defined in Section 368(c) of the Code.


20. Orion Newco does not own, nor has it owned  during the past five years,  any
    shares of the stock of Orion.

21. No two parties to the  transaction  are  investment  companies as defined in
    Section 368(a)(2)(F)(iii) and (iv) of the Code.

22. Orion is not under the jurisdiction of a court in a Title 11 or similar case
    within the meaning of Section 368(a)(3)(A) of the Code.


23. The facts and representations relating to the Transactions described in this
    opinion  letter and the  Documents  are true,  correct,  and complete in all
    material respects.



<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 12




III.   ANALYSIS


         A.       Statutory Requirements

Section 368(a)(1)(A) of the Code provides that the term "reorganization" means a
statutory merger or consolidation.  Management has represented that the proposed
merger  of Orion  Merger  Subsidiary  with  and into  Orion  will  qualify  as a
statutory merger under the applicable  state law. Based on this  representation,
this requirement will be met.

Section  368(a)(2)(E)  of the Code provides that a transaction  which  otherwise
qualifies under Section  368(a)(1)(A)  will not be disqualified by reason of the
fact that stock of a corporation (the  "controlling  corporation")  which before
the merger was in control of the merged  corporation is used in the transaction,
if:

         (i)      After the  transaction,  the corporation  surviving the merger
                  holds   substantially  all  of  the  surviving   corporation's
                  properties  and  substantially  all of the  properties  of the
                  merged  corporation  (other  than  stock  of  the  controlling
                  corporation distributed in the transaction); and

         (ii)     In the  transaction,  former  shareholders  of  the  surviving
                  corporation  exchange,  for an amount  of voting  stock of the
                  controlling  corporation,  an amount of stock in the surviving
                  corporation which constitutes control of such corporation.

Section  1.368-2(j)(3)(iii)  of the Income  Tax  Regulations  ("Regulations"  or
"Treas.  Reg.")  provides  that for purposes of Section  368(a)(2)(E)(i)  of the
Code,  the  term  "substantially  all"  has the same  meaning  as under  Section
368(a)(1)(C).  Rev.  Proc.  77-37,  1977-2 C.B. 568,  provides that, for advance
ruling purposes, the "substantially all" requirement of Section  368(a)(2)(E)(i)
is satisfied if there is a retention of assets  representing at least 90 percent
of the fair  market  value of the net assets and at least 70 percent of the fair
market value of the gross assets held by the surviving  corporation  immediately
prior to the  transfer.  (This amount of assets of the merged  corporation  must
also be  transferred to and retained by the surviving  corporation.)  Management
has represented  that after the Merger,  Orion will hold assets  representing at
least 90  percent of the fair  market  value of the net assets and 70 percent of
the  gross  assets  of  Orion  and  Orion  Merger  Subsidiary.   Based  on  this
representation, the "substantially all" requirement will be met.

For purposes of Section  368(a)(2)(E) of the Code, the term "control" is defined
in Section  368(c) as ownership of stock  possessing  at least 80 percent of the
total  combined  voting  power of all  classes of stock  entitled to vote and at
least 80 percent of the total number of shares of all other  

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 13


classes  of stock  of the  corporation.  Pursuant  to the  terms  of the  Merger
Agreement,  prior to the merger of Orion Merger  Subsidiary with and into Orion,
Orion  Newco will own all of the issued and  outstanding  stock of Orion  Merger
Subsidiary.  Consequently,  Orion  Newco  will  be  in  control  of  Orion  and,
therefore,  will be the "controlling  corporation" within the meaning of Section
368(a)(2)(E).

Finally, as discussed above,  "control" for purposes of Section  368(a)(2)(E) is
defined in Section  368(c) as ownership of stock  possessing at least 80 percent
of the total combined  voting power of all classes of stock entitled to vote and
at least 80 percent of the total number of shares of all other  classes of stock
of the corporation.  Pursuant to the Merger Agreement, the existing shareholders
of Orion will exchange Orion stock  possessing more than 80% of the voting power
of all  classes  of  Orion  voting  stock  (which  constitutes  all  of  Orion's
outstanding stock) solely for voting stock of Orion Newco. Therefore,  the Orion
stock that is  converted  into Orion Newco stock upon the merger of Orion Merger
Subsidiary  with and into Orion  will  constitute  control of Orion  immediately
before the Merger within the meaning of Section 368(a)(2)(E)(ii).

The IRS has  published a ruling  which  analyzes  the  applicability  of Section
368(a)(2)(E) of the Code to a situation  similar to the proposed Merger. In Rev.
Rul. 77-428, 1977-2 C.B. 117, corporation P formed a subsidiary corporation, S1,
which in turn formed subsidiary corporation S2. Pursuant to a plan of merger, S2
merged with and into P, with P being the surviving  corporation.  On the date of
the merger all  outstanding  shares of P stock not held by S1 were exchanged for
shares of S1  stock.  Thus,  P became a wholly  owned  subsidiary  of S1 and the
former P shareholders became the shareholders of S1. The IRS held that the above
described   merger  qualified  as  a  tax-free   reorganization   under  Section
368(a)(2)(E), even though the two subsidiaries were newly organized corporations
and a related  corporation was acquired in the  transaction.  As noted,  this is
similar to the plan  contemplated  by the parties to the proposed  Merger,  with
Orion acting as P, Orion Newco acting as S1, and Orion Merger  Subsidiary acting
as S2.

Based  on the  above,  so long as the  continuity  of  interest,  continuity  of
business  enterprise,  and  business  purpose  requirements  are  satisfied,  as
discussed under "Nonstatutory  Requirements"  immediately below, the Merger will
qualify as a reorganization  under Section 368(a)(1)(A) of the Code by reason of
368(a)(2)(E).(6)

         B.       Nonstatutory Requirements

- ----------
6
   In addition to satisfying the requirements of Section 368(a)(2)(E), (i) there
   appear to be good arguments that the Merger will constitute a  reorganization
   described in Section  368(a)(1)(B),  and (ii) when  considered in conjunction
   with the Exchange,  in the Merger of Orion stock for Orion Newco stock should
   qualify for nonrecognition treatment under Section 351(a).

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 14

Sections 1.368-1(b) and 1.368-2(g) of the Regulations provide that the following
additional  requirements  must  be  met  for  a  transaction  to  qualify  as  a
reorganization within the meaning of Section 368:

         (i)      "Continuity of interest" must be present;

         (ii)     "Continuity of business enterprise" must exist; and


         (iii)    The transaction  must be undertaken for reasons  pertaining to
                  the  continuance  of the business of a corporation  which is a
                  party to the transaction.

Continuity  of Interest.  Qualification  of a  transaction  as a  reorganization
requires  that  the  former  shareholders  of the  acquired  corporation  have a
continuing proprietary interest in the acquiring corporation.  Rev. Proc. 77-37,
1977-2 C.B.  568,  provides that the  "continuity  of interest"  requirement  of
Section 1.368-1(b) of the Regulations is satisfied in a transaction described in
Section  368(a)(1)(A) of the Code by reason of Section  368(a)(2)(E) if there is
continuing  interest  through stock ownership in the controlling  corporation on
the part of the former shareholders of the surviving  corporation which is equal
in value, as of the effective date of the reorganization, to at least 50 percent
of the  value  of  all  of  the  formerly  outstanding  stock  of the  surviving
corporation as of that date. Sales, redemptions, and other dispositions of stock
occurring  prior or  subsequent  to the  exchange  which are part of the plan of
reorganization,  will be considered in determining whether there is a 50 percent
continuing  interest  through stock  ownership as of the  effective  date of the
reorganization.  Management has  represented  that the 50 percent  continuity of
interest  test of Rev.  Proc.  77-37  will be met in the  Merger.  Based on this
representation, the Merger will satisfy the continuity of interest requirement.

Continuity  of  Business  Enterprise.  Section  1.368-1(b)  of  the  Regulations
provides  that a  continuity  of business  enterprise  [as  described in Section
1.368-1(d)  of  the  Regulations]  is  requisite  to a  reorganization.  Section
1.368-1(d) of the Regulations  provides that  continuity of business  enterprise
requires  that the  acquiring  corporation  either  (i)  continue  the  acquired
corporation's  historic  business,  or (ii)  use a  significant  portion  of the
acquired corporation's historic assets in a business. Management has represented
that  Orion will  continue  to be engaged  in the same  business  following  the
Merger. Based on this representation,  the Merger will satisfy the continuity of
business enterprise requirement.

Business  Purpose.  Section  1.368-2(g)  of  the  Regulations  provides  that  a
reorganization  must be undertaken for reasons germane to the continuance of the
business  of a  corporation,  a  party  to the  reorganization.  Management  has
represented  that the Merger will  substantially  benefit the  business of Orion
Atlantic  and  Orion  in  various  ways  (see  I.B.  above).   Based  upon  such
representations,  the Merger will satisfy the business  purpose  requirements of
Section 1.368-2(g) of the Regulations.

<PAGE>
Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 15


         C.       Additional Statutory and Regulatory Provisions

Section 358(a)(1) of the Code generally provides that in the case of an exchange
to which Section 351 or 354 applies,  the basis of the property  permitted to be
received  without the  recognition  of gain or loss shall be the same as that of
the property exchanged.

Section  1223(1) states that in determining  the period for which a taxpayer has
held  property  received in an exchange,  the period for which the taxpayer held
the property exchanged shall be included if the property has, for the purpose of
determining gain or loss from a sale or exchange,  the same basis in whole or in
part in the  taxpayer's  hands  as the  property  exchanged,  and  the  property
exchanged constitutes a capital asset at the same time of the exchange.

Section  1032(a) of the Code  generally  provides  that no gain or loss shall be
recognized  to a  corporation  on the  receipt  of money or  other  property  in
exchange for stock (including treasury stock) of such corporation. Also, Section
361(a)  provides that no gain or loss will be recognized to a corporation  if it
is a party to a reorganization and exchanges property, in pursuance of such plan
of reorganization, solely for stock or securities in another corporation a party
to the reorganization.(7)

IV.      FEDERAL INCOME TAX CONSEQUENCES

Based solely upon the  Documents  and the  information  and  representations  of
Management contained herein, it is our opinion that the following Federal income
tax consequences will result:

1.  Except  as  otherwise  stated  in the Proxy  Statement  under  the  heading,
    "Certain  Federal  Income  Tax  Consequences,"  no  gain  or  loss  will  be
    recognized by Orion stockholders  solely as a consequence of the exchange of
    their Orion stock for  substantially  identical  shares of Orion Newco stock
    pursuant to the Merger.

2.  The basis of the Orion Newco stock to be received by the Orion  shareholders
    will be the same as the basis of the Orion  stock  surrendered  in  exchange
    therefor.

3.  The  holding  period of the Orion  Newco  stock to be  received by the Orion
    shareholders  will include the period during which the Orion common stock or
    Orion preferred stock, as the case may be, surrendered in exchange therefore
    was held, provided that the Orion common stock and the Orion preferred stock
    was held as a capital asset on the date of the exchange.

- ----------
7
  See also Section 1.1032-2(b) of the Regulations.

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 16


V.    SCOPE OF OPINION


The scope of this opinion is expressly  limited to the three Federal  income tax
consequences   set  forth  in  IV.   above.   The  opinion  is  based  upon  the
representations made by Management contained herein and in the Documents.
These representations have not been independently verified by us.

Specifically,   our  opinion  has  not  been  requested  and  we  have  made  no
determination  or  expressed  any  opinion  with  respect  to any other  issues,
including,  but not  limited  to: (1) the fair  market  value of any stock being
exchanged  pursuant to the Merger  Agreement  and  Exchange  Agreement;  (2) any
limitations,  including  those which may be imposed  under  Section  382, on the
availability  of net operating  loss  carryovers (or built-in  losses),  if any,
after the  Transactions;  (3) any state or local  consequences to the parties to
the Merger;  or (4) the potential  application  of Section 306 or Section 305(c)
and the regulations thereunder to Orion shareholders who receive preferred stock
in the Merger.  Furthermore,  we have not  reviewed the Orion stock option plans
that, pursuant to the Merger Agreement,  will become stock option plans of Orion
Newco, and express no opinion with respect to the  consequences to Orion,  Orion
Newco, or the holders of such options as a result of such conversion.

Our opinion,  as stated  above,  is based upon the analysis of the current Code,
the  Regulations  thereunder,  current  case law,  and  published  rulings.  The
foregoing   authorities  are  subject  to  change,   and  such  changes  may  be
retroactively  effective.  If so, our views set forth above may be affected  and
may not be relied upon.  Further,  any variation or  differences in the facts or
representation  recited herein,  for any reason,  might affect our  conclusions,
perhaps in an adverse manner, and make them inapplicable.  In addition,  we have
not been  engaged to and will not update our opinion for changes in facts or law
occurring subsequent to the date hereof.

This opinion is being rendered  solely to the Orion  Shareholders  and is solely
for their  benefit.  This  opinion may not be relied upon by any other person or
persons,  or be used for any  other  purposes,  including,  but not  necessarily
limited  to,  filings  with  Governmental  agencies  without  our prior  written
consent.  However,  we  understand  that this  opinion  will be  included  as an
appendix to the Proxy  Statement  to be filed with the  Securities  and Exchange
Commission. We consent to the inclusion of our opinion with such filing.

This letter  represents our views as to the  interpretation of existing law and,
accordingly,  no  assurance  can be given that the IRS or the courts  will agree
with the above analysis.


                                                              Very truly yours,

<PAGE>

Board of Directors                                               January 6, 1997
Orion Network Systems, Inc.                                              Page 17

                                                             
                                             Graphic Omitted




                             RESTATED AMENDMENT #10
                            TO THE SECOND AMENDED AND
                           RESTATED PURCHASE CONTRACT

                  THIS RESTATED AMENDMENT #10 TO THE SECOND AMENDED AND RESTATED
PURCHASE  CONTRACT (the "Restated  Amendment  #10") is entered into on this 10th
day of December,  1996 by and between  International Private Satellite Partners,
L.P.,  d/b/a Orion  Atlantic,  L.P.,  a Delaware  limited  partnership  with its
principal offices located at 2440 Research Boulevard, Rockville, Maryland 20850,
United  States of America  ("Orion"),  and Matra  Marconi  Space UK  Limited,  a
company  organised  and  existing  under the laws of England  and Wales with its
Registered  Office at The Grove,  Warren  Lane,  Stanmore,  Middlesex,  HA7 4LY,
England (the "Contractor").

                  WHEREAS,  Orion Satellite  Corporation,  as General Partner of
Orion, and British  Aerospace  Public Limited Company ("BAe"),  entered into the
Second Amended and Restated Purchase Contract, dated 26 September 1991 (together
with all amendments thereto, the "F1 Contract");

                  WHEREAS,  the F1  Contract  was  assigned  by  BAe to  British
Aerospace Space Systems Limited,  the name of which was subsequently  changed to
MMS Space  Systems  Limited  after its  acquisition  by Matra  Marconi  Space UK
Limited;

                  WHEREAS,  the parties have reached a revised  agreement on the
terms under which certain incentive payments will be made;

                  WHEREAS,  the parties  previously entered into Amendment #9 to
the F1 Contract under which the conditions  precedent to Orion's obligations did
not occur;

                  WHEREAS,  the parties previously entered into Amendment #10 to
the F1 Contract  (the  "Original  Amendment  #10")  under  which the  conditions
precedent to the effectiveness of that Amendment did not occur;

                  NOW, THEREFORE, in consideration of the above premises and the
mutual  covenants  and  agreements  contained  herein,  and for  other  good and
valuable consideration, the receipt of which is hereby acknowledged, the parties
hereto (hereinafter, the "Parties") agree as follows:

                  1.  DEFINED  TERMS.   Except  as  otherwise   defined  herein,
capitalized  terms used herein and not otherwise defined shall have the meanings
ascribed to them in the F1 Contract.

Restated Amendment #10

                                     Page 1

<PAGE>




                  2.  AMENDMENT  #9.  Amendment #9 is terminated in its entirety
and shall be of no force and effect.

                  3.  AMENDMENT   #10.    The   conditions   precedent   to  the
effectiveness  of Original  Amendment  #10 did not occur and,  accordingly,  the
Original Amendment #10 shall be of no force and effect.

                  4.  CONDITION  TO  EFFECTIVENESS  OF THIS  AMENDMENT.  Orion's
obligations under this Restated Amendment #10 shall become effective when (i) an
Option Agreement to purchase the ORION 2 Spacecraft constructed and delivered in
accordance with the ORION 2 Purchase Contract,  as to be amended,  between Orion
and  Contractor  (the  "Option  Agreement")  is in  effect  and  (ii)  at  least
$25 million in Option  payments have been made by Orion to Contractor.  The date
upon which this Restated  Amendment #10 becomes  effective is herein referred to
as the "Effective Date".

                  5. ORION  COVENANT AS TO PAYMENT.  Orion hereby  covenants and
agrees that, without the Contractor's  consent,  it shall not, after the date of
this Amendment,  subordinate the payments required to be made hereunder or under
Articles 15.6.1 and 15.6.2 of the F1 Contract (the  "Incentives") to the payment
of the  principal of or the interest on any new debt  incurred or  guaranteed by
Orion or any  affiliate  of ORION or to the payment of any  obligation  incurred
with respect to the Spacecraft provided under the F1 Contract.  On the Effective
Date,  Orion shall provide to the Contractor  Orion's  representation  verifying
that no such subordination  occurred between the date of this Restated Amendment
#10 and the Effective Date.

                  6. PAYMENT OF INCENTIVE: PURCHASE OF DEBENTURES

                  (a) On the Effective  Date,  Orion shall pay to the Contractor
by wire transfer into a bank account established by the Contractor in the United
States of America,  the details of which account shall be made known to Orion at
least two (2) weeks prior to the Effective  Date,  $13,000,000 of the Incentives
due and payable on such date.

                  (b) On the  Effective  Date,  the  Contractor  shall  purchase
$10,000,000  aggregate principal amount of those Debentures issued by ONS or any
ONS  affiliate,  provided  that Orion makes the  payment  required to be made by
Section  6(a).  The  Debentures  shall have terms  identical  to those issued to
British Aerospace Public Limited Company (or any affiliate thereof).

                  (c) Orion shall pay the difference  between the Incentives due
and payable on the Effective Date and  $13,000,000 on the last day of the Option
Period (as defined in the Option Agreement).

                  (d) Orion shall pay all of the  remaining  Incentives  as they
become due in accordance with the payment schedule in Articles 15.6.1 and 15.6.2
of the F1 Contract.

Restated Amendment #10

                                     Page 2

<PAGE>


                  7.    ADDITIONAL PROVISIONS.
                        ---------------------

                  (a) In the event of any  inconsistency  between this  Restated
Amendment #10 and the remaining provisions of the F1 Contract, the terms of this
Restated Amendment #10 shall govern.

                  (b) This Restated Amendment #10 may be executed by the Parties
hereto  in two or more  counterparts,  each of which  shall be  deemed  to be an
original  instrument  but all of which  shall be  deemed  to be one and the same
instrument.

                  (c) Contractor  hereby waives and releases any  materialman's,
mechanic's  or other liens it may have with  respect to any of the  payments due
hereunder.

                  (d) This  Restated  Amendment #10 shall be governed by the law
of the State of Maryland, U.S.A.

                  IN WITNESS  WHEREOF,  the Parties have each duly executed this
Restated Amendment #10 as of the day and year first written above.

INTERNATIONAL PRIVATE                                MATRA MARCONI SPACE
SATELLITE PARTNERS, L.P.                             UK LIMITED

By:  Orion Satellite Corporation,
     Its General Partner


By:  /s/W. Neil Bauer                                By: /s/Armand Carlier
     ----------------------------                        -----------------------
     W. Neil Bauer                                       Armand Carlier
     President


Restated Amendment #10




[The  portions  of this  Exhibit  for  which  confidential  treatment  has  been
requested are marked by brackets ([ ]). In addition,  an asterisk (*) appears in
the right hand margin of each  paragraph in which  confidential  information  is
included.]

                           COMMERCIAL-IN-CONFIDENCE


                                          
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                               ORION 2 SPACECRAFT



                                PURCHASE CONTRACT




- --------------------------------------------------------------------------------
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                            COMMERCIAL-IN-CONFIDENCE


                                TABLE OF CONTENTS

WHEREAS...................................................................1

DEFINITIONS...............................................................1

1. ORION 2 CONTRACT......................................................11

2. ENTIRE AGREEMENT......................................................12

3. SCOPE OF THE WORK.....................................................13

4. NOTICE TO PROCEED; CONDITIONS PRECEDENT...............................14

5. CONTRACT PRICE........................................................14

6. PAYMENT...............................................................16

7. ACCESS TO WORK........................................................22

8. DELIVERABLE ITEMS AND DELIVERY DATES..................................25

9. FINAL ACCEPTANCE......................................................27

10. TRANSFER OF TITLE AND ASSUMPTION OF RISK.............................31

11. ORION 2 SPACECRAFT DELIVERY INCENTIVE AND LATE 
DELIVERY LIQUIDATED DAMAGES..............................................32

12. EXTENSIONS FOR EXCUSABLE DELAYS......................................33

13. CORRECTION OF DEFECTS................................................35

14. DISCLAIMER OF WARRANTIES, LIMITATION OF LIABILITY AND 
INTER-PARTY WAIVER OF LIABILITY..........................................38

15. ORION 2 SPACECRAFT IN-ORBIT PERFORMANCE WARRANTY.....................39

16. SUBCONTRACTS.........................................................43

                                       i
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17. INDEMNIFICATION......................................................45

18. INSURANCE............................................................46

19. REPLACEMENT SATELLITE................................................50

20. TERMINATION FOR CONVENIENCE..........................................53

21. REMEDIES FOR DEFAULT.................................................54

22. TERMINATION IN SPECIAL CASES.........................................59

23. PUBLICATION OF INFORMATION...........................................60

24. CONFIDENTIALITY AND NONDISCLOSURE OF PROPRIETARY INFORMATION.........60

25. LICENSE RIGHTS.......................................................63

26. PATENTS, TRADEMARKS AND COPYRIGHTS...................................64

27. ORION 2 CONTRACT AMENDMENTS..........................................65

28. GOVERNMENTAL APPROVALS...............................................66

29. RESPONSIBILITY FOR THE CONTRACT......................................66

30. DISPUTE RESOLUTION...................................................67

31. CONTRACT MANAGEMENT..................................................70

32. SECURITY INTEREST AND FINANCIAL INFORMATION..........................70

33. ASSIGNMENT...........................................................71

34. NOTICES AND DOCUMENTATION............................................72

35. SEVERABILITY AND WAIVER..............................................73

                                       ii


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36. COMPLIANCE WITH THE LAW, PERMITS AND LICENSES........................74

37. APPLICABLE LAW; SUBMISSION TO JURISDICTION; APPOINTMENT 
OF  AGENT FOR ACCEPTANCE OF SERVICE; INTERPRETATION AND LANGUAGE.........74

38. SURVIVAL.............................................................75

39. KEY PERSONNEL........................................................75

40. PROGRESS REPORTS.....................................................76

41. LAUNCH VEHICLE AGENCY................................................76

42. GUARANTEE OF CONTRACTOR OBLIGATIONS..................................78

43. INTEREST.............................................................78

                                      iii


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                      ORION 2 SPACECRAFT PURCHASE CONTRACT

                 PART 1(A) ORION 2 PRICING, TERMS and CONDITIONS


THIS ORION 2 SPACECRAFT  PURCHASE  CONTRACT  (referred to herein as the "ORION 2
Contract")  is  made as of the  31st  day of July  1996,  between  INTERNATIONAL
PRIVATE SATELLITE PARTNERS, L.P., d/b/a ORION ATLANTIC, L.P., a Delaware limited
partnership  with its  principal  offices  located at 2440  Research  Boulevard,
Rockville,   Maryland  20850,  United  States  of  America  (hereinafter  called
"ORION"),  and MATRA MARCONI SPACE UK LIMITED,  a company organized and existing
under the Laws of  England  and Wales with its  registered  office at The Grove,
Warren Lane,  Stanmore,  Middlesex,  HA7 4LY,  ENGLAND  (hereinafter  called the
"Contractor").

WHEREAS


A.   The primary object of ORION is the carrying on of the business of providing
     a telecommunications system by the use of space satellites.

B.   ORION  anticipates  providing the business referred to in recital A through
     the ORION satellite ("ORIONSAT") system.

C.   The ORION 2 Spacecraft to be constructed  pursuant to this ORION 2 Contract
     is intended to form part of the space segment of the ORIONSAT system.

D.   ORION and the Contractor  have agreed that the Contractor  will perform the
     work as defined below and that ORION will pay for the Work on the terms and
     conditions set out in this Agreement.


NOW, THEREFORE,  in consideration of the above premises and the mutual covenants
and agreements contained herein, the parties hereto (hereinafter, the "Parties")
agree as follows:

DEFINITIONS


"Advance Payment"                              means Fifty-Three Million Dollars
                                               ($53,000,000).



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                            COMMERCIAL-IN-CONFIDENCE





"Affiliate"                                    means,   with   respect   to  any
                                               entity,    any    other    entity
                                               Controlling,   Controlled  by  or
                                               under  common  Control  with such
                                               entity.

"Aggregate Predicted Transponder Life"         means the sum of   the  Predicted
                                               Transponder   Life  of  each  and
                                               every   Serviceable   Transponder
                                               embodied in the Launched  ORION 2
                                               Spacecraft   and   represents   a
                                               projection of the revenue-earning
                                               capacity of the Launched  ORION 2
                                               Spacecraft.

"Amendment to the  ORION  2  Contract"         means   a    written    agreement
                                               modifying  the ORION 2  Contract,
                                               which   agreement  is  signed  on
                                               behalf of ORION by its  President
                                               (or another person  designated by
                                               the  President in writing to sign
                                               such  agreement) and on behalf of
                                               the   Contractor   by  both   its
                                               respective  Contracts Manager and
                                               Project   Manager,    and   which
                                               agreement  expressly  states that
                                               it is an  "Amendment to the ORION
                                               2 Contract."

"Business Day"                                 means  any  day  other  than  the
                                               following: a Saturday,  Sunday or
                                               other  day  on  which  banks  are
                                               authorized  to be  closed  in the
                                               State  of  New  York  or  London,
                                               England.

"Calendar Day"                                 means any day.

"Constructive Total Loss"                      means,  with respect to the ORION
                                               2 Spacecraft,  that either of the
                                               following  conditions  (A  or  B)
                                               applies:  (A) (i)  the  Aggregate
                                               Predicted   Transponder  Life  is
                                               less than  _____________________,
                                               or (ii) fewer  than______________
                                               downlink     Transponders     are
                                               Serviceable   Transponders,    or
                                               (iii) fewer than  _______________
                                               downlink     Transponders    with
                                               _______  at  the  12.5-12.75  GHz
                                               frequency  and  _______ at either
                                               of the two  frequency  ranges  of
                                               10.95-11.2  or   11.45-11.7   GHz
                                               frequency     are     Serviceable
                                               Transponders;   or  (B)  (i)  the
                                               ORION  2   Spacecraft   fails  to
                                               arrive at its designated  orbital
                                               location or the Contractor  fails
                                               to    deliver    the     In-Orbit
                                               Acceptance   Report   within  one
                                               hundred and eighty (180) Calendar
                                               Days  after  Launch,  or (ii) the
                                               ORION 2 Spacecraft  is completely
                                               destroyed    or   is    otherwise
                                               rendered incapable of operation.

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                            COMMERCIAL-IN-CONFIDENCE


"Consultant"                                   means   any   third   party   (i)
                                               authorized  by ORION  to  provide
                                               technical and program support and
                                               assistance in connection with the
                                               performance   of  the   ORION   2
                                               Contract,  or  (ii)  which  is  a
                                               representative  of or  consultant
                                               to any Financing Entity.

"Contract Price"                               means the firm fixed price of One
                                               Hundred Ninety-Six Million,  Nine
                                               Hundred      Thousand     Dollars
                                               ($196,900,000)  as  such  may  be
                                               adjusted in  accordance  with the
                                               terms of the ORION 2 Contract.

"Control," "Controlling," or "Controlled"      means  with  regard to any entity
                                               the    legal,    beneficial    or
                                               equitable ownership,  directly or
                                               indirectly, of fifty (50) percent
                                               or more of the capital  stock (or
                                               other ownership interest,  if not
                                               a  corporation)  of  such  entity
                                               ordinarily having voting rights.

"Correction Plan"                              means  a  plan  submitted  by the
                                               Contractor  which details how the
                                               Contractor  shall  correct  (i) a
                                               failure to make adequate progress
                                               towards completion of any Work or
                                               (ii) a default  or  breach  under
                                               the   ORION   2    Contract    in
                                               accordance with Article 21.

"Data and  Documentation"                      means that data and documentation
                                               to be supplied by the  Contractor
                                               to   ORION    pursuant   to   the
                                               requirements    of   Part    2(A)
                                               (Statement   of   Work)   and  as
                                               specified  in Part 2(B)  (ORION 2
                                               Contract            Documentation
                                               Requirements List).

"Defect"                                       means  (i)  with  regard  to  the
                                               ORION   2   Spacecraft   and  all
                                               components thereof, any defect in
                                               design,  material or workmanship,
                                               or    failure   to   perform   in
                                               accordance        with        the
                                               specifications  and  requirements
                                               set  out  or  referred  to in the
                                               ORION 2 Contract and the Data and
                                               Documentation delivered from time
                                               to  time   under   the   ORION  2
                                               Contract   which   ORION  or  its
                                               Consultant   reasonably  believes
                                               may adversely  affect the ORION 2
                                               Spacecraft performance; (ii) with
                                               regard to services,  a failure to
                                               conform   to  a   high   standard
                                               consistent      with     industry
                                               practice;  and (iii) with  regard
                                               to  Data  and  Documentation,   a

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                            COMMERCIAL-IN-CONFIDENCE


                                               failure      to     meet      any
                                               specifications   or  requirements
                                               set   forth   in  the   ORION   2
                                               Contract.

"Deliverable Item"                             means the ORION 2 Spacecraft  and
                                               Data and  Documentation and other
                                               items so identified in subsequent
                                               amendments   to   the   ORION   2
                                               Contract.   Where   the   context
                                               permits,  as used herein the term
                                               "Deliverable Items" shall include
                                               and  refer  not only to the whole
                                               of the items listed in Article 8,
                                               but  also  every  component  part
                                               thereof.

"Delivery"                                     shall have the  meaning  ascribed
                                               to it in Article 8.1.

"Delivery Dates"                               means  those  dates  set forth in
                                               Article 8.1.

"Demand"                                       means,  in the context of Article
                                               21 hereof, a demand by ORION made
                                               of   the   Contractor   for   the
                                               Contractor     to    provide    a
                                               Correction Plan in the event that
                                               the Contractor is failing to make
                                               adequate    progress    in    the
                                               performance   of  the   ORION   2
                                               Contract  or  is  in  default  or
                                               breach.

"Dollars"                                      shall mean United States Dollars.

"Effective Date of Contract"                   means the first date set forth in
                                               this ORION 2 Contract.

"Excusable Delay"                              shall have the  meaning  ascribed
                                               to it in Article 12.

"F1 Contract"                                  means  the  Second   Amended  and
                                               Restated  Purchase  Contract  for
                                               the F1  Spacecraft  between Orion
                                               Atlantic,   L.P.  and  MMS  Space
                                               Systems  Limited  (formerly known
                                               as   British    Aerospace   Space
                                               Systems Limited),  as assignee of
                                               British  Aerospace Public Limited
                                               Company, dated 26 September 1991,
                                               as amended.


"Final Acceptance"                             shall have the  meaning  ascribed
                                               to it in Article 9.

"Financing Agreements"                         means any and all  documents  and
                                               agreements    evidencing   and/or
                                               securing  monies  provided  on  a
                                               full or partial debt basis by any
                                               Financing Entity to ORION to fund
                                               the  construction and delivery of
                                               the  
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                                               ORION   2   Spacecraft   and  the
                                               purchase of Long-Lead Items.

"Financing Entity"                             means any entity  (other than the
                                               Contractor or parties  related to
                                               the Contractor), e.g., commercial
                                               bank,  merchant bank,  investment
                                               bank,      commercial     finance
                                               organization,   corporation,   or
                                               partnership, providing money on a
                                               full or  partial  debt  basis  to
                                               ORION  to fund  the  construction
                                               and   delivery  of  the  ORION  2
                                               Spacecraft    and   purchase   of
                                               Long-Lead Items.

"Initial Incentive Amount"                     means____________________________
                                               ______________   percent  of  the
                                               Total  Amount at Risk,  as may be
                                               adjusted in  accordance  with the
                                               terms of the ORION 2 Contract.

"In-Orbit Acceptance Requirements"             means that document which is Part
                                               3(D) of the ORION 2 Contract.

"In-Orbit Acceptance Test Plan"                means  that  document  which is a
                                               Deliverable  Item under Part 2(B)
                                               (ORION 2  Contract  Documentation
                                               Requirements    List)    and   as
                                               described in Part 3(D)  (In-Orbit
                                               Commissioning and Acceptance Test
                                               Requirements)   of  the  ORION  2
                                               Contract.

"In-Orbit  Acceptance Test Report" or
 "In-Orbit   Acceptance   Report"              means  that  document  which is a
                                               Deliverable  Item under Part 2(B)
                                               (ORION 2  Contract  Documentation
                                               Requirements    List)    and   as
                                               described     in    Parts    2(A)
                                               (Statement   of  Work)  and  3(D)
                                               (In-Orbit    Commissioning    and
                                               Acceptance Test  Requirements) of
                                               the ORION 2 Contract.

"In-Orbit Performance Warranty"                shall   mean   the   Contractor's
                                               warranty as to the performance of
                                               the ORION 2 Spacecraft  following
                                               Final Acceptance.

"In-Orbit Performance Warranty Period"         shall have the  meaning  ascribed
                                               to it in Article 15.2.

"Insurers"                                     means  those  entities  providing
                                               Launch Insurance.

"Intentional Ignition"                         means, with respect to the Launch
                                               Vehicle, the point in time during
                                               the   launch    countdown    when
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                                               initiation of the gas  generators
                                               igniters   firing   command   and
                                               firing   of  any   of   the   gas
                                               generators igniters occurs.

"Key Personnel"                                shall have the  meaning  ascribed
                                               to it in Article 39.

"Initial Progress Payment"                     means   the   initial    Progress
                                               Payment of Dollars required to be
                                               paid  under  Part  1(B)  (ORION 2
                                               Payment  Plans  and   Termination
                                               Liability Amounts) of the ORION 2
                                               Contract.

"Launch"                                       means    Intentional    Ignition,
                                               followed  by (i)  release  of the
                                               Launch  Vehicle from the launcher
                                               hold down restraints for purposes
                                               of    lift-off,    or    (ii)   a
                                               Constructive Total Loss.

"Launch Agreement"                             means the  agreement  between the
                                               Contractor and the Launch Vehicle
                                               Agency to  perform  the Launch of
                                               the ORION 2 Spacecraft.

"Launch Damaged Transponders"                  shall have the  meaning  ascribed
                                               to it in Article 15.2.2.

"Launch  Date"                                 means the  calendar  date  within
                                               the Launch Slot during  which the
                                               Launch is scheduled to occur.

"Launch Insurance"                             means  insurance which covers the
                                               ORION  2   Spacecraft   from  the
                                               period  beginning at  Intentional
                                               Ignition  and  ending  no  sooner
                                               than  one  hundred  eighty  (180)
                                               Calendar Days following Launch.

"Launch Services"                              shall     mean     the     launch
                                               campaign/transportation,   launch
                                               services,  mission  planning  and
                                               launch/early   operations   phase
                                               services  as  more   particularly
                                               described  in  Section  7 of Part
                                               2(A).

"Launch Slot"                                  means  the  period  1 March  1999
                                               through  31 March  1999,  as such
                                               period   may   be   adjusted   by
                                               agreement of the Parties,  during
                                               which the Launch is  scheduled to
                                               occur.
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"Launch  Vehicle"                              means  an  Atlas  IIAS   Standard
                                               launch  vehicle system (with such
                                               customization  as may  be  agreed
                                               separately   between  the  Launch
                                               Vehicle    Agency    and   ORION)
                                               consisting   of  an  Atlas  lower
                                               stage  and  Centaur  upper  stage
                                               connected   by   an    interstage
                                               adapter, the payload fairing, and
                                               the    payload    adapter    with
                                               separation system.

"Launch Vehicle Agency"                        means  Lockheed  Martin  or  such
                                               other    Subcontractor    as   is
                                               selected  to  supply  the  Launch
                                               Vehicle    for   the    ORION   2
                                               Spacecraft.

"Launched ORION 2 Spacecraft"                  means  the  ORION  2   Spacecraft
                                               after its Launch.

"Long-Lead Items"                              means those satellite  components
                                               purchased   by   the   Contractor
                                               pursuant to Article 19.

"Major Subcontract"                            means a Subcontract which is of a
                                               value exceeding Two Million, Five
                                               Hundred      Thousand     Dollars
                                               ($2,500,000 ) or of importance or
                                               critical in nature to the overall
                                               program (e.g., a Subcontract  for
                                               major    or    critical    units,
                                               subsystems   or  other  items  or
                                               services).

"Maneuver Lifetime"                            shall have the  meaning  ascribed
                                               to it in Article 3.4.

"Milestone"                                    means  completion of a portion of
                                               the Work with  respect to which a
                                               payment   is   to  be   made   in
                                               accordance   with  the  Milestone
                                               Payment Plan incorporated in Part
                                               1(B)  (ORION 2 Payment  Plans and
                                               Termination Liability Amounts) of
                                               the ORION 2 Contract.

"Milestone Payments"                           means  those  payments  listed as
                                               Milestone  Payments  in Part 1(B)
                                               (ORION  2   Payment   Plans   and
                                               Termination Liability Amounts) of
                                               the ORION 2 Contract.

"Mission Specific Hardware and Software        means those items of hardware and
                                               software  described in Section 10
                                               of Part 2(A)  (Statement of Work)
                                               of the ORION 2 Contract.

"Monthly  Amount"                              means the difference  between the
                                               Total  Amount  at  Risk  and  the
                                               Initial  Incentive  Amount  which

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                                               difference  is divided into sixty
                                               (60) equal  monthly  amounts each
                                               having       a      value      of
                                               _________________________________
                                               __________  as may be adjusted in
                                               accordance  with the terms of the
                                               ORION 2 Contract.

 "NPD" or "Notice to Proceed Date"             means the date upon which all the
                                               conditions set forth in Article 4
                                               have been met.

"ORION 2 Spacecraft"                           means   the   satellite   to   be
                                               constructed   and   delivered  to
                                               ORION  as part of the Work and as
                                               identified     in    Part    2(A)
                                               (Statement  of Work) of the ORION
                                               2 Contract.

"Other Users"                                  shall have the  meaning set forth
                                               in Article 14.4.1.

"Partial Loss"                                 shall have the  meaning  ascribed
                                               to it in Article 9.2.2.

"Predicted Transponder Life"                   means   the   period   of   time,
                                               measured  in years,  over which a
                                               Serviceable  Transponder  can  be
                                               operated,   commencing  from  the
                                               date of Delivery of the  In-Orbit
                                               Acceptance Report, this period of
                                               time being equal to  whichever is
                                               the shortest of:

                                               (i) thirteen (13) years, or

                                               (ii)  the   ORION  2   Spacecraft
                                               predicted     propellant     life
                                               calculated  in  accordance   with
                                               Section 5 of Part 3(D)  (In-Orbit
                                               Commissioning and Acceptance Test
                                               Requirements)   of  the  ORION  2
                                               Contract, or

                                               (iii)  the  period  of time  over
                                               which  there is  predicted  to be
                                               sufficient  solar  array power to
                                               operate     such      Serviceable
                                               Transponder  co-extensively  with
                                               all       other       Serviceable
                                               Transponders,    calculated    in
                                               accordance with Section 5 of Part
                                               3(D) (In-Orbit  Commissioning and
                                               Acceptance Test  Requirements) of
                                               the ORION 2 Contract.
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                            COMMERCIAL-IN-CONFIDENCE

"Primary Transponder"                          means  a  Transponder  where  the
                                               communication     signals     are
                                               received from and  transmitted to
                                               the ground.

"Progress Payments"                            means  those  payments  listed as
                                               Progress  Payments  in Part  1(B)
                                               (ORION  2   Payment   Plans   and
                                               Termination Liability Amounts).

"Replacement Satellite"                        shall have the  meaning  ascribed
                                               to it in Article 19.

"Request for Payment"                          means a request  for  payment  in
                                               the form of Annex A hereto.

"Revenue"                                      means  all  amounts  received  by
                                               ORION   with    respect   to   an
                                               individual  Primary  Transponder,
                                               whether  as a result of its sale,
                                               lease,     license    or    other
                                               disposition,  it being understood
                                               that,  if  said  amounts  are not
                                               received    in   equal    monthly
                                               installments,  the  total  amount
                                               received  or  to be  received  by
                                               ORION shall be deemed received in
                                               equal monthly  installments  over
                                               the  remainder  of the  Predicted
                                               Transponder    Life    of    such
                                               Transponder.

"Satisfactorily Operating Primary   
Transponder"                                   means a Primary Transponder which
                                               is  capable  of  meeting  (i) the
                                               requirements  of Part 3(A) (ORION
                                               2   Spacecraft    Specifications)
                                               regarding   Primary   Transponder
                                               performance  and (ii) the Primary
                                               Transponder   Test   Requirements
                                               defined  in Part  3(D)  (In-Orbit
                                               Commissioning and Acceptance Test
                                               Requirements).

"Senior Executive"                             means    each   of   the   senior
                                               executives  designated  from time
                                               to time in writing,  by ORION and
                                               by the Contractor,  respectively,
                                               to be their  representatives  for
                                               the     purposes    of    dispute
                                               resolution   under  the  ORION  2
                                               Contract.

"Serviceable Transponder"                      means a Primary Transponder which
                                               meets the  requirements  therefor
                                               as set forth in Section 5 of Part
                                               3(D) (In-Orbit  Commissioning and
                                               Acceptance Test  Requirements) of
                                               the  ORION  2  Contract   and  is
                                               determined,  pursuant  to Section
                                               5.2  thereof,  to be  capable  of
                                               operation in accordance with such
                                               requirements  during  periods  of
                                               eclipse.  In the  event  
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                                               that   the   Launched   ORION   2
                                               Spacecraft    has    insufficient
                                               energy  to  operate  thirty  (30)
                                               Serviceable    Transponders    in
                                               eclipse,      those      specific
                                               Transponders,   if   any,   which
                                               failed the  testing  requirements
                                               of Section 5.2 of Part 3(D), will
                                               not   be    counted    twice   in
                                               determining  the total  number of
                                               Transponders    that    are   not
                                               Serviceable Transponders.

"Subcontract"                                  means a  contract  awarded by the
                                               Contractor to a Subcontractor  or
                                               a    contract    awarded   by   a
                                               subcontractor at any tier for the
                                               performance  of any  of the  Work
                                               specified    in   the   ORION   2
                                               Contract.

"Subcontractor"                                means a person or company awarded
                                               a Subcontract.

"Termination Liability Amounts"                means  the   amounts   listed  as
                                               Termination  Liability Amounts in
                                               Part 1(B) (ORION 2 Payment  Plans
                                               and     Termination     Liability
                                               Amounts) of the ORION 2 Contract.

"Total Amount  at  Risk"                       means  a firm  fixed  sum of Nine
                                               Million,   Nine   Hundred   Fifty
                                               Thousand Dollars ($9,950,000).

"Transponder"                                  means an individual  transmission
                                               channel  of   defined   bandwidth
                                               providing  a path,  inclusive  of
                                               amplification,          frequency
                                               translation     and     frequency
                                               channelization,  from  a  receive
                                               antenna with defined coverage and
                                               polarization    to   a   transmit
                                               antenna    also   with    defined
                                               coverage and polarization.

"Vendor Financing Takeout Payment"             means   the   aggregate    amount
                                               required   to  be   paid  to  the
                                               Contractor and the Launch Vehicle
                                               Agency   in    respect   of   the
                                               Milestone  Payment  Schedule  and
                                               the  Progress  Payment  Schedule,
                                               respectively,   under  Part  1(B)
                                               (ORION  2   Payment   Plans   and
                                               Termination Liability Amounts) of
                                               the ORION 2 Contract  to the date
                                               upon which the  Vendor  Financing
                                               Takeout  Payment is made less the
                                               sum of the Advance  Payment,  the
                                               Initial  Progress Payment and any
                                               other  amount paid by ORION prior
                                               to such  date in  respect  of the
                                               Milestone  Payment  Schedule  

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                            COMMERCIAL-IN-CONFIDENCE

                                               and the Progress Payment Schedule
                                               of Part 1(B).

"Work"                                         means   the  whole  of  the  work
                                               described in Part 2(A) (Statement
                                               of  Work)  and  elsewhere  in the
                                               ORION 2 Contract  and,  where the
                                               context so  permits or  requires,
                                               "Work" includes any part or parts
                                               of the  Work.  The Work  includes
                                               all   elements   and   phases  of
                                               delivering the operational  ORION
                                               2 Spacecraft in-orbit from design
                                               and   manufacture    through   to
                                               Launch,   Launch   Services   and
                                               in-orbit testing,  including, but
                                               not limited to,  provision of all
                                               necessary      equipment      and
                                               documentation   related  thereto,
                                               including Deliverable Items.

Note: The satellites(s) (one or more) referred to herein are variously described
as the "spacecraft" or the "satellite(s)".

1. ORION 2 CONTRACT

1.1

The documents listed in this Article, as amended from time to time in accordance
with Article 27 herein, constitute the ORION 2 Contract:
<TABLE>
<CAPTION>

                                                                                           Issue No.

<S>                   <C>                                                                   <C>       
       Part 1(A):     ORION 2 Pricing, Terms and Conditions                                 Issue 1

       Part 1(B):     ORION 2 Payment Plans and Termination Liability Amounts               Issue 1

       Part 2(A):     ORION 2 Statement of Work                                             Issue 3

       Part 3(A):     ORION 2 Spacecraft Specifications                                     Issue 3

       Part 3(D):     ORION 2 In-Orbit Commissioning and Acceptance Test Requirements       Issue 3

       Part 3(C):     ORION 2 Spacecraft On-Ground Test Requirements                        Issue 3

       Part 2(B):     ORION 2 Contract Documentation Requirements List                      Issue 2
     
       Part 3(B):     ORION 2 Spacecraft Product Assurance Requirements                     Issue 3




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                            COMMERCIAL-IN-CONFIDENCE


       Part 4:        Replacement Satellite Long-Lead Items                                 Issue 3

       Annex A:       ORION 2 Request for Payment and Contractor's Certificates             Issue 1

       Appendix I:    Form of Contractor Certificate                                        Issue 1

       Annex B:       Launch Agreement Inter-Party Waiver of Liability Provision            Issue 1

       Annex C:       Launch Agreement Termination Charges
</TABLE>



1.2

Notwithstanding anything herein to the contrary, the documents listed in Article
1.1 above shall be deemed to constitute one fully integrated  agreement  between
the Parties.  Should there be any ambiguity,  discrepancy or inconsistency among
any  of the  documents  constituting  the  ORION  2  Contract,  such  ambiguity,
discrepancy  or  inconsistency  shall  be  resolved  according  to the  order of
precedence in which the documents are listed in Article 1.1. Unless specifically
indicated  otherwise herein,  all Article and Paragraph  references in this Part
1(A) shall be deemed to be to Part 1(A).

1.3

In the event the  Parties are unable to resolve any  ambiguity,  discrepancy  or
inconsistency  which affects the Work, ORION shall direct the Contractor and the
Contractor shall follow such direction as to the  interpretation  to be followed
in carrying out the Work. If the Contractor disputes ORION's  interpretation and
such  interpretation  results in delay and/or increased cost and/or risks,  such
dispute shall be handled by the procedures set forth in Article 30.


2.   ENTIRE AGREEMENT

This  ORION 2  Contract  constitutes  the  sole  agreement  as to the Work to be
performed  hereunder  by the  Contractor  and  supersedes  any prior  agreements
relating thereto.  The Parties further agree that this ORION 2 Contract does not
supersede the F1 Contract (including all amendments thereto) and the F1 Contract
shall not be integrated herewith.

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                            COMMERCIAL-IN-CONFIDENCE
3.   SCOPE OF THE WORK

3.1

The Contractor  shall furnish the Work in accordance  with the provisions of the
documents which constitute the ORION 2 Contract. In the performance of the Work,
the Contractor  shall supply all personnel,  materials and facilities  necessary
therefor.

3.2

ORION  shall  specify  the  final  beam  coverage  for one  (1) of the  transmit
(Tx)/receive(Rx)  coverages no later than NPD and for a second Tx/Rx coverage no
later than three (3) months after NPD.  ORION shall also,  no later than two (2)
months after NPD,  specify the final  transponder  beam  connectivities.  If all
finalized  beam  coverages  are  consistent  with  what is  achievable  with the
proposed antenna aperture sizes meeting the requirements of Part 3(A), price and
delivery  schedule  shall  remain  unchanged.   If  all  finalized   transponder
connectivities are consistent with the proposed switching and filtering hardware
meeting the requirements of Part 3(A), price and delivery  schedule shall remain
unchanged.

3.3

Prior to NPD,  the  Contractor  shall  present a thermal  design  approach  with
supporting data and analysis (at the  communications  panel level),  which shall
demonstrate to the reasonable  satisfaction of ORION that the ORION 2 Spacecraft
will be designed in full compliance  with the  requirements of Section 8 of Part
3(A) regarding the thermal control subsystem.

3.4

Prior to NPD, the Contractor shall demonstrate that the ORION 2 Spacecraft has a
realistically  calculated  forty (40) kg dry mass  margin  adequate  to meet the
specified  contract  performance   requirements,   including  maneuver  lifetime
("Maneuver Lifetime") as set forth in Section 2.1 of Part 3(A).

3.5

The Launch Vehicle Agency is obligated under the Launch Agreement to deliver the
Launch  Vehicle with a contract  level of  performance  of seven  thousand,  six
hundred  (7,600)  pounds of payload  systems mass to a reference  geosynchronous
transfer  orbit.  The Parties  have  discussed  with the Launch  Vehicle  Agency
methods   of   enhancing   the    performance   of   the   Launch   Vehicle   by
using______________________  which will increase the delivery  capability of the
Launch  Vehicle by  approximately  one hundred  seventy  (170) pounds of payload
systems  mass  to  a  reference   geosynchronous  transfer  orbit  (the  "Launch
Enhancements").  The ORION 2  Spacecraft  Maneuver  Lifetime  is based  upon the
availability of the Launch Enhancements.  Notwithstanding any other provision of
this ORION 2  Contract,  if the Launch  Vehicle  Agency does not make the Launch
Enhancements  available,  the Maneuver  Lifetime  shall be reduced to twelve and
seven tenths (12.7) years. In such case,  ORION and the Contractor shall use all


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                            COMMERCIAL-IN-CONFIDENCE


commercially  reasonable  efforts to cause the Maneuver Lifetime to be increased
to thirteen (13) years and the Parties agree to amend such number in the ORION 2
Contract to the extent of such increase.  If the Launch Vehicle Agency  provides
to the Contractor  other Launch Vehicle  improvements  in addition to the Launch
Enhancements,  then seventy percent (70%) of any increased  payload systems mass
achieved due to such Launch Vehicle  improvements shall be allocated to ORION to
increase the Maneuver  Lifetime  and thirty  percent  (30%) of the same shall be
allocated to the Contractor to increase the Contractor's mass margin.

4.   NOTICE TO PROCEED; CONDITIONS PRECEDENT

The  Contractor  shall have no obligation to proceed with the Work until (a) the
Contractor receives from ORION a written notice to proceed, the Advance Payment,
and the payment that ORION is required to make to the  Contractor  under Section
5(a) of  Amendment  #10 to the F1  Contract  and (b) the Launch  Vehicle  Agency
receives from ORION the Initial Progress Payment.

If NPD does not occur by 15 November 1996, adjustments,  if any, in the Contract
Price will be determined in accordance with the provisions of Article 5.2.

If NPD does not occur by 31 March 1997,  the Parties  agree to negotiate in good
faith concerning a later NPD as well as the price and schedule impact, if any.


5.   CONTRACT PRICE

5.1

For the full,  satisfactory and timely performance of the Work by the Contractor
in accordance  with the provisions of the ORION 2 Contract,  ORION shall pay the
Contractor  the  Contract  Price,  which  includes all taxes  applicable  at NPD
including personal property taxes, imposts and duties wherever the Work is being
carried out but excludes  interest due under Article  6.1.2.  The Contract Price
shall be paid in accordance with Article 6 below.  Except as otherwise expressly
provided  in the ORION 2  Contract,  the  Contract  Price is not  subject to any
escalation,  or to any  adjustment  or  revision  by reason of the  actual  cost
incurred by the Contractor in the performance of the ORION 2 Contract.



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                            COMMERCIAL-IN-CONFIDENCE


The Contract Price shall comprise the following elements,  including any related
training and documentation:

Item                Description                             Amounts $
- --------------------------------------------------------------------------------


1.                  ORION 2 Spacecraft

2.                  Launch Vehicle

3.
                    Launch Services


- --------------------------------------------------------------------------------
                    CONTRACT PRICE TOTAL                    $196,900,000
- --------------------------------------------------------------------------------


5.2      Variations  in  Contract  Price When NPD Does Not Occur by 15  November
         1996

(a)      In the event that NPD does not occur by 15 November 1996,  then for the
         period from 15 November 1996 to 31 March 1997, the price of the ORION 2
         Spacecraft  and Launch  Services  provided by the  Contractor  shall be
         escalated  on a daily basis at the annual rate  (computed on a 365 days
         basis) of four  percent  (4%),  unless such  failure  results  from the
         Contractor's  failure to perform its obligations  under Articles 3.3 or
         3.4,  in which  case the price of the  ORION 2  Spacecraft  and  Launch
         Services will not be so escalated during such period.

(b)      The price of the Launch Vehicle shall remain fixed until and through 30
         September 1996.

(c)      In the event NPD does not occur on or  before 30  September  1996,  the
         Launch Vehicle price of_______________________ shall be fixed until and
         through 31 December 1996 provided  ORION pays the Launch Vehicle Agency
         an Eight Hundred Thousand Dollar ($800,000)  launch  reservation fee on
         or before 1 October  1996,  which  reservation  fee shall,  at NPD,  be
         applied against the _____________________ Initial Progress Payment.

(d)      If ORION does not pay Eight Hundred Thousand Dollars  ($800,000) to the
         Launch Vehicle Agency on or before 1 October 1996 or NPD does not occur
         on or before 31 December  1996,  the  Contractor  shall  terminate  the
         Launch Agreement  effective 31 December 1996,  unless ORION directs the
         Contractor  in writing to extend such Launch  Agreement and enters into
         an  Amendment  of the  Orion  2  Contract,  satisfactory  in  form

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                            COMMERCIAL-IN-CONFIDENCE


         and substance to the Contractor,  reflecting any change in schedule and
         Contract  Price  that  results  from the  failure of NPD to occur on or
         before 31 December 1996.


6.   PAYMENT

6.1.1    Payments

The ORION 2 Contract shall be paid as follows:

(a)      Progress  Payments.  ORION shall make  Progress  Payments to the Launch
         Vehicle Agency in accordance  with the Progress  Payment Plan specified
         in Part 1(B) as adjusted by Articles 5 and/or 27 hereof.  Each Progress
         Payment  shall  be  payable  by the  Contractor  submitting  to ORION a
         Request  for  Payment  accompanied  by a  certificate  in the  form  of
         Appendix I to Annex A hereto.

(b)      Milestone Payments.

         (i)      ORION  shall make  Milestone  Payments  to the  Contractor  in
                  accordance  with the Milestone  Payment Plan specified in Part
                  1(B) as  adjusted  by  Articles 5 and/or 27  hereof.  With the
                  exception  of the  first  Milestone  Payment  for the  ORION 2
                  Spacecraft,  which shall be made  simultaneously with NPD each
                  Milestone   Payment   shall  be  payable  by  the   Contractor
                  submitting  to ORION a Request  for Payment  accompanied  by a
                  certificate  in the  form of  Appendix  I to  Annex  A  hereto
                  together with such  supporting  data as the  Contractor  deems
                  necessary or appropriate. A Milestone shall not be regarded as
                  completed until all of the Work relevant to that Milestone has
                  been  completed and documented in accordance  with  applicable
                  specifications  and procedures and relevant  documentation and
                  training   required  under  the  ORION  2  Contract  for  such
                  Milestone  have  been  provided  to  ORION.  The  Contractor's
                  failure to achieve any  Milestone in the sequence set forth in
                  Part 1(B) shall not limit the Contractor's rights to claim and
                  be paid other Milestone  Payments when the relevant  Milestone
                  is achieved.

         (ii)     Subject to the  provisions  of Article  6.1.1(e),  in no event
                  shall the cumulative Milestone Payments made to the Contractor
                  for the ORION 2 Spacecraft or Launch  Services at any point in
                  time exceed the cumulative  amounts specified up to that point
                  in time for  Milestone  Payments for the ORION 2 Spacecraft or
                  Launch  Services  as  set  forth  in  Part  1(B)  as it may be
                  modified from time to time.

(c)      Launch Reservation Fees.

         (i)      On the date of execution of the Orion 2 Contract,  ORION shall
                  pay  to the  Launch  Vehicle  Agency  the  sum of Two  Hundred
                  Thousand  Dollars  ($200,000) to reserve the Launch Slot until
                  and through 30 September  1996.  If NPD does not occur by such
                  date,  ORION  shall pay to the Launch  Vehicle  Agency,  on or
                  before  1  October  1996,  the sum of Eight  Hundred  Thousand
                  Dollars  ($800,000)  to  


<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


                  reserve the Launch Slot until and through 31 December 1996. At
                  NPD, the  Contractor  shall  credit such Two Hundred  Thousand
                  Dollars  ($200,000)  (and any  other  amount  paid by ORION to
                  reserve a Launch Slot,  including the Eight  Hundred  Thousand
                  Dollars  ($800,000),  if paid)  against the __________________
                  ___________________________  Initial  Progress Payment.

(d)      Delivery  to  ORION.   Each   Request  for  Payment  and   accompanying
         certificate  shall be telefaxed to ORION  followed by airmailed  signed
         copies.

(e)      Advance Payment and Vendor Financing Takeout Payment.

         (i) On or before NPD,  ORION shall  transfer by wire transfer into bank
accounts   established  by  the  Contractor  and  the  Launch  Vehicle   Agency,
respectively  in the United  States of America,  the  details of which  accounts
shall  be made  known to ORION at  least  two (2)  weeks  prior to NPD,  (A) the
Advance Payment to the Contractor;  and (B) the Initial  Progress  Payment (less
any launch  reservation  fees paid by ORION to the Launch Vehicle Agency) to the
Launch Vehicle Agency.

         (ii) The Advance  Payment  shall be used and  credited  against  future
installments  of the Milestone  Payments  required  under Part 1(B), as and when
such payments become due, and the Contractor agrees to hold in trust the Advance
Payment,  or any portion  thereof,  for the express use and purpose of paying in
full each  Milestone  Payment  required under Part 1(B) as and when such payment
becomes  due  under  the  terms of the ORION 2  Contract  and of  offsetting  or
recouping any Termination Liability Amount that ORION is obligated to pay to the
Contractor  under the ORION 2  Contract.  Within  ten (10) days of any date upon
which  ORION  is  obligated  to pay  any  Termination  Liability  Amount  to the
Contractor,  the Contractor  shall pay to ORION the difference,  if any, between
the Advance Payment and such Termination  Liability Amount.  Notwithstanding any
Milestone  Payments or Progress  Payments  required under Part 1(B), ORION shall
not be obligated to make any Milestone  Payments or Progress  Payments in excess
of the Advance  Payment and the Initial  Progress  Payment until the last day of
the twenty-first (21st) month after NPD.

         (iii)  (A) At least  one week  prior to the last day of the  eighteenth
(18th) month following NPD, ORION shall notify the Contractor in writing whether
ORION will be able to pay the Progress  Payment portion of the Vendor  Financing
Takeout  Payment  on or before  the last day of the  twenty-first  (21st)  month
following NPD in accordance with Article 6.1.1(e)(iii)(C). If ORION notifies the
Contractor  that it will be able to do so, ORION shall supply to the  Contractor
evidence reasonably satisfactory to the Contractor of its ability to do so.

                  (B) In the  event  ORION  does  not pay the  Progress  Payment
portion of the Vendor Financing  Takeout Payment to the Launch Vehicle Agency on
or before the last day of the eighteenth (18th) month after NPD, but does commit
to make such payment on or before the last day of the twenty-first  (21st) month
after NPD, then

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                            COMMERCIAL-IN-CONFIDENCE

                           (x) in the  event  ORION  does  not  pay  the  Vendor
Financing  Takeout  Payment in accordance  with Article  6.1.1(e)(iii)(C)  on or
before the last day of the twenty-first  (21st) month after NPD, ORION shall pay
the Contractor  the amount of Two Million  Dollars  ($2,000,000)  and the Launch
Vehicle Agency any termination  liability  amount the Contractor is obligated to
pay the Launch Vehicle Agency which amount is not to exceed thirty percent (30%)
of the price of the Launch Vehicle less any payments made by either Party to the
Launch Vehicle Agency; and

                           (y)  beginning  with the first day of the  nineteenth
(19th) month after NPD, interest shall accrue only on the difference between the
amounts  required to be paid to the Launch  Vehicle  Agency  under the  Progress
Payment  schedule  set forth in Part  1(B) as of the last day of the  eighteenth
(18th)  month  after NPD and any  payments  made by either  Party to the  Launch
Vehicle  Agency.  Such interest  shall accrue on a daily basis at the prime rate
announced by The Chase Manhattan Bank (National  Association)  from time to time
plus one-half  percent (0.5%) until ORION makes the Progress  Payment portion of
Vendor Financing  Takeout Payment,  said interest  accruing period not to exceed
(3) months; and

                           (z) at least  one  week  prior to the last day of the
eighteenth  (18th) month after NPD,  ORION shall  deliver to the  Contractor  an
unconditional,  irrevocable letter of credit in form and substance  satisfactory
to the  Contractor  from a bank  satisfactory  to the  Contractor  or equivalent
protection satisfactory in form and substance to the Contractor, the face amount
of which shall be sufficient to secure those  payments that ORION is required to
make under Article 6.1.1(e)(iii)(B)(x) and (y) (the "Guarantee").

                  (C)  ORION  agrees to pay,  no later  than the last day of the
twenty-first (21st) month after NPD, the Milestone Payment portion of the Vendor
Financing  Takeout  Payment to the Contractor and the Progress  Payment  portion
(plus interest, if any, required under Article 6.1.1(e)(iii)(B)(y) above) of the
Vendor  Financing  Takeout  Payment  to the  Launch  Vehicle  Agency,  provided,
however,  that ORION shall be required to make any Milestone  Payment portion of
the Vendor  Financing  Takeout  Payment  only to the extent  the  Contractor  is
entitled to Milestone  Payments in excess of the Advance  Payment in  accordance
with the ORION 2 Contract. The Vendor Financing Takeout Payment shall be payable
by the  Contractor  submitting to ORION a Request for Payment  accompanied  by a
certificate in the form of Appendix I to Annex A hereto.

         (iv) If ORION fails to pay, or notify the  Contractor at least one week
prior to the last day of the eighteenth  (18th) month following NPD that it will
be able to pay, the Progress  Payment  portion of the Vendor  Financing  Takeout
Payment on or before the last day of the twenty-first (21st) month following NPD
or if ORION  fails to deliver  to the  Contractor  the  Guarantee  specified  in
Article  6.1.1(e)(iii)(B)(z)  with respect to amounts due to the Launch  Vehicle
Agency,  then the Contractor may

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


terminate the Launch Agreement.  If ORION fails to deliver to the Contractor the
Guarantee  specified  in  Article  6.1.1(e)(iii)(B)(z)  with  respect to the Two
Million  Dollars  ($2,000,000),  then  either  Party may  terminate  the ORION 2
Contract  upon ten (10) days prior written  notice to the other Party,  provided
ORION fails to deliver  such portion of the  Guarantee  within such ten (10) day
period.  Contractor's  exclusive  remedy for  ORION's  failure  to  deliver  the
Guarantee  specified  in  Article  6.1.1(e)(iii)(B)(z)  with  respect to the Two
Million  Dollars  ($2,000,000)  (subject  to  the  applicable  notice  and  cure
procedure  set forth  above in this  Article  6.1.1(e)(iv))  shall be to sell or
dispose of the ORION 2 Spacecraft,  or any part thereof,  at a public or private
sale for cash,  upon  credit or for  future  delivery  as the  Contractor  deems
appropriate.  If ORION  fails to make the Vendor  Financing  Takeout  Payment in
accordance  with  Article  6.1.1(e)(iii)(C)  on or  prior to the last day of the
twenty-first  (21st)  month after NPD,  either Party may  terminate  the ORION 2
Contract upon written notice to the other Party and, if terminated,  ORION shall
pay any  termination  liability  amount the  Contractor  is obligated to pay the
Launch Vehicle Agency, which amount is not to exceed thirty percent (30%) of the
price of the Launch Vehicle less any payments made to the Launch Vehicle Agency.
Contractor's  exclusive  remedy for ORION's failure to make the Vendor Financing
Takeout Payment shall be to receive payment of Two Million Dollars  ($2,000,000)
and to sell or  dispose of the ORION 2  Spacecraft,  or any part  thereof,  at a
public or private  sale for cash,  upon  credit,  or for future  delivery as the
Contractor  deems  appropriate,  and to draw under the  Guarantee.  No less than
thirty (30) Calendar Days prior to the Contractor's first attempts to sell or to
dispose of the ORION 2  Spacecraft,  and no less than fifteen (15) Calendar Days
prior to any subsequent  attempts by the Contractor to sell or to dispose of the
ORION 2 Spacecraft,  the Contractor shall deliver,  by overnight  courier (which
delivery shall be acknowledged by written  receipt),  written notice of any such
intent to sell or dispose of the ORION 2 Spacecraft.  If ORION fails within such
notice period, as applicable,  to make the Vendor Financing Takeout Payment plus
accrued and unpaid interest due and payable to the Contractor  under the ORION 2
Contract as well as  reasonable  costs,  expenses,  attorneys'  fees,  and costs
incurred by the Contractor for the storage, protection,  removal,  modification,
completion,  sale  and  delivery  of the  ORION  2  Spacecraft  incurred  by the
Contractor in excess of those  contemplated by the Contact Price, the Contractor
may proceed  with such sale or  disposal.  Any  purchaser at any such sale shall
hold the property  sold  absolutely  free from any claim or right on the part of
ORION,  and ORION hereby  waives (to the extent  permitted by law) all rights of
redemption  or stay  that  ORION  now has or may have at any time in the  future
under any rule of law or statute now existing or hereafter enacted. The proceeds
realized  from any such sale shall be  applied  first to the  reasonable  costs,
expenses, attorneys' fees, and costs incurred by the Contractor for the storage,
protection, removal, modification, completion, sale, and delivery of the ORION 2
Spacecraft or any portion thereof, second to accrued and unpaid interest due and
payable to the Contractor under the ORION 2 Contract,  and third to the Contract
Price  (collectively,  the  "Disposal  Costs").  The  Contractor  shall  have no


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                            COMMERCIAL-IN-CONFIDENCE

obligation  to reimburse  any portion of the Advance  Payment to ORION or pay to
ORION any proceeds of the sale or disposal of the ORION 2 Spacecraft  unless the
Contractor sells the ORION 2 Spacecraft (other than to ORION) within thirty (30)
months after NPD, in which case the  Contractor  shall pay to ORION one-half the
difference, if any, between the sale price and the Disposal Costs.


6.1.2    Payments by ORION

Subject to Article  6.1.1(e),  which provides for no interest  payment by either
Party relating to the Advance Payment,  Progress Payments (except as provided in
Article 6.1.1(e)(iii)(B)(y)), or Milestone Payments prior to the last day of the
twenty-first  (21st)  month after NPD,  ORION shall pay each  Milestone  Payment
(other than the first ORION 2 Spacecraft  Milestone  Payment),  Progress Payment
(other than the Initial  Progress Payment and the payments to the Launch Vehicle
Agency pursuant to Article 6.1.1(c)) and the Vendor Financing Takeout Payment in
full  within  thirty  (30)  Calendar  Days after the  delivery  of a Request for
Payment (in accordance  with the procedures set forth in Article 6.1.1) into the
appropriate bank accounts set forth in Article 6.1.3.

Where the thirty (30)  Calendar  Days  allowed for payment  after  delivery of a
Request  for Payment for a  Milestone  or Progress  Payment  causes a payment to
become due on a non-Business Day, such payment shall be due on the next Business
Day.

Subject to Article  6.1.1(e),  (a) Contractor  shall be entitled to the interest
earned on any  properly  due but unpaid  amount for each  Calendar Day after the
date any Progress or Milestone  Payment is due; and (b) Contractor shall be paid
any  interest  to which it is  entitled  within  ten (10)  Calendar  Days of the
determination that such interest is due; and (c) interest shall be calculated in
accordance with Article 43.

Any  amounts  payable to the Launch  Vehicle  Agency  shall be paid  directly by
ORION.

6.1.3    Procedures

Payment  shall be made in  accordance  with  Articles  6.1.1 and 6.1.2  into the
following bank accounts:

In the case of the Contractor:

         Account name:     MATRA MARCONI SPACE UK LIMITED

         Account number:   _________

         Bank name:        Barclays Bank PLC

         Sort code:        __________

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


         Bank address:     Southern International Banking Centre
                           P.O. Box 44
                           Napier Court
                           Napier Road
                           Kings Meadow
                           Reading RG1 8BW
                           England

In the case of ORION:

         Account name:     IPSP Receipt Account

         Account number:   ____________

         Bank name:        The Chase Manhattan Bank, N.A.

         Sort code:        ____________

         Bank address:     4 Chase MetroTech Center
                           Brooklyn, New York 11245
                           United States of America

In the case of the Launch Vehicle Agency:

         Account name:     Lockheed Martin Commercial Launch Services, Inc.

         Account number:   __________

         Bank name:        Citibank N.A.

         ABA number:       ___________

         Bank address:     One Penn's Way             New Castle, Delaware  
19720


Any  payment  shall be deemed to have been made when  credit  for the  amount is
established in the above bank accounts.  Each Party shall notify the other Party
in writing within ten (10) Calendar Days of a change to the above bank accounts.

6.2      Dispute

In a written  notice (which may be a telefax  followed by an  originally  signed
copy)  received by the  Contractor no later than twenty (20) Business Days after
receipt by ORION of a Request for Payment in connection with a Milestone Payment
or other payment under Article 6.4, ORION may dispute  timely  completion of the
Milestone associated with such Milestone Payment or other payments. In the event
there is such a dispute,  ORION shall  nonetheless pay the Milestone  

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                            COMMERCIAL-IN-CONFIDENCE

Payment in accordance with Article 6.1.2 without  waiving any of its rights.  In
the event it is  determined,  either by  agreement  of the Parties or by dispute
resolution  pursuant to Article 30 hereof,  that the  Milestone  with respect to
which such notice shall have been timely  received  was not  completed as of the
date of the Request for Payment,  ORION shall be entitled to the interest at the
rate specified in Article 43 earned on the disputed amount for each Calendar Day
after the date  such  Milestone  Payment  was paid  until the day the  Milestone
associated therewith is completed.  ORION shall be paid any interest to which it
is  entitled  within  ten (10)  Calendar  Days of the  determination  that  such
interest is due. Interest shall be calculated in accordance with Article 43.

6.3      Other Payments

Except as otherwise  expressly stated herein, all other payments by ORION to the
Contractor  shall be made in accordance with the procedures set forth in Article
6.1.3 within  thirty (30)  Calendar  Days after  receipt by ORION of a telefaxed
invoice. This invoice will be followed by an airmailed original and one copy.

6.4      Setoff

In the event  that one Party has not paid the second  Party any amount  which is
due and  payable to the second  Party  under the ORION 2  Contract,  such second
Party shall have the right to set off such amount  against  payments  due to the
first Party, provided any amount in dispute pursuant to Article 6.2 shall not be
considered due and payable while the dispute is being resolved.

6.5

If (a) the  Contractor  fails to make the  Spacecraft  available  to the  Launch
Vehicle  Agency  in  sufficient  time for the  Launch to occur on or prior to 31
March 1999 and such  failure is due to any  reason  other than the  Contractor's
failure to perform the Work in accordance with Part 2(A) or other than Excusable
Delay  (but  not  Excusable   Delay  caused  by  ORION's  failure  to  meet  its
responsibilities  under the  Orion 2  Contract  (including  Article  18.5),  its
invalid  exercise of its rights under  Article 13, or its exercise of its rights
under  Article  41),  or (b) the Launch  Agreement  is  terminated  pursuant  to
Articles  5.2(d)  or 41,  then the  Contract  Price  shall be  increased  by any
additional amount required by the Launch Vehicle Agency to perform the Launch.

7.   ACCESS TO WORK

7.1

ORION and the Consultants  shall have reasonable  access (upon reasonable notice
to the Contractor from ORION,  but no less than  forty-eight  (48) hours) to any
premises  of  the  Contractor  or  Major   Subcontractors,   or  other  selected
Subcontractors on an "as needed" basis for short durations,  where Work is being
performed and may observe all of the Work, as well as any associated  facilities
and documentation, during regular business hours, or such other times as 
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                            COMMERCIAL-IN-CONFIDENCE

Work is being performed  under the ORION 2 Contract.  ORION shall justify to the
Contractor why such access to other selected  Subcontractors  is needed but such
access shall not be unreasonably withheld.  ORION and the Consultants shall also
be entitled to attend all  meetings  and  reviews of the  Contractor  and of the
Contractor  with  Subcontractors  related to project  schedule  and  management,
engineering,  design,  manufacturing,  integration  and  testing  and  Launch as
reasonably  necessary  and  with  the  prior  approval  of the  Contractor.  The
Contractor shall provide ORION and the Consultants  reasonable assistance in the
performance of such  inspections.  The Parties agree that  non-escort  permanent
badges to agreed work areas where ORION  activities are being performed shall be
made  available  to all ORION  representatives  subject  to  adequate  notice of
personnel details being provided to the Contractor and security  clearance being
granted.

7.2

The Contractor  shall provide office space and facilities for the  accommodation
of up to six (6)  representatives  (plus a secretary)  employed by ORION (or its
Consultants) at the Contractor's plants and at environmental test facilities (if
located off site) and shall ensure that such space and  facilities  are provided
at the repeater Subcontractors' plant for up to three (3) representatives and at
other selected Subcontractors' plants on a temporary basis to attend meetings or
witness tests.  Provision for up to four (4) engineers (plus a secretary)  shall
be made at the Launch site facility.  At a minimum, the Contractor shall provide
desks,  chairs,  normal office supplies,  local telephone service (long distance
telephone  usage to be charged to ORION),  car parking  facilities and access to
meeting rooms, copying machines and facsimile  equipment,  and access to and use
of video conferencing  facilities,  if any, at the Contractor's  plants (in this
connection,  Contractor  will  take  reasonable  measures  to  facilitate  video
conferencing  between  Contractor's  plants and ORION's  premises,  provided the
video  conferencing  facilities of both Parties are  fundamentally  compatible).
ORION shall make ORION space segment capacity for video  conferencing  available
without charge.

7.3

The  Contractor  shall  require  that  any  Subcontract   contains  a  provision
substantially similar to this Article 7 to ensure ORION's rights under the ORION
2 Contract, except that ORION's access to the Launch Vehicle Agency's facilities
shall be controlled by the Launch Vehicle Agency.

7.4

ORION  and  its  Consultants  will  have  reasonable  access  to  any  drawings,
specifications,  standards or process  descriptions  which are  available to the
Contractor and relevant to the ORION 2 Spacecraft and Data and  Documentation to
be Delivered under the ORION 2 Contract. If an electronic mail system is used by
the Contractor to distribute  documentation,  access to ORION representatives is
to be approved by the Contractor.  The Contractor  will make  available,  to the
extent permitted under Article 24, copies of such documentation, at no charge to
ORION,  on the  reasonable  request  of ORION or ORION's  Consultant  where such
documentation   is   


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                            COMMERCIAL-IN-CONFIDENCE

necessary for evaluation of designs,  performance considerations,  assessment of
test plans and test results or for any other purpose  connected with the design,
qualification,  testing,  Launch,  Final  Acceptance or operation of the ORION 2
Spacecraft  components.  The  Contractor  will  allow  ORION or its  Consultants
reasonable  access to all drawings and document indices to facilitate their work
in this  respect.  The  Contractor  shall  establish  data links between its and
ORION's facilities such that ORION has remote electronic access to those project
related  documents  identified  in Part 2(B).  ORION  shall  make space  segment
capacity  required  for  such  remote  access  available  without  charge.   The
Contractor will also provide ORION and its  Consultants  with "real time" access
to all measured data taken at the Contractor's and Subcontractors' facilities on
a non-interference basis. In addition,  ORION shall have access to those project
related  documents  which are of the type to which  ORION had access  during the
implementation of the F1 Contract.

7.5

In exercising its rights under the ORION 2 Contract,  ORION and the  Consultants
shall be subject to Governmental security requirements of the Contractor and its
Subcontractors and the Contractor shall use its best efforts to ensure that such
security  requirements do not unduly restrict access or viewing by ORION subject
to adequate notice of ORION personnel  details being provided to the Contractor.
Access  by  ORION  or  any  Consultant  to  Subcontractor  facilities  shall  be
coordinated through the Contractor.

7.6

In the event a meeting is  convened  at the  Contractor's  or a  Subcontractor's
plant,  the Contractor shall provide  reasonable  advance notice to ORION (e.g.,
one week for regularly scheduled  meetings) and make the necessary  arrangements
to facilitate the entry of ORION or its Consultants to the meeting place subject
to adequate notice of ORION personnel details being provided to the Contractor.

7.7

Subject to Article 27 hereof,  the  inspection,  examination,  agreement  to, or
approval,  waiver or deviation by ORION (other than in  accordance  with Article
27) with regard to any design,  drawing,  specification  or other  documentation
produced  under the ORION 2  Contract  shall not  relieve  the  Contractor  from
fulfilling its contractual  obligations or result in any liability being imposed
on ORION.

7.8

ORION shall have the right to participate in and make  recommendations,  but not
to control,  give  directions or assign  actions,  in all review meetings at the
system,  subsystem and critical  component levels, as well as test review board,
manufacturing review board and failure review board meetings.  The Parties agree
to work cooperatively in resolving issues that arise at the various review board

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                            COMMERCIAL-IN-CONFIDENCE


meetings    and,    where   ORION   has   an   objection   to   a    recommended
resolution/implementation,   the  Parties  agree  to  discuss  it  at  a  senior
management  level  (ORION's  Senior Vice  President,  Engineering  and Satellite
Operations and Contractor's  Director of Civil Communications  Satellites) prior
to implementation, but the final decision concerning implementation shall remain
with the Contractor who shall provide ORION with a written  explanation  for its
decision.

8.   DELIVERABLE ITEMS AND DELIVERY DATES

8.1

"Delivery"  shall be deemed to have occurred for each  Deliverable Item upon its
Final  Acceptance  by ORION.  The Parties  acknowledge  that the Delivery of the
ORION 2 Spacecraft is to be in orbit. Subject to this Article and Articles 5, 12
and 27, the Parties agree that the Delivery  Dates for  Deliverable  Items under
the ORION 2 Contract  (depending  on the final  configuration  selected)  are as
follows:

<TABLE>
<CAPTION>

Item     Description                                     Delivery Date

<S>                        <C>                           <C>                                      
1.       Delivery of ORION 2 Spacecraft in Orbit         28.25 months after NPD (provided a Launch
                                                         Slot is available in such timeframe)

2.       Data and Documentation                          As specified in Section 9.2.1 of Part
                                                         1(A), Part 2(A), Part 2(B) and Part 3(D)
3.       Mission Specific Hardware and Software          As specified in Section 10 of Part 2(A)

- ------------------------------------------------------------------------------------------------------
</TABLE>


The Parties will negotiate in good faith reasonable  adjustments in the Delivery
Date for the ORION 2  Spacecraft  upon the  addition,  elimination  or technical
complication or  simplification  of other ORION 2 Spacecraft items prior to NPD,
to the extent such additions,  eliminations  and/or  technical  complications or
simplifications are, singly or in the aggregate, material (i.e., more than minor
in effect on cost, schedule and/or performance).

If at NPD there is less than twenty-eight and three quarters (28.75) months from
NPD to the last possible day of the Launch Slot, which day shall be confirmed at
NPD with the Launch  Vehicle  Agency,  then the Parties  agree to work  together
cooperatively  and in good faith to devise a revised delivery  schedule with the
existing  launch  vehicle  provider (or, if necessary,  with a 

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                            COMMERCIAL-IN-CONFIDENCE



different  launch vehicle  provider) such that there is at least a two (2) month
margin in the schedule (which schedule is twenty-six and three quarters  (26.75)
months to Launch) and the Parties  shall enter into an  Amendment of the ORION 2
Contract reflecting any resultant changes in schedule and Contract Price.

If (a) the  Contractor  fails to make the  Spacecraft  available  to the  Launch
Vehicle  Agency  in  sufficient  time for the  Launch to occur on or prior to 31
March  1999  and  such  failure  is due to  Excusable  Delay  or (b) the  Launch
Agreement  is  terminated  pursuant to Articles  5.2(d) or 41, then the Delivery
schedule shall be amended to reflect an in-orbit Delivery Date occurring six (6)
weeks (forty-two (42) Calendar Days) after the actual launch date of the Orion 2
Spacecraft.

For the avoidance of doubt, the Parties recognize and agree that in the event of
a Constructive Total Loss of the ORION 2 Spacecraft, the Delivery Dates provided
in Article 8 hereof shall,  in respect of the ORION 2 Spacecraft and its related
Data and  Documentation  not  already  delivered,  be  extinguished  and have no
further effect.

8.2

The Contractor  understands  and agrees that, with respect to the Delivery Dates
for all  Deliverable  Items,  whether  those  items  are set out in the  ORION 2
Contract or in  subsequent  Amendments  to the ORION 2 Contract,  time is of the
essence under the ORION 2 Contract.  Nothing in the foregoing  sentence shall in
any way modify either the specific remedies for default  specified  elsewhere in
the ORION 2 Contract,  including but not limited to Articles 11.2 and 21, or the
specific dispute resolution requirements specified in the ORION 2 Contract.

8.3

The Contractor,  if requested to do so by ORION,  agrees to construct and launch
an additional satellite, the Replacement Satellite, in accordance with the terms
set forth in Article 19.

8.4

On time schedules to be mutually agreed to in writing, ORION will make available
to the Contractor fully operational  in-orbit test equipment  equivalent to that
used on the F1 Spacecraft as specified in Part 2(A) and facilities (Mt.  Jackson
and Fucino) for use in meeting the  requirements  of Part 3(D).  Contractor will
make  available  (but not deliver)  additional  test  equipment,  as  reasonably
necessary,  for  in-orbit  testing  of the  American  coverage  beam in order to
satisfy the requirements of Part 3(D).
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                            COMMERCIAL-IN-CONFIDENCE

9.   FINAL ACCEPTANCE

9.1      Data and Documentation

9.1.1

 "Final  Acceptance" (and therefore,  Delivery) of Data and Documentation  shall
occur only when:

(i)      the Contractor has fulfilled the ORION 2 Contract  requirements for the
         Data and Documentation; and

(ii)     the Data and Documentation has been delivered at the place specified in
         the ORION 2 Contract in a condition fully  conforming to the provisions
         of the ORION 2 Contract.

Data and  Documentation,  other  than  Data  and  Documentation  which  requires
approval and acceptance by ORION in accordance with Article 9.1.2 hereof,  shall
be deemed to have achieved Final Acceptance  unless rejected by ORION in writing
within ten (10) Business Days after  receipt of said Data and  Documentation  by
ORION.

If Data and  Documentation  not  requiring  approval and  acceptance by ORION is
unacceptable,  ORION shall,  within the said ten (10) Business Days,  notify the
Contractor  in  writing  in  which  respects  the  Data  and   Documentation  is
unacceptable.  Any  Data and  Documentation  that is  considered  by ORION to be
unacceptable with respect to which ORION has so notified the Contractor as being
unacceptable,  shall be  deemed  under  the  ORION 2  Contract  not to have been
Delivered unless and until the Defects that resulted in such rejection have been
remedied or  demonstrated  not to exist pursuant to  verification  procedures in
accordance  with the ORION 2 Contract and the Data and  Documentation  is at the
specified  delivery  location in accordance with the ORION 2 Contract  whereupon
ORION shall accept the Data and  Documentation  in writing and Final  Acceptance
shall occur.

9.1.2

Final Acceptance of any Data and  Documentation  requiring  approval by ORION in
accordance  with Part 2(B) shall occur when such  approval  has been  granted by
ORION in writing.  ORION shall  respond under this Article 9.1.2 within ten (10)
Business Days after  receipt of such Data and  Documentation  by ORION;  failing
such response,  the Parties shall be deemed forthwith to be in dispute and their
rights shall be  determined  in  accordance  with the  provisions  of Article 30
hereof.

9.1.3

The provisions of this Article 9.1 shall not apply to the Final  Acceptance of a
Launched  ORION 2 Spacecraft  or to the In-Orbit  Acceptance  Report.  The Final
Acceptance  of the Launched  ORION 2 Spacecraft  and of the In-Orbit  Acceptance
Report essential thereto shall be governed by Article 9.2.

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                            COMMERCIAL-IN-CONFIDENCE


9.2      Launched ORION 2 Spacecraft

9.2.1

Upon arrival at its designated orbital location, the Contractor will perform the
tests and analyses as set forth in Part 3(D) for the Launched ORION 2 Spacecraft
to determine the Aggregate  Predicted  Transponder  Life of the Launched ORION 2
Spacecraft

The results of such tests and analyses will be furnished to ORION in an In-Orbit
Acceptance Report prepared by the Contractor for the Launched ORION 2 Spacecraft
in accordance with Part 2(A), Part 2(B) and Part 3(D). Unless the Launched ORION
2 Spacecraft is a Constructive  Total Loss,  Delivery and Final  Acceptance will
take  place  upon  receipt by ORION of the  In-Orbit  Acceptance  Report in full
compliance with Part 2(A), Part 2(B) and Part 3(D).

(a)      In respect of the  Launched  ORION 2  Spacecraft  (if it arrives at its
         designated orbital location):

         (i)      Within 180 days after  Launch of the ORION 2  Spacecraft,  the
                  Contractor  shall  furnish  to ORION the  In-Orbit  Acceptance
                  Report in full  compliance  with Part 2(A), Part 2(B) and Part
                  3(D) in respect of the Launched ORION 2 Spacecraft.

         (ii)     Unless ORION shall respond to such In-Orbit  Acceptance Report
                  within thirty (30) Calendar  Days after  receipt  thereof,  or
                  such other  period of time  acceptable  to both  Parties,  the
                  Report shall be deemed acceptable.

         (iii)    If ORION's  response  under Article  9.2.2(a)(ii)  contains an
                  objection  to such  In-Orbit  Acceptance  Report,  the Parties
                  shall be deemed  forthwith  to be in dispute and their  rights
                  shall be  determined  in  accordance  with the  provisions  of
                  Article 30 hereof.

         (iv)     The existence of a dispute  shall not affect Final  Acceptance
                  set forth above;  unless,  under the procedures in Article 30,
                  it is ultimately  determined that the Launched Spacecraft is a
                  Constructive  Total Loss.  If the Launched  ORION 2 Spacecraft
                  fails to arrive at its designated  orbital location in time to
                  complete  in-orbit  testing  and  provision  of  the  In-Orbit
                  Acceptance  Report within 180 Calendar Days after Launch,  the
                  ORION 2 Spacecraft shall be deemed a Constructive Total Loss.

(b)      Without limiting any other Contractor  obligations under this Article 9
         and in order to comply with insurance requirements,  within thirty (30)
         Calendar Days following  receipt of information that one or more of the
         following  circumstances  exist,  the Contractor  shall provide written
         notice of loss to ORION and to all insurers under  applicable  policies
         (provided that the Contractor  shall have no obligation to provide such
         notice to the 

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                            COMMERCIAL-IN-CONFIDENCE


         Launch  Insurance  insurer unless ORION  identifies such insurer to the
         Contractor) specifying in such notice:

         (i)      The basis  for a Partial  Loss or a  Constructive  Total  Loss
                  under Articles 9.2.2 or 9.2.3, respectively; or

         (ii)     The Launched  ORION 2 Spacecraft  shall be  determined to fall
                  within any of the provisions of Article 9.2.3; or

         (iii)    The  Parties  are  deemed  to be in  dispute  under any of the
                  provisions of Article 9.2.(a) or Article 9.2.3.

         Such  notice of loss shall  comply  with the  provisions  of Article 34
         hereof,  and the foregoing  specified  time for the provision of notice
         may be shortened in compliance with the respective requirements of such
         insurers.

9.2.2

         A  Partial  Loss  shall  occur  in  respect  of the  Launched  ORION  2
         Spacecraft, if the In-Orbit Acceptance Report accurately confirms

         (a)      that   the   Aggregate    Predicted    Transponder   Life   is
                  __________________________  ______________  years  or less but
                  (i) is  ______________________  years or  higher,  and (ii) at
                  least  ________________  downlink  Transponders with ______ at
                  the ________ GHz  frequency and _________ at either of the two
                  frequency  ranges of  ___________ or _______ GHz frequency are
                  Serviceable  Transponders,  and  (iii) at least  _____________
                  downlink Transponders are Serviceable  Transponders,  then the
                  ORION  2  Spacecraft   will  be  deemed  to  have   sufficient
                  revenue-earning  capacity to form an economically  viable part
                  of the space  segment of the  ORIONSAT  system.  In such case,
                  ORION must accept the ORION 2 Spacecraft; and/or;

         (b)      that the  ORION 2  Spacecraft  has  fewer  than  _____________
                  downlink Transponders which are Serviceable Transponders.

9.2.3

Notwithstanding  any  other  provisions  of  this  Article  9,  if the  ORION  2
Spacecraft is a Constructive  Total Loss pursuant to item B of the definition of
such term,  the  Contractor  shall furnish ORION with written  notice of loss in
respect of the Launched  ORION 2  Spacecraft.  Such notice shall be furnished to
ORION promptly upon the Contractor's concluding from information available to it
that such Constructive  Total Loss has occurred.  In no circumstance  shall such
notice of loss be furnished  to ORION later than 180 Calendar  Days after Launch
of the ORION 2 Spacecraft.

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                            COMMERCIAL-IN-CONFIDENCE

If the  Contractor  fails to provide ORION with the notice of loss in respect of
the Launched  ORION 2 Spacecraft  specified  under this Article 9.2.3 within the
respective times specified herein,  or if ORION rejects the Contractor's  notice
of loss, the Parties shall be deemed forthwith to be in dispute and their rights
shall be determined in accordance with the provisions of Article 30 hereof.

In all  circumstances  Final  Acceptance  shall be deemed to have  occurred upon
Constructive  Total Loss. In the event of Constructive Total Loss the provisions
of Article 15 shall not apply.

9.2.4

In the  event  of a  dispute  as to the  performance  of the  Launched  ORION  2
Spacecraft,  the Parties agree to have an independent determination of the ORION
2 Spacecraft  technical  status performed by a mutually  acceptable  technically
qualified third party.  The costs incurred in retaining the third party shall be
shared equally  between the Contractor and ORION.  The Parties agree that before
reference to such  mutually-acceptable  technically-qualified  third  party,  an
informal  forum  between   Contractor's  Senior  Executive  and  ORION's  Senior
Executive shall take place to attempt a resolution of said dispute. In the event
that such  efforts to resolve the dispute  have been  unsuccessful,  the Parties
shall proceed under Article 30 hereof. The foregoing  independent  determination
may be used by either Party in any arbitration under Article 30 hereof, but such
determination shall not be binding upon the arbitrators.

9.2.5

In addition,  the following provisions shall be applicable to the implementation
of this Article 9.2:

(a)      Warranty

         The Parties  hereto  warrant and represent  that they will not withhold
         from each other any of the material  information they have or will have
         concerning anomalies,  failures and deviations from the requirements of
         the ORION 2 Contract,  from NPD through Intentional Ignition in respect
         of the ORION 2 Spacecraft.

(b)      Access to Technical Information

         Upon  request of a Party,  the other  Party will  respond or permit the
         first Party to respond to any  insurers in relation to all specific and
         reasonable questions relating to design, test, quality control,  launch
         and orbital information.  In addition, in the event a Party notifies or
         is notified by the other Party of an  occurrence  which may be expected
         to result in a Partial  Loss or  Constructive  Total  Loss  under  this
         Article  9.2,  such other  Party will permit and assist the first Party
         to:

         (i)      conduct  review  sessions  with  a  competent   representative
                  selected  by the  insurers  to  discuss  any  continued  issue
                  relating to such occurrence, including information conveyed to
                  either Party; and

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                            COMMERCIAL-IN-CONFIDENCE

         (ii)     use its best  efforts  to secure the  insurers'  access to all
                  information  used in or resulting  from any  investigation  or
                  review of the cause or effects of such occurrence; and

         (iii)    make  available  for  inspection  and copying all  information
                  necessary  to  establish  the  scope  of such  occurrence  and
                  verifying  the  accounting  methods  employed  to compute  any
                  refund payment obligated thereby.

9.2.6

If either  Party at any time after  Launch but prior to Final  Acceptance  has a
reasonable  basis for  concluding  that Final  Acceptance  will not be  achieved
within the time limits  provided for in this Article 9 and the other Party fails
to agree with that conclusion within thirty (30) Calendar Days of notice, either
Party shall have the right to proceed under Article 30.

9.2.7

Notwithstanding  that title to each Deliverable Item remains with the Contractor
until Final Acceptance,  the Contractor shall have no liability under this ORION
2 Contract  for a Partial  Loss or a  Constructive  Total  Loss;  however,  this
Article  9.2.7 shall have no effect on the rights of the Parties  under  Article
11.2 and 15.

10.  TRANSFER OF TITLE AND ASSUMPTION OF RISK

10.1

Transfer of title, free and clear of all liens and encumbrances of any kind, and
risk of loss or damage to each  Deliverable  Item  shall  pass to ORION at Final
Acceptance,  provided, however, risk of loss or damage to the ORION 2 Spacecraft
shall pass to ORION at Intentional Ignition.
<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

10.2

In the event of a Constructive Total Loss, title free and clear of all liens and
encumbrances  of any  kind  shall  pass to  ORION.  In such  event,  at  ORION's
direction,  Contractor  shall  surrender  the  ORION 2  Spacecraft  to  insurers
obligated to cover such loss.

10.3

ORION  acknowledges that prior to payment of the Milestone portion of the Vendor
Financing Takeout Payment it has no property interest in the work in progress of
the ORION 2  Spacecraft;  ORION does have  rights to  repayment  of the  Advance
Payment to the extent  provided in the ORION 2 Contract  and to the  proceeds of
any sale or disposal of the ORION 2 Spacecraft to the extent provided in Article
6.1.1(e)(iv).

11.  ORION 2 SPACECRAFT DELIVERY INCENTIVE AND LATE DELIVERY LIQUIDATED DAMAGES

11.1  Delivery Incentive

ORION  acknowledges  and  agrees  that the  Delivery  of the ORION 2  Spacecraft
earlier than the Delivery  Dates  determined  under Article 8 may be the sole or
partial cause of financial  gain being  sustained by ORION.  In the event of the
Delivery of the ORION 2 Spacecraft earlier than the applicable  Delivery Date as
it may be adjusted  pursuant to Articles 5, 8, 12, 18.5 and/or 27 hereof,  ORION
agrees  to pay  the  Contractor  within  thirty  (30)  Calendar  Days  of  Final
Acceptance as an incentive the sum of Twenty-Five Thousand Dollars ($25,000) per
Calendar Day for each day that Delivery of the ORION 2 Spacecraft occurs earlier
than the Delivery Date for the ORION 2 Spacecraft,  provided, however, that such
payments  may be  delayed  until such time as  payment  is  permitted  under any
Financing Agreement.

11.2  Late Delivery Liquidated Damages

The  Contractor  acknowledges  and  agrees  that  failure  to meet  the  ORION 2
Spacecraft  Delivery  Date  may be the  sole or  partial  cause  of  substantial
financial loss or damage being  sustained by ORION,  due to the cost of carrying
any ORION external financing,  cost of alternative means of providing service to
customers and loss of  continuity of service.  In the event that the Delivery of
the ORION 2 Spacecraft is later than the  applicable  Delivery Date as set forth
in Article  8.1 (and  notwithstanding  Article  9.2) and where such delay is not
subject to an  extension  of time  pursuant  to  Articles  5, 8, 12, 18.5 and/or
Article 27 hereof,  the Contractor agrees to pay to ORION, as liquidated damages
and not as a penalty for each  Calendar Day during the period of such delay from
and  including  the_______________  Calendar Day of lateness up to and including
the ____  __________________  Calendar Day of lateness (the "Liquidated  Damages
Period")         as         follows:         (i)        the        sum        of
_______________________________________________  for each  Calendar  Day in such
Liquidated Damages Period during which the Contractor has not achieved Milestone
13  (lateness to run from  _____________________  after NPD) and (ii) the sum of
____________________  per day for each  other  Calendar  Day in such  Liquidated
Damages


<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


Period.  The total amount of liquidated  damages payable by the Contractor shall
not  exceed the sum of Eleven  Million,  Eight  Hundred  Twelve  Thousand,  Five
Hundred Dollars ($11,812,500).

Liquidated damages may not be levied on the ORION 2 Spacecraft after termination
in  accordance  with this ORION 2 Contract or after the ORION 2  Spacecraft  has
been declared a Constructive  Total Loss in accordance  with Article 9 but ORION
shall have the right to collect those  liquidated  damages that have  previously
accrued.

11.3

ORION  shall have the right to offset any  liquidated  damages  owed to it under
this Article against any amounts due the Contractor under the ORION 2 Contract.

11.4

Except as provided under the  provisions of Article 21, the  liquidated  damages
provided in this Article shall be ORION's  exclusive remedy for late Delivery of
the ORION 2 Spacecraft and shall be in lieu of all other damages under the ORION
2 Contract,  or at law. This provision in no way limits  ORION's  remedies under
Article 22 for insolvency or bankruptcy of the Contractor.

12.  EXTENSIONS FOR EXCUSABLE DELAYS

12.1

The Contractor shall be entitled to extensions of time beyond the Delivery Dates
determined under Article 8 only in accordance with the following provisions, and
the provisions of Articles 5, 8, 18.5 and 27 and any other specific provision of
the ORION 2 Contract  providing for extensions of time beyond the Delivery Dates
set forth in Article 8.1.

12.2

12.2.1 RESERVED

12.2.2

Any delay in the  performance of the Work caused by an event which is beyond the
reasonable  control of the  Contractor or its  Subcontractors,  such as, but not
limited to, any civil commotion,  invasion,  hostilities,  sabotage, earthquake,
fire, flood,  explosion,  governmental  regulations or controls,  labor strikes,
work  stoppages  or slow  downs (but  excluding  any such  labor  strikes,  work
stoppages or slow downs occurring at the facilities of the Contractor  and/or at
any or all of the  facilities  of the Launch  Vehicle  Agency,  NEC, or COMDEV),
freight  embargoes,  or acts of God, and which delay could not have been avoided
by  the  Contractor  or a  Subcontractor  through  the  exercise  of  reasonable
foresight or reasonable  precautions,  and which cannot be  circumvented  by the
Contractor or a Subcontractor through use of its reasonable efforts to establish
work-around  plans or other  means,  or delay caused by failure by ORION to meet
its responsibilities  (including 

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


an invalid  exercise of its rights under  Article 13) under the ORION 2 Contract
or exercise by ORION of its rights under  Articles  18.5 or 41 shall  constitute
"Excusable  Delay" if notice thereof is given to ORION,  in writing,  within ten
(10)  Business  Days  after the  Contractor  shall  have  first  learned  of the
occurrence of such an event. Such notice shall include a detailed description of
the portion of the Work known to be affected by such a delay, as well as details
of any  work-around  plans,  alternate  sources  or other  means the  Contractor
expects to utilize to minimize a delay in performance  of the Work.  Notice must
also be given to ORION in writing when the event constituting an Excusable Delay
appears to have ended.  Without prejudice to the foregoing,  any postponement of
the Launch of the ORION 2 Spacecraft  which is  announced by the Launch  Vehicle
Agency  more  than  one (1)  calendar  month  prior  to the  Launch  Date  shall
constitute an event of "Excusable  Delay" within the meaning of this Article 12,
provided that the maximum total amount of such  Excusable  Delay shall be twelve
(12) months.  Notwithstanding  the foregoing,  any  postponement  of the ORION 2
Spacecraft  scheduled  Delivery Date due to a launch  failure  within sixty (60)
Calendar  Days  prior to the  Launch  Date or a Launch  postponement  due to bad
weather or a launch  vehicle  accident  occurring  proximate  to the Launch Date
shall  constitute  an event of  "Excusable  Delay"  within  the  meaning of this
Article  12 if  notice  thereof  is  given  to  ORION,  in  writing  as  soon as
practicable  but in no event  later  than  seven  (7)  Calendar  Days  after the
Contractor  shall  have  first  learned  of the  occurrence  of such  an  event,
provided,  however,  that the maximum total amount of such Excusable Delay shall
be twelve (12) months.

The  Contractor  shall be entitled to such  extensions of time as are reasonable
for the Excusable Delay. In the event ORION disputes the Excusable Delay,  ORION
must inform the  Contractor  in writing  within ten (10)  Business Days from the
date of receipt of written notice of the event  constituting  an Excusable Delay
and, if the Parties have not resolved the dispute  within the ten (10)  Business
Days of the Contractor's receipt of written notice from ORION, the dispute shall
be resolved pursuant to Article 30. Without  prejudice to the foregoing,  if any
Excusable  Delays other than Excusable  Delays resulting from ORION's failure to
meet its  responsibilities  (including  an invalid  exercise of its rights under
Article 13) under the Orion 2  Contract,  or its  exercise  of its rights  under
Article 41 or resulting from Article 18.5, exist for a cumulative period of time
exceeding  eighteen (18) calendar months, the Contractor agrees to pay to ORION,
as liquidated  damages and not as a penalty,  such reasonable  interest costs as
ORION  actually  incurs  in  relation  to any  debt  financing  of the  ORION  2
Spacecraft  directly as a consequence of such Excusable  Delay. The Contractor's
liability to pay such interest  costs to ORION shall be calculated as, and shall
be limited to, the amount of such interest  costs  incurred by ORION between (i)
the first (1st)  Calendar Day of the  nineteenth  (19th)  calendar month of such
Excusable  Delay and (ii) the last Calendar Day of such  Excusable  Delay or the
date of  termination  of the ORION 2 Contract,  whichever is the earlier.  ORION
shall be required to provide reasonable  evidence to the Contractor of it having
reasonably incurred such interest costs.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


12.3

Any  extension of time granted  under this Article  shall be  formalized  by the
execution of an Amendment to the ORION 2 Contract wherein  adjustments  shall be
recorded with respect to the new Delivery  Dates for the  Deliverable  Items set
forth in Article 8, the dates set forth in Article 6.1.1(e)(ii), (iii) and (iv),
Article  6.1.2,  and Article 41 and the delivery dates set forth in Article 19.1
and  modifications  made as  appropriate  to the  Advance  Funding  schedule  of
payments set forth in Article 19.2 and the Part 1(B) Milestone Payment Schedule,
and Progress Payment Schedule,  and Termination Liability Amounts Schedule.  The
Contractor  acknowledges  and  understands  that the  occurrence of an Excusable
Delay shall not entitle the  Contractor  to an increase in the  Contract  Price,
unless the  Excusable  Delay is caused  directly by ORION's  failure to meet its
responsibilities  under  the ORION 2  Contract  or by  exercise  by ORION of its
rights under  Article 41 or resulting  from Article  18.5,  in which event there
shall be an equitable adjustment to the Contract Price.

13.  CORRECTION OF DEFECTS

13.1

ORION shall notify the  Contractor in writing when it believes any Defect exists
in the ORION 2  Spacecraft,  the  services  or the Data and  Documentation.  The
Contractor  may from time to time advise ORION in writing that it disagrees with
ORION or ORION's  Consultant as to the existence or nature of a Defect.  In such
event,  the  Parties  shall  negotiate  in good faith to  determine  what Defect
exists, if any, and any action required to remedy such Defect.

13.2

Without  limiting the obligations of the Contractor or the rights of ORION under
the  provisions  of the  ORION  2  Contract,  prior  to  Launch  of the  ORION 2
Spacecraft  the  Contractor  shall,  at its  expense,  use its best  efforts  to
promptly  correct any Defect related to the ORION 2 Spacecraft which it or ORION
discovers during the course of the Work, and notwithstanding  that a payment may
have been made in respect thereof, and regardless of prior reviews, inspections,
approvals  or  acceptances.  This  provision  is  subject  to the  right  of the
Contractor to have any items  containing a Defect  returned at the  Contractor's
expense  to  the  Contractor's   facility  for  the  Contractor  to  verify  the
non-conformance  and to correct the  Defect.  All  transportation  costs such as
packaging,  shipping and insurance, shall be paid by the Contractor, except that
if it is reasonably determined after investigation that ORION or its Consultants
directly caused the Defects in question, or that the item is in conformance with
applicable specifications and requirements,  ORION will reimburse the Contractor
for the  above-described  costs  and  will  pay all  costs  associated  with the
shipment to and from the  Contractor's  facility.  If the Contractor fails to so
correct such Defects within a reasonable time after  notification from ORION and
after the Parties have followed the provisions of Article 13.1 above  (including
agreement on the existence of such Defect),  ORION may, by separate  contract or
otherwise,  correct  or  replace  such  items or  


<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


services, and, unless it is reasonably determined after investigation that ORION
directly  caused  the  Defect in  question,  or that the item or  service  is in
conformance with applicable specifications or requirements, the Contractor shall
pay to ORION the reasonable cost of such  correction or replacement.  The amount
payable by the Contractor  shall be verified at the  Contractor's  request by an
internationally recognized firm of accountants appointed by the Contractor, such
appointment  to be approved by ORION and such  approval  not to be  unreasonably
withheld  or  delayed.  The  costs  of such  verification  shall  be paid by the
Contractor  and shall be without  prejudice to the right of either Party to seek
arbitration  under  Article  30. The report of such  accountants  may be used by
either  Party in any  arbitration  proceeding  but shall not be binding upon the
arbitrators.  In such event, the Contractor,  if required by ORION, but pursuant
to the  arrangement  set forth in this Article 13.2,  shall  promptly repay such
portion of the Contract Price as is equitable in the  circumstances.  The amount
paid to ORION to correct  such Defect may be offset  against any payments due to
the Contractor by ORION under this ORION 2 Contract.

13.3

Without  limiting the obligations of the Contractor or the rights of ORION under
other  provisions  of the  ORION 2  Contract,  if the  data  available  from the
Launched ORION 2 Spacecraft or from other spacecraft of a similar class which is
being  built by the  Contractor  shows  that the ORION 2  Spacecraft  contains a
Defect,  the  Contractor  shall inform ORION of such Defect and shall,  promptly
upon the request of ORION, use its best efforts to take  appropriate  corrective
measures with respect to the Replacement  Satellite,  if any, which has not been
Launched so as to satisfactorily  eliminate from such Replacement Satellite such
Defects. The Contractor shall fulfill the foregoing  obligations at its own cost
and expense,  including all costs arising from charges for shipping,  insurance,
taxes  and  other  matters  associated  with  the  corrective  measures.  If the
Contractor  fails  to  take  such  corrective  measures  with  respect  to  such
Replacement  Satellite  which has not been Launched,  within a reasonable  time,
ORION may have any or all such Defects  corrected  through other means, in which
event the Contractor  shall make such  Replacement  Satellite which has not been
Launched and its component  parts  thereof  available as required and shall pay,
subject to the verification procedures set forth in Article 13.2, all reasonable
costs of such corrective measures.

In the event ORION makes such  corrections,  ORION may offset the amount paid to
have the Defects  corrected  against any  payments due the  Contractor  by ORION
under this ORION 2 Contract.

13.4

Without  limiting the obligations of the Contractor or the rights of ORION under
other  provisions of the ORION 2 Contract,  if the data  available  from another
spacecraft  of a  similar  class  that is being  built or has been  launched  by
Contractor shows that the ORION 2 Spacecraft  contains a Defect,  the Contractor
shall inform ORION of such Defect and shall, promptly upon the request of ORION,
use its best efforts  prior to Launch to take  appropriate  corrective  measures
with respect to the ORION 2 Spacecraft so as to  satisfactorily  eliminate  such
Defect from the ORION
<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


2 Spacecraft.  The Contractor shall fulfill the foregoing obligations at its own
cost and  expense,  including  all costs  arising  from  charges  for  shipping,
insurance,  taxes, and other matters associated with the corrective measures. If
the Contractor fails to take such corrective  measures with respect to the ORION
2 Spacecraft  within a reasonable  time after  request from ORION,  ORION may by
separate  contract  or  otherwise,  have  all  such  Defects  corrected  and the
Contractor  shall  pay,  subject  to the  verification  procedures  set forth in
Article 13.2, all reasonable costs of such corrective measures.

In the event ORION makes such  corrections,  ORION may offset the amount paid to
have the Defects  corrected  against any payments due the Contractor  from ORION
under this ORION 2 Contract.

13.5

Subject to Article 12, the Contractor  acknowledges and agrees that it shall not
be entitled to payment for any additional costs incurred as a consequence of any
Defect.  In addition to ORION's  rights under  Article 21, if  correction of any
Defect  causes a delay in the  Delivery of the ORION 2  Spacecraft,  despite the
best efforts of the Contractor to correct the Defect,  the provisions of Article
11.2 and Article 12, relating to liquidated damages, shall apply, as appropriate
in addition to the remedies in this Article 13.

13.6

After notification of a Defect to the Contractor,  the Parties may jointly elect
in writing,  pursuant to Article 27, not to require correction or replacement of
such  items or  services  or to waive  the  Defects  noted  for the  Replacement
Satellite, if any, which has not been Launched. In such event the Contractor, if
required by ORION but pursuant to the  arrangements  set forth in Article  13.2,
shall  repay  such  portion  of  the  Contract  Price  as is  equitable  in  the
circumstances.

13.7

Subject to the  provisions  of any  applicable  law,  the  Contractor  agrees to
enforce any  manufacturer's  warranty given to it in connection with any Work to
be provided under the ORION 2 Contract and the Contractor  shall assign to ORION
warranty protection or pledge to ORION any proceeds therefrom in respect of that
Work and other  items as are given to the  Contractor  by the  manufacturers  or
service providers.

13.8

Notwithstanding  any other  provision  of the ORION 2 Contract,  the  Contractor
shall advise ORION  immediately  by telephone  and confirm in writing any event,
circumstance or development which materially  threatens the quality of the ORION
2  Spacecraft  or  component  part  thereof as well as any  services or Data and
Documentation to be provided hereunder or the Delivery Dates established.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

13.9

For any Defect  which does not  adversely  affect the form,  fit,  useful  life,
reliability or function (i.e.,  operational  performance) of a Transponder,  the
Contractor  and ORION agree to  negotiate a  reasonable  resolution,  subject to
approval by any Financing  Entity,  which may not require  repair of the Defect,
but which may  require  reasonable  compensation  to ORION.  If the  Parties are
unable to reach an agreed  resolution  within  five (5)  Business  Days of ORION
receiving  notice  of the  Defect  from  the  Contractor  ("Notice  Date"),  the
Contractor  shall have the right to elevate  the  negotiations  to  Contractor's
Senior  Executive and to ORION's Senior  Executive.  Any  resolution  reached by
ORION's Senior  Executive and  Contractor's  Senior  Executive may be subject to
approval by the Financing Entities. In the event the Parties are unable to reach
an agreed  resolution or achieve approval of any Financing Entity within fifteen
(15)  Business  Days of the  Notice  Date,  ORION  shall  thereafter  be able to
exercise all of its rights under this Article 13.

14.  DISCLAIMER OF WARRANTIES,  LIMITATIONS OF LIABILITY AND INTER-PARTY  WAIVER
     OF LIABILITY

14.1

EXCEPT AS SPECIFICALLY PROVIDED IN THE ORION 2 CONTRACT, THE CONTRACTOR MAKES NO
WARRANTIES,  EXPRESS OR  IMPLIED,  WITH  RESPECT TO THE ORION 2 CONTRACT  OR THE
PERFORMANCE  OF THE  CONTRACTOR  HEREUNDER OR THE  EQUIPMENT  OR WORK  FURNISHED
HEREUNDER,  WHETHER  ARISING  UNDER LAW OR AT EQUITY.  ANY  IMPLIED  WARRANTY OF
MERCHANTABILITY OR FITNESS IS EXCLUDED, THE EXPRESS WARRANTIES OF THE CONTRACTOR
CONTAINED IN THE ORION 2 CONTRACT BEING EXCLUSIVE.

14.2

EXCEPT AS OTHERWISE  PROVIDED IN THE ORION 2 CONTRACT,  IN NO EVENT SHALL EITHER
PARTY OR A PARTY'S AFFILIATES AND ITS AND THEIR SUBCONTRACTORS AND ITS AND THEIR
OFFICERS,  EMPLOYEES AND AGENTS, BE LIABLE,  IN CONTRACT,  IN TORT, OR OTHERWISE
FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE ARISING AT ANY TIME OR
FROM ANY CAUSE WHATSOEVER,  INCLUDING SPECIFICALLY BUT WITHOUT LIMITATION,  LOSS
OF PROFITS OR REVENUE,  LOSS OF FULL OR PARTIAL USE OF ANY EQUIPMENT,  LOSSES BY
REASON OF OPERATION OF ANY DELIVERABLE ITEM AT LESS THAN CAPACITY,  DELAYS, COST
OF  REPLACEMENTS,  COST OF CAPITAL,  LOSS OF GOODWILL,  CLAIMS OF CUSTOMERS,  OR
OTHER SUCH DAMAGES.

14.3

THE TOTAL  LIABILITY  OF EITHER PARTY TO THE OTHER WITH RESPECT TO ALL CLAIMS OF
ANY KIND, INCLUDING WITHOUT LIMITATION  LIQUIDATED DAMAGES,  WHETHER AS A RESULT
OF BREACH OF CONTRACT,  WARRANTY,  STRICT  LIABILITY OR  OTHERWISE,  AND WHETHER
ARISING BEFORE OR AFTER DELIVERY OF ANY DELIVERABLE  ITEM, FOR ANY LOSS FROM THE
ORION 2 CONTRACT, OR FROM THE PERFORMANCE OR BREACH THEREOF, SHALL BE LIMITED TO
THE  REMEDIES SET FORTH IN THE ORION 2 CONTRACT AND SHALL IN NO EVENT EXCEED THE
CONTRACT PRICE TOTAL.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


14.4

14.4.1

All  operations at the launch site pursuant to this Agreement will be subject to
a  no-fault,   no-subrogation   inter-party  waiver  of  liability  under  terms
substantially similar to those set forth in Article 15.2 of the Launch Agreement
attached  hereto  as Annex B.  Prior to  commencement  of Launch  Services,  the
Contractor  will provide ORION with evidence  reasonably  satisfactory  to ORION
that each other entity ("Other  Users")  concurrently  conducting  operations at
such  launch  site,  including  the Launch  Vehicle  Agency,  has agreed to such
inter-party waiver of liability.

14.4.2

If either Party contracts or subcontracts with a third party to provide services
that  necessitate  the  Contractor's or  Subcontractor's  presence on the launch
site,  then such  Party  will also  ensure  that such  third  party  agrees to a
no-fault,  no-subrogation  inter-party  waiver of liability  and  indemnity  for
damages it sustains,  identical to the Parties'  respective  undertakings  under
this Article 14.4 and Annex B.

14.4.3

In the event that either ORION or the  Contractor  fails to obtain the aforesaid
inter-party waiver of liability and indemnity from their respective  contractors
or subcontractors, then such Party shall indemnify and hold the other Party, the
Other  Users  of  launch   services  and  their   respective   contractors   and
subcontractors  harmless from claims brought by such Party's subcontractors with
respect to matters that  otherwise  would have been  covered by the  inter-party
waiver of liability.

14.4.4

Notwithstanding  any other term or  provision  contained in the  Contract,  this
Article  14.4  shall  survive  the  completion  or  termination  of this ORION 2
Contract in any manner whatsoever.

14.4.5

The Parties will take such further  actions as may be required to implement  the
provisions of this Article 14.4,  including the execution of such agreements and
waivers as are  customarily  used with respect to  operations at the launch site
and are consistent with the provisions of this Article 14.4.

15.  ORION 2 SPACECRAFT IN-ORBIT PERFORMANCE WARRANTY

15.1     Total Amount at Risk

The Total  Amount at Risk  shall be  placed  at risk by the  Contractor  against
failure  by the  ORION 2  Spacecraft's  Transponders  to meet the  criteria  for
Satisfactorily  Operating  Primary  
<PAGE>


                            COMMERCIAL-IN-CONFIDENCE


Transponders as set forth in Article  15.3.1.  The Total Amount at Risk shall be
adjusted pro rata should the Contract Price be modified  pursuant to Article 5.2
or otherwise modified by an Amendment to the ORION 2 Contract.

15.2     In-Orbit Performance Warranty

15.2.1

The  Contractor  warrants that the ORION 2 Spacecraft  will provide  thirty (30)
Satisfactorily  Operating Primary Transponders at and after its Final Acceptance
pursuant to Article 9 hereof for a period of five (5) years  commencing upon the
date of its Final Acceptance (the "In-Orbit  Performance  Warranty Period").  To
the extent that the ORION 2  Spacecraft  fails to provide said  capability,  the
Contractor  shall pay ORION as damages  liquidated in their amounts and not as a
penalty,  an amount which shall be calculated as specified below up to the Total
Amount at Risk.

15.2.2

Upon Final Acceptance,  as defined in Article 9 hereof, the Total Amount at Risk
shall be earned and retained by the  Contractor  in the manner and to the extent
provided hereunder:

(a)      The Initial  Incentive Amount and the Monthly Amounts shall be adjusted
         pro rata should the Contract Price be modified  pursuant to Article 5.2
         or otherwise modified following the agreement between the Parties of an
         Amendment to the ORION 2 Contract pursuant to Article 27 hereof.

(b)      The  Initial  Incentive  Amount  shall be earned  and  retained  by the
         Contractor if, and only if, at Final Acceptance, the ORION 2 Spacecraft
         has  _________  Satisfactorily  Operating  Primary  Transponders  and a
         propellant  lifetime as calculated  in accordance  with Part 3(D) of at
         least the Maneuver  Lifetime less than one (1) year . Contractor  shall
         not be liable  for  damages  under  this  Article  15.2.2(b)  where its
         failure  to  meet  such  propellant  lifetime  requirement  is due to a
         malfunction  of the Launch  Vehicle  operation  or where its failure to
         meet the thirty (30) Satisfactorily  Operating Transponder  requirement
         is due to the  Launch  environment  exceeding  the  ORION 2  Spacecraft
         on-ground test requirements as specified in Part 3(C).

(c)      The Monthly Amount corresponding and assigned to each calendar month of
         operation  during the  In-Orbit  Performance  Warranty  Period shall be
         earned  and  retained  by the  Contractor  according  to the  number of
         Satisfactorily   Operating  Primary  Transponders  which  the  ORION  2
         Spacecraft has, as provided in Table 15.2 hereof.  Contractor shall not
         be liable for damages under this Article 15.2.2(c) to the extent of the
         number of Transponders  ("Launch-Damaged  Transponders") that, at Final
         Acceptance,  are not Satisfactorily  Operating  Transponders due to the
         Launch  environment  exceeding  the ORION 2 Spacecraft  on-ground  test
         requirements as specified in Part 3(C); in such case,  Table 15.2 shall
         be  adjusted  by  decreasing  the  number of  Satisfactorily  Operating
         

<PAGE>


                            COMMERCIAL-IN-CONFIDENCE


         Transponders  required to earn each specified proportion of the Monthly
         Amount by the number of Launch-Damaged Transponders.

                                   TABLE 15.2
<TABLE>
<CAPTION>

         Number of Satisfactorily Operating             Proportion of Monthly Amount Earned (%)
                Primary Transponders
- ---------------------------------------------------------------------------------------------------------
<S>                                                                      <C>   
                                                                         100.00
                                                                         93.33
                                                                         86.67
                                                                         80.00
                                                                         73.33
                                                                         66.67
                                                                         60.02
                                                                         53.33
                                                                         46.67
                                                                         40.00
                                                                         33.33
                                                                         26.67
                                                                         20.00
                                                                         13.33
                                                                          6.67
                                                                           0
- ---------------------------------------------------------------------------------------------------------
</TABLE>


(d)      In the event  that the  Initial  Incentive  Amount  shall not have been
         earned by the Contractor,  as specified in  subparagraph  (b) above, or
         any of the Monthly Amounts are not earned by the Contractor  during the
         relevant time period,  as specified in  subparagraph  (c) above,  those
         amounts (as  appropriate)  shall be repaid by the  Contractor to ORION.
         Payment  shall be due  thirty  (30)  Calendar  Days  after  the date of
         receipt  by the  Contractor  of a  telefaxed  invoice  (which  shall be
         followed by the airmailed original plus one copy) from ORION;  interest
         shall be paid (at the rate  specified in Article 43) on any amounts not
         paid when due.  Invoices  shall be  accompanied  by sufficient  data to
         support  ORION's claim.  ORION may offset any such payments not made by
         the Contractor  against any  outstanding  balance due under the ORION 2
         Contract.  The Contractor  shall be deemed to have accepted the invoice
         ten (10) Business Days after receipt of the invoice unless, within such
         time period,  it notifies ORION of a dispute.  The Contractor shall pay
         any undisputed part of an invoice.

15.3 Satisfactorily Operating Primary Transponder

15.3.1

If a Primary  Transponder  does not satisfy the requirements of a Satisfactorily
Operating Primary Transponder, but ORION nevertheless elects to use such Primary
Transponder for Revenue-earning purposes, then, where the Revenue (or equivalent
consideration)  received  by  ORION  for  such  Primary  Transponder  in any one
calendar monthly period is less than the Monthly Amount 
<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

at Risk for such Primary  Transponder,  the Contractor  shall, in the succeeding
month,  pay the  difference  between  the said  Monthly  Amount at Risk for such
Primary  Transponder  and ORION's  actual monthly  Transponder  Revenue for such
calendar  monthly  period.  In no event  shall any one  monthly  payment  by the
Contractor  under this Article 15.3.1 exceed the Monthly Amount at Risk for such
Primary  Transponder.  In the event that a Primary Transponder is determined not
to be a  Satisfactorily  Operating  Primary  Transponder  but is later  used for
Revenue-earning purposes, ORION agrees to advise the Contractor within seven (7)
Business Days after commencing such use.

15.3.2

For the purposes of this Article,  in determining  whether a Primary Transponder
is a Satisfactorily  Operating Primary  Transponder no account shall be taken of
any period of unavailability:

(a)      attributable  to ORION 2  Spacecraft  maintenance  activities,  station
         keeping  maneuvers,  payload  reconfiguration  for business purposes or
         station change maneuvers; or

(b)      less than one one-hundredth percent (0.01%) outage per month; or

(c)      attributable  to  communications  link fading due to  external  causes,
         including but not limited to weather; or

(d)      arising directly or indirectly as a consequence of any negligent act or
         omission  of  ORION  or  any  of its  agents,  assignees,  Consultants,
         employees, or customers; or

(e)      attributable to earth station sun blinding.

15.4

15.4.1

All  measurements,  computations  and analyses,  for the purpose of  determining
whether a Primary Transponder is a Satisfactorily  Operating Primary Transponder
shall be performed by ORION or its  Consultants,  provided  that the  Contractor
may,  at its  expense,  assist  in  determining  the  nature  of  anomalies  and
corrective  measures.  The Contractor  shall for this purpose be given access to
any data collected by ORION.

15.4.2

If ORION desires, following Final Acceptance, to make any changes to the ORION 2
Spacecraft's  in-orbit procedures,  ORION shall notify the Contractor in writing
of same and the  Contractor  shall  have  the  right to  approve  such  proposed
changes. The Contractor shall not unreasonably  withhold such approval and shall
work  with  ORION in good  faith  to  evaluate  the  proposed  changes  within a
reasonable time period.  Notwithstanding  Article 27.3 hereof, if the Contractor
reasonably concludes that in determining whether to approve the proposed changes
to the said in-orbit  procedures it will incur a cost in excess of Five Thousand
Dollars ($5,000), the 

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

Contractor  shall promptly  inform ORION within fifteen (15) Calendar Days as to
the estimated cost and a reasonable time for  completion.  If ORION requests the
Contractor to make such determination, the Contractor shall immediately commence
work  and  shall  be  entitled  to claim  and  shall  be paid by ORION  all such
reasonable  costs plus a profit of ten  percent  (10%).  In  addition,  if ORION
proceeds with a change in the in-orbit procedures without Contractor's  approval
or the Contractor  reasonably  considers  that a proposed  change after approval
would   adversely   affect  the  ORION  2  Spacecraft's   operational   ability,
characteristics,  lifetime,  propellant, power or station keeping abilities, the
Parties  shall  enter  good  faith  negotiations  to  determine  what  equitable
consideration in lieu of potential or actual lost In-Orbit  Performance Warranty
payments shall be provided to the Contractor.

15.5

Therights  and remedies  under this Article are exclusive for the failure of the
ORION 2 Spacecraft  and/or its Primary  Transponders  after Final  Acceptance to
meet the criteria for a  Satisfactorily  Operating  Primary  Transponder  and in
substitution  of any  other  rights  and  remedies  ORION  has under the ORION 2
Contract or otherwise at law as a result of such failure.

16.  SUBCONTRACTS

16.1

The Contractor has  represented  that in the performance of the Work required by
the  ORION  2  Contract,  it  will  be  necessary  for  the  Contractor  or  its
Subcontractors  to enter into the following Major  Subcontracts.  The Contractor
shall select the Major Subcontractors and ORION shall be provided with copies of
the  technical  content  of all Major  Subcontracts  and with a copy of the full
Launch  Agreement  promptly  upon  execution  thereof.   Initially,   the  Major
Subcontractors are as provided below:
<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

- --------------------------------------------------------------------------------
Name of Major             Location                     Description of Work
Subcontractor
- --------------------------------------------------------------------------------
Lockheed Martin           USA                          Launch Vehicle
NEC                       Japan                        KU Band Transponders
COMDEV                    Canada                       Multiplexers, Switching
__________*               __________                   Antennas
Fokker                    Netherlands                  Solar Array
__________*               __________                   Propellant Tank
__________*               __________                   Battery
__________*               __________                   Apogee Kick Motor



*Contractor shall comply
with Article 16.2 in selection
of these Major Subcontractors
- --------------------------------------------------------------------------------


16.2

In the event that the Contractor or a  Subcontractor  selects or has a necessity
to terminate any Major  Subcontract  or substitute  Subcontractors  on any Major
Subcontract,  the  Contractor  shall  consult with ORION and discuss any and all
such actions prior to implementation.  Subject to Article 16.3, ORION shall have
no right of prior approval of Contractor's actions.

16.3

In the event that the  Contractor  has a necessity to  terminate  or  substitute
Lockheed  Martin,  or NEC or COMDEV,  Limited the Contractor shall first consult
with and obtain the  approval of ORION.  If ORION does not approve  such actions
and the  Contractor  deems such actions to be necessary to meet its  performance
obligations under the ORION 2 Contract, then the Contractor may take such action
without ORION's approval.

16.4

In the event that the  Contractor  or a  Subcontractor  which has been awarded a
Major Subcontract has reason to waive, or to agree to, a deviation in any of the
technical  requirements  of any Major  Subcontract  which  will cause a material
impact on the  technical  parameters  of the ORION 2 Spacecraft  as set forth in
Part 3(A),  such  variations  shall be handled in accordance  with Part 3(B) and
shall  require a formal  Amendment to this ORION 2 Contract  pursuant to Article
27.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

16.5

Nothing in the ORION 2 Contract  shall be construed as creating any  contractual
relationship  between  ORION  and any  Subcontractor.  The  Contractor  is fully
responsible  to ORION for the acts and  omissions of  Subcontractors  and of all
persons  used by the  Contractor  or a  Subcontractor  in  connection  with  the
performance  of  the  Work  under  the  ORION  2  Contract.  Any  failure  by  a
Subcontractor  to meet its obligations to the Contractor  shall not constitute a
basis for Excusable  Delay,  except as provided in Article 12 hereof,  and shall
not relieve the Contractor from meeting any of its obligations under the ORION 2
Contract.

17.  INDEMNIFICATION

17.1

The  Contractor  shall  indemnify  and  hold  ORION,  its  officers,  employees,
Consultants,  and assignees ("ORION  Associates")  harmless from and against any
and all losses,  damages,  liabilities or demands  (including  reasonable  legal
fees)  arising out of suits or claims  brought by third  parties,  including the
employees and Consultants of ORION, the Contractor,  and its Subcontractors,  on
account of damage to  property  and injury to persons  (including  sickness  and
death),   resulting   from  any  act  or  omission  of  the  Contractor  or  its
Subcontractors  in the  performance of the Work, or an act or omission of ORION,
occurring at any installation of the Contractor or any Subcontractor, and at its
expense  shall  defend  any  suits or other  proceedings  brought  against  said
indemnitees,   on  account  thereof,  and  shall  pay  all  expenses  (including
reasonable  legal fees) and satisfy  all  judgments  which may be incurred by or
rendered  against them, or any of them, in connection  therewith;  provided that
ORION notifies the Contractor  within ten (10) Business Days, in writing,  after
ORION  management has actual notice of any such suit or a written threat of such
suit within twenty (20)  Business Days of such claim and permits the  Contractor
to  answer  the  claim or suit and  defend  the same and  gives  the  Contractor
authority and such  assistance  and  information as is available to ORION or the
defense of such claim or suit,  and  provided  further that ORION does not by an
act  (including  any admission or  acknowledgment  or omission)  prejudice  such
defense.  Any such assistance or information  which is furnished by ORION at the
written  request of the Contractor is to be at the  Contractor's  expense.  With
regard to suits or claims brought by or on behalf of employees or Consultants of
ORION, Contractor's  indemnification  obligations shall be limited to the amount
of  insurance  required  to  be  maintained  by  Contractor  under  Article  18.
Notwithstanding  the  foregoing,  in no  event  shall  the  Contractor  have any
indemnification liability regarding any claims or suits of any ORION customers.

17.2

ORION shall have a reciprocal  obligation  to indemnify  the  Contractor  to the
extent  described in Article 17.1,  except that such obligation  shall not apply
with  respect  to  claims  for acts or  omissions  of  ORION or its  Consultants
occurring at any installation of the Contractor or any Subcontractor.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

17.3

If the  Contractor  insures  against any loss or damage which the Contractor may
suffer in respect of which the  Contractor is required to indemnify  ORION or an
ORION  Associate  pursuant to Article  17.1,  it shall be a  condition  that the
Contractor  arrange  for the insurer to waive its right of  subrogation  against
ORION and every ORION  Associate.  ORION shall be entitled to require proof from
time to time that the  Contractor has complied with its  obligations  under this
Article. In the event that the Contractor does not comply with such obligations,
the indemnity referred to in Article 17.1 shall extend to any claim which may be
made by an insurer pursuant to an alleged right of subrogation.

17.4

In respect to every  insurance referred to in Article 18, the  Contractor  shall
provide  documentary  evidence (which may be the insurance policies  themselves)
that ORION's insurable interest has been noted by the Contractor's insurers.

17.5

Without  prejudice  to ORION's  rights  under  Article 26,  ORION shall hold the
Contractor  harmless  from and  against  any suit or  claims  which may arise in
connection  with the use,  operation,  performance,  nonperformance,  failure or
degradation  of the  ORION 2  Spacecraft  after  Final  Acceptance  or for other
Deliverable  Items after Delivery,  provided that the Contractor  notifies ORION
within ten (10) Business  Days in writing  after it receives  notice of any such
suit or within  twenty (20)  Business  Days of such claim and  permits  ORION to
answer the claim or suit and defend the same and gives ORION  authority and such
assistance and  information as is available to the Contractor for the defense of
such claim or suit, and provided  further that the Contractor does not by an act
(including any admission or acknowledgment or omission)  prejudice such defense.
Any such  assistance or information  which is furnished by the Contractor at the
written request of ORION is to be at ORION's expense. The foregoing shall not be
deemed to release the Contractor from any of its  obligations  under Articles 9,
15 and 26 hereof.

18.  INSURANCE

18.1 Insurance of the Work

18.1.1

Before the Contractor commences the Work, the Contractor shall have an insurance
policy  covering the ORION 2 Spacecraft and all component  parts thereof and all
materials  of  whatever  nature  used  or to be  used  in  completing  the  Work
(collectively,  the "Loss  Items")  against all risks,  loss or damage  prior to
Intentional  

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


Ignition  (including  coverage  against damage or loss caused by earth movement,
flood,  boiler,  turbine and machinery  accidents)  subject to normal "All Risks
Policy" exclusions. ORION and any Financing Entity shall be named as loss payee,
but only in relation to all risks, loss or damage to the Loss Items.  ORION, and
each  Financing  Entity,  if any,  shall be named  insured on any such policy in
relation  to all risks,  loss or damage to the Loss  Items.  The  details of the
insurer and the relevant extracts of the policy shall be submitted to ORION.

18.1.2

All items  shall be insured for a sum not less than their  replacement  value or
their price under the ORION 2 Contract, whichever is the greater. Such insurance
coverage  shall be  maintained by the  Contractor up to the point  ofIntentional
Ignition  of the ORION 2  Spacecraft  ordered by ORION  pursuant  to the ORION 2
Contract and shall provide (1) coverage for removal of debris,  and insuring the
structures,  machines,  equipment,  facilities,  fixtures  and other  properties
constituting a part of the project, (2) transit coverage, including ocean marine
coverage (unless insured by the supplier),  and (3) off-site  coverage  covering
any key equipment,  and (4) off-site coverage covering any property or equipment
not stored on the  construction  sites.  The  deductible  for all such insurance
shall not exceed Two Hundred Fifty Thousand Dollars ($250,000).

18.1.3

The  insurance of the Work as required by this Article 18,  whether  effected by
the Contractor or ORION,  shall not limit, bar or otherwise affect the liability
and  obligation  of  the  Contractor  to  complete  the  Work  and  Deliver  the
Deliverable  Items in  accordance  with the ORION 2 Contract.  The  Contractor's
insurers  shall  waive all rights of  subrogation  against  ORION save those for
which ORION indemnifies the Contractor pursuant to Article 17.2 hereof.

18.1.4

The  Contractor  agrees to assign to any  Financing  Entity the  proceeds of the
Contractor's  "All Risks Policy" with regard to any damage incurred on the ORION
2  Spacecraft  where such  damage  would  result in an  Excusable  Delay  which,
together with previous  Excusable  Delays  resulting  from damage covered by the
Contractor's  "All Risks Policy," would be greater than one hundred eighty (180)
Calendar Days.

18.2 Public Liability Insurance

18.2.1

Before the Contractor  commences the Work,  the  Contractor  shall have a Public
Liability  Policy of insurance.  The policy shall cover the  Contractor  and all
Subcontractors  employed  from  time  to  time  in  relation  to  the  Work  and
performance  of the ORION 2 Contract for their  respective  rights and interests
and cover their liabilities to third parties.

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


18.2.2

The  Contractor's  insurers shall waive all rights of subrogation  against ORION
save those for which ORION  indemnifies the Contractor  pursuant to Article 17.2
hereof.

18.2.3

The Public  Liability  Policy of insurance  shall be for an amount not less than
One Hundred Million Dollars  ($100,000,000) in respect of any one occurrence and
shall be effected with reputable insurers.  The policy shall be maintained until
all  Work  pursuant  to the  ORION  2  Contract,  including  remedial  work,  is
Delivered.  Such insurance shall not contain any exclusion which denies coverage
for third party  injuries to persons or damage to property of others arising out
of preparation of maps,  plans,  designs,  specifications  or the performance of
inspection  services  or  out of  any  other  services  to be  performed  by the
Contractor under the ORION 2 Contract.

18.2.4

ORION and the Financing  Entity, if any, shall be named as named insured on such
Public Liability insurance policy.

18.3 Insurance of Employees

18.3.1

Before  commencing the Work, the Contractor  shall insure against  liability for
death or injury to  persons  employed  by the  Contractor,  including  liability
imposed by statute and at common law.  The  insurance  coverage  shall be for an
amount  in the  greater  of (i) Ten  Million  Dollars  ($10,000,000)  or (ii) as
required by law, and shall be maintained  until all Work pursuant to the ORION 2
Contract,  including  remedial work, is Delivered.  The Contractor  shall ensure
that all Subcontracts contain a similar provision.



<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


18.3.2

The  Contractor's  insurers shall waive all rights of subrogation  against ORION
save those for which ORION  indemnifies the Contractor  pursuant to Article 17.2
hereof.

18.4     Comprehensive Automobile Liability

18.4.1

Before commencing the Work, the Contractor shall self-insure or Contractor shall
insure against  liability for claims of personal injury (including bodily injury
and death) and property damage covering all owned,  leased,  non-owned and hired
vehicles used at any of the  Contractor's  facilities in the  performance of the
Contractor's  obligations  under the ORION 2 Contract in an insurance amount not
less than Five Million Dollars  ($5,000,000)  per occurrence for combined bodily
injury and property damage.

18.4.2

The  Contractor's  insurers shall waive all rights of subrogation  against ORION
save those for which ORION  indemnifies the Contractor  pursuant to Article 17.2
hereof.

18.5 Launch Insurance

ORION shall have the  responsibility  to procure  Launch  Insurance.  Failure to
secure a binder for Launch  Insurance  by sixty (60) days before the Launch Date
shall be deemed an Excusable Delay,  which Excusable Delay shall extend from the
sixtieth  (60th) day before the Launch Date until the date such  insurance is so
secured and written verification thereof is provided to the Contractor.

18.6 Inspection and Provisions of Insurance Policies

18.6.1

Before the Contractor  commences the Work, and whenever  requested in writing by
ORION,  the  Contractor  shall produce  evidence that the insurance  required by
Articles  18.1,  18.2,  18.3 and 18.4 has been effected or is being  maintained.
Contractor  shall provide ORION with copies of all required  insurance  policies
and shall provide  ORION with written  notice no later than thirty (30) Calendar
Days before the expiration date of each such policy.

18.6.2

If, after being requested in writing by ORION to do so, the Contractor  fails to
produce  evidence of compliance with the insurance  obligations  within fourteen
(14)  Calendar  Days,  ORION may 


<PAGE>


                            COMMERCIAL-IN-CONFIDENCE


effect and maintain the insurance and pay the premiums. The amount paid shall be
a debt due from  Contractor to ORION and may be offset  against any payments due
the Contractor by ORION.

18.6.3

The Contractor  shall,  as soon as  practicable,  inform ORION in writing of any
occurrence that may give rise to a claim under a policy of insurance required by
Articles  18.1,  18.2,  18.3,  18.4 or 18.5 and shall  keep  ORION  informed  of
subsequent  developments  concerning the claim. The Contractor shall ensure that
Subcontractors  similarly  inform  ORION of any  such  occurrences  through  the
Contractor.  Each Party shall provide to the other Party any  information  which
may reasonably be required to prepare and present an insurance claim.


19.  REPLACEMENT SATELLITE

19.1

The  Contractor  agrees  to  provide  an  additional   satellite   ("Replacement
Satellite")  delivered in-orbit no later than twenty-one and one quarter (21.25)
months  after  receipt  of an order  from  ORION  (but in no case  earlier  than
thirty-four  and one quarter  (34.25)  months  after NPD).  Orion may place such
order at any time during the performance of the ORION 2 Contract but in no event
earlier than seven (7) months after receipt by the  Contractor of the applicable
Total  Advance  Funding in Article 19.2 or later than sixty (60)  Calendar  Days
after the ORION 2  Spacecraft  is  determined  to be a  Constructive  Total Loss
(should that event occur).  The in-orbit  delivery dates shall be conditioned on
ORION  having  ordered  and  simultaneously  paid for the  Long-Lead  Items (and
associated work) set forth in Article 19.2 by the dates set forth therein.


<PAGE>

                            COMMERCIAL-IN-CONFIDENCE
19.2

The Contractor agrees to deliver the  Replacement  Satellite on the schedule set
forth in  Article  19.1  provided  ORION  makes the  following  Advance  Funding
payments for Long-Lead Items on the schedule set forth below:

Fixed Charge at NPD -- _____________________________________________________

Replacement Satellite                                  Total Advance Funding
Order Period                  Variable Charge       (Fixed and Variable Charges)
- ------------                  ---------------       ----------------------------

ORION 2 NPD  
ORION 2 NPD + 6  months  
ORION 2 NPD + 12 months  
ORION 2 NPD + 18 months 
ORION 2 NPD + 21 months

19.3

The Contractor  shall furnish the  Replacement  Satellite in accordance with the
provisions  of the documents  which  constitute  the ORION 2 Contract,  with the
dates therein adjusted (if necessary) for the later timeframe of the Replacement
Satellite, and with the spacecraft test program revised as follows:

     o  Deletion of Sine  Vibration Test (except Test in the thrust-axis) 
     o  Deletion of EMC Test (however, the ESD Test is to be performed)
     o  Deletion of Separation Shock Test
     o  Rescheduling of adapter fit/fail check to Launch Site
     o  Reduction  of  Thermal  Vacuum  Test to one balance  phase only  
     o  Reduction in  levels/durations from "Protoflight" to "Flight Acceptance"

19.4

The firm  fixed  price for the  Replacement  Satellite  ("Replacement  Satellite
Price"), assuming an order had been placed by ORION on or before 1 October 1996,
is as follows:

(a)      In U.S. Dollars --The firm fixed price is  ____________________________
         _________________________________________________________________, or

(b)      The sum of the following currency amounts:

                    US$
                    GB
                    Yen
                    D Fl
                    Fr F
                    DM

After 1 October 1996, upon request of ORION, Contractor shall provide ORION with
a firm fixed price in U.S.  dollars for the  Replacement  Satellite at least ten
(10)  Calendar  Days  prior to the time of order of the  Replacement  Satellite,
which firm 

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

fixed price shall exceed the firm fixed price set forth in (a) above only to the
extent of currency fluctuations  subsequent to 1 October 1996; in any event, the
price        in        U.S.        dollars        shall        not        exceed
________________________________________________________________________________
_________________________________  excluding the inflation  adjustment described
in the second succeeding paragraph.

At the  time of order of the  Replacement  Satellite,  ORION  shall  advise  the
Contractor  which  of the  above  pricing  approaches  (U.S.  dollars  or sum of
currencies) it selects.

Where ORION orders the  Replacement  Satellite  afterE1 October 1996, the prices
set forth in this Article 19.4 shall be increased by a monthly  inflation factor
of  one-third  of one percent  (0.33%)  from  October 1996 to the month in which
ORION places the Replacement Satellite Order.

The Replacement  Satellite Price set forth in this Article 19.4 shall be reduced
by the amount of any Advance  Funding  payments made by ORION under Article 19.2
hereof.

The  Replacement  Satellite  Payment  Plan  and  Termination  Schedule  shall be
negotiated   between  the  Parties  prior  to  ORION  ordering  the  Replacement
Satellite;  the Payment Plan shall match Contractor's actual expenditure profile
so as to avoid prepayments and financing costs.

Selection of the launch vehicle and launch  services  contractor will be made by
ORION  (with  the  concurrence  of  Contractor)  in  sufficient  time to  permit
Replacement  Satellite  delivery on the schedule set forth in Article 19.1.  The
prices  for both such  items  will be  identified  and  agreed as a part of such
process.

ORION shall provide for launch insurance for the Replacement Satellite.

Except as otherwise required by the terms of this Article 19, contract terms for
the Replacement  Satellite will be identical to the ORION 2 Contract,  with risk
elements  (e.g.,  liquidated  damages for late  delivery  and  warranty  payback
incentives) adjusted to the change in price from the ORION 2 Spacecraft so as to
represent the same percentage risk.


19.5

Where the Advance Funding for the Replacement  Satellite has been paid by ORION,
but ORION fails to order the Replacement  Satellite by the time required in this
Article  19,  the  option  for the  Replacement  Satellite  shall no  longer  be
effective and  Contractor  shall  deliver to ORION,  within thirty (30) Calendar
Days of the 

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE

expiration  date of the option,  the  Long-Lead  Items set forth in Part 4, said
Long-Lead  items to be mutually agreed to by the Parties no later than 15 August
1996.

20.  TERMINATION FOR CONVENIENCE


20.1.1

ORION may, by notice in writing,  and without giving any reason or showing cause
therefor,  at any time prior to Launch of the ORION 2 Spacecraft,  terminate the
ORION 2 Contract  with respect to the Work in its  entirety  and the  Contractor
shall  immediately  cease  Work  accordingly,  and shall  similarly  direct  its
Subcontractors.

20.1.2

In the event of such termination under this Article, ORION shall be obligated to
pay  (i) to the  Contractor  an  amount  equal  to  the  sum of the  Termination
Liability Amounts for the ORION 2 Spacecraft and Launch Services as specified in
Part  1(B)  corresponding  to the  month in which  termination  occurs  less the
greater of the Advance  Payment or the sum of the  Milestone  Payments  actually
received  by the  Contractor,  provided  that,  where such  amount is a negative
number,  the  Contractor  shall pay such amount  promptly to ORION within twenty
(20) Calendar Days; and (ii) to the Launch Vehicle Agency an amount equal to the
Termination  Liability  Amount for the Launch  Vehicle as specified in Part 1(B)
corresponding to the month in which Termination occurs less any Progress Payment
actually received by the Launch Vehicle Agency.

The Contractor  shall submit an invoice to ORION within sixty (60) Calendar Days
after the termination date which shall specify the amounts due to the Contractor
and the Launch Vehicle Agency from ORION pursuant to this Article 20.1.2 and the
Contractor  and the Launch  Vehicle  Agency  shall  immediately  be  entitled to
payment  by  ORION  of  such  amounts  immediately  thereafter.  Payment  by the
Financing  Entities  of such  amount to the  Contractor  and the Launch  Vehicle
Agency shall relieve ORION from its obligation to make such payments.

20.2

The amount  payable by ORION to the  Contractor  pursuant to Article  20.1 shall
constitute  a total  discharge  of ORION's  liabilities  to the  Contractor  for
termination pursuant to this Article 20.

20.3

If the ORION 2 Contract  is  terminated  as  provided  in this  Article and full
payment made in accordance with Articles 20.1,  ORION may require the Contractor
to transfer to ORION, in the manner and to the extent  directed by ORION,  title
to and possession of any items comprising all or any part of the Work terminated
(including,  without limitation, all Work-in-progress and all 

<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


inventories), and the Contractor shall, upon the direction and at the expense of
ORION,  protect and preserve property in the possession of the Contractor or its
Subcontractors in which ORION has an interest and shall facilitate access to and
possession  by  ORION  of  items  comprising  all or any  part  of the  Work  so
terminated.

If ORION so requests or ORION has not taken delivery of property in which it has
an interest  within sixty (60) Calendar Days after  termination,  or such longer
period as is agreed between the Parties, the Contractor shall make a reasonable,
good faith  effort to sell such items and to remit any sales  proceeds to ORION,
less a deduction for costs of disposition reasonably incurred by the Contractor.

21.  REMEDIES FOR DEFAULT

21.1

(a)      If, at any time prior to Intentional Ignition in respect of the ORION 2
         Spacecraft  (but not  thereafter),  the  Contractor  has failed to make
         adequate  progress  toward the  completion  of the ORION 2  Spacecraft,
         including  where such failure is due to the ORION 2  Spacecraft  or any
         component  being damaged or destroyed  where such damage or destruction
         does not constitute an Excusable Delay,  such that the Contractor,  due
         to causes  related to the ORION 2  Spacecraft,  and  regardless  of the
         status of the Launch  Vehicle (or associated  services  provided by the
         Launch  Vehicle  Agency),  will  not be  able  to  Launch  the  ORION 2
         Spacecraft  by ninety (90)  Calendar  Days after the Delivery  Date (as
         such  date  may have  been  modified  in  accordance  with the  ORION 2
         Contract),  then ORION shall be entitled to deliver to the Contractor a
         Demand for  correction of the failure  within thirty (30) Calendar Days
         after  ORION  learns of such  failure.  Such  Demand  shall  state full
         details of the failure.  Within ten (10) Calendar Days after receipt of
         the Demand,  or such longer time as the Parties  agree,  the Contractor
         shall submit to ORION a Correction Plan for achieving Final  Acceptance
         not later than two hundred and seventy  (270)  Calendar  Days after the
         Delivery Date  provided that no Correction  Plan shall ever result in a
         change to a Delivery Date as specified in Article 8, unless the Parties
         agree in accordance  with Article 27. If the  Correction  Plan does not
         reasonably  correct  or  offset  the  effect  of the  failure  so as to
         demonstrate  that Final  Acceptance  can be achieved not later than two
         hundred and seventy  (270)  Calendar  Days after the ORION 2 Spacecraft
         Delivery Date,  ORION may reject the Correction Plan within thirty (30)
         Calendar Days after receipt,  in which case the Parties shall negotiate
         in good faith to develop a Correction  Plan which will be  satisfactory
         to both Parties.  If ORION does not reject the  Correction  Plan within
         thirty (30) Calendar Days after receipt,  the ORION 2 Contract shall be
         deemed  modified in accordance with the Correction Plan and the failure
         shall be deemed cured so long as Contractor  complies with the terms of
         such Correction Plan.

(b)      If, in addition to the Contractor's  failure to make adequate  progress
         toward completion of the ORION 2 Spacecraft due to the causes set forth
         in (a) above,  the  Contractor  is  

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         experiencing  any delays  other  than  Excusable  Delays  such that the
         Contractor  will not be able to Launch the ORION 2 Spacecraft  in order
         to achieve  Final  Acceptance  within three  hundred  sixty-five  (365)
         Calendar  Days after the ORION 2 Spacecraft  Delivery Date (as may have
         been  modified in  accordance  with this ORION 2 Contract),  then ORION
         shall be entitled to deliver to the  Contractor a Demand for correction
         of the failure  within  thirty (30) Calendar Days after ORION learns of
         such  failure.  Such Demand  shall state full  details of the  failure.
         Within ten (10)  Calendar  Days after  receipt of the  Demand,  or such
         longer time as the Parties agree,  the Contractor shall submit to ORION
         a Correction Plan for achieving  Final  Acceptance not later than three
         hundred and sixty-five (365) Calendar Days after the ORION 2 Spacecraft
         Delivery Date  provided that no Correction  Plan shall ever result in a
         change to a Delivery Date as specified in Article 8, unless the Parties
         agree in accordance  with Article 27. If the  Correction  Plan does not
         reasonably  correct  or  offset  the  effect  of the  failure  so as to
         demonstrate  that Final Acceptance can be achieved not later than three
         hundred and sixty-five (365) Calendar Days after the ORION 2 Spacecraft
         Delivery Date,  ORION may reject the Correction Plan within thirty (30)
         Calendar Days after receipt,  in which case the Parties shall negotiate
         in good faith to develop a Correction  Plan which will be  satisfactory
         to both Parties.  If ORION does not reject the  Correction  Plan within
         thirty (30) Calendar Days after receipt,  the ORION 2 Contract shall be
         deemed  modified in accordance with the Correction Plan and the failure
         shall be deemed cured so long as Contractor  complies with the terms of
         such Correction Plan.

21.2

In the event  (i) the  Contractor  does not  submit a  Correction  Plan to ORION
within ten (10)  Calendar  Days after  receipt of a Demand,  or (ii) the Parties
cannot develop a Correction Plan which reasonably corrects or offsets the effect
of the failure,  or which otherwise is satisfactory to both Contractor and ORION
within twenty (20) Calendar  Days after the  rejection of the  Correction  Plan,
ORION may, as its sole  remedy,  elect one of the  remedies set forth in Article
21.3 below,  and the Contractor  shall forthwith  notify ORION of completed Work
and all Work-in-progress  relating to the ORION 2 Spacecraft in respect of which
ORION  exercises  its rights  under this  Article.  ORION shall elect one of the
remedies specified in Article 21.3 (i) within forty (40) Calendar Days after the
Contractor's receipt of a Demand, if the Contractor fails to submit a Correction
Plan,  or (ii)  within  thirty (30)  Calendar  Days after the  deadline  for the
Parties' joint development of a satisfactory Correction Plan.

21.3 ORION's remedies as referenced in Article 21.2 are as follows:

(a)      ORION may  terminate  the ORION 2 Contract  with respect to the ORION 2
         Spacecraft  and may cause the ORION 2  Spacecraft  to be  completed  by
         another  party,  and as total  damages (in  addition to any  applicable
         liquidated  damages  for delay  levied  pursuant  to  Article 11 and/or
         Article 12 up to the date of termination) may charge the Contractor for
         any  reasonable  increased  cost  incurred in  connection  therewith in
         excess of the  Contract  Price as set forth in Article 5, as  adjusted;
         provided that the Contractor's liability under 

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                            COMMERCIAL-IN-CONFIDENCE

         this  paragraph  shall not  exceed the  Contract  Price as set forth in
         Article 5, as  adjusted  (without  regard to any  payments  made to the
         Contractor  to the date of  termination).  The  amount  payable  by the
         Contractor shall be verified at the Contractor's request and expense by
         an  internationally  recognized  firm of  accountants  appointed by the
         Contractor for that purpose subject to approval of ORION, such approval
         not to be  unreasonably  withheld  or  delayed.  A demand  for any such
         excess costs must be made within one (1) year after the termination and
         must be paid  within  sixty  (60)  Calendar  Days  of  receipt  of such
         verification.  In the event of election by ORION under this  paragraph,
         the Contractor  shall  complete the Launch Vehicle and Launch  Services
         portion  of the ORION 2  Contract  (as it may need to be  amended  as a
         consequence of ORION's election) and shall be liable for any reasonable
         additional  costs over and above the  Contract  Price for those  Launch
         Vehicle  and Launch  Services so affected as set forth in Article 5, as
         adjusted.  The  Contractor's  right to  verification  shall be  without
         prejudice  to the rights of either  Party under  Article 30. The report
         issued  by the  accountants  may be used by  either  Party  during  any
         arbitration  proceedings,  but the  report  shall not be binding on the
         arbitrator(s).  By notice in  writing  received  by ORION no later than
         sixty (60) Calendar Days after receipt of ORION's  invoice  pursuant to
         this  Article  21.3,  the  Contractor  may  dispute  the amount of said
         invoice. In the event that the Contractor does not so notify ORION that
         it disputes  ORION's  invoice,  the Contractor  shall be deemed to have
         accepted said invoice; or

(b)      ORION  may  terminate  the  ORION 2  Contract,  and in  which  case the
         Contractor shall pay ORION (i) all amounts  previously paid by ORION to
         the Contractor and (ii) applicable  liquidated damages for delay levied
         pursuant to Article 11 and/or Article 12 up to the date of termination.
         Title to the ORION 2  Spacecraft  shall  vest or  remain  vested in the
         Contractor.

21.4     

The remedies  provided in Article 21.3 are exclusive and in substitution for any
other  rights and  remedies  under the ORION 2 Contract or  otherwise  at law or
equity with respect to such defaults.  No termination  rights shall be available
to ORION in respect of the ORION 2 Spacecraft after the same has been Launched.

21.5

If the  Contractor  refuses or fails to observe or perform any material  duty or
obligation in the ORION 2 Contract, except those obligations covered in Articles
21.1 through 21.3 and other  obligations of the Contractor for which  particular
remedies are  specified  elsewhere  in the ORION 2 Contract as being  exclusive,
then ORION  shall be  entitled  to deliver to the  Contractor  a Demand  that it
correct the breach  within thirty (30)  Calendar  Days.  Such Demand shall state
fully the details of the breach.  Within ten (10) Calendar Days after receipt of
the  Demand,  or such longer time as the Parties  agree,  the  Contractor  shall
submit  to ORION a formal  Correction  Plan.  If the  Correction  Plan  does not
reasonably correct or offset the effect of the breach in a

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                            COMMERCIAL-IN-CONFIDENCE


timely manner,  ORION may reject the Correction Plan within thirty (30) Calendar
Days after receipt,  in which case the Parties shall  negotiate in good faith to
develop a Correction Plan which will be  satisfactory to both Parties.  If ORION
does not reject the  Correction  Plan  within  thirty (30)  Calendar  Days after
receipt,  the ORION 2 Contract shall be deemed  modified in accordance  with the
Correction  Plan and the  breach  shall be  deemed  cured so long as  Contractor
complies with the terms of such  Correction  Plan.  In the event the  Contractor
fails to submit a  Correction  Plan or the Parties  cannot  develop a Correction
Plan which  reasonably  corrects or offsets the effect of the breach in a timely
manner,  or which  otherwise is satisfactory to both Contractor and ORION within
twenty  (20)  Calendar  Days after the  Demand,  ORION  shall be entitled to any
remedies available at law or equity, subject to Article 14.2 hereof and pursuant
to the provisions of Article 30.

21.6 Contractor's Right to Terminate

21.6.1

(a)      The  Contractor  shall be entitled to terminate the ORION 2 Contract in
         whole or, where severable,  in part, if Contractor gives written notice
         to ORION of the  following  event and  (except as  provided  in Article
         6.1.1(e))  ORION fails to cure such event within  thirty (30)  Calendar
         Days after receiving such written notice: default in the payment of any
         Progress Payment or Milestone  Payment or Termination  Liability Amount
         when the same shall have become due and payable.

(b)      The  Contractor  shall be entitled to terminate the ORION 2 Contract by
         giving written notice to ORION where insurance proceeds are paid to any
         Financing Entity pursuant to Article 18.1.4 (All-Risk  Insurance),  and
         such  proceeds are not paid over to the  Contractor  within thirty (30)
         Calendar Days of receipt by any Financing Entity.

(c)      Except as specified in the ORION 2 Contract,  the Contractor  shall not
         have the right to terminate or suspend the ORION 2 Contract.

21.6.2

In the event of such termination,  the Contractor shall be entitled forthwith to
take any or all of the following actions:

(a)      treat the ORION 2 Contract as  terminated as to any or all of the items
         then   undelivered  or  services   unperformed  and  cease  or  suspend
         manufacture of any of the items to be supplied hereunder;

(b)      withhold  delivery of any of the items to be supplied  hereunder  until
         the  Contractor has received full payment under this Article and retain
         all sums then paid on account thereof;

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                            COMMERCIAL-IN-CONFIDENCE


(c)      cease or suspend  performance  of any of the services to be provided to
         ORION hereunder,  except those services which are specifically intended
         to be  provided  in  connection  with  a  termination  of the  ORION  2
         Contract; and

(d)      take payment of an amount equal to the Termination Liability Amount for
         the ORION 2  Spacecraft  for the  calendar  month  next  following  the
         calendar  month  in  which  the date of  termination  occurs,  less the
         greater of the Advance Payment or the sum of the Milestone and Progress
         Payments actually received by the Contractor, provided that, where such
         amount is a negative  number,  the Contractor  shall refund such amount
         promptly  to  ORION  within  twenty  (20)  Calendar  Days.   Where  the
         Contractor  is owed  money by ORION,  the  Contractor  shall  submit an
         invoice to ORION within sixty (60) Calendar Days after the  termination
         date which shall  specify the amount due to the  Contractor  from ORION
         pursuant to this Article 21.6 and the Contractor  shall  immediately be
         entitled to full payment by ORION  immediately  thereafter.  Payment by
         any  Financing  Entity of such amount to the  Contractor  shall relieve
         ORION from its obligation to make such payment.

         To the  extent  that full  payment  has been made  therefor,  ORION may
         require  the  Contractor  to transfer to ORION in the manner and to the
         extent  directed  by  ORION,  title  to and  possession  of  any  items
         comprising all or any part of the Work terminated  (including,  without
         limitation,   all  Work-in-progress  and  all  inventories),   and  the
         Contractor  shall,  upon  direction  of  ORION,  protect  and  preserve
         property at ORION's  expense in the possession of the Contractor or its
         Subcontractors  in which  ORION has an  interest  and shall  facilitate
         access to and  possession by ORION of items  comprising  all or part of
         the Work terminated. Alternatively, ORION may request the Contractor to
         make a  reasonable,  good faith  effort to sell such items and to remit
         any sales  proceeds to ORION less a deduction for costs of  disposition
         reasonably incurred by the Contractor for such efforts.

21.7

In all  instances,  the Party  terminating or claiming other remedies shall take
all  reasonable  steps  available  to it to mitigate any claim which it may have
against the defaulting Party.

21.8

Except  in the case of a default  under  Article  21.6.1,  Article  22.1(a)  and
Article  22.3(a),  prior to either Party  exercising  its right to terminate the
ORION 2 Contract  under this  Article,  the Parties  agree that  ORION's  Senior
Executive and the Contractor's  Senior  Executive,  and if mutually  agreed,  an
independent  third party, will meet within fifteen (15) Calendar Days of receipt
of  written  notice of the  dispute  by one  Party to the other  Party to try to
resolve the said  dispute.  If ORION's  Senior  Executive  and the  Contractor's
Senior Executive cannot agree on an appropriate  resolution of the dispute, then
the Parties shall resolve  their  dispute in accordance  with the  provisions of
Article 30.

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                            COMMERCIAL-IN-CONFIDENCE

21.9

   Nothing in this Article 21 shall affect ORION's rights to liquidated  damages
under Articles 11 or 12 hereof.

22.  TERMINATION IN SPECIAL CASES


22.1 The Contractor  shall be deemed to be in default under the ORION 2 Contract
     if:

(a)      it  is  declared   insolvent  or  bankrupt  by  a  court  of  competent
         jurisdiction,  is  the  subject  of  any  proceedings  related  to  its
         liquidation,  insolvency  or for the  appointment  of a receiver  or an
         administrative  receiver; or makes an assignment for the benefit of its
         creditors or enters into an agreement for the composition, extension or
         readjustment of all or substantially all of its obligations; or

(b)      the  Contractor  has  resorted to  fraudulent  or corrupt  practices in
         connection with its securing or implementing of the ORION 2 Contract.

22.2

If the  Contractor  is in  default  pursuant  to  Article  22.1,  then ORION may
terminate  the ORION 2 Contract in  accordance  with the  provisions  of Article
21.3.

22.3

ORION shall be deemed to be in default under the ORION 2 Contract if:

(a)      it  is  declared   insolvent  or  bankrupt  by  a  court  of  competent
         jurisdiction,  is  the  subject  of  any  proceedings  related  to  its
         liquidation,  insolvency  or for the  appointment  of a receiver  or an
         administrative receiver, makes an assignment for the benefit of all its
         creditors or enters into an agreement for the composition, extension or
         readjustment of all or substantially all of its obligations; or

(b)      it has resorted to fraudulent or corrupt  practices in connection  with
         its securing or implementing of the ORION 2 Contract.

22.4

If ORION is in  default  pursuant  to  Article  22.3,  then the  Contractor  may
terminate  the ORION 2 Contract in  accordance  with the  provisions  of Article
21.6.
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                            COMMERCIAL-IN-CONFIDENCE

23.1

Neither  the  Contractor,  nor ORION nor any of their  independent  consultants,
officers,  employees,  agents,  contractors,  Subcontractors or assignees, shall
publish any material (including articles,  films, brochures,  advertisements and
photographs),  or authorize  other persons to publish such material,  or deliver
speeches  about the Work without the prior written  approval of the other Party,
which approval shall not be unreasonably  withheld.  This  obligation  shall not
apply  to  ORION's  statement  or  publication  of  any  sort  relating  to  the
performance specifications or Statement of Work, which are intellectual property
of ORION and may be published as ORION so determines. The above obligation shall
also not apply to information which is publicly  available from any Governmental
agencies or which is or otherwise  becomes publicly  available without breach of
this  Agreement.  Notwithstanding  the foregoing,  the  Contractor,  ORION,  and
Subcontractors  may  make  (i) any  filings  that  the  Contractor,  ORION  or a
Subcontractor considers advisable or necessary under applicable securities laws,
including the Securities Act of 1933, as amended, the Securities Exchange Act of
1934, as amended,  the rules  applicable to the National  Market System,  or the
securities  laws  applicable to public  companies in the Republic of France (the
"French  Securities  Laws"), and the Parties shall comply with the provisions of
Article 24.5 with respect thereto, (ii) such other filings as may be required to
be made by any governmental agency or any administrative or judicial body before
which an action affecting the Contractor,  ORION, a Subcontractor,  any of their
Affiliates or the ORION 2 Spacecraft is pending, and (iii) such other filings as
may be required by applicable law.

23.2

The application  for approval to publish any material or deliver  speeches about
the Work shall be submitted to the other Party in writing and shall include full
particulars  of any  intended  publication.  Upon  receipt of the other  Party's
agreement in principle to the proposed  publication,  the applicant shall submit
for final  approval by the other Party any  material to be published in the form
and context in which it is intended to be used. The other Party may then approve
or decline to approve publication in whole or in part of the material and at its
discretion may specify a time for publication.

24.  CONFIDENTIALITY AND NONDISCLOSURE OF PROPRIETARY INFORMATION

24.1

During the  course of  performance  of the ORION 2 Contract  each Party may have
access to or receive information from the other, such as information  concerning
inventions,  techniques,  processes,  devices, discoveries and improvements,  or
regarding administrative,  marketing, financial or manufacturing activities. All
such  information,   including  any  materials  or  documents   containing  such
information,   whether  disclosed  orally  or  otherwise,  shall  be  

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                            COMMERCIAL-IN-CONFIDENCE

considered  proprietary  and  confidential  information of the disclosing  Party
("Proprietary Information").

24.2

(a)      For the purpose of this Article 24, "Proprietary Information" shall not
         include any information which the receiving Party can establish to have
         (i) become publicly known without breach of the ORION 2 Contract;  (ii)
         been given to the receiving Party by a third party who is not obligated
         to maintain confidentiality;  (iii) been independently developed by the
         receiving Party without reference to the Proprietary Information of the
         other, as established by documentary  evidence;  or (iv) been developed
         by the  receiving  Party  prior to the date of  receipt  from the other
         Party, as established by documentary evidence.

(b)      The  Contractor  agrees that it will not,  for the period  specified in
         Article  24.3(a),  disclose details of the Work to be provided to ORION
         hereunder,  to the extent that such  disclosure  would reveal  specific
         performance  information  regarding the ORIONSAT system and the ORION 2
         Spacecraft  or any other  information  which  would  materially  affect
         ORION's  commercial  interest  or the  commercial  use of the  ORIONSAT
         System  without the prior  written  consent of ORION which shall not be
         unreasonably  withheld.  Notwithstanding  the  foregoing,  the  Parties
         expressly agree that the Contractor shall have the  unrestricted  right
         at any time to use and to supply to third parties services or equipment
         similar or identical to any Work provided hereunder.

(c)      ORION  agrees  that it will not,  for the period  specified  in Article
         24.3(a),  disclose  Proprietary  Information  of the  Contractor to the
         extent  that  such  disclosure  would  reveal  information  to a direct
         competitor  of  the  Contractor  which  would  materially   affect  the
         commercial  interests  of the  Contractor  without  the  prior  written
         consent of the  Contractor  which shall not be  unreasonably  withheld.
         Contractor  agrees that for  purposes of this  Article 24, in the event
         that  TELESAT  and/or  COMSAT are engaged as  Consultants  to ORION for
         purposes  of the ORION 2  Contract,  they  shall  not be deemed  direct
         competitors to the Contractor.

24.3

(a)      Both during and for a period of three (3) years  after the  termination
         or  expiration  of the ORION 2 Contract,  each Party agrees to preserve
         and protect the  confidentiality of the Proprietary  Information of the
         other and all physical  forms  thereof,  whether  disclosed  before the
         ORION 2 Contract is signed or afterward.  Neither Party shall  disclose
         or disseminate Proprietary Information of the other to any third party,
         including employees,  independent consultants, or Subcontractors unless
         such party has (i) a need to know the  Proprietary  Information for the
         purpose of establishing, maintaining, operating, financing or marketing
         the ORIONSAT system, and (ii) has executed an agreement  obligating the
         party to maintain the  confidentiality  of the Proprietary  Information
         and limiting the use of the  Proprietary  Information to  establishing,
         maintaining,  operating,  financing or 

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                            COMMERCIAL-IN-CONFIDENCE

         marketing  the ORIONSAT  system.  Neither  Party shall use  Proprietary
         Information  of the other for its own benefit or for the benefit of any
         third  party,  except  as  specifically  provided  under  the terms and
         conditions of the ORION 2 Contract.

(b)      The  foregoing  shall not  affect any right of ORION in respect of Data
         and  Documentation  provided  for under the ORION 2 Contract  nor shall
         either Party be prevented from using the general know-how and abilities
         gained during the  performance  of the ORION 2 Contract for any purpose
         whatsoever.

24.4

(a)      Either  Party  shall  be  entitled  to  make  copies  of any  documents
         containing  Proprietary  Information  under the  terms  and  conditions
         outlined above.

(b)      ORION shall have the right at any time to remove,  obliterate or ignore
         any   proprietary/confidential   legend   placed   on   any   Data   or
         Documentation,  or  other  information  furnished  under  the  ORION  2
         Contract by the Contractor  where the legend is not in accordance  with
         the  ORION 2  Contract  but only  after  notice to the  Contractor  and
         reasonable opportunity for the Contractor to defend such legend.

24.5

Notwithstanding the foregoing, the Contractor, ORION and Subcontractors may make
(i) any  filings  that the  Contractor,  or ORION or a  Subcontractor  considers
advisable  or  necessary  under  applicable   securities  laws,   including  the
Securities  Act of 1933,  as amended,  the  Securities  Exchange Act of 1934, as
amended,  the rules applicable to the National Market System,  or the securities
laws  applicable  to public  companies  in the  Republic of France (the  "French
Securities Laws"),  (ii) such other filings as may be required to be made by any
governmental  agency or any  administrative  or judicial  body  before  which an
action  affecting  the  Contractor,   ORION,  a  Subcontractor,   any  of  their
Affiliates, or the ORION 2 Spacecraft is pending and (iii) such other filings as
may be  required  by  applicable  law.  Prior to making any  filings  containing
Proprietary  Information of the other Party,  the disclosing Party shall provide
the other Party reasonable  advance notice of the filing and cooperate with such
other  Party  in  obtaining   confidential   treatment   for  such   Proprietary
Information. In addition, if ORION or the Contractor desires for any information
to be contained within such a filing to be accorded  confidential  treatment and
not  disclosed  to the public,  it shall so indicate to the other Party and such
other Party shall cooperate with the disclosing Party in obtaining  confidential
treatment for such information.

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                            COMMERCIAL-IN-CONFIDENCE

25.      LICENSE RIGHTS


25.1

Except  as set  forth  in  Article  25.5,  the  Contractor  grants  to  ORION an
irrevocable, non-exclusive license to use and have used throughout the world any
software, and any invention covered by any patent, now or hereafter owned by the
Contractor,  or for which the  Contractor  has or may acquire the right to grant
such a license,  which software and/or invention is directly incorporated in any
Deliverable  Item or directly  employed in the use of any Deliverable Item under
the ORION 2 Contract. Such license shall:

(a)      be deemed to be fully  paid-up for the purposes of the ORION 2 Contract
         including use,  redesign or  modification  of any items delivered under
         the ORION 2 Contract; and

(b)      be on reasonable terms and conditions for other purposes.

Such license shall be transferable to the Financing Entities and, subject to the
Contractor's  approval,  any other entity,  such approval not to be unreasonably
withheld.

25.2

The Contractor shall, unless otherwise  authorized or directed by ORION, include
in each  Subcontract  hereunder a license  rights clause  pursuant to which each
Subcontractor  will  grant  rights  to ORION to the same  extent  as the  rights
granted by the Contractor in Article 25.1.

25.3

This  Article  shall  not be  construed  as  limiting  any  rights  of  ORION or
obligations of the Contractor under the ORION 2 Contract, including specifically
the  right  of  ORION,  without  payment  of  additional   compensation  to  the
Contractor, to use, have used, deliver, lease, sell or otherwise dispose of, any
item or any part thereof, required to be delivered under the ORION 2 Contract.

25.4

The Contractor  grants to ORION a non-exclusive  license to use the Contractor's
thermal  propellant  gauging  software  program (the "Software  Program") on the
terms set out hereunder:

(a)      such  license  shall be for the use of ORION and  ORION's  Consultants,
         advisors and agents in support of ORION's internal business and for use
         upon equipment notified in writing to the Contractor.

(b)      ORION  shall  not,   without  the  express  written   approval  of  the
         Contractor,  modify,  enhance,  copy,  download or reverse engineer the
         Software Program;  provided,  however, 

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                            COMMERCIAL-IN-CONFIDENCE


         ORION shall be permitted  to copy the Software  Program for archival or
         disaster recovery purposes.

(c)      ORION shall not assign, transfer, sell, lease, sub-license or otherwise
         deal in the Software Program;  provided,  however, the license shall be
         transferable  to the Financing  Entities with the prior written consent
         of the Contractor,  which consent shall not be unreasonably withheld or
         delayed.

26.      PATENTS, TRADEMARKS AND COPYRIGHTS

26.1

The  Contractor,  at its own  expense,  shall  defend  ORION  and its  officers,
employees,  agents,  consultants and  Subcontractors  and assignees  against any
claim or suit based on an  allegation  that the  manufacture  of any item in the
performance  of the  ORION 2  Contract,  or the  use,  lease or sale of any item
delivered or to be delivered  under the ORION 2 Contract,  infringes any letters
patent,  trademarks,  copyrights or other proprietary rights of any third party,
and shall pay any royalties  and other costs  related to the  settlement of such
claim or suit and the costs and damages,  including attorneys' fees, incurred as
the result of any such claim or suit;  provided that (i) ORION promptly notifies
the  Contractor  in writing  within ten (10)  Calendar Days of any such claim or
suit,  (ii)  permits the  Contractor  to answer the claim or suit and defend the
same,  (iii) gives the Contractor  authority and such assistance and information
as is  available  to ORION for the defense of such claim or suit,  and  provided
further  that  ORION  does  not  by  any  act   (including   any   admission  or
acknowledgment  or omission)  prejudice  such  defense.  Any such  assistance or
information which is furnished by ORION at the written request of the Contractor
is to be at the Contractor's expense.

26.2

If the manufacture of any item in the performance of the ORION 2 Contract or the
use,  lease or sale of any item  delivered or to be delivered  under the ORION 2
Contract,  is enjoined  as a result of a suit based on a claim of  infringement,
the Contractor shall resolve the matter so that the item is no longer subject to
such   injunction   or   replace   the  item  with  a   functionally-equivalent,
non-infringing item satisfactory to ORION.

26.3

ORION neither  represents  nor warrants that the  performance of any Work or the
manufacture,  use, lease or sale of any Deliverable Item will be free from third
party claims of infringement of any patents or other proprietary rights.


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27.      ORION 2 CONTRACT AMENDMENTS

27.1

Except as otherwise  specifically  provided,  the ORION 2 Contract  shall not be
modified  except by an  Amendment  to the ORION 2 Contract.  No purchase  order,
acknowledgment,  quotation or other similar document issued by either Party with
respect to the  subject  matter of the ORION 2 Contract  shall be deemed to be a
part of the ORION 2 Contract  or to modify the ORION 2 Contract  in any  respect
relating to the Work. No oral agreement or conversation with any officer,  agent
or employee of ORION or the Contractor,  either before or after execution of the
ORION 2  Contract  shall  affect  or  modify  any of the  terms  or  obligations
contained in the ORION 2 Contract.

27.2

At any time prior to  completion  and Delivery of all the Work under the ORION 2
Contract,  ORION may, in writing,  vary the Work with respect to the  unlaunched
ORION 2 Spacecraft within the general scope of the ORION 2Contract.  If any such
variation causes an increase or decrease in the cost of, or in the time required
for the performance of the ORION 2 Contract,  a change in the  specifications of
any Deliverable Item, or a change in the Aggregate  Predicted  Transponder Life,
the  Parties  shall  negotiate  in good  faith an  equitable  adjustment  to the
Contract Price or any other terms affected by such variation, or to the Delivery
Dates, or the  specifications,  which shall be formalized in an Amendment to the
ORION 2 Contract.  The Contractor shall not implement such variation,  and ORION
shall not be liable for any change in Contract  Price or Delivery Dates pursuant
to such  variation,  until and unless the Parties  have  entered  into a written
Amendment to the ORION 2 Contract.  Should  ORION  decide not to  implement  any
proposed  variation  of the  Work it  will  pay the  Contractor  its  reasonable
preparation costs in evaluating the same.

27.3

Atany time prior to  Delivery  of all the Work under the ORION 2  Contract,  the
Contractor  may, in writing,  request a variation of the Work within the general
scope  of the  ORION 2  Contract.  If  ORION  agrees  with  the  request  of the
Contractor  for variation of the Work and such  variation  causes an increase or
decrease in the cost of, or in the time  required  for, the  performance  of the
ORION 2 Contract, or a change in the specifications of any Deliverable Item, the
Parties  shall  negotiate in good faith an equitable  adjustment to the Contract
Price or any other terms affected,  or Delivery  Dates,  or the  specifications,
which  shall  be  formalized  in an  Amendment  to the  ORION  2  Contract.  The
Contractor shall not implement such variation, and ORION shall not be liable for
any change in Contract Price or Delivery Dates pursuant to such variation, until
and unless the Parties have entered into an Amendment to the ORION 2 Contract.

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27.4

At any time prior to Delivery  of all the Work under the ORION 2  Contract,  the
Contractor  may,  in  writing,  request  to  rearrange  the  Milestone  Payments
contained in Part 1(B) in order to reflect the current program status.  Any such
requested  change shall not become  effective  until and unless the Parties have
entered into an Amendment to the ORION 2 Contract which implements the requested
change.

28.      GOVERNMENTAL APPROVALS

Notwithstanding  any  other  Article  in  the  ORION  2  Contract,  the  Parties
understand and agree that certain restrictions, including those placed on access
to  Contractor's  and  Subcontractor's   plants  and  the  use,  sale  or  other
disposition of technical data,  and/or Work delivered under the ORION 2 Contract
may be imposed  by any  Government  which has  jurisdiction  over the Work.  The
Parties at all times,  both before and after completion of the ORION 2 Contract,
agree to be and remain bound by any such Government  requirements  pertaining to
the  technical  data or Work and  shall  cooperate  in  obtaining  all  required
consents and approvals.

ORION shall be given an opportunity to comment on any  application to the United
States Government by the Contractor prior to submission of such application. The
Contractor shall in good faith consider any comments made by ORION.

29.      RESPONSIBILITY FOR THE CONTRACT

29.1

The  Contractor,  by  having  submitting  a tender  to  perform  the Work and by
executing the ORION 2 Contract, shall be deemed:

(a)      to have satisfied itself as to:

         (i)    all the  conditions  and  circumstances  which  may  affect  the
                Contract Price, as defined in Article 5; and

         (ii)   the  feasibility of the Work to be performed in accordance  with
                the terms and conditions of the ORION 2 Contract;

(b)      to warrant that it has the necessary skills, facilities and capacity to
         perform the Work in  accordance  with the terms and  conditions  of the
         ORION 2 Contract.

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29.2

The Contractor  acknowledges  that it has fixed the Contract Price  according to
its own view and  assessment of all relevant  matters and no  additional  costs,
except as  otherwise  expressly  provided  for in the ORION 2 Contract,  will be
charged over and above the Contract Price.

29.3

By  executing  the ORION 2  Contract,  the  Parties  acknowledge  that they have
thoroughly  examined all parts of the ORION 2 Contract,  and agree that they are
complete,  consistent  and  accurate.  If the  Contractor  decides,  during  the
performance of the Work,  that any portion of the ORION 2 Contract is inaccurate
or  incomplete,  or that there are  inconsistencies,  it shall  notify  ORION in
writing  specifying full particulars and request  resolution  before  proceeding
with the Work in question.  If the Contractor  proceeds before  obtaining such a
resolution,  it does so at its own  risk and  expense,  and  whether  or not the
course  it has  chosen is  satisfactory  to ORION,  it shall be  entitled  to no
increase in the Contract Price or any extension of the Delivery Dates set out in
Article 8. If the Contractor proceeds with the Work before obtaining  resolution
of any inaccuracy,  incomplete  information or  inconsistency  and the course of
action it has pursued is not chosen by ORION,  it shall,  upon request by ORION,
promptly  at its own expense  follow the course of action  directed by ORION and
make all readjustments that may be required.

29.4

ORION shall within twenty (20) Calendar Days after written  notification  by the
Contractor  pursuant to Article 29.3 provide a response  and  resolution  of the
issues raised by the Contractor.

29.5

TheContractor  covenants  that  it will  cooperate  fully  with,  and  will  use
reasonable  efforts to ensure the full cooperation of, all  Subcontractors  with
ORION in doing all things reasonably necessary to achieve the due performance of
the ORION 2 Contract.

30.      DISPUTE RESOLUTION

30.1

If any dispute arises out of or in connection  with this ORION 2 Contract or the
breach  thereof,  including but not limited to any failure to reach agreement on
price,  schedule  or  performance,  any claim for  breach  of  contract  and any
question regarding its existence, validity or termination, such dispute shall be
finally  settled by  arbitration  in  accordance  with this Article 30. Prior to
commencing  arbitration  with  respect to any  dispute,  either Party shall give
written  notice to the  other of its  position  and  reasons  therefore  and may
recommend  corrective  action.  In the event  that  mutual  agreement  cannot be
reached  within ten (10)  Calendar  Days after  receipt of such 

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notice,  or such other period as may be  specified in the ORION 2 Contract,  the
respective  positions  of the  Parties  shall be  forwarded  to  ORION's  Senior
Executive and the Contractor's  Senior Executive,  for discussion and an attempt
shall be made by these  persons to reach mutual  agreement  within a further ten
(10) Calendar Days. To increase the probability of an expeditious  resolution of
the dispute, ORION's Senior Executive and Contractor's Senior Executive may meet
during the ten (10)  Calendar Day period and have each side present its position
and reasoning directly to them at such meeting.

30.2

If mutual  agreement is not reached through the above process,  either Party may
refer such dispute for final  determination to an arbitration  tribunal convened
in accordance with the terms of Articles 30.3 and 30.4.

30.3

The  arbitration  tribunal  shall  consist  of three  (3)  arbitrators,  one (1)
arbitrator to be appointed by ORION,  one (1)  arbitrator by the  Contractor and
the third arbitrator to be appointed by the former two (2) arbitrators; provided
that if a Party fails to appoint an  arbitrator  within the time  stipulated  in
Article 30.8,  the other Party having  appointed an  arbitrator,  such appointee
shall be the sole arbitrator.

30.4

Except as  otherwise  provided  herein,  the  arbitration  shall be conducted in
accordance with and subject to the rules of the American Arbitration Association
("AAA"),   including  the  AAA's  Supplementary   Procedures  for  International
Commercial  Arbitration  and shall be held in Washington,  District of Columbia,
USA. The Parties may be represented by persons of their choice.

30.5

The applicable law governing this  arbitration  proceeding  shall be exclusively
the United States Arbitration Act, 9 U.S.C., Section 1 et seq.

30.6

Except as provided in this Article 30.6 with respect to  enforcement of arbitral
awards, neither Party shall be entitled to maintain any action at law or suit in
equity in respect to matters  covered by this Article 30; the exclusive means of
resolving  all such matters shall be the  arbitration  process set forth in this
Article 30. The award of the arbitral tribunal shall be final and binding on the
Parties  hereto,  and,  upon  application  duly  made  to a court  of  competent
jurisdiction by a Party hereto, judgment thereon shall be entered in such court.

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30.7

Pending a decision  by the  arbitrators  as  referred  to in this  Article,  the
Contractor shall, unless directed otherwise by ORION in writing,  fulfill all of
its obligations  under the ORION 2 Contract,  including,  if and so far as it is
reasonably  practicable,  the  obligation  to take  steps  necessary  during the
arbitration  proceedings  to ensure that the Work will be  Delivered  within the
time stipulated or within such extended time as may be allowed under the ORION 2
Contract,  provided  always ORION shall  continue to make payments  therefore in
accordance with the ORION 2 Contract.

30.8

The  following  time  limits  shall be  observed  in respect to any  arbitration
referred to in this Article:

(a)      either  Party may demand  arbitration  in  writing  after the period of
         twenty (20) Calendar  Days referred to in Article 30.1 has expired,  or
         such other time period as may be specified in the ORION 2 Contract;

(b)      each Party shall  appoint its  arbitrator  within  twenty (20) Calendar
         Days of receipt of the AAA acknowledgment of a demand for arbitration;

(c)      the two appointed arbitrators shall appoint a third arbitrator within a
         further  twenty (20) Calendar Days from the time  stipulated in Article
         30.8(b) (unless the two arbitrators agree to an extension not to exceed
         an additional twenty (20) Calendar Days); and

(d)      any  decision by an  arbitrator(s)  referred to in Article 30.2 or 30.3
         shall  be made  within  six (6)  months  from the date on which a Party
         demands arbitration or within such extended period as the arbitrator(s)
         may allow.

30.9

The fees and expenses of the arbitrator(s) and AAA administrative fees and costs
shall be borne  equally by the  Parties.  Each Party shall bear the costs of its
own legal representation,  witnesses produced by such Party, document production
and other discovery expenses.

30.10

In the case of any  dispute  pursuant  to  Article  9  hereof,  the  arbitration
tribunal  shall  award  prejudgment  interest on any amount  which the  tribunal
determines is owing from one Party to the other,  such interest to be calculated
at an annual rate equal to the Prime Rate then in effect for each  Calendar  Day
from  forty-five  (45) Calendar Days following the date of loss or from the date
of the filing for  arbitration,  whichever is the  earlier,  until the date full
payment is made.

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31.      CONTRACT MANAGEMENT
31.1 In General

The Contractor  shall conduct  meetings,  reviews and analyses and shall prepare
and deliver reports and documentation as provided in Part 2(A).

31.2 Approvals and Acceptances

No approval,  acceptance,  waivers or  deviations  prior to Final  Acceptance by
ORION of any  action  or item  under  the ORION 2  Contract  shall  waive any of
ORION's  contractual  rights with regard to Final  Acceptance of any Deliverable
Item.

31.3 ORION 2 Contract Monitoring

31.3.1

During the  performance of the ORION 2 Contract,  the Contractor and ORION shall
each designate a person to be its Contract Program  Manager,  whose duties shall
be to  monitor  the  Work  and to act as  liaisons  between  the  Parties.  Such
monitoring by ORION shall not relieve the Contractor from performing the ORION 2
Contract in accordance  with its terms and shall not in any way detract from the
Contractor's position as an independent contractor.

31.3.2

Any Consultant who performs services on behalf of ORION shall have access to the
Work and data and may witness tests in the same manner as ORION,  as provided in
Article 7. ORION's Consultants shall execute non-disclosure  agreements with the
Parties and, as necessary, with Subcontractors.

31.3.3

ORION's  Consultants  shall have no  authority to change any part of the ORION 2
Contract, or to direct the Contractor or to bind ORION. Any changes to the ORION
2  Contract  shall be made only in  accordance  with  Article  27,  but  ORION's
Consultants  may participate in discussions  regarding such changes.  Any action
taken by the Contractor prior to the resolution of any such question shall be at
the Contractor's own risk and expense.

32.      SECURITY INTEREST AND FINANCIAL INFORMATION

The  Contractor  agrees to  cooperate  with ORION and  endeavor in good faith to
provide  security  interests  in the Work after ORION pays the Vendor  Financing
Takeout  Payment and periodic  financial  reports  concerning  the  Contractor's
financial status, if such are required by any 

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Financing  Entity,  and to  negotiate  in good  faith the terms  upon which such
security  interests  are  to be  provided  and  the  content/frequency  of  such
financial reports.

33.      ASSIGNMENT

33.1

The Contractor shall not, without the prior written approval of ORION and except
on such terms and  conditions  as are  determined  in writing by ORION,  assign,
mortgage,  charge or encumber the ORION 2 Contract or any part  thereof,  any of
its rights, duties, or obligations thereunder, the Work or any monies payable or
to become payable under the ORION 2 Contract,  to any person, except to a parent
or a wholly-owned  direct or indirect  subsidiary company of the Contractor,  or
for the purpose of corporate merger, recapitalization or reconstruction.

33.2

The  Parties  recognize  that this  ORION 2  Contract  may be  financed  through
external sources.  The Contractor agrees to work  cooperatively to negotiate and
execute such documents as may be reasonably required to implement such financing
(other than any document  requiring the  subordination  or delay of any payments
required to be paid  hereunder)  and agrees ORION shall have the right to assign
its rights,  duties or  obligations  under the ORION 2 Contract to ORION Network
Systems,  Inc., any ORION subsidiary,  and to any Financing  Entity,  subject to
prior notice to the Contractor.

33.3

Provided that the Contractor's rights under the ORION 2 Contract,  including the
ability to perform the Work, in the Contractor's  reasonable  judgment,  are not
and would not be  adversely  affected,  the  Contractor  shall not  withhold its
approval  to any  assignment,  mortgage,  charge  or  encumbrance  of any of the
rights, duties or obligations of ORION under the ORION 2 Contract.

33.4

Assignment of this ORION 2 Contract shall not relieve the assigning Party of any
of its  obligations  nor confer upon the  assigning  Party any rights  except as
provided in the ORION 2 Contract.

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34.      NOTICES AND DOCUMENTATION

34.1

Any notice or other communication  required or permitted pursuant to the ORION 2
Contract  including  invoices shall be  sufficiently  given if given in writing,
delivered  personally or by pre-paid  registered  air mail,  or by telex,  or by
facsimile to the following address:

In the case of ORION:

         ORION SATELLITE CORPORATION
         2440 Research Boulevard
         Suite 400
         Rockville, Maryland 20850
         United States of America

         For  the  attention  of  Dr.  Denis  Curtin,   Senior  Vice  President,
         Engineering and Satellite Operations, for technical matters and Richard
         H. Shay,  Vice  President of Corporate  and Legal  Affairs for contract
         matters or such other persons at such address as ORION may from time to
         time direct in writing for specific purposes.

         with a copy to:

         Shaw, Pittman,  Potts & Trowbridge 
         2300 N Street, N.W.  
         Washington,  DC 20037 
         United States of America

         For the  attention  of John F. Dealy for  notices  relating  to matters
         under Articles 6, 9, 15 and 21.

In the case of Contractor:

         MATRA MARCONI SPACE UK LIMITED
         Gunnels Wood Road
         Stevenage, Hertfordshire SG1 2AS
         England

         For the attention of Mr. B. Kirk,  ORION Project  Manager for technical
         or management matters For the attention of Mr. Arthur Blick, Commercial
         Manager

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34.2

A notice  given  either by certified  mail,  or by confirmed  facsimile or telex
followed the same day by the  original  document via  certified  mail,  shall be
deemed to be a notice in writing  for the  purpose  of the ORION 2 Contract  and
shall be deemed to have been given upon receipt by the sender of the answer-back
code of the recipient at the conclusion of the telex or by the actual receipt of
the letter or of the  facsimile  confirmed  by its  answer-back  code,  provided
transmission is completed  during normal business hours on a Business Day in the
place of the addressee and if it is not so completed then upon the  commencement
of normal  business hours on the next Business Day in the place of the addressee
after transmission is completed.

34.3

The Contractor  agrees that any communication or notice required or permitted to
be given by ORION to the  Contractor  which is given by the  Program  Manager or
Contracts Manager or has, prior to the execution of the ORION 2 Contract been so
given, shall be deemed to have been given by ORION.

34.4

Without  affecting the  provisions  of Article 34.2,  the Parties agree that all
correspondence  on contract  matters  shall,  if sent by confirmed  facsimile or
telex, be followed, as soon as reasonably  practicable after the sending of such
correspondence, by the original document via first-class mail.

35.      SEVERABILITY AND WAIVER

35.1

In the event any one or more of the  provisions  of the ORION 2 Contract  shall,
for any reason, be held to be invalid or unenforceable, the remaining provisions
of the ORION 2 Contract  shall be unimpaired,  and the invalid or  unenforceable
provision shall be replaced by a mutually acceptable enforceable provision which
comes  closest  to the  intention  of the  Parties  underlying  the  invalid  or
unenforceable provision.

35.2

A waiver of any breach of a provision  hereof  shall not be binding  upon either
Party  unless  the  waiver is in writing  and such  waiver  shall not affect the
rights of the Party not in breach with respect to any other or future breach.

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36.      COMPLIANCE WITH THE LAW, PERMITS AND LICENSES

36.1

The Contractor  shall, at its own expense,  comply with the  requirements of any
laws of any  place  in  which  any  part of the  Work is to be done and with the
lawful  requirements  of  public,  municipal  and other  authorities  in any way
affecting or applicable to any Work.

36.2

The Contractor shall at its own expense obtain any permits, licenses,  approvals
or certificates,  including any required for import or export, necessary for the
performance of the Work under the ORION 2 Contract. The Contractor shall, at its
own  expense,  perform  the  Work  in  accordance  with  the  conditions  of any
applicable permits or licenses,  approvals or certificates.  ORION agrees to use
its best  efforts in assisting  the  Contractor  to obtain any of the  documents
referred to above which are issued by a United States authority.

36.3

ORION  shall  not be  responsible  in any way for the  consequences,  direct  or
indirect,  of any violation by the  Contractor or its  Subcontractors,  or their
officers,  employees,  agents or  servants  of any law of a country in which the
Work is performed, or of any country whatsoever.

37.      APPLICABLE LAW; SUBMISSION TO JURISDICTION; APPOINTMENT OF   
         AGENT FOR ACCEPTANCE OF SERVICE; INTERPRETATION AND
         LANGUAGE

37.1

Except as  provided  in  Article  30.5  hereof,  the ORION 2  Contract  shall be
governed  by and  interpreted  in  accordance  with  the  laws of the  State  of
Maryland,  United  States of  America,  without  regard to the  conflict of laws
provisions thereof.

37.2

The Contractor appoints Powell,  Goldstein,  Frazer & Murphy,  attention J. Gail
Bancroft, 1001 Pennsylvania Avenue, N.W., Washington,  D.C. 20004, United States
of  America  as its agent for  acceptance  of  service  of process in the United
States.  Contractor shall notify ORION promptly in writing of the appointment by
Contractor of a new agent or of a change in the agent's address.

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37.3

In the ORION 2 Contract unless the context otherwise requires:

i)       words of any gender include any other gender;

ii)      the singular includes the plural and vice versa;

iii)     "person" includes a reference to a partnership, firm, or any other body
         of  persons,   company  or   organization   whether   incorporated   or
         unincorporated.

37.4

Any heading to this ORION 2 Contract  shall not be used in the  construction  or
interpretation of the ORION 2 Contract.

37.5

All  communications  between the Parties to the ORION 2 Contract shall be in the
English language.

37.6

Any  reference to  liquidation  damages means agreed  liquidated or  ascertained
damages and not a penalty.

38.      SURVIVAL

Any  provision  of the ORION 2 Contract  which can be  reasonably  construed  to
survive the  expiration or  termination  of the ORION 2 Contract for any reason,
including but not limited to the indemnification and confidentiality obligations
set forth herein,  shall survive such  expiration or  termination of the ORION 2
Contract.

39.      KEY PERSONNEL

39.1

The Contractor will assign properly  qualified and experienced  personnel to the
program  contemplated  under the ORION 2  Contract.  Personnel  assigned  to the
following positions shall be considered "Key Personnel":

a)       The Contractor's Project Manager 
b)       The Contractor's Contracts Manager

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c)       The Contractor's PA Manager
d)       The Contractor's Resident Manager at NEC
e)       The Contractor's Engineering Manager
f)       The NEC Project Manager
g)       The Contractor's AIT Manager

ORION shall have the right to approve the Contractor's Project Manager and NEC's
Project  Manager which approval shall not be  unreasonably  withheld or delayed.
Other Key Personnel shall not be assigned to other duties without the Contractor
giving prior written notice to and consulting with ORION.

The  Contractor  shall provide a chart to ORION of the Program Key Personnel and
shall keep such chart current.

39.2

Subject to ORION's  right to approve the selection of the  Contractor's  Project
Manager pursuant to Article 39.1, in the event that an employee  included in the
list of Key Personnel  becomes  unavailable for work under the ORION 2 Contract,
the  Contractor  shall  replace  him by a  person  of  substantially  equivalent
qualifications and abilities.

40.      PROGRESS REPORTS

40.1

The  Contractor  shall  render such  reports as to the  progress of the Work and
attend such  meetings  with ORION as specified in Part 2(A)  (Statement of Work)
and Part 2(B) (Contract Documentation Requirements List).

41.      LAUNCH VEHICLE AGENCY

41.1

41.1.1 The  Contractor  hereby  agrees that ORION shall have the right to direct
the  Contractor  to terminate  the Launch  Agreement at any time,  in which case
ORION shall be liable for the termination  charges  specified in the termination
liability  schedule set forth in Table 21.6 of the Launch Agreement and attached
hereto as Annex C.

41.1.2.  The Contractor  hereby agrees that ORION shall have the right to direct
the Contractor to terminate the Launch Agreement,  in whole or, where severable,
in part and for ORION to receive  directly from the Launch Vehicle Agency a full
refund of all amounts previously paid by ORION (excluding  postponement fees and
retanking  charges) (or where the Launch Vehicle Agency provides such amounts to
the  Contractor,  the  Contractor  shall pay over such  amounts to ORION 

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with no right of offset) where there has been more than three hundred sixty-five
(365)  cumulative  Calendar Days of Launch  postponement  by the Launch  Vehicle
Agency. In the event that, as a result of ORION exercising such right,  there is
any delay in the  performance  of the  Work,  such  delay  shall  constitute  an
Excusable  Delay and the  provisions  of Article 12 hereof shall be  applicable.
ORION's  right to direct the  Contractor  to terminate  the Launch  Agreement is
conditional  upon receipt of the Contractor's  written  notification of a Launch
postponement  or upon the  occurrence  of a single or  cumulative  delays by the
Launch Vehicle Agency which exceed three hundred sixty-five (365) Calendar Days.
ORION must direct the Contractor to terminate within sixty (60) Calendar Days of
the  first of the two  events  above or must  waive  its  right  to  direct  the
termination  of that Launch under this  Article  unless  further  delayed by the
Launch Vehicle Agency.

41.2

The Launch Vehicle Agency shall provide such insurance as required by the United
States  Department  of  Transportation  for loss or  damage  to  United  States.
Government  property  resulting from  activities to be carried out in connection
with Launches to be provided under the ORION 2 Contract. In consideration of and
conditioned upon a reciprocal waiver by the United States Government, both ORION
and the Contractor agree to waive any claim against the United States Government
or its agencies for any property damage or loss they sustain or for any personal
injury  to,  death of, or any  property  damage or loss  sustained  by their own
employees.

41.3

The Launch  Vehicle  Agency has executed  agreements  with various United States
Government agencies for use of Government-owned property and facilities relating
to the production of launch vehicles and launch operations at Cape Canaveral Air
Station  (CCAS) in  Florida.  ORION  agrees  that it will comply with the United
States  Government's  laws and  regulations  as they  relate to  ORION-furnished
property and personnel,  and those  agreements  relating  directly to the United
States expendable launch vehicle program. The Contractor will request the Launch
Vehicle  Agency to  furnish  copies of such  agreements  to ORION  upon  ORION's
request.  ORION will  indemnify the  Contractor  for any ORION  violation of the
laws,  regulations  or agreements as specified  herein.  In  furtherance  of the
foregoing,  the Parties shall, before Launch,  execute and deliver the Agreement
for Waiver of Claims and Assumption of Responsibility, the execution of which is
required by the United  States  Department of  Transportation  as a condition of
granting the  Contractor's  license to conduct launch  activities and launch the
ORION 2 Spacecraft.

41.4

On or  before  the  last  day  of  the  twenty-first  (21st)  month  after  NPD,
Contractor,  acting  upon the  advice  and  with the  consent  of  ORION,  shall
cooperate in good faith with the Launch Vehicle Agency to finalize the selection
of a Launch Date. The Parties  recognize  that, if the Contractor and the Launch
Vehicle  Agency cannot  mutually  agree upon a Launch Date,  the Launch  Vehicle

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                            COMMERCIAL-IN-CONFIDENCE


Agency may select the Launch  Date,  taking into  account all  available  launch
opportunities and the Contractor's requirements and interests.


42.      GUARANTEE OF CONTRACTOR OBLIGATIONS


The  Contractor  shall  provide an  unconditional  corporate  guarantee by Matra
Marconi Space NV and, if required,  other  entities  acceptable to any Financing
Entity,  in respect of its  obligations  under the ORION 2  Contract,  including
repayment,  if  required,  of the  Advance  Payment or any part  thereof.  Matra
Marconi Spare NV shall certify to ORION in writing on a quarterly  basis that it
has the financial  ability to repay any portion of the Advance  Payment that may
be required under the ORION 2 Contract and it shall promptly advise ORION of any
event or circumstance that may impair such ability.


43.      INTEREST


Except as set forth in Article 6.1.1(e)(iii), any interest due under the ORION 2
Contract shall be calculated in accordance with LIBOR plus three percent (3%).



IN WITNESS WHEREOF the President of ORION  SATELLITE  CORPORATION has hereto set
his hand for and on behalf of and as General  Partner of  International  Private
Satellite  Partners,  L.P.,  on the  25th  day of July  1996,  and the  Managing
Director  of MATRA  MARCONI  SPACE UK LIMITED has hereto set his hand for and on
behalf of MATRA MARCONI SPACE UK LIMITED on the 31st day of July 1996.


INTERNATIONAL PRIVATE SATELLITE                     MATRA MARCONI SPACE
  PARTNERS, L.P.                                     UK LIMITED



By: Orion Satellite Corporation, its General
      Partner


By: _____________________________                   By: ________________________





<PAGE>
                            COMMERCIAL-IN-CONFIDENCE


                                    ANNEX A

                          FORM OF REQUEST FOR PAYMENT
                 (Terms of this Form will be revised to conform
              to the requirements of the ORION 2 Credit Agreement)



[Date]


ORION SATELLITE CORPORATION
2440 Research Boulevard
Suite 400
Rockville, Maryland  20850
United States of America

Attention:  [                                ]


         RE:      Part 1(A) ORION 2 Spacecraft  Purchase  Contract,  dated as of
                  [...] (as amended, supplemented or modified from time to time,
                  the  "ORION  2  Contract"),   between   INTERNATIONAL  PRIVATE
                  SATELLITE PARTNERS, L.P., d/b/a ORION ATLANTIC, L.P. ("ORION")
                  and MATRA MARCONI SPACE UK LIMITED (the "Contractor")


Ladies and Gentlemen:


This  Request for  Payment is  delivered  to ORION  pursuant to Article 6 of the
ORION 2 Contract and  constitutes  the  Contractor's  request for payment in the
amount of $ [...] for Milestone  Payment No. ________,  and Progress Payment No.
__________.

Very truly yours,


MATRA MARCONI SPACE UK LIMITED


By:
Title:




<PAGE>

                            COMMERCIAL-IN-CONFIDENCE


                             Appendix I to Annex A

                         Form of Contractor Certificate
                 (Terms of this Form will be revised to conform
              to the requirements of the ORION 2 Credit Agreement)


Reference:        Milestones Payment No. _____
                  Progress Payment No. _____



                                                    ________________ ____, 19___


         RE:      ORION  2  Spacecraft  Purchase  Contract,  with  International
                  Private Satellite  Partners,  L.P. d/b/a Orion Atlantic,  L.P.
                  (as amended,  supplemented or modified and in effect from time
                  to time the "ORION 2 Contract")

ORION SATELLITE CORPORATION
2440 Research Boulevard
Suite 400
Rockville, Maryland  20850
United States of America

Attention:  [                                ]

Ladies and Gentlemen:

This  Certificate  is delivered to you in connection  with the ORION 2 Contract.
Each  capitalized  term used  herein and not  otherwise  defined  shall have the
meaning assigned thereto in the ORION 2 Contract.

We hereby certify, after due inquiry, that, as of the date hereof:

1.       The ORION 2  Contract  is in full  force and  effect  and except as set
         forth in  Schedule  I hereto,  has not been  amended,  supplemented  or
         otherwise modified,  and attached hereto are true, correct and complete
         copies  of all  Amendments  to  the  ORION  2  Contract  or  any  other
         modification  or  amendment  to the  ORION 2  Contract  not  heretofore
         delivered to the Financing Entity.

2.       Except as set forth in Schedule I hereto, we are not aware of any event
         that  has   occurred   or  failed   to  occur   which   occurrence   or
         non-occurrence,  as the case may be,  could  

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                            COMMERCIAL-IN-CONFIDENCE


         reasonably  be  expected to cause the date of Final  Acceptance  of the
         ORION 2 Spacecraft to occur later than the Delivery Date therefor.

3.       Except as set forth in Schedule I hereto,  no event or condition exists
         that  permits or  requires  us to  cancel,  suspend  or  terminate  our
         performance  under the ORION 2 Contract  or that  could  excuse us from
         liability for non-performance thereunder.

4.       Except with respect to amounts that are the subject of a dispute  (such
         amounts and such  disputes  being  described  in  reasonable  detail in
         Schedule II hereto),  all amounts due and owing to us have been paid in
         full  through  the  date  of  the  immediately  preceding  Construction
         Certificate  and are not overdue.  To the extent payment to us has been
         or will be made as  specified  in this  and the  immediately  preceding
         Contractor  Certificates,  there  are  and  will  be no  mechanics'  or
         materialsmen's   liens  except  Permitted  Liens  (as  defined  in  the
         Financing  Agreements)  on the  Project  (as  defined in the  Financing
         Agreements), the Collateral (as defined in the Financing Agreements) or
         on any  other  property  in  respect  of the work  which has or will be
         performed under the ORION 2 Contract.

5.       a.       The amount  contained in the Request for Payment  delivered to
                  you  concurrently  herewith  in  accordance  with the terms of
                  Article  6.1.1(b)  of the ORION 2 Contract  represents  monies
                  owed to us in respect of Milestone Payment No. _____.

         b.       The amount  referred to in paragraph (a) above was computed in
                  accordance with the terms of the ORION 2 Contract.

         c.       The Milestone to which Milestone  Payment No. ____ relates has
                  been completed in accordance with the ORION 2 Contract.*

6.       a.       The  amount  of  the  Request  for  Payment  delivered  to you
                  concurrently  herewith in  accordance  with the  provisions of
                  Article  6.1.1(a)  of the ORION 2 Contract  represents  monies
                  owed to us in respect of Progress Payment No. ____.

         b.       The amount  referred to in paragraph (a) above was computed in
                  accordance with the ORION 2 Contract.*

7.       a.       The amount  referred to in paragraph (a) above was computed in
                  accordance with the ORION 2 Contract.



<PAGE>
                            COMMERCIAL-IN-CONFIDENCE



8.       An amount of $_________ is due to us and  represents  monies owed to us
         in respect of the principal  amounts due and payable on the outstanding
         Note.*

Very truly yours,

MATRA MARCONI SPACE UK LIMITED


By:
Title:

*        Include when relevant




<PAGE>
                            COMMERCIAL-IN-CONFIDENCE
                                                                   SCHEDULE I to
                                                           Appendix I to Annex A


List of Exceptions:

Amendments to ORION 2 Spacecraft Purchase Contract:





Exceptions Affecting Final Acceptance Date:





Exceptions Affecting Contractor's Performance:



<PAGE>



                            COMMERCIAL-IN-CONFIDENCE
                                               
                                                                  SCHEDULE II to
                                                           Appendix I to Annex A


List of Disputes:





<PAGE>
                            COMMERCIAL-IN-CONFIDENCE



                                     ANNEX B


         INTER-PARTY WAIVER OF LIABILITY PROVISIONS IN LAUNCH AGREEMENT






<PAGE>
                            COMMERCIAL-IN-CONFIDENCE

    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information

                                    ANNEX B
                   
                          CONTRACT FOR LAUNCH SERVICES

         This Contract is made and entered into by and between  Lockheed  Martin
Commercial Launch Services,  Inc., a Delaware corporation,  having its principal
place  of  business  at  101  West  Broadway,   San  Diego,   California   92101
("Contractor")  and Matra  Marconi  Space UK Limited,  a company  organized  and
existing under the laws of England and Wales with its  registered  office at the
Grove, Warren Lane, Stanmore, Middlesex, HA7 4LY, England ("Customer").



                                   ARTICLE 1
                                  DEFINITIONS

Capitalized terms used and not otherwise defined herein shall have the following
meanings:

         Affiliate  means the  directors,  officers,  agents and  employees of a
Party.  This  definition  is for  identification  purposes only and shall not be
interpreted as  creating any privity of contract between Affiliates of one Party
and the other Party or its Affiliates.

         CSLA means the Commercial Space Launch Act, 49 U.S.C.  Sections 70101 -
70119, as amended.

         Contract means this instrument and all exhibits attached hereto, as the
same may be  amended  from time to time in  accordance  with the  terms  hereof,
including:

               Exhibit A - Statement of Work
               Exhibit B - Interface Control Document

         Contract Price means the Launch Service Price as set forth in Article 4
entitled "Contract Price."

         Effective  Date shall have the meaning set forth in Article 32 entitled
"Effective Date."

         Excusable  Delay  shall have the  meaning  set forth in  Paragraph  8.1
entitled "Excusable Delays Defined."






                                       1



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    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information


         Insured Launch  Activities  means the activities  carried out by either
Party or the  Related  Third  Parties of either  Party or by the  United  States
Government and operations  necessary  therefor or incidental thereto pursuant to
the terms of this Contract and, in the case of Launch  Services  licensed by the
CSLA, the launch license issued by the Office of Commercial Space Transportation
(or any successor  agency  thereto) to Contractor  under the CSLA to conduct the
Launch Services,  including the use of United States Goverment launch facilities
at the launch site used by Contractor and the Launch from the launch site.

         Intentional  Ignition means,  with respect to the Launch  Vehicle,  the
point in time during the launch  countdown when initiation of the gas generators
igniters firing command and firing of any of the gas generators igniters occurs.

         Interface  Control  Document or ICD means that document  referred to in
the Statement of Work attached or to be attached as Exhibit B to this Contract.

         Launch means Intentional Ignition followed by either (i) release of the
Launch  Vehicle from the launcher hold down  restraints  for the purpose of lift
off; or (ii) total loss or destruction of the Satellite or Launch Vehicle.

         Launch Date means the calendar date within the Launch Slot during which
the Launch is scheduled to occur,  as established  in accordance  with Article 6
entitled "Launch Schedule" and as such Launch Date may be adjusted in accordance
with Article 7 entitled "Launch Schedule Adjustments."

         Launch   Opportunity   means  an  adequate  time  period  during  which
Contractor,  in its  reasonable  judgment,  may  provide  a  Launch  Service  to
Customer, taking into account all relevant conditions, including but not limited
to, committments to other customers,  maintenance of appropriate clearance times
between  flights,  hardware  availability  and requirements of the United States
Government for range support.

         Launch  Service  means those  services to be provided by  Contractor to
Customer for a single  Launch as set forth in Exhibit A entitled  "Statement  of
Work."

         Launch Slot means a thirty (30) day period  during  which the Launch is
scheduled to occur, as set forth in Article 6 entitled "Launch  Schedule" and as
such Launch Slot may be adjusted in accordance  with Article 7 entitled  "Launch
Schedule Adjustments".


                                       2

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



         Launch Vehicle means the baseline  launch vehicle system  consisting of
an Atlas lower stage and Centaur upper stage connected by an interstage adapter,
the payload fairing and the payload adapter with separation system, collectively
identified as the Atlas ILAS  Standard with a performance  level as specified in
the Exhibit A Statement of Work.

         NPD means the date upon which all the  conditions  set forth in Article
32 have been met.

         Orion  means  Customer's  customer,   International  Private  Satellite
Partners, L.P.

         Party or Parties means Contractor, Customer or both.

         Related Third Parties means (i) the Parties'  Affiliates and customers;
(ii) the Parties' contractors, subcontractors and suppliers at any tier involved
directly or indirectly in the performance of this Contract, and their directors,
officers agents and employees;  (iii) entities involved with payload  processing
or  other  activities  in  the  payload  processing  facilities,  including  the
contractor providing the payload processing  facilities,  other customers of the
payload processing facilities  contractor,  and all employees and contractors of
those  contractors  and customers;  and (iv) parties having any right,  title or
interest,  whether  through  sale,  lease or service  arrangement  or otherwise,
directly or indirectly, in the Satellite or any transponder,  the Launch Vehicle
or the Launch Service.  This definition is for identification  purposes only and
shall not be interpreted as creating any privity of contract between  Affiliates
of one Party and the other Party or its Affiliates.

         Satellite  means  Customer-provided  Orion F2 satellite and  associated
property to be launched on the Launch Vehicle.

         Statement of Work or SOW means that  document  attached as Exhibit A to
this Contract.

         Termination  Charge  means the charge  calculated  in  accordance  with
Paragraph 21.6 entitled "Termination Charge."

         Third Party means any person or entity other than Contractor, Customer,
their Affiliates and Related Third Parties and the United States  Government and
its agencies, contractors or subcontractors involved in the Launch Services.


                                       3

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    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



                                   ARTICLE 14
                     COMPLETION OF CONTRACTOR'S OBLIGATION
                           TO PROVIDE LAUNCH SERVICES


The Launch  Services  to be provided  under this  Contract  shall be  considered
complete  upon Launch and the  submission  of data  required by the Statement of
Work, Sections 4 and 6.


                                   ARTICLE 15
                 EXCLUSION OF WARRANTY AND WAIVER OF LIABILITY
                        AND ALLOCATION OF CERTAIN RISKS


15.1 No Representations  or Warranties  Contractor has not made nor does it make
any  representation  or warranty,  whether written or oral,  express or implied,
including,  without limitation,  any warranty of design,  operation,  condition,
quality,  suitability  or  merchantability  or  of  fitness  for  use  or  for a
particular  purpose,  absence  of  latent  or  other  defects,  whether  or  not
discoverable,  with regard to the success of the Launch or other  performance of
the Launch  Service  hereunder.  Without  limited or creating  exceptions to the
reciprocal  waiver of liability  set forth in this Article 15, or the  exclusive
remedies  set forth in Article 18, in no event shall  either  Party be liable to
the other and to persons  claiming by or through  such Party under any theory of
tort,  contract,  strict  liability,  negligence  of any type or under any other
legal or equitable  theory for indirect,  special,  incidental or  consequential
damages,  including without limitation,  costs of effecting cover, lost profits,
lost revenues or costs of recovering a payload or the Satellite,  arising out of
or relating to this Contract.








                                       15

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information

15.2  Waiver of Liability
      -------------------


      15.2.1  Contractor  and Customer  hereby  agree to a reciprocal  waiver of
      liability  pursuant  to which  each  Party  agrees not to bring a claim in
      arbitration  or  otherwise  or sue the  other  Party,  the  United  States
      Government  or Related  Third  Parties of the other Party for any property
      loss or damage it  sustains  and any  property  loss or  damage,  personal
      injury  or  bodily  injury,  including  death,  sustained  by  any  of its
      Affiliates, arising in any manner in connection with the performance of or
      activities  carried out pursuant to this Contract,  or other activities in
      or around the launch site or Satellite  processing  area, or the operation
      or  performance  of the Launch  Vehicle or the  Satellite.  Such waiver of
      liability  shall  also  extend to any  indirect,  special,  incidental  or
      consequential  damages or other loss of revenue or business injury or loss
      including but not limited to lost profits or costs of recovering a payload
      or the  Satellite  resulting  from any  delay in  Launch,  damages  to the
      Satellite  before,  during  or after  Launch  or from the  failure  of the
      Satellite to reach its planned orbit or operate properly.

      15.2.2 Claims of liability  are waived and released  regardless of whether
      loss,  damage or injury  arises from the acts or  omissions,  negligent or
      otherwise,  of either Party or its Related Third  Parties.  This waiver of
      liability shall extend to all theories of recovery,  including in contract
      for property loss or damage, tort, product liability and strict liability.
      In no event shall this waiver of liability prevent or encumber enforcement
      of the  Parties'  contractual  rights  and  obligations  to each  other as
      specifically provided in this Contract.

      15.2.3 Contractor and Customer shall each extend the waiver and release of
      claims of  liability  as provided in  Paragraphs  15.2.1 and 15.2.2 to its
      Related Third Parties  (other than  employees,  directors and officers) by
      requiring  them to waive and release all claims of liability they may have
      against the other Party,  its Related  Third  Parties,  the United  States
      Government and its  contractors  and  subcontractors  at every tier and to
      agree to be responsible  for any property loss or damage,  personal injury
      or bodily injury, including death, sustained by them arising in any manner
      in connection with the  performance of or activities  carried out pursuant
      to this Contract, or other related activities in or around the launch site
      or Satellite  processing  area,  or the  operation or  performance  of the
      Launch Vehicle or the Satellite.


                                       16

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



      15.2.4 The waiver and release by each Party and its Related  Third Parties
      of claims of  liability  against  the other  Party and the  Related  Third
      Parties of the other Party extends to the successors and assigns,  whether
      by subrogation  or otherwise,  of the Party and its Related Third Parties.
      Each Party shall obtain a waiver of  subrogation  and release of any right
      of recovery against the other Party and its Related Third Parties from any
      insurer  providing  coverage  for the  risks of loss for  which  the Party
      hereby waives claims of liability  against the other Party and its Related
      Third Parties.

      15.2.5 In the event of any  inconsistency  between the  provisions of this
      Paragraph 15.2 and any other  provisions of this Contract,  the provisions
      of this Paragraph 15.2 shall take precedence.


15.3  Indemnification - Property Loss and Damage and Bodily Injury
      ------------------------------------------------------------

      15.3.1 To the extent that such  liability  is not covered by an  insurance
      policy of either  Contractor  or Customer,  Contractor  and Customer  each
      agree to defend,  hold  harmless  and  indemnify  the other  Party and its
      Related Third Parties, for any liabilities,  costs and expenses (including
      attorneys'  fees,  costs  and  expenses),  arising  as a result  of claims
      brought by Related Third Parties of the  indemnifying  Party, for property
      loss or  damage,  personal  injury  or  bodily  injury,  including  death,
      sustained  by  such  Related  Third  Parties,  arising  in any  manner  in
      connection  with the  activities  carried out  pursuant to this  Contract,
      other activities in and around the launch site or the Satellite processing
      area,  or the  operation  or  performance  of the  Launch  Vehicle  or the
      Satellite.  Such  indemnification  shall extend to any claim for indirect,
      special,  incidental, or consequential damages or other loss of revenue or
      business  injury  or loss  resulting  from  any loss of or  damage  to the
      Satellite  before or after launch or from the failure of the  Satellite to
      reach its planned orbit or operate properly.

      15.3.2 To the extent that such claims of liability  are not covered by the
      third party  liability  insurance  referred to in Paragraph  16.1 entitled
      "Third  Party  Liability  Insurance,"  or an  insurance  policy  of either
      Contractor  or  Customer  or  eligible  for  payment by the United  States
      Government (as provided in Paragraph 16.2 entitled  "Insurance Required by
      Launch  License"),  Contractor  will defend,  hold  harmless and indemnify
      Customer  and its  Related  Third  Parties for any and all claims of Third
      Parties,  for property loss or damage,  personal  injury or bodily injury,
      including  death,  arising in any manner from the operation or performance
      of the Launch Vehicle.


                                       17

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    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



      15.3.3 To the extent that such claims of liability  are not covered by the
      third party  liability  insurance  referred to in Paragraph  16.1 entitled
      "Third  Party  Liability  Insurance,"  or an  insurance  policy  of either
      Contractor  or Customer or not paid by the United  States  Government  (as
      provided  in  Paragraph  16.2  entitled   "Insurance  Required  by  Launch
      License,")  Customer will defend,  hold harmless and indemnify  Contractor
      and its Related Third Parties for any and all claims of Third Parties, for
      property  loss or  damage,  personal  injury or bodily  injury,  including
      death,  arising in any manner from the  operation  or  performance  of the
      Satellite  or  from  any  claim  for  indirect,   special,  incidental  or
      consequential  damages or other loss of revenue or business injury or loss
      resulting  from any loss of or  damage  to the  Satellite  before or after
      Launch or from the failure of the  Satellite to reach its planned orbit or
      operate properly.


      15.3.4  Notwithstanding  Paragraphs  15.3.2 and 15.3.3  above,  Contractor
      shall not be obligated to defend,  hold harmless or indemnify Customer for
      any claim brought by a Third Party  against  Customer  resulting  from any
      damage  to or loss of the  Satellite,  whether  sustained  before or after
      Launch and whether due to the operation,  performance,  non-performance or
      failure of the Launch  Vehicle or due to any other causes.  Customer shall
      defend,  hold harmless and indemnify  Contractor for any claims brought by
      Third Parties  against  Contractor for damage to or loss of the Satellite,
      whether  sustained before or after Launch or whether due to the operation,
      performance,  non-performance  or failure of the Launch  Vehicle or due to
      other causes.


      15.3.5 The  indemnification  provided by this  Paragraph 15.3 for property
      loss or damage,  personal injury or bodily injury extends to all damage or
      injury  regardless of whether such loss,  damage or injury arises from the
      acts or omissions, whether negligent or otherwise, of either Party.


      15.3.6   The  right  of  either   Party  or  Related   Third   Parties  to
      indemnification  under this  Article  is not  subject  to  subrogation  or
      assignment and either Party's obligation set forth herein to indemnify the
      other Party or Related Third  Parties  extends only to that Party or those
      Related  Third  Parties  and not to others who may claim  through  them by
      subrogation, assignment or otherwise.


                                       18
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    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



15.4  Indemnification by United States Government
      -------------------------------------------

      15.4.1 The Parties recognize that under the CSLA and subject thereto,  the
      Secretary of  Transportation  shall,  to the extent provided in advance in
      appropriations   acts  or  to  the  extent  there  is  enacted  additional
      legislative  authority  to provide for the payment of claims,  provide for
      the  payment  by  the  United  States   Government  of  successful  claims
      (including  reasonable  expenses of litigation or  settlement)  of a Third
      Party against Contractor or subcontractors, or Customer or its contractors
      or  subcontractors,  resulting from  activities  carried out pursuant to a
      license issued or transferred under the CSLA for death,  bodily injury, or
      loss of or damage to property  resulting from activities carried out under
      the license,  but only to the extent that the aggregate of such successful
      claims arising out of the Launch:

      15.4.1.1    is in excess of the amount of  insurance or  demonstration  of
                  financial  responsibility  required  of  Contractor  under its
                  license issued pursuant to the CSLA; and
     
      15.4.1.2    is not in excess of the level that is $1,500,000,000 (plus any
                  additional sums necessary to reflect inflation occurring after
                  January 1, 1989) above the  required  amount of  insurance  or
                  demonstration  of  financial  responsibility  required  by the
                  CSLA.

      15.4.2  Contractor makes no representation or warranty that any payment of
      claims by the United States  Government will be available  pursuant to the
      CSLA. Contractor's sole obligation is the good faith effort to obtain such
      payment as may be available from the United States Government.

15.5  Indemnification - Intellectual Property Infringement
      ----------------------------------------------------

      15.5.1 Contractor shall defend,  hold harmless and indemnify  Customer and
      its  Related  Third  Parties  for any and all  claims  resulting  from the
      infringement, or claims of infringement, of the patent rights or any other
      intellectual  property  rights  of a Third  Party,  that  may  arise  from
      Contractor's provision of Launch Services.

      15.5.2 Customer shall defend,  hold harmless and indemnify  Contractor and
      its  Related  Third  Parties  for any and all  claims  resulting  from the
      infringement, or claims of infringement, of the patent rights or any other
      intellectual  property  rights of a Third  Party,  that may arise from the
      design, manufacture, launch or operation of Customer's Satellite.

                                       19

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    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information

15.6 Rights and Obligations  The rights and obligations  specified in Paragraphs
15.3 and 15.5 shall be subject to the following conditions:

      15.6.1 The Party seeking  indemnification  shall promptly advise the other
      Party in  writing  of the  filing of any suit,  or of any  written or oral
      claim alleging an  infringement  of any Related Third Party's or any Third
      Party's rights, upon receipt thereof, and shall provide the indemnitor, at
      the  indemnitor's  request  and  expense,  with  copies  of  all  relevant
      documentation.

      15.6.2 The Party seeking  indemnification shall not make any admission nor
      shall it reach a  compromise  or  settlement  without  the  prior  written
      approval of the other  Party,  which  approval  shall not be  unreasonably
      withheld or delayed.

      15.6.3 The Party required to indemnify, defend and hold the other harmless
      shall  assist in and shall have the right to assume,  when not contrary to
      the  governing  rules of  procedure,  the  defense of any claim or suit or
      settlement   thereof,   and  shall  pay  all  reasonable   litigation  and
      administrative costs and expenses,  including attorney's fees, incurred in
      connection with the defense of any such suit,  shall satisfy any judgments
      rendered by a court of  competent  jurisdiction  in such suits,  and shall
      make all settlement payments.

      15.6.4 The indemnitee  may  participate in any defense at its own expense,
      using counsel reasonably acceptable to the indemnitor, provided that there
      is no conflict of interest and that such  participation does not otherwise
      adversely affect the conduct of the proceedings.

15.7 Inconsistency  with Government  Agreement In the event of any inconsistency
between any provision of this Article 15 or Article 16 entitled  "Insurance" and
the Agreement for Waiver of Claims and Assumption of Responsibility  referred to
in Paragraph 13.1, this Article 15 shall take precedence as between the Parties.

15.8 Survival of  Obligations  All  indemnities,  obligations,  liabilities  and
payments provided for in this Article 15 shall survive, and remain in full force
and effect, notwithstanding the expiration or other termination of this Contract
and,  subject to the limitations  set forth in this Article 15,  notwithstanding
any other provision of this Contract to the contrary.


                                       20
<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



15.9 Limitation of Liability Except for the obligation to indemnify  provided in
Paragraph 15.3.2,  Contractor's liability to Customer for any claim that has not
been waived or released  pursuant to the terms of this  Article 15 and any claim
to which the  remedies  are not  limited  pursuant  to the terms of  Article  18
entitled  "Remedies and  Limitations on Remedies"  arising out of or relating to
this Contract,  including, without limitation, any claim for termination,  shall
not,  under any  circumstances,  exceed the amount of the Contract Price paid by
Customer as of the date of such claim.



                                   ARTICLE 16
                                   INSURANCE

16.1 Third Party Liability  Insurance  Contractor  shall procure and maintain in
effect  insurance for third party liability to provide for the payment of claims
resulting  from  property  loss or  damage or bodily  injury,  including  death,
sustained by Third Parties caused by an occurrence resulting from Insured Launch
Activities. The insurance shall have a limit of U.S. $164,000,000 per occurrence
and in the  aggregate,  or such other  amount as may be  required  by the United
States  Department of  Transportion,  whichever is higher.  Coverage for damage,
loss or injury  sustained by Third  Parties  arising in any manner in connection
with Insured  Launch  Activities  shall attach upon arrival of the  Satellite at
CCAS and will  terminate upon the earlier to occur at the return of all parts of
the Launch Vehicle to Earth or twelve (12) months  following the date of Launch,
unless the Satellite is removed from the Satellite processing area or CCAS other
than by Launch,  in which case,  coverage  shall extend only until such removal.
Such  insurance  shall not cover loss of or damage to the Satellite even if such
claim is brought by any Third Party or Related  Third  Parties.  Such  insurance
also shall not pay claims made by the United  States  Government  for loss of or
damage to United States Government  property in the care, custody and control of
Customer or Contractor.

16.2  Insurance  Required  by  Launch  License  Contractor  shall  provide  such
insurance  as is  required  by the launch  license  issued by the United  States
Department of  Transportation  for loss of or damage to United States Government
property.

16.3 Miscellaneous  Requirements The third party liability  insurance shall name
as  named  insured  Contractor  and  as  additional  insured  Customer  and  the
respective  Related Third Parties of the Parties  identified by each Party,  the
United States  Government and any of its agencies.  Such insurance shall provide
that the  insurers  shall  waive  all  rights of  subrogation  that may arise by
contract  or at law aginst  the named  insured or any  additional  insured.  The
Contractor  shall notify the Customer  when a claim,  arising out of  activities
carried  out as a result  of this  Contract,  has been  filed  against  a policy
maintained by the Contractor in accordance with this Article 16.


                                       21

                                            
<PAGE>

(CONFIDENTIAL  TREATMENT HAS BEEN REQUESTED FOR PAGES 101 TO 109 AND PORTIONS OF
                          PAGE 114 OF THIS EXHIBIT 1B)

          ----------------------------------------------------------



                          ORION SATELLITE CORPORATION



                                   PART 1(B)





                           ORION 2 PAYMENT PLANS AND
                         TERMINATION LIABILITY AMOUNTS


          ----------------------------------------------------------





Signed:                       Date:
On behalf of ORION Satellite Corporation



Signed:                       Date:
On behalf of Matra Marconi Space UK Limited






Part 1(B)
<PAGE>
                                    CONTENTS
                                    --------

Section                        Description                             Page No.
- -------                        -----------                             --------

   1                           Progress Payment                            2
   2                           Milestone Payment Plan                      4
   3                           Termination Liability Amounts               7

<PAGE>
                            COMMERCIAL-IN-CONFIDENCE








                                   SECTION 1
                             PROGRESS PAYMENT PLAN
















page 1                             Issue 1                             323347 vl
<PAGE>
                             Progress Payment Plan

                                 Launch Vehicle

                       
                               Orion 2 Atlas IIAS

                              [                  ]

<PAGE>
                                   SECTION 2

                             MILESTONE PAYMENT PLANS



CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PAGES 105 TO 109 OF THIS DOCUMENT.

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



                          CONTRACT FOR LAUNCH SERVICES



      This  Contract is made and entered  into by and  between  Lockheed  Martin
Commercial Launch Services,  Inc., a Delaware corporation,  having its principal
place  of  business  at  101  West  Broadway,   San  Diego,   California   92101
("Contractor")  and Matra  Marconi  Space UK Limited,  a company  organized  and
existing under the laws of England and Wales with its  registered  office at the
Grove, Warren Lane, Stanmore, Middlesex, HA7 4LY, England ("Customer").



                                   ARTICLE 1
                                  DEFINITIONS


Capitalized terms used and not otherwise defined herein shall have the following
meanings:

      Affiliate means the directors,  officers, agents and employees of a Party.
This definition is for identification purposes only and shall not be interpreted
as  creating  any privity of contract  between  Affiliates  of one Party and the
other Party or its Affiliates.

      CSLA means the  Commercial  Space Launch Act, 49 U.S.C.  Sections  70101 -
70119, as amended.

      Contract means this instrument and all exhibits  attached  hereto,  as the
same may be  amended  from time to time in  accordance  with the  terms  hereof,
including:

                    Exhibit A - Statement of Work
                    Exhibit B - Interface Control Document

      Contract  Price means the Launch  Service  Price as set forth in Article 4
entitled "Contract Price."

      Effective  Date shall have the  meaning  set forth in Article 32  entitled
"Effective Date."

      Excusable Delay shall have the meaning set forth in Paragraph 8.1 entitled
"Excusable Delays Defined."

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information


         Insured Launch  Activities  means the activities  carried out by either
Party or the  Related  Third  Parties of either  Party or by the  United  States
Government and operations  necessary  therefor or incidental thereto pursuant to
the terms of this Contract and, in the case of Launch  Services  licensed by the
CSLA, the launch license issued by the Office of Commercial Space Transportation
(or any successor  agency  thereto) to Contractor  under the CSLA to conduct the
Launch Services,  including the use of United States Goverment launch facilities
at the launch site used by Contractor and the Launch from the launch site.

         Intentional  Ignition means,  with respect to the Launch  Vehicle,  the
point in time during the launch  countdown when initiation of the gas generators
igniters firing command and firing of any of the gas generators igniters occurs.

         Interface  Control  Document or ICD means that document  referred to in
the Statement of Work attached or to be attached as Exhibit B to this Contract.

         Launch means Intentional Ignition followed by either (i) release of the
Launch  Vehicle from the launcher hold down  restraints  for the purpose of lift
off; or (ii) total loss or destruction of the Satellite or Launch Vehicle.

         Launch Date means the calendar date within the Launch Slot during which
the Launch is scheduled to occur,  as established  in accordance  with Article 6
entitled "Launch Schedule" and as such Launch Date may be adjusted in accordance
with Article 7 entitled "Launch Schedule Adjustments."

         Launch   Opportunity   means  an  adequate  time  period  during  which
Contractor,  in its  reasonable  judgment,  may  provide  a  Launch  Service  to
Customer, taking into account all relevant conditions, including but not limited
to, committments to other customers,  maintenance of appropriate clearance times
between  flights,  hardware  availability  and requirements of the United States
Government for range support.

         Launch  Service  means those  services to be provided by  Contractor to
Customer for a single  Launch as set forth in Exhibit A entitled  "Statement  of
Work."

         Launch Slot means a thirty (30) day period  during  which the Launch is
scheduled to occur, as set forth in Article 6 entitled "Launch  Schedule" and as
such Launch Slot may be adjusted in accordance  with Article 7 entitled  "Launch
Schedule Adjustments".


                                       2

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information



         Launch Vehicle means the baseline  launch vehicle system  consisting of
an Atlas lower stage and Centaur upper stage connected by an interstage adapter,
the payload fairing and the payload adapter with separation system, collectively
identified as the Atlas ILAS  Standard with a performance  level as specified in
the Exhibit A Statement of Work.

         NPD means the date upon which all the  conditions  set forth in Article
32 have been met.

         Orion  means  Customer's  customer,   International  Private  Satellite
Partners, L.P.

         Party or Parties means Contractor, Customer or both.

         Related Third Parties means (i) the Parties'  Affiliates and customers;
(ii) the Parties' contractors, subcontractors and suppliers at any tier involved
directly or indirectly in the performance of this Contract, and their directors,
officers agents and employees;  (iii) entities involved with payload  processing
or  other  activities  in  the  payload  processing  facilities,  including  the
contractor providing the payload processing  facilities,  other customers of the
payload processing facilities  contractor,  and all employees and contractors of
those  contractors  and customers;  and (iv) parties having any right,  title or
interest,  whether  through  sale,  lease or service  arrangement  or otherwise,
directly or indirectly, in the Satellite or any transponder,  the Launch Vehicle
or the Launch Service.  This definition is for identification  purposes only and
shall not be interpreted as creating any privity of contract between  Affiliates
of one Party and the other Party or its Affiliates.

         Satellite  means  Customer-provided  Orion F2 satellite and  associated
property to be launched on the Launch Vehicle.

         Statement of Work or SOW means that  document  attached as Exhibit A to
this Contract.

         Termination  Charge  means the charge  calculated  in  accordance  with
Paragraph 21.6 entitled "Termination Charge."

         Third Party means any person or entity other than Contractor, Customer,
their Affiliates and Related Third Parties and the United States  Government and
its agencies, contractors or subcontractors involved in the Launch Services.


                                       3

<PAGE>
    Lockheed Martin Commercial Launch Services, Inc. Proprietary Information


                                   Table 21.6
                         Termination Liability Schedule



Date of Termination                                    Termination Charge
- --------------------------------------------------------------------------------

Effective Date of Contract through 30 September       [---------------------]
1996                                                  


1 October 1996 through 31 December 1996 or up to 
NPD, whichever is earlier                                                      *


NPD through last day of NPD+18 months


First day of NPD+19 months, up to Launch


                                                      [---------------------]

Customer shall pay to Contractor any unpaid  portion of the  Termination  Charge
within  thirty (30) days of  Contractor's  invoice.  Contractor  shall refund to
Customer  any  amount  paid,  without  interest,  under  this  Contract  for the
terminated Launch Service in excess of the Termination Charge within thirty (30)
days of the effective termination date for such Launch Service.



21.7 Effect of Termination If either Party  terminates  this Contract under this
Article 21, both Parties'  obligations  under this Contract with respect to such
Launch Service shall be discharged as of the Contract effective termination date
except that  Customer's  obligation to pay the Termination  Charge  described in
Paragraph 21.6 shall survive the termination of this Contract.

21.8 Effect on Termination  Liability in Event of Launch Schedule  Adjustment 
In the event the  Contractor  postpones the launch  schedule in accordance  with
Article 7 or Article 8, the  Customer's  termination  liability  as set forth in
Table 21.6 above,  shall not  increase  for a period of time equal to the actual
length of the delay.




                                       24
<PAGE>
 
CONFIDENTIAL  TREATMENT HAS BEEN  REQUESTED FOR PAGES 101 TO 109 AND PORTIONS OF
                          PAGE 114 OF THIS EXHIBIT 1B)







                       
28 June 1996                                                             Issue 3





                           ORION SATELLITE CORPORATION


                                    PART 2(A)

                            ORION 2 STATEMENT OF WORK


                                    Issue: 3
                               Dated: 28 June 1996










   Signed:    Date:
   On behalf of ORION Satellite Corporation




   Signed:    Date:
   On behalf of Matra Marconi Space UK Limited



Part 2(A) ORION 2 Statement of Work                                   Page     i

<PAGE>
 


                                                            TABLE OF CONTENTS

1.   INTRODUCTION..............................................................1

     1.1   Scope  .............................................................1
     1.2   Responsibilities....................................................1

2. EQUIPMENT, DOCUMENTATION, AND SERVICES......................................2

     2.1   Introduction  2
     2.2   Deliverable Equipment...............................................3
           2.2.1  Flight Spacecraft............................................3
           2.2.2  Mission Specific Hardware and Software.......................3
           2.2.3  Optional Networking Transponders.............................3
           2.2.4  Optional Spacecraft Dynamic Simulator........................3
     2.3   Deliverable Documentation...........................................4
     2.4   Services   .........................................................4
           2.4.1  Launch Support Services......................................4
           2.4.2  Launch Services..............................................5
           2.4.3  Reserved.....................................................5
           2.4.4  Mission Support Services.....................................5
           2.4.5  Operations Training..........................................5

3.   PROGRAM MANAGEMENT........................................................6

     3.1   Introduction........................................................6
           3.1.1  Scope........................................................6
           3.1.2  Responsibilities.............................................6
           3.1.3  Program Management Plan......................................7
     3.2   Program Management Interface........................................8
     3.3   Documentation and Data Management...................................8
           3.3.1  General......................................................8
           3.3.2  Documentation Center.........................................9
           3.3.3  Data Management Plan.........................................9
           3.3.4  Documentation Submission Criteria............................9
           3.3.5  Revision and Maintenance of Documentation....................9
           3.3.6  Monthly Documentation Status Report..........................9
     3.4   Meetings   .........................................................9
           3.4.1  Inaugural Meeting............................................9
           3.4.2  Progress Meetings...........................................10
           3.4.3  Senior Management Meetings..................................10
           3.4.4  Quarterly Progress Meetings.................................10
           3.4.5  Subcontractor Progress Meetings and Other Meetings..........10


Part 2(A) ORION 2 Statement of Work                                   Page    ii

<PAGE>
28 June 1996                                                             Issue 3

           3.4.6  Agenda Co-ordination Procedure..............................11
           3.4.7  Minutes.....................................................11
     3.5   Reviews    ........................................................11
     3.6   Action Item Control................................................12
     3.7   Management of Contract Changes.....................................12
     3.8   Program Planning and Status Information............................12
           3.8.1  Hardware Matrix ............................................12
           3.8.2  Qualification Status List...................................13
           3.8.3  Critical Items List.........................................13
           3.8.4  Program Schedules ..........................................13
           3.8.5  Program Progress Report.....................................14
           3.8.6  Executive Summary...........................................15
     3.9   Program Monitoring and Notification Requirements...................15
           3.9.1  ORION Representatives.......................................15
           3.9.2  Office Accommodation and Facilities.........................16
           3.9.3  Attendance at Meetings......................................16
           3.9.4  Access to Documentation.....................................16
           3.9.5  ORION Presence During Development, Qualification, and
                  Acceptance Tests............................................16
           3.9.6  Notification Requirements...................................17
           3.9.7  Material Review Board (MRB) and Failure Review
                  Board (FRB).................................................17

4.   DESIGN ACTIVITIES........................................................18

     4.1   General   .........................................................18
     4.2   Design Reviews.....................................................18
     4.3   Design Analyses and Study Reports..................................18
           4.3.1      Analyses at Spacecraft System Level.....................19
           4.3.1.1    Spacecraft Failure Analysis.............................19
           4.3.1.2    Dynamic Analysis........................................19
           4.3.1.3    Antenna Pointing Error Analysis.........................20
           4.3.1.4    Propellant Budget Analysis..............................21
           4.3.1.5    Mass Properties Analysis................................21
           4.3.1.6    Power Budget Analysis...................................21
           4.3.1.7    Mission Analysis........................................22
           4.3.1.8    Electromagnetic Compatibility (EMC) Analysis............22
           4.3.1.9    Environmental Effects Analysis..........................23
           4.3.1.10   Worst Case Performance Analysis.........................24
           4.3.1.11   Autonomous Commands Analysis............................24
           4.3.2      Subsystem Level Analyses................................24
           4.3.2.1    Communications Subsystem Analysis.......................25
           4.3.2.2    Telemetry, Tracking, and Command (TT&C) Subsystem
                      Analysis................................................28

Part 2(A) ORION 2 Statement of Work                                   Page   iii
<PAGE>
28 June 1996                                                             Issue 3

           4.3.2.3    Attitude and Orbit Control Subsystem (AOCS) Analysis....29
           4.3.2.4    Propulsion Subsystem Analysis...........................30
           4.3.2.5    Power Subsystem Analysis................................30
           4.3.2.6    Thermal Subsystem Analysis..............................31
           4.3.2.7    Structure Analysis......................................32

5.  PRODUCT ASSURANCE.........................................................33

     5.1   Product Assurance Requirements.....................................33
     5.2   Quality Assurance Tasks............................................33
6.   MANUFACTURING, ASSEMBLY, INTEGRATION AND TEST............................35

     6.1   General    ........................................................35
     6.2   Test Plan  ........................................................35
     6.3   Test Procedures, Data, and Reports.................................36
           6.3.1  Unit and Subsystem Test Procedures and Reports..............36
           6.3.2  Spacecraft Test Procedures and Reports......................37
           6.3.3  Test Data...................................................37
           6.3.4  Spacecraft Log Book.........................................38
     6.4   Test Reviews.......................................................38
     6.5   Preshipment Review.................................................39
     6.6   System and Major Subsystems Integration and Test Notification......39
     6.7   Failure  Notification..............................................39
     6.8   Electrical and Mechanical Ground Support Equipment
           (EGSE/MGSE)........................................................40
     6.9   Test Equipment Requirements........................................40
     6.10  Software Requirements..............................................40
     6.11  Delivery of Drawings and Engineering Control Documents
           for Spacecraft Operation and In-Orbit Control......................40
     6.12  Secure Command System and Certification............................41

7.   LAUNCH AND MISSION SUPPORT SERVICES......................................42

     7.1   Scope  ............................................................42
     7.2   Launch Vehicle Compatibility.......................................42
     7.3   Launch Support Services............................................42
           7.3.1  Spacecraft Preparation at the Launch Sites..................43
           7.3.2  Spacecraft Propellant and Pressurant........................43
           7.3.3  Support of Meetings and Reviews.............................43
     7.4   Safety ............................................................43
     7.5   Launch Services....................................................44

Part 2(A) ORION 2 Statement of Work                                   Page    iv
<PAGE>
28 June 1996                                                             Issue 3

     7.6   Mission Support....................................................44
           7.6.1  Scope ......................................................44
           7.6.2  Mission Support Activities..................................45
           7.6.2.1    Preparation and Definition of Mission Support Documents.45
           7.6.2.2    World-Wide Ground Segment...............................48
           7.6.2.3    Mission Support Procedures and Sequence of Events.......49
           7.6.2.4    Spacecraft/ORION SCS Compatibility......................49
           7.6.2.5    In-Orbit Test Plan and Procedure........................50
           7.6.2.6    Mission Reviews.........................................50
           7.6.2.7    Training ...............................................51
           7.6.2.7.1  Classroom Training......................................51
           7.6.2.7.2  On the Job Training.....................................52
           7.6.2.7.3  Course Materials........................................53
           7.6.2.8    Real-Time Mission Operations............................53
           7.6.2.9    Post-Mission Review.....................................53
           7.6.2.10   In-Orbit Testing and Test Report........................54
           7.6.2.11   Spacecraft Acceptance Review............................54
           7.6.2.12   Spacecraft Operational Support..........................54

8.   SHIPPING AND  TRANSPORTATION.............................................55

     8.1   Shipping  and Transportation  Plan.................................55
     8.2   Spacecraft Shipment ...............................................55

9.   OPTIONS
     9.1   Networking Transponders............................................56
     9.2   Spacecraft Dynamic Simulator Software..............................56

10.  MISSION SPECIFIC HARDWARE AND SOFTWARE ..................................57

     10.1  Command Generators.................................................57
     10.2  Propulsion Model...................................................57
     10.3  Propellant Gauging.................................................57
     10.4  Sensor Blinding Prediction Model...................................57


Part 2(A) ORION 2 Statement of Work                                   Page     v

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PAGES 130 TO 187 OF THIS DOCUMENT.

<PAGE>

28 June 1996                 CONFIDENTIAL                                Issue 2



                           ORION SATELLITE CORPORATION


                                    PART 2(B)

                                ORION 2 CONTRACT
                           DOCUMENTATION REQUIREMENTS
                                   LIST (CDRL)



                                    Issue: 2
                               Dated: 28 June 1996







   Signed:                            Date:
   On behalf of ORION Satellite Corporation




   Signed:                            Date:
   On behalf of Matra Marconi Space UK Limited



Part 2(B) ORION 2 Contractual Documentation Requirements List           Page  i

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PAGES 189 TO 206 OF THIS DOCUMENT.

<PAGE>

   
 28 June 1996                   CONFIDENTIAL                          Issue 3

                                               


                           ORION SATELLITE CORPORATION


                                    PART 3(A)

                        ORION 2 SPACECRAFT SPECIFICATIONS



                                     Issue:3
                               Dated: 28 June 1996









Signed:                             Date:
On Behalf of ORION Satellite Corporation




Signed:                             Date:
On Behalf of Matra Marconi Space UK Limited

Part 3(A) ORION 2 Spacecraft Specifications                            Page    i




<PAGE>

                                            TABLE OF CONTENTS

1. INTRODUCTION................................................................1
      1.1 Scope and Purpose....................................................1
      1.2 Description of the ORION 2 Spacecraft................................1
      1.3 General Requirements.................................................1
2. SPACECRAFT SYSTEM CHARACTERISTICS...........................................3
      2.1 Life ................................................................3
               2.1.1 Manoeuver Life............................................3
               2.1.2 Orbital Life..............................................3
      2.2 Launch Configuration.................................................3
      2.3  Spacecraft Reliability and Quality Assurance
               Requirements....................................................3
      2.5 General Spacecraft Design Considerations.............................6
               2.5.1 Configuration.............................................6
               2.5.2 Maintainability, Interchangeability, and
                       Accessibility...........................................6
               2.5.3 Mechanical Design Criteria for Units and
                       Assemblies..............................................7
               2.5.4 Thermal Design Criteria for Units and
                       Assemblies..............................................7
               2.5.5 Design Criteria for Electronic Units and Onboard
                        Software...............................................7
               2.5.6 Use of  Connectors........................................8
               2.5.7 Spacecraft Testing Via the Telemetry System...............8
               2.5.8 Hard-line Connections for Communications and TT&C 
                       Subsystem Testing.......................................8
               2.5.9 Insulation of Conductors..................................8
               2.5.10 Radiation Environment....................................9
               2.5.11 Design Considerations Associated with 
                      Charging Phenomena.......................................9
               2.5.12 Zero-g Testing..........................................11
               2.5.13 Operation Following Storage.............................11
               2.5.14 Launch Windows and Mission Profile
                       Constraints............................................11
               2.5.15 Telemetry Transmitters Status During Launch.............12
               2.5.16 Helium Pressurant Venting (if applicable)...............12
               2.5.17 Orbit Control Maneuvers.................................12
               2.5.18 Operation in Inclined Orbit.............................12
               2.5.19 Attitude Control Failure Mode Recovery and 
                       Continued Operation....................................12
      2.6 Definition of Coordinate Axes and Attitude Angles...................13
      2.7 Antenna Beam Pointing Accuracy......................................13
      2.8 Minimum Performance and Defect Criteria.............................15
<PAGE>

3.0 COMMUNICATIONS SUBSYSTEM..................................................16
      3.1 General.............................................................16
               3.1.1    Definitions...........................................16
               3.1.2    Conditions for Specification..........................19
               3.1.3    Primary Transmission Modes............................20
      3.2 Coverage............................................................20
               3.2.1    Coverage Regions......................................20
               3.2.2    Beams.................................................22
      3.3 Polarization........................................................27
               3.3.1    Orthogonality.........................................27
               3.3.2    Receive Beam Isolation................................28
               3.3.3    Transmit Beam Isolation...............................28
      3.4 Capacity............................................................30
      3.5 Frequency Plan......................................................31
      3.6 Communications Subsystem and Antenna Beam
               Interconnectivity..............................................33
               3.6.1    Communications Subsystem Configuration................33
               3.6.2    Antenna Beam Interconnectivity........................33
      3.7 Input Characteristics...............................................34
               3.7.1    Receive Sensitivity (G/T).............................34
               3.7.2    Gain and Level Control................................37
               3.7.2.1  Fixed Gain Mode.......................................37
               3.7.2.2  Automatic Level Control Mode..........................37
               3.7.3    Transponder Gain......................................38
               3.7.3.1  FG Mode...............................................38
               3.7.3.2  ALC Mode..............................................38
               3.7.4    Drive Conditions......................................38
               3.7.4.1  Overdrive Capability..................................38
               3.7.4.2  Overdrive Damage Limit................................39
               3.7.4.3  Pulsed Transient Response.............................39
               3.7.5    Receive Rejection.....................................39
               3.7.6    Linearity of the Common Receive Section...............40
               3.7.7    Interference from Command Carrier.....................40
      3.8 Output Characteristics..............................................41
               3.8.1    Effective Isotropic Radiated Power (EIRP).............41
               3.8.2    Spurious Outputs......................................45
               3.8.3    Spurious Modulation...................................46
               3.8.4    AM/AM Transfer........................................46
               3.8.5    AM/FM Transfer........................................48
               3.8.5.1  Continuous Mode.......................................48
               3.8.5.2  Pulsed Level..........................................48
               3.8.6    Passive Intermodulation...............................48
               3.8.7    Multipaction Requirements.............................48
      3.9 Transfer Characteristics............................................48
               3.9.1    Gain Versus Frequency.................................49
<PAGE>


               3.9.2     Gain Slope...........................................51
               3.9.3     Group Delay Versus Frequency.........................51
               3.9.4     Group Delay Slope....................................53
               3.9.5     Group Delay Stability................................53
               3.9.6     Group Delay Ripple...................................53
               3.9.7     Phase Linearity and AM/PM Conversion
                          Coefficient.........................................53
               3.9.8     AM/PM TransferCoefficient............................54
               3.9.9     Amplitude Linearity..................................54
               3.9.10    Frequency Stability..................................55
               3.9.11    Out-Of-Band Response.................................55
      3.10 Cessation of Emissions.............................................56
      3.11 Traffic Routing....................................................56
      3.12 Redundancy.........................................................57
      3.13 Power Amplifiers...................................................57
               3.13.1    Linearized TWTAs.....................................57
               3.13.2    TWTA Auto-Restart Capability.........................57
      3.14 TT&C Interface.....................................................58
               3.14.1    Command Requirements.................................58
               3.14.2    Telemetry Requirements...............................58
      4.0 TELEMETRY, TRACKING, AND COMMAND (TT&C).............................64
      4.1 Telemetry...........................................................64
               4.1.1     Functional Requirements..............................64
               4.1.1.1   Purpose..............................................64
               4.1.1.2   Function.............................................65
               4.1.1.3   Operation............................................65
               4.1.1.4   Interaction with the Communications
                         Subsystem............................................65
               4.1.1.5   Redundancy...........................................65
               4.1.1.6   Interfaces...........................................66
               4.1.1.6.1 All Subsystems.......................................66
               4.1.1.6.2 Communications Subsystem.............................67
               4.1.1.6.3 Telemetry, Tracking and Command Subsystem............67
               4.1.1.6.4 Attitude and Orbit Control Subsystem.................68
               4.1.1.6.5 Propulsion Subsystem.................................69
               4.1.1.6.6 Power Subsystem......................................69
               4.1.1.6.7 Thermal Subsystem....................................70
               4.1.1.6.8 Deployment and Pointing Mechanisms...................70
               4.1.1.7   Accuracy.............................................71
               4.1.1.8   Data Channel Dynamic Range...........................71
               4.1.1.9   Spare Capacity.......................................72
               4.1.2     RF Parameters........................................72
      4.2 Command.............................................................73
<PAGE>


               4.2.1     Functional Requirements..............................73
               4.2.1.1   Purpose..............................................73
               4.2.1.2   Function.............................................73
               4.2.1.3   Operation............................................73
               4.2.1.4   Isolation............................................73
               4.2.1.5   Redundancy...........................................74
               4.2.1.6   Interfaces...........................................74
               4.2.1.7   System Test Considerations...........................74
               4.2.1.8   Spare Capacity.......................................75
               4.2.2     RF Parameters........................................75
               4.2.3     Baseband Characteristics.............................75
               4.2.3.1   Error Prevention and  Detection......................76
               4.2.3.2   Command Security.....................................76
               4.2.3.3   Command Acceptance Probability.......................77
      4.3 Ranging.............................................................77
               4.3.1     Functional Requirement...............................77
               4.3.1.1   Purpose..............................................77
               4.3.1.2   Function.............................................77
               4.3.1.3   Operation............................................78
               4.3.1.4   Isolation............................................78
               4.3.2     Performance Requirements.............................78
5. ATTITUDE AND ORBIT CONTROL SUBSYSTEM(AOCS).................................79
      5.1 Functional Description..............................................79
      5.2 Subsystem Performance and Design Requirements.......................79
               5.2.1     Attitude Determination...............................79
               5.2.1.1   Transfer Orbit.......................................79
               5.2.1.2   Synchronous Orbit....................................80
               5.2.2     Attitude Control.....................................80
               5.2.2.1   Parking Orbit (If Applicable)........................80
               5.2.2.2   Transfer Orbit.......................................80
               5.2.2.3   Transfer to Geosynchronous Orbit and Initial
                          Acquisition.........................................80
               5.2.2.4   On Orbit Control and Antenna Pointing Mode...........80
               5.2.3     Reacquisition........................................81
               5.2.4     Ground Control.......................................81
               5.2.4.1   Ground Control Command Capability....................81
               5.2.5     Safe Modes...........................................81
               5.2.6     Special Features.....................................82
               5.2.6.1   Antenna Pattern Measurement Capability...............82
               5.2.6.2   Control Bias Capability..............................82
               5.2.6.3   AOCS Switching.......................................82
               5.2.6.4   Control Electronics Fault Protection.................82
               5.2.6.5   Dynamic Stability....................................83
               5.2.7     Subsystem Configuration and Interfaces...............83
               5.2.7.1   Redundancy...........................................83
<PAGE>


               5.2.7.2   TT&C Interfaces......................................83
               5.2.7.3   Propulsion Interfaces................................83
6. PROPULSION SUBSYSTEM.......................................................84
      6.1 Functional Description..............................................84
      6.2 Design Requirements.................................................84
      6.3 Redundancy..........................................................86
      6.4 Maneuver Life and Propellant Loading................................87
               6.4.1    General Requirements..................................87
               6.4.2    Propellant Budgeting Methodology......................87
               6.4.2.1  Actual Hardware Performance Test Data.................87
               6.4.2.2  Inefficiencies of Operation...........................88
               6.4.2.3  Inflight Performance..................................88
               6.4.2.4  Specific Maneuver Requirements........................88
      6.5 TT&C Interfaces.....................................................89
7. POWER SUBSYSTEM............................................................90
      7.1 Functional Description..............................................90
      7.2 General Requirements................................................90
      7.3 Energy Generation...................................................91
               7.3.1    Solar Cells...........................................91
               7.3.2    Power Output..........................................91
               7.3.3    Power Transfer Assembly...............................91
      7.4 Energy Storage......................................................92
               7.4.1    Batteries.............................................92
               7.4.2    Battery Charge Management.............................92
               7.4.3    Cell Failure..........................................93
               7.4.4    Battery Removal and Storage...........................93
      7.5 Power Conditioning and Control......................................93
               7.5.1    Bus Configuration.....................................93
               7.5.2    Failure Modes and Shutdown Sequence...................94
               7.5.3    Bus Undervoltage and Overvoltage......................95
               7.5.4    Interaction Between the Communications and
                         Power Subsystems.....................................95
      7.6 TT&C Interfaces.....................................................95
8. THERMAL CONTROL SUBSYSTEM..................................................96
      8.1 Functional Description..............................................96
      8.2 Performance Requirements............................................96
      8.3 Subsystem Design Requirements.......................................97
               8.3.1    Instrumentation.......................................98
               8.3.2    Materials.............................................98
<PAGE>


               8.3.3    Venting...............................................98
               8.3.4    Grounding.............................................99
               8.3.5    Multi-Layer Insulating Blanket (MLI)..................99
               8.3.6    Contamination Control.................................99
      8.4 TT&C Interfaces....................................................100
9. STRUCTURE SUBSYSTEM.......................................................101
      9.1 Functional Description.............................................101
      9.2 Performance Requirements...........................................101
      9.3 Design Requirements................................................101
10 MECHANISMS................................................................103
      10.1 Design Requirements...............................................103
      10.2 TT&C Interfaces...................................................104
11. PYROTECHNIC AND ELECTROEXPLOSIVE DEVICES.................................105

Attachment:
Annex A  Radiation Environment Specification, Issue C, 13 October 1995



<PAGE>
13 October 1995                                                          Issue C

                                  CONFIDENTIAL

                                   PART 3(A)
                                    ANNEX A


                             RADIATION ENVIRONMENT
                                 SPECIFICATION




                     'REDLINED' AND AMENDED 10 OCTOBER 1995
                     'REDLINED' AND AMENDED 13 OCTOBER 1995
                     --------------------------------------







Part 3(A) Annex A Radiation Environment Specification                   Page   i
<PAGE>




                                TABLE OF CONTENTS

1.   INTRODUCTION..............................................................1

2.   SYNCHRONOUS ORBIT CONDITIONS..............................................1
         2.1  Electrons........................................................1
         2.2  Protons..........................................................2
         2.3  Alpha Particles..................................................2
         2.4  Cosmic Ray Radiation.............................................3
         2.5  Ultraviolet Radiation............................................4
         2.6  Plasma...........................................................4
         2.7  Micrometeroids...................................................5

3.   TRANSFER ORBIT CONDITIONS.................................................5
         3.1  Transfer Orbit Electron Flux Values..............................5
         3.2  Transfer Orbit Proton Flux Values................................5



Part 3(A) Annex A Radiation Environment Specification                   Page  ii

CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PAGES 212 TO 314 OF THIS DOCUMENT.

<PAGE>

 28 June 1996                   CONFIDENTIAL                          Issue 3



                           ORION SATELLITE CORPORATION


                                    PART 3(B)

                               ORION 2 SPACECRAFT
                         PRODUCT ASSURANCE REQUIREMENTS


                                    Issue: 3
                               Dated: 28 June 1996








   Signed:        Date:
   On behalf of ORION Satellite Corporation




   Signed:        Date:
   On behalf of Matra Marconi Space UK Limited 

Part 3(B) ORION 2 Spacecraft Product Assurance Requirements            page    i

<PAGE>

                                TABLE OF CONTENTS

1.   INTRODUCTION..............................................................1

      1.1     Scope............................................................1
      1.2     Product Assurance Objectives.....................................1

2.   PRODUCT ASSURANCE REQUIREMENTS............................................3

      2.1     Product Assurance Plan...........................................3
      2.2     Organization and Management......................................3
      2.3     Reporting........................................................3
      2.4     Non-Conformance..................................................4
      2.5     Contract Change Management.......................................4
               2.5.1   Change Classification...................................4
               2.5.2   Preliminary Change Assessment...........................5
               2.5.3   Change Request (CR).....................................5
               2.5.4   Contract Change Notice (CCN)............................6
               2.5.5   Review and Approval of a Change.........................7
               2.5.6   Change Review Board.....................................7
               2.5.7   Implementation of a Change by the Contractor............8
               2.5.8   Directed Changes........................................8
               2.5.9   Go Ahead Procedure......................................8
               2.5.10  CR/CCN Log..............................................9
               2.5.11  Waivers and Deviations..................................9

3.   REVIEWS AND AUDITS.......................................................11

      3.1     Design Reviews..................................................11
               3.1.1   Review Chairperson and Review Board....................12
               3.1.2   Review Notification....................................12
               3.1.3   Data Packages..........................................12
               3.1.4   Review Procedures......................................12
               3.1.5   Review Summary.........................................13
               3.1.6   Review Completion......................................13
               3.1.7   Subsystem and Unit Design Reviews......................13
               3.1.7.1 Unit and Subsystem Preliminary Design Reviews..........14
               3.1.7.2 Unit and Subsystem Critical Design Reviews.............14
               3.1.7.3 Communications Subsystem Final Design Review...........15
               3.1.7.4 Unit Qualification Design Review.......................15
               3.1.8   Spacecraft System Design Reviews.......................15
               3.1.8.1 System Preliminary Design Review.......................16
               3.1.8.2 System Critical Design Review..........................16
               3.1.8.3 System Final Design Review.............................16
      3.2     Test Reviews....................................................17
<PAGE>

      3.3     Preshipment Review..............................................17
      3.4     Further Reviews and Inspections.................................18
      3.5     Design Review Documentation.....................................19
      3.6     Test Review Documentation.......................................19
      3.7     Program Audits..................................................20
      3.8     ORION Right of Access...........................................20

4.   SUBCONTRACTOR AND SUPPLIER MANAGEMENT....................................21

      4.1     Subcontractor/Supplier Product Assurance Plan...................21
      4.2     Requirements....................................................21
      4.3     Reviews and Controls............................................21

5.   RELIABILITY ASSURANCE....................................................22

      5.1     Reliability Analysis............................................22
      5.2     Parts Derating and Stress Analysis..............................23
      5.3     Failure Modes, Effects, and Criticality Analyses................23
      5.4     Worst-Case Analysis (WCA).......................................24
      5.5     Critical Items Control..........................................25
      5.6     Design Verification Matrix (DVM)................................26
      5.7     Qualification Status List (QSL).................................26

6.   QUALITY ASSURANCE........................................................27

      6.1     Quality Assurance...............................................27
      6.2     Procurement and Fabrication.....................................27
      6.3     Test and Inspection.............................................27
      6.4     Workmanship Standards...........................................28
      6.5     Quality Records and Traceability................................28
      6.6     Non-Conformance Control.........................................28
               6.6.1   Non-Conformance Reporting..............................29
               6.6.2   Non-Conformance/Failure Review and Disposition.........29
               6.6.3   Failure Analysis and Corrective Action.................29

7.   PARTS PROCUREMENT........................................................30

      7.1     Parts Procurement and Control...................................30
      7.2     Organization and Responsibilities...............................30
      7.3     Selection and Application.......................................30
      7.4     Quality Provisions..............................................31
      7.5     Radiation.......................................................32
      7.6     Lot Transfer....................................................32
      7.7     Traceability....................................................32
      7.8     Hybrids, MCMs, Battery Cells, TWTs, and Magnetics...............32
<PAGE>

      7.9     Traveling Wave Tube Amplifiers..................................33
      7.10     Parts Documentation............................................34

8.   MATERIALS AND PROCESSES..................................................35

      8.1     Materials and Process Control...................................35
      8.2     Organization....................................................35
      8.3     Critical Materials and Processes................................35
      8.4     Materials and Process Selection.................................35
      8.5     Materials and Process Documentation.............................36

9.   SOFTWARE QUALITY ASSURANCE...............................................37

      9.1     Software Quality Assurance Plan.................................37
      9.2     Software Development............................................37
      9.3     Configuration Control...........................................37
      9.4     Verification and Acceptance Testing.............................37
      9.5     Non-Conformance Control.........................................38

10.  CONFIGURATION MANAGEMENT.................................................39

      10.1     Configuration Management.......................................39
      10.2     Configuration Identification and Control.......................39
      10.3     Change Control.................................................40
      10.4     Configuration Verification.....................................40
      10.5     Configuration Status Accounting and Documentation..............40

11.  SAFETY...................................................................41

      11.1     General........................................................41
      11.2     Hazardous Conditions...........................................41
      11.3     Safety and Hazard Analyses.....................................41

12. Launch Vehicle............................................................42

         12.1  Introduction...................................................42
         12.2  Reporting......................................................42
         12.3  Reviews........................................................42
                  12.3.1  Interface Control Document Review (ICDR)............42
<PAGE>

                  12.3.2  Mission Peculiar Design Review (MPDR)...............42
                  12.3.3  Launch Vehicle System Review (LVSR).................42
                  12.3.4  Certificate of Completion Review (COCR).............43
                  12.3.5  Review Summary and Action Items.....................43
         12.4  Launch Readiness Review........................................43




APPENDIX 1  REVIEW ITEM DISCREPANCY FORM......................................44
APPENDIX 2  CHANGE REQUEST FORM...............................................45
APPENDIX 3  CONTRACT CHANGE NOTICE FORM.......................................46
APPENDIX 4  REQUEST FOR DEVIATION/WAIVER FORM.................................47
APPENDIX 5  NON-CONFORMANCE REPORT FORM.......................................48

<PAGE>

 28 June 1996                   CONFIDENTIAL                          Issue 3



                           ORION SATELLITE CORPORATION


                                    PART 3(C)

                          ORION 2 SPACECRAFT ON-GROUND
                                TEST REQUIREMENTS


                                    Issue: 3
                               Dated: 28 June 1996










Signed:                   Date:
On behalf of ORION Satellite Corporation




Signed:                   Date:
On Behalf of Matra Marconi Space UK Limited


Part 3(c) ORION 2 Spacecraft On-Ground Test Requirement                Page    i

<PAGE>



                               TABLE OF CONTENTS


1.   INTRODUCTION..............................................................1

2.   GENERAL COMMENTS..........................................................2

    2.1 TEST PHILOSOPHY........................................................2
    2.2 DEFINITIONS............................................................3
    2.3 TEST REQUIREMENTS......................................................4
      2.3.1 GENERAL............................................................5
      2.3.2 TEST EQUIPMENT AND TEST FACILITY REQUIREMENTS......................6
      2.3.3 ZERO-G TESTING.....................................................6
      2.3.4 ACCEPTANCE TESTS...................................................7
      2.3.5 PROTOFLIGHT TESTS..................................................7
      2.3.6 QUALIFICATION TESTS................................................
    2.4 WITNESSING OF TESTS....................................................8
    2.5 TEST DATA..............................................................9
    2.6 TEST REVIEWS...........................................................9
    2.7 DOCUMENTATION..........................................................9
    2.8 ORGANIZATION...........................................................9

3.   UNIT, SUBSYSTEM AND SPACECRAFT TEST PROGRAM .............................10

    3.1 EQUIPMENT CATEGORIZATION...............................................
    3.2 TEST PROGRAM OVERVIEW.................................................10

4.   PROTOFLIGHT TESTS........................................................25

   4.1 UNIT PROTOFLIGHT TESTS.................................................25
   4.2 SUBSYSTEM PROTOFLIGHT TESTS............................................31
      4.2.1 REPEATER SUBSYSTEM................................................31
      4.2.2 ANTENNA SUBSYSTEM.................................................32
      4.2.3 TELEMETRY, TRACKING, AND COMMAND (TT&C) SUBSYSTEM.................35
      4.2.4 AOCS SUBSYSTEM PROTOFLIGHT DYNAMIC TEST...........................35
      4.2.5 PROPULSION SUBSYSTEM..............................................36
      4.2.6 POWER SUBSYSTEM...................................................36
      4.2.6.1 SOLAR ARRAY.....................................................36
      4.2.6.2 BATTERY ASSEMBLY................................................38
      4.2.7 STRUCTURE SUBSYSTEM PROTOFLIGHT TEST..............................38
                  4.2.8 THERMAL SUBSYSTEM PROTOFLIGHT TEST....................37
<PAGE>

   4.3 SPACECRAFT PROTOFLIGHT TEST............................................38
      4.3.1  INTEGRATION TESTS................................................38
      4.3.2  INTEGRATED SYSTEM TEST...........................................38
      4.3.3  ELECTRO MAGNETIC COMPATIBILITY (EMC) TEST........................40
      4.3.4  RF HEALTH CHECK..................................................40
      4.3.5  ELECTRO STATIC DISCHARGE (ESD) TEST..............................41
      4.3.6  SPACECRAFT ALIGNMENT TEST........................................42
      4.3.7  SINUSOIDAL VIBRATION.............................................42
      4.3.8  POST-SINUSOIDAL VIBRATION FUNCTIONAL TESTS.......................42
      4.3.9  ACOUSTIC VIBRATION TEST..........................................43
      4.3.10 POST-ACOUSTIC VIBRATION FUNCTIONAL TESTS.........................43
      4.3.11 SHOCK AND DEPLOYMENT TESTS.......................................43
      4.3.12 POST-LAUNCH ENVIRONMENT PERFORMANCE TEST.........................44
      4.3.13 THERMAL BALANCE/THERMAL VACUUM TEST..............................44
      4.3.14 FINAL PERFORMANCE TEST...........................................46
      4.3.15 RF RANGE TEST....................................................45
      4.3.16 SPACECRAFT MASS PROPERTIES MEASUREMENTS..........................46

5.   FLIGHT ACCEPTANCE TESTS..................................................54

   5.1 UNIT ACCEPTANCE TESTS..................................................54
         5.1.1 PIM............................................................55
         5.1.2  POWER HANDLING MP AND GP......................................55
   5.2 SUBSYSTEM ACCEPTANCE TESTS.............................................55
      5.2.1 ANTENNA SUBSYSTEM.................................................55
      5.2.2 ATTITUDE AND ORBIT CONTROL SUBSYSTEM (AOCS).......................55
      5.2.3 POWER SUBSYSTEM...................................................55
      5.2.4 STRUCTURE SUBSYSTEM ACCEPTANCE TESTS..............................56
      5.2.5 THERMAL SUBSYSTEM.................................................56
      5.2.6 PLATFORM HARNESS..................................................56
   5.3 SPACECRAFT ACCEPTANCE TEST.............................................56

6.   LIFE TESTS...............................................................58

7.   DEVELOPMENT AND QUALIFICATION TEST.......................................59

   7.1 COMMUNICATIONS SUBSYSTEM TESTS.........................................59
      7.1.1 ANTENNA UNIT AND SUBSYSTEM TEST...................................59
      7.1.2 REPEATER UNITS....................................................60

<PAGE>

   7.2 STRUCTURE SUBSYSTEM TESTS..............................................60
      7.2.1 STRUCTURE STATIC TEST.............................................60
   7.3 AOCS SUBSYSTEM QUALIFICATION TESTS.....................................60
      7.3.1 AOCS SUBSYSTEM DYNAMIC TESTS......................................60
      7.3.2 LIQUID SLOSH TEST.................................................60
   7.4 PROPULSION SUBSYSTEM QUALIFICATION TESTS...............................61
      7.4.1 GENERAL...........................................................61
      7.4.2 THRUSTERS.........................................................61
      7.4.3 LIQUID APOGEE/PERIGEE ENGINES.....................................62
      7.4.4 PROPELLANT TANK...................................................62
      7.4.5 SUBSYSTEM VERIFICATION TEST.......................................62
   7.5 THERMAL SUBSYSTEM......................................................63
      7.5.1 THERMAL SURFACES..................................................63
      7.5.2 HEAT PIPES........................................................63
   7.6 MECHANISMS.............................................................64

8.   INTERFACE COMPATIBILITY TESTS............................................65

   8.1 GROUND CONTROL SYSTEM COMPATIBILITY....................................65
   8.2 LAUNCH VEHICLE COMPATIBILITY...........................................65

9.   LAUNCH PREPARATION TEST..................................................66

   9.1 GENERAL................................................................66
   9.2 LAUNCH SITE FUNCTIONAL TEST............................................66
   9.3 LAUNCH PREPARATION FUNCTIONAL TESTS....................................67
   9.4 POST-ENCAPSULATION AND LAUNCH PAD TESTS................................68

10.      DESIGN VERIFICATION MATRICES (DVM)...................................69

   10.1 DESIGN VERIFICATION...................................................69

11.      TEST CONFIGURATION MATRICES..........................................87

   11.1 INTRODUCTION..........................................................87
<PAGE>

   11.2 REPEATER TEST CONFIGURATIONS..........................................87
                  11.2.1 OVERALL GUIDELINES...................................87
                  11.2.2 SUBSYSTEM LEVEL......................................88
                  11.2.3 SPACECRAFT LEVEL.....................................88
                  11.2.4 RF LINK CALIBRATIONS.................................89
                  11.2.5 PERFORMANCE PARAMETERS...............................89
   11.3 ANTENNA TEST CONFIGURATIONS...........................................90
                  11.3.1 UNIT/SUBSYSTEM LEVEL.................................90
                  11.3.2 SPACECRAFT LEVEL.....................................91

<PAGE>

 28 June 1996                   CONFIDENTIAL                          Issue 3





                           ORION SATELLITE CORPORATION



                                    PART 3(D)

                         ORION 2 IN-ORBIT COMMISSIONING

                                       AND
                          ACCEPTANCE TEST REQUIREMENTS


                                    Issue: 3
                               Dated: 28 June 1996










     Signed:                        Date:
     On behalf of ORION Satellite Corporation



     Signed:                        Date:
     On behalf of Matra Marconi Space UK Limited


Part 3(D) ORION 2 In-Orbit Commissioning and Acceptance Test Requirements
                                                                          Page i
<PAGE>
<PAGE>
28 June 1996                       CONFIDENTIAL                          Issue 3

                                    PART 3(D)

                             IN-ORBIT COMMISSIONING
                                       AND
                          ACCEPTANCE TEST REQUIREMENTS



                                    CONTENTS

                                                                        PAGE NO.

     1.  SCOPE.................................................................1

     2.  DEFINITIONS...........................................................1

     3.  INTRODUCTION..........................................................2

     4.  COMMISSIONING.........................................................4

         4.1    Commissioning Activities.......................................4
         4.2    Documentation..................................................5

     5.  ACCEPTANCE TESTING....................................................6

         5.1    Aggregate Predicted Transponder Life...........................6
         5.2    Transponder Acceptance Tests...................................8
         5.3    Determination of other Spacecraft Parameters..................12
         5.4    Documentation.................................................15

     6.  POST ACCEPTANCE TRANSPONDER TESTING..................................18

     ANNEX A    GROUND TEST FACILITY CONCEPT..................................20

     ANNEX B    COMMISSIONING ACTIVITIES......................................23

     ANNEX C    TRANSPONDER PERFORMANCE TESTS.................................30

<PAGE>









                                     ANNEX A

                          GROUND TEST FACILITY CONCEPT










<PAGE>









                                     ANNEX B

                            COMMISSIONING ACTIVITIES



<PAGE>








                                     ANNEX C

                             TRANSPONDER PERFORMANCE
                                      TESTS








<PAGE>



                PART IV TO ORION 2 SPACECRAFT PURCHASE CONTRACT

<PAGE>
[GRAPHIC OMITTED]           MEMORANDUM


TO:       DISTRIBUTION  
FROM:     G.  Jansson  
SUBJECT:  ORION 2 Contract - Technical Documentation Rev A 
DATE:     23 July 1996 
     cc:  F. Weber,  D. Curtin,  R. Sorbello,  P. Phung,  D. Shay, S. Lewis,  B.
          Randall,  L. Tang, J. Dealy (The Dealy  Strategy  Group),  J. Sullivan
          (Shaw, Pittman, Potts & Trowbridge)

- --------------------------------------------------------------------------------
Please find the attached  sheets which  represent  revisions to the  appropriate
pages of their respective document. The attached is delineated below:
<TABLE>
<CAPTION>
                  Document                                                  Page(s)
                  --------                                                  -------
<S>                                                                   <C>
Part 3(A) ORION 2 Spacecraft Specifications                           ii, iii, iv, v, vi,
                                                                      20, 42

Part 3(B) ORION 2 Spacecraft Product Assurance Requirements           iv, v, 42, 43

Part 3 (D) In-Orbit Commissioning and Acceptance Test Requirements    ii
</TABLE>
The above changes have not affected the revision  status of the pages  mentioned
nor the complete document; each remains at Issue 3.

Please insert the attached  pages into your  existing  documents and discard the
previous pages.
<PAGE>


[GRAPHIC OMITTED]           MEMORANDUM


TO:        DISTRIBUTION  
FROM:      G.  Jansson  
SUBJECT:   ORION 2 Contract - Technical Documentation Rev B 
DATE:      25 July 1996 
     cc:  F. Weber,  D. Curtin,  R. Sorbello,  P. Phung,  D. Shay, S. Lewis,  B.
          Randall,  L. Tang, J. Dealy (The Dealy  Strategy  Group),  J. Sullivan
          (Shaw, Pittman, Potts & Trowbridge)

- --------------------------------------------------------------------------------
Please find the attached  sheet(s) which represent  revisions to the appropriate
page(s) of their respective document. The attached is delineated below:

           Document                                                   Page(s)
           --------                                                   -------

Part 3(B) ORION 2 Spacecraft Product Assurance Requirements            iv

Part 3(A) ORION 2 Spacecraft Specifications                            1


The above change(s) have not affected the revision status of the pages mentioned
nor the complete document; each remains at Issue 3.

Please insert the attached page(s) into your existing  documents and discard the
previous page(s).


The portions of this Exhibit for which confidential treatment has been requested
are marked by brackets ([ ]). In addition,  an asterisk (*) appears in the right
hand margin of each  paragraph in which  confidential  information  is included.


                                OPTION AGREEMENT
                                      FOR
                         PURCHASE OF ORION 2 SPACECRAFT


         This Option  Agreement  ("Agreement") is made this 10th day of December
1996 ("Effective Date") by and between International Private Satellite Partners,
L.P.,  d/b/a Orion  Atlantic,  L.P.,  a Delaware  limited  partnership  with its
principal offices located at 2440 Research Boulevard, Rockville, Maryland 20850,
U.S.A.  ("ORION"),  and Matra Marconi Space UK Limited,  a company organized and
existing under the laws of England and Wales with its  registered  office at The
Grove, Warren Lane, Stanmore, Middlesex, HA7 4LY, England ("MMS").


         WHEREAS, ORION desires to purchase from MMS, and MMS desires to sell to
ORION, an option to purchase a communications  satellite  ("Orion 2 Spacecraft")
designed,  developed,  built  and  delivered  in orbit on an Atlas  IIAS  launch
vehicle with the configuration,  schedule and technical performance requirements
set forth in the ORION 2 Purchase  Contract signed by the Parties and dated July
31, 1996,  as such contract is to be restated and amended with respect to price,
payment  schedule and other  provisions set forth in the Memorandum of Agreement
signed by the Parties on December 10, 1996; and


         NOW,   THEREFORE,   in   consideration   of  the  mutual  promises  and
undertakings contained herein, the Parties, intending to be legally bound, agree
as follows:


1. Grant of Option. MMS hereby grants to ORION the option ("Option") to purchase
from MMS the ORION 2 Spacecraft constructed and delivered in accordance with the
terms and  conditions of the ORION 2 Purchase  Contract,  as amended.  As of the
date ORION  exercises  the Option,  the ORION 2 Purchase  Contract,  as amended,
shall be deemed to be fully  effective and to have been in full force and effect
from the Option Purchase Date.


2. Option  Purchase  Date and Period.  For the purposes of this  Agreement,  the
"Option Purchase Date" shall be the date upon which MMS receives Installment No.
2 as detailed in  paragraph 3 hereof,  but in no event later than  February  28,
1997,  and the  "Option  Period"  shall be the period  commencing  on the Option
Purchase Date and expiring on the last day of the 16th month  following the date
upon which MMS receives  Installment  No. 2, but in no event later than June 30,
1998.  MMS agrees to extend the Option  Period  through July 31, 1998,  provided
ORION pays MMS an extension  fee of $2 million on or before June 30, 1998;  and,
provided the Lockheed  Martin price shall be increased by $700,000,  said amount
to be paid on or before June 30,1998.


3.       Consideration for Option.
         ------------------------

         (a) In consideration for the Option hereby granted, ORION shall pay MMS
the sum of US$ 49.4  million (the  "Option  Price"),  which sum shall be paid in
Installments as specified in the table below on or before the dates specified in
such table:

Option Agreement                        -1-

<PAGE>




 Installment  Payment Date      Total Option        Installment     Installment 
 -----------  ------------      ------------        -----------     ----------- 
    No.                          Installment          Amount           Amount   
    ---                          -----------          ------           ------   
                                    Amount          (Spacecraft)     (Launcher)
                                    ------          ------------     ----------

    1         Dec. 31, 1996    US $ 1.0 Million      [        ]      [        ]
    2         Feb. 28, 1997    US $ 2.0 Million      [        ]      [        ]
    3         Mar. 31, 1997    US $22.0 Million      [        ]      [        ]
    4         June 15, 1997    [              ]      [        ]      [        ]
    5         July 31, 1997    [              ]      [        ]      [        ]
    6         Dec. 31, 1997    [              ]      [        ]      [        ]
- --------------------------------------------------------------------------------

      Total                  US$ 49.4 Million  US$ 40.0 Million  US$ 9.4 Million

*Consists of $200,000  already  paid and $800,000 to be paid to Lockheed  Martin
(Launcher  provider) for a Launch  reservation  (covering the period May 1, 1999
through July 31, 1999).


         (b)      MMS shall provide ORION ten (10) days   written notice of each
payment due hereunder after Installment No.3;

         (c)      The Option Price  shall  not be refundable in whole or in part
under any circumstances, including the bankruptcy or insolvency of ORION;

         (d)  The  parties  have  agreed  that,  in the  event  ORION's  planned
financings  are not  closed and funds  disbursed  by March 31,  1997,  ORION may
extend Installment No.3 until April 30, 1997 by making a partial payment of $2.5
million _________________________________  ______________ on or before March 31,
1997.  Moreover,  to the extent net proceeds  from ORION's  planned  public debt
financings  are greater than _________________  (exclusive of prefunded  amounts
to pay  interest),  ORION  will  accelerate  Installments  No.4  and No.6 of the
Launcher Payments.


4. Manner of Exercise of Option. ORION may exercise the Option by paying to MMS,
on or before the date the  Option  Period  expires,  the sum  ("Option  Exercise
Price") of cumulative Milestone Payments and Progress Payments payable under the
ORION 2 Purchase  Contract  through the  exercise  date,  less the Option  Price
already paid under Section 3(a) above.


5.  Title to Work.  MMS  shall  retain  title to all work in  progress  from the
Effective Date unless and until ORION  exercises the Option.  In the event ORION
exercises the Option in the manner provided by this Agreement,  title to work in
progress shall be governed by the ORION 2 Purchase Contract, as amended.

Option Agreement                       -2-

<PAGE>



6.       MMS's Covenant.  MMS covenants to ORION and ORION acknowledges that (a)
upon receipt of Installment No. 2 detailed in Clause 3 hereof, MMS will commence
to perform  the Work (and MMS will  continue  to perform  the Work  through  the
expiration of the Option Period,  provided ORION pays each Installment  detailed
in Clause 3 hereof on the  Payment  Date),  as  defined  in the ORION 2 Purchase
Contract, as though the ORION 2 Purchase Contract were then effective and (b) in
order to perform the Work  according  to the  schedule  set forth in the ORION 2
Purchase Contract,  MMS will be required to expend funds in excess of the Option
Price.


7.       Representations.
         (a) MMS  represents,  warrants and covenants  that it has the authority
and  the  right  sufficient  to  grant  the  Option  and to  perform  all of its
obligations  under this Agreement and that MMS's performance of such obligations
will not violate any other agreement to which MMS is a party.


         (b)  ORION  represents  and  warrants  that  (1) it has the  power  and
authority to execute,  deliver, and perform this Option Agreement, (2) it is not
entering into this Agreement with an intent to hinder,  delay, or defraud any of
its creditors,  and (3) the making of the payments required to be made hereunder
will not, at the time such payments are made, cause ORION to be insolvent.


8.  Confidentiality.  Each  Party  acknowledges  that it may,  in the  course of
performing its responsibilities  under this Agreement,  be exposed to or acquire
information  that is proprietary  to or  confidential  to the other Party.  Each
Party agrees to hold such  information in strict  confidence and not to disclose
such  confidential  information  for  any  purpose  whatsoever  other  than  the
performance of its obligations as contemplated by this Agreement (or as required
by law or regulation)  and to advise each of its employees who may be exposed to
such proprietary and  confidential  information of his or her obligation to keep
such information  confidential.  This obligation of confidentiality will survive
the termination or expiration of this Agreement.


9. Failure to Exercise Option or to Make Payments -- Sole and Exclusive  Remedy.
In the event:  (a) ORION fails to exercise the Option in the manner  provided in
this  Agreement on or before the date the Option  Period  expires;  or (b) ORION
fails to make any Installment Payment detailed in Clause 3 hereof (after receipt
of proper  notice as set forth in Clause 3) on or before the dates  specified in
Clause  3;  then,  at its  option,  MMS  may  terminate  this  Option  Agreement
immediately  upon written  notice to ORION and retain all money paid by ORION to
MMS pursuant to this  Agreement and the ownership of all work in progress.  This
is MMS' sole remedy for ORION's failure to make any Option Installment Payments.


10. Term and Termination. The term of this Agreement will begin on the Effective
Date and will continue until the earliest to occur of the  following:  (i) ORION
exercises the Option in the manner provided in this Agreement; (ii) the last day
of the Option Period  expires;  (iii) MMS  terminates  this Option  Agreement in
accordance  with  Section 9; and (iv) the date upon which ORION and MMS mutually
agree to terminate this  Agreement.  In addition,  MMS may terminate this Option
Agreement,  if on March 31, 1997 (or April 30,  1997,  if  extended  pursuant to
Section 3(d) hereof),  Restated  Amendment #10 of even date is not in full force
and effect and there is no default thereunder.

Option Agreement                       -3-


<PAGE>

11. Notices. Any notice or other communication  required or permitted to be made
or given by either Party  pursuant to this Agreement will be deemed to have been
duly  given:  (i) five (5)  business  days  after the date of mailing if sent by
registered  or  certified  U.S.  mail,  postage  prepaid,  with  return  receipt
requested; (ii) when transmitted if sent by facsimile, confirmed by the specific
addressee,  with a copy  of  such  facsimile  promptly  sent  by  another  means
specified in this section;  or (iii) when  delivered if delivered  personally or
sent by express courier service.  All notices will be sent to the other party at
its address as set forth below or at such other  address as such Party will have
specified in a notice given in accordance with this section:

    ----------------------------------------------------------------------------
    In the case of ORION:                      with a copy to:
    ----------------------------------------------------------------------------
    
    Orion Satellite Corporation                Shaw, Pittman, Potts & Trowbridge
    2440 Research Boulevard, Suite 400         2300 N Street, N.W.
    Rockville, MD   20850                      Washington, D.C.   20037
    Tel:     (301) 258-8101                    Tel:     (202) 663-8181
    Fax:     (301) 258-3300                    Fax:     (202) 663-8007
    Attn:    Dr. Denis Curtin, Senior Vice     Attn:    John F. Dealy
    President, Engineering and Satellite
    Operations, for technical matters
    Attn:    Richard Shay, Esquire, Vice
    President of Corporate and Legal 
    Affairs, for contract matters
    ----------------------------------------------------------------------------

    ------------------------------------
    In the case of MMS:
    ------------------------------------
    
    Matra Marconi Space UK Limited 
    Gunnels Wood Road
    Stevenage, Hertfordshire SG1 2AS
    England
    Tel:     + 44 (0) 1438 313456
    Fax:     + 44 (0) 1438 773637
    Attn:    Barrie Kirk, ORION Project 
    Manager, for technical or management
    matters
    Attn:    Arthur Blick, Commercial 
    Manager, for commercial matters
    ------------------------------------

12.      Rights Cumulative.     All  rights,  powers  and  privileges  conferred
hereunder upon the Parties,  unless otherwise provided,  shall be cumulative and
shall not be  restricted  to those given by law.  Failure to exercise  any power
given any party hereunder or to insist upon strict compliance by any other party
shall not  constitute a waiver of any party's  right to demand exact  compliance
with the terms hereof.

13.  General.  This  Agreement  (and any Exhibits  hereto) sets forth the entire
understanding  between  the  Parties  with  respect  to its  subject  matter and
supersedes  all prior and

Option Agreement                       -4-
<PAGE>

contemporaneous  agreements and  understandings  with respect thereto other than
the MOA and the ORION 2 Purchase Contract. This Agreement may be amended only by
a written instrument signed by an authorised  representative of each Party. This
Agreement  shall not  constitute,  give effect to, or otherwise  imply,  a joint
venture,   pooling   arrangement,   partnership,   agency  or  formal   business
organisation  of any kind.  ORION may assign or transfer  this  Agreement to any
party that (i)  demonstrates to MMS's  reasonable  satisfaction  that it has the
financial  ability to pay the Option Exercise Price and (ii) is within the scope
of any export license requirements  applicable to MMS's performance of the work.
MMS shall not assign,  delegate or in any manner transfer this Agreement without
the prior  written  consent of ORION.  No waiver,  delay or discharge by a Party
will be valid unless in writing and signed by an  authorised  representative  of
the Party against which its enforcement is sought.  Provisions of this Agreement
which by their express terms impose  continuing  obligations on the Parties will
survive the expiration or  termination  of this  Agreement for any reason.  This
Agreement will be governed by and construed in accordance  with the  substantive
laws of the State of  Maryland,  exclusive  of its choice of law  rules.  If any
provision of this Agreement is declared invalid or otherwise unenforceable,  the
enforceability of the remaining provisions shall be unimpaired,  and the Parties
shall  replace  the  invalid  or  unenforceable   provision  with  a  valid  and
enforceable  provision  that reflects the original  intentions of the Parties as
nearly as possible in  accordance  with  applicable  law. This  Agreement  shall
benefit the Parties hereto only.


         IN WITNESS  WHEREOF,  the  Parties  have caused  this  Agreement  to be
executed by their duly authorised representatives, with an Effective Date as set
forth in the introductory paragraph of this Agreement.


          INTERNATIONAL PRIVATE                     MATRA MARCONI SPACE
          SATELLITE PARTNERS, L.P.                  UK LIMITED
      By: Orion Satellite Corporation,
          its General Partner

      By:  /s/W. Neil Bauer                      By: /s/A. Carlier
          ----------------------------               -------------------------- 
          (Signature)                               (Signature)

              W. NEIL BAUER                             A. CARLIER
          ----------------------------              ---------------------------
          (Name Printed)                            Name Printed)

              PRESIDENT & CEO                           CHAIRMAN AND CEO
          ----------------------------              ---------------------------
          (Title)                                   (Title)






Option Agreement                         -5-



The portions of this Exhibit for which confidential treatment has been requested
are marked by brackets ([ ]). In addition,  an asterisk (*) appears in the right
hand margin of each  paragraph in which  confidential  information  is included.


                            MEMORANDUM OF AGREEMENT
                                       FOR
                        PROCUREMENT OF ORION 2 SPACECRAFT


         The following  agreement  ("Agreement") is effective as of December 10,
1996 ("Effective Date") by and between International Private Satellite Partners,
L.P.,  d/b/a Orion  Atlantic,  L.P.,  a Delaware  limited  partnership  with its
principal offices located at 2440 Research Boulevard, Rockville, Maryland 20850,
U.S.A.  ("ORION") and Matra Marconi  Space UK Limited,  a company  organised and
existing under the laws of England and Wales with its  registered  office at The
Grove, Warren Lane, Stanmore,  Middlesex, HA7 4LY, England ("MMS"),  hereinafter
singularly known as "the Party" or collectively as "the Parties."


         WHEREAS,  the Parties entered into an agreement  (known as the "ORION 2
Purchase Contract") dated July 31, 1996 under which ORION agreed to purchase and
MMS agreed to sell, subject to certain conditions, a follow-on spacecraft to the
ORION 1 Spacecraft to provide  coverage over the Atlantic and to be known as the
"Orion 2 Spacecraft";


         WHEREAS, the Parties desire to amend the Orion 2 Purchase Contract;


         WHEREAS, the Parties have reached agreement, as set forth below, on the
basic terms acceptable to both Parties for the amendment to the ORION 2 Purchase
Contract; and


         WHEREAS,  the  Parties  intend to enter  into (a) an  option  agreement
substantially  in the form  attached  hereto as Exhibit 1 pursuant  to which the
Contractor will grant to ORION an option to purchase the ORION 2 Spacecraft upon
the terms and conditions  set forth in such  agreement (the "Option  Agreement")
and (b) the  Restated  Amendment  No.  10 to the  Second  Amended  and  Restated
Purchase Contract,  dated as of 26th September 1991, between ORION and MMS Space
Systems Limited attached hereto as Exhibit 2 ("Amendment No. 10");


         NOW,   THEREFORE,   in   consideration   of  the  mutual  promises  and
undertakings  contained  herein,  the Parties,  intending  to be legally  bound,
hereby agree as follows:


         1. All terms  used  herein  and not  defined  shall  have the  meanings
attributed to them in the ORION 2 Purchase Contract.




Memorandum of Agreement               -1-


<PAGE>



         2.      Fixed Price.
                 -----------

         The Contract Price is comprised of the following elements:

                                                     ______________
                 ORION 2 Spacecraft                 [              ]
                 Launch Vehicle                     [              ]
                 Launch Services                    [              ]
                 Total Contract Price               [______________]


         Launch  Insurance is not included in the Contract  Price.  The Contract
Price shall remain fixed until and through April 30, 1997.


         3.       Milestone Payments and Termination Liability Amounts.
                  ----------------------------------------------------

         Part 1(B) of the ORION 2 Purchase  Contract shall be amended to reflect
the new schedule developed  pursuant to Section 8 hereof and, as revised,  shall
maintain the timing of payments in said Part 1(B).


         4.       Vendor Financing.    The  ORION  2  Purchase Contract shall be
amended to delete all references to vendor financing.


         5.       Delivery Schedule.   Subject  to  the availability of a Launch
Slot,  Delivery  shall occur on or before  28.25 months from the date upon which
MMS receives  Installment No. 2 under the Option Agreement,  provided ORION does
not fail to make any payment under the Option Agreement when due.


         6. Launch Provider and Launch Reservation. MMS shall use all reasonable
commercial  efforts to reserve with Lockheed  Martin a Launch Slot  occurring no
later  than  July 1999 at a  reservation  cost not to exceed  One  Million  U.S.
Dollars ($U.S. 1,000,000), said reservation cost ($800,000 plus $200,000 already
paid) to be paid by ORION no later than  December  31, 1996.  MMS shall  arrange
termination  provisions  with the  selected  launch  provider  such that MMS can
enforce  the  termination  and  repayment  provisions  of the  ORION 2  Purchase
Contract, as amended.


         7.       Access.  Appropriate provisions will be negotiated between the
Parties and included in the Definitive Purchase Agreement.


         8.       Scheduling.   The ORION 2 Spacecraft documents, as detailed in
the  ORION 2  Purchase  Contract,  as  amended,  shall  be  revised  to  reflect
scheduling revisions of Reviews and Tests resulting from the new payment profile
in the Option Agreement.

Memorandum of Agreement                -2-

<PAGE>

         9. Repeater Subcontractor.  MMS has advised ORION that NEC presently is
unwilling to proceed on the risk sharing  basis set forth in this  Agreement and
the Option Agreement.  MMS will continue to negotiate with NEC and, if unable to
reach  agreement  by  December  31,  1996,  will  proceed to perform the program
without NEC as repeater subcontractor, unless ORION elects to provide additional
consideration to NEC beyond that set forth in the Option Agreement.


         10.  Negotiation  of  Definitive  Agreements.   The  Parties  agree  to
negotiate diligently and in good faith to amend the ORION 2 Purchase Contract in
accordance  with the terms set forth  herein  and in the Option  Agreement  (the
"Definitive  Purchase  Agreement").  The Parties  intend that such  negotiations
commence promptly upon the Effective Date of this Agreement.


         11.    Term and Termination.  The term of this Agreement shall begin on
the Effective  Date and shall continue until the earlier of (i) the execution of
the Definitive Purchase Agreement, or (ii) April 30, 1997.


         12. Confidentiality. Each Party acknowledges that it may, in the course
of  performing  its  responsibilities  under  this  Agreement,  be exposed to or
acquire information that is proprietary or confidential to the other Party. Each
Party agrees to hold such  information in strict  confidence and not to disclose
such  confidential  information  for  any  purpose  whatsoever  other  than  the
performance of its obligations as contemplated by this Agreement (or as required
by law or regulation)  and to advise each of its employees who may be exposed to
such proprietary and  confidential  information of his or her obligation to keep
such information  confidential.  This obligation of confidentiality will survive
the termination or expiration of this Agreement.


         13. Rights  Cumulative.  All rights,  powers and  privileges  conferred
hereunder upon the Parties,  unless otherwise provided,  shall be cumulative and
shall not be  restricted  to those given by law.  Failure to exercise  any power
given any party hereunder or to insist upon strict compliance by any other party
shall not  constitute a waiver of any party's  right to demand exact  compliance
with the terms hereof.


         14.  General.  This Agreement (and any Exhibits  hereto) sets forth the
entire understanding  between the Parties with respect to its subject matter and
supersedes  all prior and  contemporaneous  agreements and  understandings  with
respect  thereto.  This  Agreement  shall not  constitute,  give  effect  to, or
otherwise imply, a joint venture,  pooling arrangement,  partnership,  agency or
formal business  organisation of any kind. Neither Party shall assign,  delegate
or in any manner  transfer this Agreement  without the prior written  consent of
the other Party, which consent shall not be unreasonably  withheld,  except that
ORION may assign this  Agreement to any party to whom ORION may assign the ORION
2 Purchase  Contract.  No waiver,  delay or  discharge  by a Party will be valid
unless in  writing  and  signed  by an  authorised  representative  of the Party
against which its  enforcement  is sought.  Provisions of this Agreement that by
their express terms or context impose continuing obligations on the Parties will
survive the expiration or  termination  of this  Agreement for any reason.  This
Agreement will be governed by and construed in accordance  with the  substantive
laws of the  

Memorandum of Agreement                 -3-

<PAGE>

State of Maryland,  exclusive of its choice of law rules.  This Agreement may be
amended only by a written  instrument signed by an authorised  representative of
each Party. This Agreement is limited to the subject matter hereof and shall not
bind,  limit or otherwise  affect  either Party with regard to other  spacecraft
configurations or different orbital locations.






         IN WITNESS  WHEREOF,  the  Parties  have caused  this  Agreement  to be
executed by their duly authorised representatives, with an Effective Date as set
forth in the introductory paragraph of this Agreement.


INTERNATIONAL PRIVATE                             MATRA MARCONI SPACE UK LIMITED
SATELLITE PARTNERS, L.P.

By:  Orion Satellite Corporation, its                     
General Partner

/s/W. Neil Bauer                                  /s/Armand Carlier
- -----------------------------------               ------------------------------
(Signature)                                       (Signature)

   W. NEIL BAUER                                     ARMAND CARLIER
- -----------------------------------               ------------------------------
(Name Printed)                                    (Name Printed)

   PRESIDENT & CEO                                   CHAIRMAN AND CEO
- -----------------------------------               ------------------------------
(Title)                                                 (Title)






   
Memorandum of Agreement               -4-



The portions of this Exhibit for which confidential treatment has been requested
are marked by brackets ([ ]). In addition,  an asterisk (*) appears in the right
hand margin of each  paragraph in which  confidential  information  is included.


                          TT&C EARTH STATION AGREEMENT




                                     between




                            ORION ASIA PACIFIC CORP.



                                       and



                                   DACOM CORP.







                            Dated: November 11, 1996




<PAGE>
<TABLE>
<CAPTION>

                                Table of Contents
                                -----------------


                                                                                                          Page
<S>                  <C>                                                                                   <C>
ARTICLE 1.           FUNCTIONS TO BE PERFORMED BY THE TT&C
                     EARTH STATION.................................................................           1


         1.1.        Purpose of the TT&C Earth Station  ...........................................           1
         1.2.        Particular Functions of the TT&C Earth Station  ..............................           1
         1.3.        Future Modification of Functions  ............................................           1

ARTICLE 2.           SITE SELECTION   .............................................................           2

         2.1.        Site Selection  ..............................................................           2
         2.2.        Government Approvals  ........................................................           2
         2.3.        Land Acquisition  ............................................................           2
         2.4.        Termination if Steps Not Taken  ..............................................           2

ARTICLE 3.           CONSTRUCTION; ANTENNA   ......................................................           2

         3.1.        General  .....................................................................           2
         3.2.        The Antenna  .................................................................           3

ARTICLE 4.           TT&C EQUIPMENT   .............................................................           3

         4.1.        Supply of TT&C Equipment  ....................................................           3
         4.2.        Shipments; Duties  ...........................................................           3
         4.3.        Spares, Tooling, Supplies, etc.  .............................................           4
         4.4.        Title to TT&C Equipment  .....................................................           4

ARTICLE 5.           TESTING   ....................................................................           4

         5.1.        TT&C Equipment Testing and Acceptance  .......................................           4
         5.2.        Antenna Testing and Acceptance  ..............................................           4
         5.3.        TT&C Earth Station Testing and Acceptance  ...................................           5
         5.4.        Periodic Testing  ............................................................           5

ARTICLE 6.           PERSONNEL   ..................................................................           5

         6.1.        DACOM Personnel  .............................................................           5
         6.2.        Training  ....................................................................           6
         6.3.        Initial Advisory Supervision and On-Site Training  ...........................           6
         6.4.        Confidentiality Agreements  ..................................................           6

ARTICLE 7.           OPERATION OF THE TT&C EARTH STATION   ........................................           6

         7.1.        Operations  ..................................................................           6
         7.2.        Personnel; Utilities and Supplies; Security; etc.  ...........................           7
         7.3.        Maintenance and Repair  ......................................................           7
         7.4.        Destruction of the TT&C Earth Station  .......................................           8

                                       i
<PAGE>




ARTICLE 8.           REPORTS AND DOCUMENTATION   ..................................................           8

         8.1.        Summaries  ...................................................................           8
         8.2.        Logs  ........................................................................           9
         8.3.        Regular Periodic Reports  ....................................................           9
         8.4.        Special Reports of Anomalous Events  .........................................           9
         8.5.        Format of Logs and Reports  ..................................................           9

ARTICLE 9.           CHARGES; PAYMENTS    .........................................................           9

         9.1.        Charges  .....................................................................           9
         9.2.        Payments, Taxes and Bank Charges   ...........................................          10
         9.3.        Time of Payment  .............................................................          10
         9.4.        Interest  ....................................................................          11

ARTICLE 10.          TERM; TERMINATION   ..........................................................          11

         10.1.       Term  ........................................................................          11
         10.2.       Termination  .................................................................          11
         10.3.       Payment of Charges  ..........................................................          11
         10.4.       Certain Provisions Survive Termination  ......................................          11
         10.5.       Option to Purchase or Lease the Site and the TT&C
                     Earth Station upon Termination  ..............................................          12
         10.6.       Subsequent Modification or Expansion  ........................................          12

ARTICLE 11.          FORCE MAJEURE   ..............................................................          12

ARTICLE 12.          GOVERNMENTAL APPROVALS   .....................................................          13

         12.1.       Korean Government Approvals  .................................................          13
         12.2.       United States Government Approvals  ..........................................          13

ARTICLE 13.          RISK   .......................................................................          13

         13.1.       Risk of Loss  ................................................................          13
         13.2.       Insurance  ...................................................................          13

ARTICLE 14.          INDEMNIFICATION; DAMAGES   ...................................................          14

         14.1.       Indemnification  .............................................................          14
         14.2.       Consequential Damages  .......................................................          14
         14.3.       Procedure for Indemnification  ...............................................          14

ARTICLE 15.          CONFIDENTIALITY   ............................................................          15

         15.1.       Confidentiality  .............................................................          15
         15.2.       Confidentiality Agreements  ..................................................          15

ARTICLE 16.          ASSIGNMENT   .................................................................          16

         16.1.       Succession and Assignment  ...................................................          16
         16.2.       Change of Control  ...........................................................          16


                                       ii
<PAGE>

ARTICLE 17.          REPRESENTATIONS AND WARRANTIES OF ORION   ....................................          16

         17.1.       Representation and Warranties  ...............................................          16
         17.2.       Exclusion of Warranties  .....................................................          17

ARTICLE 18.          REPRESENTATIONS AND WARRANTIES OF DACOM  .....................................          17

         18.1.       Incorporation, Power, etc.  ..................................................          17
         18.2.       Due Authorization of Agreement; No Conflict with
                     Other Instruments  ...........................................................          17
         18.3.       Government Regulation  .......................................................          17
         18.4.       Exclusion of Warranties  .....................................................          17


ARTICLE 19.          MISCELLANEOUS   ..............................................................          18

         19.1.       Further Assurances  ..........................................................          18
         19.2.       Taxes and Expenses  ..........................................................          18
         19.3.       Press Releases and Public Announcements  .....................................          18
         19.4.       Notices  .....................................................................          18
         19.5.       No Third-Party Beneficiaries  ................................................          19
         19.6.       Governing Law; Arbitration  ..................................................          19
         19.7.       Amendments and Waivers  ......................................................          19
         19.8.       Matters of Construction, Interpretation and the Like  ........................          20

ARTICLE 20.          DEFINITIONS   ................................................................          20



EXHIBIT A            FUNCTIONS TO BE PERFORMED BY THE TT&C EARTH STATION

EXHIBIT B            CONSTRUCTION SPECIFICATIONS FOR THE TT&C EARTH STATION

EXHIBIT C1            ANTENNA SPECIFICATIONS

EXHIBIT C2           RF/IF REQUIREMENTS INCLUDING TEST TRANSLATOR

EXHIBIT D            TT&C EQUIPMENT

EXHIBIT E            TESTING

EXHIBIT F            INITIAL JOB SPECIFICATIONS, NUMBER OF PERSONNEL AND QUALIFICATIONS

EXHIBIT G            FORM OF CONFIDENTIALITY AGREEMENT

EXHIBIT H            CONSTRUCTION CHARGES

</TABLE>

                                      iii
<PAGE>
                          TT&C EARTH STATION AGREEMENT
                          ----------------------------

   
                  This TT&C EARTH  STATION  AGREEMENT,  dated as of November 11,
1996 by and between  ORION ASIA  PACIFIC  CORP.,  a  corporation  organized  and
existing  under the laws of  Delaware,  U.S.A.  ("Orion"),  and DACOM  CORP.,  a
corporation organized and existing under the laws of Korea ("DACOM"),
    

                              W I T N E S S E T H:

                  WHEREAS,  Orion  intends to  establish in Korea a facility for
the  transmission  of  tracking  telemetry  and  command  signals to the Orion 3
Satellite  ("Orion  3")  and  under  certain  circumstances,  to  a  replacement
satellite and/or a successor satellite (collectively, the "Satellite"); and

                  WHEREAS, DACOM wishes to establish and operate in Korea one of
the facilities for the transmission to the Satellite of tracking,  telemetry and
command  signals  generated  by Orion (the "TT&C Earth  Station"),  and Orion is
willing to have the backup TT&C Earth  Station  located in Korea and operated by
DACOM, upon the terms and conditions contained in this Agreement.

                  Certain terms used herein are defined in Article 20.

                  NOW,  THEREFORE,  in  consideration  of  the  foregoing,   and
intending to be legally bound, the parties hereto agree as follows:

                                   ARTICLE 1.

               FUNCTIONS TO BE PERFORMED BY THE TT&C EARTH STATION
               ---------------------------------------------------

   
         1.1. Purpose of the TT&C Earth Station. The TT&C Earth Station is to be
constructed and operated pursuant to this Agreement to transmit to the Satellite
and receive from the Satellite  electronic  signals for the tracking,  telemetry
and  command  ("TT&C")  of the  Satellite,  including  stationkeeping,  attitude
control and other  satellite  maintenance  and  switching  functions as shall be
necessary to operate the  Satellite  and the  transponders  and other  equipment
thereon as contemplated by the Joint Investment  Agreement and the various other
agreements  with  users of the  Satellite  and of such  transponders  and  other
equipment, and to receive signals from the Satellite relating to the Satellite's
condition and  operations.  The TT&C Earth Station is to be operational for such
purpose on a twenty-four hours per day, seven days per week, fifty-two weeks per
year  basis  from the TT&C  Acceptance  Date  until  the end of the Term of this
Agreement.
    

         1.2.  Particular  Functions  of the  TT&C  Earth  Station.  On the TT&C
Acceptance  Date,  the TT&C Earth Station and the  personnel  operating the TT&C
Earth  Station,  including CSM  Operations,  are to be capable of performing the
functions  summarized  in Exhibit A hereto,  in  accordance  with the  standards
contained therein.

         1.3. Future  Modification of Functions.  Orion and DACOM recognize that
during the Term of this  Agreement,  it may become  necessary or  appropriate to
modify or supplement  the  functions  summarized in Exhibit A hereto in order to
take account of changed  conditions or new  technology.  If Orion concludes that
such a modification  or  supplementation  has become  necessary or  appropriate,
Orion  shall  so  notify  DACOM  at least 60 days  before  the  date  when  such
modification  or  supplementation  is to be  implemented.  Orion and DACOM shall
cooperate in effecting each such modification or

<PAGE>



supplementation,  upon the terms  provided in this  Agreement  for the  original
construction,  equipping and operation of the TT&C Earth  Station,  or upon such
other terms as Orion and DACOM may agree.


                                   ARTICLE 2.

                                 SITE SELECTION
                                 --------------

         2.1.  Site  Selection.  The TT&C Earth Station shall be located at such
place in ______ as shall be selected by DACOM, after consultation with Orion and
with  Orion's  consent,   which  shall  not  be  unreasonably  withheld.  It  is
anticipated  that the site will be co-located with other similar DACOM satellite
operations.  Orion's  consent shall be based upon technical  factors such as the
quality of the  signals  to be  received  by the  Satellite  from the Site,  the
availability of support  services at the Site (such as reliable  uninterruptible
primary and backup  electric power,  water,  heat,  waste  disposal,  personnel,
security  services  and the like),  the  availability  of adequate  and reliable
communications   and   transportation  to  and  from  the  Site,   freedom  from
electromagnetic interference, and similar factors. Initial selection of the Site
shall be made by DACOM as soon as  practicable  after  execution and delivery of
this Agreement.

         2.2. Governmental  Approvals.  DACOM shall be responsible for obtaining
all necessary  governmental approvals from the government of _____, and from all
other Governmental Bodies within Korea having jurisdiction,  with respect to all
aspects of the selection of the Site, the purchase or lease of real estate,  the
construction  and equipping of the TT&C Earth Station,  and the operation of the
TT&C Earth Station, pursuant to this Agreement.

         2.3. Land Acquisition.  DACOM shall either purchase or lease sufficient
land for the  construction  and operation of the TT&C Earth Station  pursuant to
this Agreement;  provided,  however, that the total purchase price for such land
or the aggregate  lease  payments for the entire term of the lease,  as the case
may be,  shall not exceed  ________________________________________________.  If
the land is  purchased or leased by DACOM,  DACOM shall make the land  available
for uses contemplated herein and for the Term of this Agreement.

         2.4.  Termination if Steps Not Taken. If by June 30, 1997, (i) the Site
has not been  selected by DACOM and  consented  to by Orion  pursuant to Section
2.1,  or (ii) the land for the TT&C  Earth  Station  has not been  purchased  or
leased  pursuant to Section 2.3, then Orion may terminate  this  Agreement  upon
notice to DACOM given not more than 60 days after June 30, 1997.

                                   ARTICLE 3.

                              CONSTRUCTION; ANTENNA
                              ---------------------

         3.1. General. As soon as practicable after full compliance with Article
2, DACOM shall cause the Site to be prepared for  construction  and operation of
the TT&C  Earth  Station  (including  ground  preparation  and  construction  of
foundations  for the  Antenna  and the other TT&C  Equipment),  shall  cause the
buildings  to be located on the Site to be  constructed,  erected,  equipped and
supplied with all necessary  utilities and other  services,  and shall cause all
equipment (except equipment to be supplied by Orion pursuant to Article 4) to be
constructed and installed at the Site, all in accordance  with the  Construction
Specifications attached hereto as Exhibit B, and all at

                                      -2-
<PAGE>



the expense of DACOM  except as provided  in Section  3.2.  Orion shall have the
right,  upon its  request  to  DACOM,  to  inspect  all  civil,  mechanical  and
electrical engineering and construction contracts, and all other contracts, with
third parties relating to such  construction,  erection,  equipping,  supply and
installation,  as well as all site  layout  plans and  detailed  mechanical  and
electrical drawings related to the TT&C Earth Station. If such contracts,  plans
and drawings are not reasonably  satisfactory  to Orion,  DACOM shall cause such
contracts, plans and drawings to be modified to Orion's reasonable satisfaction.
Orion  shall  have the right at any time with  prior  notification,  at  Orion's
expense, to have personnel  designated by Orion supervise,  inspect and test any
and  all  aspects  of  such  construction,   erection,   equipping,  supply  and
installation related to the TT&C Earth Station.

   
         3.2. The  Antenna.  In  coordination  with its  activities  pursuant to
Section 3.1, DACOM shall purchase,  construct,  install and erect an antenna and
related  systems and  equipment to the interface  point in  accordance  with the
Antenna Specifications attached hereto as Exhibit C, and having the capabilities
specified  in Exhibit C. Orion shall have the right,  upon its request to DACOM,
to inspect all civil,  mechanical and electrical  engineering  and  construction
contracts,  and  all  other  contracts,  with  third  parties  relating  to such
purchase,  construction,  installation and erection,  as well as all site layout
plans and detailed mechanical and electrical drawings. If such contracts,  plans
and drawings are not reasonably  satisfactory  to Orion,  DACOM shall cause such
contracts, plans and drawings to be modified to Orion's reasonable satisfaction.
Orion shall have the right at any time, at Orion's  expense,  to have  personnel
designated  by Orion  supervise,  inspect  and test any and all  aspects of such
construction, installation and erection. Construction, installation and erection
of the  Antenna  shall  be  completed  by  DACOM  by such  date  as will  permit
acceptance  of the Antenna to occur on or prior to April 30,  1998,  or as to be
agreed  at the  Final  Design  Review,  as  specified  in  Section  5.2 of  this
Agreement.
    


                                   ARTICLE 4.

                                 TT&C EQUIPMENT
                                 --------------

         4.1. Supply of TT&C Equipment. Orion shall cause to be delivered to the
Site and  installed  the  equipment  specified  in  Exhibit D hereto  (the "TT&C
Equipment").  Exhibit D may be modified or  supplemented by Orion in any respect
at any time before the TT&C Acceptance Date, if in Orion's  reasonable  judgment
such  modification  or  supplementation  is  necessary  or  appropriate  for the
efficient and profitable operation of the Satellite. Orion shall notify DACOM of
any such modification or  supplementation.  DACOM and its contractors and agents
shall cooperate with Orion in such installation,  at the expense of DACOM. Orion
shall  use its best  efforts  to cause  the TT&C  Equipment  to be  shipped  and
installed at times which  coordinate with DACOM's  construction  schedule at the
Site.  The TT&C  Equipment  shall be  assembled  in the  United  States,  unless
otherwise agreed between Orion and DACOM.

          4.2. Shipments; Duties. Orion shall be responsible for shipment of the
TT&C Equipment to the Site, by such means as Orion may choose. DACOM shall, upon
Orion's  request,  prepay all import duties and taxes,  port  charges,  property
taxes and similar governmental levies imposed upon Orion in connection with such
shipment and the installation and use of the TT&C Equipment at the Site. If such
import  taxes,  duties and  similar  fees are prepaid by DACOM at the request of
Orion,  Orion shall reimburse  DACOM in full for such prepayment  within 30 days
after  receipt of an invoice from DACOM  detailing  the amounts  prepaid.  DACOM
shall use reasonable efforts to

                                      -3-
<PAGE>



expedite  customs  clearance of the TT&C  Equipment  and to minimize  import and
other duties,  taxes,  fees and costs  imposed in connection  with the shipment,
installation and use of the TT&C Equipment at the Site.

         4.3.  Spares,  Tooling,  Supplies,  etc.  From time to time Orion shall
cause to be delivered to the Site, and installed if appropriate,  such spare and
replacement equipment, tooling and supplies for the TT&C Equipment as in Orion's
judgment is necessary or appropriate  for the operation of the TT&C Equipment as
contemplated by this Agreement.

         4.4. Title to TT&C Equipment.  All TT&C Equipment delivered to the Site
pursuant to this Article 4, or  otherwise  obtained by Orion for the purposes of
this Agreement,  shall be and remain the property of Orion, and DACOM shall have
no  interest  therein.  Orion may  sell,  lease,  mortgage,  impose a Lien on or
otherwise  deal with or dispose of any or all TT&C Equipment at any time or from
time to time,  so long as such TT&C  Equipment at the Site remains  available to
perform its functions as contemplated by this Agreement.  During the Term, Orion
shall  have the  right,  at any time or from time to time,  to  remove  any TT&C
Equipment  which is no longer needed at the Site for purposes of this Agreement.
At the end of the Term,  Orion shall have the right, at any time or from time to
time within 180 days after the end of the Term, to remove or cause to be removed
any or all of the TT&C Equipment then at the Site. If any of such TT&C Equipment
is not so removed  within such  180-day  period,  such TT&C  Equipment  shall be
deemed to have been abandoned by Orion.


                                   ARTICLE 5.

                                    TESTING
                                    -------

         5.1. TT&C Equipment  Testing and  Acceptance.  Prior to the shipment of
the TT&C  Equipment  to the Site,  Orion  shall  perform or cause the  equipment
manufacturers  to perform  testing to  determine  whether the TT&C  Equipment is
capable of performing the functions summarized in Exhibit A hereto. Such testing
of the TT&C  Equipment  shall be in  accordance  with the  Acceptance  Test Plan
contained in Exhibit E hereto.  Within 30 days  following the conclusion of such
testing,  Orion  shall  furnish  to DACOM  results  of the test data in  Orion's
possession  relating  to the  TT&C  Equipment  in a format  consistent  with the
Acceptance Test Plan. At the conclusion of such testing and following the review
of such  test  data by DACOM  and  Orion,  if any of the TT&C  Equipment  is not
capable  of  performing  the  functions  summarized  in  Exhibit A hereto in all
material   respects,   Orion  shall  use  reasonable   efforts  to  correct  the
deficiencies  in the  TT&C  Equipment.  Acceptance  of the  TT&C  Equipment  for
purposes  of the  performance  of  services  under  Article 7 shall  occur  upon
successful  completion of the testing described in this Section 5.1, which shall
be acknowledged by DACOM and Orion in writing upon completion.

         5.2  Antenna  Testing  and  Acceptance.  At a time  prior  to the  TT&C
Acceptance Date which is mutually  agreeable to Orion and DACOM, Orion and DACOM
shall  cooperate in performing  testing of the Antenna to determine  whether the
Antenna is capable of performing  the functions  summarized in Exhibit A hereto.
Such testing of the Antenna shall be in accordance with the Acceptance Test Plan
contained in Exhibit E hereto.  At the  conclusion of such testing and following
the review of such test data by DACOM and Orion,  if the  Antenna is not capable
of  performing  the  functions  summarized  in Exhibit A hereto in all  material
respects,  DACOM shall use reasonable efforts to correct the deficiencies in the
Antenna. Acceptance of the

                                      -4-
<PAGE>

   
Antenna for purposes of the  performance of services under Article 7 shall occur
upon successful  completion of the testing  described in this Section 5.2, which
shall be  acknowledged by DACOM and Orion in writing at the Site upon completion
(the "Antenna Acceptance Date");  provided,  however, that such acceptance shall
occur no later than April 30, 1998 or as determined at the Final Design Review.

         5.3. TT&C Earth Station Testing and  Acceptance.  Following the testing
and acceptance of the TT&C Equipment pursuant to Section 5.1 and the testing and
acceptance  of the  Antenna  pursuant  to  Section  5.2,  Orion and DACOM  shall
cooperate in performing  testing of the TT&C Earth Station to determine  whether
the TT&C Earth  Station is capable of commencing  operations in accordance  with
the Acceptance Test Plan contained in Exhibit E. Upon  successful  completion of
such testing,  Orion shall notify DACOM that the TT&C Earth Station is ready for
operation as contemplated by Article 1. Unless DACOM objects to such notice,  by
notice to Orion given  within 5 days after such notice to DACOM,  DACOM shall be
deemed to have  accepted  the TT&C Earth  Station as of the date of such  notice
from Orion to DACOM.  If DACOM  does give  notice of such  objection,  DACOM and
Orion shall negotiate in good faith to reach agreement on remedial measures,  if
any, to meet DACOM's objection,  and if DACOM and Orion are unable to reach such
agreement  within 90 days  after such  notice by DACOM,  this  Agreement  may be
terminated  by DACOM or Orion  after  the end of such  90-day  period.  The TT&C
Acceptance  Date  shall be the date of such  notice  from  Orion to DACOM or, if
DACOM  objects  to such  notice,  shall be the date when  DACOM and Orion  reach
agreement  on  any  remedial   measures  and  such  measures  are  completed  as
contemplated  by this Section 5.3. If the TT&C Acceptance Date does not occur on
or before September 30, 1998, either Orion or DACOM may terminate this Agreement
by notice given by the terminating party to the other party within 60 days after
September 30, 1998.
    

         5.4.  Periodic  Testing.  After the TT&C Acceptance Date and during the
Term,  DACOM and/or Orion shall perform such tests of the TT&C Earth Station and
the TT&C Equipment as are specified in Exhibit E hereto,  at the times specified
in said  Exhibit E.  Exhibit E may be modified or  supplemented  by Orion in any
respect at any time  during the Term,  if in Orion's  reasonable  judgment  such
modification or supplementation is necessary or appropriate.  Orion shall notify
DACOM of any such modification or supplementation.


                                   ARTICLE 6.

                                    PERSONNEL
                                    ---------

         6.1. DACOM  Personnel.  All personnel  necessary or appropriate for the
operation and maintenance of the TT&C Earth Station throughout the Term shall be
supplied by DACOM,  at the expense of DACOM.  Such personnel may be employees or
agents of DACOM or independent  contractors.  The number and  qualifications  of
such personnel shall at least meet the job  descriptions and other standards set
forth in Exhibit F hereto.  In  addition,  at all times  during the Term,  DACOM
shall  provide  sufficient  on-site  personnel at the TT&C Earth Station who are
fluent in English.  Exhibit F may be modified  or  supplemented  by Orion in any
respect at any time  during the Term,  if in Orion's  reasonable  judgment  such
modification  or  supplementation  is necessary or appropriate for the efficient
and profitable operation of the Satellite.  Orion shall notify DACOM of any such
modification or supplementation.  The technical abilities and job performance of
such personnel shall be reasonably  satisfactory to Orion, and if Orion notifies
DACOM with appropriate justification that any of such


                                      -5-
<PAGE>



personnel are not  satisfactory,  DACOM shall promptly replace such personnel or
take other  appropriate  action  satisfactory  to Orion.  However,  none of such
personnel shall be deemed to be employees of Orion,  and neither DACOM nor Orion
shall take any action  pursuant to this  Agreement  which  might  result in such
personnel  being  treated as employees of Orion for tax,  liability or any other
purposes.

   
         6.2.  Training.  At the request and at the expense of DACOM, Orion will
cause up to 5  persons  designated  by  DACOM to  receive  training  by  Orion's
qualified  personnel in such matters relating to the operation of the TT&C Earth
Station as DACOM may request and Orion may deem appropriate.  Each such training
session  shall  take  place  prior to the TT&C  Acceptance  Date  during  normal
business  hours at the  facilities  in  Rockville,  Maryland,  U.S.A.,  of Orion
Network Systems, Inc., or at such other facilities in the United States as Orion
may  designate by notice to DACOM.  The  substance and duration of such training
shall be within the complete discretion of Orion, and the formal training period
for any individual shall be up to 4 weeks.  Training  material shall be provided
prior to  commencement  of training.  Orion shall not impose any charge for such
training,  but  DACOM  shall be  responsible  for the  transportation,  housing,
maintenance  and other support of such persons in connection with such training,
and DACOM shall be responsible for any approvals of  Governmental  Bodies within
the United  States  required  for such persons to enter and remain in the United
States for such training.  In each year after the TT&C  Acceptance  Date, at the
request  of  DACOM,  Orion  will  cause up to 2 persons  designated  by DACOM to
receive similar training, upon the same terms and conditions.
    

         6.3.  Initial  Advisory  Supervision and On-Site  Training.  During the
period  commencing 30 days before the TT&C  Acceptance  Date and ending 120 days
after the TT&C  Acceptance  Date,  Orion shall  supply such numbers of qualified
technical or supervisory personnel as Orion may deem necessary or appropriate to
advise and train DACOM personnel  concerning the start-up and initial  operation
of the TT&C Earth Station.  Such Orion  personnel shall be available at the Site
at such times as DACOM or Orion deems  appropriate.  DACOM shall reimburse Orion
for the cost of local  transportation,  housing including adequate hotel room or
apartment,  maintenance  and other support of such personnel in connection  with
such   activities,   and  DACOM  shall  be  responsible  for  any  approvals  by
Governmental  Bodies in Korea  required  for such persons to enter and remain in
Korea for such  activities.  DACOM shall not be  responsible  for costs of Orion
personnel associated with in-orbit testing.

         6.4.  Confidentiality  Agreements.  Each person who  receives  training
pursuant to Section 6.2 shall, prior to the beginning of such training,  execute
and  deliver  to Orion a  confidentiality  agreement  in the form of  Exhibit  G
hereto.


                                   ARTICLE 7.

                       OPERATION OF THE TT&C EARTH STATION
                       -----------------------------------

         7.1.  Operations.  DACOM shall operate the TT&C Earth Station after the
TT&C Acceptance  Date and at all times during the Term of this  Agreement,  on a
twenty-four hours per day, seven days per week,  fifty-two weeks per year basis,
in such a manner that TT&C commands  generated by Orion at other  facilities and
transmitted to the TT&C Earth Station by such electronic or other means as Orion
may choose from time to time,  will be  transmitted to the Satellite as and when
directed  by  Orion,  and  that  signals  from  the  Satellite  relating  to the
Satellite's  condition and operations will be received by the TT&C Earth Station
and transmitted by the TT&C Earth Station to

                                      -6-
<PAGE>



Orion.  DACOM shall not transmit any other signals to the  Satellite,  except as
specifically directed by Orion. Such commands by Orion may be encrypted in whole
or in part,  and DACOM  shall not  de-encrypt  any such  encrypted  commands  or
signals except as specifically authorized by Orion. Orion may interrupt, suspend
or cease  transmitting such commands or signals to the TT&C Earth Station at any
time and for any reason deemed  sufficient by Orion in Orion's sole  discretion.
DACOM hereby  covenants  and agrees,  for itself and its  employees,  agents and
independent contractors,  to operate the TT&C Earth Station, at all times during
the Term, in a workmanlike  manner and in accordance with (a) generally accepted
worldwide  industry  standards for the operation of such TT&C stations,  and (b)
any directions given by Orion from time to time with respect to such matters.

         7.2.     Personnel; Utilities and Supplies; Security; etc.

                  (a) Personnel. DACOM shall have sufficient trained and capable
personnel at the TT&C Earth Station at all times,  and/or available on call near
the TT&C Earth Station,  to operate the TT&C Earth Station  pursuant to Sections
6.1 and 7.1 and to carry out the other  functions  required of DACOM pursuant to
this  Article 7. At all times,  the  on-site  personnel  provided by DACOM shall
include trained and capable personnel who are fluent in the English language. If
in Orion's  judgment the number or capabilities of such personnel are inadequate
with  appropriate  justification,  immediately  upon  notice  from Orion to that
effect DACOM shall provide such additional  trained and capable personnel at the
Site as Orion may request.

                  (b) Utilities  and Services.  DACOM shall cause the TT&C Earth
Station to be supplied with adequate  light,  heat, air  conditioning  and other
climate control,  uninterruptible primary and backup electric power, fire alarms
and fire  protection,  spare equipment,  tools,  supplies and other services and
materials  necessary  or  appropriate  in the judgment of Orion for the safe and
efficient operation of the TT&C Earth Station pursuant to this Agreement.

                  (c)  Security.  DACOM shall install and maintain such security
devices at the Site of the TT&C Earth Station, and provide such guards and other
security  measures,  as may be necessary or appropriate in the judgment of Orion
to prevent  unauthorized entry onto the Site and to maintain the confidentiality
of  all   technological   information   concerning  the  design,   construction,
installation and operation of the TT&C Equipment, the commands and other signals
sent to and from the TT&C Earth Station and all other Confidential Information.

                  (d) Visitation Rights.  Orion with prior notification to DACOM
may at any time,  at Orion's  expense,  send persons  designated by Orion to the
Site to observe the  operation of the TT&C Earth  Station,  inspect and test the
TT&C  Equipment,  and consult with TT&C  personnel at the TT&C Earth  Station or
elsewhere. DACOM shall cooperate fully with such persons.

         7.3.     Maintenance and Repair.

                  (a)  Regular  Maintenance  and  Routine  Repairs.  DACOM shall
perform such periodic maintenance and routine repairs of the TT&C Earth Station,
including the TT&C  Equipment,  as may be necessary or  appropriate to cause the
TT&C Earth Station and the TT&C Equipment to remain in good operating condition,
reasonable wear and tear excepted.  DACOM shall follow any instructions given by
Orion with respect to such periodic  maintenance and routine repairs.  If all or
part of the TT&C  Equipment  will be maintained  and/or  serviced  pursuant to a
contract between Orion


                                      -7-
<PAGE>



and the  manufacturer  and/or supplier of such  equipment,  Orion shall bear all
expenses in connection with such  maintenance or service  contract.  DACOM shall
permit authorized  representatives of such manufacturer  and/or supplier to have
access to the TT&C  Earth  Station  for the  purpose of  performing  maintenance
and/or repairs to the TT&C Equipment.

                  (b) Malfunctions  and Breakdowns.  If either party learns that
any portion of the TT&C Earth Station, or any portion of the TT&C Equipment, has
ceased to operate,  or may soon cease to operate,  in the manner contemplated by
this  Agreement,  or that for any  reason  the TT&C  Earth  Station  or the TT&C
Equipment is no longer able,  or may soon be unable,  to receive  commands  from
Orion and transmit such  commands to the Satellite and receive  signals from the
Satellite and transmit such signals to Orion,  as  contemplated  by Section 7.1,
the party learning of such condition  shall  immediately  notify the other party
thereof,  by telephonic or  electronic  communication.  In that event (except as
provided in Section  7.4) DACOM shall take such  remedial  action as Orion shall
specify,  and shall take no other action (except emergency action, if necessary)
to remedy such condition.  If such condition requires  modifications to the TT&C
Equipment  or  replacement  of any  TT&C  Equipment  and such  replacement  TT&C
Equipment is not available at the Site, Orion shall use its best efforts (except
as provided  in Section  7.4) to cause such  replacement  TT&C  Equipment  to be
delivered  to the Site as soon as  possible,  and shall  supply  such  technical
personnel to the Site as may be  necessary,  in Orion's  judgment,  to make such
modification or install such replacement TT&C Equipment.

   
                  (c)  Test  Equipment  and  Spares.  Orion  shall  provide  the
following  test  equipment as a minimum for general  operation  and  maintenance
purpose:
    

                  -----------------------

                  -----------------------

   
                  -----------------------

                  -----------------------

Orion also shall provide necessary spares for _____ and ________  equipment such
as  manufacturers  recommended  spares for  normal  operations.  During  initial
operation,  manufacturers  warranties  will  be  utilized  for  maintenance  and
calibration.
    

         7.4.  Destruction of the TT&C Earth Station.  If the TT&C Earth Station
is destroyed,  or is so damaged that it cannot  reasonably be repaired  within a
reasonable  time,  by  accident  or natural  catastrophe  or by any other  cause
whatsoever,  either Orion or DACOM may terminate this  Agreement  within 90 days
after such  destruction or damage.  Each party may carry such insurance  against
such damage or destruction as such party chooses, in the sole discretion of such
party, subject, however, to the provisions of Section 13.2.


                                   ARTICLE 8.

                            REPORTS AND DOCUMENTATION
                            -------------------------

         8.1.  Summaries.  DACOM shall  provide a summary,  in  English,  of all
reports,  procedures,  including Antenna test plans and instruction manuals, and
other

                                      -8-
<PAGE>



appropriate documentation with respect to the Antenna construction and operation
of the TT&C facility.

         8.2.  Logs.  DACOM  shall keep  daily  operations  logs in the  English
language  recording such data as Orion may request from time to time  concerning
the  use,  maintenance,  repair  and  replacement  of  TT&C  Equipment  and  the
operations of the TT&C Earth Station.  Such logs shall be available at all times
for inspection by Orion,  and at the request of Orion DACOM shall make copies of
such logs or portions thereof and supply such copies to Orion.

         8.3. Regular Periodic  Reports.  At least once a month during the Term,
DACOM shall give Orion a written report  summarizing  the operations of the TT&C
Earth Station during the previous month,  and containing such other  information
concerning  the TT&C Earth  Station and the TT&C  Equipment as Orion may request
from time to time.  Such  reports  shall be in the English  language and in such
format,  and with such  accompanying  data and detail, as Orion may request from
time to time.

         8.4. Special Reports of Anomalous Events. If the operations of the TT&C
Earth Station are  interrupted,  or if any of the TT&C  Equipment or the Antenna
malfunctions in any material respect or is damaged or destroyed, or if any other
unusual  event  occurs  which Orion  notifies  DACOM  should be the subject of a
special report,  DACOM shall give Orion a written report thereof containing such
other  information  concerning  the TT&C Earth Station and the TT&C Equipment as
Orion may request  from time to time.  Such  reports  shall be given to Orion as
soon as practicable after the event being reported,  and shall be in the English
language  and in such format,  and with such  accompanying  data and detail,  as
Orion may request from time to time.

         8.5. Format of Logs and Reports.  All logs and reports  provided for by
this  Article  8 may be  prepared  and/or  kept by  DACOM  in  either a paper or
electronic  format.  If such logs and reports are prepared  and/or kept by DACOM
electronically,  back-up  copies of such logs and reports  also must be prepared
and/or kept.


                                   ARTICLE 9.

                                CHARGES; PAYMENTS
                                -----------------

         9.1.     Charges.  DACOM and Orion shall pay the following Charges:

   
                  (a) Land Acquisition Charges.  Orion shall reimburse DACOM for
the amount  paid by DACOM to third  parties who are not  Affiliates  of DACOM to
purchase or lease the land for the Site  pursuant to Section 2.3,  provided that
the  total  amount  of such  reimbursement  shall not  exceed  Two-Thousand  and
Five-Hundred  United  States  Dollars  ($2,500  USD). If such land is purchased,
____________ of such land acquisition Charges shall be paid by Orion to DACOM on
the  Antenna  Acceptance  Date.  The  remaining   ______________  of  such  land
acquisition charges shall be paid by Orion to DACOM on the TT&C Acceptance Date.
If the land is leased,  Orion shall pay to DACOM on the Antenna Acceptance Date,
_________________ of the aggregate amount of all lease payments theretofore paid
by DACOM.  During the period  between the Antenna  Acceptance  Date and the TT&C
Acceptance  Date,  Orion shall pay to DACOM  ________________  of the  aggregate
amount of all lease  payments  paid by DACOM  during such period  within 15 days
after Orion  receives  appropriate  invoices  for such  Charges.  The  remaining
______________ of the
    

                                      -9-
<PAGE>



aggregate  lease payments paid by DACOM prior to the TT&C  Acceptance Date shall
be paid by Orion to DACOM on the TT&C  Acceptance  Date.  Orion shall  reimburse
DACOM for  _______________________  of all lease  payments for such land made by
DACOM for periods after the TT&C Acceptance Date and through the end of the Term
of this Agreement,  within 15 days after Orion receives appropriate invoices for
such  Charges.  If and when  requested by Orion,  DACOM shall provide Orion with
evidence of the payment of such amounts by DACOM.

                  (b) Construction Charges. Orion shall reimburse DACOM, subject
to  Section  4.2,  for the  amount  paid by DACOM to third  parties  who are not
Affiliates of DACOM to construct the TT&C Earth Station (which  without  Orion's
consent  shall not exceed  $50,000 USD) pursuant to Article 3, provided that (i)
no such  reimbursement  shall be payable  with  respect to  portions of the TT&C
Earth Station which are not necessary for the installation of the TT&C Equipment
and the Antenna,  as specified in Exhibit H hereto,  and (ii) such reimbursement
shall not exceed the total  amount,  and the amount per  component or portion of
the TT&C Earth Station,  specified in Exhibit H hereto. If and when requested by
Orion,  DACOM shall provide  Orion with such invoices and other  evidence of the
payment of such amounts by DACOM. The  construction  Charges payable by Orion to
DACOM  pursuant to this  Section  9.1(b)  shall be payable  within 15 days after
Orion receives appropriate invoices from DACOM for such charges, but in no event
shall such invoices be payable before the TT&C Acceptance Date.

   
                  (c) Antenna Charges.  Orion shall reimburse DACOM,  subject to
Section  4.2, for the actual  amount paid by DACOM to third  parties who are not
Affiliates of DACOM to purchase,  construct and install the Antenna  pursuant to
Article 3. The payment for the antenna  subsystem  described in Exhibit C1 shall
be a fixed amount at ____________. The payment for the RF/IF equipment and IFLs,
including  shipping,  installation,  testing,  taxes and other levies,  shall be
reimbursed   on   the   actual   cost   basis,   but   it   shall   not   exceed
______________________________________________  ________.  If and when requested
by Orion, DACOM shall provide Orion with such invoices and other evidence of the
payment of such amounts by DACOM.  _______  ___________  of the Antenna  Charges
payable by Orion to DACOM  pursuant to this  Section  9.1(c) shall be payable on
the Antenna  Acceptance  Date.  The remaining  ____  ___________  of the Antenna
Charges payable by Orion to DACOM shall be payable on the TT&C Acceptance Date.
    

                  (d) No  Charge.  All  DACOM  personnel and TT&C services shall
be provided by DACOM to Orion  without  charge,  except as  expressly  set forth
herein.

         9.2.  Payments,  Taxes and Bank  Charges.  All payments due to Orion or
DACOM hereunder  shall be made in United States Dollars by telegraphic  transfer
of immediately  available  funds to a bank account  designated by Orion to DACOM
from time to time,  in the case of payments to Orion,  or by DACOM to Orion from
time to time,  in the case of payments to DACOM,  net of any bank fees,  duties,
taxes  (withholding or otherwise) or similar charges that may be imposed by such
banks or by any  Governmental  Bodies  within Korea or the United  States or any
other nation.

         9.3.  Time of  Payment.  Each  party  shall be deemed to have  received
payment  from  the  other  party  at the time the  payment  is  received  by the
designated  bank of the party to receive such payment.  Each party  acknowledges
and agrees  that any  failure  by it to pay any  amount  due to the other  party
hereunder  within 10 days of receipt of a notice from such other party that such
payment is due shall constitute a material breach of this Agreement.


                                      -10-
<PAGE>



         9.4.  Interest.  If any amount payable by either party hereunder is not
received  when due,  such amount shall bear  interest  until paid at the rate of
eighteen percent (18%) per annum, calculated daily.

                                   ARTICLE 10.

                                TERM; TERMINATION
                                -----------------

         10.1.  Term.  This Agreement  shall be effective as of the date hereof,
and shall  terminate  effective as of the expiration of the Term under the Joint
Investment  Agreement,  except as otherwise  provided in Sections 2.4, 5.3, 7.4,
10.2(a), 10.2(b), 10.2(c) and 10.2(d).

         10.2. Termination. In addition to the termination rights of the parties
specified in Sections 2.4, 5.3 and 7.4:

                  (a) End of Joint Investment Agreement. If and when the Term of
the Joint Investment Agreement ends, Orion or DACOM may terminate this Agreement
at any time thereafter upon at least 6 months notice to the other party,  unless
this Agreement is modified or extended by the parties.

                  (b) Force  Majeure.  If operation of the TT&C Earth Station as
contemplated  by this  Agreement is prevented by Force  Majeure for more than 15
consecutive  days,  either party may terminate  this Agreement at any time after
the end of such  15-day  period  and while  such  Force  Majeure  prevents  such
operation,  upon at  least  30 days  notice  to the  other  party,  unless  this
Agreement is modified or extended by the parties.

                  (c) Breach of  Agreement.  If either party  commits a material
breach of any of the provisions of this  Agreement and such material  breach has
not been cured within thirty days after  receipt by the  breaching  party of the
other party's notice of such breach,  then the non-breaching party may terminate
this  Agreement  upon notice given to the  breaching  party at least ten and not
more than sixty days after the expiration of such thirty-day period, unless this
Agreement is modified or extended by the parties.

                  (d)  Bankruptcy,  etc.  If an Act of  Bankruptcy  occurs  with
respect to either party,  then the other party may terminate this Agreement upon
notice  given to the party which is subject to such Act of  Bankruptcy  at least
ten and not more  than 180  days  after  such  Act of  Bankruptcy,  unless  this
Agreement is modified or extended by the parties.

         10.3.  Payment  of  Charges.  In the event of any  termination  of this
Agreement for any reason  whatsoever  after the TT&C  Acceptance  Date, (i) each
party shall  promptly pay to the other party any Charges or other  amounts which
have accrued to the date of such termination and neither party shall be entitled
to any  refund or credit of any  Charges  theretofore  paid by such party to the
other party.  In the event of any  termination  of this Agreement for any reason
whatsoever  before the TT&C Acceptance Date,  neither party shall be entitled to
receive  any  Charges  after the date of such  termination,  whether or not such
Charges may have accrued before the date of such termination,  and neither party
shall be entitled to any refund or credit for Charges previously paid.

         10.4. Certain Provisions Survive Termination. The provisions of Section
4.5,  Article 9, Section 10.3,  this Section 10.4,  Articles 13 and 14,  Section
15.1 and Article 19 shall survive any  termination  of this  Agreement and shall
not be affected thereby.

                                      -11-

<PAGE>



         10.5.  Option to Purchase or Lease the Site and the TT&C Earth  Station
upon  Termination.  If Orion has purchased the Site and the TT&C Earth  Station,
Orion shall, upon termination of this Agreement,  offer to sell the Site and the
TT&C Earth Station back to DACOM at Fair Market Value (as defined below). If the
Site is leased to Orion, Orion shall, upon termination of this Agreement, permit
DACOM to acquire  the  remaining  lease term and the TT&C Earth  Station at Fair
Market Value.  For purposes of this Section 10.5,  "Fair Market Value" means the
fair market value of the Site and the TT&C Earth  Station as  determined  by the
agreement of Orion and DACOM, or absent such agreement,  the value determined by
the appraisal  process  described below. In the event Orion and DACOM are unable
to agree on the Fair Market Value of the Site and/or the TT&C Earth  Station for
purposes of this Section 10.5, the issue shall be submitted to appraisal  before
a panel of three appraisers.  Orion and DACOM shall each have 15 days to appoint
one  appraiser.  The two  appraisers  appointed by the parties shall appoint the
third  appraiser.  The panel of  appraisers  shall  determine,  by  unanimous or
majority  decision,  the Fair  Market  Value of the Site  and/or  the TT&C Earth
Station. The decision of the appraisers as to Fair Market Value shall be final.

         10.6.  Subsequent  Modification  or  Expansion.  If in  the  reasonable
judgment of Orion changed conditions,  technological  developments or commercial
opportunities  make it desirable  to modify or expand the TT&C Earth  Station in
the  future,  Orion  shall  give  DACOM  at  least  60 days  notice  of  Orion's
determination  to accomplish  such  modification  or expansion.  If such desired
modification or expansion does not involve any significant capital  expenditure,
DACOM shall promptly carry out such requested modification or expansion.  In all
other cases,  DACOM and Orion shall proceed with such  modification or expansion
upon the same basis as the original construction and equipping of the TT&C Earth
Station,  with the same  responsibility  of the  parties  for payment of Charges
relating thereto.


                                   ARTICLE 11.

                                  FORCE MAJEURE
                                  -------------

         Any  failure  or  delay  in the  performance  by  either  party  of its
obligations hereunder shall not be a breach of this Agreement if such failure or
delay is caused by any acts of God, fire, flood, weather,  receive earth station
sun outage or other catastrophes, national emergencies,  insurrections, riots or
wars, strikes, lockouts, work stoppages or other labor difficulties, or any law,
order,  regulation,  direction,  action or request of any government,  or of any
department,  agency, commission, bureau, corporation or other instrumentality of
any  government,  or of any civil or military  authority;  provided that (i) the
party whose  performance is prevented or delayed takes all  reasonable  steps to
avoid or remove such causes of nonperformance and continues performance whenever
and to the extent  that such  causes are  removed  or end.  If Force  Majeure is
claimed by either  party,  such party shall  provide  prompt notice to the other
party of both the  commencement and cessation dates of such Force Majeure event.
The  occurrence of a Force Majeure shall not entitle either party to any refunds
of Charges hereunder or to any other remedy whatsoever, except that both parties
shall  have  the  termination   right  provided  in  Section  10.2(b)  with  the
consequences provided in Section 10.3.

                                      -12-
<PAGE>
                                   ARTICLE 12.

                             GOVERNMENTAL APPROVALS
                             ----------------------

         12.1.  Korean  Government  Approvals.  DACOM shall be  responsible  for
obtaining all authorizations, licenses, permits, consents and other approvals or
governmental  actions,  from  or by  the  Government  of  Korea  and  any  other
Governmental  Body  within  Korea  having  jurisdiction,  which are  required by
Section 2.2 or otherwise  necessary or  appropriate to enable DACOM and Orion to
carry out their respective obligations under this Agreement, to obtain necessary
financing  for the  transactions  contemplated  hereby and to transfer any funds
required  hereunder.  Upon DACOM's request,  and to the extent  feasible,  Orion
shall assist DACOM in obtaining any such governmental  actions. Upon the request
of Orion,  DACOM shall assist Orion in obtaining  the support of any such Korean
Governmental Body to assist in the coordination or consultation of the Satellite
and the frequencies on which the transponders on the Satellite will operate, all
in accordance with ITU regulations and the INTELSAT Treaty.

         12.2.  United States Government  Approvals.  Orion shall be responsible
for  obtaining  all  authorizations,   licenses,  permits,  consents  and  other
approvals  or  governmental  actions , from or by the  Government  of the United
States  and  any  other  Governmental  Body  within  the  United  States  having
jurisdiction,  which are necessary or  appropriate  to enable Orion and DACOM to
carry out their  respective  obligations  under  this  Agreement.  Upon  Orion's
request,  and to the extent  feasible,  DACOM will assist Orion in obtaining any
such  governmental   actions.  Any  consultation  with  INTELSAT  regarding  the
operation of the Satellite  will be the  responsibility  of Orion as Orion deems
appropriate.


                                   ARTICLE 13.

                                      RISK
                                      ----

         13.1. Risk of Loss. All risk of damage, destruction or loss of the TT&C
Earth Station shall be borne by Orion, and DACOM shall have no responsibility or
liability  therefor.   Notwithstanding  the  foregoing,   Orion  shall  have  no
liability, responsibility or obligation hereunder with respect to any damage to,
or destruction or loss of, the Satellite or any  transponder or other  equipment
on the Satellite resulting from any malfunction or failure of the Antenna or the
TT&C  Equipment,  and DACOM's  rights with  respect to any such  malfunction  or
failure shall be governed solely by the Transponder  Agreement.  No such damage,
destruction, loss, malfunction or failure shall entitle either DACOM or Orion to
any refunds of any Charges or any other remedies.

         13.2.  Insurance.  Each party shall be  responsible  for  obtaining and
maintaining  such  insurance  as such party may  choose,  in such  party's  sole
discretion,  to cover such party's insurable interests in the TT&C Earth Station
or the TT&C  Equipment,  and the proceeds of any such insurance shall be payable
to the party  obtaining and  maintaining  it and not to the other party.  At the
request of either party, the other party shall use reasonable  efforts to assist
the requesting party in obtaining any such insurance.  In addition,  DACOM shall
maintain  insurance  coverage in the amount of Two Million United States Dollars
(2,000,000  USD),  or other sums as  mutually  agreed,  with  respect to loss or
damage to the TT&C Earth Station, the Antenna or the TT&C Equipment caused by or
resulting from the negligence of DACOM's employees or agents.



                                      -13-
<PAGE>
                                  ARTICLE 14.

                            INDEMNIFICATION; DAMAGES
                            ------------------------

         14.1.  Indemnification.  Each party shall  indemnify and hold the other
party,  and  such  other  party's  shareholders,  officers,  directors,  agents,
employees and assigns,  or any of them,  whether acting through such other party
or  otherwise,  harmless  from  and  against  any and all  claims,  liabilities,
expenses,  assessments,  judgments and recoveries,  including  attorneys'  fees,
incurred by any of them and  occasioned by, arising out of or resulting from any
material  misrepresentation,  breach of  warranty  or  covenant,  or  default or
nonfulfillment  of any terms and  conditions,  on the part of such  indemnifying
party under this Agreement.

         14.2.  Consequential  Damages. In no event shall either party be liable
for any indirect,  incidental or consequential  damages,  whether foreseeable or
not, occasioned by any cause whatsoever;  except that DACOM's indemnification of
Orion pursuant to Section 14.1 shall cover damages suffered by Orion,  including
loss of rentals, purchase price, income or profits, arising out of any damage to
or loss of the Satellite or any  transponders or other equipment  thereon or any
interruption of the Satellite's ability to transmit  programming pursuant to the
various  agreements  between Orion and users of the Satellite or transponders or
other equipment thereon.

         14.3.  Procedure  for  Indemnification.  In the  event of a claim  with
respect to which a party is entitled to  indemnification  hereunder,  such party
("Indemnified  Party")  shall notify the other party  ("Indemnifying  Party") in
writing as soon as practicable, but in no event later than 15 days after receipt
of such claim;  provided  that a delay in giving such notice  shall not preclude
the Indemnified Party from seeking  indemnification  hereunder if such delay has
not materially prejudiced the Indemnifying Party's ability to defend such claim.
The  Indemnifying  Party shall promptly defend such claim (by counsel of its own
choosing  and  reasonably   satisfactory  to  the  Indemnified  Party)  and  the
Indemnified Party shall reasonably  cooperate with the Indemnifying Party in the
defense  of such  claim,  including  the  settlement  of the matter on the basis
stipulated  by  the  Indemnifying  Party  (with  the  Indemnifying  Party  being
responsible  for all costs and expenses of such  settlement  and the  reasonable
out-of-pocket expenses incurred by the Indemnified Party in cooperating with the
Indemnifying  Party),  subject to the  limitations  on  settlement  described in
subparagraphs  (a) and (b) below. If a conflict of interest exists vis-a-vis the
interests of the Indemnifying  Party and the Indemnified  Party, the Indemnified
Party shall (i) be entitled to defend the claim,  suit,  or action or proceeding
at the expense of, for the account of and at the risk of the Indemnifying Party;
(ii)  engage  counsel  of  its  own  choosing   reasonably   acceptable  to  the
Indemnifying Party, and at the expense of, for the account of and at the risk of
the Indemnifying  Party;  and (if the actions  specified in clauses (i) and (ii)
above are taken,  then (iii) take  reasonable  steps to monitor  and control the
fees and  costs of  counsel  so  chosen;  and (iv) keep the  Indemnifying  Party
reasonably informed of the status of such defense,  including without limitation
any settlement  proposals by the claimant.  If the Indemnifying  Party, within a
reasonable time after notice of a claim,  fails to defend the Indemnified Party,
the Indemnified Party shall be entitled to undertake the defense,  compromise or
settlement  of such claim at the  expense of, for the account and at the risk of
Indemnifying Party. Upon the assumption by the Indemnifying Party of the defense
of such claim, the Indemnifying  Party may settle or compromise such claim as it
sees fit; provided,  however, that anything in this Section 14.3 to the contrary
notwithstanding:


                                      -14-
<PAGE>



                  (a)  Consent.  If there  is a  reasonable  probability  that a
settlement  or  compromise of a claim may  materially  and adversely  affect the
Indemnified Party, the Indemnifying Party shall not so settle or compromise such
claim without the consent of the Indemnified  Party,  which consent shall not be
unreasonably withheld; and

                  (b) Counterclaim.  If the facts giving rise to indemnification
hereunder  shall  involve a possible  claim by the  Indemnified  Party against a
third party,  the  Indemnified  Party shall have the right,  at its own cost and
expense, to undertake the prosecution, compromise, and settlement of such claim.

                                   ARTICLE 15.

                                 CONFIDENTIALITY
                                 ---------------

         15.1.  Confidentiality.  Each party shall treat as confidential  all of
the  Confidential  Information,  refrain  from  using  any of  the  Confidential
Information  except in connection with this Agreement,  and deliver  promptly to
the other party or  destroy,  at the request of the other  party,  all  tangible
embodiments, including all copies thereof, of the Confidential Information which
are within the possession or control of such party. If either party is requested
or required  (by oral  question or request for  information  or documents in any
legal proceeding, interrogatory, subpoena, civil investigative demand or similar
process) to disclose any Confidential  Information,  such party shall notify the
other party  promptly of such request or requirement so that the other party may
seek an appropriate  protective order or waive compliance with the provisions of
this  Section  15.1.  If, in the absence of such a  protective  order or waiver,
either  party  is,  on  the  advice  of  counsel,   compelled  to  disclose  any
Confidential  Information  to any tribunal or else be liable for contempt,  such
party may disclose such  Confidential  Information to such  tribunal;  provided,
however,  that the  disclosing  party  shall use such  party's  best  efforts to
obtain,  at the  request  and  expense  of the  other  party,  an order or other
assurance  that  confidential  treatment will be accorded to such portion of the
Confidential  Information  required  to be  disclosed  as the other  party shall
designate. For purposes of this Section 15.1,  "Confidential  Information" means
any information concerning the Site or the TT&C Earth Station, the operations of
the TT&C Earth Station, the Satellite and its components, the TT&C Equipment, or
the business and affairs of DACOM or Orion or their respective Affiliates,  that
is not already  generally  available to the public.  The parties  recognize that
Orion's filing of this Agreement, including the Exhibits hereto, with the United
States  Securities  and Exchange  Commission may be required by law. Such filing
shall not be subject to or a violation of this Section 15.1.

         15.2.  Confidentiality  Agreements. At the request of Orion to DACOM at
any time during the Term of this  Agreement,  DACOM  shall  cause any  employee,
agent,  consultant  or  independent  contractor  of DACOM who may have access to
Confidential  Information  to execute  and  deliver  to Orion a  confidentiality
agreement  in  substantially  the form of  Exhibit G hereto,  with such  changes
therein  as Orion  and DACOM may  agree in light of  changes  in  circumstances,
technology and the like. If any such employee,  agent, consultant or independent
contractor  refuses to execute and  deliver  such a  confidentiality  agreement,
DACOM  shall  take such  steps as may be  necessary  or  appropriate,  including
denying such person access to the Site, so that such person will not have access
to any Confidential Information.



                                      -15-
<PAGE>
                                   ARTICLE 16.

                                   ASSIGNMENT
                                   ----------

         16.1.  Succession and Assignment.  This Agreement shall be binding upon
and inure to the benefit of DACOM and Orion and their respective  successors and
permitted  assigns.  Neither  party may  assign  this  Agreement  or any of such
party's rights, interests or obligations hereunder without the prior approval of
the other party hereto, except as follows:

                  (a)  Orion  may  (i)  assign  any or all  of  its  rights  and
interests  hereunder  to one or more of its  Affiliates  or to a lender or other
person providing financing to Orion or such Affiliate, and (ii) designate one or
more of its Affiliates to perform its obligations hereunder;  except that in any
event Orion  shall  remain  responsible  for the  performance,  by itself or its
assignee, of all of its obligations hereunder; and

                  (b) Orion may assign and convey to any other person any or all
of its title to or rights and interests in the TT&C Equipment,  or impose a Lien
on any or all of the TT&C  Equipment,  so long as the  assignee  agrees that the
TT&C  Equipment  shall  remain  at the  Site and be  subject  to use by DACOM in
accordance with this Agreement.

         16.2. Change of Control. In the event of any merger or sale of stock or
assets of DACOM  resulting  in a change of control of DACOM,  DACOM will provide
assurance that the quality of service at the TT&C Station will be maintained.


                                   ARTICLE 17.

                     REPRESENTATIONS AND WARRANTIES OF ORION
                     ---------------------------------------

         17.1. Representations and Warranties.  Orion represents and warrants to
DACOM as follows:

                  (a)  Incorporation,  Power,  etc. Orion is a corporation  duly
organized,  validly existing and in good standing under the laws of the State of
Delaware,  U.S.A.,  with all  necessary  corporate  power to own and  lease  its
properties  and to carry on its  business as and where such  properties  are now
owned or leased and such business is now being carried on;

                  (b) Due  Authorization  of  Agreement;  No Conflict With Other
Instruments.  Orion has full  power and  authority  and has taken all  necessary
action to execute,  deliver and consummate this Agreement and to perform all the
terms and conditions  hereof to be performed by Orion. This Agreement is a valid
and binding obligation of Orion enforceable against Orion in accordance with its
terms,  except  as the  enforceability  hereof  may be  limited  by  bankruptcy,
insolvency  or other laws of general  application  relating to or affecting  the
enforcement of creditors' rights or by general principles of equity limiting the
availability of equitable remedies.  The execution and delivery by Orion of this
Agreement,  the consummation by Orion of the  transactions  which this Agreement
contemplates  will be  consummated  by Orion,  and  Orion's  fulfillment  of and
compliance with the terms and provisions  hereof applicable to Orion, do not and
will not (i) violate any law applicable to Orion, or (ii) conflict with,  result
in a breach of or constitute a default under Orion's  articles of  incorporation
or bylaws.


                                      -16-
<PAGE>



         17.2.  Exclusion  of  Warranties.  ORION  MAKES NO  REPRESENTATIONS  OR
WARRANTIES OF ANY KIND OR NATURE WHATSOEVER,  WHETHER EXPRESS OR IMPLIED,  AS TO
THE CONDITION OF THE TT&C EQUIPMENT,  THE ANTENNA OR THE TT&C EARTH STATION,  OR
AS TO THEIR  SUITABILITY  FOR THEIR INTENDED USE. ALL SUCH WARRANTIES ARE HEREBY
EXPRESSLY  DISCLAIMED.  DACOM  ACKNOWLEDGES  THAT ORION MAKES NO WARRANTY OF ANY
KIND, AND IN PARTICULAR THAT THERE IS NO IMPLIED WARRANTY OF  MERCHANTABILITY OR
FITNESS FOR ANY  PARTICULAR  PURPOSE  ASSOCIATED  WITH THE TT&C  EQUIPMENT,  THE
ANTENNA OR THE TT&C EARTH STATION.

                                   ARTICLE 18.

                     REPRESENTATIONS AND WARRANTIES OF DACOM
                     ---------------------------------------

         DACOM represents and warrants to Orion as follows:

         18.1. Incorporation, Power, etc. DACOM is a corporation duly organized,
validly  existing  and in good  standing  under  the  laws of  Korea,  with  all
necessary  corporate  power to own and lease its  properties and to carry on its
business as and where such  properties are now owned or leased and such business
is now being carried on.

         18.2.  Due   Authorization   of  Agreement;   No  Conflict  With  Other
Instruments.  DACOM has full  power and  authority  and has taken all  necessary
action to execute,  deliver and consummate this Agreement and to perform all the
terms and conditions  hereof to be performed by DACOM. This Agreement is a valid
and binding obligation of DACOM enforceable against DACOM in accordance with its
terms,  except  as the  enforceability  hereof  may be  limited  by  bankruptcy,
insolvency  or other laws of general  application  relating to or affecting  the
enforcement of creditors' rights or by general principles of equity limiting the
availability of equitable remedies.  The execution and delivery by DACOM of this
Agreement,  the consummation by DACOM of the  transactions  which this Agreement
contemplates  will be  consummated  by DACOM,  and  DACOM's  fulfillment  of and
compliance with the terms and provisions  hereof applicable to DACOM, do not and
will not (i) violate any law applicable to DACOM, or (ii) conflict with,  result
in a breach of or constitute a default under the instruments and documents under
which DACOM is organized and by which DACOM is governed.

         18.3.  Government   Regulation.   The  terms  and  conditions  of  this
Agreement,  including  the  payments  provided  for  herein,  are not subject to
regulation or review by or consent from any Governmental  Body in Korea to which
DACOM  is  subject.  No  such  Governmental  Body  can  require  the  amendment,
modification  or  supplementation  of this  Agreement  without the prior written
consent of Orion.


         18.4.  Exclusion  of  Warranties.  DACOM  MAKES NO  REPRESENTATIONS  OR
WARRANTIES OF ANY KIND OR NATURE WHATSOEVER,  WHETHER EXPRESS OR IMPLIED,  AS TO
THE CONDITION OF THE TT&C EQUIPMENT,  THE ANTENNA OR THE TT&C EARTH STATION,  OR
AS TO THEIR  SUITABILITY  FOR THEIR INTENDED USE. ALL SUCH WARRANTIES ARE HEREBY
EXPRESSLY  DISCLAIMED.  ORION  ACKNOWLEDGES  THAT DACOM MAKES NO WARRANTY OF ANY
KIND, AND IN PARTICULAR THAT THERE IS NO IMPLIED WARRANTY OF  MERCHANTABILITY OR
FITNESS FOR ANY  PARTICULAR  PURPOSE  ASSOCIATED  WITH THE TT&C  EQUIPMENT,  THE
ANTENNA OR THE TT&C EARTH STATION.


                                      -17-
<PAGE>



                                   ARTICLE 19.

                                  MISCELLANEOUS
                                  -------------

         19.1.  Further  Assurances.  DACOM and Orion shall take all appropriate
action and execute all  documents,  instruments or conveyances of any kind which
may be necessary or advisable to carry out any of the  provisions  hereof and to
consummate the transactions contemplated hereby

         19.2.  Taxes and  Expenses.  Each party hereto shall bear all taxes and
expenses incurred by such party in connection with the negotiation, preparation,
execution and  performance of this  Agreement,  except as otherwise  provided in
Sections 4.2, 9.1(d), 9.2 and Article 12.

         19.3.  Press  Releases  and Public  Announcements.  Except as otherwise
required by law or by applicable rules of any securities exchange or association
of securities  dealers,  neither party shall issue any press  release,  make any
public  announcement  or otherwise  disclose any  information for the purpose of
publication  by any print,  broadcast  or other  public  media,  relating to the
transactions  contemplated by this Agreement,  without the prior approval of the
other party.

         19.4. Notices. All notices,  demands, claims,  requests,  undertakings,
consents,  opinions  and other  communications  which may or are  required to be
given  hereunder or with respect hereto shall be in writing,  and in the English
language,  shall  be  given  either  by  personal  delivery  or  by  established
international courier, charges prepaid, or by facsimile transmission,  and shall
be deemed to have been given or made when personally  delivered,  when delivered
to the courier  company,  charges  prepaid,  and when  transmitted by facsimile,
addressed to the respective parties as follows:

                  (a)      If to Orion:

                           Orion Asia Pacific Corp.
                           2440 Research Boulevard
                           Rockville, Maryland 20850
                           Attention:  Corporate Secretary
                           Fax:  301-258-3360

                           With a copy to:

                           Orion Asia Pacific Corp.
                           2440 Research Boulevard
                           Rockville, Maryland 20850
                           Attention:  Vice President, Engineering
                           Fax:  301-258-3319

                           With copy to:

                           Reed Smith Shaw & McClay
                           1301 K Street, N.W.
                           Washington, D.C. 20005
                           Attention:  Benjamin J. Griffin, Esq.
                           Fax:  202-414-9299


                                      -18-
<PAGE>



or to such other  address as Orion may from time to time  designate by notice to
DACOM with respect to future notices, demands and other communications to Orion;
or

                  (b)      If to DACOM:

                           DACOM Corp.
                           DACOM Building 65-228
                           3-GA, Hangang-Ro, Yongsan-Ku
                           Seoul, Korea
                           Attention:  Youn Woo Lee
                           Head of Satellite Communications Business Team
                           Fax:  82-2-220-0761

                           With copy to:

                           Bae, Kim & Lee
                           Shin-A Bldg, 39-1 Seosomun-Dong
                           Chung-Ku, Seoul, 100-752
                           Korea
                           Attention:  Suk Jin Chon, Esq.
                           Fax:  82-2-755-7676

or to such other  address as DACOM may from time to time  designate by notice to
Orion with respect to future notices, demands and other communications to DACOM.

         19.5. No Third-Party Beneficiaries. This Agreement shall not confer any
rights or remedies upon any person other than the parties to this  Agreement and
their  respective  successors  and permitted  assigns,  and shall not create the
relationship  of  principal  and  agent,  partnership  or joint  venture  or any
fiduciary relationship between DACOM and Orion.

         19.6.    Governing Law; Arbitration.

                  (a)  Governing  Law. This  Agreement  shall be governed by and
construed in accordance with the laws of the State of New York, U.S.A.,  without
giving effect to any choice or conflict of law provision or rule (whether of the
State of New York or any other jurisdiction) that would cause the application of
the laws of any jurisdiction other than the State of New York.

                  (b)  Arbitration.  All disputes,  controversies or differences
which may arise between the Parties, out of, or in relation to, or in connection
with this  Agreement,  or for the breach  thereof,  shall be finally  settled by
arbitration  in  Vancouver,   Canada,  in  accordance  with  the  rules  of  the
International  Chamber of Commerce.  The award rendered by the three arbitrators
shall be final and binding upon both Parties concerned.

         19.7.  Amendments  and Waivers.  No amendment of any  provision of this
Agreement,  and no  postponement  or  waiver  of any  such  provision  or of any
default, misrepresentation, or breach of warranty or covenant hereunder, whether
intentional or not, shall be valid unless such amendment, postponement or waiver
is in writing and signed by or on behalf of Orion and DACOM.  No such amendment,
postponement  or waiver  shall be  deemed  to extend to any prior or  subsequent
matter,  whether  or  not  similar  to the  subject-matter  of  such  amendment,
postponement  or  waiver.  No  failure or delay on the part of Orion or DACOM in
exercising any right, power or privilege under

                                      -19-
<PAGE>



this Agreement shall operate as a waiver thereof nor shall any single or partial
exercise  of any  right,  power or  privilege  hereunder  preclude  any other or
further exercise thereof or the exercise of any other right, power or privilege.

         19.8.    Matters of Construction, Interpretation and the Like.

                  (a) Construction. Orion and DACOM have participated jointly in
the negotiation  and drafting of this Agreement.  If an ambiguity or question of
intent or interpretation arises, this Agreement shall be construed as if drafted
jointly  by both  parties  and no  presumption  or burden of proof  shall  arise
favoring or  disfavoring  either party  because of the  authorship of any of the
provisions of this  Agreement.  Any reference to any law shall be deemed also to
refer to all  rules,  regulations,  orders or  decrees  promulgated  thereunder,
unless the context requires otherwise. The word "including" shall mean including
without limitation. Each representation,  warranty and covenant contained herein
shall have independent significance. If either party breaches in any respect any
representation,  warranty,  covenant  or other  obligation  contained  herein or
created  hereby,  the fact that there exists  another  representation,  warranty
covenant or obligation  relating to the same subject  matter  (regardless of the
relative  levels of  specificity)  which has not been breached shall not detract
from or  mitigate  the  consequences  of such  breach.  The rights and  remedies
expressly  specified in this  Agreement are  cumulative and are not exclusive of
any rights or  remedies  which any party  would  otherwise  have.  The  Exhibits
specified in this Agreement are incorporated herein by reference and made a part
hereof.  The article and section  headings hereof are for  convenience  only and
shall  not  affect  the  meaning  or  interpretation  of  this  Agreement.   All
representations  and warranties in this Agreement shall survive for the duration
of the Term. The English language version of this Agreement is controlling.

                  (b) Severability. The invalidity or unenforceability of one or
more of the  provisions of this  Agreement in any situation in any  jurisdiction
shall not affect the validity or enforceability of any other provision hereof or
the validity or enforceability of the offending provision in any other situation
or jurisdiction.

                  (c) Entire  Agreement;  Counterparts.  This Agreement (and the
other documents referred to herein) constitutes the entire agreement between the
parties and supersedes any prior  understandings,  agreements or representations
by or among the  parties,  written  or oral,  to the extent  they  relate to the
subject  matter  hereof.   This  Agreement  may  be  executed  in  one  or  more
counterparts,  each of  which  shall  be  deemed  an  original  but all of which
together shall constitute one and the same instrument. It shall not be necessary
in making  proof of this  Agreement to produce or account for more than one such
counterpart.


                                   ARTICLE 20.

                                   DEFINITIONS
                                   -----------

         As used in this Agreement,  unless the context otherwise requires,  the
following terms shall have the following meanings:

                  "Act of Bankruptcy" means the institution of any proceeding by
one of the parties or by a third person  seeking to have such party  declared or
found to be insolvent or seeking  dissolution,  liquidation,  reorganization  or
similar relief with respect

                                      -20-
<PAGE>



 to such party or such party's assets, or seeking  appointment of a receiver,  a
trustee  or other  custodian  for  such  party or such  party's  assets,  or the
voluntary  cessation or suspension of the business of such party, or any similar
relief or event, under any law relating to bankruptcy,  insolvency or protection
of creditors,  unless such party contests such proceeding and such proceeding is
dismissed within 30 days.

                  "Affiliate,"  with respect to either  party,  means any entity
that  directly or indirectly  through one or more  intermediaries  controls,  is
controlled by, or is under common control with, such party.

                  "Agreement"  means this  Agreement as originally  executed and
delivered or, if amended or supplemented, as so amended or supplemented.

                  "Antenna"  means the antenna to be purchased,  constructed and
installed by DACOM  pursuant to Section 3.2, and for purposes of this  Agreement
shall include HPA's,  LNAs, switch gear, IFL's and up and down converters to the
IF Patch Panel.

                  "Antenna Acceptance Date" has the meaning set forth in Section
5.2.

                  "Charge" means the various amounts payable pursuant to Section
9.1.

                  "Confidential  Information"  has  the  meaning  set  forth  in
Section 15.1.

                  "Construction   Specifications"   means   the   specifications
referred to in Section 3.1 and attached hereto as Exhibit B.

                  "CSM Operations" means the operation of communications  system
monitoring equipment.

                  "DACOM" means DACOM Corp., a Korean corporation.

                  "Fair Market Value" has the meaning set forth in Section 10.5.

                  "Force  Majeure"  means  one or more of the  events  or causes
referred to in Article 11.

                  "Governmental  Body"  means any  national,  state,  provincial
county, city,  municipal,  regional or local organ of government,  including all
courts, boards and agencies of any thereof.

                  "Joint  Investment   Agreement"  means  the  Joint  Investment
Agreement of even date herewith between Orion and DACOM.

                  "Korea" means the Republic of Korea.

                  "Law,"  whether or not  capitalized,  means  statutes,  rules,
regulations,  codes, plans, injunctions,  judgments, orders, decrees and rulings
of any Governmental Body.

                                      -21-
<PAGE>


                  "Lien" means any encumbrance,  including any mortgage, deed of
trust,  pledge,  hypothecation,  assignment,  statutory or other lien,  security
interest  or other  security  arrangement,  conditional  sale,  title  retention
agreement,  financing lease and the filing of any financing statement or similar
instrument  under the Uniform  Commercial Code of any state in the United States
or comparable law of any other jurisdiction.

                 "Orion" means Orion Asia Pacific Corp., a Delaware corporation.

                  "Orion 3" has the meaning set forth in the recitals hereto.

                  "Permitted Liens" means (i) Liens and charges for then current
taxes,  levies or  assessments  not then due and payable or which remain payable
without interest or penalty, (ii) easements, rights of way, title exceptions and
reservations,  restrictions,  zoning ordinances and other  encumbrances which do
not adversely  affect the use of the properties  subject thereto for the purpose
contemplated  by this  Agreement,  (iii)  obligations  and duties of DACOM,  not
interfering  with the use of the  properties  subject  thereto  for the  purpose
contemplated by this  Agreement,  and (iv) such other Liens as Orion may approve
in Orion's sole discretion.

                  "Person,"  whether or not  capitalized,  means an  individual,
corporation,    partnership,   limited   liability   company   or   partnership,
unincorporated organization,  voluntary association, joint stock company, trust,
joint venture or Governmental Body.

                  "Satellite"  means Orion 3 and any  Replacement  Satellite  or
Successor Satellite, as those terms are defined in the Transponder Agreement.

                  "TT&C Earth  Station"  means the  facilities to be constructed
and operated on the Site pursuant to this Agreement.


                                      -22-
<PAGE>





                  "Site" means the location for the TT&C Earth Station  selected
as provided in Section 2.1.

   
                  "Joint  Investment   Agreement"  means  the  Joint  Investment
Agreement  dated as of November 11, 1996 between DACOM and Orion,  as originally
executed  and  delivered  or, if  amended  or  supplemented,  as so  amended  or
supplemented.
    

                  "Term" means the period of time during which this Agreement is
in effect as provided in Section 10.1.

                  "TT&C" has the meaning set forth in Section 1.1.

                  "TT&C  Acceptance  Date" has the  meaning set forth in Section
5.3.

                  "TT&C Equipment" has the meaning set forth in Section 4.1.


                  WITNESS the due execution  hereof as of the day and year first
above written.

<TABLE>
<CAPTION>

<S>                                          <C>
ORION ASIA PACIFIC CORP.                      DACOM CORP.



By:                                           By:
     ---------------------------------             --------------------------------
     W. Neil Bauer                                  Kwak, Chi-Young
     Chief Executive Officer                        Senior Executive Vice President


Date:                                         Date:

     ---------------------------------             ---------------------------

                                      -23-
</TABLE>
<PAGE>




                                    EXHIBIT A




                                              Confidential Treatment has been
                                              requested for this entire exhibit.


                            FUNCTIONS TO BE PERFORMED

                            BY THE TT&C EARTH STATION



<PAGE>




                                    EXHIBIT B




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                           CONSTRUCTION SPECIFICATIONS

                           FOR THE TT&C EARTH STATION



<PAGE>




   
                                   EXHIBIT C1
    




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                             ANTENNA SPECIFICATIONS



<PAGE>




   
                                   EXHIBIT C2
    




                                               Confidential Treatment has been
                                              requested for this entire exhibit.



   
                  RF/IF REQUIREMENTS INCLUDING TEST TRANSLATOR
    





<PAGE>




                                    EXHIBIT D




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                                 TT&C EQUIPMENT



<PAGE>




                                    EXHIBIT E




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                                     TESTING



<PAGE>




                                    EXHIBIT F




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                           INITIAL JOB SPECIFICATIONS,

                               NUMBER OF PERSONNEL

                               AND QUALIFICATIONS



<PAGE>




                                    EXHIBIT G

                        FORM OF CONFIDENTIALITY AGREEMENT

                            NON-DISCLOSURE AGREEMENT



      This Agreement is between Orion Network  systems,  inc.,  Orion  satellite
Corporation   and  OrionNet  Inc.,  each  Delaware   Corporations,   hereinafter
collectively  referred  to  as  "ONS",  and   _________________________________,
hereinafter referred to as "Recipient".  Recipient will provide certain services
to  Orion  Network  Systems,  Inc.,  or  one of its  subsidiaries,  i.e.,  Orion
Satellite Corporation,  OrionNet Inc., and Orion Asia Pacific Corp. As a result,
Recipient  will  receive  and  have  access  to  certain  information  which  is
confidential  and proprietary to ONS. ONS desires to protect all its proprietary
and confidential  information and, toward that end,  Recipient hereby agrees and
represents as follows:

      1.  Proprietary and  Confidential  Information:  Recipient agrees that any
information  which is provided by ONS is subject to the terms of this Agreement.
Recipient agrees that all information which he receives from ONS shall be deemed
confidential,  proprietary  and  secret  whether  or not  any  such  information
received is in tangible form or is clearly marked as confidential or proprietary
or whether Recipient is expressly informed that such information is confidential
and  proprietary.  Information  which is  received  orally  shall also be deemed
confidential or proprietary.

      2.  Nondisclosure  to  Third  Parties:  The  Recipient  shall  treat  such
information received from ONS as the proprietary and confidential information of
ONS and shall not  disclose  said  Information  to any  other  person  except as
specifically  authorized in writing by ONS, and shall safeguard such Information
as he would his own  proprietary  and  confidential  information.  The Recipient
shall  immediately  notify the  disclosing  party of any subpoena,  court order,
administrative  order,  discovery request,  or other event that could compel the
recipient to disclose such  Information.  The Recipient shall cooperate with ONS
in its efforts to protect the Information from disclosure.


      3. Ownership and Use of Information:  All written or oral data received by
Recipient from ONS for purposes of performing  his consulting  services shall be
and remain the property of ONS.  Recipient shall not make copies of any tangible
data or printed  information  except upon specific written  permission from ONS.
Any  tangible  data or printed  information,  and any copies  thereof,  shall be
promptly  destroyed or returned  immediately to ONS upon the request of ONS. The
Recipient shall not use the information received from ONS for any purpose except
to perform the specific consulting services requested.


                                      G-1

<PAGE>

      4. Term of Agreement:  The obligations under this Agreement shall continue
and survive the completion of the aforesaid consulting services and shall remain
binding  for a period  of five (5)  years  from  the date of  execution  of this
Agreement.


      5.  Employee  Access  and  Control of  Information:  The  Recipient  shall
maintain a list of the names of its employees or  associates  who have access to
the  information  and shall  furnish  such list to ONS upon  request.  Each such
employee  or  associate  shall be  deemed a  Recipient  and shall  execute  this
Non-Disclosure Agreement prior to receiving such information.


      6.  Unauthorized  Access to  Information:  If the  Recipient has reason to
believe any  information  under his control and  provided to him by ONS has been
accessed by unauthorized  individuals,  he shall immediately report the incident
fully to ONS.


      7.  Exceptions:  The obligations  contained herein shall not apply to: (a)
Information not public which hereafter is disclosed publicly without a breach of
this  Agreement;  (b)  Information  known to the recipient  prior to the time of
disclosure by the disclosing  party or  independently  developed by employees of
the recipient without access to the Information; or (c) Information disclosed in
good faith to the recipient by a third person legally entitled to disclose it.


      8.  Miscellaneous:  The obligations of the parties shall be binding on and
inure to the benefit of their respective heirs,  successors,  and assigns.  This
Agreement may be amended or modified only by a subsequent  agreement in writing.
This Agreement does not obligate either party to disclose any information to the
other or enter into any other agreement or arrangement. The parties' obligations
under  this  Agreement  shall  survive  the  termination  of  their  association
regardless of the manner of such  termination.  This Agreement shall be governed
by the laws of the State of Maryland.

I  agree  to  the  foregoing   terms  and   conditions   this  ________  day  of
________________, 1996.



Orion Network Systems, Inc.                            _________________________
                                                            Recipient



__________________________                             _________________________
Signature                                              Signature



__________________________                             _________________________
Print Name                                             Print Name



__________________________                             _________________________
Title                                                  Title

                                       G-2


<PAGE>




                                    EXHIBIT H




                                              Confidential Treatment has been
                                              requested for this entire exhibit.



                              CONSTRUCTION CHARGES




<PAGE>
The portions of this Exhibit for which confidential treatment has been requested
are marked by brackets ([ ]). In addition,  an asterisk (*) appears in the right
hand margin of each  paragraph in which  confidential  information  is included.

                           JOINT INVESTMENT AGREEMENT
                                     BETWEEN
                            ORION ASIA PACIFIC CORP.
                                       AND
                                   DACOM CORP.
                            DATED: NOVEMBER 11, 1996





<PAGE>
                                TABLE OF CONTENTS



                                                                           PAGE
                                                                         -------
ARTICLE 1. DEFINITIONS ..................................................   1

ARTICLE 2. ACQUISITION OF TRANSPONDER CAPACITY ..........................   4
  2.1. Transponders .....................................................   4
  2.2. Spare Transponders ...............................................   4
  2.3. Launch Failure or Transponder Failure;Replacement Satellite ......   4
  2.4. Successor Satellite ..............................................   4

ARTICLE 3. TESTING ......................................................   5
  3.1. Ground Testing ...................................................   5
  3.2. In-Orbit Testing .................................................   6
  3.3. Conclusion of Tests ..............................................   6
  3.4. Accommodation of DACOM Personnel .................................   6
  3.5. Qualifications of DACOM Personnel ................................   7
  3.6. Schedule .........................................................   7

ARTICLE 4. TERM .........................................................   7
  4.1. Initial Term .....................................................   7
  4.2. Orion's Right at End of Term .....................................   7

ARTICLE 5. PAYMENTS .....................................................   7
  5.1. Joint Investment Amount ..........................................   7
  5.2. Payment Schedule .................................................   7
  5.3. Notice of Payment, Payments, Taxes and Bank Charges ..............   8
  5.4. Time of Payment ..................................................   8
  5.5. Late Payment Penalty Interest ....................................   8
  5.6. Security .........................................................   8
  5.7. Adjustment .......................................................   9

ARTICLE 6. TRANSPONDER FAILURE AND RESTORATION; OTHER FAILURE  ..........   9
  6.1. Spare Transponders; Transponder Failure; Restoration .............   9
  6.2. Risk of Transponder Failure ......................................  10
  6.3. In-Orbit Insurance ...............................................  10

ARTICLE 7. TRACKING, TELEMETRY AND COMMAND ..............................  10

ARTICLE 8. CONTRACT PARTICIPATION RIGHTS; REPORTS AND COMMUNICATIONS  ...  11

                                       -i-


<PAGE>
                                                                          PAGE
                                                                         -------
  8.1. Participation in Satellite Construction Monitoring ...............  11

  8.2. Schedule/Progress Reports/Meetings ...............................  11
  8.3. Operational Reports and Communications ...........................  11
  8.4. Anomalous Operation Notification .................................  12

ARTICLE 9. USE OF TRANSPONDERS/ORION 3 SATELLITE ........................  12
  9.1. Use of and Right to Transponders .................................  12
  9.2. Technical Responsibilities of DACOM ..............................  12
  9.3. Interruption Rights in Abnormal Circumstances ....................  13
  9.4. Orion's Rights to Satellite ......................................  13
  9.5. Reactivation .....................................................  13
  9.6. Regional Beam Transponders .......................................  14

ARTICLE 10. TERMINATION .................................................  14
  10.1. Termination by DACOM ............................................  14
  10.2. Termination by Orion ............................................  15
  10.3. Consequences of Termination .....................................  15
  10.4. Retirement of Orion 3 ...........................................  16
  10.5. Launch Failure/Salvage ..........................................  17

ARTICLE 11. REPRESENTATIONS AND WARRANTIES OF ORION .....................  17
  11.1. Representations and Warranties ..................................  17
  11.2. Exclusion of Warranties .........................................  18
  11.3. Manufacturer Reimbursement ......................................  18

ARTICLE 12. REPRESENTATIONS AND WARRANTIES OF DACOM .....................  18
  12.1. Incorporation, Power, etc .......................................  18
  12.2. Due Authorization of Agreement; No Conflict With Other
  Instruments ...........................................................  18
  12.3. Government Regulation ...........................................  19

ARTICLE 13. COORDINATION; GOVERNMENT APPROVALS ..........................  19
  13.1. Coordination ....................................................  19
  13.2. Government Approvals ............................................  19

ARTICLE 14. LIMITATION OF LIABILITY AND INDEMNIFICATION .................  20
  14.1. Force Majeure ...................................................  20
  14.2. Consequential Damages ...........................................  20
  14.3. Remedies ........................................................  20

                                      -ii-




<PAGE>
                                                                           PAGE
                                                                         -------
ARTICLE 15. INDEMNIFICATION .............................................  20
  15.1. Indemnification by DACOM ........................................  20
  15.2. Indemnification by Orion ........................................  20
  15.3. Procedure for Indemnification ...................................  21

ARTICLE 16. MISCELLANEOUS ...............................................  21
  16.1. Further Assurances ..............................................  21
  16.2. Taxes and Expenses ..............................................  22
  16.3. Press Releases and Public Announcements .........................  22
  16.4. Notices..........................................................  22
  16.5. No Third-Party Beneficiaries ....................................  23
  16.6. Governing Law; Arbitration ......................................  23
  16.7. Amendments and Waivers ..........................................  23
  16.8. Succession and Assignment .......................................  24
  16.9. Confidentiality .................................................  24
 16.10. Matters of Construction, Interpretation and the Like ............  25
 16.11. Compliance ......................................................  26
 16.12. Registration ....................................................  26


EXHIBITS

A ORION ACCESS PROCEDURES
B TRANSPONDER PERFORMANCE SPECIFICATIONS
C FORM LETTER OF CREDIT
D OPERATIONAL REPORT ELEMENTS
E LETTER RE ORION WARRANT

                                      -iii-

<PAGE>

                           JOINT INVESTMENT AGREEMENT


         This JOINT  INVESTMENT  AGREEMENT,  dated as of November 11, 1996 (this
"Agreement"),  by and between ORION ASIA PACIFIC CORP., a corporation  organized
and existing under the laws of Delaware,  U.S.A.  ("Orion"),  and DACOM CORP., a
corporation  organized  and  existing  under the laws of the  Republic  of Korea
("DACOM"),

                              W I T N E S S E T H:

         WHEREAS,   Orion  intends  to  procure  and  operate  a  communications
satellite  to be  known  as Orion 3, to be  launched  into an  orbital  location
currently projected to be at 139 degrees East Longitude;

         WHEREAS,  DACOM wishes to acquire  certain rights to certain  dedicated
capacity on Orion 3 capable of serving the Korean Peninsula; and

         WHEREAS,  Orion is willing to  dedicate  to  DACOM's  use a  customized
payload on Orion 3 consisting of eight (8) 36 MHz Ku-band transponders and three
(3) spare  transponders  (as  defined  hereinafter)  which will cover the Korean
Peninsula  as  described  in and on the terms and  conditions  set forth in this
Agreement;

         NOW, THEREFORE, in consideration of the foregoing,  and intending to be
legally bound, the parties hereto agree as follows:


                                   ARTICLE 1.

                                   DEFINITIONS
                                   -----------

         As used in this Agreement,  unless the context otherwise requires,  the
following terms shall have the following meanings:

         "Acceptance  Test Plan" means the plan for testing the Transponders and
Spare Transponders, both prior to launch and in-orbit, to be agreed among Orion,
DACOM and the satellite  manufacturer  consistent  with customary and reasonable
standards in the industry;

         "Agreement"  means this Agreement as originally  executed and delivered
or, if amended or supplemented, as so amended or supplemented;

         "Commencement  Date" means the date on which Orion (A)  notifies  DACOM
that  (i)  Orion  has  accepted  Orion  3  (or  any  Replacement  Satellite,  as
applicable) from the satellite  manufacturer  after completion of the Acceptance
Test Plan, and (ii) the Transponders are available for use, and (B) delivers the
acknowledgment pursuant to Section 3.3;

         "Confidential  Information" shall have the meaning set forth in Section
16.9;

         "DACOM" means DACOM Corp., a Korean corporation;



<PAGE>



         "Effective Date" means the date of this Agreement;

         "EL" means East Longitude;

         "Force Majeure" means events or occurrences that are beyond the control
of Orion and DACOM and which are described in detail in Section 14.1;

         "Initial  Negotiations"  shall  have the  meaning  set forth in Section
2.4(a);

         "ITU" shall have the meaning set forth in Section 11.1(d);

         Joint  Investment  Amount"  shall have the meaning set forth in Section
5.1;

         "Launch Failure" means the failure of Orion 3 within _______ days after
launch  (i) to reach its  assigned  orbital  location,  or (ii) to have at least
______________   of  the  transponders   meeting  their   respective   technical
specifications,  or (iii) to have  sufficient  stationkeeping  fuel to  maintain
geosynchronous  orbit for a minimum of _________  _____ of the Orion-3  thirteen
(13) year life upon reaching its assigned orbital location, or (iv) to otherwise
be commercially usable for any reason, including without limitation, as a result
of destruction or damage incurred during launch;

         "New Offer" shall have the meaning set forth in Section 2.4(b);

         "Orion" means Orion Asia Pacific Corp., a Delaware corporation;

         "Orion Access  Procedures" means the standards for ground stations that
transmit to Orion 3, and the procedures for operators of such ground stations to
follow when transmitting to Orion 3, as set forth in Exhibit A hereto;

         "Orion 3" means the  communications  satellite  which Orion  intends to
cause to be launched on or before  December 31, 1998,  and to operate at the 139
degrees  EL  orbital  location  or within  plus or minus  three  degrees of that
orbital  location  (i.e.,  between 136 and 142 degrees EL), and any  Replacement
Satellite launched pursuant to Section 2.3;

         "Parties"  means the  signatories to this Agreement and a "Party" means
either signatory;

         "Permitted User" means any sublessee or assignee of DACOM, or any other
entity,  that DACOM permits to use any of the  Transponders  in accordance  with
Sections 9.1 and 9.2;

         "Replacement  Satellite" means a communications  satellite which may be
launched by Orion under the  circumstances  described in Section 2.3(c), if such
satellite  is  designed  to orbit at 139  degrees  EL (plus or minus  three  (3)
degrees)  and is  capable of  providing  capacity  substantially  similar to the
capacity dedicated to DACOM's use under Section 2.1;

         "Regional Beam Transponders"  means transponders on Orion 3, other than
the Transponders and Spare  Transponders,  which cover the Asia-Pacific  region,
including the Korean Peninsula;

                                      -2-
<PAGE>



         "Resale Costs" shall have the meaning set forth in Section 10.3(b);

         "Resale Proceeds" shall have the meaning set forth in Section 10.3(b);

         "Satellite  Failure"  means  that,  at any time after the  Commencement
Date,  (A)(i)  fewer than  _______________  of the  transponders  on Orion 3 are
performing  pursuant to their technical  specifications,  or (ii) Orion 3 can no
longer be maintained in its  North/South  and East/West orbit with tolerances of
_____ degrees,  and (B) Orion, by notice to DACOM,  has declared Orion 3 to be a
failure;

         "Spare Transponders" means certain redundant equipment units consisting
of three (3) dedicated TWTAs and two (2) dedicated receivers; which are designed
as substitutes for equipment  component  units, the failure of which units could
cause a Transponder to fail to meet the Technical Specifications;

         "Successor  Satellite"  means any  satellite  (other than a Replacement
Satellite)  that  Orion  causes  to be  launched  to  substitute  for  Orion  3,
containing Ku-band transponders  designed to provide the same or similar service
as the Transponders on Orion 3;

         "Term" shall have the meaning set forth in Section 4.1;

         "Transponder  Failure," with respect to any Transponder,  means that at
any time  after  the  Commencement  Date (i) the  Transponder  fails to meet the
Technical Specifications in any material respect for a cumulative period of more
than ________ hours during any consecutive  ________day period or (ii) ______ or
more "outage units" occur within a period of _______ consecutive days (an outage
unit being a failure of the Transponder to meet the Technical  Specifications in
any material respect for a period of _________ minutes or more). As used in this
definition,  the  term  "day"  means a  twenty-four  (24)  hour  period  of time
commencing at 12:00 midnight Seoul time;

         "Technical  Specifications" means those minimum  specifications for the
performance of the Transponders  contained in Exhibit B hereto and also referred
to as the "Orion Asia Pacific Technical Specifications for DACOM DTH Payload";

         "Transponders"  means the transponders which DACOM has the right to use
hereunder, as specified in Section 2.1; and

         "TT&C" shall have the meaning set forth in Article 7.

         The Parties understand the terms "Launch Failure,"  "Satellite Failure"
and  "Transponder  Failure"  also  may  be  defined  in  the  contract  for  the
manufacture  or  insurance  of Orion 3. Orion  shall  notify  DACOM of the final
satellite  manufacturing contract or insurance contract and shall provide a copy
of the  foregoing  definitions  therefrom to DACOM.  The Parties will confer and
determine  which, if any such definitions are to be included,  by amendment,  to
this Agreement.


                                      -3-
<PAGE>
                                   ARTICLE 2.

                       ACQUISITION OF TRANSPONDER CAPACITY
                       -----------------------------------

         2.1. Transponders.  DACOM shall acquire from Orion all rights to use as
set forth in this  Agreement  eight (8) 36 MHz Ku-band  Transponders  on Orion 3
(designated as  transponder  numbers 1D through 8D)  twenty-four  (24) hours per
day, each and every day of the year, and for the Term hereof.

         2.2. Spare Transponders.  Orion shall reserve for DACOM's exclusive use
Spare  Transponders on Orion 3 which shall be available to DACOM in the event of
Transponder Failure under the conditions set forth in Section 6.1.

         2.3. Launch Failure or Transponder Failure; Replacement Satellite. If a
Launch  Failure  occurs  with  respect to Orion 3, or if at any time  within the
first _______  months after the  Commencement  Date there are fewer than _______
Transponders  meeting the Technical  Specifications as a result of a Transponder
Failure which cannot be restored pursuant to Section 6.1(c) then,

                  (a) Refund.  DACOM's sole and  exclusive  remedy shall be that
Orion shall unconditionally refund to DACOM all amounts previously paid to Orion
by DACOM pursuant to Sections 5.2 (a)-(d);

                  (b)  Termination.  Either Party may terminate this  Agreement;
and

                  (c)  Replacement   Satellite.   Orion  may,  in  Orion's  sole
discretion,  choose to launch a Replacement Satellite, in which case Orion shall
so notify DACOM and, if such  Replacement  Satellite is scheduled to be launched
within  ____________  months  after such  Launch  Failure,  DACOM shall have the
option to acquire the right to use up to eight (8) 36 MHz  Ku-band  transponders
on the  Replacement  Satellite  for a period of 13 years after the  commencement
date for such  Replacement  Satellite,  on terms  and  conditions  substantially
equivalent to those contained in this Agreement (including charges and payments,
but not including  terms and conditions  not applicable  because of different or
changed  conditions).  DACOM shall exercise such option by notice to Orion given
within  ninety (90) days after Orion  notifies  DACOM of its  decision to launch
such Replacement Satellite. Orion's present intention is to launch a Replacement
Satellite within  ___________  months after any Launch Failure,  but Orion shall
not be legally bound to do so.  Notwithstanding the foregoing,  the Parties will
cooperate to determine if arrangements  can be made with the manufacturer of the
Orion 3 satellite  to have  available a  Replacement  Satellite in a period less
than  ___________  months after a Launch Failure,  and the  conditions,  if any,
under which each Party agrees to proceed.

         2.4.     Successor Satellite.

                  (a) Initial  Negotiations.  In the event that Orion chooses to
launch a Successor  Satellite to succeed  Orion 3,  subject to Section  10.4(b),
DACOM  shall  have the  option  to  acquire  the  right to use  capacity  on the
Successor  Satellite  equivalent  to the  capacity  acquired by DACOM on Orion 3
hereunder  for a  period  of 13  years  after  the  commencement  date  for such
Successor Satellite, on terms and conditions  substantially  equivalent to those
contained in this Agreement (except charges and

                                      -4-
<PAGE>

payments, and except terms and conditions not applicable because of different or
changed  conditions).  DACOM may  exercise  such option by notice to Orion given
within  ninety  (90) days after Orion  notifies  DACOM of Orion's  intention  to
launch a  Successor  Satellite.  Such  notice  by Orion  shall be given at least
____________________  days before Orion notifies the satellite  manufacturer  to
proceed  under its  contract to  manufacture  the  Successor  Satellite  but not
earlier than  __________  months  prior to the end of the Term.  DACOM and Orion
agree to  negotiate  for a period  of up to six (6)  months in good  faith  with
respect  to the fees and  charges  to be paid by DACOM and the  other  terms and
conditions  relating to such  agreement  between  them,  taking into account the
particular  characteristics  of the  Successor  Satellite  and the  transponders
thereon,  the costs to Orion of acquiring and operating the Successor Satellite,
practices then common in the industry,  and other relevant factors ("The Initial
Negotiations").  Such  Initial  Negotiations  shall be  conducted  on a mutually
cooperative basis in consideration of the prior  relationship of DACOM and Orion
during the Term hereof. If Initial  Negotiations are not successfully  concluded
with a binding  agreement within such six (6) month period,  neither Party shall
have any further rights or obligations  regarding Successor  Satellites pursuant
to this Section 2.4, except as set forth in Section 2.4 (b).

                  (b) New offer.  If the Initial  Negotiations  do not lead to a
binding  agreement,  and if within six (6)  months  after the end of the six (6)
month  Initial  Negotiations  period,  Orion has received a bona fide offer that
Orion is willing to accept from a third party for the equivalent  capacity which
was the subject of Initial Negotiations pursuant to 2.4(a), which offer is based
on terms, which as a whole, are more favorable than those previously proposed to
DACOM,  Orion shall  notify DACOM of said terms and  conditions ( "New  Offer").
DACOM shall have a period of thirty (30) days from such notice to accept the New
Offer by written notice to Orion. If DACOM does not accept the New Offer,  Orion
shall be free to enter into an agreement  with the third party and shall have no
further obligation to DACOM for Successor Satellite capacity.

                  (c) No Successor Satellite.  In the event Orion chooses not to
launch a Successor Satellite,  at the request of DACOM, Orion shall consult with
DACOM  regarding  the  process by which  DACOM  might  launch a DACOM  owned and
operated  satellite to continue its DTH service then being  operated on Orion 3,
consistent with Orion's business needs and appropriate  international regulatory
procedures.  Orion  shall not  oppose  DACOM's  applications  to operate a DACOM
satellite at the same frequencies as the  Transponders,  at the orbital location
of Orion 3 so long as DACOM's  operations  would not interfere with the intended
operations of Orion.


                                   ARTICLE 3.

                                    TESTING
                                    -------

         3.1.  Ground  Testing.  Prior to the  shipment of Orion 3 to its launch
site, Orion shall perform or cause the Orion 3 satellite manufacturer to perform
ground testing to determine  whether the Transponders and Spare  Transponders on
Orion 3 are capable of meeting the Technical Specifications. Such ground testing
shall  be  in  accordance  with  the  Acceptance  Test  Plan.   Subject  to  the
requirements of the Orion 3 satellite  manufacturer,  at DACOM's expense,  up to
three (3) representatives of DACOM may be

                                      -5-
<PAGE>

present at such  testing  and  observe  such  testing.  Within  thirty (30) days
following the  conclusion of such ground  testing,  Orion shall furnish to DACOM
results  of  the  ground  test  data  in  Orion's  possession  relating  to  the
Transponders and Spare  Transponders in a format  consistent with the Acceptance
Test Plan. At the  conclusion of the ground  testing and DACOM's  review of such
ground test data, if any of the  Transponders or Spare  Transponders do not meet
the Technical  Specifications in all material respects, Orion shall use the same
level of effort it would use with respect to other  transponders on Orion 3, and
consistent with the Orion 3 manufacturing  contract,  to raise issues (including
those raised by DACOM)  regarding the performance of the  Transponders and Spare
Transponders  and to cause the Orion 3 satellite  manufacturer,  consistent with
program schedule and the best interests of the overall  program,  to correct the
deficiencies and to re-test the Transponders and Spare  Transponders so that all
of the Transponders and Spare Transponders meet the Technical  Specifications in
all material respects.

         3.2. In-Orbit Testing. Following the launch of Orion 3 and prior to the
Commencement Date, Orion shall perform or cause to be performed in-orbit testing
of the Transponders  and all relevant  sub-systems of Orion 3 in accordance with
industry  standards.  Such  in-orbit  testing  shall be in  accordance  with the
Acceptance Test Plan, and shall be designed to confirm that the Transponders and
Spare  Transponders  perform in accordance with the Technical  Specifications in
all material respects. If the test results indicate that any of the Transponders
or  Spare   Transponders  do  not  perform  in  accordance  with  the  Technical
Specifications in all material  respects,  to the extent  technically  feasible,
Orion  shall use the same  level of effort  it would use with  respect  to other
transponders on Orion 3, and consistent with the Orion 3 manufacturing contract,
to raise issues  (including  those raised by DACOM) regarding the performance of
the  Transponders  and Spare  Transponders.  Subject to the  requirements of the
Orion  3  satellite   manufacturer,   at  DACOM's  expense,   up  to  three  (3)
representatives  of DACOM may be present during such in-orbit  testing,  observe
such testing, and be supplied with results of the in-orbit test data relating to
the  Transponders  and  Spare  Transponders  in a  format  consistent  with  the
Acceptance Test Plan.

         3.3.  Conclusion  of  Tests.  At  the  satisfactory  conclusion  of the
in-orbit testing  described in Section 3.2, Orion shall  acknowledge to DACOM in
writing that the Orion 3 satellite  manufacturer has delivered its certification
regarding the performance of Orion 3 and either that (i) all of the Transponders
meet the Technical  Specifications in all material respects or (ii) that some or
all of the Transponders do not meet the Technical Specifications in all material
respects and the extent of any deficiencies. Simultaneously with the delivery of
the  acknowledgment  with the  manufacturer's  certificate  attached by Orion to
DACOM,  the  Commencement  Date shall  occur,  subject to DACOM's  rights  under
Section 2.3 hereof if  acknowledgment by Orion is pursuant to clause (ii) above.
Upon the  Commencement  Date, DACOM may commence the use of the Transponders and
Spare Transponders  pursuant to this Agreement for any business purpose of DACOM
including without limitation the DTH trial service..

         3.4.   Accommodation  of  DACOM  Personnel.   ORION  shall  permit  the
representatives  of DACOM  that  observe  the tests  pursuant  to  Article 3 and
monitor the  construction  pursuant to Article 8, to share any office  space and
facilities  supplied  to Orion by the  Orion 3  satellite  manufacturer.  To the
extent such space and  facilities  are not made  available by the  manufacturer,
Orion shall, at its expense, provide for the use

                                      -6-
<PAGE>



of office space and computer and  communications  equipment  (but not  including
long  distance  or  international  charges  for the use  thereof)  by such DACOM
personnel.

         3.5.  Qualifications  of DACOM  Personnel.  All  DACOM  personnel  that
observe the tests pursuant to Article 3 and monitor the construction pursuant to
Article 8, shall be fully  qualified,  in the reasonable  good faith judgment of
Orion,  to  perform  the  functions  involved  with  the test  observations  and
construction monitoring.  DACOM shall provide to Orion the qualifications of its
personnel,  and Orion shall approve or disapprove such qualifications,  prior to
such personnel leaving Korea.

         3.6.  Schedule.  The  schedule  that  the  manufacturer  of Orion 3 has
offered to Orion  projects a launch date for Orion 3 on or before  December  31,
1998,  and a Commencement  Date on or before  January 31, 1999.  Orion shall use
reasonable  efforts to  negotiate  with the Orion 3  satellite  manufacturer  to
obtain an earlier launch date and Commencement Date, consistent with maintaining
quality control.  If the Commencement Date is delayed and if, due to such delay,
Orion receives any damages from the Orion 3 satellite manufacturer,  Orion shall
pay to DACOM  ______  ___________  of the  amount  of such  damages  that  Orion
receives from the satellite manufacturer,  unless DACOM has exercised its rights
to terminate this Agreement  pursuant to Section 10.1(a) hereof and to receive a
refund.


                                   ARTICLE 4.

                                      TERM
                                      ----

         4.1.  Term.  The period  during which DACOM shall have the right to use
the Transponders  shall begin as of the Commencement  Date, and shall end on the
thirteenth  (13th)  anniversary  of the  Commencement  Date (the "Term")  unless
terminated earlier pursuant to Article 10.

         4.2.  Orion's Right at End of Term. At the end of the Term, Orion shall
have no further obligations to DACOM hereunder.


                                   ARTICLE 5.

                                    PAYMENTS
                                    --------

         5.1. Joint Investment  Amount.  The Joint Investment  Amount payable by
DACOM for its right to use the  Transponders  and Spare  Transponders,  shall be
Eighty  Nine  Million  United  States  Dollars   (89,000,000  USD)  (the  "Joint
Investment Amount"), which may be subject to adjustment pursuant to Section 5.7.

         5.2. Payment Schedule.  The Joint Investment Amount due hereunder shall
be due and payable to Orion as follows:


                  ------------------------------------------------------

                                      -7-
<PAGE>




                  ------------------------------------------------------

                  ------------------------------------------------------

                  ------------------------------------------------------

                  ------------------------------------------------------


         5.3. Notice of Payment,  Payments,  Taxes and Bank Charges. Orion shall
submit a Notice of Payment to DACOM for all payments due  hereunder  thirty (30)
days in advance  of the  payment  date.  Such  Notice  shall be  transmitted  by
facsimile  with an original by U.S.  first class mail. All payments due to Orion
hereunder shall be made by electronic transfer of immediately available funds to
a bank account  designated by Orion to DACOM from time to time,  net of any bank
fees,  duties,  taxes  (withholding or otherwise) or similar charges that may be
imposed by DACOM's bank or by any  governmental  authority of Korea or any other
nation or any political subdivision.

         5.4.  Time of Payment.  The due dates for all  payments  required to be
made to Orion shall be as  specified  in Section  5.2.  Orion shall be deemed to
have received  payment from DACOM at the time the payment is received by Orion's
designated bank. DACOM acknowledges and agrees that any failure by it to pay any
amount due to Orion  hereunder  within  fifteen (15) days of receipt of a notice
from Orion that such payment is due shall  constitute a material  breach of this
Agreement.

         5.5.  Late Payment  Penalty  Interest.  If any amount  payable by DACOM
hereunder is not received when due,  such amount shall bear interest  until paid
at the rate of 18% per annum, calculated daily.

         5.6. Security.

                  (a) DACOM. On or before March 31, 1997, DACOM shall deliver to
Orion an irrevocable stand by letter of credit, in the form of Exhibit C hereto,
of  Citibank,  N.A.,  or another  bank  satisfactory  to Orion in  Orion's  sole
discretion,  securing  in full the  obligations  of  DACOM to make  when due the
payments  to  Orion  required  by  clauses  (d) and (e) of  Section  5.2 and any
interest required by Section 5.5.

                  (b) Orion. Concurrent with the receipt of payments pursuant to
Sections  5.2(a),  (b), (c) and (d), Orion shall deliver to DACOM an irrevocable
stand by letter of credit, in the form of Exhibit C hereto,  of Citibank,  N.A.,
or another bank  satisfactory to DACOM in DACOM's sole discretion,  securing the
obligations of Orion to refund in accordance  with the terms of this  Agreement,
amounts received by Orion pursuant to Sections 5.2(a), (b), (c) and (d).


                                      -8-
<PAGE>



                  (c)  Insurance as Security.  After the launch date of Orion 3,
the Parties will cooperate to determine if Orion can obtain an insurance  policy
that after the  Commencement  Date, could substitute for, or replace the letters
of credit  required  herein  and that would  provide  DACOM,  in its  reasonable
judgment,  with security for any refunds  reasonably  comparable to the security
provided by the letters of credit.  DACOM is under no legal obligation to accept
such substitute for the letters of credit.

         5.7. Adjustment.  If, at the end of the ______ month anniversary of the
Commencement Date, there have been no unrestored Transponder Failures that would
entitle DACOM to a refund pursuant to Section 2.3(a),  but the Orion 3 satellite
has  experienced a partial  failure such that the fuel on board is sufficient to
maintain normal stationkeeping for more than ___________________ years after the
Commencement  Date but for less than _______ years after the Commencement  Date,
DACOM  shall  be  entitled  to an  adjustment  in the  Joint  Investment  Amount
calculated as follows:

Amount of Adjustment = ________ x 89,000,000 USD
where A = the  number  of  years  of  projected  fuel  life of  Orion 3 from the
Commencement Date

The amount of the adjustment,  if any, shall be credited against the payment due
from DACOM pursuant to Section 5.2(e), and if the adjustment is greater than the
amount of such payment, the balance of the adjustment shall be refunded to DACOM
by Orion.


                                   ARTICLE 6.

               TRANSPONDER FAILURE AND RESTORATION; OTHER FAILURE
               --------------------------------------------------

         6.1. Spare Transponders; Transponder Failure; Restoration.

                  (a) Spare  Transponders.  After the  Commencement  Date  DACOM
shall  have the  right to use  Spare  Transponders  on Orion 3 in the event of a
Transponder  Failure,  if Spare  Transponders are then available for DACOM's use
and are not then being used for the benefit of DACOM. Orion shall have the right
to  utilize  any and all  Spare  Transponders  in any  manner  it  deems  fit in
performance of its obligations under Section 6.1(c).

                  (b) Notice of Transponder Failure. Each Party shall notify the
other Party as soon as reasonably  possible upon learning of the commencement of
any event which, with the passage of time, could result in a Transponder Failure
and of the relevant  facts known to it  concerning  such event.  For purposes of
determining  whether a  Transponder  Failure  has  occurred,  the  point  when a
Transponder fails to meet its Technical  Specifications  shall be deemed to have
commenced upon receipt by Orion of notification  thereof from DACOM,  subject to
Orion's  verification  that the  Transponder is not  performing  pursuant to the
Technical  Specifications  in any material  respect.  The event which,  with the
passage of time,  could result in a Transponder  Failure shall be deemed to have
ended,  and the  Transponder  shall be deemed to have been restored,  when Orion
notifies DACOM that such Transponder has resumed  performance in accordance with
the  Technical   Specifications  in  all  material  respects  or  that  a  Spare
Transponder has been made available to DACOM.


                                      -9-
<PAGE>



                  (c)  Restoration.  In the event that a  Transponder  becomes a
Transponder  Failure, it shall be restored as soon as possible and to the extent
technically  feasible (and in all events if technically  feasible  within twelve
(12)  hours)  by a  Spare  Transponder  on  Orion  3 that  meets  the  Technical
Specifications  in all  material  respects.  Orion shall have no  obligation  to
restore  a  Transponder  Failure  if,  for any  reason,  there is no such  Spare
Transponder then available.

         6.2. Risk of Transponder  Failure.  After the ____month period referred
to in Section 2.3 has expired, Orion shall have no liability,  responsibility or
obligation  with  respect  to any  Transponder  Failure  or  loss  of use of the
Transponders  for any reason  whatsoever,  except as provided in Section 6.1 and
DACOM  shall have no rights to refunds  of any Joint  Investment  Amounts or any
other  remedies,  whether or not a  Transponder  that has  become a  Transponder
Failure is  restored,  and  regardless  of whether  Orion 3 becomes a  Satellite
Failure  or is  otherwise  retired  pursuant  to this  Agreement.  DACOM will be
responsible  for obtaining and  maintaining any insurance to cover its insurable
interests on the  Transponders  or the operations of Orion 3 as DACOM chooses to
obtain and  maintain in DACOM's  sole  discretion,  and the proceeds of any such
insurance shall be payable to DACOM and not to Orion. At DACOM's request,  Orion
shall use reasonable efforts to assist DACOM in obtaining any such insurance.

         6.3  In-Orbit  Insurance.  Orion  and  DACOM  shall  cooperate  in  the
procurement  of a commitment  for insurance on or before June 30, 1997, to cover
the loss of the Orion 3  Satellite  and the  Transponders  for a period at least
twelve (12) months  after  launch of Orion 3 and for such  additional  period as
DACOM  wishes to have and that is available  from the  insurance  market.  Orion
shall be  responsible  for the cost of the  insurance  coverage and shall be the
loss payee during the period ending six (6) months after the Commencement  Date.
DACOM shall be responsible  for the cost of the insurance  coverage and shall be
the loss payee during the period beginning six (6) months after the Commencement
Date through the end of the term of the insurance policy.  DACOM shall be solely
responsible  for any  additional  insurance  on the  Transponders  it  wishes to
obtain.  Orion represents that it has been advised that an insurance  product is
currently available in the market that would provide coverage for a period of at
least twelve (12) months.


                                   ARTICLE 7.

                         TRACKING, TELEMETRY AND COMMAND
                         -------------------------------

         Throughout  the Term,  Orion or its  affiliates,  at  Orion's  cost and
expense shall  provide for all the functions of tracking,  telemetry and command
("TT&C") including,  without limitation,  operational monitoring of Orion 3, the
Transponders   and  the   other   transponders   and   equipment   on  Orion  3,
stationkeeping,  attitude control, and other satellite maintenance and switching
functions as shall be necessary to maintain the  Transponders in accordance with
the Technical  Specifications.  Such TT&C shall be accomplished  from facilities
located  as Orion  may  determine.  Orion  shall  promptly  notify  DACOM of its
selection of the primary sites for TT&C facilities.



                                      -10-
<PAGE>



                                   ARTICLE 8.

            CONTRACT PARTICIPATION RIGHTS; REPORTS AND COMMUNICATIONS
            ---------------------------------------------------------

         Orion will  provide  DACOM  with the  following  participation  rights,
reports and communications regarding the construction and operation of Orion 3:

         8.1. Participation In Satellite Construction Monitoring. Subject to the
requirements of the  manufacturer of the Orion 3 satellite,  representatives  of
DACOM may participate  with Orion in the monitoring  activities  associated with
the construction of Orion 3. The number of DACOM monitoring  representatives may
not exceed the number of Orion monitoring  representatives and in no event shall
exceed three (3). Such  representatives  shall be qualified,  shall be permanent
throughout  the  construction  period (unless  prohibited by disease,  injury or
death) and shall conduct  themselves and their activities in accordance with all
relevant requirements of the satellite manufacturer. DACOM representatives shall
be  permitted  to  participate  in such  monitoring  activities  and to  receive
documentation  (including  drawings) to the extent allowed by the  manufacturer.
Orion shall maintain sole  responsibility and control over the monitoring of the
construction  of Orion 3. Any  representatives  of DACOM  permitted  to  monitor
satellite construction shall do so under the strict supervision of Orion and the
manufacturer of Orion 3 and shall abide by the  instructions and requirements of
Orion and the manufacturer in every respect.  Such representatives shall have no
rights  whatsoever  to  direct  or  authorize  any  activities  related  to  the
construction of Orion 3, including but not limited to, ordering or approving any
changes in the design or  specifications  of Orion 3 or any  component  thereof.
DACOM shall be solely responsible for salaries,  living expenses,  and all other
expenses associated with any of its representatives  permitted to participate in
the monitoring of satellite construction. In no event shall such representatives
be considered employees, agents, or consultants of Orion.

         8.2. Schedule/Progress Reports/Meetings. Between the Effective Date and
the Commencement  Date, on the same general schedule as Orion receives  progress
reports from the Orion 3 satellite  manufacturer,  Orion shall submit to DACOM a
report on the frequency coordination,  construction, launch and testing of Orion
3. Orion shall conduct  quarterly  progress  report meetings with up to five (5)
DACOM  representatives  to discuss  matters  related to the satellite  orbit and
frequency coordination,  construction, launch, and testing of Orion 3. An agenda
for each meeting  shall be submitted to DACOM at least seven (7) days in advance
thereof, along with any materials Orion has then prepared for such meeting. Such
meetings  shall be  scheduled  at  mutually  convenient  times and shall be held
either at Orion's  offices in  Rockville,  Maryland or at the  facilities of the
Orion 3 satellite manufacturer in California. DACOM shall be responsible for the
expenses of its  representatives  participating in the progress report meetings.
Orion  shall  notify  DACOM  promptly  of any event  that  would have a material
adverse effect on the current schedule for construction,  launch, and testing of
Orion 3.

         8.3. Operational Reports and Communications. Following the Commencement
Date,  Orion shall  provide DACOM with  quarterly  written  operational  reports
concerning  Orion 3 and the Transponders  and Spare  Transponders.  Such reports
shall contain the elements set forth in Exhibit D hereto.  Orion shall  promptly
furnish DACOM with copies of written  communications to or from Orion to or from
any  governmental  authority or its insurance  carrier (and any Orion  responses
thereto)




                                      -11-
<PAGE>



which  concern  Orion 3, the contents of which  materially  affect  operation of
Orion 3 or the Transponders.

         8.4. Anomalous Operation Notification. Orion shall notify DACOM as soon
as reasonably possible, by telephone or in writing, of any significant incidents
(and any Orion  responses  thereto ) that have a  potential  material  effect on
Orion 3 or on the  Transponders.  Orion shall also notify DACOM  promptly of any
circumstances that make it clearly ascertainable or predictable that any of such
incidents will occur (and any Orion response thereto).


                                   ARTICLE 9.

                      USE OF TRANSPONDERS/ORION 3 SATELLITE
                      -------------------------------------

         9.1. Use of and Right to  Transponders.  DACOM agrees,  and DACOM shall
require any of its  Permitted  Users to agree,  that its or their use of Orion 3
and the Transponders, and its or their transmissions to the Transponders,  shall
comply  in all  respects  with  the  laws and  regulations  (including,  without
limitation,  any  subversive,  obscenity or other content  standards) of (i) all
countries having jurisdiction over DACOM or such use or transmissions,  (ii) all
countries from which DACOM or Permitted  Users uplink  transmissions  to Orion 3
and (iii) all countries in which DACOM's or Permitted Users'  transmissions  are
authorized for reception by DACOM and Permitted Users.  Upon receipt by Orion of
a written  communication  from a government agency, and with prior notice to and
consultation  with  DACOM,  Orion shall have the right to suspend the use of the
Transponders  by DACOM,  and/or DACOM's  Permitted  Users, if and so long as, in
Orion's reasonable judgment, the continued use of Orion 3 or the Transponders by
DACOM or such Permitted Users in violation of the above laws and regulations may
jeopardize  Orion's  right to  operate  Orion 3 or may have a  material  adverse
effect upon Orion.

         9.2. Technical  Responsibilities  of DACOM. DACOM shall be responsible,
at its cost and  expense,  for  providing  all uplink  facilities  and  services
necessary  to  transmit  information  to  Orion 3 and the  Transponders  and all
reception facilities and services necessary to receive  transmissions from Orion
3 and the  Transponders.  DACOM  and  Permitted  Users  shall  have the right to
uplink, or arrange for uplinking, to the Transponders from any uplink facilities
in any locations within the uplink  footprint of the Transponders  that meet the
Orion Access Procedures. When signals are being transmitted to the Transponders,
DACOM and/or its Permitted Users shall be responsible for proper illumination of
the  Transponders in compliance with the Orion Access  Procedures,  so as not to
interfere  with  the  use of or  cause  harm  to  the  Transponders,  any  other
transponders,  Orion 3 or any other satellite. For purposes of this Section 9.2,
interference  shall include  causing a transponder to fail to meet its technical
specifications.  Should improper  illumination be detected by Orion, Orion shall
immediately  notify and consult with DACOM or its  Permitted  Users and DACOM or
the  Permitted  Users  shall  be  responsible  for  taking  corrective  measures
immediately. If DACOM or the Permitted Users fail to take such action within ten
(10) minutes of notification  from Orion,  Orion may suspend the  non-conforming
transmissions  and Orion may take all action  reasonably  needed to effect  such
suspension,  including but not limited to deactivation of the Transponders until
such  non-conformance  has been  corrected.  DACOM and each  Permitted User that
transmits to Orion 3 shall provide

                                      -12-
<PAGE>



Orion with a telephone  and facsimile  number for each such uplink  facility and
shall  maintain  personnel  fluent in English at each such uplink  facility on a
twenty-four  (24) hours per day,  seven (7) days per week basis.  Such personnel
shall be under strict  instructions  from DACOM or the  Permitted  User to cease
transmissions to Orion 3 immediately upon request from Orion.

         DACOM  and  all  of its  Permitted  Users  shall  submit  its or  their
frequency and transmission  plans, as specified in the Orion Access  Procedures,
and any proposed changes thereto, to Orion for approval prior to transmission or
any proposed  change thereof and shall take all necessary  precautions to ensure
that its or their use of the  Transponders  is in conformity  with such approved
frequency and  transmission  plans and is in all other respects  consistent with
the  Orion  Access  Procedures.  Orion's  approval  or  disapproval  of  DACOM's
transmission  plans shall be based on the criteria set forth in the Orion Access
Procedures and shall not be unreasonably withheld, conditioned or delayed.

         9.3.  Interruption Rights in Abnormal  Circumstances.  DACOM recognizes
that it may be necessary, in unusual or abnormal technical situations or certain
unforeseen  conditions,  for Orion to deliberately interrupt the Transponders in
order to protect the overall  health and  performance of Orion 3. Such decisions
shall be made by Orion in its sole  discretion,  but Orion shall treat DACOM and
other  transponder users or lessees,  equally in determining which  transponders
shall be interrupted or preempted. Orion shall give DACOM as much advance notice
as practicable of the need to interrupt any of the  Transponders.  DACOM and any
affected  Permitted User shall immediately cease transmission to Orion 3 at such
time as a Transponder is interrupted pursuant to this Section 9.3.

         9.4.  Orion's  Rights to  Satellite.  Unless other  provisions  of this
Agreement stipulate otherwise, Orion shall have the right to use Orion 3 and any
other transponders or spare transponders on Orion 3 for any purpose  whatsoever,
and Orion shall have sole  responsibility  for the operation and  maintenance of
Orion 3. Orion shall have the right to assign or transfer  its interest in Orion
3, or any portions thereof,  to any entity,  including an assignment or transfer
to a financing  entity as  security  for loans or other  advances  made to Orion
provided that Orion shall not attempt to transfer any of DACOM's interest in the
Transponders or Spare Transponders  without DACOM's consent.  Orion shall notify
DACOM of any such assignment or transfer,  and the assignee or transferee  shall
acknowledge  in  writing,  DACOM's  rights  to use the  Transponders  and  Spare
Transponders   hereunder.   Orion  shall  supply  DACOM  with  a  copy  of  such
acknowledgment. If Orion transfers Orion 3 to another entity, Orion shall assure
that Orion 3 is operated by an entity  technically  competent to maintain proper
operation of the Transponders and Spare Transponders.

         9.5.  Reactivation.  If Orion takes any action to suspend or deactivate
DACOM's or any Permitted User's transmissions  pursuant to this Article 9, Orion
shall promptly  reactivate such transmissions  upon the resolution  favorable to
DACOM  or such  Permitted  User of any  issue  that  led to such  suspension  or
deactivation.  Under no circumstances shall Orion be responsible for any loss or
damage to DACOM or a Permitted  User for any action taken by Orion in conformity
with Orion's rights under this Article 9.


                                      -13-
<PAGE>



         9.6 Regional Beam  Transponders.  At the request of DACOM,  Orion shall
negotiate in good faith the terms and  conditions  pursuant to which DACOM might
acquire the use of capacity on any available  Regional Beam  Transponders.  Such
negotiations shall be conducted on a mutually cooperative basis in consideration
of the relationship between DACOM and Orion.


                                   ARTICLE 10

                                   TERMINATION
                                   -----------

         10.1.  Termination  by DACOM.  DACOM may terminate  this Agreement upon
thirty (30) days'  (except as  specified  in Section  10.1(a)(ii)  below)  prior
written notice under the following circumstances:

                  (a)      For Cause.

                           (i) Launch  Delay;  Launch  Failure;  Loss of Orbital
         Position.  Subject to clause (ii) below,  if Orion 3 is not launched by
         ______ or if the Commencement Date is delayed beyond ______ or if there
         is a Launch  Failure and DACOM does not timely  exercise  its option to
         acquire  the  right  to use  transponders  on a  Replacement  Satellite
         pursuant to Section 2.3 (or if such Replacement Satellite option is not
         made available to DACOM by Orion),  or if the orbital position in which
         Orion 3 is located  is not  within  the range of 136  degrees EL to 142
         degrees EL;

                           (ii) Anticipated  Delay. If, prior to the shipment of
         the Orion 3 satellite to the launch site, the manufacturer of the Orion
         3  satellite  certifies  that,  because of  termination  of the Orion 3
         satellite  construction  contract or for other reasons, the launch date
         will not occur by ____________ or the Commencement  Date will not occur
         by ____________ then Orion shall promptly notify DACOM and advise DACOM
         of the rescheduled  launch date and Commencement  Date, and, within ten
         (10) days of such notice,  DACOM may elect to terminate this Agreement,
         provided  that if DACOM  does not  terminate  within  such ten (10) day
         period, it shall not be permitted to terminate this Agreement for delay
         or obtain a refund for failure to meet the launch date and Commencement
         Date set forth in  Section  10.1.(a)(i)  unless  the Orion 3  satellite
         manufacturer  fails to meet the rescheduled launch date or Commencement
         Date;

                           (iii) Transponder Failure. If, at any time within the
         first ______  months after the  Commencement  Date there are fewer than
         eight (8) Transponders meeting the Technical Specifications as a result
         of a Transponder  Failure which cannot be restored  pursuant to Section
         6.1(c)  and DACOM does not timely  exercise  its option to acquire  the
         right  to use  transponders  on a  Replacement  Satellite  pursuant  to
         Section  2.3 (or if  such  Replacement  Satellite  option  is not  made
         available to DACOM by Orion);

                           (iv) Insolvency.  If, prior to the Commencement Date,
          any bankruptcy,  liquidation or insolvency  proceedings are instituted
          involving  Orion or its parent,  Orion Network  Systems,  Inc., as the
          debtor or insolvent party and such proceeding is not dismissed  within
          sixty (60) days; or


                                      -14-
<PAGE>




                           (v) Misrepresentation. If, between the Effective Date
          and  ______  months  after  the   Commencement   Date,   any  material
          representation by Orion under Article 11 hereof proves to be incorrect
          in any material respect, and such incorrect  representation  cannot be
          cured by Orion within  thirty (30) days after  notice from DACOM,  and
          such incorrect  representation  will have a material adverse effect on
          DACOM's rights to use the Transponders and Spare  Transponders for the
          Term.

                  (b)      For DACOM's Convenience.

                  If DACOM fails, by _________ to obtain all necessary approvals
of Korean  governmental  authorities,  as contemplated by Section 12.3, in which
case DACOM shall notify Orion of such termination on or before _____________ and
shall  forfeit to Orion as a termination  payment the sum of Ten Million  United
States Dollars  (10,000,000  USD) paid to Orion pursuant to section  5.2(a).  If
DACOM has not provided  notice of termination  under this Section  10.1(b) on or
before  ____________,  DACOM's  right to terminate  for  convenience  under this
Section shall expire.

         10.2  Termination  by Orion.  Orion may terminate  this  Agreement upon
thirty (30) days' prior written notice under the following circumstances:

                  (a) Launch Delay;  Launch Failure.  If Orion 3 is not launched
by May 31, 1999, or if the Commencement Date is delayed beyond ___________ or if
Orion is unable,  for any reason,  to enter into an  agreement  with a satellite
manufacturer to deliver Orion 3 by such dates;;

                  (b) Satellite Failure. If Orion 3 is a Satellite Failure prior
to  the  end  of  the  Term  and  Orion  cannot  provide  continued  use  of the
Transponders  and elects not to provide  transponders  on a Successor  Satellite
pursuant to Section 10.4;

                  (c)  Governmental  Restriction.  If, prior to the Commencement
Date, the  performance  of this Agreement  pursuant to the terms hereof has been
prohibited by any court,  governmental or regulatory body with jurisdiction over
Orion and such prohibition is no longer subject to further proceedings or review
at any  administrative or judicial level and no stay has been granted or request
for stay is pending;

                  (d) Force Majeure. If, prior to the Commencement Date, Orion's
operation of Orion 3 or the Transponders is prevented by reason of Force Majeure
for a period of thirty (30) consecutive days; or

                  (e) Breach of Agreement. If DACOM commits a material breach of
any of the  provisions of this  Agreement and such material  breach has not been
cured within thirty (30) days after  receipt by DACOM of Orion's  notice of such
breach.

         10.3.    Consequences of Termination.

                  (a) Refund.  If DACOM  terminates  this Agreement  pursuant to
clauses  (i)  through  (v) of Section  10.1(a)  and elects a refund  pursuant to
Section  2.3(a),  or if Orion  terminates  this  Agreement  pursuant to Sections
10.2(a), (c) or (d), DACOM, as


                                      -15-
<PAGE>

its sole and exclusive  remedy,  shall be entitled to a refund of all amounts it
has theretofore  paid to Orion for Joint  Investment  Amount pursuant to Section
5.2. In addition Orion shall be relieved of any further  obligation or liability
under this  Agreement.  If this  Agreement is  terminated  for any other reason,
DACOM  shall not be entitled  to any refund of Joint  Investment  Amounts or any
other remedy of any kind. Upon termination of this Agreement for any reason, and
refund by Orion of any Joint Investment Amounts as may be specifically  required
by this Section 10.3(a), neither Party shall have any further obligations to the
other Party,  and Orion shall be free to lease,  sell, use or dispose of Orion 3
and any of the  Transponders  and Spare  Transponders  in any manner Orion deems
appropriate.

                  (b)  Resale  by  Orion.  If Orion  terminates  this  Agreement
pursuant to  subparagraph  (e) of Section 10.2,  DACOM shall be obligated to pay
the unpaid portion of the Joint  Investment  Amount and Orion may call any DACOM
letters of credit and retain the  proceeds  thereof and those  payments  made to
date by DACOM under this Agreement, and if Orion chooses to and does sell, lease
or otherwise  dispose of the right to use any of the  Transponders,  the Parties
shall make payments as follows:

                           (i) If the amount of purchase  price,  lease payments
         or capacity  charge to be  realized  by Orion from such sale,  lease or
         disposition  of  the  Transponders  and  Spare  Transponders   ("Resale
         Proceeds")  is less than the sum of Orion's  Resale  Costs (as  defined
         below) plus  _________________  ___________________________  then DACOM
         shall pay to Orion the difference  between the Resale  Proceeds and the
         sum of the Resale  Costs plus  _________  _____________________________
         provided,  if DACOM's Joint Investment Amounts paid to date exceed said
         difference,  DACOM  shall make no  further  payments,  and Orion  shall
         refund to DACOM ___________________________ of such excess; and

                           (ii) If the Resale  Proceeds are more than the sum of
         Orion's                 Resale                Costs                plus
         ______________________________________________  then Orion shall refund
         to  DACOM  ______________________  of the  aggregate  amount  of  Joint
         Investment Amounts theretofore paid by DACOM to Orion.

For purposes of this Section 10.3,  "Resale  Costs" means all costs and expenses
incurred by Orion as a result of such  termination  and in connection  with such
sale, lease or other disposition.

         10.4.  Retirement of Orion 3. If at any time during the Term Orion 3 is
a Satellite Failure:

                  (a) Continue Operations. Orion shall (unless this Agreement is
terminated by DACOM) use reasonable  efforts  (including  negotiations  with any
insurance  carrier  entitled to salvage value of Orion 3) to continue  operating
the Transponders for the remainder of the Term, if such operation is technically
and administratively practicable; or

                  (b) Successor  Satellite.  Orion may retire Orion 3 and choose
to launch a Successor Satellite,  in which case Orion shall so notify DACOM and,
if such Successor  Satellite is launched within  ____________  months after such
retirement  of Orion 3, DACOM  shall have the option to acquire the right to use
capacity on the

                                      -16-
<PAGE>

Successor Satellite  equivalent to the capacity acquired by DACOM on Orion 3 for
a term of up to  thirteen  (13) years from the date when such  transponders  are
available for service, on terms and conditions substantially equivalent to those
contained in this Agreement  (except charges and payments,  and except terms and
conditions  not  applicable  because of  different or changed  conditions).  The
process for exercising  DACOM's Successor  Satellite option, and for negotiation
of an agreement for such Successor Satellite, shall be governed by Section 2.4.

         10.5. Launch  Failure/Salvage.  If (a) Orion 3 is a Launch Failure, and
(b) DACOM exercises its right to a refund under Section 2.3, and (c) some of the
Transponders  are  still  operational,   and  (d)  the  Transponders  have  been
transferred  to the Orion 3  satellite  insurer or  manufacturer,  then,  at the
request of DACOM,  Orion  shall use  reasonable  efforts  to  acquire  from such
insurer  or  manufacturer  the  rights  for DACOM to use such  Transponders,  at
DACOM's  expense,  under  terms and  conditions  acceptable  to DACOM and Orion,
including appropriate consideration to Orion.


                                   ARTICLE 11.

                     REPRESENTATIONS AND WARRANTIES OF ORION
                     ---------------------------------------

         11.1. Representations and Warranties.  Orion represents and warrants to
DACOM as follows:

                  (a)  Incorporation,  power,  etc. Orion is a corporation  duly
organized,  validly existing and in good standing under the laws of the State of
Delaware,  U.S.A.,  with all  necessary  corporate  power to own and  lease  its
properties  and to carry on its  business as and where such  properties  are now
owned or leased and such business is now being carried on;

                  (b) Due  Authorization  of  Agreement;  No Conflict With Other
Instruments.  Orion has full  power and  authority  and has taken all  necessary
action to execute,  deliver and consummate this Agreement and to perform all the
terms and conditions  hereof to be performed by Orion. This Agreement is a valid
and binding obligation of Orion enforceable against Orion in accordance with its
terms,  except  as the  enforceability  hereof  may be  limited  by  bankruptcy,
insolvency  or other laws of general  application  relating to or affecting  the
enforcement of creditors' rights or by general principles of equity limiting the
availability of equitable remedies.  The execution and delivery by Orion of this
Agreement,  the consummation by Orion of the  transactions  which this Agreement
contemplates  will be  consummated  by Orion,  and  Orion's  fulfillment  of and
compliance with the terms and provisions  hereof applicable to Orion, do not and
will not (i)  violate  any law  applicable  to Orion  (although  Orion  makes no
representation or warranty concerning any right to the orbital location proposed
for Orion 3),  or (ii)  conflict  with,  result in a breach of or  constitute  a
default under Orion's articles of incorporation or bylaws;

                  (c)  Government  Regulation.  The terms and conditions of this
Agreement,  including  the  payments  provided  for  herein,  are not subject to
regulation  or review by or  consent  from any  governmental  or  administrative
agency in the United  States to which  Orion is subject  and cannot be  amended,
modified or changed without the prior written consent of Orion and DACOM.  There
is no requirement for a waiver

                                      -17-
<PAGE>



from the Federal  Communications  Commission  under Section 319(d) of the United
States  Federal  Communications  Act or for any  other  authorizations  from the
Federal Communications  Commission for Orion to construct the Orion 3 satellite;
and

                  (d)  Treaties.  For the  avoidance  of  doubt  and the sake of
clarity,  under  the  current  INTELSAT  Treaty  and the  current  rules  of the
International  Telecommunications  Union ("ITU"),  there are no provisions  that
would  permit  INTELSAT  or the ITU, as  organizations,  to order a delay in the
launch of the Orion 3 satellite.

         11.2.  Exclusion  of  Warranties.  ORION  MAKES NO  REPRESENTATIONS  OR
WARRANTIES OF ANY KIND OR NATURE WHATSOEVER,  WHETHER EXPRESS OR IMPLIED,  AS TO
THE CONDITION OF ORION 3 OR THE  TRANSPONDERS  OR SPARE  TRANSPONDERS.  ALL SUCH
WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED.  DACOM ACKNOWLEDGES THAT ORION MAKES
NO WARRANTY OF ANY KIND, AND IN PARTICULAR THAT THERE IS NO IMPLIED  WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE ASSOCIATED WITH ORION 3 OR
THE  TRANSPONDERS  OR SPARE  TRANSPONDERS.  DACOM SHALL INDEMNIFY ORION AND HOLD
ORION  HARMLESS  FROM ANY CLAIMS MADE UNDER ANY  WARRANTY OR  REPRESENTATION  BY
DACOM TO ANY THIRD PARTY AS TO ORION 3 OR THE TRANSPONDERS.

         11.3  Manufacturer  Reimbursement.  To the extent that, after the sixth
(6th) month  anniversary  of the  Commencement  Date, one (1) or more of DACOM's
Transponders becomes a Transponder Failure that cannot be restored and, if Orion
receives any compensation for such Transponder  Failure from the manufacturer of
the Orion 3 satellite,  Orion shall pay to DACOM the amount of any  compensation
received from the manufacturer allocable to the Transponder Failure, taking into
account any other transponders on Orion 3 that may also have failed.


                                   ARTICLE 12.

                     REPRESENTATIONS AND WARRANTIES OF DACOM
                     ---------------------------------------

         DACOM represents and warrants to Orion as follows:

         12.1. Incorporation, Power, etc. DACOM is a corporation duly organized,
validly  existing  and in good  standing  under  the  laws of  Korea,  with  all
necessary  corporate  power to own and lease its  properties and to carry on its
business as and where such  properties are now owned or leased and such business
is now being carried on;

         12.2.  Due   Authorization   of  Agreement;   No  Conflict  With  Other
Instruments.  DACOM has full  power and  authority  and has taken all  necessary
action to execute,  deliver and consummate this Agreement and to perform all the
terms and conditions  hereof to be performed by DACOM. This Agreement is a valid
and binding obligation of DACOM enforceable against DACOM in accordance with its
terms,  except  as the  enforceability  hereof  may be  limited  by  bankruptcy,
insolvency  or other laws of general  application  relating to or affecting  the
enforcement of creditors' rights or by general principles of equity limiting the
availability of equitable remedies. The execution and


                                      -18-
<PAGE>



delivery  by  DACOM  of  this  Agreement,  the  consummation  by  DACOM  of  the
transactions which this Agreement contemplates will be consummated by DACOM, and
DACOM's  fulfillment  of and  compliance  with the terms and  provisions  hereof
applicable  to DACOM,  do not and will not (i)  violate  any law  applicable  to
DACOM,  or (ii)  conflict  with,  result in a breach of or  constitute a default
under the  instruments and documents under which DACOM is organized and by which
DACOM is governed; and

         12.3.  Government  Regulation.  Except for  authorizations for overseas
investments  from the Bank of Korea and the Korean Ministry of Information,  the
terms and  conditions of this  Agreement,  including  the payments  provided for
herein,  are not  subject  to  regulation  or  review  by or  consent  from  any
governmental  or  administrative  agency in Korea to which DACOM is subject.  No
such   governmental  or   administrative   agency  can  require  the  amendment,
modification  or  supplementation  of this  Agreement  without the prior written
consent of Orion.  DACOM will advise Orion of DACOM's  progress toward obtaining
the  necessary  approvals  of the  Bank of  Korea  and the  Korean  Ministry  of
Information and any final decisions thereon.


                                   ARTICLE 13.

                       COORDINATION; GOVERNMENT APPROVALS
                       ----------------------------------

         13.1.  Coordination.  Prior to the Commencement Date and throughout the
Term, Orion shall use reasonable  efforts to (i) coordinate the orbital location
of Orion  3,  (ii)  resolve  frequency  coordination  issues  with  governmental
agencies having  jurisdiction  over the operation of Orion 3 or having claims of
interference  by Orion 3 with other  existing or planned  satellites,  and (iii)
maintain  Orion  3  in  the  orbital  location  specified  herein  so  that  the
Transponders   will  comply  in  all  material   respects   with  the  Technical
Specifications  at all times.  In connection with its  coordination  activities,
Orion shall use reasonable efforts to coordinate uplink frequencies of _____ GHz
to ____  GHz and  downlink  frequencies  of  _____  GHz to ____  GHz so that the
Transponders  may operate on such  frequencies.  Orion shall notify DACOM of the
frequencies on which the  Transponders  will operate on or before June 30, 1997.
Upon the request of Orion,  DACOM shall assist Orion in obtaining the support of
the  government  of the  Republic  of Korea to  assist  in the  coordination  or
consultation  of Orion 3 and the  frequencies  on which  the  Transponders  will
operate,  all in accordance with ITU regulations  and the INTELSAT  Treaty.  Any
consultation  with  INTELSAT  regarding  the  operation  of  Orion 3 will be the
responsibility of Orion as Orion deems appropriate.

         13.2.  Government  Approvals.  DACOM shall be responsible for obtaining
any  authorizations or approvals from the Government of the Republic of Korea as
may be necessary  for DACOM to enter into this  Agreement,  to obtain  necessary
financing  for the  transaction  and to transfer any funds  required  hereunder.
DACOM  and  its  Permitted   Users  shall  be  responsible   for  obtaining  any
governmental  approvals or  authorizations  necessary to transmit to Orion 3 and
the  Transponders  from any country and to receive and  distribute  any material
transmitted over the Transponders in any country.  Upon DACOM's request,  and to
the extent feasible,  Orion will assist DACOM in obtaining any such approvals or
authorizations.


                                      -19-
<PAGE>
                                   ARTICLE 14.

                   LIMITATION OF LIABILITY AND INDEMNIFICATION
                   -------------------------------------------

         14.1.  Force Majeure.  Neither Party shall be liable to the other Party
for any failure of performance hereunder (except for the obligation to pay money
when due) due to acts of God, fire,  flood,  weather,  receive earth station sun
outage or other  catastrophes,  national  emergencies,  insurrections,  riots or
wars, strikes,  lockouts, work stoppages or other labor difficulties,  or due to
any law, order, regulation,  direction,  action or request of any government, or
of  any   department,   agency,   commission,   bureau,   corporation  or  other
instrumentality  of any government,  or of any civil or military  authority.  If
Force Majeure is claimed by either Party, such Party shall provide prompt notice
to the other Party of both the  commencement  and cessation  dates of such Force
Majeure event.  The occurrence of a Force Majeure shall not entitle DACOM to any
refunds of Joint Investment Amounts hereunder or to any other remedy whatsoever,
except for a refund if Orion  terminates  for Force Majeure  pursuant to Section
10.2(d).

         14.2.  Consequential  Damages. In no event shall either Party be liable
for any indirect,  incidental or consequential  damages,  whether foreseeable or
not,  occasioned by any defect in Orion 3 or the  Transponders,  delay in making
available the Transponders, failure of the Transponders to perform, or any other
cause whatsoever.

         14.3.  Remedies.  The remedies of each Party for nonperformance of this
Agreement  by the other Party shall be limited to those  specifically  set forth
herein, and there shall be no other remedies.


                                   ARTICLE 15.

                                 INDEMNIFICATION
                                 ---------------

         15.1.  Indemnification  by DACOM.  DACOM shall indemnify and hold Orion
and its shareholders, officers, directors, agents, employees and assigns, or any
of them,  whether acting  through Orion or otherwise,  harmless from and against
any  and  all  claims,  liabilities,   expenses,   assessments,   judgments  and
recoveries,  including  attorneys' fees,  incurred by any of them and occasioned
by,  arising  out of or  resulting  from  (i) any  claims  for  libel,  slander,
infringement  of  copyright  or any  other  matter  arising  from  the  material
transmitted by DACOM or a Permitted User over Orion 3 or the  Transponders,  and
(ii) the willful  misconduct of DACOM or a Permitted User relating to use of any
Transponder.

         15.2.  Indemnification  by ORION.  Orion shall indemnify and hold DACOM
and its shareholders, officers, directors, agents, employees and assigns, or any
of them,  whether acting  through DACOM or otherwise,  harmless from and against
any  and  all  claims,  liabilities,   expenses,   assessments,   judgments  and
recoveries,  including  attorneys' fees,  incurred by any of them and occasioned
by, arising out of or resulting from the willful misconduct of Orion relating to
its operation of the Orion 3 satellite.



                                      -20-
<PAGE>



15.3.  Procedure  For  Indemnification.  In the event of a claim with respect to
which a Party is entitled to indemnification hereunder, such Party ("Indemnified
Party") shall notify the other Party  ("Indemnifying  Party") in writing as soon
as  practicable,  but in no event later than fifteen (15) days after  receipt of
such claim;  provided  that a delay in giving such notice shall not preclude the
Indemnified Party from seeking  indemnification  hereunder if such delay has not
materially prejudiced the Indemnifying Party's ability to defend such claim. The
Indemnifying  Party  shall  promptly  defend  such claim (by  counsel of its own
choosing  and  reasonably   satisfactory  to  the  Indemnified  Party)  and  the
Indemnified Party shall reasonably  cooperate with the Indemnifying Party in the
defense  of such  claim,  including  the  settlement  of the matter on the basis
stipulated  by  the  Indemnifying  Party  (with  the  Indemnifying  Party  being
responsible  for all costs and expenses of such  settlement  and the  reasonable
out-of-pocket expenses incurred by the Indemnified Party in cooperating with the
Indemnifying  Party),  subject to the  limitations  on  settlement  described in
subparagraphs  (a) and (b) below. If a conflict of interest exists vis-a-vis the
interests of the Indemnifying  Party and the Indemnified  Party, the Indemnified
Party shall (i) be entitled to defend the claim,  suit,  or action or proceeding
at the expense of, for the account of and at the risk of the Indemnifying Party;
(ii)  engage  counsel  of  its  own  choosing   reasonably   acceptable  to  the
Indemnifying Party, and at the expense of, for the account of and at the risk of
the Indemnifying  Party;  (iii) take reasonable steps to monitor and control the
fees and  costs of  counsel  so  chosen;  and (iv) keep the  Indemnifying  Party
reasonably informed of the status of such defense,  including without limitation
any settlement  proposals by the claimant.  If the Indemnifying  Party, within a
reasonable time after notice of a claim,  fails to defend the Indemnified Party,
the Indemnified Party shall be entitled to undertake the defense,  compromise or
settlement  of such claim at the  expense of, for the account and at the risk of
Indemnifying Party. Upon the assumption by the Indemnifying Party of the defense
of such claim, the Indemnifying  Party may settle or compromise such claim as it
sees fit;  provided,  however,  that  anything in this  Section to the  contrary
notwithstanding:

                  (a)  Consent.  If there  is a  reasonable  probability  that a
settlement  or  compromise of a claim may  materially  and adversely  affect the
Indemnified Party, the Indemnifying Party shall not so settle or compromise such
claim without the consent of the Indemnified  Party,  which consent shall not be
unreasonably withheld; and

                  (b) Counterclaim.  If the facts giving rise to indemnification
hereunder  shall  involve a possible  claim by the  Indemnified  Party against a
third party,  the  Indemnified  Party shall have the right,  at its own cost and
expense, to undertake the prosecution, compromise, and settlement of such claim.



                                   ARTICLE 16.

                                  MISCELLANEOUS
                                  -------------

         16.1.  Further  Assurances.  DACOM and Orion shall take all appropriate
action and execute all  documents,  instruments or conveyances of any kind which
may be necessary or advisable to carry out any of the  provisions  hereof and to
consummate the transactions  contemplated  hereby.  Orion hereby agrees that (i)
the  Korean  National  Flag and  DACOM's  logo shall be affixed or marked on the
Orion 3 launching vehicle  conspicuous from the observation decks; (ii) the name
of Orion 3 in Korea shall

                                      -21-
<PAGE>



be Orion 3/DACOM, and such name may be used in documents and marketing materials
distributed in Korea;  (iii) throughout the Term, DACOM shall have the exclusive
right to use the Transponders for direct-to-home  satellite service in Korea and
Orion will not provide  comparable  transponders  on Orion 3 to any other entity
for the purpose of providing DTH service in Korea; (iv) Orion shall inform DACOM
of any matters related to the construction, launch and financing of Orion 3 that
would have a material  adverse effect on DACOM's rights to the  Transponders and
Spare Transponders  hereunder or delay of launch of Orion 3; and (v) Orion shall
deliver to DACOM Orion's form of warrant  containing  the terms set forth in the
letter attached hereto as Exhibit E.


         16.2.  Taxes and  Expenses.  Each Party hereto shall bear all taxes and
expenses incurred by such Party in connection with the negotiation, preparation,
execution and performance of this Agreement.

         16.3.  Press  Releases  and Public  Announcements.  Except as otherwise
required by law or by applicable rules of any securities exchange or association
of securities  dealers,  neither Party shall issue any press  release,  make any
public  announcement  or otherwise  disclose any  information for the purpose of
publication  by any print,  broadcast  or other  public  media,  relating to the
transactions  contemplated by this Agreement,  without the prior approval of the
other Party.

         16.4. Notices. All notices,  demands, claims,  requests,  undertakings,
consents,  opinions  and other  communications  which may or are  required to be
given  hereunder or with respect hereto shall be in writing,  and in the English
language,  shall  be  given  either  by  personal  delivery  or  by  established
international courier, charges prepaid, or by facsimile transmission,  and shall
be deemed to have been given or made when personally  delivered,  when delivered
to the courier  company,  charges  prepaid,  and when  transmitted by facsimile,
addressed to the respective parties as follows:

                  (a)      If to Orion:

                           Orion Asia Pacific Corp.
                           2440 Research Boulevard
                           Rockville, Maryland 20850
                           Attention:  Corporate Secretary
                           Fax:  301-258-3360

                           With copy to:

                           Reed Smith Shaw & McClay
                           1301 K Street, -
                           Washington, D.C. 20005
                           Attention:  Benjamin J. Griffin, Esq.
                           Fax:  202-414-9299

or to such other  address as Orion may from time to time  designate by notice to
DACOM with respect to future notices, demands and other communications to Orion;
or


                                      -22-
<PAGE>



                  (b)      If to DACOM:

                           DACOM Corp.
                           DACOM Building 65-228
                           3-GA, Hangang-Ro, Yongsan-Ku
                           Seoul, Korea
                           Attention:  Youn Woo Lee
                           Head of Satellite Communications Business Team
                           Fax:  82-2-220-0761

                           With copy to:

                           Bae, Kim & Lee
                           Shin-A Bldg, 39-1 Seosomun-Dong
                           Chung-Ku, Seoul, 100-752
                           Korea
                           Attention:  Suk Jin Chon, Esq.
                           Fax:  82-2-755-7676

or to such other  address as DACOM may from time to time  designate by notice to
Orion with respect to future notices, demands and other communications to DACOM.

         Notwithstanding  the  foregoing,  notices  required under Sections 6.1,
8.4,  9.2,  and 9.3 of this  Agreement  shall  be  deemed  to be duly  given  by
telephone  notice,  provided  written  confirmation is received within three (3)
days thereafter.

         16.5. No Third-Party Beneficiaries. This Agreement shall not confer any
rights or remedies upon any person other than the Parties to this  Agreement and
their  respective  successors  and permitted  assigns,  and shall not create the
relationship  of  principal  and  agent,  partnership  or joint  venture  or any
fiduciary relationship between DACOM and Orion.

         16.6.    Governing Law; Arbitration.

                  (a)  Governing  Law. This  Agreement  shall be governed by and
construed in accordance with the laws of the State of New York, U.S.A.,  without
giving effect to any choice or conflict of law provision or rule (whether of the
State of New York or any other jurisdiction) that would cause the application of
the laws of any jurisdiction other than the State of New York.

                  (b)  Arbitration.  All disputes,  controversies or differences
which may arise between the Parties, out of, or in relation to, or in connection
with this  Agreement,  or for the breach  thereof,  shall be finally  settled by
arbitration  in  Vancouver,   Canada,  in  accordance  with  the  rules  of  the
International  Chamber of Commerce.  The award rendered by the three arbitrators
shall be final and binding upon both Parties concerned.

         16.7.  Amendments  and Waivers.  No amendment of any  provision of this
Agreement,  and no  postponement  or  waiver  of any  such  provision  or of any
default, misrepresentation, or breach of warranty or covenant hereunder, whether
intentional or not, shall be valid unless such amendment, postponement or waiver
is in writing and

                                      -23-
<PAGE>



signed by or on behalf of Orion and DACOM.  No such  amendment,  postponement or
waiver shall be deemed to extend to any prior or subsequent  matter,  whether or
not similar to the subject-matter of such amendment,  postponement or waiver. No
failure or delay on the part of Orion or DACOM in exercising any right, power or
privilege  under this Agreement  shall operate as a waiver thereof nor shall any
single or partial exercise of any right,  power or privilege  hereunder preclude
any other or further exercise thereof or the exercise of any other right,  power
or privilege.

         16.8.  Succession and Assignment.  This Agreement shall be binding upon
and inure to the  benefit of the  Parties and their  respective  successors  and
permitted  assigns.  Neither  Party may  assign  this  Agreement  or any of such
Party's rights, interests or obligations hereunder without the prior approval of
the other Party hereto except that either Party may (a) assign any or all of its
rights and interests  hereunder to one or more of its  affiliates or to a lender
or other person providing  financing to such Party, (b) designate one or more of
its affiliates to perform its  obligations  hereunder;  and (c) DACOM may assign
its  rights to use the  Transponders  or  sublease  such  Transponders  to third
parties who shall be obligated to use the  Transponders  in accordance with this
Agreement, except that in any event the assigning Party shall remain responsible
for the  performance,  by  itself  or its  assignee,  of all of its  obligations
hereunder. Orion shall notify DACOM upon the occurrence of any change of control
of Orion  Network  Systems,  Inc.  For  purposes of the  foregoing,  a change of
control  shall mean that at least thirty  percent  (30%) of the voting equity of
Orion  Network  Systems,  Inc.  becomes held by an individual  shareholder  or a
control  group  of  shareholders  that  are  not  currently   controlling  group
shareholders of Orion Network Systems, Inc.

         16.9.  Confidentiality.  Each Party shall treat as confidential  all of
the  Confidential  Information,  refrain  from  using  any of  the  Confidential
Information  except in connection with this Agreement,  and deliver  promptly to
the other Party or  destroy,  at the request of the other  Party,  all  tangible
embodiments, including all copies thereof, of the Confidential Information which
are within the possession or control of such Party. If either Party is requested
or required  (by oral  question or request for  information  or documents in any
legal proceeding, interrogatory, subpoena, civil investigative demand or similar
process) to disclose any Confidential  Information,  such Party shall notify the
other Party  promptly of such request or requirement so that the other Party may
seek an appropriate  protective order or waive compliance with the provisions of
this  Section  16.9.  If, in the absence of such a  protective  order or waiver,
either  Party  is,  on  the  advice  of  counsel,   compelled  to  disclose  any
Confidential  Information  to any tribunal or else be liable for contempt,  such
Party may disclose such  Confidential  Information to such  tribunal;  provided,
however,  that the  disclosing  Party  shall use such  Party's  best  efforts to
obtain,  at the  request  and  expense  of the  other  Party,  an order or other
assurance  that  confidential  treatment will be accorded to such portion of the
Confidential  Information  required  to be  disclosed  as the other  Party shall
designate. For purposes of this Section 16.9,  "Confidential  Information" means
any  information  concerning the business and affairs of DACOM or Orion or their
respective affiliates that is not already generally available to the public. The
Parties recognize that Orion's filing of this Agreement,  including the Exhibits
hereto,  with the  United  States  Securities  and  Exchange  Commission  may be
required  by law.  Such filing  shall not be subject to or a  violation  of this
Section 16.9.


                                      -24-
<PAGE>



         16.10. Matters of Construction, Interpretation and the Like.

                  (a) Construction. Orion and DACOM have participated jointly in
the negotiation  and drafting of this Agreement.  If an ambiguity or question of
intent or interpretation arises, this Agreement shall be construed as if drafted
jointly  by both  Parties  and no  presumption  or burden of proof  shall  arise
favoring or  disfavoring  either Party  because of the  authorship of any of the
provisions of this  Agreement.  Any reference to any law shall be deemed also to
refer to all  rules,  regulations,  orders or  decrees  promulgated  thereunder,
unless the context requires otherwise. The word "including" shall mean including
without limitation. Each representation,  warranty and covenant contained herein
shall have independent significance. If either Party breaches in any respect any
representation,  warranty,  covenant  or other  obligation  contained  herein or
created  hereby,  the fact that there exists  another  representation,  warranty
covenant or obligation  relating to the same subject  matter  (regardless of the
relative  levels of  specificity)  which has not been breached shall not detract
from or mitigate the consequences of such breach. The Exhibits specified in this
Agreement  are  incorporated  herein by reference  and made a part  hereof.  The
article  and  section  headings  hereof are for  convenience  only and shall not
affect the meaning or interpretation of this Agreement.  All representations and
warranties in this  Agreement  shall  survive for the duration of the Term.  The
English language version of this Agreement is controlling.

                  (b) Severability. The invalidity or unenforceability of one or
more of the  provisions of this  Agreement in any situation in any  jurisdiction
shall not affect the validity or enforceability of any other provision hereof or
the validity or enforceability of the offending provision in any other situation
or jurisdiction.

                  (c) Entire  Agreement;  Counterparts.  This Agreement (and the
other documents referred to herein) constitutes the entire agreement between the
Parties and supersedes any prior  understandings,  agreements or representations
by or among the  Parties,  written  or oral,  to the extent  they  relate to the
subject  matter  hereof.   This  Agreement  may  be  executed  in  one  or  more
counterparts,  each of  which  shall  be  deemed  an  original  but all of which
together shall constitute one and the same instrument. It shall not be necessary
in making  proof of this  Agreement to produce or account for more than one such
counterpart.







                                    / / / / /

                                      -25-
<PAGE>




         16.11. Compliance.  The Parties acknowledge that their participation in
matters  specified  herein  shall be  subject  to  applicable  laws,  rules  and
regulations, including those affecting technology transfer and export controls.

         16.12.  Registration.  DACOM  reserves the right,  at its  expense,  to
register this Agreement in any jurisdiction.


         WITNESS  the due  execution  hereof as of the day and year first  above
written.


ORION ASIA PACIFIC CORP.                    DACOM CORP.



By:           /s/                           By:          /s/
     --------------------------                 -------------------------------
     W. Neil Bauer                              Kwak, Chi-Young
     Chief Executive Officer                    Senior Executive Vice President

Date:                                       Date:
      -------------------------                   -----------------------------


                                      -26-
<PAGE>




                                    EXHIBIT A





                                                      Confidential Treatment has
                                                      been requested for this 
                                                      entire exhibit.




                             ORION ACCESS PROCEDURES


<PAGE>
                                   EXHIBIT A

                               Access Procedures

                                    for the

                             Orion Satellite System

                                  Version: 1.2
                                11 November 1996

<PAGE>



CONFIDENTIAL TREATMENT HAS BEEN REQUESTED FOR PAGES 33 TO 33 OF THIS DOCUMENT.

<PAGE>

                                    CONTENTS



SECTION                                                                    PAGE
- --------------------------------------------------------------------------------

1.0  INTRODUCTION..............................................................1
2.0  SUMMARY OF PROCEDURES TO ACCESS ORION SATELLITES..........................2
3.0  ORION'S RESPONSIBILITIES..................................................3
  3.1  Transmission Plan.......................................................3
  3.2  Telephone Contact and Coordintion.......................................4
4.0  RESPONSIBILITIES OF ALL SATELLITE USERS...................................4
  4.1  Obtain Contract via Orion Satellite Services Sales......................5
  4.2  Schedule Occasional-Use Access via Orion Satellite Services 
       Scheduling Office.......................................................5
  4.3  Identify Person Responsible for Uplink..................................5
  4.4  Complete and Forward the Earth Station Description Forms to Orion.......5
  4.5  Perform Initial Earth Station Performance Verification..................6
  4.6  Contact Orion Operations Center when Ready to Initiate Circuit..........7
  4.7  Maintain a Log of Transmitted Signals...................................7
  4.8  Notify Orion Operations Center prior to Cessation of Transmission.......7
  4.9  Retesting Earth Station Performance.....................................8
  4.10 Fault Isolation.........................................................8
  4.11 Cessation of Transmissio for Anomalous Conditions.......................8

APPENDIX 1:  DEFINITIONS.....................................................1-1
APPENDIX 2:  EARTH STATION PERFORMANCE REQUIREMENTS..........................2.1
  1.0  Scope.................................................................2-1
  1.1  Mandatory and Recommended Standards...................................2.1
  1.2  Requirements 7 Recommendations for RF Parameters......................2-2
  1.3  Frequency Band........................................................2-2
  1.4  Frequency Resolution..................................................2-2
  1.5  Polarization Angle Steerability.......................................2-2
  1.6  Transmit Cross Polarization Isolation.................................2.3
  1.7  Receive Cross Polariztion Isolation...................................2-3
  1.8  Maximum Emission Levels Outside Allocated Bandwidth...................2-3
  1.9  EIRP Stability and Control............................................2-3
  1.10 Earth Station Transmitter Termination.................................2-4
  1.11 Uplink Power Limits...................................................2-5
  1.12 Antenna Transmit Co-Polarized Sidelobe Pattern........................2-5
  1.13 Antenna Transmit Cross-Polarized Sidelobe Pattern.....................2-6
  1.14 Antenna Receive Co-Polarized Sidelobe Pattern.........................2-7
  1.15 Antenna Receive Cross-Polarized Sidelobe Pattern......................2-8
  1.16 Pointing Stability....................................................2-8
  1.17 Local Control and Monitoring..........................................2-8
APPENDIX 3:  EARTH STATION DESCRIPTION FORMS.................................3-1
APPENDIX 4:  SPECIFIC STEPS FOR CUSTOMERS ACCESSING THE ORION SATELLITE
             SYSTEM..........................................................4-1

- --------------------------------------------------------------------------------
                                    Page iii

<PAGE>
       Summary...............................................................4-1
       Steps Prior to Access.................................................4-1
       Steps to Access the Orion Satellite System............................4-2











- --------------------------------------------------------------------------------
                                    Page iv

<PAGE>





                                    EXHIBIT B




                                                      
                                                      
                                                      




                     TRANSPONDER PERFORMANCE SPECIFICATIONS


<PAGE>
                                    EXHIBIT B

                               ORION ASIA PACIFIC

                            TECHNICAL SPECIFICATION

                                      FOR

                               DACOM DTH PAYLOAD






                                    Issue 2.2
                           Revised: November 11, 1996





Signed:  /s/                      Date:
On Behalf of Orion Satellite Corporation


Signed: /s/                       Date:
On Behalf of DACOM Corporation


<PAGE>

                             


                                    EXHIBIT C









                              FORM LETTER OF CREDIT


<PAGE>





<PAGE>

                      IRREVOCABLE STANDBY LETTER OF CREDIT





                                             ISSUANCE DATE:
                                             CREDIT NUMBER:








Dear Sirs:

      1.  [Name of issuing Bank] (the "Bank") hereby establishes, in your favor,
at  the   request  and  for  the   account  of   __________________________,   a
_____________________  corporation at [Address] (the "Paying Party"), the Bank's
IRREVOCABLE  STANDBY  LETTER OF CREDIT NO. __ (this  "Letter of  Credit),  in an
amount not to exceed  _____________________  United States Dollars  (___________
USD) (such  amount,  as it may be reduced from time to time in  accordance  with
Section 3 hereof,  being called the "Maximum  Drawing  Amount").  This Letter of
Credit is being issued  pursuant to the JOINT  INVESTMENT  AGREEMENT dated as of
November 11, 1996 (the "Agreement"),  between DACOM CORP. and ORION ASIA PACIFIC
CORP.  This Letter of Credit is  effective  immediately  and will expire at 4:00
p.m.,  _______ time, on the earlier of (a) the date (the "Surrender  Date") upon
which  ____________  presents to the Bank a  certificate  in the form of Annex A
hereto or (b)  __________________________________________________  (the  "Expiry
Date") (the earlier of the Surrender  Date or the Expiry Date being  referred to
herein as the "Termination Date").

      2.  The Bank hereby irrevocably authorizes __________ to draw on the Bank,
in accordance with the terms and conditions hereinafter set forth, an amount not
in excess of the Maximum  Drawing  Amount on the date of such drawing (the "Date
of Drawing").

      3.  The Maximum Drawing Amount shall be  modified  from  time  to  time as
 follows:

          (a)    upon  payment by  the Bank of a  drawing hereunder, the Maximum
Drawing Amount applicable to each Date of Drawing subsequent to such payment but
prior  to the  first  day  after  the  next  succeeding  Modification  Date  (as
hereinafter  defined) shall be  automatically  reduced by an amount equal to the
amount of the drawing so paid.

      4.  Funds under this Letter of Credit are available to ___________ against
presentation of a draft of _____ in the form of Annex B hereto and a certificate

<PAGE>


signed  by  ____________  in the form of Annex C  hereto.  Each  such  draft and
certificate  shall be dated the date of  presentation  and shall be presented at
the Bank's office at [beneficiary's  country]  (telecopy No.  ___________).  The
Bank  agrees  that,  so long as this  Letter  of Credit  is in  effect,  it will
maintain an office in, or an arrangement reasonably  satisfactory to ___________
with a paying  bank  having an  office in  [beneficiary's  country]  where  such
presentation may be made. The aforesaid  drafts and certificates  shall have all
blanks appropriately completed,  shall be signed by a person purporting to be an
authorized  officer of _____________ and shall be either in the form of a letter
or a communication  by telecopier  delivered to the Bank. Any  communication  by
telecopier  pursuant  to which a drawing  is made  hereunder  shall be  promptly
confirmed to the Bank in writing.

      5.  The  Bank hereby agrees that all drafts drawn under the  terms of this
Letter of Credit will be duly honored by the Bank upon delivery, or transmission
by telecopier (promptly confirmed in writing),  of the draft and the certificate
as specified in Section 2 and if presented (by such delivery or transmission) at
our aforesaid  office on or before 4:00 p.m.,  ______ time,  on the  Termination
Date. If a drawing is made by _______ hereunder at or prior to 11:00 a.m., _____
time, on a Business Day (as hereinafter  defined),  and provided that such draft
and  certificate  presented  in  connection  therewith  conform to the terms and
conditions hereof,  payment shall be made of the amount specified in immediately
available  funds  not later  than  3:00  p.m.,  ____________  time,  on the same
Business Day. If a drawing is made by  __________________  hereunder after 11:00
a.m.,  ____________ time, and provided that such draft and certificate presented
in connection  therewith  conform to the terms and  conditions  hereof,  payment
shall be made of the amount  specified in immediately  available funds not later
than ____________  p.m.,  __________ time, on the next succeeding  Business Day.
Payment  under this Letter of Credit  shall be by wire  transfer of  immediately
available  funds to the  account  specified  in the the  draft.  As used in this
Letter of Credit,  "Business  Day" shall  mean any day,  other than a  Saturday,
Sunday or other day on which commercial banks in ______________,  __________ are
authorized by law to close.

      6.  Upon  receipt of  a draft  and certificate which are not in conformity
with terms and conditions of this Letter of Credit,  the Bank will promptly (and
in any event within one Business Day of such receipt) notify ___________ of such
nonconformity and the reason therefor.

      7.  Multiple drawings may be made hereunder.

      8.  Only ____________ may make drawings under this Letter of Credit.  Upon
payments as provided in Section 5 of the amount  specified in a draft hereunder,
the Bank shall be fully discharged of its obligation under this Letter of Credit
with respect to such draft.

      9.  Should the Expiry Date be a date prior to the time in which [payments]
[refunds]  covered by this Letter of Credit  could  potentially  be due from the
Paying  Party  under the  Agreement,  then at least 30 days  prior to the Expiry
Date, this Letter of Credit shall be replaced with a substitute Letter of Credit
in an equal Maximum Drawing Amount. If it is not so replaced,  then ____________
may draw upon this Letter of Credit in full.

      10. To  the  extent  not inconsistent  with the express terms hereof, this
Letter of Credit  shall be  governed by the Uniform  Customs  and  Practice  for
Documentary Credits

                                      -2-
<PAGE>

(revision  effective  October  1,  1984)   International   Chamber  of  Commerce
Publication No. 400.  Communications with respect to this Letter of Credit shall
be in writing or shall be  transmitted  by  telecopier  (promptly  confirmed  in
writing)  and  shall be  addressed  to the  Bank at  ___________________________
(telecopy No. ______________) and shall specifically refer to the number of this
Letter of Credit.

      11. Any drawing under this Letter of Credit will be paid  from the general
funds  of the Bank and not  directly  or  indirectly  from  funds or  collateral
deposited  with or for the  account  of the Bank by or on behalf  of the  Paying
Party,  or pledged  with or for the account of the Bank will seek  reimbursement
for payments  made  pursuant to a drawing under this Letter of Credit only after
such payments have been made.

      12. This Letter of Credit  sets  forth in full the Bank's undertaking, and
such undertaking shall not in anyway be modified,  amended, amplified or limited
by reference to any document, instrument or agreement referred to herein, except
only  Annexes  A, B and C, and the  notices  referred  to  herein;  and any such
reference  shall not be deemed to incorporate  herein by reference any document,
instrument or agreement except as set forth above.

                                   Very truly yours,

                                   [ISSUING BANK]




                                   By:_____________________________________
                                       [Title]





                                      -3-

<PAGE>


                                                                         ANNEX A




[ISSUING BANK]
[ADDRESS]

Attention:



Dear Sirs:

      Reference is made to that  certain  IRREVOCABLE  STANDBY  LETTER OF CREDIT
bearing Letter of Credit No. __________ dated [Date of Issuance], which has been
established by you in favor of ___________________________________________.

      The undersigned, a duly authorized representative of _____________, hereby
surrenders  the  Letter  of  Credit  for  immediate  cancellation  on  behalf of
__________________.

      The Letter or Credit is returned  herewith  and we request that you cancel
the Letter of Credit as of the date hereof.

      Capitalized  terms used herein and not  otherwise  defined  shall have the
meanings given to them in the Letter of Credit.



                                   _____________________________



                                   By:____________________________________
                                      [Name and Title of Authorized
                                       Representative of _____________]


<PAGE>


                                                                         ANNEX B



                                                  [Place]
                                                  [Date]



ON [Business Day of presentation if presented before ll:00 a.m.  (_______ time);
next Business Day if presented after 11:00 a.m.]



PAY TO: ________________________________          US$[not to exceed the
                                                    Maximum Drawing Amount]
                                                  DOLLARS



          [Insert wire instructions]



FOR VALUE RECEIVED AND CHARGE TO ACCOUNT OF LETTER OF CREDIT
NO. _________ OF ___________________________________

          [Issuing Bank]
          [Address]



                                           ________________________



                                           By:___________________________
                                              [Name and Title of Authorized
                                                Representative of _____________]


<PAGE>


                                                                         ANNEX C



                            CERTIFICATE FOR DRAWING



                The   undersigned,   a   duly   authorized   representative   of
__________________,  as a  beneficiary  under that certain  IRREVOCABLE  STANDBY
LETTER  OF  CREDIT  No.  ___________________,  dated  [the  Date  of  Issuance],
established  by [Issuing  Bank] (the "Bank")  (the  "Letter of Credit"),  hereby
certifies as follows:

      1.  A payment in the amount of US$ _________________________required to be
made to  _________________________by  the Paying Party pursuant to the Agreement
is overdue.

      2.  The  aggregate  amount  of  the accompanying draft does not exceed the
Maximum Drawing Amount.

          Capitalized  Terms  used herein and not otherwise defined herein shall
 have the meaning given to them in the Letter of Credit.

          IN  WITNESS  WHEREOF,  each  of  the  undersigned  has  executed  this
Certificate as of [Date].



                                             ____________________________




                                             By:________________________________
                                                [Name and Title of Authorized
                                                 Representative]


<PAGE>


                                    EXHIBIT D









                           OPERATIONAL REPORT ELEMENTS


<PAGE>







                                    EXHIBIT D

                           Operational Report Elements

The following reports will be provided on a quarterly basis by ORION.

1)       Health status of the satellite.

               o    Overall  health of the satellite.  

               o    Number,  frequency and type of maneuvers.

               o    Status  of  major  subsystems.  

               o    Number  and  type of configuration changes. 

               o    Fuel state and calculated life expectancy.

               o    Predicted events - eclipses; solar lunar and terrestrial.

               o    Unusual events or anomalies. 

               o    Current power bus margins.


2)       Status of the DACOM payload.

               o    Transponder status.

               o    TWT status.

               o    Receiver status.

               o    Status of spare equipment.

               o    Number and type of configuration changes.







<PAGE>







                                    EXHIBIT E









                             LETTER RE ORION WARRANT

<PAGE>
The portions of this Exhibit for which confidential treatment has been requested
are marked by brackets ([ ]). In addition,  an asterisk (*) appears in the right
hand margin of each  paragraph in which  confidential  information  is included.


[GRAPHIC OMITTED]
     ORION
     Network Systems, Inc.

                                           November 11, 1996



Mr. Chi-Young Kwak
Senior Executive Vice President
DACOM Corporation
140-716 DACOM Bldg. 65-228, 3GA
Hangang-Ro, Yongsan-Ku
Seoul, Korea

Dear Mr. Kwak:

     In the spirit of  cooperation  between Orion and Dacom and the execution of
the Joint Investment Agreement between our companies,  Orion intends, subject to
its Board of Directors' approval, to issue a Warrant to Dacom Corporation.  This
Warrant  will  entitle  Dacom to purchase up to 50,000  shares of Orion  Network
Systems,  Inc. common stock at a price of $14.00 per share.  The Warrant will be
exercisable  for a six (6)  month  period  beginning  six (6)  months  after the
Commencement Date, as defined in the Joint Investment Agreement,  and ending one
(1) year after  Commencement Date and will terminate at that time or at any time
the Joint Investment Agreement is terminated.

      We look  forward  to a  successful  and  rewarding  relationship  for both
companies.

                                             Yours truly,



                                             /s/ W. Neil Bauer

                                             W. Neil Bauer
                                             President & CEO


2440 Research Blvd., Suite 400 Rockville, MD 20850 (301) 258-8101

<PAGE>




                                                     November 11, 1996



        Mr. Youn Woo Lee
        Managing Director,
        Satellite Communication Business Team
        DACOM Corporation
        140-013 Sungji Bldg.
        40-712, 3-Ga, Hangang-Ro
        Yongsan-Ku,
        Seoul, Korea


                           Ref:  Joint Investment Agreement

        Dear Mr. Lee

        As you are aware,  today DACOM and Orion Asia  Pacific  entered into the
        Joint  Investment  Agreement for certain  specific  transponders  on the
        Orion 3 satellite  for a period of 13 years.  There is some  possibility
        that  the  Orion  3  lifetime  may be  extended  to one or  perhaps  two
        additional years.  Therefore,  I wish to extend to DACOM the opportunity
        to  acquire  the use of the  DACOM  transponders  covered  by the  Joint
        Investment Agreement ( the "Agreement") under certain  circumstances set
        forth herein.

        If Orion  determines  to operate Orion 3 for a year longer than the Term
        of the Joint Investment Agreement ( the "First Extended Term"), it shall
        so notify  DACOM at least  fourteen  (14) months prior to the end of the
        Term of the Agreement. DACOM shall have an option to continue to use the
        Transponders  for the First Extended Term;  provided that not later than
        twelve (12)  months  prior to the end of the Term,  DACOM  shall  notify
        Orion of its  election to use all the  Transponders  then  operating  in
        accordance  with the Technical  Specifications,  for the First  Extended
        Term. Ninety (90) days after such notice DACOM shall pay to Orion a cash
        sum  equal  to  the  number  of  said   operating   Transponders   times
        _______________________________ ____________________________. If, at any
        time during the twelve (12) month period of the first Extended Term, any
        of the  Transponders  for  which  DACOM has paid  becomes a  Transponder
        Failure and cannot be  restored,  Orion shall refund to DACOM the amount
        of ____________________ __________________________________________ times
        the number of quarters  (three (3) month  periods) then remaining in the
        First Extended Term, and DACOM shall surrender the failed Transponder to
        Orion.

        If Orion  determines to operate Orion 3 for a year longer than the First
        Extended Term, (the "Second  Extended  Term"),  Orion shall notify DACOM
        not  later  than ten (10) days  prior to the end of the Term.  Not later
        than the first day of the First Extended Term,  DACOM shall notify Orion
        of its election to use all the Transponders then operating in accordance
        with the  Technical  Specifications,  for the period of Second  Extended
        Term. Ninety (90) days 

<PAGE>




        after  such  notice  DACOM  shall  pay to Orion a cash sum  equal to the
        number of said operating  Transponders times  __________________________
        ______________________________.  If,  at  any  time  during  the  Second
        Extended Term, any of the  Transponders for which DACOM has paid becomes
        a  Transponder  Failure and cannot be  restored,  Orion shall  refund to
        DACOM     the     amount     of     ____________________________________
        ___________________  times  the  number  of  quarters  (three  (3) month
        periods) then  remaining in the Second  Extended  Term,  and DACOM shall
        surrender the failed Transponder to Orion.

        If DACOM does not  provide  the  notices  and pay the  amounts set forth
        hereinabove Orion shall be relieved of any obligation to permit DACOM to
        use the Transponders and Spare Transponders for the applicable  Extended
        Term.

        If you  have  any  questions  regarding  the  foregoing,  please  do not
        hesitate  calling.  If you concur in the  proposed  arrangement,  please
        execute a copy of this letter in the space provided.


                                   Sincerely,




                                   Hans Giner
                                   President
                                   Orion Asia Pacific



        I accept the foregoing:

        November 11, 1996
        DACOM Corporation


        By _________________
             Lee, Youn Woo
             Managing Director,
             Satellite Communication Business Team







                                                                       Exhibit 1
                           ORION NETWORK SYSTEMS, INC.
                     NON-EMPLOYEE DIRECTOR STOCK OPTION PLAN


                  ORION  NETWORK  SYSTEMS,  INC.,  a Delaware  corporation  (the
"Corporation"),  sets forth herein the terms of the Non-Employee  Director Stock
Option Plan (the "Plan") as follows:


1.                PURPOSE

                  1.1 The  Plan is  intended  to  attract  and  retain  the best
possible  members of the Board and to  provide  additional  incentives  to those
directors to promote the success of the Corporation.  The Plan provides Eligible
Directors an opportunity to purchase shares of the Stock pursuant to Options. No
stock  option  granted  under the Plan is  intended  to be an  "incentive  stock
option" within the meaning of Section 422 of the Internal  Revenue Code of 1986,
or the  corresponding  provision of any  subsequently  enacted tax  statute,  as
amended from time to time. In addition,  the Prior Options are hereby  confirmed
and incorporated into the Plan.

                  1.2 The Plan is intended to  constitute  a "formula  plan" and
Eligible  Directors are intended to be "disinterested  administrators"  of other
plans  maintained  by the  Corporation  for  purposes  of Rule  16b-3  under the
Exchange Act.


2.                DEFINITIONS

                  For purposes of  interpreting  the Plan and related  documents
(including Stock Option Agreements), the following definitions shall apply:

                  2.1.  "Additional  Option"  means  any  Option  other  than an
Initial Option or a Prior Option.

                  2.2.  "Administrator"  means the Secretary of the  Corporation
or, as to any State  where any  other  person is  registered  as an agent of the
Corporation  for the sale of securities,  such other person with respect to such
State,  or (in either  case) such other  person as is  appointed by the Board to
serve as Administrator.

                  2.3.  "Anniversary  Date" means the date of the annual meeting
of the shareholders of the Corporation at which Directors are elected.

                  2.4. "Board" means the board of directors of the Corporation.

                  2.5.  "Code"  means  the  Internal  Revenue  Code of 1986,  as
amended.

                  2.6.  "Commencement  of Service" means the date of election or
appointment of an Eligible Director to his or her first term as a Director.

                  2.7.  "Corporation"  means  Orion  Network  Systems,  Inc.,  a
Delaware corporation.

                  2.8. "Current  Eligible  Director" means a member of the Board
who is not an officer or employee of the Corporation or any of its  subsidiaries
and who received a grant of a Prior Option prior to the Effective Date.

                  2.9.  "Effective  Date" means the date of adoption of the Plan
by the Board.



<PAGE>



                  2.10.  "Eligible  Director" means a member of the Board who is
not an officer or employee of
the Corporation or any of its subsidiaries.

                  2.11.  "Exchange  Act" means the  Securities  Exchange  Act of
1934, as now in effect or hereafter amended.

                  2.12.  "Exercise  Price" means the Option Price  multiplied by
the number of shares of Stock purchased pursuant to exercise of an Option.

                  2.13.  "Expiration  Date" means the fifth  anniversary  of the
Grant Date or, if earlier,  the  termination  of the Option  pursuant to Section
4.2(c) hereof.

                  2.14.  "Fair  Market  Value"  means the value of each share of
Stock subject to the Plan  determined as follows:  If on the Grant Date or other
determination  date the Stock is listed on an  established  national or regional
stock  exchange,  is  admitted  to  quotation  on the  National  Association  of
Securities  Dealers  Automated  Quotation  System,  or is publicly  traded on an
established  securities  market, the Fair Market Value of the Stock shall be the
average  closing  price of the Stock on such exchange or in such market over the
twenty  (20)  trading  days  immediately  preceding  the  Grant  Date  or  other
determination  date. If there is more than one such exchange or market, then the
closing  price of the Stock on each day  shall be the  highest  of the  multiple
closing prices.  If the Stock is not listed on such an exchange,  quoted on such
system or traded on such a market,  Fair Market Value shall be determined by the
Administrator in good faith.

                  2.15.  "Grant  Date"  means the date on which an Option  grant
takes effect pursuant to Section 7 hereof.

                  2.16.  "Initial  Option"  means  an  Option  received  by each
Eligible  Director  as of the  Effective  Date or  thereafter  as of an Eligible
Director's Commencement of Service.

                  2.17. "New Eligible  Director" means a member of the Board who
is not an officer or employee of the Corporation or any of its  subsidiaries and
who is not a Current Eligible Director.

                  2.18. "Option" means any option to purchase one or more shares
of Stock pursuant to the Plan,  including Prior Options,  Initial  Options,  and
Additional Options.

                  2.19.  "Optionee"  means an  Eligible  Director  who  holds an
Option.

                  2.20.  "Option  Period"  means the period during which Options
may be exercised as defined in Section 9 hereof.

                  2.21.  "Option  Price" means the purchase price for each share
of Stock subject to an Option.

                  2.22.  "Prior  Option"  means each Option to  purchase  10,000
shares of Stock granted by the  Corporation  to each Current  Eligible  Director
prior to the Effective Date.

                  2.23.  "Reelection  Date"  means  the date of  election  of an
Eligible Director to a term as a Director, other than his or her first term.

                  2.24.  "Securities  Act" means the  Securities Act of 1933, as
now in effect or as hereafter amended.

                  2.25.  "Stock"  means the  Common  Stock  ($0.01 par value per
share) of the Corporation.



<PAGE>



                  2.26.  "Stock Option  Agreement"  means the written  agreement
evidencing grant of an Option hereunder.


3.                ADMINISTRATION

                  The  Plan  shall be  administered  by the  Administrator.  The
Administrator's  responsibilities  under the Plan shall be limited to taking all
legal actions  necessary to document the Options  provided  herein,  to maintain
appropriate  records and reports  regarding those Options,  and to take all acts
authorized or required by the Plan.


4.                STOCK SUBJECT TO THE PLAN

                  4.1.  There are 80,000  Prior  Options that are subject to the
Plan.  Initial Options and Additional  Options to purchase not more than 300,000
shares of Stock may be granted  under the Plan  (subject to increase as a result
of expiration,  termination or  cancellation of a Prior Option as provided below
in this Section). If any Option expires, terminates or is terminated or canceled
for any reason  before it is  exercised  in full,  the shares of Stock that were
subject to the  unexercised  portion of the Option shall be available for future
Options  granted under the Plan. If any Prior Option  expires,  terminates or is
terminated  or canceled  for any reason  before it is  exercised  in full,  then
additional  Initial  Options and  Additional  Options to purchase  the number of
shares of Stock that were subject to the unexercised portion of the Prior Option
may be granted under the Plan.

                  In the  aggregate,  Options to purchase  not more than 380,000
shares of Stock may be granted under the Plan.

                  4.2(a).  If the  outstanding  shares of Stock are increased or
decreased or changed into or exchanged for a different  number or kind of shares
or other  securities  of the  Corporation  by  reason  of any  recapitalization,
reclassification,  stock  split-up,  combination of shares,  exchange of shares,
stock dividend or other distribution payable on capital stock, or other increase
or decrease in such shares  effected  without  receipt of  consideration  by the
Corporation,  occurring after the Effective Date, the number and kinds of shares
for the  purchase  of which  Options  may be  granted  under  the Plan  shall be
adjusted  proportionately and accordingly by the Corporation.  In addition,  the
number and kind of shares for which  Options are  outstanding  shall be adjusted
proportionately and accordingly so that the proportionate interest of the holder
of the Option immediately following such event shall, to the extent practicable,
be the  same as  immediately  prior  to  such  event.  Any  such  adjustment  in
outstanding  Options  shall not change the  aggregate  Option Price payable with
respect to shares subject to the unexercised  portion of the Option  outstanding
but shall include a corresponding  proportionate  adjustment in the Option Price
per share.

                  4.2(b).  Subject to Section 4.2(c) hereof,  if the Corporation
shall  be  the  surviving   corporation   in  any   reorganization,   merger  or
consolidation of the Corporation with one or more other corporations, any Option
theretofore  granted  pursuant  to the Plan  shall  pertain  to and apply to the
securities  to which a holder of the  number of shares of Stock  subject to such
Option  would have been  entitled  immediately  following  such  reorganization,
merger or consolidation,  with a corresponding  proportionate  adjustment of the
Option Price per share so that the aggregate  Option Price  thereafter  shall be
the same as the aggregate  Option Price of the shares  remaining  subject to the
Option immediately prior to such reorganization, merger or consolidation.

                  4.2(c).   Upon  the   dissolution   or   liquidation   of  the
Corporation,   or  upon  a  merger,   consolidation  or  reorganization  of  the
Corporation with one or more other  corporations in which the Corporation is not
the surviving corporation,  or upon a sale of substantially all of the assets of
the  Corporation to another  corporation,  or upon any  transaction  (including,
without limitation, a merger

<PAGE>



                  or  reorganization  in which the  Corporation is the surviving
corporation)  approved by the Board which results in any person or entity owning
80 percent or more of the  combined  voting power of all classes of stock of the
Corporation,  the Plan and all Options  outstanding  hereunder shall  terminate,
except to the  extent  provision  is made in  writing  in  connection  with such
transaction  for the  continuation  of the Plan,  the  assumption of the Options
theretofore  granted,  or for the  substitution  for such Options of new options
covering  the  stock  of a  successor  corporation,  or a parent  or  subsidiary
thereof,  with appropriate  adjustments as to the number and kinds of shares and
exercise prices, in which event the Plan (if applicable) and Options theretofore
granted  shall  continue in the manner and under the terms so  provided.  In the
event of any such termination of the Plan and Options,  each individual  holding
an Option  shall  have the right  immediately  prior to the  occurrence  of such
termination and during such period  occurring  prior to such  termination as the
Board in its sole  discretion  shall  determine and designate,  to exercise such
Option to the extent that such Option was otherwise exercisable at the time such
termination occurs. The Administrator shall send written notice of an event that
will result in such a termination to all  individuals who hold Options not later
than the time at which the Corporation gives notice thereof to its stockholders.

                  4.2(d). Adjustments under this Section 4.2 related to stock or
securities  of  the  Corporation  shall  be  made  by the  Administrator,  whose
determination  in that  respect  shall be final and  conclusive.  No  fractional
shares of Stock or units of other  securities  shall be issued  pursuant  to any
such adjustment,  and any fractions  resulting from any such adjustment shall be
eliminated in each case by rounding downward to the nearest whole share or unit.

                  4.2(e).  The grant of an Option pursuant to the Plan shall not
affect  or limit  in any way the  right  or  power  of the  Corporation  to make
adjustments,  reclassifications,  reorganizations  or changes of its  capital or
business structure or to merge,  consolidate,  dissolve or liquidate, or to sell
or transfer all of any part of its business or assets.


5.                ELIGIBILITY

                  Eligibility under the Plan is limited to Eligible Directors.


6.                OPTION PRICE

                  The Option Price of the Stock  covered by each Option  granted
under the Plan shall be the greater of the Fair Market Value or the par value of
such Stock on the Grant Date. The Option Price shall be subject to adjustment as
provided in Section 4.2 hereof.


7.                NUMBER OF SHARES AND GRANT DATES

                  7.1  Each  Current  Eligible  Director  has  received  a Prior
Option,  granted  January 17, 1996 (subject to occurrence of the Effective Date,
but with a Grant Date of January 17, 1996). Each Current Eligible Director shall
be annually  granted an Additional  Option to purchase 10,000 shares of Stock as
of the day after each Anniversary Date if the Eligible Director  continues to be
an Eligible Director on the day after such Anniversary Date.

                  7.2 Each New  Eligible  Director  serving  on the Board on the
Effective Date and each New Eligible  Director whose  Commencement of Service is
after the Effective Date shall be granted an Initial Option, as of the Effective
Date or as of the day after the New Eligible Director's Commencement of Service,
respectively,  to purchase the number of shares of Stock equal to (i) the number
of complete and partial  years in the term to which such New  Eligible  Director
was elected or appointed, multiplied by (ii) 10,000.



<PAGE>



                  Each New Eligible  Director also shall be annually  granted an
Additional  Option to purchase  10,000 shares of Stock as of each of (i) the day
after the New Eligible  Director's  first Reelection Date and (ii) the day after
each Anniversary Date after the New Eligible Director's first Reelection Date if
the New Eligible  Director  continues  to be a New Eligible  Director on the day
after such Anniversary Date.


8.                VESTING OF OPTIONS

                  The Optionee may exercise each Option granted to such Optionee
in  installments  as follows:  on the first  Anniversary  Date after the date of
grant of the  Option  as set  forth in  Section  7 above,  the  Option  shall be
exercisable in respect of 10,000  shares,  and, in the case of an Initial Option
which is an Option to purchase of more than 10,000  shares,  the Option shall be
exercisable in respect of an additional 10,000 shares on the second  Anniversary
Dates  after  the date of grant  and (if the  Initial  Option  is an  Option  to
purchase of more than 20,000  shares) on the third  Anniversary  Dates after the
date of  grant,  in each case as set forth in  Section  7 above.  The  foregoing
installments,  to the extent not exercised, shall accumulate and be exercisable,
in whole  or in  part,  at any  time  and  from  time to  time,  after  becoming
exercisable and prior to the termination of the Option; provided, that no single
exercise of the Option  shall be for less than 100 shares,  unless the number of
shares  purchased is the total number at the time  available for purchase  under
this Option.

                  Upon the termination of service (a "Service  Termination")  of
the Optionee in all capacities as an employee and/or director of the Corporation
and all of its affiliated companies,  any Option granted to an Optionee pursuant
to the Plan shall terminate to the extent it is not then  exercisable,  and such
Optionee  shall have no further right to purchase  shares of Stock to the extent
of such termination.


9.                OPTION PERIOD

                  An Option shall be exercisable  only during the Option Period.
The Option Period shall commence on the date of grant, as set forth in Section 7
above,  and shall end at the close of business on the fifth  anniversary  of the
date of grant.  An Optionee  shall have no further  right to purchase  shares of
Stock after the end of the Option Period.


10.               TIMING AND METHOD OF EXERCISE

                  Subject to Sections 8 and 9 hereof,  an  Optionee  may, at any
time,  exercise an Option with respect to all or any part of the shares of Stock
then  subject  to such  Option  by  giving  the  Corporation  written  notice of
exercise,  specifying  the  number of  shares  as to which  the  Option is being
exercised.   Such  notice  shall  be  addressed  to  the  Administrator  at  the
Corporation's  principal  office,  and shall be effective when actually received
(by personal delivery, fax or other delivery) by the Administrator.  Such notice
shall be accompanied by an amount equal to the Exercise Price of such shares, in
the form of any one or combination of the following:  cash or cash  equivalents,
or shares of Stock  valued at Fair  Market  Value in  accordance  with the Plan.
Shares of Stock  acquired by the Optionee  through  exercise of an Option may be
surrendered in payment of the Exercise Price of Options; provided, however, that
any Stock  surrendered  in payment  must have been (a) held by the  Optionee for
more than six months at the time of surrender  or (b)  acquired  under an Option
granted not less than six months prior to the time of surrender. Payment in full
of the Exercise Price need not accompany the written notice of exercise provided
the notice directs that the Stock certificate or certificates for the shares for
which the Option is exercised be delivered to a licensed  broker  acceptable  to
the  Corporation as the agent for the  individual  exercising the Option and, at
the

<PAGE>



                  time such Stock certificate or certificates are delivered, the
broker tenders to the Corporation  cash (or cash  equivalents  acceptable to the
Corporation) equal to the Exercise Price.


11.               NO STOCKHOLDER RIGHTS UNDER OPTION

                  Neither an  Optionee  nor any person  entitled  to exercise an
Optionee's  rights in the event of an  Optionee's  death  shall  have any of the
rights of a stockholder with respect to the shares of Stock subject to an Option
except to the extent the  certificates  for such  shares  shall have been issued
upon the exercise of the Option.


12.               CONTINUATION OF SERVICE

                  Nothing in the Plan shall  confer upon any person any right to
continue as a member of the Board or  interfere in any way with the right of the
Corporation to terminate such relationship.


13.               STOCK OPTION AGREEMENT

                  Each Option granted pursuant to the Plan shall be evidenced by
a  written  Stock  Option  Agreement  notifying  the  Optionee  of the grant and
incorporating  the  terms of the  Plan.  The  Stock  Option  Agreement  shall be
executed by the Corporation and the Optionee.


14.               WITHHOLDING

                  The Corporation  shall have the right to withhold,  or require
an Optionee to remit to the  Corporation,  an amount  sufficient  to satisfy any
applicable  federal,  state or local  withholding tax requirements  imposed with
respect to exercise of Options.  To the extent permissible under applicable tax,
securities  and  other  laws,  the  Optionee  may  satisfy  a  tax   withholding
requirement  by directing the  Corporation to apply shares of Stock to which the
Optionee  is  entitled  as a result of the  exercise  of an  Option  to  satisfy
withholding requirements under this Section 14.


15.               NON-TRANSFERABILITY OF OPTIONS

                  Each  Option  granted  pursuant  to  the  Plan  shall,  during
Optionee's lifetime, be exercisable only by Optionee, and neither the Option nor
any right  thereunder  shall be transferable by the Optionee by operation of law
or  otherwise  other than by will or the laws of descent and  distribution,  and
shall not be pledged or  hypothecated  (by  operation  of law or  otherwise)  or
subject to execution, attachment or similar processes.


16.               USE OF PROCEEDS

                  The  proceeds  received  by the  Corporation  from the sale of
Stock pursuant to Options granted under the Plan shall constitute  general funds
of the Corporation.


17.              ADOPTION, AMENDMENT, SUSPENSION AND TERMINATION

                  17.1.  The Plan shall be  effective as of the date of adoption
by the Board,  subject to stockholders'  approval of the Plan within one year of
the Effective Date by a majority of the votes

<PAGE>



                  cast  at a  duly  held  meeting  of  the  stockholders  of the
Corporation at which a quorum  representing a majority of all outstanding  stock
is  present,  either  in person or by proxy,  and  voting on the  matter,  or by
written consent in accordance  with applicable  state law and the Certificate of
Incorporation  and Bylaws of the  Corporation and in a manner that satisfies the
requirements of Rule 16b-3(b) of the Exchange Act; provided,  however, that upon
approval of the Plan by the stockholders of the Corporation, all Options granted
under the Plan on or after the Effective Date shall be fully effective as if the
stockholders  of the Corporation had approved the Plan on the Effective Date. If
the stockholders fail to approve the Plan within one year of the Effective Date,
any Options granted hereunder shall be null, void and of no effect.

                  17.2.  Subject to the  limitation of Section 17.4 hereof,  the
Board may at any time suspend or terminate the Plan,  and may amend it from time
to time in such respects as the Board may deem advisable; provided, however, the
Board shall not amend the Plan in the following respects without the approval of
stockholders then sufficient to approve the Plan in the first instance:

                  (a) To  materially  increase the benefits  provided  under the
                      Plan;

                  (b) To  increase  the  maximum  number of shares  which may be
                      granted;

                  (c) To change the designation or class of persons  eligible to
                      receive Options under the Plan.

                  17.3. No Option may be granted  during any suspension or after
the termination of the Plan, and no amendment,  suspension or termination of the
Plan  shall,  without  the  Optionee's  consent,  alter or impair  any rights or
obligations under any Stock Option Agreement  previously  entered into under the
Plan.  The Plan  shall  terminate  ten years  after the  Effective  Date  unless
previously terminated pursuant to Section 4.2 hereof or by the Board pursuant to
this Section 17.

                  17.4.  Notwithstanding  the provisions of Section 17.2 hereof,
the Plan shall not be amended more than once in any six-month  period other than
to comport with changes in the Code, the Employee Retirement Income Security Act
of 1974, or the rules promulgated thereunder.


18.               SECURITIES LAWS

                  18.1. The  Corporation  shall not be required to sell or issue
any shares of Stock  under any  Option if the sale or  issuance  of such  shares
would  constitute a violation  by the  individual  exercising  the Option or the
Corporation  of any  provisions  of any law or  regulation  of any  governmental
authority,  including without limitation any federal or state securities laws or
regulations.  Specifically  in connection with the Securities Act, upon exercise
of any Option,  unless a registration  statement  under the Securities Act is in
effect  with  respect  to the  shares  of  Stock  covered  by such  Option,  the
Corporation  shall not be  required  to sell or issue  such  shares  unless  the
Administrator has received evidence  satisfactory to the Administrator  that the
holder of such Option may  acquire  such shares  pursuant to an  exemption  from
registration  under the Securities Act. Any  determination in this connection by
the Administrator shall be final and conclusive.  The Corporation may, but shall
in no event be obligated to, register any securities  covered hereby pursuant to
the  Securities  Act.  The  Corporation  shall  not be  obligated  to  take  any
affirmative  action in order to cause the  exercise of an Option or the issuance
of  shares  pursuant  thereto  to  comply  with  any  law or  regulation  of any
governmental  authority.  As to any  jurisdiction  that  expressly  imposes  the
requirement that an Option shall not be exercisable  unless and until the shares
of Stock  covered by such Option are  registered  or are subject to an available
exemption from registration, the exercise of such Option (under circumstances in
which the laws of such jurisdiction  apply) shall be deemed conditioned upon the
effectiveness of such registration or the availability of such an exemption.



<PAGE>



                  18.2.  The intent of the Plan is to qualify for the  exemption
provided by Rule 16b-3 under the  Exchange  Act. To the extent any  provision of
the Plan does not comply with the requirements of Rule 16b-3, it shall be deemed
inoperative  and shall not affect the  validity  of the Plan.  In the event Rule
16b-3 is revised or  replaced,  the  Administrator  may exercise  discretion  to
modify the Plan in any  respect  necessary  to satisfy the  requirements  of the
revised exemption or its replacement.


19.               INDEMNIFICATION

                  19.1.  To  the  extent   permitted  by  applicable   law,  the
Administrator  shall be indemnified and held harmless by the Corporation against
and from any and all loss,  cost,  liability or expense that may be imposed upon
or reasonably incurred by the Administrator in connection with or resulting from
any claim,  action, suit or proceeding to which the Administrator may be a party
or in which the  Administrator  may be involved by reason of any action taken or
failure to act under the Plan,  and against and from any and all amounts paid by
the Administrator  (with the  Corporation's  written approval) in the settlement
thereof,  or paid by the Administrator in satisfaction of a judgment in any such
action,  suit or  proceeding  except a  judgment  in  favor of the  Corporation;
subject,  however,  to the  conditions  that upon the  institution of any claim,
action,  suit or proceeding against the Administrator,  the Administrator  shall
give the  Corporation an opportunity in writing,  at its own expense,  to handle
and defend the same before the Administrator  undertakes to handle and defend it
on the Administrator's own behalf. The foregoing right of indemnification  shall
not be  exclusive  of any other  right to which such person may be entitled as a
matter of law or otherwise,  or any power the  Corporation may have to indemnify
the Administrator or hold the Administrator harmless.

                  19.2. The  Administrator  and each officer and employee of the
Corporation  shall be fully  justified in reasonably  relying or acting upon any
information  furnished in connection with the  administration of the Plan by the
Corporation or any employee of the Corporation. In no event shall any person who
is or shall  have been the  Administrator,  or an  officer  or  employee  of the
Corporation,  be liable for any determination  made or other action taken or any
omission  to act in  reliance  upon  any  such  information,  or for any  action
(including  furnishing of  information)  taken or any failure to act, if in good
faith.


20.               GOVERNING LAW

                  The validity,  interpretation  and effect of the Plan, and the
rights  of all  persons  hereunder,  shall  be  governed  by and  determined  in
accordance  with the  laws of  Delaware,  other  than the  choice  of law  rules
thereof.

                  The Plan was duly  adopted and  approved by the Board on March
20,  1996  and was duly  approved  by the  stockholders  of the  Corporation  on
________ __, 1996.




                                          --------------------------------------
                                          Richard H. Shay
                                          Secretary




           FIRST AMENDMENT TO SECTION 351 EXCHANGE AGREEMENT AND PLAN
           ----------------------------------------------------------
                                 OF CONVERSION
                                 -------------


                  THIS FIRST  AMENDMENT  TO SECTION 351 EXCHANGE  AGREEMENT  AND
PLAN OF CONVERSION  (this  "Amendment") is entered into as of December __, 1996,
by and among International Private Satellite Partners,  L.P., a Delaware limited
partnership  ("Orion  Atlantic");   Orion  Network  Systems,  Inc.,  a  Delaware
corporation  ("ONS");  Orion  Satellite  Corporation,   a  Delaware  corporation
("OrionSat");   and  each  of  the   following   entities:   British   Aerospace
Communications,  Inc., a Delaware corporation,  COM DEV Satellite Communications
Limited, a Canadian corporation,  Kingston Communications International Limited,
a company  incorporated  under the laws of England,  Lockheed Martin  Commercial
Launch  Services,  Inc.,  a Delaware  corporation,  MCN Sat US, Inc., a Delaware
corporation,   and  Trans  Atlantic  Satellite,  Inc.,  a  Delaware  corporation
(collectively,  the  "Exchanging  Partners")  under  the  Section  351  Exchange
Agreement and Plan of Conversion,  dated as of June __, 1996,  between and among
Orion  Atlantic,  ONS,  OrionSat  and the  Exchanging  Partners  (the  "Exchange
Agreement").

                  WHEREAS,  Orion  Atlantic,  ONS  and  OrionSat  are  currently
pursuing and will continue to pursue certain  financing  transactions  that were
contemplated by the Exchange  Agreement,  and the parties hereto desire to amend
the Exchange Agreement to extend potentially the termination date to provide for
the  possibility  that such financings will not be completed by January 30, 1997
and to refund certain payments.

                  NOW, THEREFORE,  for and in consideration of the foregoing and
of the mutual covenants and agreements hereinafter set forth, the parties hereto
agree as follows:


                  1.       CLOSING TERMINATION DATE EXTENSION

                           The  first   paragraph  of  Section  13.1(b)  of  the
Exchange Agreement is hereby amended to read in its entirety as follows:

                                    (b) by ONS and OrionSat or by the Exchanging
Partners  collectively  or (as to a  particular  Exchanging  Partner),  by  such
Exchanging  Partner,  by  written  notice of  termination  to the other  parties
hereto,  if the  Closing  has not  occurred  by April  30,  1997  (the  "Closing
Termination  Date");  provided,  however,  that the terminating  party is not in
breach of any  obligations  or agreements  hereunder that are causing any of the
conditions precedent to Closing not to be satisfied.

<PAGE>



                  2.       REFUND OF CERTAIN PAYMENTS

                           Section  3.2(c) of the  Exchange  Agreement is hereby
amended by adding, at the end thereof, the following:

                  Notwithstanding  the  foregoing  provisions  of  this  Section
3.2(c),  to the extent that amounts are paid by one or more Exchanging  Partners
(or  Affiliates  of such  Exchanging  Partners)  (i)  pursuant  to the  Capacity
Agreements and which are subject to being  refunded  under the Refund  Agreement
("Firm Capacity  Payments") during the Adjustment Period for obligations of such
Exchanging  Partners (or Affiliates) arising after January 29, 1997 and prior to
the Closing  Date,  and (ii)  pursuant  to the  Contingent  Capacity  Agreements
("Contingent Capacity Payments") during the Adjustment Period for obligations of
such Exchanging Partners (or Affiliates) arising after the date hereof and prior
to the Closing Date (collectively,  "Payments Subject to Refund"),  then if (and
only if) ONS or Newco completes a Bond Offering prior to the Closing Termination
Date,

                  (x) to the  extent  that  the  gross  proceeds  from  the Bond
Offering  (excluding  any  amounts  required  to be set aside or pledged for the
purpose  of  pre-funding  interest  payments)  for ONS or Newco,  plus the gross
proceeds from the sale of Convertible  Subordinated  Debentures to BAe and Matra
Marconi Space UK Limited ("Matra Marconi  Space") or their  Affiliates,  exceeds
the sum of (1) the amounts  necessary to effect the Credit Facility  Refinancing
and all other  obligations  relating  thereto  or arising  therefrom,  including
without  limitation  all principal and accrued  interest due with respect to the
Credit Facility and all breakage fees and costs arising from  termination of the
interest  rate  hedge  relating  to the  Credit  Facility,  (2)  $49.4  million,
representing  the proposed initial payments to be made by ONS or Newco under the
Orion 2  Satellite  Contract  and  related  Orion 2  Option  Agreement,  (3) $13
million,  representing  the  incentive  payments  that will be  payable to Matra
Marconi  Space or its  Affiliates  with  respect to Orion 1 upon or  immediately
following the Credit Facility  Refinancing,  (4) $3.5 million,  representing the
amounts that will be payable to STET upon or  immediately  following  the Credit
Facility Refinancing,  (5) an amount reasonably determined by ONS or Newco to be
necessary working capital for ONS or Newco to conduct  operations  following the
Bond Offering and other  transactions  (not to exceed $10 million),  and (6) the
costs and expenses of the Bond Offering, the Convertible  Subordinated Debenture
financings and related  transactions  (not to exceed $14.3 million),  the excess
(the  "Available  Funds")  shall be used to refund the  amounts of the  Payments
Subject to Refund to the respective  Exchanging  Partners at the Closing (or, if
such excess is not sufficient to refund all of the Payments Subject to Refund to
the respective  Exchanging Partners,  the Available Funds shall be used first to
refund  Contingent  Capacity Payments to the extent of such Available Funds, and
second to refund Firm Capacity Payments to the extent of any remaining Available
Funds,  in each  case  with  partial  refunds  to be made  pro  rata  among  the
Exchanging  Partners  in  proportion  to their  respective  applicable  

                                      -2-
<PAGE>

Payments  Subject to Refund),  and amounts so refunded  shall not be included in
clause (i)(A) of this Section 3.2(c); and

                  (y) any  portions  of the  Payments  Subject  to Refund not so
refunded to the respective  Exchanging Partners at the Closing shall be included
in clause  (i)(A) of this Section  3.2(c) as part of the  Adjustment  Amounts of
such Exchanging Partners.

                  The refund of Available Funds shall be made at or within three
business days after the Closing.  ONS and Newco shall deliver to the  Exchanging
Partners simultaneously with such refund a certificate of their respective chief
financial  officers  setting  forth in  reasonable  detail all  calculations  or
computations  required or  contemplated  by this Section  3.2(c),  including the
amount and  application  of the  Available  Funds.  ONS and Newco shall  provide
promptly,  to any Exchanging Partner requesting the same, such additional detail
supporting such  calculations  and  computations  and such back-up or supporting
documentation as such Exchanging Partner may reasonably request.


                  3.       TAX ADJUSTMENT

                  Section 3.2(c)(ii) of the Exchange Agreement is hereby amended
to read in its entirety as follows:

                  (ii)  the  product  of the  number  of days in the  Adjustment
Period through and including (but not beyond) January 29, 1997 multiplied by the
Tax Adjustment Factor for such Exchanging Partner, divided by

                  4.     SALE OF CONVERTIBLE SUBORDINATED DEBENTURES

                  Notwithstanding  the provisions of Section 5.8 of the Exchange
Agreement  contemplating  that Newco will,  as of the Closing  Date,  complete a
Convertible Subordinated Debenture Offering of approximately $100 million, it is
presently intended that the Convertible  Subordinated Debenture Offering consist
only of purchases of $50 million of Convertible  Subordinated  Debentures by BAe
and $10 million of Convertible  Subordinated  Debentures by Matra Marconi Space,
or Affiliates thereof.  Accordingly, all references in the Exchange Agreement to
the  Convertible  Subordinated  Debenture  Offering  shall refer only to the $60
million of Convertible  Subordinated Debentures to be purchased by BAe and Matra
Marconi Space, or Affiliates thereof.  While not intended to be legally binding,
BAe hereby  reconfirms  that it or its Affiliates  intend to purchase from Newco
$50 million of  Convertible  Subordinated  Debentures on terms being  negotiated
between BAe and ONS, and MCN Sat hereby confirms that Matra Marconi Space or its
Affiliates   intends  to  purchase   from  Newco  $10  million  of   Convertible
Subordinated  Debentures  on terms  substantially  the same as those  ultimately
agreed upon by 

                                      -3-
<PAGE>

BAe and ONS for the BAe  investment.  Section 10.8 of the Exchange  Agreement is
hereby amended to read in its entirety as follows:

                  Newco shall have raised at least $60 million  from the sale of
Convertible  Subordinated  Debentures,  including  the  sale of $50  million  of
Convertible Subordinated Debentures to BAe or its Affiliates and the sale of $10
million of  Convertible  Subordinated  Debentures  to Matra Marconi Space or its
Affiliates.

                  5. ELIMINATION OF KINGSTON INVESTMENT IN PPU INTEREST SHARES

                  Section 3.2(d) of the Exchange  Agreement is hereby amended to
delete  such  Section  in its  entirety;  Section  3.2(a)(iii)  of the  Exchange
Agreement is hereby amended to delete the language  "other than interest paid to
Kingston  under Section  3.2(d)" in its  entirety;  Section  3.2(b)(iii)  of the
Exchange  Agreement is hereby  amended to delete the language  "and PPU Interest
Shares  calculated  as set forth in Section  3.2(d)" in its  entirety;  the last
paragraph  of Section  3.2(b) of the  Exchange  Agreement  is hereby  amended to
replace the language  "Section  3.2(b),  in Sections 3.2(c) and 3.2(d)" with the
language  "Section  3.2(b)  and in Section  3.2(c);  and  Section  3.2(c) of the
Exchange Agreement is hereby amended to delete the language "other than Kingston
(or an Affiliate of Kingston)" in its entirety.

                  6.       ORION 2 SATELLITE CONTRACT

                  Section 9.7 of the Exchange Agreement shall be amended to read
in its entirety as follows:

                  The Option Agreement,  dated December 10, 1996,  between Orion
Atlantic and Matra Marconi Space ("Orion 2 Option Agreement"),  shall be in full
force and effect;  Orion Atlantic shall not be in default thereunder;  and Orion
Atlantic shall have made all payments required to be made thereunder through the
earlier of the Closing Date and March 31, 1997.  Restated  Amendment  #10, dated
December 10, 1996, to the Second Amended and Restated Purchase  Contract,  dated
as of September 26, 1991,  between Orion  Atlantic and Matra Marconi  Space,  as
amended,  shall be in full force and effect,  and Orion Atlantic shall not be in
default thereunder.

                  7.       MISCELLANEOUS

                           7(a)     Defined Terms

                  Capitalized  terms used in this  Amendment  and not  otherwise
defined in this Amendment  shall have the meanings  provided for in the Exchange
Agreement.

                                      -4-
<PAGE>

                           7(b)     Governing Law

                  This  Amendment,  the rights and  obligations  of the  parties
hereto,  and any claims or disputes relating  thereto,  shall be governed by and
construed in accordance with the same laws as govern the Exchange Agreement.

                           7(c)     Counterparts

                  To facilitate execution,  this Amendment may be executed in as
many  counterparts  as may be required;  and it shall not be necessary  that the
signatures  of, or on behalf  of,  each  party,  or that the  signatures  of all
persons required to bind any party, appear on each counterpart;  but it shall be
sufficient  that the  signature  of, or on behalf of,  each  party,  or that the
signatures of the persons  required to bind any party,  appear on one or more of
the  counterparts.  All  counterparts  shall  collectively  constitute  a single
agreement.  It shall not be  necessary  in  making  proof of this  Amendment  to
produce  or  account  for more  than a number  of  counterparts  containing  the
respective signatures of, or on behalf of, all of the parties hereto.

                           7(d)     Facsimile Execution

                  To  facilitate  execution,  this  Amendment  may  be  executed
through the use of facsimile  transmission,  and a counterpart of this Amendment
that contains the facsimile  signature of a party,  which  counterpart  has been
transmitted  by facsimile  transmission  to each of the other parties  hereto at
such facsimile numbers as such other parties shall request,  shall constitute an
executed counterpart of this Amendment.

                           7(e)     Ratification

                  The Exchange Agreement,  as amended and modified by this First
Amendment,  is in all respects  ratified and confirmed and the terms,  covenants
and agreements thereof shall be and remain in full force and effect. The parties
executing this First Amendment agree that the Exchange Agreement, as amended and
modified by this First  Amendment,  shall be remain  valid and binding upon such
parties,  notwithstanding  the  failure of one or more  Exchanging  Partners  to
execute  this  First  Amendment  and   notwithstanding  any  such  non-executing
Exchanging  Partner  seeking to  terminate  the  Exchange  Agreement  as to such
non-executing Exchanging Partner under Section 13.1(b) of the Exchange Agreement
after January 30, 1997 and before April 30, 1997.

                           7(f)     Effectiveness of the Amendment

                  This First  Amendment  to Section 351 Exchange  Agreement  and
Plan of  Conversion  is being  made  pursuant  to Section  14.5 of the  Exchange
Agreement  

                                      -5-

<PAGE>


which  provides that an amendment to the Exchange  Agreement  shall be valid and
binding when set forth in writing and duly  executed and  delivered by the party
against whom enforcement of the amendment is sought.  The parties executing this
First  Amendment agree that this First Amendment shall be valid and binding upon
such parties,  notwithstanding the failure of one or more Exchanging Partners to
execute this First Amendment.






















                                      -6-
<PAGE>



                  IN WITNESS  WHEREOF,  the undersigned  have duly executed this
Amendment, or have caused this Amendment to be duly executed on their behalf, as
of the day and year first hereinabove set forth.

                                          INTERNATIONAL PRIVATE 
                                          SATELLITE PARTNERS, L.P.

                                          By:   Orion Satellite Corporation, its
                                                general partner

                                          By:
                                             -----------------------------------
                                          Title:
                                                --------------------------------


                                          ORION NETWORK SYSTEMS, INC.

                                          By:
                                             -----------------------------------
                                          Title:
                                                  ------------------------------


                                          ORION SATELLITE CORPORATION

                                          By:
                                             -----------------------------------
                                          Title:
                                                 -------------------------------


                                       -7-

<PAGE>



                                         BRITISH AEROSPACE 
                                         COMMUNICATIONS, INC.


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------


                                         COM DEV SATELLITE 
                                         COMMUNICATIONS LIMITED


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------


                                         KINGSTON COMMUNICATIONS 
                                         INTERNATIONAL LIMITED


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------

                                         LOCKHEED MARTIN 
                                         COMMERCIAL LAUNCH 
                                         SERVICES, INC.


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------


                                         MCN SAT US, INC.


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------
                                      -8-
<PAGE>




                                         TRANS-ATLANTIC SATELLITE, 
                                         INC.


                                         By:
                                             -----------------------------------
                                         Title:
                                               ---------------------------------





                                      -9-






                                                                       




                          REGISTRATION RIGHTS AGREEMENT


         THIS  REGISTRATION  RIGHTS  AGREEMENT  (the  "Agreement")  is made  and
entered  into as of __________,  1997,  between and among Orion Newco  Services,
Inc., a Delaware corporation (the "Company"),  British Aerospace Holdings, Inc.,
a Delaware  corporation  ("BAe"),  and Matra Marconi Space UK Limited, a company
organized  under  the  laws  of  England  and  Wales  ("Matra")  (together,  the
"Purchasers").

         WHEREAS,  the  Company  proposes  to issue  and sell to the  Purchasers
$60,000,000  aggregate  principal amount of its Convertible Junior  Subordinated
Debentures  Due  February  1,  2012  (Interest  Payable  in Common  Stock)  (the
"Debentures"), pursuant to the terms of a Debenture Purchase Agreement, dated as
of January , 1997 (the "Debenture Purchase Agreement");

         WHEREAS,  as a  condition  to the  Purchasers'  obligations  under  the
Debenture Purchase Agreement, the Company agrees with each of the Purchasers for
their  benefit  and for the  benefit  of the  holders  from  time to time of the
Registrable  Securities  (as defined  herein) whose names appear in the register
maintained by the Company's  registrar in accordance  with the provisions of the
Debenture Purchase Agreement (each of the foregoing a "Holder," and collectively
the "Holders"), to grant to the Purchasers certain registration rights;

         WHEREAS,  the purchase of the Debentures  under the Debenture  Purchase
Agreement  and this  Agreement are  conditioned  upon,  among other things,  the
consummation  of the  transactions  contemplated  under the Section 351 Exchange
Agreement and Plan of Conversion, dated as of June, 1996, as amended, and as may
be further  amended from time to time (the  "Exchange  Agreement"),  among Orion
Network Systems,  Inc., a Delaware  corporation ("ONS"),  International  Private
Satellite  Partners,  L.P.,  a Delaware  limited  partnership,  Orion  Satellite
Corporation, a Delaware corporation, and British Aerospace Communications,  Inc.
("BAC"); COM DEV Satellite  Communications Limited, a Canadian corporation ("COM
DEV");  Kingston  Communications  International  Limited, a company incorporated
under  the laws of  England  ("Kingston");  Lockheed  Martin  Commercial  Launch
Services,  Inc., a Delaware corporation ("Lockheed Martin"); MCN Sat US, Inc., a
Delaware corporation ("MCN Sat"); and TransAtlantic Satellite,  Inc., a Delaware
corporation ("TA Sat") (collectively,  BAC, COM DEV, Kingston,  Lockheed Martin,
MCN Sat, and TA Sat are referred to herein as the "Exchanging Partners").

         NOW,  THEREFORE,  in consideration of the premises,  the parties hereby
consent and agree, as follows:



<PAGE>



         1.       Definitions.
                  -----------

         As used in this  Agreement,  the  following  capitalized  defined terms
shall have the following meanings:

         Business  Day:  any day other than a Saturday or Sunday or day on which
banking institutions in the State of New York are not required to be open.

         Closing  Date:  the  date  of  closing  of the  Company's  sale  of the
Debentures  to  the  Purchasers  as  contemplated  by  the  Debenture   Purchase
Agreement.

         Commission: the Securities and Exchange Commission.
         ----------

         Common  Stock:  the common  stock,  par value  $.01 per  share,  of the
Company.

         Company:  the meaning set forth in the  preamble and shall also include
the  Company's  successors  or  other  parties  who  succeed  to  the  Company's
obligations hereunder.

         Debentures: the Convertible Junior Subordinated Debentures Due February
1, 2012 (Interest Payable in Common Stock) of the Company.

         Debenture Purchase Agreement: the meaning set forth in the preamble.
         ----------------------------
         Eligible  Series C Securities:  the Series C Securities  which a holder
thereof  is  permitted  to sell  under  the terms of the  Transfer  Restrictions
Agreements.

         Exchange Act: the Securities Exchange Act of 1934, as amended from time
to time.

         Exchange Agreement: the meaning set forth in the preamble.
         ------------------
         Exchanging Partner: the meaning set forth in the preamble.
         ------------------
         Holder: any holder of Registrable Securities.
         ------
         Initial Shelf Registrable Securities: Registrable Securities, excluding
the  shares  of  Common  Stock or  other  securities  issued  or  issuable  upon
conversion of the Debentures.

         Initial Shelf Registration Statement:  the Shelf Registration Statement
filed by the Company pursuant to Section 2(a).

         Losses: any losses, claims, damages,  liabilities,  costs and expenses,
including, but not limited to, reasonable attorney's fees.

                                       -2-

<PAGE>


         Managing Underwriters:  the investment banker or investment bankers and
manager  ormanagers  that  shall  administer  an  Underwritten  Offering  of the
securities covered by any registration statement.

         Market Value:  with respect to a specified date, the aggregate  closing
price of such shares of Common Stock on the principal national stock exchange or
automated  quotation  system  upon which the  Common  Stock is listed or quoted,
averaged  over a period of twenty (20)  consecutive  Business Days prior to such
date.  If during  this period the Common  Stock is not listed on any  securities
exchange,   quoted   on  the   Nasdaq   National   Market,   or  quoted  in  the
over-the-counter  market,  the Market Value will be the fair value of the Common
Stock determined by agreement  between the Company and the holders of a majority
of the  Registrable  Securities.  If such parties are unable to reach  agreement
within a reasonable  period of time, the fair value of the Common Stock shall be
determined  by an  independent  appraiser  experienced  in valuing  such type of
consideration  jointly  selected by the Company and the holders of a majority of
the Registrable  Securities.  The determination of such appraiser shall be final
and binding upon the parties,  and the fees and expenses of such appraiser shall
be borne by the Company.

         Other  Registrable  Stock:  shares of Common Stock which the Company is
obligated  to  register,  or  include  in a  registration  statement  under  the
Securities Act, under any Other Registration Rights Agreement.

         Other Registration Rights Agreement:  the following  agreements entered
into by ONS on or before the date of the Exchange  Agreement  under which ONS is
obligated  to  register,  or  include  in a  registration  statement  under  the
Securities  Act,  shares of capital stock of ONS, and amendments and supplements
to any  such  agreement  entered  into on or  before  the  date of the  Exchange
Agreement,  in each case as such  agreement will be amended prior to the closing
under the Exchange  Agreement to transfer all of the ONS rights and  obligations
under  each of such  agreements  to the  Company:  (i) the  Registration  Rights
Agreement dated as of June 17, 1994, among ONS and the Schedule of Investors set
forth therein,  as amended (the "Recent PRRAA"));  (ii) the Registration  Rights
Agreement, dated as of April 29, 1994, between ONS and Space Systems/Loral, Inc.
(the "SS/L RR Agreement"); and (iii) the Series C Registration Rights Agreement.

         Person:  any individual,  partnership,  corporation,  limited liability
company,  trust, or  unincorporated  organization,  or a government or agency or
political subdivision thereof.

         Piggyback  Registration:  the registration by the Company of the Common
Stock  (whether  for its own  account or for the  account  of others)  under the
Securities  Act, other than pursuant to a registration  statement filed pursuant
to the  provisions  of  Section  2 or  Section  3 hereof  or a  registration  of
securities  in  connection  with a business  acquisition  or  combination  or an
employee benefit plan.

         Proceeding:  any action,  suit,  proceeding or investigation or written
threat thereof.

         
                                       -3-

<PAGE>


         Registrable Securities:  regardless of who holds such securities at the
applicable time, (i)the shares of Common Stock of the Company received by BAe in
connection  with the purchase by ONS of BAe's interest in Asia Pacific Space and
Communications  Ltd.; (ii) the shares of Common Stock or other securities issued
or issuable  upon  conversion of the  Debentures or issued as interest  payments
pursuant to the  Debenture  Purchase  Agreement;  and (iii) the 86,505 shares of
Common  Stock  issued  pursuant  to the  respective  Warrants of ONS dated as of
December 20,  1991,  granted to BAC,  exercised on December 31, 1996;  provided,
however,  that such securities  shall cease to be Registrable  Securities when a
registration statement with respect to the registration of such securities shall
have been declared  effective under the Securities Act and such securities shall
have been disposed of pursuant to such registration statement.

         Registration  Expenses: any and all expenses incident to the filing and
effectiveness of each registration statement and performance of or compliance by
the  Company  with  this  Agreement,   including  without  limitation:  (i)  all
Commission,  stock exchange or National Association of Securities Dealers,  Inc.
("NASD")  registration  and filing fees, (ii) all fees and expenses  incurred in
connection  with  compliance  with state  securities or Blue Sky laws (including
reasonable  fees and  disbursements  of  counsel  in  connection  with  Blue Sky
qualification of any of the Registrable Securities and the preparation of a Blue
Sky memorandum and compliance with the rules of the NASD,  (iii) all expenses of
any Persons in preparing or assisting in preparing,  word  processing,  printing
and distributing any registration statement,  any prospectus,  any amendments or
supplements thereto, any underwriting  agreements,  securities sales agreements,
certificates  and other documents  relating to the performance of and compliance
with this Agreement,  (iv) all fees and expenses incurred in connection with the
listing of any of the Registrable  Securities on any securities  exchange or the
Nasdaq  National  Market,  (v) the fees and  disbursements  of  counsel  for the
Company and of the independent public accountants of the Company,  including the
expenses of any special audits or "cold comfort" letters required by or incident
to such performance and compliance,  (vi) the reasonable fees and  disbursements
of one special counsel representing the Holders of Registrable Securities,  such
special  counsel to be selected by the Holders of a majority of the  Registrable
Securities  being  registered,  (vii)  the fees  and  expenses  of a  "qualified
independent underwriter" if required by Rule 2720(c) of the rules of the NASD in
connection  with the offering of any of the Registrable  Securities,  (viii) the
fees  and  expenses  of any  escrow  agent or  custodian,  and (ix) any fees and
disbursements  of any  Underwriters  customarily  paid by  issuers or sellers of
securities and the reasonable fees and expenses of any special experts  retained
by the Company in  connection  with any  registration  statement,  but excluding
underwriting  discounts and commissions and transfer taxes, if any,  relating to
the sale or disposition of Registrable Securities by a Holder.

         Registration  Period: a period terminating fifteen (15) years following
the Closing Date.

         Securities  Act: the  Securities  Act of 1933,  as amended from time to
time.

         Series  C  Preferred  Stock:  the  Series  C 6%  Cumulative  Redeemable
Convertible Preferred Stock of the Company.



                                       -4-

<PAGE>


         Series  C  Registration  Rights  Agreement:   the  Registration  Rights
Agreement dated as of ____________  1996, among ONS and the Exchanging  Partners
and as amended through the Closing Date.

         Series C  Securities:  the shares of Common  Stock or other  securities
issued or issuable upon  conversion of the Series C Preferred Stock purchased by
the  Exchanging  Partners  pursuant  to the  Exchange  Agreement  or  issued  as
dividends or distributions  pursuant to the Certificate of Designations,  Rights
and  Preferences  establishing  the terms and relative rights and preferences of
the Series C Preferred Stock.

         Shelf Registration:  a registration required to be effected pursuant to
Section 2(a).

         Shelf Registration  Statement:  a "shelf" registration statement of the
Company which covers the  registration of Registrable  Securities on a Form S-3,
and all amendments and  supplements to such  registration  statement,  including
post-effective  amendments,  in each case  including  the  prospectus  contained
therein,  all  exhibits  thereto  and all  material  incorporated  by  reference
therein;   "Shelf  Registration  Statement"  shall  include  the  Initial  Shelf
Registration Statement and each Top-up Shelf Registration Statement.

         Top-up Shelf Registration  Statement:  the meaning set forth in Section
2(b).

         Transfer Restriction Agreement:  means (i) each agreement,  dated on or
about the Closing Date,  between the Company and any Exchanging Partner and (ii)
each  subsequent  agreement  entered into between the Company and any Exchanging
Partner,  any affiliate  thereof,  any transferee of Series C Preferred Stock or
Common  Stock into which such Series C Preferred  Stock is converted or which is
issued  as a  dividend  on such  Series C  Preferred  Stock or any  other  party
pursuant to the terms of another Transfer  Restriction  Agreement,  in each case
which provides for  restrictions  on transfer of the Series C Preferred Stock or
Common  Stock into which such Series C Preferred  Stock is converted or which is
issued as a dividend on such Series C Preferred Stock.

         Underwriter:   each  Person  who  participates  as  an  underwriter  of
securities in a registered offering under the Securities Act.

         Underwritten Offering: a sale of Company securities by the Company or a
holder of such  securities to an Underwriter or  Underwriters  for reoffering to
the public.

         2. Shelf Registration.
            -----------------

                  2(a)  Filing of  Initial  Shelf  Registration  Statement.  The
Company  shall  prepare and cause to be filed as soon as  practicable  after the
date that is one hundred eighty (180) days after the Closing Date (but not later
than fifteen (15) days  thereafter),  the Initial Shelf  Registration  Statement
providing  for  the  registration  of  all  of  the  Initial  Shelf  Registrable
Securities. The Company shall use all its best efforts to have the Initial Shelf
Registration   Statement  declared  

                                       -5-

<PAGE>


effective by the  Commission as soon as  practicable  after filing.  The Company
shall use its best  efforts to keep the  Initial  Shelf  Registration  Statement
continuously effective for the Registration Period, or such shorter period which
will terminate  when all of the  Registrable  Securities  covered by the Initial
Shelf Registration  Statement,  as amended from time to time pursuant to Section
2(b),  have been sold  pursuant to the  Initial  Shelf  Registration  Statement.
Notwithstanding  the foregoing,  except as set forth below,  any Holder who does
not provide information  reasonably  requested by the Company in connection with
the  Initial  Shelf  Registration  Statement  shall not be  entitled to have its
Registrable Securities included in the Initial Shelf Registration Statement.

                  2(b) Filing of  Subsequent  Shelf  Registration  Statements or
Amendments.  The  Company  shall  prepare and cause to be filed on or as soon as
practicable  after the first  anniversary of the Closing Date (but no later than
ten  (10)  days  thereafter)  and as  soon  as  practicable  after  each  of the
successive  semi-annual  interest  payment  dates  provided for in the Debenture
Purchase  Agreement  (but no later than ten (10) days  thereafter) an additional
Shelf  Registration  Statement or, at the  Company's  option,  a  post-effective
amendment to any then- effective Shelf  Registration  Statement (a "Top-up Shelf
Registration   Statement")   providing  for  the  registration  of  all  of  the
Registrable  Securities  comprising  shares of Common Stock or other  securities
issued as interest payments pursuant to the Debenture  Purchase  Agreement which
have not been registered  previously.  The Company shall also use all reasonable
efforts to cause to be filed, as soon as practicable  each time after receipt of
a written demand from a Holder (but no later than thirty (30) days  thereafter),
provided,  however,  that such demand  shall not be  effective  before the first
anniversary of the Closing Date or after the end of the Registration  Period, an
additional  Shelf  Registration   Statement  or,  at  the  Company's  option,  a
post-effective  amendment to any  then-effective  Shelf  Registration  Statement
(also a "Top-up Shelf Registration Statement") providing for the registration of
any and all of the Registrable  Securities each Holder demands to be included in
such  Top-up  Shelf  Registration  Statement  which  have  not  been  registered
previously.  The  Company  shall use its best  efforts  to have each such  Shelf
Registration  Statement or post-effective  amendment  declared  effective by the
Commission as soon as practicable  after filing.  The Company shall use its best
efforts to keep each Top-up Shelf Registration  Statement continuously effective
for the  Registration  Period,  or such shorter period which will terminate when
all of the  Registrable  Securities  covered by such Top-up  Shelf  Registration
Statement, as amended from time to time pursuant to this Section 2(b), have been
sold pursuant to such Top-up Shelf Registration  Statement.  Notwithstanding the
foregoing,  except  as  set  forth  below,  any  Holder  who  does  not  provide
information  reasonably  requested by the Company in connection  with the Top-up
Shelf  Registration  Statement  shall not be  entitled  to have its  Registrable
Securities included in the Top-up Shelf Registration Statement.

                  2(c) Effective  Registration  Statement,  Amendments.  A Shelf
Registration  Statement  pursuant  to this  Section 2 will not be deemed to have
become  effective  unless  it has been  declared  effective  by the  Commission;
provided, however that if, after it has been declared effective, the offering of
any Registrable Securities pursuant to such registration statement is interfered
with by any  stop  order,  injunction  or  other  order  or  requirement  of the
Commission  or  any  other  governmental  agency  or  court,  such  registration
statement will be deemed not to have become effective,  and the Company shall be
required to continue to use its best efforts to have such 

                                       -6-

<PAGE>



registration  statement  declared  effective.  Further,  the Company  shall,  if
necessary, supplement or amend each Shelf Registration Statement, if required by
the rules,  regulations or instructions applicable to the registration form used
by the Company for such Shelf Registration Statement or by the Securities Act or
by any other rules and regulations thereunder for shelf registration.

                  2(d) Expenses.  The Company shall pay any and all Registration
Expenses  incident  to the  filing  of  each  Shelf  Registration  Statement  or
otherwise  incident to the performance of or compliance by the Company with this
Section 2. Each Holder shall pay all underwriting  discounts and commissions and
transfer  taxes,  if any,  relating to the sale or  disposition of such Holder's
Registrable Securities pursuant to the Shelf Registration Statement.

3. Demand Registration of Underwritten Offerings.
   ---------------------------------------------
                  3(a)  Requests  for  Underwritten  Registration.  At any  time
following  one hundred  eighty  (180) days after the Closing  Date,  one or more
Holders may request that the Company effect a registration  under the Securities
Act of all or any of their Registrable  Securities in an Underwritten  Offering;
provided,  however,  that, unless the requesting Holder is Matra, the requesting
Holders must request registration of Registrable Securities with a Market Value,
on the date of such request,  of at least $20 million;  and  provided,  further,
that if the  requesting  Holder is Matra,  Matra must  request  registration  of
Registrable  Securities with a Market Value, as of the date of such request,  of
at least $10 million.  Each request for an  Underwritten  Offering shall specify
the  approximate  number of shares of  Registrable  Securities  requested  to be
registered and the anticipated  per share price range for such offering.  Within
ten (10) days after receipt of any such  request,  the Company will give written
notice of such requested  demand  registration to all other Holders and, subject
to Section 3(b),  will include in any such  registration  which  constitutes  an
Underwritten  Offering  satisfying  the  requirements  of this  Section 3(a) all
Registrable  Securities  with respect to which the Company has received  written
requests  for  inclusion  therein  within  fifteen  (15) days after the date the
Company's notice is given.

                  3(b)  Priority  on  Underwritten  Offering.  If  the  Managing
Underwriters for an Underwritten  Offering advise the Company in writing that in
their reasonable  opinion the aggregate  number of Registrable  Securities to be
included in an Underwritten  Offering  (together with any other shares of Common
Stock which the Company is required to include in such registration) exceeds the
number of shares which can be sold in an orderly manner in such offering  within
a price  range  acceptable  to the  holders  of a  majority  of the  Registrable
Securities  and  Other  Registrable  Stock  requested  to be  included  in  such
registration,  the Company  will  include in such  registration  (i) first,  the
maximum amount of Registrable  Securities  requested to be included therein, pro
rata  among  the  respective  Holders  thereof  on the  basis of the  amount  of
Registrable  Securities  requested to be included in such  registration  by each
such Holder,  and (ii) second, the maximum amount of Other Registrable Stock and
any other securities requested to be included therein (including by the Company,
subject to Section  3(e)),  pro rata among the  Company  and the holders of such
Other  Registrable  Stock and  other  securities  on the basis of the  number of
shares  requested  to be included in such  registration  by the Company and each
such holder,  in each case up to the  greatest  number of shares of Common Stock
which in the reasonable  opinion of such  underwriters can be sold in an orderly
manner  in the  price  range of such  offering.  In no  event  shall  any  Other
Registrable  Stock  or any  other  securities  be  included  in an  Underwritten
Offering under this Section 3 unless all

                                       -7-

<PAGE>



Registrable  Securities  requested  to be sold in any such  offering  have  been
included therein.

                  3(c) Restrictions on Underwritten Offerings.  The Company will
not be  obligated to effect more than one  Underwritten  Offering for Holders of
Registrable  Securities within any twelve (12) month period,  except as provided
in the following  sentence,  and will not be obligated to effect an Underwritten
Offering for Holders of  Registrable  Securities  at any time before ninety (90)
days  after the  earlier  of (i) the date the  previous  registration  statement
prepared in connection with an Underwritten  Offering for holders of Registrable
Securities  ceases to be effective  or (ii) the date that all shares  registered
thereunder have been sold. The foregoing  limitation on  Underwritten  Offerings
within any twelve  (12) month  period  shall not apply to a single  Underwritten
Offering with respect to Registrable Securities of any Holder (other than Matra)
if the Company effected an Underwritten  Offering made at Matra's request within
the preceding twelve (12) months or to a single Underwritten  Offering requested
by Matra if the  Company  effected  an  Underwritten  Offering  with  respect to
Registrable  Securities  of any other Holder  within the  preceding  twelve (12)
months.

                  3(d) Selection of  Underwriters.  The Holders of a majority of
the  Registrable  Securities  requested  to be  included  in  such  Underwritten
Offering will have the right to select the Managing Underwriter(s) to administer
the offering;  provided,  first,  that if the Company is successful in obtaining
the services of one or more Underwriters who have been the Managing Underwriters
for an  Underwritten  Offering  of the  Company's  securities  previously,  such
Underwriters  shall be the Managing  Underwriter(s)  to administer the offering;
provided,  however,  that  such  Managing  Underwriter(s)  shall  be  nationally
recognized  investment  banking firms  approved by the Holders,  which  approval
shall not be unreasonably  withheld;  and provided,  second, that if the Company
participates in the Underwritten Offering under Section 3(e), such Holders shall
obtain the  Company's  consent with respect to any  Managing  Underwriter(s)  to
administer the offering, which consent shall not be unreasonably withheld.

                  3(e)  Inclusion  by the  Company  of its  Common  Stock  in an
Underwritten Offering. If the Managing Underwriters for an Underwritten Offering
advise the  Company in writing  that in their  opinion the  aggregate  number of
Registrable Securities to be included in an Underwritten Offering (together with
any Other Registrable Stock) is less than the number of shares which can be sold
in an orderly  manner in such  offering  within a price range  acceptable to the
holders of a majority of the Registrable  Securities and Other Registrable Stock
requested to be included in such  registration,  the Company may include in such
registration,  on its own behalf,  up to the greatest number of shares of Common
Stock which in the opinion of such  underwriters  can be sold (together with the
Registrable  Securities and Other  Registrable Stock requested to be included in
such registration) in an orderly manner in the price range of such offering.

                  3(f)    Participation    in    Underwritten     Registrations.
Notwithstanding any other provision of this Section 3 to the contrary, no Person
may participate in any  Underwritten  Offering  hereunder unless such Person (a)
agrees to sell such Person's  securities on the basis provided in the applicable
underwriting  arrangements  and (b) completes  and executes all  questionnaires,
powers of attorney,  indemnities,  underwriting  agreements and other  documents
required under the terms of such underwriting arrangements;  provided,  however,
that no Holder of Registrable  Securities included in any Underwritten  Offering
shall be required to make any  representations  or  warranties to the Company or
the underwriters other than representations and warranties regarding such Holder
and such Holder's intended method of distribution.

                                       -8-

<PAGE>





                  3(g) Expenses of Underwriting  Offering. The Company shall pay
any and all Registration  Expenses  incident to the filing of each  registration
statement or  otherwise  incident to the  performance  of or  compliance  by the
Company with this Section 3. Each Holder  shall pay all  underwriting  discounts
and commissions and transfer taxes, if any,  relating to the sale or disposition
of such Holder's Registrable Securities included in the Underwritten Offering.

                  3(h)  Relationship  to  Shelf  Registration.  The  rights  and
obligations  of the parties  hereto under Section 3 shall be in addition to, and
not in lieu of, their respective rights and obligations under Section 2.

         4. Piggyback Registration Rights.
            -----------------------------
                  4(a)  Requests  for  Piggyback  Registration.  If at any  time
following the date of this Agreement, the Company proposes to effect a Piggyback
Registration,  the  Company  will  give  written  notice to all  Holders  of its
intention to effect such a registration and, subject to Section 4(b) and Section
4(c), will include in such registration all Registrable  Securities with respect
to which the Company has received written requests for inclusion  therein within
fifteen (15) days after the date the Company's notice is given.

                  4(b)  Priority  on  Primary  Registrations.  If  the  proposed
Piggyback  Registration is an underwritten primary registration on behalf of the
Company,  and the  Managing  Underwriters  advise the Company in writing that in
their  opinion  the  number  of  securities  requested  to be  included  in such
registration exceeds the number which can be sold in such offering in an orderly
manner within a price range acceptable to the Company,  the Company will include
in such  registration (i) first, the securities the Company proposes to sell and
the High Priority  Registrable  Securities (as defined in the Recent PRRAA), pro
rata  among  the  Company  and the  holders  of such High  Priority  Registrable
Securities on the basis of the number of shares  requested to be included by the
Company and each such holder, (ii) second, any Other Registrable Stock requested
to be included  therein,  pro rata among the  holders of such Other  Registrable
Stock on the basis of the  number of shares  requested  to be  included  in such
registration by each such holder,  and (iii) third,  the Registrable  Securities
requested  to be  included  in such  registration,  pro rata  among the  Holders
thereof on the basis of the amount of  Registrable  Securities  requested  to be
included by each such Holder,  in each case up to the greatest  number of shares
of Common Stock which in the reasonable opinion of such underwriters can be sold
in an orderly manner in the price range of such offering.

                  4(c)  Priority  on  Secondary  Registrations.  If a  Piggyback
Registration is an underwritten  secondary  registration on behalf of holders of
the  Company's  securities  (other  than the  Registrable  Securities),  and the
Managing  Underwriters  advise the Company in writing that in their  opinion the
number of securities  requested to be included in such registration  exceeds the
number  which  can be sold in such  offering  without  adversely  affecting  the
marketability of the offering, the Company will include in such registration (A)
if  such  registration  is on  behalf  of  holders  of  the  Eligible  Series  C
Securities,  (i)  first,  the  securities  requested  to  be  included  in  such
registration  under the Series C Registration  Agreement,  and (ii) second,  the
Registrable Securities requested to be

                                       -9-

<PAGE>



included  in  such  registration  and any  Other  Registrable  Stock  (excluding
Eligible Series C Securities) and any other securities  requested to be included
therein (including by the Company, subject to Section 3(e)), pro rata among such
Holders and the holders of such Other  Registrable Stock and other securities on
the basis of the number of shares requested to be included in such  registration
by each such holder,  in each case up to the greatest number of shares of Common
Stock which in the  reasonable  opinion of such  underwriters  can be sold in an
orderly manner in the price range of such offering;  or (B) if such registration
is not on behalf of holders of Series C  Securities  (i) first,  the  securities
requested to be included  therein by the holders  requesting such  registration,
and (ii)  second,  the  greatest  number of the  Registrable  Securities,  Other
Registrable  Stock and any other  securities  requested  to be included  therein
(including by the Company, subject to Section 3(e)), pro rata among such Holders
and the  holders of such Other  Registrable  Stock and other  securities  on the
basis of the number of shares  requested to be included in such  registration by
each such  holder,  in each case up to the  greatest  number of shares of Common
Stock which in the  reasonable  opinion of such  underwriters  can be sold in an
orderly manner in the price range of such offering.

                  4(d) Participation in Piggyback Registrations. Notwithstanding
any other provision of this Section 4 to the contrary, no Person may participate
in any Piggyback  Registrations  hereunder unless such Person (i) agrees to sell
such Person's  securities on the basis provided in the  applicable  underwriting
arrangements  and (ii)  completes  and  executes all  questionnaires,  powers of
attorney,  indemnities,  underwriting  agreements and other  documents  required
under the terms of such underwriting  arrangements;  provided,  however, that no
Holder of Registrable  Securities included in any Piggyback  Registrations shall
be  required to make any  representations  or  warranties  to the Company or the
underwriters other than representations and warranties regarding such Holder and
such Holder's intended method of distribution.

                  4(e) Expenses of Piggyback Registration. The Company shall pay
any and all Registration  Expenses  incident to the filing of each  registration
statement or  otherwise  incident to the  performance  of or  compliance  by the
Company with this Section 4. Each Holder  shall pay all  underwriting  discounts
and commissions and transfer taxes, if any,  relating to the sale or disposition
of such Holder's Registrable Securities included in the Piggyback Registration.

         5.       Registration Procedures.
                  -----------------------
         In  connection  with the  obligations  of the Company with respect to a
registration statement pursuant to Section 2, Section 3 or Section 4 hereof, the
Company shall effect or cause to be effected the registration of the Registrable
Securities  under  the  Securities  Act to permit  the sale of such  Registrable
Securities by the Holders in accordance with their intended method or methods of
distribution, and the Company shall:

                  5(a)  prepare  and file  with the  Commission  a  registration
statement with respect to such  Registrable  Securities and use its best efforts
to cause such registration  statement to become effective within the time period
required  hereunder  (provided  that before filing a  registration  statement or
prospectus or any amendments or supplements thereto, the Company will furnish to
one 

                                      -10-

<PAGE>



counsel selected by the holders of 70% of the Registrable  Securities  (together
with any Other Registrable Stock) covered by such registration  statement copies
of all such documents  proposed to be filed,  which documents will be subject to
the  review  of  such  counsel,   and  the  Company  will  incorporate  in  such
registration  statement the reasonable comments of such counsel not inconsistent
with the Company's disclosure obligations under applicable securities laws;

                  5(b) prepare and file with the Commission  such amendments and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration  statement effective for
the period required  hereunder (or if no period is so required,  a period of not
less  than  one  hundred  eighty  (180)  days or such  shorter  period  which is
sufficient to complete the  distribution of the securities  registered under the
registration  statement)  and comply with the  provisions of the  Securities Act
with respect to the disposition of all securities  covered by such  registration
statement  during  such  period  in  accordance  with the  intended  methods  of
disposition by the sellers thereof set forth in such registration statement;

                  5(c)  furnish to each seller of  Registrable  Securities,  the
Managing Underwriters,  if any, and their respective counsel, not less than five
(5) Business Days prior to the filing thereof with the  Commission,  such number
of copies of such registration statement, each amendment and supplement thereto,
the  prospectus  included  in  such  registration   statement   (including  each
preliminary  prospectus)  and such other documents as such seller may reasonably
request in order to facilitate  the  disposition of the  Registrable  Securities
owned by such  seller  and to use its  best  efforts  to  reflect  in each  such
document,  when so filed with the  Commission,  such  comments as the sellers of
Registrable Securities or their counsel shall reasonably propose;

                  5(d)  use  its  best  efforts  to  register  or  qualify  such
Registrable  Securities  under  such other  securities  or blue sky laws of such
jurisdictions  as any seller  reasonably  requests and do any and all other acts
and things which may be reasonably  necessary or advisable to enable such seller
to  consummate  the  disposition  in  such   jurisdictions  of  the  Registrable
Securities  owned by such seller (provided that the Company will not be required
to (i) qualify  generally to do business in any jurisdiction  where it would not
otherwise be required to qualify but for this subparagraph,  (ii) subject itself
to  taxation in any such  jurisdiction  or (iii)  consent to general  service of
process in any such jurisdiction);

                  5(e)  notify  each seller of such  Registrable  Securities  as
promptly as practicable in any of the following  circumstances:  (i) at any time
when a  prospectus  relating  thereto  is  required  to be  delivered  under the
Securities  Act,  of the  happening  of any  event  as a  result  of  which  the
prospectus included in such registration  statement contains an untrue statement
of a material fact or omits any fact  necessary to make the  statements  therein
not misleading, and, at the request of any such seller, the Company will prepare
a supplement or amendment to such prospectus so that, as thereafter delivered to
the purchasers of such Registrable Securities,  such prospectus will not contain
an untrue  statement of a material  fact or omit to state any fact  necessary to
make the statements therein not misleading;  (ii) when a registration  statement
and any  amendment  thereto  has been  filed  with the  Commission  and when the
registration statement or any post-effective amendment thereto

                                      -11-

<PAGE>



has become  effective;  (iii) of any request by the  Commission for amendment or
supplements to the registration  statement or the prospectus included therein or
for additional  information;  (iv) of the issuance by the Commission of any stop
order  suspending  the  effectiveness  of  the  registration  statement  or  the
initiation  of any  proceedings  for that  purpose;  and (v) the  receipt by the
Company of any notification  with respect to the suspension of the qualification
of  the  securities  included  therein  for  sale  in  any  jurisdiction  or the
initiation of any proceeding for such purpose;

                  5(f)  cause all such  Registrable  Securities  to be listed on
each securities  exchange on which similar  securities issued by the Company are
then listed and, if not so listed, to be listed on the NASD automated  quotation
system  and,  if listed on the NASD  automated  quotation  system,  use its best
efforts to secure designation of all such Registrable Securities covered by such
registration  statement as a Nasdaq "national market system security" within the
meaning of Rule 11Aa2-1 of the Exchange Act or,  failing  that, to secure Nasdaq
authorization   for  such  Registrable   Securities  and  without  limiting  the
generality  of the  foregoing,  to  arrange  for at least two  market  makers to
register as such with respect to such Registrable Securities with the NASD;

                  5(g)  provide  a  transfer  agent and  registrar  for all such
Registrable  Securities not later than the effective  date of such  registration
statement;

                  5(h) if requested,  promptly  incorporate in any  registration
statement  or   prospectus,   if   necessary,   pursuant  to  a  supplement   or
post-effective amendment to such registration statement, such information as the
Managing  Underwriters,  if any,  or the  holders of a majority  of  Registrable
Securities and Other Registrable  Securities being registered reasonably request
to have included  therein and shall make all required filings of such prospectus
supplement or post-effective  amendment as soon as practicable after the Company
is notified of the matters to be incorporated  in such prospectus  supplement or
post-effective amendment.

                  5(i) enter into such agreements on terms reasonably acceptable
to the Company (including underwriting  agreements) in form, scope and substance
as are  customary  in  underwritten  offerings,  and take all  other  reasonable
actions  necessary to facilitate  the  registration  or the  disposition  of the
Registrable Securities included in any registration statement.

                  5(j) (i) make  reasonably  available at  reasonable  times for
inspection by the Holders of Registrable Securities to be registered thereunder,
any underwriter  participating in any disposition  pursuant to such registration
statement,  and any attorney,  accountant or other agent retained by the Holders
or such  underwriters,  at the office where normally kept during normal business
hours,  all financial and other  records,  pertinent  corporation  documents and
properties  of the  Company  and  its  subsidiaries,  and  cause  the  Company's
officers,  directors and employees to supply all relevant information reasonably
requested by the Holders,  underwriters,  attorney, accountant or other agent in
connection  with the  registration  statement  as is  customary  for similar due
diligence examinations,  provided,  however, that such persons shall first agree
in writing with the Company that any information  that is reasonably and in good
faith  designated  by the  Company  in writing  as  confidential  at the time of
delivery of such information shall be kept confidential by such persons;

                                      -12-

<PAGE>



(ii)  obtain  opinions of counsel to the  Company  and  updates  thereof  (which
counsel,  if different from counsel to the Company  referred to in the Debenture
Purchase  Agreement,  shall  be  reasonably  satisfactory  to the  holders  of a
majority  of  the  Registrable  Securities  to  be  registered  thereunder,  the
underwriters,  if any, and their respective  counsel)  addressed to each selling
Holder  covering  such matters in form,  scope and substance as are customary in
underwritten offerings;  (iii) obtain "cold comfort" letters (or, in the case of
any person that does not satisfy the  conditions for receipt of a "cold comfort"
letter  specified  in Statement on Auditing  Standards  No. 72, an  "agreed-upon
procedures  letter") and updates thereof from the independent  certified  public
accountants of the Company (and, if necessary,  any other independent  certified
public  accountants of any subsidiary of the Company or of any business acquired
by the Company for which  financial  statements  and financial  data are, or are
required  to  be,  included  in the  registration  statement),  addressed  where
reasonably   practicable  to  each  selling  Holder  of  Registrable  Securities
registered  thereunder,  and the  underwriters,  if any, in  customary  form and
covering  matters of the type  customarily  covered in "cold comfort" letters in
connection with primary underwritten offerings;  and (iv) deliver such documents
and certificates as may be reasonably  requested by the holders of a majority of
the Registrable Securities and Other Registrable Securities to be registered and
the Managing  Underwriters,  if any, including those to evidence compliance with
Section 5(e). The foregoing actions set forth in clauses (ii), (iii) and (iv) of
this  Section  5(j)  shall  be  performed  at  (A)  the  effectiveness  of  such
registration  statement and each  post-effective  amendment thereto and (B) each
closing  under  any  underwriting  or  similar  agreement  as and to the  extent
required thereunder;

                  5(k)  otherwise  use its  best  efforts  to  comply  with  all
applicable rules and regulations of the Commission;

                  5(l) use its best efforts to cause such Registrable Securities
covered by such registration statement to be registered with or approved by such
other  governmental  agencies or  authorities  as may be necessary to enable the
sellers thereof to consummate the disposition of such Registrable Securities;

                  5(m) take all such action as may be  necessary so that (i) any
registration statement and any amendment thereto and any prospectus forming part
thereof  and any  amendment  or  supplement  thereto  (and each  report or other
document  incorporated  therein  by  reference  in each  case)  complies  in all
material  respects  with  the  Securities  Act  and  the  Exchange  Act  and the
respective rules and regulations thereunder; (ii) any registration statement and
any  amendment  thereto does not, when it becomes  effective,  contain an untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated therein or necessary to make the statements  therein not misleading;  and
(iii)  any  prospectus  forming  part  of any  registration  statement,  and any
amendment or supplement to such prospectus, does not include an untrue statement
of a material fact or omit to state a material  fact  necessary in order to make
the  statements  therein,  in light of the  circumstances  under which they were
made, not misleading.

                  5(n) use its best  efforts to  prevent  the  issuance,  and if
issued to obtain the withdrawal,  of any order  suspending the  effectiveness of
any registration statement at the earliest

                                      -13-

<PAGE>

possible time;

                  5(o) unless any Registrable  Securities shall be in book-entry
form,  cooperate  with the  Holders to  facilitate  the timely  preparation  and
delivery of certificates representing Registrable Securities to be sold pursuant
to any  registration  statement  free  of any  restrictive  legend  and in  such
permitted  denominations and registered in such names as the Holders may request
in  connection  with  the  sale  of  Registrable  Securities  pursuant  to  such
registration statement; and

                  5(p) use its best efforts to comply with all applicable  rules
and  regulations of the Commission and make generally  available to its security
holders in a regular  filing on Form 10-Q or Form 10-K or  otherwise  provide in
accordance  with Section 11(a) of the Securities Act within the period  required
after the effective  date of the applicable  registration  statement an earnings
statement  satisfying  the provisions of Section 11(a) of the Securities Act and
Rule 158 thereof.

         The Company may require each Holder of  Registrable  Securities  (i) to
furnish to the Company such information  regarding the proposed  distribution by
such Holder of such Registrable  Securities as the Company may from time to time
reasonably request in writing, and (ii) to enter into an underwriting  agreement
and securities sales agreement in the form contemplated by Section 5(i).

         Each Holder agrees that, upon receipt of any notice from the Company of
the  happening of any event of the kind  described in Section 5(e) hereof,  such
Holder  will  immediately  discontinue  disposition  of  Registrable  Securities
pursuant to a registration  statement until such Holder's  receipt of the copies
of the supplemented or amended  prospectus  contemplated by Section 5(e) hereof,
and, if so directed by the Company,  such Holder will deliver to the Company (at
the expense of the Company) all copies in its  possession,  other than permanent
file copies then in such Holder's  possession,  of the prospectus  covering such
Registrable  Securities  current at the time of receipt of such  notice.  If the
Company  shall give any such notice to suspend the  disposition  of  Registrable
Securities  pursuant to a registration  statement,  the Company shall extend the
period during which the  registration  statement  shall be maintained  effective
pursuant  to this  Agreement  by the number of days  during the period  from and
including  the date of the giving of such notice to and  including the date when
the Holders shall have received copies of the supplemented or amended prospectus
necessary to resume such dispositions.

         6.       Hold-Back Agreements.
                  --------------------
                  6(a)  Restrictions  on Public Sale by Holders.  By electing to
include  Registrable  Securities in a registration  statement  filed pursuant to
Section 3 or Section 4 hereof, each such Holder of Registrable  Securities shall
be deemed to have agreed not to effect any public sale or public distribution of
securities  of the  Company  of the  same or  similar  class or  classes  of the
securities included in the registration  statement or any securities convertible
into or  exchangeable  or  exercisable  for such  securities,  including  a sale
pursuant to Rule 144 or Rule 144A under the  Securities  Act,  during the 15-day
period  prior to,  and  during  such  period of time as may be  required  by the
Underwriters,  but not to exceed a 180-day  period  beginning  on, the effective
date  of  the  
                                      -14-

<PAGE>



registration statement (except pursuant to the registration  statement),  except
to the extent otherwise agreed in writing by the Managing Underwriter.

                  6(b)  Restrictions on Public Sale by the Company.  The Company
shall not effect any public sale or public  distribution of any securities which
are the same as or  substantially  similar to the Registrable  Securities  being
registered  pursuant to a registration  statement filed pursuant to Section 3 or
Section  4  hereof,  or any  securities  convertible  into  or  exchangeable  or
exercisable  for such  securities  during the 15-day period prior to, and during
the 180-day period beginning on, the effective date of a registration  statement
(except pursuant to the registration statement).

         7.       Black-Out Periods for Shelf Registration Statements.
                  ---------------------------------------------------

                  Notwithstanding  anything to the  contrary in this  Agreement,
(A) commencing ninety (90) days after the effectiveness of a Shelf  Registration
Statement,  the Company may, not more than once in any 12-month period,  and one
additional  time  during  the term of this  Agreement  (but not during any other
Suspension  Event or within  ninety  (90) days  after  termination  of any other
Suspension Event), direct the Holders to suspend sales of Registrable Securities
registered  thereunder,  as  provided  herein,  if one or more of the  following
events (a "Suspension  Event") occurs:  (i) an underwritten  primary offering by
the Company where the Company is advised by the Managing Underwriter(s) for such
offering  that sale of  Registrable  Securities  under  the  Shelf  Registration
Statement would have a material adverse effect on the primary offering,  or (ii)
pending  negotiations  relating  to, or  consummation  of, a material  corporate
transaction (x) that would require additional disclosure of material information
by the Company in the Shelf Registration  Statement (or such filings), (y) as to
which  the  Company   has  a  bona  fide   business   purpose   for   preserving
confidentiality  and (z) which  renders  the  Company  unable to comply with SEC
requirements, in each case under circumstances that would make it impractical or
inadvisable  to cause the Shelf  Registration  Statement  (or such  filings)  to
become  effective  or to promptly  amend or  supplement  the Shelf  Registration
Statement on a post-effective basis, as applicable; and (B) the Company may, not
more than once during the term of this Agreement,  direct the Holders to suspend
sales of Registrable Securities registered thereunder,  as provided herein, upon
the  commencement  (or  such  earlier  date  as may be  required  by  law) of an
underwritten  secondary  offering  covering  not less  than  5,250,000  Series C
Securities,  with an aggregate  minimum Market Value of $75,000,000 (a "Series C
Offering Event").

                  In the case of a Suspension Event, the Company may give notice
(a  "Suspension  Notice")  to the  Holders to suspend  sales of the  Registrable
Securities  so that the  Company  may  correct or update the Shelf  Registration
Statement (or such  filings).  Each such  suspension  shall continue only for so
long as the Suspension  Event or its effect is continuing,  and in no event will
any such suspension  exceed ninety (90) days. In the case of a Series C Offering
Event,  the Company may give notice (also a "Suspension  Notice") to the Holders
to suspend sales of Registrable Securities for so long as the Company reasonably
determines  is necessary and in no event shall such  suspension  exceed the date
one  hundred  and  eighty  (180)  days  after the close of the Series C Offering
Event.  The Holders agree that they will not effect any sales of the Registrable
Securities  

                                      -15-

<PAGE>

pursuant  to such Shelf  Registration  Statement  (or such  filings) at any time
after they have received a Suspension Notice from the Company. If so directed by
the Company,  Holders  will deliver to the Company all copies of the  prospectus
covering the  Registrable  Securities held by them at the time of receipt of the
Suspension Notice. The Holders may recommence effecting sales of the Registrable
Securities  pursuant  to the  Shelf  Registration  Statement  (or such  filings)
following further notice to such effect (an "End of Suspension Notice") from the
Company,  which End of  Suspension  Notice  shall,  in the case of a  Suspension
Event, be given by the Company not later than five (5) days after the conclusion
of any Suspension  Event and shall be accompanied by copies of the  supplemented
or amended prospectus  necessary to resume such sales. In the case of a Series C
Offering Event, the holders may recommence effecting sales immediately following
the conclusion of the one hundred and eighty (180) day period.

                  Notwithstanding  Section  2,  if  the  Company  shall  give  a
Suspension  Notice  pursuant  to this  Section 7, the Company  shall  extend the
period  during  which  the  Shelf  Registration  Statement  shall be  maintained
effective  pursuant  to this  Agreement  by the number of days during the period
from the date of the giving of the  Suspension  Notice to and including the date
when the Holders shall have received the End of Suspension  Notice and copies of
the supplemented or amended prospectus necessary to resume sales.

         8.       Indemnification.
                  ---------------

                  8(a)   Indemnification  by  the  Company.  The  Company  shall
indemnify,   to  the  extent  permitted  by  law,  each  Holder  of  Registrable
Securities,  each Person who controls such Holder (within the meaning of Section
15 of the Securities Act or Section 20 of the Exchange Act) and their respective
officers, directors,  partners,  employees, agents and representatives,  against
all Losses  caused by any untrue or alleged  untrue  statement of material  fact
contained in any registration statement, prospectus or preliminary prospectus or
any amendment thereof or supplement  thereto or any omission or alleged omission
of a  material  fact  required  to be stated  therein or  necessary  to make the
statements  therein,  in  light  of the  circumstances  under  which  made,  not
misleading,  except  insofar  as the  same are  caused  by or  contained  in any
information furnished in writing to the Company by such Holder expressly for use
therein  or by such  Holder's  failure  to  deliver  a copy of the  registration
statement or  prospectus  or any  amendments  or  supplements  thereto after the
Company has furnished such Holder with a sufficient number of copies of the same
and except  insofar as the same are caused by or contained in any  prospectus if
such Holder  failed to send or deliver a copy of any  subsequent  prospectus  or
prospectus  supplement  which would have corrected such untrue or alleged untrue
statement of material  fact or such  omission or alleged  omission of a material
fact with or prior to the delivery of written  confirmation  of the sale by such
Holder after the Company has furnished  such Holder with a sufficient  number of
copies of the same. In connection  with an  Underwritten  Offering,  the Company
will indemnify  such  Underwriters,  each Person who controls such  Underwriters
(within  the  meaning of Section 15 of the  Securities  Act or Section 20 of the
Securities  Exchange Act) and their respective  officers,  directors,  partners,
employees,  agents and representatives to the same extent as provided above with
respect to the indemnification of the Holders of Registrable Securities.

                                      -16-

<PAGE>


                  8(b)  Indemnification  by  Holders.  In  connection  with  any
registration   statement  in  which  Holders  of   Registrable   Securities  are
participating,  each such  Holder will  furnish to the  Company in writing  such
information as the Company  reasonably  requests for use in connection  with any
such  registration  statement or prospectus and, to the extent permitted by law,
will  indemnify  the Company,  each Person who controls the Company  (within the
meaning of Section 15 of the  Securities  Act or Section 20 of the Exchange Act)
and their  respective  officers,  directors,  partners,  employees,  agents  and
representatives  against  any Losses  arising out of or based upon any untrue or
alleged  untrue  statement  of a material  fact  contained  in any  registration
statement,  prospectus,  or form of prospectus,  or arising out of or based upon
any  omission  or alleged  omission  of a material  fact  required  to be stated
therein  or  necessary  to  make  the  statements   therein,  in  light  of  the
circumstances  under which made, not misleading,  to the extent, but only to the
extent,  that such untrue or alleged  untrue  statement is contained in, or such
omission or alleged  omission is required to be contained in, any information so
furnished  in writing by such  Holder to the Company  expressly  for use in such
registration  statement or  prospectus  and that such  statement or omission was
relied  upon by the  Company  in  preparation  of such  registration  statement,
prospectus  or form of  prospectus;  provided,  however,  that  such  Holder  of
Registrable  Securities  shall not be liable in any such case to the extent that
the Holder has  furnished  in writing to the Company  prior to the filing of any
such  registration  statement or prospectus  or amendment or supplement  thereto
information  expressly for use in such  registration  statement or prospectus or
any amendment or  supplement  thereto  which  corrected or made not  misleading,
information  previously  furnished  to the  Company,  and the Company  failed to
include such information therein. In no event shall the liability of any selling
Holder of Registrable  Securities hereunder be greater in amount than the dollar
amount of the proceeds (net of payment of all expenses)  received by such Holder
upon the sale of the Registrable  Securities giving rise to such indemnification
obligation.  Such indemnity shall remain in full force and effect  regardless of
any investigation made by or on behalf of such indemnified party.

                  8(c)  Conduct of  Indemnification  Proceedings.  If any Person
shall be entitled  to  indemnity  hereunder  such  indemnified  party shall give
prompt notice to the party or parties from which such indemnity is sought of the
commencement  of any  Proceeding  with respect to which such  indemnified  party
seeks indemnification or contribution pursuant hereto;  provided,  however, that
the  failure  to so  notify  the  indemnifying  parties  shall not  relieve  the
indemnifying  parties from any obligation or liability except to the extent that
the indemnifying  parties have been prejudiced by such failure. The indemnifying
parties  shall  have the  right,  exercisable  by  giving  written  notice to an
indemnified  party  promptly  after the  receipt  of  written  notice  from such
indemnified party of such Proceeding,  to assume,  at the indemnifying  parties'
expense,   the  defense  of  any  such  Proceeding,   with  counsel   reasonably
satisfactory to such indemnified party;  provided,  however, that an indemnified
party or  parties  (if more  than  one  such  indemnified  party is named in any
Proceeding)  shall  have  the  right  to  employ  separate  counsel  in any such
Proceeding and to participate in the defense thereof,  but the fees and expenses
of such  counsel  shall be at the expense of such  indemnified  party or parties
unless the parties to such  Proceeding  include  both the  indemnified  party or
parties and the indemnifying party or parties,  and there exists, in the opinion
of the parties' counsel, a conflict between one or more indemnifying parties and
one or more indemnified  parties,

                                      -17-

<PAGE>



in which case the  indemnifying  parties shall,  in connection with any one such
Proceeding or separate but substantially  similar or related  Proceedings in the
same jurisdiction, arising out of the same general allegations or circumstances,
be  liable  for the fees and  expenses  of not more  than one  separate  firm of
attorneys  (together  with  appropriate  local  counsel)  at any  time  for such
indemnified  party or parties.  If an indemnifying  party assumes the defense of
such Proceeding, the indemnifying,  parties will not be subject to any liability
for any settlement  made by the  indemnified  party without its or their consent
(such consent not to be unreasonably withheld).

                  8(d) Contribution. If the indemnification provided for in this
Section 7 is unavailable to an indemnified party or is insufficient to hold such
indemnified  party  harmless  for any Losses in respect of which this  Section 8
would otherwise apply by its terms, then each applicable  indemnifying party, in
lieu of  indemnifying  such  indemnified  party,  shall  have an  obligation  to
contribute to the amount paid or payable by such  indemnified  party as a result
of such Losses,  in such  proportion as is  appropriate  to reflect the relative
fault of the indemnifying party, on the one hand, and such indemnified party, on
the other hand, in  connection  with the actions,  statements or omissions  that
resulted in such Losses as well as any other relevant equitable  considerations.
The relative fault of such indemnifying  party, on the one hand, and indemnified
party,  on the other hand,  shall be  determined  by  reference  to, among other
things,  whether any action in question,  including any untrue or alleged untrue
statement of a material fact or omission or alleged omission to state a material
fact,  has  been  taken  by,  or  relates  to  information   supplied  by,  such
indemnifying  party or  indemnified  party,  and the parties'  relative  intent,
knowledge,  access to information and opportunity to correct or prevent any such
action, statement or omission. The amount paid or payable by a party as a result
of any  Losses  shall be deemed to include  any legal or other fees or  expenses
incurred by such party in  connection  with any  Proceeding,  to the extent such
party would have been  indemnified  for such expenses under Section 8(c), if the
indemnification  provided for in Section  8(a) or Section 8(b) was  available to
such party.  The parties hereto agree that it would not be just and equitable if
contribution  pursuant  to  this  Section  8(d)  were  determined  by  pro  rata
allocation  or by any other method of  allocation  that does not take account of
the equitable considerations referred to in the immediately preceding paragraph.
Notwithstanding  the provisions of this Section 8(d), an indemnifying party that
is a  selling  Holder  of  Registrable  Securities  shall  not  be  required  to
contribute any amount in excess of the amount by which the net proceeds received
by  such  indemnifying  party  exceeds  the  amount  of any  damages  that  such
indemnifying  party has otherwise been required to pay by reasons of such untrue
or alleged untrue statement or omission or alleged omission.  No person adjudged
guilty of fraudulent  misrepresentation  (within the meaning of Section 11(f) of
the Securities  Act) shall be entitled to  contribution  from any Person who was
not guilty of such fraudulent misrepresentation.

         9.       Miscellaneous.
                  ------------
                  9(a) Amendments and Waivers. The provisions of this Agreement,
including  the  provisions  of this  sentence,  may not be amended,  modified or
supplemented,  and waivers or consents to departures from the provisions  hereof
may not be given  unless the Company  has  obtained  the written  consent of the
Holders of a majority of the Registrable Securities;  provided, however, that 

                                      -18-

<PAGE>



no amendment,  modification  or supplement or waiver or consent to the departure
with respect to the provisions of Section 2, Section 3, Section 4, Section 7, or
Section 8 hereof  shall be  effective  as  against  any  Holder  of  Registrable
Securities  unless  consented  to in  writing  by  such  Holder  of  Registrable
Securities.

                  9(b) Notices.  All notices and other  communications  provided
for or permitted hereunder shall be made in writing by hand-delivery, registered
first-class  mail,  telex,  telecopier,  or any courier  guaranteeing  overnight
delivery (i) if to a Holder, at the most current address given by such Holder to
the Company by means of a notice given in accordance with the provisions of this
Section  9(b) (ii) if to the Company,  at 2440  Research  Boulevard,  Suite 400,
Rockville,  MD 20850,  Attention:  General Counsel, and thereafter at such other
address,  notice of which is given in  accordance  with the  provisions  of this
Section 9(b).

         All such notices and  communications  shall be deemed to have been duly
given:  at the time  delivered by hand, if personally  delivered;  five business
days after  being  deposited  in the mail,  postage  prepaid,  if  mailed;  when
answered back, if telexed; when receipt is acknowledged,  if telecopied;  and on
the  next  business  day if  timely  delivered  to an air  courier  guaranteeing
overnight delivery.

                  9(c) Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the  successors,  assigns and transferees of each
of the  parties,  including,  without  limitation  and  without  the need for an
express assignment, subsequent Holders. If any successor, assignee or transferee
of any Holder shall acquire Registrable  Securities,  in any manner,  whether by
operation of law or otherwise, such Registrable Securities shall be held subject
to the terms of this  Agreement,  and by taking  and  holding  such  Registrable
Securities  such Person  shall be entitled  to receive the  benefits  hereof and
shall be conclusively  deemed to have agreed to be bound by all of the terms and
provisions  hereof.  Notwithstanding  the foregoing,  only Matra, as a Holder of
Registrable Securities, may request an Underwritten Offering pursuant to Section
3(a) with respect to Registrable  Securities with a Market Value, as of the date
of such request, of less than $20 million.

                  9(d)  Counterparts.  This  Agreement  may be  executed  in any
number of counterparts and by the parties hereto in, separate counterparts, each
of which when so  executed  shall be deemed to be an  original  and all of which
taken together shall constitute one and the same agreement.

                  9(e)  Headings.   The  headings  in  this  Agreement  are  for
convenience  of  reference  only and  shall not limit or  otherwise  affect  the
meaning hereof.

                  9(f) Governing Law;  Consent to  Jurisdiction.  THIS AGREEMENT
AND THE DUTIES AND  OBLIGATIONS  OF THE PARTIES  HERETO SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF DELAWARE, WITHOUT
GIVING EFFECT TO THE CONFLICTS OF LAW  PROVISIONS  THEREOF.  EACH OF THE PARTIES
HERETO AGREES TO SUBMIT TO THE  NON-EXCLUSIVE  JURISDICTION OF THE COURTS OF THE
STATE OF DELAWARE IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS
AGREEMENT.

                                      -19-

<PAGE>

                  9(g)  Severability.  In the event  that any one or more of the
provisions contained herein, or the application thereof in any circumstance,  is
held   invalid,   illegal  or   unenforceable,   the   validity,   legality  and
enforceability of any such provision in every other respect and of the remaining
provisions contained herein shall not be affected or impaired thereby.

                  9(h) Specific Performance. The parties hereto acknowledge that
there  would be no  adequate  remedy at law if any party fails to perform any of
its obligations hereunder, and accordingly agree that each party, in addition to
any  other  remedy to which it may be  entitled  at law or in  equity,  shall be
entitled to compel  specific  performance of the  obligations of any other party
under  this  Agreement  in  accordance  with the  terms and  conditions  of this
Agreement  in any court of the United  States of  America  or any State  thereof
having jurisdiction.

                  9(i)  Entire  Agreement.  This  Agreement  is  intended by the
parties as a final  expression of their  agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto
in respect of the subject matter contained herein. This Agreement  supersedes an
prior oral or written  agreements,  commitments  or  understandings  between the
parties with respect to the matters provided for herein.


                                      -20-

<PAGE>



         IN WITNESS WHEREOF,  the parties have executed this Agreement as of the
date first written above.

                                 ORION NEWCO SERVICES, INC.


                                 By:
                                        -------------------------------
                                        Name:
                                        Title:


                                 BRITISH AEROSPACE HOLDINGS,
                                 INC.


                                 By:
                                        -------------------------------
                                        Name:
                                        Title:


                                 MATRA MARCONI SPACE
                                 UK LIMITED


                                 By:
                                        --------------------------------
                                        Name:
                                        Title:







                                      -21-


                                                                    EXHIBIT 21.1

                                      ORION
                                SUBSIDIARIES LIST
                                -----------------


Orion Network Systems, Inc.*

Orion Satellite Corporation

International Private Satellite Partners, L.P.

OrionNet, Inc.

Orion Asia Pacific Corporation

Asia Pacific Space and Communications, Ltd.

Orion Atlantic Europe, Inc.

OrionNet Finance Corporation


- ---------------
*The issuer of the Units is a newly-formed  Delaware corporation presently named
  Orion Newco  Services,  Inc. The issuer will become the parent holding company
  of the existing public company,  Orion Network Systems, Inc. ("Old ONSI"), and
  will change its name to Orion  Network  Systems,  Inc., at which time Old ONSI
  will change its name to_____________________.





                                                                 EXHIBIT 23.1(A)

                         CONSENT OF INDEPENDENT AUDITORS

We consent to the references to our firm under the captions "Summary: The Merger
- - Certain Federal Income Tax Consequences of the Merger," "Summary: The Exchange
- -  Conditions  to  Closing,"  "The  Merger,   The  Exchange  and  the  Debenture
Investments:   Background   of  the  Merger   Transactions   and  the  Debenture
Investments,"  "The  Merger,  The Exchange and the  Debenture  Investments:  The
Merger Agreement - Conditions to Obligations to Effect the Merger," "The Merger,
The Exchange and the Debenture Investments:  The Exchange Agreement - Results of
the Exchange - Conditions to the  Exchange,"  "The Merger,  The Exchange and the
Debenture  Investments:  Certain Federal Income Tax Consequences," and "Experts"
and to the use of our  report  dated  February  9, 1996,  included  in the Proxy
Statement of Orion Network Systems, Inc. that is made a part of the Registration
Statement (Form S-4 No. 333-xxxxx) and Prospectus of Orion Network Systems, Inc.
dated January 14, 1997.

                                                  ERNST & YOUNG LLP

Washington, D.C.
January 10, 1997




                                                               [Draft--01/06/97]



                         Consent of Salomon Brothers Inc
                         -------------------------------


         We hereby  consent  to the use of our name and the  description  of our
opinion letter,  dated December 10, 1996,  under the caption "THE MERGER AND THE
EXCHANGE--Opinion of Orion's Financial Advisor" in, and to the inclusion of such
opinion  letter as  Attachment  C to,  the Proxy  Statement/Prospectus  of Orion
Network  Systems,  Inc.,  which  Proxy   Statement/Prospectus  is  part  of  the
Registration  Statement  on Form S-4 (file  number - ) of Orion Newco  Services,
Inc. By giving such  consent we do not  thereby  admit that we are experts  with
respect to any part of such  Registration  Statement  within the  meaning of the
term  "expert" as used in, or that we come within the category of persons  whose
consent is required under, the Securities Act of 1933, as amended,  or the rules
and   regulations  of  the  Securities  and  Exchange   Commission   promulgated
thereunder.


                                              SALOMON BROTHERS INC



                                              By________________________________
                                                 Managing Director


New York, New York

January _____, 1997



                                                                  ATTACHMENT D

                               SALOMON BROTHERS

December 10, 1996

Orion Network Systems, Inc.
2440 Research Boulevard
Suite 400
Rockville, MD 20850

Dear Sirs:

   You have requested our opinion,  as investment  bankers,  as to the fairness,
from a financial point of view, to Orion Network Systems, Inc. ("Orion"), of the
consideration  to be paid by Orion in  connection  with the Exchange (as defined
below). Pursuant to a Section 351 Exchange Agreement and Plan of Conversion (the
"Exchange Agreement") with Orion Satellite  Corporation,  a Delaware corporation
that is a wholly owned  subsidiary  of Orion  ("OrionSat")  and the sole general
partner of International  Private Satellite  Partners,  L.P., a Delaware limited
partnership  ("Orion  Atlantic"),  and each of the existing  limited partners of
Orion Atlantic other than Orion (the "Exchanging  Partners"),  Orion has agreed,
among other things, to have Orion Newco Services,  Inc., a newly formed Delaware
corporation  with a certificate  of  incorporation,  bylaws,  capital  structure
(before the issuance of the Newco  Preferred Stock defined below) and management
substantially  identical  in all  material  respects  to those of Orion  ("Orion
Newco"),  issue  121,988  shares  of  Orion  Newco's  Series  C 6%  Cumulative
Redeemable Convertible Preferred Stock (the "Newco Preferred Stock") in exchange
for the Exchanging  Partners' limited partnership  interests in Orion Atlantic
and other rights relating thereto (the "Exchange").  The Exchange is intended to
qualify as tax-free  under Section 351 of the Internal  Revenue Code of 1986, as
amended.  As a result of the Exchange,  Orion Newco will become the owner of all
the  partnership  interests in Orion Atlantic  (through Orion Newco and Orion as
limited partners and OrionSat as the sole general partner of Orion Atlantic). In
addition,  Orion  Newco  will  acquire  certain  rights  currently  held  by the
Exchanging  Partners,  including rights to receive repayment of various advances
(aggregating  approximately  $37.6  million at September 30, 1996) made to Orion
Atlantic.  The 121,988 shares of Newco  Preferred Stock expected to be issued in
the Exchange will be convertible into  approximately  6.9971 million (assuming a
closing  of the  Exchange  as of January  30,  1997;  the number of shares  will
increase if the closing  occurs  after that date)  shares of common  stock,  par
value $.01 per share, of Orion Newco ("Orion Newco Common Stock").

   We understand that concurrently with, and as a condition to, the consummation
of  the  Exchange,  (i)  Orion  Newco  intends  to  consummate  financings  (the
"Financings") consisting of (a) notes and warrants with expected net proceeds of
approximately  $250  million to refinance  the  indebtedness  of Orion  Atlantic
outstanding  under the existing  Credit  Agreement  dated December 6, 1991 among
Orion  Atlantic,  the banks named  therein and Chase  Manhattan  Bank  (National
Association), as agent (the "Orion 1 Credit Facility"), and to release Orion's
and the Exchanging Limited Partners'  (including their respective  affiliates)
existing commitments and guarantees supporting the Orion 1 Credit Facility,  (b)
the  issuance  and  sale  of  approximately   $50  million  of  Orion  Newco's
convertible subordinated debentures to British Aerospace Public Limited Company,
an affiliate of one of the Exchanging Partners and (c) the execution by Orion or
one of its affiliates of an amendment to the satellite procurement contract with
Matra  Marconi Space U.K.  Limited for the Orion 2 satellite,  which was entered
into in July 1996 and is expected to include an agreement by the manufacturer to
commence  construction of the Orion 2 satellite based upon a $40 million initial
payment,  and (ii) a wholly-owned  subsidiary of Orion Newco will be merged with
and into Orion in a tax-free  reorganization  (the  "Merger").  We have not been
asked to express an opinion,  and we do not express any opinion,  with regard to
the Financings or the Merger.

   In arriving at our  opinion,  we have  reviewed  certain  publicly  available
business and financial  information  relating to Orion, as well as certain other
information,  including financial projections,  provided to us by Orion. We have
discussed the past and current operations and financial condition and prospects

                                       D-1

<PAGE>
of Orion and Orion Atlantic with members of the respective  senior management of
such  entities.  We have  also  considered  such  other  information,  financial
studies,  analyses,  investigations and financial,  economic, market and trading
criteria which we deemed relevant.

   We  have  assumed  and  relied  on  the  accuracy  and  completeness  of  the
information  reviewed  by us for the  purpose  of this  opinion  and we have not
assumed any responsibility  for independent  verification of such information or
for any  independent  evaluation  or  appraisal  of the assets of Orion or Orion
Atlantic.   With  respect  to  Orion's   and  Orion   Atlantic's   financial
projections,  we have assumed that they have been  reasonably  prepared on bases
reflecting the best currently available estimates and judgments of Orion's and
Orion  Atlantic's  management,  as the case may be, as to the future financial
performance of such entity, and while we express no opinion with respect to such
forecasts  or the  assumptions  on  which  they are  based,  we have  relied  on
management's  assumption that the Financings will occur  concurrently with the
Exchange.

   Our opinion is necessarily  based upon business,  market,  economic and other
conditions as they exist on, and can be evaluated as of, the date of this letter
and does not  address  Orion's  underlying  business  decision  to effect  the
Exchange or constitute a  recommendation  to any holder of Orion common stock as
to how such holder should vote with respect to the Merger or the  Exchange.  Our
opinion  as  expressed  below  does not imply any  conclusion  as to the  likely
trading range for the Orion Newco Common Stock following the consummation of the
Exchange,  which may vary depending on, among other factors, changes in interest
rates, dividend rates, market conditions,  general economic conditions and other
factors that generally influence the price of securities.

   We have  acted as  financial  advisor to the Board of  Directors  of Orion in
connection  with the Exchange and will receive a fee for our  services,  part of
which was paid upon execution by Orion of the engagement  agreement with respect
to the  Exchange,  part of which is payable upon the initial  submission of this
opinion  and  the  remainder  of  which  is  payable  upon  consummation  of the
Financings.  In the  ordinary  course of our  business,  we  actively  trade the
securities  of Orion for our own account and for the accounts of customers  and,
accordingly, may at any time hold a long or short position in such securities.

   Based upon and  subject to the  foregoing,  it is our  opinion as  investment
bankers  that,  as of the  date  hereof,  the  consideration  to be  paid in the
Exchange is fair, from a financial point of view, to Orion.

Very truly yours,

SALOMON BROTHERS INC

                                      D-2


REVOCABLE PROXY 

                         ORION NETWORK SYSTEMS, INC. 
         THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS 

     The   undersigned   stockholder  of  Orion  Network   Systems,   Inc.  (the
"Corporation") hereby appoints John G. Puente, W. Neil Bauer, David J. Frear and
Richard H. Shay, or any of them, attorneys and proxies of the undersigned,  with
full  power of  substitution  and with  authority  in each of them to act in the
absence of the other,  to vote and act for the  undersigned  stockholder  at the
Special Meeting of Stockholders to be held at 9:00 a.m.,  local time, on January
30, 1997, at 2440 Research Boulevard, Suite 400, Rockville, Maryland, and at any
adjournments thereof, upon the following matters:

Proposal  1:  Ratification  of the  Agreement  and Plan of  Merger,  dated as of
January 8, 1997,  among  Orion  Network  Systems,  Inc.  ("Orion"),  Orion Newco
Services,  Inc. ("Orion Newco"), a newly formed Delaware corporation,  and Orion
Merger  Company,  Inc., a newly formed  Delaware  corporation and a wholly owned
subsidiary of Orion Newco, and the transactions contemplated thereby. 
[  ] FOR [  ]AGAINST [  ] ABSTAIN

Proposal 2: Approval and adoption of the Section 351 Exchange Agreement and Plan
of Conversion,  dated as of June 1996, as amended,  among Orion, Orion Satellite
Corporation,  a Delaware  corporation that is a wholly owned subsidiary of Orion
and the sole general partner of International Private Satellite Partners,  L.P.,
a Delaware  limited  partnership  ("Orion  Atlantic"),  and each of the existing
limited  partners  of Orion  Atlantic  other than  Orion,  and the  transactions
contemplated thereby. [  ] FOR [  ]AGAINST [  ] ABSTAIN

Proposal 3: Approval of the Debenture Investments,  among Orion, Orion Newco and
each of British Aerospace Holdings, Inc. and Matra Marconi Space UK Limited. [ ]
FOR [ ]AGAINST [ ] ABSTAIN


This proxy  will be voted as  directed  by the  undersigned  stockholder.  IF NO
DIRECTION  IS  GIVEN,  THIS  PROXY  WILL BE VOTED FOR  PROPOSALS  1, 2 AND 3. In
addition,  this proxy may be voted upon such other business as may properly come
before the Special Meeting or any adjournments or  postponements  thereof as may
be  determined  by a  majority  of  the  Corporation's  Board  of  Directors.The
undersigned  stockholder may revoke this proxy at any time before it is voted by
delivering to the Secretary of the  Corporation  either a written  revocation of
the proxy or a duly executed  proxy bearing a later date, or by appearing at the
Special  Meeting  and  voting in  person.  The  undersigned  stockholder  hereby
acknowledges   receipt   of   notice   of  the   Special   Meeting   and   Proxy
Statement/Prospectus  dated  January  5, 1997 and  hereby  revokes  any proxy or
proxies heretofore given.

     If you receive  more than one proxy card,  please sign and return all cards
in the accompanying envelope.

              (Continued and to be dated and signed on reverse side) 

                           (Continued from other side) 

     PLEASE  MARK,  DATE AND SIGN THIS PROXY AND RETURN IT  PROMPTLY TO ENSURE A
QUORUM AT THE  SPECIAL  MEETING.  IT IS  IMPORTANT  WHETHER  YOU OWN FEW OR MANY
SHARES. DELAY IN RETURNING YOUR PROXY MAY SUBJECT ORION TO ADDITIONAL EXPENSE.

Date:   , 1997 
                         (Signature of Stockholder or 
                          Authorized Representative) 
                                 (Print name) 

     Please  date  and sign  exactly  as name  appears  hereon.  Each  executor,
administrator,  trustee,  guardian,  attorney-in-fact and other fiduciary should
sign and indicate his or her full title.  In the case of stock  ownership in the
name of two or more persons, both persons should sign.

  [  ] I PLAN TO ATTEND THE JANUARY 30, 1997 SPECIAL STOCKHOLDERS MEETING 


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