COMSAT CORP
S-3/A, 1995-07-07
COMMUNICATIONS SERVICES, NEC
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<PAGE>
   
      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 7, 1995
    
                                                       REGISTRATION NO. 33-59841
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ----------------
   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-3
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                                 --------------

   
<TABLE>
<S>                                    <C>                  <C>
       COMSAT CAPITAL I, L.P.                                        COMSAT CORPORATION
    (Exact Name of Registrant as                                (Exact Name of Registrant as
     Specified in Certificate of                                    Specified in Charter)
        Limited Partnership)
              DELAWARE                                              DISTRICT OF COLUMBIA
                 (State or Other Jurisdiction of Incorporation or Organization)
             52-1928675                                                  52-0781863
                              (I.R.S. Employer Identification No.)
       6560 ROCK SPRING DRIVE                                      6560 ROCK SPRING DRIVE
         BETHESDA, MD 20817                                          BETHESDA, MD 20817
           (301) 214-3000                                              (301) 214-3000
</TABLE>
    

  (Address, Including Zip Code, and Telephone Number, Including Area Code, of
                   Registrants' Principal Executive Offices)

                             WARREN Y. ZEGER, ESQ.
                 VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY
                               COMSAT CORPORATION
                             6560 ROCK SPRING DRIVE
                               BETHESDA, MD 20817
                                 (301) 214-3000
           (Name, Address, Including Zip Code, and Telephone Number,
                   Including Area Code, of Agent for Service)

                                WITH COPIES TO:

<TABLE>
<S>                                                      <C>
               William P. O'Neill, Esq.                               Robert E. Buckholz, Jr., Esq.
                   Crowell & Moring                                        Sullivan & Cromwell
            1001 Pennsylvania Avenue, N.W.                                  125 Broad Street
                Washington, D.C. 20004                                  New York, New York 10004
                    (202) 624-2500                                           (212) 558-4000
</TABLE>

   
    APPROXIMATE  DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: AS SOON AS
PRACTICABLE AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
    
                                ----------------
    If the  only securities  being registered  on this  Form are  being  offered
pursuant  to dividend or interest reinvestment plans, please check the following
box. / /

   
    If any of the securities being registered on this Form are to be offered  on
a  delayed or continuous basis pursuant to  Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, please check the following box. / /
    
   
    If this Form  is filed  to register  additional securities  for an  offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and  list  the  Securities  Act registration  statement  number  of  the earlier
effective registration statement for the same offering. / /
    
   
    If this Form  is a post-effective  amendment filed pursuant  to Rule  462(c)
under  the Securities Act, check  the following box and  list the Securities Act
registration statement number  of the earlier  effective registration  statement
for the same offering. / /
    
   
    If  delivery of the prospectus is expected  to be made pursuant to Rule 434,
please check the following box. / /
    
                                ----------------

   
    THE REGISTRANTS HEREBY  AMEND THIS  REGISTRATION STATEMENT ON  SUCH DATE  OR
DATES  AS MAY  BE NECESSARY  TO DELAY ITS  EFFECTIVE DATE  UNTIL THE REGISTRANTS
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>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
   
                   SUBJECT TO COMPLETION, DATED JULY 7, 1995
    

   
                         8,000,000 PREFERRED SECURITIES
                                COMSAT CAPITAL I
           % CUMULATIVE MONTHLY INCOME PREFERRED SECURITIES (MIPS-SM-*)
              (LIQUIDATION PREFERENCE $25 PER PREFERRED SECURITY)
                  GUARANTEED TO THE EXTENT SET FORTH HEREIN BY
    

                                     [LOGO]
                                 --------------

    The                 % Cumulative  Monthly Income  Preferred Securities  (the
"Preferred  Securities")  representing  the  limited  partner  interests offered
hereby are being issued by COMSAT Capital I, L.P., a limited partnership  formed
under   the  laws  of  the  State  of  Delaware  ("COMSAT  Capital  I").  COMSAT
Corporation, a  District  of Columbia  corporation  ("COMSAT"), is  the  general
partner  in COMSAT Capital  I (in such capacity,  the "General Partner"). COMSAT
Capital I exists for  the sole purpose of  issuing the Preferred Securities  and
using  the proceeds thereof to purchase from  COMSAT its   % Junior Subordinated
Deferrable Interest Debentures  (the "Junior  Subordinated Debentures"),  having
the  terms described  herein. The limited  partner interests  represented by the
Preferred Securities will have a  preference with respect to cash  distributions
and amounts payable on liquidation over the General Partner's interest in COMSAT
Capital I.

                                                        (CONTINUED ON NEXT PAGE)
                                ----------------

    SEE  "RISK FACTORS"  ON PAGE  6 OF  THIS PROSPECTUS  FOR CERTAIN INFORMATION
RELEVANT TO AN INVESTMENT IN THE PREFERRED SECURITIES, INCLUDING THE PERIOD  AND
CIRCUMSTANCES  DURING AND UNDER  WHICH PAYMENTS ON  THE PREFERRED SECURITIES AND
JUNIOR SUBORDINATED DEBENTURES MAY  BE DEFERRED AND  THE RELATED FEDERAL  INCOME
TAX CONSEQUENCES.
                                 -------------

THESE  SECURITIES 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   PROSPECTUS.
           ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                                 --------------

   
<TABLE>
<CAPTION>
                                                       INITIAL PUBLIC     UNDERWRITING          PROCEEDS TO
                                                       OFFERING PRICE    COMMISSION (1)   COMSAT CAPITAL I (2)(3)
                                                       ---------------  ----------------  ------------------------
<S>                                                    <C>              <C>               <C>
Per Preferred Security...............................      $25.00             (2)                  $25.00
Total................................................   $200,000,000          (2)               $200,000,000
<FN>
- ----------------
(1)  COMSAT   Capital  I  and  COMSAT  have  agreed  to  indemnify  the  several
     Underwriters against certain liabilities,  including liabilities under  the
     Securities Act of 1933, as amended. See "Underwriting".
(2)  In  view  of  the fact  that  the proceeds  of  the sale  of  the Preferred
     Securities will ultimately be  invested in Junior Subordinated  Debentures,
     the   Underwriting  Agreement  provides   that  COMSAT  will   pay  to  the
     Underwriters, as compensation for their arranging the investment therein of
     such proceeds, $      per Preferred Security (or $      in the  aggregate).
     See "Underwriting".
(3)  Expenses  of the offering which  are payable by COMSAT  are estimated to be
     $580,000.
</TABLE>
    

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

    The Preferred  Securities  offered  hereby  are  offered  severally  by  the
Underwriters, as specified herein, and subject to receipt and acceptance by them
and  subject to  their right  to reject  any order  in whole  or in  part. It is
expected that  delivery  of  the  Preferred Securities  will  be  made  only  in
book-entry  form through the facilities of DTC,  New York, New York, on or about
         , 1995.

- ----------------
*MIPS is a servicemark of Goldman, Sachs & Co.

GOLDMAN, SACHS & CO.                                           SMITH BARNEY INC.

   
CS FIRST BOSTON                                         PAINEWEBBER INCORPORATED
    
                                   ---------

                The date of this Prospectus is          , 1995.
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)

    Holders of the Preferred Securities  will be entitled to receive  cumulative
cash distributions at an annual rate of   % of the liquidation preference of $25
per  Preferred Security, accruing from the date of original issuance and payable
monthly in  arrears  on the  last  day of  each  calendar month  of  each  year,
commencing             , 1995. See  "Description of the  Preferred Securities --
Dividends". The payment of dividends (but only if and to the extent declared out
of moneys held by COMSAT Capital I and legally available therefor), and payments
on liquidation of COMSAT Capital I or the redemption of Preferred Securities, as
set forth below, are  guaranteed by COMSAT to  the extent described herein  (the
"Guarantee").  COMSAT's  obligations  under the  Guarantee  are  subordinate and
junior in right  to all other  liabilities of COMSAT  (other than certain  other
guarantees).  See  "Description  of  the Guarantee".  If  COMSAT  fails  to make
interest payments on the Junior  Subordinated Debentures, COMSAT Capital I  will
have  insufficient  funds  to pay  dividends  on the  Preferred  Securities. The
Guarantee does not  cover payment of  dividends when COMSAT  Capital I does  not
have sufficient funds to pay such dividends.

    COMSAT  has the right under the Indenture (as defined herein) for the Junior
Subordinated Debentures to extend the interest payment period from time to  time
on  the Junior Subordinated Debentures to  a period not exceeding 60 consecutive
months, and, as  a consequence,  monthly dividends on  the Preferred  Securities
would  be  deferred by  COMSAT  Capital I  (but  would continue  to  accrue with
interest) during any such extended interest payment period. See "Risk Factors --
Option to  Extend  Interest  Payment  Period",  "Description  of  the  Preferred
Securities  -- Dividends" and "Description of the Junior Subordinated Debentures
- -- Option to Extend Interest Payment Period".

    The Preferred Securities are redeemable at  the option of COMSAT Capital  I,
in  whole or in part, from time to time, on or after          , 2000, at $25 per
Preferred Security plus  accrued and  unpaid dividends thereon  (whether or  not
earned  or declared) to the date  fixed for redemption (the "Redemption Price").
See "Description of the Preferred  Securities -- Optional Redemption". Upon  the
repayment  of  the  Junior  Subordinated  Debentures  at  maturity  or  upon any
acceleration, earlier redemption or otherwise, the proceeds from such  repayment
will be applied to redeem the Preferred Securities.

    In  addition, upon the occurrence of certain events arising from a change in
law or a change in legal interpretation, the Preferred Securities are redeemable
in whole at the Redemption  Price at the option of  the General Partner, or  the
General Partner may dissolve COMSAT Capital I and cause to be distributed to the
holders  of the Preferred  Securities, on a pro  rata basis, Junior Subordinated
Debentures in  lieu  of  any  cash  distribution.  If  the  Junior  Subordinated
Debentures  are distributed to  the holders of  the Preferred Securities, COMSAT
will use its best efforts to  have the Junior Subordinated Debentures listed  on
the  New  York  Stock  Exchange  or on  such  other  exchange  as  the Preferred
Securities  are  then  listed.  The  obligations  of  COMSAT  under  the  Junior
Subordinated Debentures are subordinate and junior in right of payment to Senior
Indebtedness   (as  defined  herein)  of  COMSAT.  At  March  31,  1995,  Senior
Indebtedness of COMSAT aggregated  approximately $751 million. See  "Description
of  the Preferred Securities -- Tax Event or Investment Company Event Redemption
or Distribution" and "Description of the Junior Subordinated Debentures".

    In the event  of the liquidation  of COMSAT  Capital I, the  holders of  the
Preferred  Securities will be entitled to  receive for each Preferred Security a
liquidation preference of $25 plus accrued  and unpaid dividends thereon to  the
date of payment, subject to certain limitations, unless, in connection with such
liquidation,  Junior Subordinated Debentures  are distributed to  the holders of
the Preferred  Securities.  See  "Description of  the  Preferred  Securities  --
Liquidation Distribution Upon Dissolution".

   
    The  Preferred Securities  will be  represented by  a global  certificate or
certificates registered in the name of  The Depository Trust Company ("DTC")  or
its  nominee. Beneficial interests in the Preferred Securities will be shown on,
and transfers thereof will be effected  only through, records maintained by  the
participants  in  DTC.  Except  as  described  herein,  Preferred  Securities in
certificated form will not be issued  in exchange for the global certificate  or
certificates.  See "Description  of the Preferred  Securities -- Book-Entry-Only
Issuance -- The Depository Trust Company".
    

   
    Application has been made to list  the Preferred Securities on the New  York
Stock Exchange.
    

                                       2
<PAGE>
                             AVAILABLE INFORMATION

    COMSAT  is  subject  to  the informational  requirements  of  the Securities
Exchange Act  of 1934,  as  amended (the  "Exchange  Act"), and,  in  accordance
therewith,  files  reports,  proxy  statements and  other  information  with the
Securities and  Exchange Commission  (the  "Commission"). These  reports,  proxy
statements  and  other information  can be  inspected and  copied at  the public
reference facilities maintained  by the  Commission at 450  Fifth Street,  N.W.,
Room 1024, Washington, D.C. 20549, as well as at the following Regional Offices:
7  World Trade Center,  New York, New  York 10048; and  500 West Madison Street,
Chicago, Illinois 60661. Copies of such material can be obtained from the Public
Reference Section of the Commission at 450 Fifth Street at prescribed rates  and
can be inspected at the New York, Chicago and Pacific Stock Exchanges.

    This  Prospectus  does not  contain  all the  information  set forth  in the
Registration Statement on Form  S-3 (together with  all amendments and  exhibits
thereto, the "Registration Statement") filed by COMSAT Capital I and COMSAT with
the  Commission under  the Securities Act  of 1933, as  amended (the "Securities
Act"). Reference is made to  the Registration Statement for further  information
with  respect to  COMSAT, COMSAT  Capital I  and the  securities offered hereby.
Statements  contained  or  incorporated  by  reference  herein  concerning   the
provisions  of documents are  necessarily summaries of  such documents, and each
statement is  qualified  in  its  entirety  by  reference  to  the  Registration
Statement.

    No  separate financial  statements of  COMSAT Capital  I have  been included
herein. COMSAT  and  COMSAT  Capital  I do  not  consider  that  such  financial
statements  would be material to holders  of Preferred Securities because COMSAT
Capital I is a  newly formed special purpose  entity, has no operating  history,
has  no independent operations  and is not  engaged in, and  does not propose to
engage in, any activity  other than as  set forth below. COMSAT  Capital I is  a
limited  partnership formed under the  laws of the State  of Delaware. COMSAT is
the sole  general partner  in  COMSAT Capital  I and,  as  of the  date  hereof,
directly  or indirectly beneficially owns all  of COMSAT Capital I's partnership
interests. See "COMSAT Capital I".
                                 --------------

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
    COMSAT's Annual Report on Form 10-K  for the fiscal year ended December  31,
1994 (including Amendment No. 1 thereto on Form 10-K/A), its Quarterly Report on
Form  10-Q for the period  ended March 31, 1995  (including Amendments No. 1 and
No. 2 thereto on Form 10-Q/A), and its  Current Report on Form 8-K filed on  May
30,  1995,  as filed  with  the Commission  pursuant  to the  Exchange  Act, are
incorporated herein  by reference.  All documents  filed by  COMSAT pursuant  to
Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of
this  Prospectus and prior to the termination  of the offering of the securities
offered hereby  shall  be deemed  to  be  incorporated by  reference  into  this
Prospectus  and to be a part hereof from  the date of filing such documents. Any
statement contained  herein or  in  a document  all or  a  portion of  which  is
incorporated or deemed to be incorporated by reference herein shall be deemed to
be  modified or superseded for purposes of  this Prospectus to the extent that a
statement contained herein  or in  any other subsequently  filed document  which
also  is  or  is deemed  to  be  incorporated by  reference  herein  modifies or
supersedes such statement. Any  such statement so  modified or superseded  shall
not be deemed, except as so modified or superseded, to constitute a part of this
Prospectus.
    

    COMSAT  hereby undertakes to provide without charge to each person to whom a
copy of this Prospectus has  been delivered, on the  written or oral request  of
any  such person, including  any beneficial owner, a  copy of any  or all of the
documents referred  to above  which have  been or  may be  incorporated in  this
Prospectus  by  reference, other  than exhibits  to  such documents  unless such
exhibits are specifically  incorporated by reference  into the information  that
the  Prospectus incorporates.  Requests for  such copies  should be  directed to
Nancy E.  Weber, Assistant  Secretary  of COMSAT,  at  6560 Rock  Spring  Drive,
Bethesda, MD 20817. Ms. Weber's telephone number is (301) 214-3643.

    IN  CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH  STABILIZE OR  MAINTAIN THE  MARKET PRICE  OF THE  SECURITIES
OFFERED  HEREBY AT A LEVEL ABOVE THAT  WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN
MARKET. SUCH TRANSACTIONS MAY BE EFFECTED ON THE NEW YORK STOCK EXCHANGE, IN THE
OVER-THE-COUNTER MARKET OR  OTHERWISE. SUCH  STABILIZING, IF  COMMENCED, MAY  BE
DISCONTINUED AT ANY TIME.

                                       3
<PAGE>
   
                           FOR FLORIDA RESIDENTS ONLY
    

   
    COMSAT   is  the  U.S.  signatory  to  the  International  Mobile  Satellite
Organization ("Inmarsat"),  an  international organization  which  operates  the
satellites  of a  global mobile communications  satellite system. A  total of 76
other nations, including Cuba, are members of Inmarsat. Pursuant to the Inmarsat
Convention, which has the status of an international treaty, vessels  registered
to   any  country,  including  Cuba,  must   be  provided  access  to  satellite
communications via COMSAT's earth stations,  which results in incidental use  by
Cuban-registered  vessels. Communications  charges are  then billed  through the
Inmarsat billing system, including to parties in Cuba. This is the extent of the
business conducted by COMSAT with Cuba.  This information is accurate as of  the
date hereof. Current information concerning COMSAT's business dealings with Cuba
or  with  any person  or  affiliate located  in Cuba  may  be obtained  from the
Division of  Securities and  Investor Protection  of the  Florida Department  of
Banking  and Finance,  the Capitol,  Tallahassee, Florida  32399-0350, telephone
(904) 488-9806.
    

                                COMSAT CAPITAL I

   
    COMSAT Capital  I  is a  limited  partnership  which was  formed  under  the
Delaware  Revised  Uniform Limited  Partnership Act  (the "Partnership  Act") by
filing a certificate of limited partnership with the Delaware Secretary of State
on May 22, 1995. The initial partners in COMSAT Capital I are COMSAT, as general
partner, and  COMSAT  SPV, Inc.,  a  Delaware  corporation and  a  wholly  owned
subsidiary  of COMSAT ("COMSAT  SPV"), as limited partner.  Upon the issuance of
the Preferred Securities, which  securities represent limited partner  interests
in  COMSAT Capital I, COMSAT SPV will cease to be a limited partner. The General
Partner will contribute capital in an amount  equal to at least 3% of the  total
capital  contributions to COMSAT Capital I. COMSAT and COMSAT SPV entered into a
limited partnership agreement dated as of May 22, 1995. Such limited partnership
agreement will  be amended  and restated  in  its entirety  (as so  amended  and
restated,  the "Limited Partnership Agreement")  substantially in the form filed
as an exhibit  to the Registration  Statement of which  this Prospectus forms  a
part.
    

    COMSAT  Capital I is managed by the  General Partner and exists for the sole
purpose of issuing the Preferred  Securities and investing the proceeds  thereof
in  the  Junior Subordinated  Debentures.  The payment  by  COMSAT Capital  I of
dividends due on the Preferred Securities is solely dependent on its receipt  of
interest  payments from COMSAT on the Junior Subordinated Debentures. The rights
of the holders of the Preferred Securities, including economic rights, rights to
information and  voting  rights,  are  set  forth  in  the  Limited  Partnership
Agreement   and  the  Partnership   Act.  See  "Description   of  the  Preferred
Securities". COMSAT  Capital I  has a  term of  approximately 99  years,  unless
earlier dissolved. COMSAT Capital I's registered office in the State of Delaware
is  c/o The  Corporation Trust  Company, Corporation  Trust Center,  1209 Orange
Street,  Wilmington,  New  Castle  County,  Delaware  19801,  telephone:   (302)
658-7581.  All of COMSAT Capital  I's business and affairs  will be conducted by
COMSAT, as the sole general partner.  The principal place of business of  COMSAT
Capital I is c/o COMSAT Corporation, 6560 Rock Spring Drive, Bethesda, MD 20817,
telephone number (301) 214-3000.

                               COMSAT CORPORATION

GENERAL

    COMSAT is a global provider of communications and entertainment services and
products   primarily   operating  in   four  business   segments:  International
Communications, Mobile Communications, Entertainment and Technology Services.

   
    International  Communications  consists  of  COMSAT  World  Systems,   which
provides  satellite communications  services using  the satellite  system of the
International Telecommunications Satellite Organization ("INTELSAT"), and COMSAT
International  Ventures,  which  operates  and  invests  in   telecommunications
ventures  internationally.  Mobile  Communications  consists  of  COMSAT  Mobile
Communications, which  provides  satellite  communications  services  using  the
satellite  system of  Inmarsat. Entertainment  consists of  COMSAT Entertainment
Group, Inc.  ("CEG"), comprising  COMSAT Video  Enterprises, Inc.  and  COMSAT's
majority   ownership   interest   in  On   Command   Video   Corporation,  which
    

                                       4
<PAGE>
provide entertainment services to the hospitality industry throughout the United
States and domestic  video distribution  services to a  television network;  the
Denver  Nuggets, a franchise of the  National Basketball Association; and Beacon
Communications Corp., a producer of theatrical films and television programming.
Technology Services consists of COMSAT  RSI, Inc., which designs,  manufactures,
and  integrates satellite  earth stations,  advanced antennas  and other turnkey
systems for telecommunications,  radar, air traffic  control and military  uses,
and provides turnkey voice, video and data communications networks and products,
and  communication and information services  worldwide, and COMSAT Laboratories,
COMSAT's center for applied research and technology development.

    For the  year  ended December  31,  1994, the  International  Communications
segment  had revenues of $271  million and operating income  of $89 million; the
Mobile Communications segment had revenues of $194 million and operating  income
of  $48  million; the  Entertainment segment  had revenues  of $157  million and
operating income  of  $11  million;  and the  Technology  Services  segment  had
revenues of $219 million and operating income of $15 million.

   
    COMSAT  was  incorporated  in  1963  under  District  of  Columbia  law,  as
authorized by  the  Communications  Satellite  Act  of  1962  (as  amended,  the
"Satellite Act"). Effective June 1, 1993, COMSAT changed its corporate name from
"Communications Satellite Corporation" to "COMSAT Corporation". COMSAT is not an
agency  or establishment  of the  U.S. Government.  The U.S.  Government has not
invested funds in COMSAT, guaranteed funds invested in COMSAT or guaranteed  the
payment of dividends by COMSAT.
    

    Although COMSAT is a non-governmental publicly held corporation whose common
stock  is  traded on  the New  York  Stock Exchange,  the Satellite  Act governs
certain aspects  of COMSAT's  structure,  ownership and  operations,  including:
three  of COMSAT's  15 directors  are appointed by  the President  of the United
States with  the  advice and  consent  of  the United  States  Senate;  COMSAT's
issuances  of capital stock  and borrowings of  money must be  authorized by the
Federal Communications  Commission (the  "FCC"); there  are limitations  on  the
classes  of persons that  may hold shares  of COMSAT's capital  stock and on the
number of shares a person or class of persons may hold; and, on matters that may
affect the national interest and foreign  policy of the United States,  COMSAT's
representatives  to  INTELSAT and  Inmarsat receive  instructions from  the U.S.
Government. Congress has  reserved the  right to  amend the  Satellite Act,  and
amendments, if any, could materially affect COMSAT.

    Under    the   Satellite   Act,   the   International   Maritime   Satellite
Telecommunications Act of 1978 and the  Communications Act of 1934, as  amended,
COMSAT  is subject  to regulation by  the FCC  with respect to  its COMSAT World
Systems and  COMSAT Mobile  Communications services  and the  rates charged  for
those  services. FCC decisions and policies have had and will continue to have a
significant impact on COMSAT.

    The principal  place  of business  of  COMSAT  is 6560  Rock  Spring  Drive,
Bethesda, MD 20817, telephone number (301) 214-3000.

RECENT DEVELOPMENTS

   
    On  July 1, 1995,  CEG acquired the Quebec  Nordiques National Hockey League
("NHL") franchise for approximately  $75 million. COMSAT  plans to transfer  the
team to Denver, Colorado in time for the 1995-96 NHL season. The acquisition was
financed with the proceeds of a bank loan, the principal of which must be repaid
not later than January 1, 1997 (the "Bank Loan"). See "Use of Proceeds".
    

   
    On  June 20, 1995,  COMSAT and CEG  announced the settlement  of all pending
claims  of  patent   and  copyright  infringement   brought  by   SpectraVision,
Incorporated  ("SpectraVision")  in  a  lawsuit  initiated  in  1992.  Under the
disclosed terms of the settlement, COMSAT's majority-owned subsidiary On Command
Video Corporation ("OCV") will provide certain  rights under one of its  patents
to  SpectraVision, and SpectraVision will provide  to CEG and OCV certain rights
to the  use of  SpectraVision's copyrighted  computer communications  protocols.
COMSAT believes that this resolution will not have a material impact on COMSAT's
financial position.
    

                                       5
<PAGE>
                                  RISK FACTORS

    PROSPECTIVE  PURCHASERS OF PREFERRED SECURITIES  SHOULD CAREFULLY REVIEW THE
INFORMATION CONTAINED  ELSEWHERE  IN  THIS PROSPECTUS  AND  SHOULD  PARTICULARLY
CONSIDER THE FOLLOWING MATTERS:

SUBORDINATION OF GUARANTEE AND JUNIOR SUBORDINATED DEBENTURES

    COMSAT's obligations under the Guarantee are subordinate and junior in right
of  payment  to  all  other  liabilities  of  COMSAT  except  for  certain other
guarantees that may be executed by COMSAT in respect of preferred securities  of
certain  affiliates  of  COMSAT.  The obligations  of  COMSAT  under  the Junior
Subordinated Debentures described under "Description of the Junior  Subordinated
Debentures"   are  subordinate  and  junior  in   right  of  payment  to  Senior
Indebtedness of  COMSAT.  At  March  31, 1995,  Senior  Indebtedness  of  COMSAT
aggregated  approximately  $751 million.  There are  no  terms in  the Preferred
Securities, the  Junior  Subordinated Debentures  or  the Guarantee  that  limit
COMSAT's  ability to incur additional  indebtedness, including indebtedness that
ranks senior  to  the Junior  Subordinated  Debentures and  the  Guarantee.  See
"Description  of the Guarantee  -- Status of the  Guarantee" and "Description of
the Junior Subordinated Debentures -- Subordination".

OPTION TO EXTEND INTEREST PAYMENT PERIOD

    COMSAT has the  right under  the Indenture  to extend  the interest  payment
period  from time to time on the  Junior Subordinated Debentures to a period not
exceeding 60 consecutive months, and, as a consequence, monthly dividends on the
Preferred Securities would be deferred by  COMSAT Capital I (but would  continue
to  accrue  with interest  thereon) during  any  such extended  interest payment
period. In the event that COMSAT exercises this right, COMSAT may not declare or
pay dividends on,  or redeem,  purchase or acquire,  any of  its capital  stock.
Prior to the termination of any such extension period, COMSAT may further extend
the  interest payment period, provided that  such extension period together with
all such previous and further extensions  thereof may not exceed 60  consecutive
months.  Upon the termination of any extension  period COMSAT is required to pay
all amounts then due and, upon such  payment, COMSAT may select a new  extension
period,  subject  to the  above requirements.  In no  event shall  any extension
period extend beyond the maturity of the Junior Subordinated Debentures.  COMSAT
Capital  I and  COMSAT believe  that the  extension of  a payment  period on the
Junior Subordinated Debentures  is unlikely. See  "Description of the  Preferred
Securities  -- Dividends" and "Description of the Junior Subordinated Debentures
- -- Option to Extend Interest Payment Period".

    Should an  extended interest  payment period  occur, COMSAT  Capital I  will
continue  to accrue income  for United States federal  income tax purposes which
will be  allocated, but  not  distributed, to  holders  of record  of  Preferred
Securities.  As a  result, such  a holder  will include  such interest  in gross
income for United States federal income  tax purposes in advance of the  receipt
of  cash, and will  not receive the cash  from COMSAT Capital  I related to such
income if such a holder disposes of his or her Preferred Securities prior to the
record date for payment of dividends.  See "United States Taxation --  Potential
Extension of Interest Payment Period".

TAX EVENT OR INVESTMENT COMPANY EVENT REDEMPTION OR DISTRIBUTION

   
    Upon the occurrence of a Tax Event (as defined herein) or Investment Company
Event  (as defined herein), the General Partner  will elect to either (i) redeem
the Preferred Securities in  whole or (ii) dissolve  COMSAT Capital I and  cause
Junior Subordinated Debentures to be distributed to the holders of the Preferred
Securities  in connection with the liquidation of  COMSAT Capital I. In the case
of a  Tax Event,  the General  Partner may  also elect  to cause  the  Preferred
Securities to remain outstanding and pay Additional Interest (as defined herein)
on  the Junior Subordinated Debentures.  The Junior Subordinated Debentures will
initially be issued at face value as  a Global Security (as defined herein)  and
will  be limited in aggregate principal  amount to approximately $206.2 million,
such amount being the sum of the aggregate stated liquidation preference of  the
Preferred  Securities and the  General Partnership Payment  (as defined herein).
See "Description of the Preferred Securities -- Tax Event or Investment  Company
Event  Redemption or Distribution"  and "Description of  the Junior Subordinated
Debentures -- General".
    

                                       6
<PAGE>
    Under current United States  federal income tax law,  a distribution of  the
Junior  Subordinated Debentures would not  be a taxable event  to holders of the
Preferred Securities. Under a change in law, a change in legal interpretation or
the other circumstances giving rise to a Tax Event or Investment Company  Event,
however,  the dissolution could be  a taxable event to  holders of the Preferred
Securities. In the judgment of special tax counsel to COMSAT and COMSAT  Capital
I, the series of events which would result in the recognition of taxable gain or
loss  by holders  of the  Preferred Securities,  by reason  of a  dissolution of
COMSAT Capital I  in response to  a Tax  Event or Investment  Company Event,  is
unlikely  to  occur. There  can be  no  assurance in  this regard,  however. See
"United States  Taxation  --  Receipt of  Junior  Subordinated  Debentures  Upon
Liquidation or Merger of COMSAT Capital I".

REPLACEMENT OF COMSAT CAPITAL I WITH A TRUST

   
    Subject  to certain  conditions, COMSAT  Capital I  has the  right to merge,
consolidate or otherwise  amalgamate into  a trust, thus  replacing the  limited
partnership  interests with beneficial  interests in a trust.  In the event such
replacement is made, investors' rights  in the successor securities will  remain
materially unchanged; however, investors will receive for tax reporting purposes
a  Form 1099 instead of a Form K-1. It is expected that the Preferred Securities
and any such successor securities will be listed as equity securities on the New
York Stock Exchange. Accordingly, the Preferred Securities are expected to trade
"flat"; thus, purchasers will not pay  and sellers will not receive any  accrued
and  unpaid interest  on the Preferred  Securities or  such successor securities
that is not included in the trading price. However, if the replacement is  made,
for  United  States  Federal income  tax  purposes, interest  on  the applicable
successor securities will be included in income as it accrues (regardless of the
method of accounting otherwise used), rather than when it is allocated or  paid.
See  "Description  of  the  Preferred  Securities  --  Merger,  Consolidation or
Amalgamation of  COMSAT  Capital I",  "United  States Taxation  --  Income  from
Preferred  Securities",  "United States  Taxation --  Taxation of  Grantor Trust
Interests" and  "United  States  Taxation --  Potential  Extension  of  Interest
Payment Period".
    

                                       7
<PAGE>
                    SUMMARY FINANCIAL INFORMATION OF COMSAT

    The  selected data presented below under the caption "Income Statement Data"
for each of  the years  in the  three-year period  ended December  31, 1994  and
"Balance Sheet Data" as of December 31, 1994 and 1993 have been derived from the
consolidated financial statements of COMSAT, which have been audited by Deloitte
&  Touche LLP, independent auditors. The selected consolidated "Income Statement
Data" for each of the years ended December 31, 1991 and 1990 and "Balance  Sheet
Data"  as of December 31, 1992, 1991 and 1990 are derived from audited financial
statements of  COMSAT not  included  or incorporated  by reference  herein.  The
selected data presented below as of and for each of the quarters ended March 31,
1995  and 1994 have  been derived from the  consolidated financial statements of
COMSAT, which  have  not  been  audited,  but in  the  opinion  of  COMSAT  such
information   includes  all  adjustments,  consisting  of  normal  or  recurring
adjustments,  necessary  for  a  fair  presentation  of  such  information.  The
consolidated financial statements as of December 31, 1994 and 1993, and for each
of  the  years  in  the  three-year period  ended  December  31,  1994,  and the
independent auditors' report  thereon (which includes  an explanatory  paragraph
referring  to the change in its method  of accounting for income taxes), and the
condensed consolidated financial statements as of  and for each of the  quarters
ended  March  31, 1995  and  1994 and  Management's  Discussion and  Analysis of
Financial Condition and Results  of Operations ("MD&A")  for such periods,  have
been  incorporated by reference herein.  See "Incorporation of Certain Documents
by Reference".  The financial  information  presented below  should be  read  in
conjunction  with such consolidated  financial statements and  the notes thereto
and such MD&A.

<TABLE>
<CAPTION>
                                 QUARTER ENDED MARCH
                                         31,
                                     (UNAUDITED)                         YEAR ENDED DECEMBER 31,
                                ----------------------  ----------------------------------------------------------
                                   1995        1994        1994        1993        1992        1991        1990
                                ----------  ----------  ----------  ----------  ----------  ----------  ----------
                                                   (IN THOUSANDS, EXCEPT PER SHARE INFORMATION)
<S>                             <C>         <C>         <C>         <C>         <C>         <C>         <C>
INCOME STATEMENT DATA:
Revenues......................  $  207,883  $  200,495  $  826,899  $  754,285  $  688,093  $  651,211  $  563,462
Operating expenses............     178,126     163,621     676,648     602,705     583,111     508,499     563,980
Operating income (loss).......      29,757      36,874     150,251     151,580     104,982     142,712        (518)
Income (loss) before
 cumulative effect of changes
 in accounting principles.....      14,573      20,181      77,642      82,469      53,292      81,014      (9,045)
Cumulative effect of changes
 in accounting principles.....      --          --          --           1,925      --         (26,607)     --
Net income (loss).............      14,573      20,181      77,642      84,394      53,292      54,407      (9,045)
Dividends paid................       9,178       7,446      33,547      30,410      27,837      25,867      25,219
Primary earnings (loss) per
 share........................        0.31        0.43        1.64        1.79        1.16        1.22       (0.21)
Dividends paid per share......       0.195       0.185        0.76        0.74        0.70        0.67        0.66

BALANCE SHEET DATA:
Total assets..................   2,017,219   1,975,992   1,975,992   1,773,513   1,654,985   1,469,516   1,300,683
Long-term debt................     569,440     515,542     515,542     410,550     496,804     391,308     383,695
Stockholders' equity..........     837,713     826,916     826,916     763,440     702,292     657,783     619,150
</TABLE>

                                       8
<PAGE>
                  RATIO OF EARNINGS TO FIXED CHARGES OF COMSAT

<TABLE>
<CAPTION>
                                                     QUARTER
                                                      ENDED
                                                    MARCH 31,       YEAR ENDED DECEMBER 31,
                                                    ----------  -------------------------------
                                                    1995  1994  1994  1993  1992  1991  1990(2)
                                                    ----  ----  ----  ----  ----  ----  -------
<S>                                                 <C>   <C>   <C>   <C>   <C>   <C>   <C>
Ratio of Earnings to Fixed Charges: (1)...........  2.4   3.4   3.4   3.7   2.6   3.1       --
<FN>
- --------------
(1)  For purposes of calculating this  ratio, fixed charges consist of  interest
     expense   including  capitalized  interest,  the  interest  expense  of  an
     unconsolidated majority-owned investment  in 1990,  1991 and  1992, and  an
     estimate  of the  interest factor  of rental  expense. Earnings  consist of
     pretax income (loss) from continuing  operations before fixed charges,  the
     losses   and  undistributed   earnings  of   equity  investments   and  the
     amortization of capitalized interest. During the periods presented,  COMSAT
     did  not have any  preferred stock issued  or outstanding. Accordingly, the
     ratio of earnings to combined  fixed charges and preferred stock  dividends
     is not presented.
(2)  1990  earnings were  inadequate to cover  fixed charges, as  such terms are
     defined in Item  503(d) of Regulation  S-K, with a  coverage deficiency  of
     $23,726,000.  However,  1990  earnings include  a  $97,576,000 nonrecurring
     charge related to  the restructuring  of the  video entertainment  business
     unit.
</TABLE>

                                USE OF PROCEEDS

   
    The  proceeds from the sale of the  Preferred Securities will be invested in
the Junior Subordinated  Debentures issued pursuant  to the Indenture  described
herein. The proceeds from the sale of the Junior Subordinated Debentures will be
used  by  COMSAT  to reduce  outstanding  commercial  paper (at  June  30, 1995,
totaling  approximately  $131.5  million,  at   an  average  interest  cost   of
approximately  6%) and to  repay the Bank  Loan, which must  be repaid not later
than January  1,  1997 and  has  a current  interest  rate of  9%.  See  "COMSAT
Corporation -- Recent Developments".
    

                            CAPITALIZATION OF COMSAT

   
    The  following table sets forth  the consolidated short-term obligations and
capitalization of COMSAT as of  March 31, 1995, and  as adjusted to reflect  the
application  of  the  estimated net  proceeds  from  the sale  of  the Preferred
Securities. See "Use of Proceeds".
    

   
<TABLE>
<CAPTION>
                                                                                               MARCH 31, 1995
                                                                                           -----------------------
                                                                                            ACTUAL    AS ADJUSTED
                                                                                           ---------  ------------
                                                                                                (IN MILLIONS)
<S>                                                                                        <C>        <C>
Commercial paper and current maturities of long-term obligations.........................  $     149   $       24
                                                                                           ---------  ------------
                                                                                           ---------  ------------
Long-term debt...........................................................................  $     569   $      569
                                                                                           ---------  ------------
Company-obligated mandatorily redeemable preferred securities issued by subsidiary.......          0          200
                                                                                           ---------  ------------
Stockholders' equity:
  Common stock...........................................................................        315          315
  Preferred stock........................................................................          0            0
  Retained earnings......................................................................        538          538
  Treasury stock (at cost)...............................................................        (12)         (12)
  Other..................................................................................         (3)          (3)
                                                                                           ---------  ------------
    Total stockholders' equity...........................................................        838          838
                                                                                           ---------  ------------
    Total capitalization (excluding short-term obligations)..............................  $   1,407   $    1,607
                                                                                           ---------  ------------
                                                                                           ---------  ------------
</TABLE>
    

                                       9
<PAGE>
                    DESCRIPTION OF THE PREFERRED SECURITIES

   
    SET FORTH  BELOW  IS  A SUMMARY  OF  ALL  MATERIAL TERMS  OF  THE  PREFERRED
SECURITIES.  THE SUMMARY DOES NOT PURPORT TO  BE COMPLETE AND IS SUBJECT TO, AND
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO, THE LIMITED PARTNERSHIP AGREEMENT,  A
COPY OF WHICH IS FILED AS AN EXHIBIT TO THE REGISTRATION STATEMENT OF WHICH THIS
PROSPECTUS  IS A PART.  CAPITALIZED TERMS NOT OTHERWISE  DEFINED HEREIN HAVE THE
MEANINGS ASSIGNED TO THEM IN THE LIMITED PARTNERSHIP AGREEMENT.
    

GENERAL

    All of  the  partnership interests  in  COMSAT  Capital I,  other  than  the
Preferred Securities offered hereby, are owned directly or indirectly by COMSAT.
The   Limited  Partnership  Agreement  authorizes   and  creates  the  Preferred
Securities, which represent limited partner  interests in COMSAT Capital I.  The
limited  partner interests represented  by the Preferred  Securities will have a
preference with respect to dividends and amounts payable on liquidation over the
General  Partner's  interest  in  COMSAT  Capital  I.  The  Limited  Partnership
Agreement  does  not  permit  the  issuance  of  any  other  limited partnership
interests or preferred securities of COMSAT Capital I, or the incurrence of  any
indebtedness by COMSAT Capital I.

DIVIDENDS

    The dividends payable on each Preferred Security will be fixed at a rate per
annum  of       % of  the  stated liquidation  preference  of $25  per Preferred
Security. Dividends in arrears will bear interest thereon at the rate per  annum
of     % thereof. The term "dividends" as used herein includes any such interest
payable unless otherwise stated. The amount of dividends payable for any  period
will be computed on the basis of a 360-day year of twelve 30-day months.

    Dividends  on the Preferred Securities will  be cumulative, will accrue from
the date of initial issuance and will be payable monthly in arrears, on the last
day of each calendar month of each year, commenc-
ing                ,  1995, when, as and  if available and  determined to be  so
payable  by COMSAT, as the General Partner, except as otherwise described below.
COMSAT has the right under the  Indenture to extend the interest payment  period
from  time  to  time on  the  Junior  Subordinated Debentures  to  a  period not
exceeding 60 consecutive months, and, as a consequence, monthly dividends on the
Preferred Securities would be deferred by  COMSAT Capital I (but would  continue
to  accrue with interest)  during any such extended  interest payment period. In
the event  that COMSAT  exercises this  right,  COMSAT may  not declare  or  pay
dividends on, or redeem, purchase or acquire, any of its capital stock. Prior to
the  termination of  any such  extension period,  COMSAT may  further extend the
interest payment period, provided that  such extension period together with  all
such  previous  and further  extensions thereof  may  not exceed  60 consecutive
months. Upon the termination of any  extension period COMSAT is required to  pay
all  amounts then due and, upon such  payment, COMSAT may select a new extension
period, subject  to the  above requirements.  In no  event shall  any  extension
period  extend beyond  the maturity of  the Junior  Subordinated Debentures. See
"Description of the Junior Subordinated  Debentures -- Interest" and "--  Option
to Extend Interest Payment Period".

    Dividends  on the Preferred Securities must  be declared monthly and paid on
the dates payable  to the extent  that COMSAT  Capital I has  (i) funds  legally
available  for the payment of such dividends and (ii) cash on hand sufficient to
permit such  payments.  It  is  anticipated that  COMSAT  Capital  I's  earnings
available  for distribution to  the holders of the  Preferred Securities will be
limited to payments  under the  Junior Subordinated Debentures  in which  COMSAT
Capital  I will invest the proceeds from  the issuance and sale of the Preferred
Securities. See "Description of the Junior Subordinated Debentures". The payment
of dividends, to the extent declared by  COMSAT Capital I out of moneys held  by
COMSAT  Capital I and legally available therefor, is guaranteed by COMSAT as set
forth under "Description of the Guarantee".

    Dividends on the Preferred Securities will be payable to the holders thereof
as they appear  on the books  and records of  COMSAT Capital I  on the  relevant
record  dates, which will  be one Business  Day (as defined  below) prior to the
relevant payment  dates. Subject  to  any applicable  laws and  regulations  and

                                       10
<PAGE>
   
the  provisions of the Limited Partnership  Agreement, each such payment will be
made as  described  under  "Book-Entry-Only Issuance  --  The  Depository  Trust
Company"  below. In  the event  the Preferred  Securities shall  not continue to
remain in book-entry-only  form, the  General Partner  shall have  the right  to
select  relevant record dates which shall be more than one Business Day prior to
the relevant payment dates. In  the event that any  date on which dividends  are
payable  on the Preferred Securities is not  a Business Day, then payment of the
dividend payable on such date will be made on the next succeeding day which is a
Business Day (and without any interest or  other payment in respect of any  such
delay)  except that,  if such  Business Day is  in the  next succeeding calendar
year, such payment shall be made  on the immediately preceding Business Day,  in
each  case with the same force  and effect as if made  on such date. A "Business
Day" shall mean any day  other than a day on  which banking institutions in  The
City of New York are authorized or required by law or executive order to close.
    

   
    COMSAT  Capital I shall be required  to declare and pay additional dividends
on the  Preferred Securities  upon any  dividend arrearages  in respect  of  the
Preferred Securities in order to provide, in effect, monthly compounding on such
dividend arrearages.
    

OPTIONAL REDEMPTION

    The  Preferred Securities are redeemable at  the option of COMSAT Capital I,
in whole or in part, from time to time, on or after             , 2000, upon not
less than 30  nor more than  60 days' notice,  at the Redemption  Price. In  the
event  that fewer  than all  the outstanding Preferred  Securities are  to be so
redeemed, the Preferred Securities to be redeemed will be selected as  described
under  "Book-Entry-Only Issuance  -- The Depository  Trust Company"  below. If a
partial redemption would result  in the delisting  of the Preferred  Securities,
COMSAT Capital I may only redeem the Preferred Securities in whole.

TAX EVENT OR INVESTMENT COMPANY EVENT REDEMPTION OR DISTRIBUTION

    If  a Tax  Event shall  occur and be  continuing, the  General Partner shall
elect to (i) redeem the  Preferred Securities in whole  (and not in part),  upon
not less than 30 nor more than 60 days' notice at the Redemption Price within 90
days  following the occurrence of such Tax Event; provided, that, if at the time
there is available to the General  Partner the opportunity to eliminate,  within
such  90-day period, the  Tax Event by  taking some ministerial  action, such as
filing a form or making an  election, or pursuing some other similar  reasonable
measure,  which has no adverse effect on COMSAT Capital I or COMSAT, the General
Partner will pursue  such measure in  lieu of redemption,  (ii) dissolve  COMSAT
Capital  I and  cause Junior  Subordinated Debentures  to be  distributed to the
holders of the Preferred Securities in liquidation of COMSAT Capital I, or (iii)
cause the Preferred Securities to remain outstanding and pay Additional Interest
on  the  Junior  Subordinated  Debentures.   See  "Description  of  the   Junior
Subordinated Debentures -- Additional Interest".

    "Tax Event" means that the General Partner shall have obtained an opinion of
nationally recognized independent tax counsel experienced in such matters to the
effect  that, as  a result  of (a)  any amendment  to, or  change (including any
announced prospective change) in,  the laws (or  any regulations thereunder)  of
the  United States or  any political subdivision or  taxing authority thereof or
therein, (b) any amendment to or  change in an interpretation or application  of
such  laws or regulations by any legislative body, court, governmental agency or
regulatory authority  (including  the  enactment  of  any  legislation  and  the
publication of any judicial decision or regulatory determination on or after the
date  of  this  Prospectus)  or (c)  any  interpretation  or  pronouncement that
provides for a position  with respect to such  laws or regulations that  differs
from  the  generally accepted  position on  the date  of this  Prospectus, which
amendment or change  is effective  or which interpretation  or pronouncement  is
announced  on  or after  the  date of  this Prospectus,  there  is more  than an
insubstantial risk that (i)  COMSAT Capital I is  subject to federal income  tax
with  respect to interest  received on the  Junior Subordinated Debentures, (ii)
interest payable to COMSAT Capital I on the Junior Subordinated Debentures  will
not  be deductible for federal income tax  purposes or (iii) COMSAT Capital I is
subject to  more than  a  DE MINIMIS  amount of  other  taxes, duties  or  other
governmental charges.

                                       11
<PAGE>
    If  an Investment Company  Event shall occur and  be continuing, the General
Partner shall elect to either (i) redeem the Preferred Securities in whole  (and
not  in  part), upon  not less  than 30  nor more  than 60  days' notice  at the
Redemption Price  within 90  days following  the occurrence  of such  Investment
Company  Event; provided, that, if at the time there is available to the General
Partner the opportunity to eliminate, within such 90-day period, the  Investment
Company  Act Event by taking  some ministerial action, such  as filing a form or
making an election, or pursuing some other similar reasonable measure, which has
no adverse effect on COMSAT Capital I or COMSAT, the General Partner will pursue
such measure in lieu of redemption, or (ii) dissolve COMSAT Capital I and  cause
the  Junior  Subordinated Debentures  to be  distributed to  the holders  of the
Preferred Securities  in  liquidation  of  COMSAT  Capital  I,  within  90  days
following the occurrence of such Investment Company Event.

   
    "Investment  Company  Event" means  the  occurrence of  a  change in  law or
regulation or  a written  change  in interpretation  or  application of  law  or
regulation  by any  legislative body,  court, governmental  agency or regulatory
authority (a "Change in 1940 Act Law") to the effect that COMSAT Capital I is or
will be considered an  "investment company" which is  required to be  registered
under  the Investment Company  Act of 1940,  as amended (the  "1940 Act"), which
Change in  1940  Act  Law  becomes  effective on  or  after  the  date  of  this
Prospectus;  provided, that no Investment Company  Event shall be deemed to have
occurred if  the  General  Partner  obtains  a  written  opinion  of  nationally
recognized independent counsel experienced in practice under the 1940 Act to the
effect  that, notwithstanding such Change  in 1940 Act Law,  COMSAT Capital I is
not required to be registered as  an "investment company" within the meaning  of
the 1940 Act.
    

    After  the date fixed for any distribution of Junior Subordinated Debentures
upon dissolution  of COMSAT  Capital I,  (i) the  Preferred Securities  will  no
longer  be  deemed to  be outstanding,  (ii) The  Depository Trust  Company (the
"Depository" or "DTC")  or its nominee,  as the record  holder of the  Preferred
Securities,  will  receive  a  registered  global  certificate  or  certificates
representing the  Junior  Subordinated  Debentures to  be  delivered  upon  such
distribution  and (iii)  any certificates representing  Preferred Securities not
held by  DTC or  its nominee  will be  deemed to  represent Junior  Subordinated
Debentures  having  a principal  amount  equal to  the  aggregate of  the stated
liquidation preference of  such Preferred  Securities, with  accrued and  unpaid
interest  equal to the amount of accrued  and unpaid dividends on such Preferred
Securities, until such  certificates are presented  to COMSAT or  its agent  for
transfer or reissuance.

MANDATORY REDEMPTION

    Upon the repayment of the Junior Subordinated Debentures at maturity or upon
any  acceleration,  earlier  redemption  or otherwise,  the  proceeds  from such
repayment will be applied to redeem the Preferred Securities, in whole, upon not
less than 30 nor more than 60 days' notice, at the Redemption Price.

REDEMPTION PROCEDURES

    COMSAT Capital I  may not redeem  fewer than all  the outstanding  Preferred
Securities  unless  all  accrued and  unpaid  dividends  have been  paid  on all
Preferred Securities for all monthly dividend periods terminating on or prior to
the date of redemption.

   
    If COMSAT Capital  I gives a  notice of redemption  in respect of  Preferred
Securities  (which  notice  will  be  irrevocable)  and  all  of  the  Preferred
Securities are in book-entry form,  then, by 12:00 noon,  New York time, on  the
redemption  date,  COMSAT  Capital I  will  irrevocably deposit  with  DTC funds
sufficient to pay the applicable Redemption Price and will give DTC  irrevocable
instructions  and authority to  pay the Redemption  Price to the  holders of the
Preferred Securities.  See "Book-Entry-Only  Issuance  -- The  Depository  Trust
Company".  If all of the Preferred Securities are not in book-entry form, COMSAT
Capital I may pay the  Redemption Price to a  holder of Preferred Securities  by
check  upon  presentation  by  a holder  of  the  certificate  representing such
Preferred Securities. If notice  of redemption shall have  been given and  funds
are  deposited as required,  then upon the  date of such  deposit, all rights of
holders of such Preferred Securities so called for redemption will cease, except
the right of the holders of such Preferred Securities to receive the  Redemption
Price, but without interest on such Redemption Price. In
    

                                       12
<PAGE>
the  event that any date  fixed for redemption of  Preferred Securities is not a
Business Day, then payment of the Redemption Price payable on such date will  be
made  on  the next  succeeding  day which  is a  Business  Day (and  without any
interest or other payment in  respect of any such  delay), except that, if  such
Business  Day falls in the next calendar year,  such payment will be made on the
immediately preceding Business Day. In the event that payment of the  Redemption
Price  in respect of Preferred Securities  is improperly withheld or refused and
not paid either  by COMSAT  Capital I  or by  COMSAT pursuant  to the  Guarantee
described  under  "Description of  the Guarantee",  dividends on  such Preferred
Securities will  continue  to accrue  at  the  then applicable  rate,  from  the
original  redemption  date to  the date  of  payment, in  which case  the actual
payment date will be  considered the date fixed  for redemption for purposes  of
calculating the Redemption Price.

    Subject  to the foregoing and applicable law (including, without limitation,
United States federal securities  laws), COMSAT or its  subsidiaries may at  any
time  and from time to time purchase outstanding Preferred Securities by tender,
in the open market or by private agreement.

LIQUIDATION DISTRIBUTION UPON DISSOLUTION

   
    In the  event of  any voluntary  or involuntary  dissolution, winding-up  or
termination   (other  than  any  termination   within  the  meaning  of  section
708(b)(1)(B) of  the  Code  (as  defined  herein)  or  equivalent  provision  of
subsequent  law, which termination  does not constitute  a termination of COMSAT
Capital I  for any  other  purpose) of  COMSAT Capital  I,  the holders  of  the
Preferred  Securities at the time will be  entitled to receive out of the assets
of COMSAT Capital I available for distribution to partners after satisfaction of
liabilities of  creditors, before  any distribution  of assets  is made  to  the
General  Partner,  an amount  equal  to, in  the  case of  holders  of Preferred
Securities, the  aggregate  of the  stated  liquidation preference  of  $25  per
Preferred  Security  and accrued  and unpaid  dividends thereon  to the  date of
payment (the  "Liquidation  Distribution"),  unless,  in  connection  with  such
dissolution,  winding-up  or termination,  Junior  Subordinated Debentures  in a
principal amount equal to the aggregate liquidation preference of the  Preferred
Securities  have been  distributed on  a pro  rata basis  to the  holders of the
Preferred Securities.
    

   
    Pursuant to the  Limited Partnership  Agreement, COMSAT Capital  I shall  be
dissolved  and its  affairs shall  be wound  up: (i)  on December  31, 2094, the
expiration of the  term of COMSAT  Capital I,  (ii) upon the  bankruptcy of  the
General  Partner, (iii) upon the assignment by the General Partner of its entire
interest in COMSAT Capital I when the assignee is not admitted to COMSAT Capital
I as  a general  partner of  COMSAT Capital  I in  accordance with  the  Limited
Partnership  Agreement, or  the filing  of a  certificate of  dissolution or its
equivalent with respect to the General Partner, or the revocation of the General
Partner's charter and the expiration of 90 days after the date of notice to  the
General  Partner of  revocation without a  reinstatement of its  charter, or any
other event occurs which  causes the General  Partner to cease  to be a  general
partner  of COMSAT Capital I  under the Partnership Act,  unless the business of
COMSAT Capital  I  is continued  by  a majority  in  interest of  the  remaining
partners  of COMSAT Capital  I in accordance  with the Partnership  Act, (iv) in
accordance with the provisions of the  Preferred Securities, (v) upon the  entry
of  a decree of a  judicial dissolution or (vi) upon  the written consent of all
partners of COMSAT Capital I.
    

MERGER, CONSOLIDATION OR AMALGAMATION OF COMSAT CAPITAL I

   
    COMSAT Capital I may not,  and COMSAT will not  permit COMSAT Capital I  to,
consolidate,  amalgamate,  merge with  or into,  or be  replaced by,  or convey,
transfer or lease its properties and assets substantially as an entirety to  any
corporation  or other  body, except  as described  below. COMSAT  Capital I may,
without the consent  of the  holders of the  Preferred Securities,  consolidate,
amalgamate,  merge with  or into,  or be replaced  by, a  limited partnership, a
limited liability company or  a trust organized  as such under  the laws of  any
state  of the United States of America or of the District of Columbia; provided,
that (i)  such  successor  entity  either  (x)  expressly  assumes  all  of  the
obligations   of  COMSAT  Capital  I  under  the  Preferred  Securities  or  (y)
substitutes for the Preferred  Securities other securities having  substantially
the  same terms as the Preferred Securities (the "Successor Securities") so long
as the Successor Securities rank, with respect to participation in the  profits,
dividends and
    

                                       13
<PAGE>
   
assets  of the successor  entity, at least  as high as  the Preferred Securities
rank with  respect to  participation in  the profits,  dividends and  assets  of
COMSAT  Capital I, (ii)  COMSAT expressly acknowledges  such successor entity as
the holder of the Junior Subordinated Debentures, (iii) the Preferred Securities
or any Successor  Securities are  listed, or  any Successor  Securities will  be
listed  upon notification  of issuance, on  any national  securities exchange or
other organization on which the Preferred Securities are then listed, (iv)  such
merger,  consolidation, amalgamation or replacement does not cause the Preferred
Securities  (including  any  Successor  Securities)  to  be  downgraded  by  any
nationally   recognized  statistical  rating   organization,  (v)  such  merger,
consolidation, amalgamation or replacement does not adversely affect the powers,
preferences and other special rights of the holders of the Preferred  Securities
(including  any  Successor  Securities)  in  any  material  respect,  (vi)  such
successor entity has a purpose substantially identical to that of COMSAT Capital
I, (vii)  COMSAT  has provided  a  guarantee to  the  holders of  the  Successor
Securities  with respect to such successor  entity having substantially the same
terms as  the  Guarantee,  and  (viii)  prior  to  such  merger,  consolidation,
amalgamation  or  replacement,  COMSAT  has received  an  opinion  of nationally
recognized independent counsel to COMSAT  Capital I experienced in such  matters
to  the  effect  that  (x) such  successor  entity  will not  be  treated  as an
association taxable  as  a corporation  for  federal income  tax  purposes,  (y)
following  such  merger,  consolidation,  amalgamation  or  replacement, neither
COMSAT nor such successor entity will  be required to register as an  investment
company  under the 1940 Act and  (z) such merger, consolidation, amalgamation or
replacement will not adversely  affect the limited liability  of the holders  of
the  Preferred Securities. See "Risk Factors  -- Replacement of COMSAT Capital I
with a Trust".
    

   
    Subject to certain  conditions, COMSAT  Capital I  has the  right to  merge,
consolidate  or otherwise  amalgamate into a  trust, thus  replacing the limited
partnership interests in COMSAT Capital I with beneficial interests in a  trust.
In  the  event such  replacement  is made,  investors'  rights in  the Successor
Securities will remain materially unchanged; however, investors will receive for
tax reporting purposes a Form  1099 instead of a Form  K-1. For a discussion  of
tax consequences to holders of Successor Securities, see "United States Taxation
- --  Income from  Preferred Securities", "United  States Taxation  -- Taxation of
Grantor Trust Interests" and "United  States Taxation -- Potential Extension  of
Interest  Payment Period".  In determining whether  to replace  COMSAT Capital I
with a  trust, COMSAT  Capital I  will  balance the  potential cost  savings  of
distributing   Forms  1099  instead  of  Forms  K-1  to  investors  against  the
administrative costs, including trustees' fees and transaction costs, associated
with such replacement.
    

VOTING RIGHTS

    Except as  provided  below  and  under  "Description  of  the  Guarantee  --
Amendments  and Assignment"  and as  otherwise required  by law  and the Limited
Partnership Agreement,  the holders  of the  Preferred Securities  will have  no
voting rights.

   
    If  (i) COMSAT  Capital I fails  to pay  dividends in full  on the Preferred
Securities for 18 consecutive  months; (ii) an Event  of Default (as defined  in
the  Indenture) occurs and is continuing  on the Junior Subordinated Debentures;
or (iii) COMSAT is in default on  any of its payment or other obligations  under
the  Guarantee  (as described  under "Description  of  the Guarantee  -- Certain
Covenants of COMSAT"),  then the  holders of  the Preferred  Securities will  be
entitled by the majority vote of such holders to appoint and authorize a special
representative  of  COMSAT  Capital  I  and  the  limited  partners  (a "Special
Representative") to  enforce  COMSAT  Capital  I's  creditor  rights  under  the
Indenture  and the Junior Subordinated Debentures,  to enforce the rights of the
holders of  the Preferred  Securities under  the Guarantee  and to  enforce  the
rights  of the holders of  the Preferred Securities to  receive dividends on the
Preferred Securities.  The Special  Representative shall  not be  admitted as  a
general  partner in  COMSAT Capital  I or  otherwise be  deemed to  be a general
partner in  COMSAT  Capital  I  and  shall have  no  liability  for  the  debts,
obligations  or liabilities of COMSAT Capital I. Notwithstanding the appointment
of any  such Special  Representative  upon COMSAT  Capital  I's failure  to  pay
dividends  in full for  18 consecutive months, COMSAT  shall continue as General
Partner and shall retain all rights under the Indenture, including the right  to
extend  the interest payment period from time  to time to a period not exceeding
60 consecutive months as provided under "Description of the Junior  Subordinated
Debentures -- Option
    

                                       14
<PAGE>
   
to  Extend Interest Payment Period". For  purposes of determining whether COMSAT
Capital I  has  failed to  pay  dividends in  full  for 18  consecutive  months,
dividends  shall be deemed to remain in arrears, notwithstanding any payments in
respect thereof, until full cumulative dividends have been or  contemporaneously
are paid with respect to all monthly dividend periods terminating on or prior to
the  date of payment of  such full cumulative dividends.  Not later than 30 days
after such right to appoint a Special Representative arises, the General Partner
will convene a meeting for the  purpose of appointing a Special  Representative.
If  the General Partner fails to convene such meeting within such 30-day period,
the holders  of  10% in  liquidation  preference of  the  outstanding  Preferred
Securities  will  be entitled  to convene  such meeting.  The provisions  of the
Limited Partnership  Agreement relating  to  the convening  and conduct  of  the
meetings  of  the partners  will apply  with  respect to  any such  meeting. Any
Special Representative so appointed shall  cease to be a Special  Representative
of  COMSAT Capital  I and the  limited partners  if COMSAT Capital  I (or COMSAT
pursuant to  the Guarantee)  shall have  paid  in full  all accrued  and  unpaid
dividends on the Preferred Securities or such default or breach, as the case may
be,  shall have been cured, and COMSAT,  in its capacity as the General Partner,
shall continue the business of COMSAT Capital I without dissolution.
    

   
    If any proposed amendment to the Limited Partnership Agreement provides for,
or the General Partner otherwise proposes to effect, (i) any action which  would
adversely  affect the  powers, preferences  or special  rights of  the Preferred
Securities, whether by way of amendment to the Limited Partnership Agreement  or
otherwise  (including, without limitation, the  authorization or issuance of any
limited  partner  interests  in  COMSAT  Capital  I  other  than  the  Preferred
Securities),  or  (ii)  the  dissolution, winding-up  or  termination  of COMSAT
Capital I,  other  than  (x)  in connection  with  the  distribution  of  Junior
Subordinated Debentures upon the occurrence of a Tax Event or Investment Company
Event or (y) as described under "Merger, Consolidation or Amalgamation of COMSAT
Capital  I" above, then the holders  of outstanding Preferred Securities will be
entitled to vote on such amendment or  proposal of the General Partner (but  not
on any other amendment or proposal), and such amendment or proposal shall not be
effective  except with  the approval  of the holders  of 66  2/3% in liquidation
preference of such outstanding  Preferred Securities having a  right to vote  on
the  matter; provided, however, that  no such approval shall  be required if the
dissolution, winding-up  or  termination of  COMSAT  Capital I  is  proposed  or
initiated  pursuant to the Limited Partnership  Agreement upon the initiation of
proceedings or  after  proceedings  have been  initiated  for  the  dissolution,
winding-up, liquidation or termination of COMSAT.
    

   
    So  long as any Junior Subordinated Debentures are held by COMSAT Capital I,
the General  Partner  shall  not  (i)  direct the  time,  method  and  place  of
conducting  any proceeding for  any remedy available to  the Trustee (as defined
herein), or executing any trust or  power conferred on the Trustee with  respect
to  the Junior  Subordinated Debentures,  (ii) waive  any past  default which is
waivable under Section 513 of the Indenture, (iii) exercise any right to rescind
or annul a declaration that the principal of the Junior Subordinated  Debentures
shall  be due  and payable  or (iv)  consent to  any amendment,  modification or
termination of the Indenture, where such consent shall be required, without,  in
each  case, obtaining the prior  approval of the holders of  at least 66 2/3% in
liquidation preference  of the  Preferred  Securities; provided,  however,  that
where  a consent under  the Indenture would  require the consent  of each holder
affected thereby, no such consent shall be given by the General Partner  without
the  prior consent of  each holder of Preferred  Securities. The General Partner
shall not revoke any action previously authorized  or approved by a vote of  the
Preferred  Securities without the approval of the holders of at least 66 2/3% in
liquidation preference of  the Preferred Securities.  The General Partner  shall
notify all holders of the Preferred Securities of any notice of default received
from the Trustee with respect to the Junior Subordinated Debentures.
    

    Any  required approval of holders of Preferred  Securities may be given at a
separate meeting of holders of  Preferred Securities convened for such  purpose,
at  a meeting of all of the partners  in COMSAT Capital I or pursuant to written
consent. COMSAT Capital I will cause a notice of any meeting at which holders of
Preferred Securities are entitled to vote, or of any matter upon which action by
written consent of such holders is to be  taken, to be mailed to each holder  of
record  of  Preferred  Securities. Each  such  notice will  include  a statement
setting forth (i)  the date of  such meeting or  the date by  which such  action

                                       15
<PAGE>
is  to be taken, (ii)  a description of any  resolution proposed for adoption at
such meeting on which such holders are  entitled to vote or of such matter  upon
which  written  consent is  sought and  (iii) instructions  for the  delivery of
proxies or consents.

    No vote or consent of the  holders of Preferred Securities will be  required
for  COMSAT Capital  I to redeem  and cancel Preferred  Securities in accordance
with the Limited Partnership Agreement.

    Notwithstanding that holders of Preferred Securities are entitled to vote or
consent under any  of the circumstances  described above, any  of the  Preferred
Securities  that are  owned by COMSAT  or by any  entity owned more  than 50% by
COMSAT, or by any  entity controlled by COMSAT,  either directly or  indirectly,
shall not be entitled to vote or consent and shall, for purposes of such vote or
consent, be treated as if they were not outstanding.

    Holders of the Preferred Securities will have no rights to remove or replace
the General Partner.

BOOK-ENTRY-ONLY ISSUANCE -- THE DEPOSITORY TRUST COMPANY

    DTC  will act  as securities  depository for  the Preferred  Securities. The
Preferred  Securities  will  be  issued  only  as  fully-registered   securities
registered   in  the  name  of   Cede  &  Co.  (DTC's   nominee).  One  or  more
fully-registered  global  Preferred  Security   certificates  will  be   issued,
representing in the aggregate the total number of Preferred Securities, and will
be deposited with, DTC.

    DTC  is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law,  a
member  of  the  Federal Reserve  System,  a "clearing  corporation"  within the
meaning of  the  New York  Uniform  Commercial  Code, and  a  "clearing  agency"
registered  pursuant to the provisions  of Section 17A of  the Exchange Act. DTC
holds securities that  its participants ("Participants")  deposit with DTC.  DTC
also  facilitates the settlement among  Participants of securities transactions,
such as  transfers  and  pledges, in  deposited  securities  through  electronic
computerized  book-entry changes in  Participants' accounts, thereby eliminating
the need for physical movement  of securities certificates. Direct  Participants
include  securities  brokers  and  dealers,  banks,  trust  companies,  clearing
corporations and  certain other  organizations ("Direct  Participants"). DTC  is
owned by a number of its Direct Participants and by the New York Stock Exchange,
Inc. (the "New York Stock Exchange"), the American Stock Exchange, Inc., and the
National  Association of  Securities Dealers, Inc.  Access to the  DTC system is
also available to others such as securities brokers and dealers, banks and trust
companies that clear through or maintain a custodial relationship with a  Direct
Participant,  either directly or indirectly ("Indirect Participants"). The rules
applicable to DTC and its Participants are on file with the Commission.

    Purchases of Preferred Securities within the  DTC system must be made by  or
through  Direct  Participants, which  will receive  a  credit for  the Preferred
Securities on DTC's records. The ownership interest of each actual purchaser  of
each  Preferred Security ("Beneficial Owner")  is in turn to  be recorded on the
Direct and Indirect  Participants' records. Beneficial  Owners will not  receive
written  confirmation from  DTC of  their purchases,  but Beneficial  Owners are
expected to receive written confirmations providing details of the transactions,
as well as periodic  statements of their holdings,  from the Direct or  Indirect
Participants through which the Beneficial Owners purchased Preferred Securities.
Transfers  of  ownership  interests  in  the  Preferred  Securities  are  to  be
accomplished by entries made  on the books of  Participants acting on behalf  of
Beneficial  Owners. Beneficial Owners will not receive certificates representing
their ownership interests in Preferred Securities, except in the event that  use
of the book-entry system for the Preferred Securities is discontinued.

    DTC  has  no knowledge  of  the actual  Beneficial  Owners of  the Preferred
Securities; DTC's records reflect only  the identity of the Direct  Participants
to  whose accounts such Preferred Securities are  credited, which may or may not
be the Beneficial Owners. The  Participants will remain responsible for  keeping
account of their holdings on behalf of their customers.

                                       16
<PAGE>
    Conveyance   of  notices   and  other   communications  by   DTC  to  Direct
Participants, by Direct  Participants to  Indirect Participants,  and by  Direct
Participants  and Indirect Participants to Beneficial Owners will be governed by
arrangements among them, subject to any statutory or regulatory requirements  as
may be in effect from time to time.

    Redemption  notices shall  be sent  to Cede &  Co. If  less than  all of the
Preferred Securities are being redeemed, DTC's  practice is to determine by  lot
the  amount of  the interest  of each  Direct Participant  in such  series to be
redeemed.

    Although voting  with respect  to the  Preferred Securities  is limited,  in
those  cases where a  vote is required, neither  DTC nor Cede  & Co. will itself
consent  or  vote  with  respect  to  Preferred  Securities.  Under  its   usual
procedures,  DTC would  mail an  Omnibus Proxy  to COMSAT  Capital I  as soon as
possible after  the  record  date.  The  Omnibus  Proxy  assigns  Cede  &  Co.'s
consenting  or voting rights to those  Direct Participants to whose accounts the
Preferred Securities are credited  on the record date  (identified in a  listing
attached to the Omnibus Proxy).

    Dividend  payments on  the Preferred Securities  will be made  to DTC. DTC's
practice is to credit Direct Participants' accounts on the relevant payment date
in accordance with their respective holdings  shown on DTC's records unless  DTC
has  reason to believe that  it will not receive  payments on such payment date.
Payments by  Participants to  Beneficial  Owners will  be governed  by  standing
instructions  and customary  practices and  will be  the responsibility  of such
Participant and not of DTC, COMSAT Capital I or COMSAT, subject to any statutory
or regulatory requirements as  may be in  effect from time  to time. Payment  of
dividends to DTC is the responsibility of COMSAT Capital I, disbursement of such
payments  to Direct Participants is the  responsibility of DTC, and disbursement
of such payments to  the Beneficial Owners is  the responsibility of Direct  and
Indirect Participants.

    DTC  may discontinue  providing its  services as  securities depository with
respect to the Preferred Securities at  any time by giving reasonable notice  to
COMSAT  Capital  I. Under  such  circumstances, in  the  event that  a successor
securities depository  is  not  obtained, Preferred  Security  certificates  are
required  to be printed and delivered.  Additionally, COMSAT Capital I (with the
consent of COMSAT)  may decide to  discontinue use of  the system of  book-entry
transfers  through DTC (or a successor  depository). In that event, certificates
for the Preferred Securities will be printed and delivered. In each of the above
circumstances, the General Partner will appoint  a paying agent with respect  to
the Preferred Securities.

    The  information in this section concerning  DTC and DTC's book-entry system
has been obtained from sources  that COMSAT and COMSAT  Capital I believe to  be
reliable,  but neither COMSAT nor COMSAT  Capital I takes responsibility for the
accuracy thereof.

REGISTRAR AND TRANSFER AGENT

   
    The First National Bank of Chicago will act as registrar and transfer  agent
for the Preferred Securities.
    

    Registration  of transfers of Preferred  Securities will be effected without
charge by or on behalf of COMSAT Capital I, but upon payment (with the giving of
such indemnity as COMSAT Capital I or COMSAT may require) in respect of any  tax
or other government charges which may be imposed in relation to it.

    COMSAT  Capital I will not be required to register or cause to be registered
the transfer of Preferred Securities  after such Preferred Securities have  been
called for redemption.

MISCELLANEOUS

   
    Application  has been made to list the  Preferred Securities on the New York
Stock Exchange.
    

    The General Partner is authorized and directed to conduct its affairs and to
operate COMSAT Capital I in such a way that COMSAT Capital I will not be  deemed
to  be an "investment company"  required to be registered  under the 1940 Act or
taxed as a corporation for federal income tax purposes,

                                       17
<PAGE>
and so that the Junior Subordinated  Debentures will be treated as  indebtedness
of  COMSAT  for federal  income tax  purposes. In  this connection,  the General
Partner is authorized to take any action, not inconsistent with applicable  law,
the  certificate of  limited partnership  or the  Limited Partnership Agreement,
that the  General  Partner determines  in  its  discretion to  be  necessary  or
desirable  for such purposes, as  long as such action  does not adversely affect
the interests of the holders of the Preferred Securities.

    Holders of the Preferred Securities have no preemptive rights.

GOVERNING LAW

    COMSAT Capital I is  a limited partnership organized  in Delaware under  the
Delaware  Revised  Uniform  Limited  Partnership  Act.  The  Limited Partnership
Agreement and the Preferred Securities will be governed by Delaware law.

                                       18
<PAGE>
                          DESCRIPTION OF THE GUARANTEE

   
    SET FORTH BELOW IS A  SUMMARY OF ALL MATERIAL  TERMS OF THE GUARANTEE  WHICH
WILL  BE EXECUTED AND  DELIVERED BY COMSAT  FOR THE BENEFIT  OF THE HOLDERS FROM
TIME TO  TIME  OF PREFERRED  SECURITIES.  THE SUMMARY  DOES  NOT PURPORT  TO  BE
COMPLETE  AND IS SUBJECT IN ALL RESPECTS  TO THE PROVISIONS OF, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO, THE GUARANTEE, WHICH IS FILED AS AN EXHIBIT  TO
THE REGISTRATION STATEMENT OF WHICH THIS PROSPECTUS FORMS A PART.
    

GENERAL

   
    Pursuant  to  the  Guarantee, COMSAT  will  irrevocably  and unconditionally
agree, to the extent  set forth herein, to  pay in full, to  the holders of  the
Preferred  Securities, the  Guarantee Payments (as  defined below),  as and when
due, regardless of any  defense, right of set-off  or counterclaim which  COMSAT
Capital  I  may have  or  assert. The  following  payments with  respect  to the
Preferred Securities, to the extent not paid by COMSAT Capital I (the "Guarantee
Payments"), will  be subject  to the  Guarantee (without  duplication): (i)  any
accrued  and unpaid  dividends which  are required to  be paid  on the Preferred
Securities, to the extent such dividends have been declared by COMSAT Capital  I
out  of moneys held by COMSAT Capital I and legally available therefor, (ii) the
Redemption Price, payable out of  funds legally available therefor with  respect
to  any Preferred Securities called for redemption by COMSAT Capital I and (iii)
upon a liquidation of COMSAT Capital I,  the lesser of (a) the aggregate of  the
liquidation  preference and  all accrued and  unpaid dividends  on the Preferred
Securities to the date of payment and (b) the amount of assets of COMSAT Capital
I remaining available  for distribution  to holders of  Preferred Securities  in
liquidation  of COMSAT  Capital I, except  in the event  that a Tax  Event or an
Investment Company Event has occurred and COMSAT has elected to dissolve  COMSAT
Capital  I and cause the Junior Subordinated Debentures to be distributed to the
holders of  the Preferred  Securities  in liquidation  of  COMSAT Capital  I  as
provided  in the  Limited Partnership Agreement.  COMSAT's obligation  to make a
Guarantee Payment may be satisfied by direct payment of the required amounts  by
COMSAT  to the holders of Preferred Securities or by causing COMSAT Capital I to
pay such amounts to such holders.
    

    If COMSAT  fails  to  make  interest payments  on  the  Junior  Subordinated
Debentures   purchased  by  COMSAT  Capital  I,   COMSAT  Capital  I  will  have
insufficient funds to pay dividends  on the Preferred Securities. The  Guarantee
does  not cover payment of dividends or the Redemption Price when COMSAT Capital
I does not have sufficient funds to pay such dividends or Redemption Price.

    Because the  Guarantee is  a guarantee  of payment  and not  of  collection,
holders  of  the Preferred  Securities may  proceed  directly against  COMSAT as
guarantor, rather  than  having  to  proceed against  COMSAT  Capital  I  before
attempting  to collect  from COMSAT,  and COMSAT waives  any right  or remedy to
require that any action be brought against COMSAT Capital I or any other  person
or  entity  before  proceeding  against COMSAT.  Such  obligations  will  not be
discharged except by payment of the Guarantee Payments in full.

   
    For a  discussion of  certain  effects of  the  Guarantee, see  "Effects  of
Obligations Under the Junior Subordinated Debentures and the Guarantee".
    

CERTAIN COVENANTS OF COMSAT

    In  the  Guarantee, COMSAT  will  covenant that,  so  long as  any Preferred
Securities remain outstanding, COMSAT will not  declare or pay any dividend  on,
or  redeem, purchase, acquire or make a liquidation payment with respect to, any
of its capital stock (other  than as a result  of a reclassification of  capital
stock  or the exchange or conversion of one class or series of capital stock for
another class or  series of capital  stock) or make  any guarantee payment  with
respect  to the foregoing if at such time (i) COMSAT has exercised its option to
defer interest payments on the Junior Subordinated Debentures and such  deferral
is  continuing, (ii) COMSAT shall  be in default with  respect to its payment or
other obligations under  the Guarantee or  (iii) there shall  have occurred  any
event  that, with  the giving  of notice  or the  lapse of  time or  both, would
constitute an Event of Default under the Indenture.

                                       19
<PAGE>
    COMSAT will also covenant that, so  long as any of the Preferred  Securities
are  outstanding, it will (i) maintain  direct 100% ownership of the partnership
interests in COMSAT  Capital I other  than the Preferred  Securities (except  as
permitted  in the Limited Partnership Agreement), (ii)  cause at least 3% of the
total value of COMSAT Capital I and at least 3% of all interest in the  capital,
income,  gain, loss,  deduction and  credit of  COMSAT Capital  I to  be held by
COMSAT, as General Partner, (iii) not voluntarily dissolve, wind-up or liquidate
itself or COMSAT Capital I, (iv)  remain the General Partner and timely  perform
all  of its duties as General Partner of COMSAT Capital I (including the duty to
cause  COMSAT  Capital  I  to  declare  and  pay  dividends  on  the   Preferred
Securities),  unless a permitted successor General Partner is appointed, and (v)
subject to the  terms of  the Preferred  Securities, use  reasonable efforts  to
cause  COMSAT Capital I  to remain a Delaware  limited partnership and otherwise
continue not to be treated as an association taxable as a corporation for United
States federal income  tax purposes, except,  in all cases,  in connection  with
certain  mergers,  consolidations  or  amalgamations  permitted  by  the Limited
Partnership Agreement. See "Description of  the Preferred Securities --  Merger,
Consolidation or Amalgamation of COMSAT Capital I".

AMENDMENTS AND ASSIGNMENT

    Except  with respect to any changes which do not adversely affect the rights
of holders of Preferred Securities (in which case no vote will be required), the
Guarantee may be changed only with the prior approval of the holders of not less
than 66 2/3% in liquidation preference of the outstanding Preferred  Securities.
The manner of obtaining any such approval of holders of the Preferred Securities
will  be as set forth  under "Description of the  Preferred Securities -- Voting
Rights". All guarantees and agreements contained in the Guarantee shall bind the
successors, assigns, receivers, trustees and representatives of COMSAT and shall
inure  to  the  benefit  of  the  holders  of  the  Preferred  Securities   then
outstanding.  Except in  connection with any  merger or  consolidation of COMSAT
with or into another entity or any sale, transfer or lease of COMSAT's assets to
another entity complying with the provisions under "-- Consolidation, Merger  or
Sale  of  Assets"  below, COMSAT  may  not  assign its  rights  or  delegate its
obligations under the Guarantee without the prior approval of the holders of not
less than  66 2/3%  of the  aggregate liquidation  preference of  the  Preferred
Securities then outstanding.

TERMINATION OF THE GUARANTEE

    The Guarantee will terminate and be of no further force and effect as to the
Preferred  Securities upon full payment of the Redemption Price of all Preferred
Securities, and  will terminate  completely  upon full  payment of  the  amounts
payable  upon liquidation of COMSAT Capital I. The Guarantee will continue to be
effective or will be reinstated, as the case  may be, if at any time any  holder
of  Preferred  Securities  must restore  payment  of  any sums  paid  under such
Preferred Securities or the Guarantee.

CONSOLIDATION, MERGER OR SALE OF ASSETS

    The Guarantee provides  that COMSAT may  merge or consolidate  with or  into
another  entity, may permit another entity to  merge or consolidate with or into
COMSAT and may sell, transfer or lease all or substantially all of its assets to
another entity, if (i) at such time no Event of Default shall have occurred  and
be continuing, or would occur as a result of such merger, consolidation or sale,
transfer  or lease  and (ii)  the survivor  of such  merger or  consolidation or
entity to  which COMSAT  assets are  sold, transferred  or leased  is an  entity
organized under the laws of the United States of America or any state thereof or
the  District of Columbia, becomes the  General Partner, assumes all of COMSAT's
obligations under the Guarantee and has a net worth equal to at least 10% of the
total contributions to COMSAT Capital I.

STATUS OF THE GUARANTEE -- SUBORDINATION

    The Guarantee will  constitute an  unsecured obligation of  COMSAT and  will
rank  (i)  subordinate and  junior in  right  of payment  to all  liabilities of
COMSAT, (ii) PARI PASSU with the  most senior preferred or preference stock  now
or  hereafter issued by COMSAT  and with any guarantee  now or hereafter entered
into by COMSAT  in respect  of any preferred  or preference  stock or  preferred
securities  of  any affiliate  of COMSAT,  and (iii)  senior to  COMSAT's common
stock. The Limited Partnership Agreement provides that each holder of  Preferred
Securities  by  acceptance thereof  agrees to  the subordination  provisions and
other terms of the Guarantee. Upon the bankruptcy, liquidation or winding-up  of
COMSAT, its obligations

                                       20
<PAGE>
under  the Guarantee will rank junior to  all its other liabilities (except that
such obligations  will  rank PARI  PASSU  with COMSAT's  obligations  under  any
guarantee now or hereafter entered into by COMSAT in respect of any preferred or
preference  stock  or  preferred securities  of  any affiliate  of  COMSAT) and,
therefore, funds may  not be available  for payment under  the Guarantee. As  of
March  31, 1995, COMSAT had approximately $1.15 billion of indebtedness or other
obligations which effectively rank senior  to the Guarantee and no  indebtedness
that would rank equally with the Guarantee.

    The  Guarantee will constitute a guarantee of payment and not of collection.
The Guarantee will  be deposited with  the General  Partner to be  held for  the
benefit  of  the  holders of  the  Preferred  Securities. In  the  event  of the
appointment of  a Special  Representative to,  among other  things, enforce  the
Guarantee,  the Special Representative may take  possession of the Guarantee for
such purpose. If  no Special Representative  has been appointed  to enforce  the
Guarantee,  the General Partner has the right to enforce the Guarantee on behalf
of the holders of the Preferred Securities. The holders of not less than 10%  in
aggregate  liquidation preference  of all outstanding  Preferred Securities have
the right to direct the time, method and place of conducting any proceeding  for
any  remedy  available in  respect  of the  Guarantee,  including the  giving of
directions to the General Partner or the Special Representative, as the case may
be. If the General  Partner or the Special  Representative fails to enforce  the
Guarantee  as above provided, any holder of Preferred Securities may institute a
legal proceeding  directly  against  COMSAT  to enforce  its  rights  under  the
Guarantee, without first instituting a legal proceeding against COMSAT Capital I
or  any other person or  entity. The Guarantee will  not be discharged except by
payment of the  Guarantee Payments  in full  to the  extent not  paid by  COMSAT
Capital I and by complete performance of all obligations under the Guarantee.

GOVERNING LAW

    The  Guarantee will be governed by and construed in accordance with the laws
of the State of New York.

                                       21
<PAGE>
               DESCRIPTION OF THE JUNIOR SUBORDINATED DEBENTURES

   
    SET  FORTH  BELOW  IS  A  SUMMARY  OF  ALL  MATERIAL  TERMS  OF  THE  JUNIOR
SUBORDINATED  DEBENTURES IN WHICH COMSAT CAPITAL I WILL INVEST WITH THE PROCEEDS
OF THE ISSUANCE AND SALE  OF (I) THE PREFERRED  SECURITIES AND (II) THE  GENERAL
PARTNER'S  CAPITAL CONTRIBUTION  WITH RESPECT  TO THE  PREFERRED SECURITIES (THE
"GENERAL PARTNERSHIP PAYMENT"). THE SUMMARY DOES NOT PURPORT TO BE COMPLETE  AND
IS  QUALIFIED IN ITS  ENTIRETY BY REFERENCE TO  THE INDENTURE (THE "INDENTURE"),
DATED AS OF            , 1995,  BETWEEN COMSAT AND  THE FIRST  NATIONAL BANK  OF
CHICAGO, AS TRUSTEE (THE "TRUSTEE"), THE FORM OF WHICH IS FILED AS AN EXHIBIT TO
THE  REGISTRATION  STATEMENT OF  WHICH THIS  PROSPECTUS  FORMS A  PART. WHENEVER
PARTICULAR PROVISIONS OR DEFINED TERMS IN THE INDENTURE ARE REFERRED TO  HEREIN,
SUCH  PROVISIONS OR DEFINED TERMS ARE  INCORPORATED BY REFERENCE HEREIN. SECTION
AND ARTICLE REFERENCES USED HEREIN ARE REFERENCES TO PROVISIONS OF THE INDENTURE
UNLESS OTHERWISE NOTED.
    

    Under certain circumstances  involving the dissolution  of COMSAT Capital  I
following  the occurrence  of a  Tax Event  or Investment  Company Event, Junior
Subordinated Debentures  may be  distributed  to the  holders of  the  Preferred
Securities in liquidation of COMSAT Capital I. See "Description of the Preferred
Securities -- Tax Event or Investment Company Event Redemption or Distribution".

GENERAL

   
    The  Junior Subordinated Debentures  will be limited  in aggregate principal
amount to  approximately  $206.2 million,  such  amount  being the  sum  of  the
aggregate  stated  liquidation preference  of the  Preferred Securities  and the
General Partnership Payment.
    

    The entire  principal  amount of  the  Junior Subordinated  Debentures  will
become  due and payable, together with  any accrued and unpaid interest thereon,
including Additional Interest, if any, on        , 2025, subject to the election
of COMSAT to extend the maturity date of the Junior Subordinated Debentures to a
date not later  than           , 2044,  provided that  COMSAT satisfies  certain
financial covenants. See "-- Option to Extend Maturity Date".

    The  Junior Subordinated Debentures, if  distributed to holders of Preferred
Securities in a dissolution of COMSAT Capital  I, will initially be issued as  a
Global  Security. In the event that Junior Subordinated Debentures are issued in
certificated form, such Junior Subordinated Debentures will be in  denominations
of $25 and integral multiples thereof and may be transferred or exchanged at the
offices described below.

   
    Payments  on Junior Subordinated Debentures issued as a Global Security will
be made to DTC, as the depository for the Junior Subordinated Debentures. In the
event Junior Subordinated Debentures are issued in certificated form,  principal
and interest will be payable, the transfer of the Junior Subordinated Debentures
will  be registrable and Junior Subordinated Debentures will be exchangeable for
Junior Subordinated  Debentures  of  other denominations  of  a  like  aggregate
principal amount at the corporate trust office of the Trustee in The City of New
York;  provided, that,  unless the  Junior Subordinated  Debentures are  held by
COMSAT Capital  I  or  any  successor  permissible  under  "Description  of  the
Preferred  Securities -- Merger, Consolidation or Amalgamation of COMSAT Capital
I" (in which case payment shall be  made by wire transfer), payment of  interest
may  be made  at the  option of  COMSAT by  check mailed  to the  address of the
persons entitled thereto.
    

    If the  Junior Subordinated  Debentures are  distributed to  the holders  of
Preferred  Securities upon the dissolution of  COMSAT Capital I, COMSAT will use
its best efforts  to list  the Junior Subordinated  Debentures on  the New  York
Stock  Exchange or on such  other exchange as the  Preferred Securities are then
listed and traded on the same part of any such exchange.

   
INTEREST
    

    Each Junior Subordinated Debenture will bear interest at  the rate of      %
per  annum from the original date of issuance, payable monthly in arrears on the
last day of each calendar month of each year (each, an "Interest Payment Date"),
commencing        ,  1995, to the person in whose name such Junior  Subordinated
Debenture is registered, subject to certain exceptions, at the close of business
on

                                       22
<PAGE>
the  Business Day next preceding such  Interest Payment Date; provided, however,
that in  the event  the Junior  Subordinated Debentures  shall not  continue  to
remain  in book-entry-only  form, COMSAT shall  have the right  to select record
dates which shall be more  than one Business Day  prior to the Interest  Payment
Date. Interest will compound monthly and will accrue at the annual rate of     %
on any interest installment not paid when due.

    The  amount of interest payable for any period will be computed on the basis
of a 360-day year of twelve 30-day months.  In the event that any date on  which
interest is payable on the Junior Subordinated Debentures is not a Business Day,
then  payment of  the interest  payable on such  date will  be made  on the next
succeeding day  which is  a Business  Day  (and without  any interest  or  other
payment  in respect of any such delay), except  that, if such Business Day is in
the next succeeding calendar year, such payment shall be made on the immediately
preceding Business Day, in each case with  the same force and effect as if  made
on such date.

OPTION TO EXTEND MATURITY DATE

    The  maturity date of the  Junior Subordinated Debentures is          , 2025
(the "Scheduled Maturity Date").  COMSAT, however, may,  prior to the  Scheduled
Maturity  Date, extend such  maturity date no more  than one time,  for up to an
additional 19 years from the Scheduled  Maturity Date, provided that (i)  COMSAT
is  not in bankruptcy or  otherwise insolvent, (ii) COMSAT  is not in default on
any series  of Junior  Subordinated  Debentures, (iii)  COMSAT has  made  timely
payments  on the Junior Subordinated Debentures for the immediately preceding 18
months without deferrals, (iv) COMSAT Capital I is not in arrears on payments of
distributions on Preferred  Securities, (v) the  Junior Subordinated  Debentures
shall  continue  to  pay interest  at  least at  a  rate  equal to  the  rate of
distributions  that  accrue  on  the  Preferred  Securities,  (vi)  the   Junior
Subordinated  Debentures  are  rated  Investment  Grade  by  Standard  &  Poor's
Corporation, Moody's Investors  Service, Inc., Fitch  Investor Services, Duff  &
Phelps  Credit  Rating Company  or any  other nationally  recognized statistical
rating organization, and  (vii) the  final maturity of  the Junior  Subordinated
Debentures  is  not later  than  the 49th  anniversary  of the  issuance  of the
Preferred Securities.

OPTION TO EXTEND INTEREST PAYMENT PERIOD

    COMSAT shall  have the  right at  any time  during the  term of  the  Junior
Subordinated  Debentures to extend the interest payment period from time to time
to a period not exceeding 60 consecutive months (the "Extension Period"), at the
end of which  Extension Period COMSAT  shall pay all  interest then accrued  and
unpaid  (together with  interest thereon  at the  rate specified  for the Junior
Subordinated Debentures to the extent permitted by applicable law). In no  event
shall any Extension Period extend beyond the maturity of the Junior Subordinated
Debentures.  During any  Extension Period, COMSAT  shall not declare  or pay any
dividend on, or  redeem, purchase, acquire  or make a  liquidation payment  with
respect  to, any  of its  capital stock.  Prior to  the termination  of any such
Extension Period,  COMSAT  may  further  extend  the  interest  payment  period,
provided  that such Extension Period together with all such previous and further
extensions thereof may not exceed 60 consecutive months. Upon the termination of
any Extension Period and the payment of all amounts then due, COMSAT may  select
a new Extension Period, subject to the above requirements. No interest during an
Extension Period, except at the end thereof, shall be due and payable. If COMSAT
Capital I shall be the sole holder of the Junior Subordinated Debentures, COMSAT
shall give COMSAT Capital I notice of its selection of such Extension Period one
Business Day prior to the earlier of (i) the date the dividends on the Preferred
Securities  are payable or  (ii) the date  COMSAT Capital I  is required to give
notice to  the  New York  Stock  Exchange or  other  applicable  self-regulatory
organization or to holders of the Preferred Securities of the record date or the
date  such dividend is payable, but in any  event not less than one Business Day
prior to such record date. COMSAT shall cause COMSAT Capital I to give notice of
COMSAT's selection of  such Extension  Period to  the holders  of the  Preferred
Securities.  If COMSAT  Capital I  shall not  be the  sole holder  of the Junior
Subordinated  Debentures,  COMSAT   shall  give  the   holders  of  the   Junior
Subordinated  Debentures notice  of its selection  of such  Extension Period ten
Business Days prior to the earlier of (i) the Interest Payment Date or (ii)  the
date   COMSAT   is   required   to   give  notice   to   the   New   York  Stock

                                       23
<PAGE>
Exchange or other applicable self-regulatory organization, or to holders of  the
Junior  Subordinated Debentures, of  the record or payment  date of such related
interest payment, but in any event not less than two Business Days prior to such
record date.

ADDITIONAL INTEREST

    If at any time  COMSAT Capital I  shall be required to  pay any interest  on
dividends  in respect of the Preferred Securities pursuant to the terms thereof,
then COMSAT will pay as interest to COMSAT Capital I as the holder of the Junior
Subordinated Debentures ("Additional Interest") an amount equal to such interest
on dividends in arrears. In addition, if  COMSAT Capital I would be required  to
pay  any taxes, duties,  assessments or governmental  charges of whatever nature
(other than withholding taxes) imposed by the United States, or any other taxing
authority, then, in any such case,  COMSAT also will pay as Additional  Interest
such  amounts as shall be required so that the net amounts received and retained
by COMSAT  Capital  I  after  paying any  such  taxes,  duties,  assessments  or
governmental  charges will be not  less than the amounts  COMSAT Capital I would
have received had  no such  taxes, duties, assessments  or governmental  charges
been imposed.

MANDATORY PREPAYMENT

    If  COMSAT Capital  I redeems  Preferred Securities  in accordance  with the
terms thereof, the Junior Subordinated Debentures will become due and payable in
a principal amount equal to the  aggregate stated liquidation preference of  the
Preferred  Securities so redeemed, together with any accrued and unpaid interest
thereon, including Additional  Interest, if  any. Any payment  pursuant to  this
provision  shall be made prior to 12:00 noon, New York time, on the date of such
redemption or at  such other  time on  such earlier  date as  COMSAT and  COMSAT
Capital  I shall agree.  The Junior Subordinated Debentures  are not entitled to
the benefit of any sinking fund.

OPTIONAL REDEMPTION

    COMSAT shall have  the right  to redeem the  Junior Subordinated  Debentures
without  premium or penalty, in whole or in part, concurrent with the redemption
by COMSAT Capital I of the Preferred Securities (if any Preferred Securities are
then outstanding), at any time or from time to time on  or after        ,  2000,
upon not less than 30 nor more than 60 days' notice, at a redemption price equal
to  100% of  the principal  amount to  be redeemed  plus any  accrued and unpaid
interest, including Additional Interest, if any, to the redemption date.

   
    In the event of any redemption in part, COMSAT shall not be required to  (i)
issue,  register the transfer  of or exchange  any Junior Subordinated Debenture
during a  period  beginning  at the  opening  of  business 15  days  before  any
selection  for redemption  of Junior Subordinated  Debentures and  ending at the
close of  business  on  the  earliest  date in  which  the  relevant  notice  of
redemption  is deemed to have  been given to all  holders of Junior Subordinated
Debentures and (ii) register the transfer of or exchange any Junior Subordinated
Debentures so  selected  for  redemption,  in  whole  or  in  part,  except  the
unredeemed  portion of any Junior Subordinated Debenture being redeemed in part.
(Section 1201).
    

SUBORDINATION

    The  Indenture  provides  that   the  Junior  Subordinated  Debentures   are
subordinate  and junior in right of payment to all Senior Indebtedness of COMSAT
as provided in the Indenture. No  payment of principal of (including  redemption
payments), or interest on, the Junior Subordinated Debentures may be made (i) if
any  Senior Indebtedness is not paid when  due, any applicable grace period with
respect to such default has ended and such default has not been cured or waived,
or (ii) if the maturity of any Senior Indebtedness has been accelerated  because
of  a default. Upon any  distribution of assets of  COMSAT to creditors upon any
dissolution, winding-up,  liquidation or  reorganization, whether  voluntary  or
involuntary or in bankruptcy, insolvency, receivership or other proceedings, all
principal  of, and premium,  if any, and interest  due or to  become due on, all
Senior Indebtedness  must be  paid in  full  before the  holders of  the  Junior
Subordinated  Debentures  are entitled  to receive  or  retain any  payment. The
rights of the holders of the  Junior Subordinated Debentures will be  subrogated
to  the rights  of the  holders of  Senior Indebtedness  to receive  payments or
distributions   applicable   to   Senior   Indebtedness   until   all    amounts

                                       24
<PAGE>
   
owing  on the Junior Subordinated Debentures are paid in full. (Sections 1101 to
1105). However, since  Senior Indebtedness  currently is not  secured and  ranks
PARI  PASSU with other  unsecured indebtedness of  COMSAT, rights of subrogation
currently do not improve the position of the holders of the Junior  Subordinated
Debentures  in relation  to the holders  of any other  unsecured indebtedness of
COMSAT.
    

   
    The term "Senior Indebtedness" shall mean the principal of, premium, if any,
interest on and any other payment due pursuant to any of the following,  whether
outstanding  at the date  of execution of the  Indenture or thereafter incurred,
created  or  assumed:  (i)  all  indebtedness  of  COMSAT  evidenced  by  notes,
debentures, bonds or other securities sold by COMSAT for money; (ii) all capital
lease  obligations  of COMSAT;  (iii) all  indebtedness of  others of  the kinds
described in the preceding clauses (i) and (ii) assumed by or guaranteed in  any
manner  by COMSAT  or in  effect guaranteed  by COMSAT;  and (iv)  all renewals,
extensions or refundings of  indebtedness of the kinds  described in any of  the
preceding  clauses (i),  (ii) and (iii);  provided, however,  that the following
shall not constitute Senior Indebtedness: (a) any indebtedness of COMSAT to  any
subsidiary  of  COMSAT, or  (b)  any indebtedness,  which  by the  terms  of the
instrument  creating  or  evidencing  the  same  expressly  provides  that  such
indebtedness  is not superior in  right of payment to or  is PARI PASSU with the
Junior Subordinated Debentures.  Such Senior Indebtedness  shall continue to  be
Senior Indebtedness and entitled to the benefits of the subordination provisions
irrespective of any amendment, modification or waiver of any term of such Senior
Indebtedness. (Section 101).
    

    The  Indenture does  not limit the  aggregate amount  of Senior Indebtedness
which may be issued. At March 31, 1995, Senior Indebtedness of COMSAT aggregated
approximately $751 million.

CERTAIN COVENANTS OF COMSAT

   
    COMSAT will covenant that,  subject to certain  limited exceptions, it  will
not,  directly  or  indirectly,  declare  or pay  any  dividend  on,  or redeem,
purchase, acquire or make a distribution or liquidation payment with respect to,
any of its  capital stock or  make any  guarantee payments with  respect to  the
foregoing,  if at such time  (i) there shall have  occurred any event that would
constitute an Event  of Default  under the Indenture,  (ii) COMSAT  shall be  in
default  with respect to its  payment of any obligations  under the Guarantee or
(iii) COMSAT shall have  given notice of its  selection of an extended  interest
payment  period as provided in  the Indenture and such  period, or any extension
thereof, shall be continuing. COMSAT will  also covenant (i) to remain the  sole
general  partner of COMSAT Capital I and  maintain 100% ownership of the general
partnership interests thereof; provided that  any permitted successor of  COMSAT
under  the Indenture may succeed to COMSAT's  duties as General Partner, (ii) to
contribute capital  in an  amount equal  to at  least 3%  of the  total  capital
contributions to COMSAT Capital I, (iii) not to voluntarily dissolve, wind-up or
terminate COMSAT Capital I, except in connection with the distribution of Junior
Subordinated Debentures to the holders of Preferred Securities in liquidation of
COMSAT Capital I pursuant to the Limited Partnership Agreement and in connection
with  certain mergers, consolidations or  amalgamations permitted by the Limited
Partnership Agreement, (iv) to timely perform  all of its duties as the  general
partner  in COMSAT Capital I (including the duty to declare and pay dividends on
the Preferred Securities) and (v) to use its reasonable efforts to cause  COMSAT
Capital  I to  remain a  limited partnership  except in  connection with certain
mergers, consolidations or  amalgamations permitted by  the Limited  Partnership
Agreement  and otherwise continue not to be treated as an association taxable as
a corporation for United States federal income tax purposes. (Section 1006).
    

EVENTS OF DEFAULT

   
    The Indenture  provides that  any one  or more  of the  following  described
events,  which has occurred and is continuing, constitutes an "Event of Default"
with respect to the Junior Subordinated  Debentures: (i) failure for 10 days  to
pay  interest on  the Junior  Subordinated Debentures,  including any Additional
Interest in  respect thereof,  when due;  or (ii)  failure to  pay principal  or
premium,  if any,  on the  Junior Subordinated  Debentures when  due, whether at
maturity, upon  redemption by  declaration  or otherwise;  or (iii)  failure  to
observe or perform any other covenant (other than those specifically relating to
another series of Junior Subordinated Debentures) contained in the Indenture for
90 days after notice; or (iv) the
    

                                       25
<PAGE>
   
dissolution,  winding-up or termination  (other than any  termination within the
meaning  of  section  708(b)(1)(B)  of  the  Code  or  equivalent  provision  of
subsequent  law, which termination  does not constitute  a termination of COMSAT
Capital I for any other purpose) of COMSAT Capital I, except in connection  with
the  distribution of Junior Subordinated Debentures  to the holders of Preferred
Securities  in  liquidation  of  COMSAT  Capital  I  pursuant  to  the   Limited
Partnership  Agreement and in connection with certain mergers, consolidations or
amalgamations permitted by  the Limited  Partnership Agreement;  or (v)  certain
events in bankruptcy, insolvency or reorganization of COMSAT. (Section 501).
    

   
    The  Trustee or the  holders of not  less than 25%  in aggregate outstanding
principal amount of the Junior Subordinated Debentures may declare the principal
of and interest (including any  Additional Interest) on the Junior  Subordinated
Debentures due and payable immediately on default; provided, however, that after
such  acceleration, but before  a judgment or decree  based on acceleration, the
holders of  a  majority in  aggregate  principal amount  of  outstanding  Junior
Subordinated Debentures may, under certain circumstances, rescind and annul such
acceleration if all Events of Default, other than the non-payment of accelerated
principal,  have been  cured or  waived as  provided in  the Indenture. (Section
502).
    

    COMSAT  Capital  I  is  the  initial  holder  of  the  Junior   Subordinated
Debentures.  However,  while the  Preferred  Securities are  outstanding, COMSAT
Capital I has agreed not to waive an Event of Default with respect to the Junior
Subordinated Debentures without the consent of  holders of 66 2/3% in  aggregate
liquidation  preference of the Preferred  Securities then outstanding. A default
under any other indebtedness of COMSAT or COMSAT Capital I would not  constitute
an Event of Default under the Junior Subordinated Debentures.

   
    Subject  to the  provision of  the Indenture relating  to the  duties of the
Trustee in case an Event of Default  shall occur and be continuing, the  Trustee
will  be under no obligation  to exercise any of its  rights or powers under the
Indenture at the  request or  direction of  any holders  of Junior  Subordinated
Debentures,  unless such  holders shall have  offered to  the Trustee reasonable
indemnity. Subject to such  provisions for the  indemnification of the  Trustee,
the  holders of a majority in  aggregate principal amount of Junior Subordinated
Debentures then outstanding will have the  right to direct the time, method  and
place  of conducting any proceeding for any  remedy available to the Trustee, or
exercising any  trust or  power conferred  on the  Trustee with  respect to  the
Junior Subordinated Debentures.
    

   
    No  holder  of any  Junior  Subordinated Debenture  will  have any  right to
institute any  proceeding  with respect  to  the  Indenture or  for  any  remedy
thereunder,  unless  such  holder shall  have  previously given  to  the Trustee
written notice of a continuing Event of Default and, if COMSAT Capital I is  not
the sole holder of Junior Subordinated Debentures, unless also the holders of at
least  25% in aggregate  principal amount of  the Junior Subordinated Debentures
then outstanding  shall  have  made  written  request,  and  offered  reasonable
indemnity,  to  the Trustee  to institute  such proceeding  as Trustee,  and the
Trustee shall not  have received  from the holders  of a  majority in  aggregate
principal  amount of the outstanding  Junior Subordinated Debentures a direction
inconsistent  with  such  request  and  shall  have  failed  to  institute  such
proceeding  within 60  days. However,  such limitations do  not apply  to a suit
instituted by a  holder of a  Junior Subordinated Debenture  for enforcement  of
payment of the principal of or interest on such Junior Subordinated Debenture on
or  after  the  respective  due  dates  expressed  in  such  Junior Subordinated
Debenture. (Section 507).
    

   
    The holders of a majority in  aggregate outstanding principal amount of  the
Junior  Subordinated Debentures may, on behalf of  the holders of all the Junior
Subordinated Debentures, waive any past default, except a default in the payment
of principal or  interest. (Section 513).  COMSAT is required  to file  annually
with the Trustee a certificate as to whether or not COMSAT is in compliance with
all the conditions and covenants under the Indenture. (Section 1004).
    

ENFORCEMENT OF CERTAIN RIGHTS BY SPECIAL REPRESENTATIVE

   
    If  (i) COMSAT  Capital I fails  to pay  dividends in full  on the Preferred
Securities for 18  consecutive months; (ii)  an Event of  Default occurs and  is
continuing on the Junior Subordinated Debentures; or
    

                                       26
<PAGE>
   
(iii)  COMSAT is in default on any of its payment of other obligations under the
Guarantee,  under  the  terms  of  the  Preferred  Securities,  the  holders  of
outstanding  Preferred  Securities  will  have  the  rights  referred  to  under
"Description of the Preferred Securities -- Voting Rights", including the  right
to  appoint  a Special  Representative,  which Special  Representative  shall be
authorized to  exercise COMSAT  Capital I's  right to  accelerate the  principal
amount  of the Junior Subordinated Debentures  and to enforce COMSAT Capital I's
other  creditor  rights  under  the   Indenture  and  the  Junior   Subordinated
Debentures.  Notwithstanding the appointment of any such Special Representative,
COMSAT shall continue as General Partner  and shall retain all rights under  the
Indenture,  including the right to extend  the interest payment period from time
to time to a period not exceeding 60 consecutive months.
    

MODIFICATION OF THE INDENTURE

   
    The Indenture contains  provisions permitting COMSAT  and the Trustee,  with
the  consent of the holders  of not less than a  majority in principal amount of
the Junior Subordinated Debentures, to modify the Indenture or any  supplemental
indenture  thereto; provided, that no such modification may, without the consent
of the holder of each outstanding Junior Subordinated Debenture, (i) extend  the
fixed maturity of the principal of (other than in accordance with the provisions
of  the Indenture)  or any  installment of  interest on  any Junior Subordinated
Debentures, or reduce the principal amount thereof, or reduce the rate or extend
the time of payment  of interest thereon  without the consent  of the holder  of
each  Junior Subordinated Debenture  so affected, (ii)  reduce the percentage of
Junior Subordinated Debentures, the holders of which are required to consent  to
any  such supplemental  indenture, without  the consent  of the  holders of each
Junior Subordinated Debenture  then outstanding  and affected  thereby or  (iii)
modify  any provision of the Indenture relating to waivers of past defaults, the
additional covenants of COMSAT or supplemental indentures requiring the  consent
of  holders of  the Junior Subordinated  Debentures, other than  to increase the
percentage in principal amount of  Junior Subordinated Debentures whose  consent
is required pursuant to such provisions or to require the consent of each holder
of  Junior Subordinated Debentures  to amend other  provisions of the Indenture.
(Section 902).
    

   
    In addition, COMSAT and the Trustee may execute, without the consent of  any
holder of Junior Subordinated Debentures, any supplemental indenture for certain
other usual purposes. (Section 901).
    

CONSOLIDATION, MERGER OR SALE OF ASSETS

   
    The Indenture does not contain any covenant which restricts COMSAT's ability
to  merge or consolidate with or into  any other corporation, sell or convey all
or substantially  all  of its  assets  to any  person,  firm or  corporation  or
otherwise engage in restructuring transactions. (Section 801).
    

DEFEASANCE AND DISCHARGE

   
    Under the terms of the Indenture, COMSAT will be discharged from any and all
obligations  in respect  of the Junior  Subordinated Debentures  (except in each
case for certain  obligations to  register the  transfer or  exchange of  Junior
Subordinated  Debentures, replace stolen, lost  or mutilated Junior Subordinated
Debentures, maintain paying agencies, hold moneys  for payment in trust and  pay
Additional  Interest when  due) if COMSAT  deposits with the  Trustee, in trust,
moneys or U.S. Government  Obligations, in an amount  sufficient to pay all  the
principal  of, and interest on, the  Junior Subordinated Debentures on the dates
such payments are due in accordance  with the terms of such Junior  Subordinated
Debentures.  Such defeasance or discharge may occur only if, among other things,
COMSAT has delivered to  the Trustee an  Opinion of Counsel  to the effect  that
COMSAT  has received  from, or  there has been  published by,  the United States
Internal Revenue Service  a ruling, or  there has been  a change in  tax law  in
either  case to the  effect that holders of  Junior Subordinated Debentures will
not recognize gain or loss for federal  income tax purposes as a result of  such
defeasance  and will be subject to federal income tax on the same amount, in the
same manner and at the same time as would have been the case if such  defeasance
was not to occur. (Sections 401 and 403).
    

                                       27
<PAGE>
SET-OFF

    Notwithstanding anything to the contrary in the Indenture, COMSAT shall have
the  right  to  set-off any  payment  with  respect to  the  Junior Subordinated
Debentures it is otherwise  required to make thereunder  with and to the  extent
COMSAT  has theretofore  made, or  is concurrently on  the date  of such payment
making, a payment under the Guarantee.

GOVERNING LAW

   
    The Indenture and the  Junior Subordinated Debentures  will be governed  by,
and  construed in accordance with,  the laws of the  State of New York. (Section
113).
    

INFORMATION CONCERNING THE TRUSTEE

   
    The Trustee, prior to default, undertakes to perform only such duties as are
specifically set forth in the Indenture  and, after default, shall exercise  the
same degree of care as a prudent individual would exercise in the conduct of his
or  her own affairs.  (Section 601). Subject  to such provision,  the Trustee is
under no obligation to exercise any of the powers vested in it by the  Indenture
at  the request of any holder  of Junior Subordinated Debentures, unless offered
reasonable indemnity by such holder against the costs, expenses and  liabilities
which  might be incurred thereby. (Section 603).  The Trustee is not required to
expend or risk its own funds or otherwise incur personal financial liability  in
the  performance of its duties if the Trustee reasonably believes that repayment
or adequate indemnity is not reasonably assured to it. (Section 601).
    

                                       28
<PAGE>
                        EFFECT OF OBLIGATIONS UNDER THE
                JUNIOR SUBORDINATED DEBENTURES AND THE GUARANTEE

    As  set  forth in  the Limited  Partnership Agreement,  the sole  purpose of
COMSAT Capital  I is  to issue  the Preferred  Securities and  use the  proceeds
thereof to purchase from COMSAT the Junior Subordinated Debentures.

    As  long as payments of interest and other payments are made when due on the
Junior Subordinated  Debentures,  such  payments will  be  sufficient  to  cover
dividends and payments due on the Preferred Securities primarily because (i) the
aggregate  principal amount of  Junior Subordinated Debentures  will be equal to
the sum  of  the  aggregate  stated  liquidation  preference  of  the  Preferred
Securities  and  the General  Partnership Payment;  (ii)  the interest  rate and
interest and  other payment  dates on  the Junior  Subordinated Debentures  will
match  the dividend rate and dividend and  other payment dates for the Preferred
Securities; (iii) the  Limited Partnership  Agreement provides  that COMSAT,  as
General  Partner, shall pay for all, and COMSAT Capital I shall not be obligated
to pay, directly or indirectly, for any, costs and expenses of COMSAT Capital I;
and (iv) the  Limited Partnership  Agreement further provides  that the  General
Partner  shall not  cause or  permit COMSAT  Capital I  to, among  other things,
engage in  any activity  that is  not  consistent with  the purposes  of  COMSAT
Capital I.

    If   COMSAT  fails  to  make  interest  or  other  payments  on  the  Junior
Subordinated Debentures when due, the  Limited Partnership Agreement provides  a
mechanism whereby the holders of the Preferred Securities may enforce the rights
of  COMSAT  Capital  I  under the  Junior  Subordinated  Debentures  through the
appointment of  a  Special  Representative.  Payments  of  dividends  and  other
payments  due on the Preferred Securities out of moneys held by COMSAT Capital I
are guaranteed  by COMSAT  to the  extent set  forth under  "Description of  the
Guarantee".  The Limited Partnership Agreement  also provides, and COMSAT, under
the Guarantee, acknowledges, that a  Special Representative may be appointed  to
enforce  the Guarantee if COMSAT is in default on any of its payment obligations
under the  Guarantee.  In  addition,  if the  General  Partner  or  the  Special
Representative  fails to enforce the Guarantee, a holder of a Preferred Security
may institute a legal proceeding directly  against COMSAT to enforce its  rights
under  the Guarantee without first instituting a legal proceeding against COMSAT
Capital I or any other person or entity.

   
                             UNITED STATES TAXATION
    

GENERAL

   
    This section is a summary of  all material United States federal income  tax
considerations  that  may be  relevant  to prospective  purchasers  of Preferred
Securities and represents the opinion of  Crowell & Moring, special tax  counsel
to  COMSAT and  COMSAT Capital I,  insofar as it  relates to matters  of law and
legal conclusions. This section is based upon current provisions of the Internal
Revenue Code of 1986, as amended (the "Code"), existing and proposed regulations
thereunder and current administrative rulings and court decisions, all of  which
are  subject to  change. Subsequent changes  may cause tax  consequences to vary
substantially from the consequences described below. Moreover, the  transactions
described  in this Prospectus raise certain novel tax issues which have not been
ruled on by the courts  or the Internal Revenue  Service (the "IRS") in  similar
transactions. As a result, there can be no assurance that the IRS will not audit
these  transactions  and,  if it  does  so, that  the  IRS will  agree  with the
conclusions set forth below.
    

    No attempt  has been  made in  the following  discussion to  comment on  all
United  States  federal income  tax  matters affecting  purchasers  of Preferred
Securities. Moreover, the discussion focuses on holders of Preferred  Securities
who  are individual  citizens or  residents of  the United  States, who purchase
Preferred Securities at original issue for their initial offering price and  who
hold  the  Preferred  Securities  as  a  capital  asset,  and  has  only limited
application  to  corporations,  estates,  trusts  or,  non-resident  aliens   or
taxpayers  having a taxable year other than the calendar year. Accordingly, each

                                       29
<PAGE>
prospective purchaser of Preferred Securities should consult, and should  depend
on,  his  or her  own tax  advisor in  analyzing the  federal, state,  local and
foreign tax consequences of the purchase, ownership or disposition of  Preferred
Securities.

TAX CLASSIFICATION

    Crowell  &  Moring is  of  the opinion  that (i)  COMSAT  Capital I  will be
classified as a partnership for federal income tax purposes and (ii) the  Junior
Subordinated  Debentures will be  classified as indebtedness  for federal income
tax purposes, although no assurances can be made in either regard. The following
discussion assumes such classifications.

INCOME FROM PREFERRED SECURITIES

    Each holder of Preferred Securities  (a "Preferred Securityholder") will  be
required  to include in gross income the Preferred Securityholder's distributive
share of the net income of COMSAT Capital I. If COMSAT Capital I is merged  into
a  trust that is treated as a  grantor trust, each Preferred Securityholder will
be treated as owning  directly an allocable portion  of the Junior  Subordinated
Debentures and as earning directly the income derived therefrom. In either case,
such  income will not  exceed for any  calendar month the  dividends received on
such Preferred Securities,  except in limited  circumstances as described  below
under  "Original Issue  Discount" and  "Potential Extension  of Interest Payment
Period". Any amount  so included  in a Preferred  Securityholder's gross  income
will  increase its  tax basis  in the  Preferred Securities,  and the  amount of
nonliquidating distributions  of  cash  by  COMSAT  Capital  I  to  a  Preferred
Securityholder  will  reduce such  Preferred Securityholder's  tax basis  in the
Preferred Securities (but  not below zero).  No portion of  such income will  be
eligible for the dividends received deduction.

ORIGINAL ISSUE DISCOUNT

    Under  Treasury  Regulations, the  stated  interest payments  on  the Junior
Subordinated Debentures will be treated as "original issue discount"  (sometimes
herein  referred  to for  convenience as  interest) because  of the  option that
COMSAT has, under  the terms  of the  Junior Subordinated  Debentures, to  defer
interest  payments for  up to 60  months. Under  the Code, holders  of debt with
original issue discount  must include  that discount  in income  on an  economic
accrual  basis  and before  the  receipt of  cash  attributable to  the interest
regardless of  their method  of  tax accounting.  Except  to the  extent  COMSAT
exercises  its option  to defer interest  payments, the  characterization of the
stated interest on the Junior Subordinated Debentures as original issue discount
will not  affect  the  timing  or  amount  of  income  reportable  by  Preferred
Securityholders.  In  the  event  that interest  payments  are  deferred, COMSAT
Capital I will continue  to accrue income  equal to the  amount of the  interest
payment due at the end of the Extension Period on an economic accrual basis over
the length of the Extension Period.

    Accrued  income  will  be  allocated,  but  not  distributed,  to  Preferred
Securityholders of record  on the Business  Day preceding the  last day of  each
calendar  month. As a  result, owners of  Preferred Securities on  a record date
during an Extension Period will include  interest in gross income in advance  of
the  receipt  of cash,  and any  such Preferred  Securityholder who  disposes of
Preferred Securities  prior to  the record  date for  the payment  of  dividends
following  such Extension  Period will  include such  Preferred Securityholder's
allocable share of such interest in gross  income but will not receive any  cash
related thereto.

    Holders  of Junior  Subordinated Debentures  received upon  a liquidation of
COMSAT Capital I  or deemed to  be owned by  the Preferred Securityholders  upon
merger  of COMSAT Capital I into a trust  that is taxed as a grantor trust, will
include in income interest on the Junior Subordinated Debentures as the interest
accrues (regardless of the Preferred Securityholder's method of accounting), and
thus will also recognize income in advance of the receipt of cash.

DISPOSITION OF PREFERRED SECURITIES

    Gain or loss will be recognized on a sale of Preferred Securities, including
a redemption for cash, equal to  the difference between the amount realized  and
the Preferred Securityholder's tax basis for the

                                       30
<PAGE>
Preferred Securities sold. Gain or loss recognized by a Preferred Securityholder
on the sale or exchange of a Preferred Security held for more than one year will
generally be taxable as long-term capital gain or loss.

    The  adjusted  tax basis  of the  Preferred Securities  sold will  equal the
amount paid for the Preferred Securities, plus accrued original issue  discount,
if any, as described herein allocated to the holder of such Preferred Securities
and  reduced by any cash distributed  to such Preferred Securityholder by COMSAT
Capital  I.  A  Preferred  Securityholder  acquiring  Preferred  Securities   at
different  prices may  be required to  maintain a single  aggregate adjusted tax
basis in Preferred Securities,  and, upon sale or  other disposition of some  of
the  Preferred Securities,  allocate a  pro rata  portion of  such aggregate tax
basis to the Preferred Securities sold  (rather than maintaining a separate  tax
basis  in each Preferred  Security for purposes  of computing gain  or loss on a
sale of such Preferred Security).

RECEIPT OF JUNIOR SUBORDINATED DEBENTURES UPON LIQUIDATION OR MERGER OF COMSAT
CAPITAL I

    Under certain circumstances, as described under the caption "Description  of
the  Preferred Securities -- Tax Event or Investment Company Event Redemption or
Distribution", Junior Subordinated Debentures may be distributed to the  holders
of  the Preferred Securities  in liquidation of COMSAT  Capital I. Under current
United States federal income tax law, such a distribution would be treated as  a
non-taxable  exchange to each holder of Preferred Securities and would result in
the holder  of Preferred  Securities receiving  an aggregate  tax basis  in  the
Junior Subordinated Debentures equal to such holder's aggregate tax basis in its
Preferred  Securities.  A holder's  holding  period in  the  Junior Subordinated
Debentures so received  in liquidation  of COMSAT  Capital I  would include  the
period for which the Preferred Securities were held by such holder. In addition,
a merger, consolidation or amalgamation of COMSAT Capital I into a trust that is
treated as a grantor trust would be treated in the same manner as a distribution
of the Junior Subordinated Debentures to the holders of the Preferred Securities
in  liquidation of COMSAT  Capital I followed  by a contribution  of such Junior
Subordinated Debentures to the grantor trust. Under a change in law, a change in
legal interpretation or the other circumstances giving rise to a Tax Event or an
Investment Company Event, however, the dissolution  could be a taxable event  to
holders  of the Preferred Securities. In the  judgment of special tax counsel to
COMSAT and COMSAT  Capital I, the  series of  events which would  result in  the
recognition  of taxable gain or loss by  holders of the Preferred Securities, by
reason of a dissolution of COMSAT Capital  I, is not likely to occur. There  can
be no assurance in this regard, however.

TAXATION OF HOLDERS OF GRANTOR TRUST INTERESTS

    If  COMSAT Capital I is merged into a  trust treated as a grantor trust, the
tax consequences of holding Successor Securities will differ in certain respects
from the tax consequences of  holding Preferred Securities. In general,  holders
of  Successor Securities will be required to  include in gross income the income
of the trust as such income accrues to the trust. A holder that includes amounts
in income in  advance of  the receipt  of cash from  the grantor  trust may  not
receive  the cash from the  grantor trust related to  such income if such holder
disposes of its  Successor Securities  before the  record date  with respect  to
payment  of such amounts. A holder's tax  basis in the Successor Securities will
be increased by the amount of any such accrued but unpaid income.

COMSAT CAPITAL INFORMATION RETURNS AND AUDIT PROCEDURES

    COMSAT, as  the General  Partner  in COMSAT  Capital  I, will  furnish  each
Preferred  Securityholder  with  a Schedule  K-1  each year  setting  forth such
Preferred Securityholder's  allocable share  of income  for the  prior  calendar
year. The Limited Partnership Agreement requires COMSAT to furnish such Schedule
K-1 as soon as practicable following the end of the year, but in any event prior
to  March 31. In  the event that  COMSAT Capital I  is replaced with  a trust as
previously described herein, investors will receive for tax reporting purposes a
Form 1099 instead of a Form K-1.

    Any person who holds Preferred Securities as a nominee for another person is
required to  furnish to  COMSAT Capital  I (a)  the name,  address and  taxpayer
identification  number of the beneficial owner  and the nominee; (b) information
as to whether the beneficial owner is (i)  a person that is not a United  States

                                       31
<PAGE>
person,  (ii)  a  foreign  government,  an  international  organization  or  any
wholly-owned agency or instrumentality  of either of the  foregoing, or (iii)  a
tax-exempt  entity; (c) the amount and description of Preferred Securities held,
acquired or transferred for  the beneficial owner;  and (d) certain  information
including  the dates  of acquisitions and  transfers, means  of acquisitions and
transfers, and acquisition  cost for  purchases, as well  as the  amount of  net
proceeds  from sales. The nominee is required to supply the beneficial owners of
the Preferred Securities  with the  information furnished to  COMSAT Capital  I.
Brokers   and  financial   institutions  are  required   to  furnish  additional
information, including  whether  they  are United  States  persons  and  certain
information on Preferred Securities they acquire, hold or transfer for their own
accounts. A penalty of $50 per failure (up to a maximum of $100,000 per calendar
year) is imposed by the Code for failure to report such information.

    The  General Partner,  as the tax  matters partner, will  be responsible for
representing the Preferred Securityholders in any dispute with the IRS. The Code
provides for administrative examination of  a partnership as if the  partnership
were a separate and distinct taxpayer. Generally, the statute of limitations for
partnership  items does  not expire  before three years  after the  later of the
filing or the last date  for filing of the  partnership tax return (Form  1065),
determined without regard to extensions. The General Partner, as the tax matters
partner,  will have authority to extend  the statute of limitations with respect
to partnership items  for the Preferred  Securityholders without their  consent.
Any  adverse determination following an audit of  the return of COMSAT Capital I
by the  appropriate taxing  authorities could  result in  an adjustment  of  the
returns  of the Preferred  Securityholders, and, under  certain circumstances, a
Preferred Securityholder may be precluded from separately litigating a  proposed
adjustment  to the items of the partnership.  An adjustment could also result in
an audit of  a Preferred Securityholder's  return and adjustments  of items  not
related to the income and losses of COMSAT Capital I.

POTENTIAL EXTENSION OF INTEREST PAYMENT PERIOD

    Under  the Indenture, COMSAT has  the right to extend  from time to time the
interest payment period on  the Junior Subordinated Debentures  to a period  not
exceeding  60 consecutive months. In the  event that the interest payment period
is extended, COMSAT Capital I will continue to accrue income equal to the amount
of the interest payment due at the  end of the Extension Period, on an  economic
basis over the length of the Extension Period. See "-- Original Issue Discount".

UNITED STATES ALIEN HOLDERS

    For  purposes  of this  discussion, a  "United States  Alien Holder"  is any
holder who or  which is (i)  a nonresident  alien individual or  (ii) a  foreign
corporation,  partnership  or estate  or trust,  in either  case not  subject to
United States federal income tax on a net income basis in respect of a Preferred
Security. This discussion is without regard to any income tax treaty that may be
applicable.

    Under  current  United  States  federal  income  tax  law,  subject  to  the
discussion below with respect to backup withholding:

        (i)   Payments by  COMSAT Capital I or  any of its  paying agents to any
    holder of a Preferred Security who or which is a United States Alien  Holder
    will  not be subject to United  States federal withholding tax provided that
    (a) the beneficial  owner of  the Preferred  Security does  not actually  or
    constructively  own 10% or  more of the  total combined voting  power of all
    classes of capital  stock of  COMSAT entitled  to vote,  (b) the  beneficial
    owner of the Preferred Security is not a controlled foreign corporation that
    is  related  to  COMSAT  through  stock ownership  and  (c)  either  (x) the
    beneficial owner of the Preferred Security certifies to COMSAT Capital I  or
    its  agent (generally on Form W-8 or a substitute therefor), under penalties
    of perjury, that it is  a United States Alien  Holder and provides its  name
    and  address or  (y) the  holder of the  Preferred Security  is a securities
    clearing organization,  bank  or  other  financial  institution  that  holds
    customers'  securities in  the ordinary course  of its trade  or business (a
    "financial institution"), and such holder  certifies to COMSAT Capital I  or
    its  agent under penalties of perjury  that such statement has been received
    from the beneficial owner by it or by a financial institution between it and
    the beneficial owner and furnishes COMSAT Capital I or its agent with a copy
    thereof;

                                       32
<PAGE>
        (ii) a United States Alien Holder of a Preferred Security will generally
    not be subject to United States federal withholding tax on any gain realized
    on the sale or exchange of a Preferred Security; and

        (iii) a United States Alien Holder who is a nonresident alien individual
    present in the United  States for 183  days or more in  the taxable year  of
    sale and who either has a "tax home" in the United States or with respect to
    whom  certain other requirements are met, is  generally subject to a 30% tax
    on the amount  by which  his gross  gains from  the sale  of capital  assets
    derived from U.S. sources exceed his gross losses from such sales.

    (An  alien  individual  who  satisfies the  "substantial  presence  test" of
    Section 7701(b)(3) of the Code, including an alien individual present in the
    United States for 183 days or more in the calendar year, will be taxed as  a
    resident alien individual, and not as a nonresident alien individual.)

BACKUP WITHHOLDING AND INFORMATION REPORTING

    In  general, information  reporting requirements  will apply  to payments to
noncorporate United States  holders of  the proceeds  of the  sale of  Preferred
Securities  within the United States  and "backup withholding" at  a rate of 31%
will apply to  such payments if  the United  States holder fails  to provide  an
accurate taxpayer identification number.

    Payments  of the proceeds from  the sale by a  United States Alien Holder of
Preferred Securities made to or through  a foreign office of a broker  generally
will not be subject to information reporting or backup withholding, except that,
if  the broker is a  United States person, a  controlled foreign corporation for
United States tax  purposes, or  a foreign  person 50%  or more  of whose  gross
income  is effectively connected  with a United  States trade or  business for a
specified three-year period, information reporting  may apply to such  payments.
Payments  of the proceeds  from the sale  by a noncorporate  holder of Preferred
Securities to or  through the United  States office  of a broker  is subject  to
information  reporting  and possible  backup  withholding unless  the  holder or
beneficial owner  certifies as  to  its non-United  States status  or  otherwise
establishes an exemption from information reporting and backup withholding.

                                       33
<PAGE>
                                  UNDERWRITING

   
    Subject  to the terms  and conditions of  the Underwriting Agreement, COMSAT
Capital I has agreed to sell to  each of the Underwriters named below, and  each
of such Underwriters, for whom Goldman, Sachs & Co., Smith Barney Inc., CS First
Boston  Corporation and PaineWebber Incorporated  are acting as Representatives,
has severally agreed to purchase from COMSAT Capital I, the respective number of
Preferred Securities set forth opposite its name below:
    

   
<TABLE>
<CAPTION>
                                                                                   NUMBER OF
                                                                                   PREFERRED
UNDERWRITER                                                                       SECURITIES
- -------------------------------------------------------------------------------  -------------
<S>                                                                              <C>
Goldman, Sachs & Co............................................................
Smith Barney Inc...............................................................
CS First Boston Corporation....................................................
PaineWebber Incorporated.......................................................

                                                                                 -------------
  Total........................................................................
                                                                                 -------------
                                                                                 -------------
</TABLE>
    

    Under  the  terms  and  conditions   of  the  Underwriting  Agreement,   the
Underwriters  are committed to take and pay  for all of the Preferred Securities
offered hereby, if any are taken.

    The Underwriters propose to offer the Preferred Securities in part  directly
to  the public at the initial public offering  price set forth on the cover page
of this Prospectus, and in part to certain securities dealers at such price less
a concession of $  per Preferred Security. The Underwriters may allow, and  such
dealers  may reallow, a concession not in excess of $  per Preferred Security to
certain brokers and  dealers. After  the Preferred Securities  are released  for
sale  to the public, the offering price and other selling terms may from time to
time be varied by the Representatives.

    In view  of  the  fact that  the  proceeds  of the  sale  of  the  Preferred
Securities  will be used by COMSAT Capital I to purchase the Junior Subordinated
Debentures,  the  Underwriting  Agreement  provides  that  COMSAT  will  pay  as
compensation to the Underwriters a commission of $  per Preferred Security.

    COMSAT  and COMSAT  Capital I  have agreed not  to offer,  sell, contract to
sell, or otherwise  dispose of (a)  any limited partnership  interests or  other
securities  of COMSAT  Capital I  (other than  the Preferred  Securities offered
hereby), (b) any  preferred stock or  any other securities  of COMSAT which  are
substantially similar to the Preferred Securities including the Guarantee, or to
the  Junior  Subordinated  Debentures, or  (c)  any other  securities  which are
convertible into, or exercisable or exchangeable for,

                                       34
<PAGE>
   
limited partnership interests  in or other  securities of COMSAT  Capital I,  or
preferred  stock or such substantially similar securities of COMSAT, in any such
case for a  period of 90  days after the  date of this  Prospectus, without  the
prior written consent of the Representatives.
    

    In  compliance with Section 34 of the Rules of Fair Practice of the National
Association  of  Securities  Dealers,  Inc.  ("NASD"),  no  sales  of  Preferred
Securities may be made by any NASD member to a discretionary account without the
prior written approval of the transaction by the customer.

    Prior  to this offering, there  has been no public  market for the Preferred
Securities. In order to meet one  of the requirements for listing the  Preferred
Securities  on the New  York Stock Exchange, the  Underwriters will undertake to
sell lots of 100  or more Preferred  Securities to a  minimum of 400  beneficial
holders.

    Trading  of  the Preferred  Securities  on the  New  York Stock  Exchange is
expected to commence within the seven-day  period after the initial delivery  of
the  Preferred  Securities. The  Representatives have  advised COMSAT  that they
intend to make  a market in  the Preferred Securities  prior to commencement  of
trading  on the New York Stock Exchange, but  are not obligated to do so and may
discontinue any such market making at any time without notice.

    COMSAT  Capital  I  and  COMSAT   have  agreed  to  indemnify  the   several
Underwriters  against  certain  liabilities,  including  liabilities  under  the
Securities Act.

    Certain of the Underwriters  engage in transactions with,  and from time  to
time  have performed services  for, COMSAT and its  subsidiaries in the ordinary
course of business.

                                    EXPERTS

    The consolidated financial  statements and the  related financial  statement
schedules  incorporated  in this  Prospectus by  reference from  COMSAT's Annual
Report on Form 10-K for the year  ended December 31, 1994, have been audited  by
Deloitte  & Touche LLP,  independent auditors, as stated  in their report (which
includes an  explanatory paragraph  referring to  the change  in its  method  of
accounting  for income  taxes), which is  incorporated herein  by reference, and
have been so incorporated in  reliance upon the report  of such firm given  upon
their authority as experts in accounting and auditing.

                           VALIDITY OF THE SECURITIES

   
    The  validity  of  the Preferred  Securities,  the validity  of  the Limited
Partnership Agreement and  the formation of  COMSAT Capital I  are being  passed
upon  by Crowell & Moring,  special counsel to COMSAT  and COMSAT Capital I. The
validity of the Guarantee and the Junior Subordinated Debentures will be  passed
upon  on behalf of  COMSAT Capital I and  COMSAT by Warren  Y. Zeger, Esq., Vice
President, General Counsel  and Secretary of  COMSAT. As of  June 29, 1995,  Mr.
Zeger  was the record owner  of 18,056 shares of  COMSAT's common stock ("Common
Stock") and had  options to purchase  162,819 shares of  Common Stock, of  which
options  to  purchase  57,819  shares  were  exercisable.  The  validity  of the
Preferred Securities, the Guarantee and the Junior Subordinated Debentures  will
be  passed upon for  the Underwriters by  Sullivan & Cromwell.  Statements as to
United States taxation  in this  Prospectus in  the second  paragraph under  the
caption  "Risk Factors  -- Tax Event  or Investment Company  Event Redemption or
Distribution", and under the caption "United States Taxation", have been  passed
upon for COMSAT and COMSAT Capital I by Crowell & Moring, special tax counsel to
COMSAT and COMSAT Capital I, and are stated herein on their authority.
    

                                       35
<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

    NO  PERSON  HAS BEEN  AUTHORIZED  TO GIVE  ANY  INFORMATION OR  TO  MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN  THIS PROSPECTUS AND, IF GIVEN  OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED.  THIS  PROSPECTUS  DOES  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN  OFFER TO  BUY ANY SECURITIES  OTHER THAN  THE SECURITIES  TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY SUCH
SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS UNLAWFUL.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY  CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE  HAS BEEN NO CHANGE IN THE
AFFAIRS OF  COMSAT  OR COMSAT  CAPITAL  I SINCE  THE  DATE HEREOF  OR  THAT  THE
INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.

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

                               TABLE OF CONTENTS

   
<TABLE>
<CAPTION>
                                                    PAGE
                                                    -----
<S>                                              <C>
Available Information..........................           3
Incorporation of Certain Documents by
 Reference.....................................           3
For Florida Residents Only.....................           4
COMSAT Capital I...............................           4
COMSAT Corporation.............................           4
Risk Factors...................................           6
Summary Financial Information of COMSAT........           8
Ratio of Earnings to Fixed Charges of COMSAT...           9
Use of Proceeds................................           9
Capitalization of COMSAT.......................           9
Description of the Preferred Securities........          10
Description of the Guarantee...................          19
Description of the Junior Subordinated
 Debentures....................................          22
Effect of Obligations Under the Junior
 Subordinated Debentures and the Guarantee.....          29
United States Taxation.........................          29
Underwriting...................................          34
Experts........................................          35
Validity of the Securities.....................          35
</TABLE>
    

   
                         8,000,000 PREFERRED SECURITIES
    

                                COMSAT CAPITAL I

                                   % CUMULATIVE
                                 MONTHLY INCOME
                              PREFERRED SECURITIES
                            GUARANTEED TO THE EXTENT
                              SET FORTH HEREIN BY

                [LOGO]

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

                                   PROSPECTUS

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

                              GOLDMAN, SACHS & CO.

                               SMITH BARNEY INC.

                                CS FIRST BOSTON

   
                            PAINEWEBBER INCORPORATED
    

                      REPRESENTATIVES OF THE UNDERWRITERS

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

    The  following  table  sets  forth the  estimated  expenses  payable  by the
registrants  with  respect  to  the  offering  described  in  this  Registration
Statement:

   
<TABLE>
<S>                                                                <C>
Securities and Exchange Commission registration fee..............  $  68,966
NYSE fees........................................................     58,000*
Organization fees................................................      1,000*
Trustee's fees and expenses......................................      8,000*
Printing and engraving...........................................     60,000*
Legal fees and expenses..........................................    250,000*
Accounting fees and expenses.....................................     25,000*
Rating Agency fees...............................................     56,000*
Blue sky fees and expenses (including legal).....................     22,000*
Miscellaneous fees and expenses..................................     31,034*
                                                                   ---------
Total............................................................  $ 580,000*
                                                                   ---------
                                                                   ---------
<FN>
- --------------
*Estimated.
</TABLE>
    

ITEM 16.  EXHIBITS.

    The exhibits listed below are listed according to the number assigned in the
table in Item 601 of Regulation S-K.

   
<TABLE>
<CAPTION>
 EXHIBIT NO.                                             DESCRIPTION OF EXHIBIT
- --------------  --------------------------------------------------------------------------------------------------------
<C>             <S>
         1      Form of Underwriting Agreement.
         4(a)   Articles of Incorporation of COMSAT Corporation (composite copy; as amended through June 1, 1993)
                 (Incorporated by reference to Exhibit 4(a) to COMSAT Corporation's Registration Statement on Form S-3,
                 Commission File No. 33-51661).
         4(b)   By-laws of COMSAT Corporation (as amended through January 17, 1995) (Incorporated by reference to
                 Exhibit 3(b) to COMSAT Corporation's Annual Report on Form 10-K for the year ended December 31, 1994).
         4(c)   Form of Indenture between COMSAT Corporation and The First National Bank of Chicago, as Trustee.
         4(d)   Form of Amended and Restated Limited Partnership Agreement of COMSAT Capital I, L.P.
         4(e)   Certificate of Limited Partnership of COMSAT Capital I, L.P. (previously filed as Exhibit 4(f)).*
         4(f)   Form of Junior Subordinated Debenture (See Exhibit 4(c)).
         4(g)   Form of Preferred Security (See Exhibit 4(d)).
         4(h)   Form of Guarantee Agreement.
         5(a)   Opinion of Warren Y. Zeger, Vice President, General Counsel and Secretary of COMSAT Corporation, as to
                 the legality of certain securities to which this Registration Statement relates.
         5(b)   Opinion of Crowell & Moring as to the legality of certain securities to which this Registration
                 Statement relates.
         8      Opinion of Crowell & Moring, special tax counsel to the registrants, with respect to tax matters.
</TABLE>
    

                                      II-1
<PAGE>
   
<TABLE>
<CAPTION>
 EXHIBIT NO.                                             DESCRIPTION OF EXHIBIT
- --------------  --------------------------------------------------------------------------------------------------------
<C>             <S>
        12      Statement re Ratio of Earnings to Fixed Charges.
        23(a)   Consent of Deloitte & Touche LLP.
        23(b)   Consent of Warren Y. Zeger (contained in Exhibit 5(a)).
        23(c)   Consent of Crowell & Moring (contained in Exhibit 5(b)).
        23(d)   Consent of Crowell & Moring (contained in Exhibit 8).
        24      Powers of Attorney.*
        25      Statement on Form T-1 of eligibility and qualification of The First National Bank of Chicago under the
                 Trust Indenture Act of 1939.
        99      Communications Satellite Act of 1962, as amended (Incorporated by reference to Exhibit 28(c) to COMSAT
                 Corporation's Registration Statement on Form S-4, Commission File No. 33-9966).
<FN>
- --------------
* Previously filed.
</TABLE>
    

                                      II-2
<PAGE>
                                   SIGNATURES

   
    Pursuant  to  the  requirements  of  the  Securities  Act  of  1933,  COMSAT
Corporation certifies that it  has reasonable grounds to  believe that it  meets
all  of  the  requirements for  filing  on Form  S-3  and has  duly  caused this
Amendment No. 1  to Registration Statement  to be  signed on its  behalf by  the
undersigned,  thereunto duly authorized,  in the County  of Montgomery, State of
Maryland, on the 7th day of July, 1995.
    

                                          COMSAT Corporation
                                          (Registrant)

   
                                          By   /s/ ROBERT N. DAVIS, JR.
    

                                            ------------------------------------
   
                                                  (Robert N. Davis, Jr.,
                                                 Assistant General Counsel)
    

   
    Pursuant to the requirements of the  Securities Act of 1933, this  Amendment
No.  1 to Registration Statement has been signed by the following persons in the
capacities indicated and by power of attorney on July 7, 1995.
    

                                          (1)  Principal executive officer

                                                /s/ BRUCE L. CROCKETT*
                                              ----------------------------------
                                                  (Bruce L. Crockett,
                                                 President and Chief Executive
                                              Officer)

                                          (2)  Principal financial and
                                               accounting officer

                                                /s/ ALLEN E. FLOWER*
                                              ----------------------------------
                                                  (Allen E. Flower, Acting
                                                 Chief Financial Officer and
                                              Controller)

                                          (3)  Board of Directors

                                                /s/ LUCY WILSON BENSON*
                                              ----------------------------------
                                                  (Lucy Wilson Benson, Director)

                                                /s/ EDWIN I. COLODNY*
                                              ----------------------------------
                                                  (Edwin I. Colodny, Director)

                                                /s/ BRUCE L. CROCKETT*
                                              ----------------------------------
                                                  (Bruce L. Crockett, Director)

                                                /s/ LAWRENCE S. EAGLEBURGER*
                                              ----------------------------------
                                                  (Lawrence S. Eagleburger,
                                               Director)

                                      II-3
<PAGE>
                                                /s/ NEAL B. FREEMAN*
                                               ---------------------------------
                                                  (Neal B. Freeman, Director)

                                                /s/ BARRY M. GOLDWATER*
                                              ----------------------------------
                                                  (Barry M. Goldwater, Director)

                                                /s/ ARTHUR HAUSPURG*
                                              ----------------------------------
                                                  (Arthur Hauspurg, Director)

                                                /s/ PETER S. KNIGHT*
                                              ----------------------------------
                                                  (Peter S. Knight, Director)

                                                /s/ MELVIN R. LAIRD*
                                              ----------------------------------
                                                  (Melvin R. Laird,
                                                  Chairman of the Board and
                                               Director)

                                                /s/ PETER W. LIKINS*
                                              ----------------------------------
                                                  (Peter W. Likins, Director)

                                              ----------------------------------
                                                  (Howard M. Love, Director)

                                                /s/ CHARLES T. MANATT*
                                              ----------------------------------
                                                  (Charles T. Manatt, Director)

                                                /s/ ROBERT G. SCHWARTZ*
                                              ----------------------------------
                                                  (Robert G. Schwartz, Director)

                                                /s/ C. J. SILAS*
                                              ----------------------------------
                                                  (C. J. Silas, Director)

                                                /s/ DOLORES D. WHARTON*
                                              ----------------------------------
                                                  (Dolores D. Wharton, Director)

   
*By: /s/ ROBERT N. DAVIS, JR.
    
    ----------------------------------
   
        (Robert N. Davis, Jr.,
     Attorney-in-fact)
    

                                      II-4
<PAGE>
   
    Pursuant to the requirements of the  Securities Act of 1933, COMSAT  Capital
I, L.P. certifies that it has reasonable grounds to believe that it meets all of
the requirements for filing on Form S-3 and has duly caused this Amendment No. 1
to  Registration  Statement  to be  signed  on  its behalf  by  the undersigned,
thereunto duly authorized, in  the County of Montgomery,  State of Maryland,  on
the 7th day of July, 1995.
    

                                          COMSAT Capital I, L.P.
                                          (Registrant)
                                          By: COMSAT Corporation, General
                                          Partner

   
                                          By:   /s/ ROBERT N. DAVIS, JR.
    

                                             -----------------------------------
   
                                                   (Robert N. Davis, Jr.,
                                                  Assistant General Counsel)
    

                                      II-5

<PAGE>

                                                           Draft of July 6, 1995


                             COMSAT CAPITAL I, L.P.

               ___% CUMULATIVE MONTHLY INCOME PREFERRED SECURITIES
                    (LIQUIDATION PREFERENCE $25 PER SECURITY)
                                  GUARANTEED BY

                               COMSAT CORPORATION

                                    _________

                             UNDERWRITING AGREEMENT



                                                                          , 1995

Goldman, Sachs & Co.,
Smith Barney Inc.,
CS First Boston Corporation,
PaineWebber Incorporated,
 As representatives of the several Underwriters
   named in Schedule I hereto,
c/o Goldman, Sachs & Co.,
85 Broad Street,
New York, New York 10004.

Ladies and Gentlemen:
     COMSAT Capital I, L.P., a Delaware limited partnership (the "Company"), and
COMSAT Corporation, a District of Columbia corporation, as general partner in
the Company and as guarantor (the "Guarantor" or "COMSAT"), propose, subject to
the terms and conditions stated herein, that the Company issue and sell to the
Underwriters named in Schedule I hereto (the "Underwriters") an aggregate of
8,000,000 of the Company's _____% Cumulative Monthly Income Preferred Securities
(liquidation preference $25 per security) representing limited partnership
interests (the "Preferred Securities"), such Preferred Securities guaranteed as
to the payment of accumulated and unpaid dividends and as to payments on
liquidation or redemption pursuant to, and to the extent provided in, a
Guarantee Agreement, to be dated as of July __, 1995 (the "Guarantee" and,
together with the Preferred Securities, the "Securities"), by the Guarantor.

     1.  Each of the Company and the Guarantor, jointly and severally,
represents and warrants to, and agrees with, each of the Underwriters that:

     (a)  A registration statement on Form S-3 (File No. 33-59841) in respect of
the Preferred Securities, the Guarantee and __% Junior Subordinated Deferrable
Interest Debentures of COMSAT (the "Subordinated Debentures" and, together with
the Preferred Securities and the Guarantee, the

<PAGE>

"Registered Securities"), entitled to the benefits of an indenture, dated as of
July __, 1995, as amended or supplemented (in the form filed as an exhibit to
the Registration Statement referred to below, the "Indenture"), between COMSAT
and The First National Bank of Chicago, as trustee (the "Trustee"), has been
filed with the Securities and Exchange Commission (the "Commission"); such
registration statement and any post-effective amendment thereto, each in the
form heretofore delivered to you, and, excluding exhibits thereto but including
all documents incorporated by reference in either prospectus contained therein,
to you for each of the other Underwriters, have been declared effective by the
Commission in such form; no other document (other than one or more requests for
acceleration of the effectiveness of the registration statement, each of which
has been reviewed by you) with respect to such registration statement or
document incorporated by reference therein has heretofore been filed or
transmitted for filing with the Commission; and no stop order suspending the
effectiveness of such registration statement has been issued and no proceeding
for that purpose has been initiated or threatened by the Commission (any
preliminary prospectus relating to the Preferred Securities included in such
registration statement or filed with the Commission pursuant to Rule 424(a) of
the rules and regulations of the Commission under the Securities Act of 1933, as
amended (the "Act"), is hereinafter called a "Preliminary Prospectus"; the
various parts of such registration statement, including all exhibits thereto and
including (i) the information contained in the form of final prospectus relating
to the Preferred Securities filed with the Commission pursuant to Rule 424(b)
under the Act in accordance with Section 5(a) hereof and deemed by virtue of
Rule 430A under the Act to be part of the registration statement at the time it
was declared effective and (ii) the documents incorporated by reference in
either prospectus contained in the registration statement at the time such part
of the registration statement became effective, each as amended at the time such
part of the registration statement became effective, is hereinafter collectively
called the "Registration Statement"; such final prospectus relating to the
Preferred Securities, in the form first filed pursuant to Rule 424(b) under the
Act, is hereinafter called the "Prospectus"; any reference herein to any
Preliminary Prospectus or the Prospectus shall be deemed to refer to and include
the documents incorporated by reference therein pursuant to Item 12 of Form S-3
under the Act, as of the date of such Preliminary Prospectus or Prospectus, as
the case may be; any reference to any amendment or supplement to any Preliminary
Prospectus or the Prospectus shall be deemed to refer to and include any
documents filed after the date of such Preliminary Prospectus or Prospectus, as
the case may be, under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), and incorporated by reference in such Preliminary Prospectus or
Prospectus, as the case may be; and any reference to any amendment to the
Registration Statement shall be deemed to refer to and include any annual report
of the Guarantor filed pursuant to Section 13(a) or 15(d) of the Exchange Act
after the effective date of the Registration Statement that is incorporated by
reference in the Registration Statement);

     (b)  No order preventing or suspending the use of any Preliminary
Prospectus has been issued by the Commission, and each Preliminary Prospectus,
at the time of filing thereof, conformed in all material respects to the
requirements of the Act and the rules and regulations of the Commission
thereunder, and did 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 the light of the circumstances under which they were
made, not misleading; PROVIDED, HOWEVER, that this representation and warranty
shall not apply to any statements or omissions made in reliance upon and in
conformity with information furnished in writing to the Company or the Guarantor
by an Underwriter through Goldman, Sachs & Co. expressly for use therein;

     (c)  The documents incorporated by reference in the Prospectus, when they
became effective or were filed with the Commission, as the case may be,
conformed in all material respects to the requirements of the Act or the
Exchange Act, as applicable, and the rules and regulations of the



                                         -2-

<PAGE>

Commission thereunder, and none of such documents contained an untrue statement
of a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading; and any
further documents so filed and incorporated by reference in the Prospectus or
any further amendment or supplement thereto, when such documents become
effective or are filed with the Commission, as the case may be, will conform in
all material respects to the requirements of the Act or the Exchange Act, as
applicable, and the rules and regulations of the Commission thereunder and 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
not misleading; PROVIDED, HOWEVER, that this representation and warranty shall
not apply to any statements or omissions made in reliance upon and in conformity
with information furnished in writing to the Company or the Guarantor by an
Underwriter through Goldman, Sachs & Co. expressly for use therein;

     (d)  The Registration Statement conforms, and the Prospectus and any
further amendments or supplements to the Registration Statement or the
Prospectus will conform, in all material respects to the requirements of the Act
and the Trust Indenture Act of 1939, as amended (the "Trust Indenture Act"), and
the rules and regulations of the Commission thereunder and do not and will not,
as of the applicable effective date as to the Registration Statement and any
amendment thereto, and as of the applicable filing date as to the Prospectus and
any amendment or supplement thereto, 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; PROVIDED, HOWEVER, that this
representation and warranty shall not apply to any statements or omissions made
in reliance upon and in conformity with information furnished in writing to the
Company or the Guarantor by an Underwriter through Goldman, Sachs & Co.
expressly for use therein;

     (e)  Neither the Company nor the Guarantor (including all of the
Guarantor's subsidiaries taken as a whole) has sustained since the date of the
latest audited financial statements included or incorporated by reference in the
Prospectus any material loss or interference with its business from fire,
explosion, flood or other calamity, whether or not covered by insurance, or from
any labor dispute or court or governmental action, order or decree, otherwise
than as set forth or contemplated in the Prospectus; and, since the respective
dates as of which information is given in the Registration Statement and the
Prospectus, there has not been any change in the capital stock or long-term debt
of the Company or the Guarantor (including all of the Guarantor's subsidiaries
taken as a whole) in excess of _____ shares of common stock of the Guarantor or
$_____ in long-term debt of the Guarantor, or any material adverse change in or
affecting the business prospects, general affairs, management, financial
position, stockholders' equity or results of operations of the Company or the
Guarantor (including all of the Guarantor's subsidiaries taken as a whole),
otherwise than as set forth or contemplated in the Prospectus;

     (f)  The Guarantor has been duly incorporated and is validly existing as a
corporation in good standing under the laws of the District of Columbia, with
power and authority (corporate and other) to own its properties and conduct its
business as described in the Prospectus, and has been duly qualified as a
foreign corporation for the transaction of business and is in good standing
under the laws of each other jurisdiction in which it owns or leases material
properties, or conducts any business so as to require such qualification or is
subject to no material liability or disability by reason of the failure to be so
qualified in any such jurisdiction; and each of COMSAT Video Enterprises, Inc.
and COMSAT Entertainment Group, Inc. (collectively, the "Designated
Subsidiaries") has been duly incorporated and is validly existing as a
corporation in good standing under the laws of its jurisdiction of
incorporation; and the Guarantor has an authorized capitalization as set forth
in the Prospectus;


                                       -3-

<PAGE>

     (g)  The Company has been duly formed and is validly existing as a limited
partnership in good standing under the Delaware Revised Uniform Limited
Partnership Act, as amended (the "Partnership Act"); the Company is a limited
partnership as described in the Prospectus and has conducted and will conduct no
business other than the transactions contemplated by this Agreement and
described in the Prospectus; the Company is not a party to or bound by any
agreement or instrument other than the Agreement of Limited Partnership, dated
as of May 22, 1995, of the Company and this Agreement and at the Time of
Delivery (as defined in Section 4 hereof) the Company will not be a party to
or bound by any agreement or instrument other than the Amended and Restated
Agreement of Limited Partnership, to be dated as of _______, 1995, of the
Company (in the form included in the Registration Statement, the "Partnership
Agreement") and this Agreement; the Company has no liabilities or obligations
other than those arising out of the transactions contemplated by this Agreement
and described in the Prospectus; and the Company is not a party to or subject
to any action, suit or proceeding of any nature;

     (h)  Up to the date hereof, the Guarantor has been and is the sole general
partner in the Company and COMSAT SPV, Inc., a Delaware corporation and a wholly
owned subsidiary of COMSAT ("COMSAT SPV"), is the sole limited partner in the
Company.  At the Time of Delivery COMSAT will be the sole General Partner of the
Company, the holders of the Securities will become limited partners of the
Company and COMSAT SPV will withdraw as a limited partner; all of the issued
limited partnership interests of the Company other than the Preferred Securities
are owned by COMSAT free and clear of all liens, encumbrances or claims; and all
of the outstanding partnership interests of the Company and all of the issued
shares of capital stock of the Guarantor have been duly and validly authorized
and issued, are fully paid and (other than the general partnership interest in
the Company) non-assessable, and the limited partnership interests of the
Company conform to the descriptions thereof contained in the Prospectus;

     (i)  The Preferred Securities have been duly and validly authorized by the
Company, and, when issued and delivered against payment therefor as provided
herein, will be duly and validly issued and fully paid and non-assessable and
will conform to the description thereof contained in the Prospectus; the
Preferred Securities will have the rights set forth in the Partnership Agreement
and the terms of the Preferred Securities are valid and binding on the Company;

     (j)  The Guarantee, the Subordinated Debentures and the Indenture
(collectively, the "Guarantor Agreements") have each been duly authorized by the
Guarantor and when validly executed and delivered by the Guarantor and, in the
case of the Indenture, by the Trustee, and, with respect to the Subordinated
Debentures, validly authenticated, will constitute legal, valid and binding
obligations of the Guarantor enforceable in accordance with their respective
terms, subject, as to enforcement, to bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar laws of general applicability
relating to or affecting creditors' rights and to general equity principles and
considerations of public policy, the Partnership Agreement has been duly
authorized, validly executed and delivered by each of the Guarantor, the
Company and COMSAT SPV and constitutes a legal, valid and binding obligation
of each of the Guarantor, the Company and COMSAT SPV enforceable in accordance
with its terms, subject, as to enforcement, to bankruptcy, insolvency,
fraudulent transfer, reorganization, moratorium and similar laws of general
applicability relating to or affecting creditors' rights and to general equity
principles and considerations of public policy; the Subordinated Debentures
are entitled to the benefits provided by the Indenture; the Indenture has been
duly qualified under the Trust Indenture Act; and the Guarantor Agreements
and the Partnership Agreement conform to the descriptions thereof in the
Prospectus;


                                       -4-

<PAGE>

     (k)  The issue and sale of the Preferred Securities by the Company, the
purchase of the Subordinated Debentures by the Company, the compliance by the
Company with all of the provisions of the Partnership Agreement and this
Agreement and the consummation of the transactions herein and therein
contemplated will not conflict with or result in a breach of any of the terms or
provisions of, or constitute a default under, any agreement or instrument to
which the Company is a party or by which the Company is bound or to which any of
the property or assets of the Company is subject, nor will such action result in
any violation of the provisions of the Partnership Agreement or certificate of
limited partnership of the Company or any statute or any order, rule or
regulation of any court or governmental agency or body having jurisdiction over
the Company or any of its properties; and no consent, approval, authorization,
order, registration or qualification of or with any such court or governmental
agency or body is required for the issue and sale of the Preferred Securities by
the Company, the purchase of the Subordinated Debentures by the Company or the
consummation by the Company of the other transactions contemplated by this
Agreement, except the registration under the Act of the Registered Securities,
qualification of the Indenture under the Trust Indenture Act, registration of
the Preferred Securities under the Exchange Act, approval of the Federal
Communications Commission ("FCC") pursuant to the Communications Satellite Act
of 1962, as amended (the "Satellite Act"), listing of the Preferred Securities
on the New York Stock Exchange and such consents, approvals, authorizations,
registrations or qualifications as may be required under state securities or
Blue Sky laws in connection with the purchase of the Preferred Securities and
the distribution of the Preferred Securities by the Underwriters;

     (l)  The issue and sale of the Preferred Securities by the Company, the
issuance by COMSAT of the Guarantee, the issuance and sale by COMSAT of the
Subordinated Debentures, the compliance by the Company and the Guarantor with
all of the provisions of this Agreement, the execution, delivery and performance
by the Guarantor of the Guarantor Agreements and the Partnership Agreement,
and the consummation of the transactions herein and therein contemplated will
not conflict with or result in a breach or violation of any of the terms or
provisions of, or constitute a default under, any agreement or instrument to
which the Guarantor or any of the Designated Subsidiaries is a party or by
which the Guarantor or any of the Designated Subsidiaries is bound or to which
any property or assets of the Guarantor or any of the Designated Subsidiaries
is subject nor will such action result in any violation of the provisions of
the Articles of Incorporation, as amended, or by-laws of the Guarantor or any
statute or any order, rule or regulation or any court or governmental agency
or body having jurisdiction over the Guarantor or any of the Designated
Subsidiaries or any of their properties; and no consent, approval,
authorization, order, registration or qualification of or with any such
court or governmental agency or body is required for the issuance of the
Guarantee, the issuance and sale of the Subordinated Debentures or the
consummation by the Guarantor of the transactions contemplated by this
Agreement, except the registration under the Act of the Registered Securities,
qualification of the Indenture under the Trust Indenture Act, approval of the
FCC pursuant to the Satellite Act and such other consents, approvals,
authorizations, registrations or qualifications as may be required under state
securities or Blue Sky laws in connection with the purchase of the Preferred
Securities and distribution of the Preferred Securities by the Underwriters;

     (m)  Neither the Company, the Guarantor nor any of the Designated
Subsidiaries is in violation of its organizational documents or in default in
the performance or observance of any material obligation, agreement, covenant or
condition contained in any indenture, mortgage, deed of trust, loan agreement or
capital lease, or other material agreement the noncompliance with which


                                       -5-

<PAGE>

would adversely affect the ability of the Company or the Guarantor to carry out
its obligations hereunder, to which it is a party or by which it or any of its
properties may be bound;

     (n)  The statements set forth in the Prospectus under the captions
"Description of the Preferred Securities", "Description of the Guarantee",
"Description of the Junior Subordinated Debentures" and "Effect of Obligations
under the Junior Subordinated Debentures and the Guarantee", insofar as they
purport to constitute summaries of the terms of the securities therein
described, and under the caption "United States Taxation", insofar as they
purport to describe the provisions of the laws and documents referred to
therein, are accurate and complete in all material respects; and the statements
set forth in the Prospectus under the caption "Underwriting", insofar as they
purport to describe the provisions of the laws and documents referred to
therein, are accurate;

     (o)  Other than as set forth in the Prospectus, there are no legal or
governmental proceedings pending to which the Company, the Guarantor or any of
the Designated Subsidiaries is a party or of which any of their properties is
the subject which the Guarantor has reasonable cause to believe would
individually or in the aggregate have a material adverse effect on the current
or future consolidated financial position, stockholders' equity or results of
operations of the Company or the Guarantor (including all of the Guarantor's
subsidiaries taken as a whole); and, to the best of the Company's and the
Guarantor's knowledge, no such proceedings are threatened by governmental
authorities or threatened by others;

     (p)  Neither the Company nor the Guarantor is or, after giving effect to
the offering and sale of the Preferred Securities, will 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");

     (q)  Except as described in the Prospectus, neither the Company, the
Guarantor nor any of their affiliates does business with the government of Cuba
or with any person or affiliate located in Cuba within the meaning of Section
517.075, Florida Statutes;

     (r)  Deloitte & Touche LLP, who have certified certain financial statements
of the Company and the Guarantor, are independent public accountants as required
by the Act and the rules and regulations of the Commission thereunder;

     (s)  The Guarantor has reasonable cause to believe that (i) it owns or
possesses (either directly or through its subsidiaries) all material foreign and
domestic governmental licenses, permits, certificates, consents, orders,
approvals and other authorizations (collectively, "Governmental Licenses")
necessary to own or lease, as the case may be, and to operate its properties and
to carry on its business as presently conducted; (ii) all of the material
Governmental Licenses are valid and in full force and effect; (iii) neither the
Guarantor nor any of its subsidiaries has received any notice of proceedings
relating to revocation or modification of any such material Governmental
License; and (iv) no event has occurred which permits (nor has an event occurred
which with notice or lapse of time or both would permit) the revocation or
termination of any material Governmental License or which might result in any
other material impairment of the rights of the Guarantor or its subsidiaries
therein; and

     (t)  (i) The Registration Statement accurately describes in all material
respects the status of all FCC licenses, permits, consents, orders, approvals
and other FCC authorizations described therein; (ii) the Guarantor has
reasonable cause to believe that it has operated in compliance with the
Government Licenses, the Communications Act of 1934, as amended, and the
Satellite Act and the rules and regulations of the FCC promulgated thereunder,
and has reasonable cause to believe that it has made all filings,


                                       -6-

<PAGE>

reports, applications and submissions required thereunder, which filings,
reports, applications and submissions are true, complete and correct in all
material respects; and (iii) no FCC consent, approval, authorization or order
of, or any filing with, the FCC is required, other than such consents,
approvals, authorizations, orders or filings which have been obtained or made
and are in good standing and have not been revoked, in connection with the
authorization, issuance, transfer, sale or delivery of the Preferred Securities
by the Company or the transactions contemplated hereby.

     2.  Subject to the terms and conditions herein set forth, the Company and
the Guarantor agree to issue and sell to each of the Underwriters, and each of
the Underwriters agrees, severally and not jointly, to purchase, at a purchase
price per security of $25.00 the number of Preferred Securities set forth
opposite the name of such Underwriter in Schedule I hereto.

     As compensation to the Underwriters for their commitments hereunder, and in
view of the fact that the proceeds of the sale of the Preferred Securities will
be used by the Company to purchase the Subordinated Debentures of the Guarantor,
the Guarantor hereby agrees to pay at the Time of Delivery to Goldman, Sachs &
Co., for the accounts of the several Underwriters, an amount equal to
$.............. per security for the Preferred Securities to be delivered
hereunder at the Time of Delivery.

     3.  Upon the authorization by you of the release of the Preferred
Securities, the several Underwriters propose to offer the Preferred Securities
for sale upon the terms and conditions set forth in the Prospectus.

     4.     (a) The Preferred Securities to be purchased by each Underwriter
         hereunder will be represented by one or more definitive global
         Preferred Securities in book-entry form which will be deposited by or
         on behalf of the Company with The Depository Trust Company ("DTC") or
         its designated custodian, for the account of each Underwriter, against
         payment by or on behalf of such Underwriter of the purchase price
         therefor by certified or official bank check or checks, payable to the
         order of the Company in New York Clearing House (next day) funds.  The
         time and date of such delivery and payment shall be 9:30 a.m., New York
         time, on ...................., 1995 or such other time and date as
         Goldman, Sachs & Co. and the Company may agree upon in writing.  Such
         time and date for delivery of the Preferred Securities is herein called
         the "Time of Delivery".

           At the Time of Delivery, the Guarantor will pay, or cause to be paid,
         the commission payable at the Time of Delivery to the Underwriters
         under Section 2 hereof by certified or official bank check or checks,
         payable to the order of Goldman, Sachs & Co. in New York Clearing
         House (next day) funds.

           (b)  The documents to be delivered at the Time of Delivery by or on
         behalf of the parties hereto pursuant to Section 7 hereof, including
         the cross-receipt for the Securities and any additional documents
         requested by the Underwriters pursuant to Section 7(m) hereof and the
         check or checks specified in subsection (a) above, will be delivered
         at the offices of Sullivan & Cromwell, 125 Broad Street, New York, New
         York 10004 (the "Closing Location"), all at the Time of Delivery.  A
         meeting will be held at the Closing Location at ......... p.m., New
         York City time, on the New York Business Day next preceding the Time
         of Delivery, at which meeting the final drafts of the documents to be
         delivered pursuant to the preceding sentence will be available for
         review by the parties hereto.  For the purposes of this Section 4,
         "New York Business Day" shall mean each Monday, Tuesday, Wednesday,
         Thursday and Friday which is not a day on which banking institutions
         in New York are generally authorized or obligated by law or executive
         order to close.


                                       -7-

<PAGE>

     5.  Each of the Company and the Guarantor, jointly and severally, agrees
with each of the Underwriters:

        (a)   To prepare the Prospectus in a form approved by you and to file
     such Prospectus pursuant to Rule 424(b) under the Act not later than the
     Commission's close of business on the second business day following the
     execution and delivery of this Agreement, or, if applicable, such earlier
     time as may be required by Rule 430A(a)(3) under the Act; to make no
     further amendment or any supplement to the Registration Statement or
     Prospectus prior to the Time of Delivery which shall be disapproved by you
     promptly after reasonable notice thereof; to advise you, promptly after it
     receives notice thereof, of the time when any amendment to the Registration
     Statement has been filed or becomes effective or any supplement to the
     Prospectus or any amended Prospectus has been filed and to furnish you with
     copies thereof; to file promptly all reports and any definitive proxy or
     information statements required to be filed by the Guarantor with the
     Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange
     Act subsequent to the date of the Prospectus and for so long as the
     delivery of a prospectus is required in connection with the offering or
     sale of the Preferred Securities; to advise you, promptly after it receives
     notice thereof, of the issuance by the Commission of any stop order or of
     any order preventing or suspending the use of any Preliminary Prospectus or
     prospectus, of the suspension of the qualification of the Registered
     Securities for offering or sale in any jurisdiction, of the initiation or
     threatening of any proceeding for any such purpose, or of any request by
     the Commission for the amending or supplementing of the Registration
     Statement or Prospectus or for additional information; and, in the event of
     the issuance of any stop order or of any order preventing or suspending the
     use of any Preliminary Prospectus or prospectus or suspending any such
     qualification, promptly to use its best efforts to obtain the withdrawal of
     such order;

        (b)   Promptly from time to time to take such action as you may
     reasonably request to qualify the Registered Securities for offering and
     sale under the securities laws of such jurisdictions as you may request and
     to comply with such laws so as to permit the continuance of sales and
     dealings therein in such jurisdictions for as long as may be necessary to
     complete the distribution of the Preferred Securities, provided that in
     connection therewith neither the Company nor the Guarantor shall be
     required to qualify as a foreign corporation or to file a general consent
     to service of process in any jurisdiction;

        (c)   Prior to 12:00 noon, New York City time, on the New York Business
     Day next succeeding the date of this Agreement, to furnish the Underwriters
     with copies of the Prospectus in New York City in such quantities as you
     may reasonably request, and, if the delivery of a prospectus is required at
     any time prior to the expiration of nine months after the time of issue of
     the Prospectus in connection with the offering or sale of the Registered
     Securities and if at such time any event shall have occurred as a result of
     which the Prospectus as then amended or supplemented would include an
     untrue statement of a material fact or omit to state any material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made when such Prospectus is delivered,
     not misleading, or, if for any other reason it shall be necessary during
     such period to amend or supplement the Prospectus or to file under the
     Exchange Act any document incorporated by reference in the Prospectus in
     order to comply with the Act, the Exchange Act or the Trust Indenture Act,
     to notify you and upon your request to file such document and to prepare
     and furnish without charge to each Underwriter and to any dealer in
     securities as many copies as you may from time to time reasonably request
     of an amended Prospectus or a supplement to the Prospectus which will
     correct such statement or omission


                                       -8-

<PAGE>

     or effect such compliance, and in case any Underwriter is required to
     deliver a prospectus in connection with sales of any of the Registered
     Securities at any time nine months or more after the time of issue of the
     Prospectus, upon your request but at the expense of such Underwriter, to
     prepare and deliver to such Underwriter as many copies as you may request
     of an amended or supplemented Prospectus complying with Section 10(a)(3) of
     the Act;

        (d)   In the case of the Guarantor, to make generally available to its
     securityholders as soon as practicable, but in any event not later than
     eighteen months after the effective date of the Registration Statement (as
     defined in Rule 158(c) under the Act), an earnings statement of the
     Guarantor and its subsidiaries (which need not be audited) complying with
     Section 11(a) of the Act and the rules and regulations thereunder
     (including, at the option of the Guarantor, Rule 158);

        (e)   During the period beginning from the date hereof and continuing to
     and including the date 90 days after the date of the Prospectus, not to
     offer, sell, contract to sell or otherwise dispose of, except as provided
     hereunder, (i) any limited partnership interests or other securities of the
     Company, (ii) any preferred stock or any other securities of COMSAT which
     are substantially similar to the Preferred Securities including the
     Guarantee, or to the Subordinated Debentures, or (iii) any other securities
     which are convertible into, or exercisable or exchangeable for, limited
     partnership interests in or other securities of the Company, or preferred
     stock or such substantially similar securities of COMSAT, without your
     prior written consent;

        (f)   To the extent necessary to comply with the rules and regulations
     of the New York Stock Exchange (the "Exchange") or any other exchange on
     which the Preferred Securities are listed, to furnish to the holders of the
     Preferred Securities as soon as practicable after the end of each fiscal
     year an annual report of the Guarantor (which shall include a balance sheet
     and statements of income, stockholders' equity and cash flows of the
     Guarantor and its consolidated subsidiaries certified by independent public
     accountants) and, as soon as practicable after the end of each of the first
     three quarters of each fiscal year (beginning with the fiscal quarter
     ending after the effective date of the Registration Statement),
     consolidated summary financial information of the Guarantor and its
     subsidiaries for such quarter in reasonable detail;

        (g)   During a period of three years from the effective date of the
     Registration Statement, to furnish to you copies of all reports or other
     communications (financial or other) furnished to holders of common stock of
     the Guarantor, and to deliver to you (i) as soon as they are available,
     copies of any reports and financial statements furnished to or filed with
     the Commission or any national securities exchange on which any class of
     securities of the Company or the Guarantor is listed; and (ii) such
     additional information concerning the business and financial condition of
     the Company or the Guarantor as you may from time to time reasonably
     request (such financial statements to be on a consolidated basis to the
     extent the accounts of the Company, the Guarantor and the Guarantor's
     subsidiaries are consolidated in reports furnished to its stockholders
     generally or to the Commission);

        (h)   To use the net proceeds received by it from the sale of the
     Preferred Securities and the Subordinated Debentures pursuant to this
     Agreement in the manner specified in the Prospectus under the caption "Use
     of Proceeds"; and

        (i)   To use its best efforts to list, subject to notice of issuance,
     the Preferred Securities on the Exchange.


                                       -9-

<PAGE>

     6.  The Guarantor covenants and agrees with the several Underwriters that
it will pay or cause to be paid the following: (i) the fees, disbursements and
expenses of the Company's and the Guarantor's counsel and accountants in
connection with the registration of the Registered Securities under the Act and
all other expenses in connection with the preparation, printing and filing of
the Registration Statement, any Preliminary Prospectus and the Prospectus and
amendments and supplements thereto and the mailing and delivering of copies
thereof to the Underwriters and dealers; (ii) the cost of reproducing any
Agreement among Underwriters, this Agreement, the Indenture, the Partnership
Agreement, the Registered Securities, the Legal Investment and Blue Sky
Memoranda, closing documents (including any compilations thereof) and any other
documents in connection with the offering, purchase, sale and delivery of the
Preferred Securities and the Subordinated Debentures; (iii) all expenses in
connection with the qualification of the Registered Securities for offering and
sale under state securities laws as provided in Section 5(b) hereof, including
the fees and disbursements of counsel for the Underwriters in connection with
such qualification and in connection with the Legal Investment and Blue Sky
survey(s); (iv) any fees charged by securities rating services for rating the
Preferred Securities; (v) all fees and expenses in connection with listing any
of the Registered Securities on the Exchange and the cost of registering the
Preferred Securities under Section 12 of the Exchange Act; (vi) the filing fees
incident to, and the fees and disbursements of counsel for the Underwriters in
connection with, securing any required review by the National Association of
Securities Dealers, Inc. of the terms of the sale of the Preferred Securities;
(vii) the cost of qualifying the Preferred Securities with The Depositary Trust
Company; (viii) the cost of preparing certificates for the Preferred Securities,
if any; (ix) the cost and charges of any transfer agent or registrar; (x) the
fees and expenses of the Trustee and any agent of the Trustee and the fees and
disbursements of counsel for the Trustee in connection with the Indenture and
the Subordinated Debentures; and (xi) all other costs and expenses incident to
the performance of its obligations hereunder which are not otherwise
specifically provided for in this Section.  It is understood, however, that,
except as provided in this Section, and Sections 8 and 11 hereof, the
Underwriters will pay all of their own costs and expenses, including the fees of
their counsel, stock transfer taxes on resale of any of the Preferred Securities
by them, and any advertising expenses connected with any offers they may make.

     7.  The obligations of the Underwriters hereunder, as to the Preferred
Securities to be delivered at the Time of Delivery, shall be subject, in their
discretion, to the condition that all representations and warranties and other
statements of the Company and the Guarantor herein are, at and as of the Time of
Delivery, true and correct, the condition that the Company and the Guarantor
shall have performed all of their respective obligations hereunder theretofore
to be performed, and the following additional conditions:

        (a)   The Prospectus shall have been filed with the Commission pursuant
     to Rule 424(b) within the applicable time period prescribed for such filing
     by the rules and regulations under the Act and in accordance with Section
     5(a) hereof; no stop order suspending the effectiveness of the Registration
     Statement or any part thereof shall have been issued and no proceeding for
     that purpose shall have been initiated or threatened by the Commission; and
     all requests for additional information on the part of the Commission shall
     have been complied with to your reasonable satisfaction;

        (b)   Sullivan & Cromwell, counsel for the Underwriters, shall have
     furnished to you such opinion or opinions (a draft of each such opinion is
     attached as Annex II(a) hereto), dated the Time of Delivery, with respect
     to the incorporation of the Guarantor and the formation of the Company; the
     validity of the Registered Securities being delivered at the Time of
     Delivery; the Registration Statement and the Prospectus as well as such
     other related matters as you may


                                      -10-

<PAGE>

     reasonably request, and such counsel shall have received such papers and
     information as they may reasonably request to enable them to pass upon such
     matters;

        (c)   Crowell & Moring, special counsel for the Company and the
     Guarantor, shall have furnished to you their written opinion (a draft of
     each such opinion is attached as Annex II(b) hereto), dated the Time of
     Delivery, in form and substance satisfactory to you, to the effect that:

                (i)      The Company has been duly formed and is validly
           existing as a limited partnership in good standing under the
           Partnership Act; the Company is not a party to or bound by any
           agreement or instrument other than the Partnership Agreement and
           this Agreement and has the power and authority to consummate the
           transactions contemplated therein and herein;

               (ii)      To the best of such counsel's knowledge, there are no
           legal or governmental proceedings pending to which the Company is a
           party or of which any property of the Company is subject; and, to
           the best of such counsel's knowledge, no such proceedings are
           threatened by governmental authorities or threatened by others;

              (iii)      As of the date of the Time of Delivery the Guarantor is
           the sole General Partner of the Company and the holders of the
           Preferred Securities will be the sole limited partners and there are
           no other partners in the Company; all of the issued partnership
           interests of the Company have been duly and validly authorized and
           issued and are fully paid and (other than the general partnership
           interest in the Company) non-assessable and conform in all material
           respects to the descriptions thereof contained in the Prospectus;

               (iv)      This Agreement has been duly authorized, executed and
           delivered by the Company;

                (v)      The Partnership Agreement has been duly authorized,
           validly executed and delivered by the Company and constitutes a
           legal, valid and binding obligation of the Company, enforceable in
           accordance with its terms, subject, as to enforcement to bankruptcy,
           insolvency, fraudulent transfer, reorganization, moratorium and
           similar laws of general applicability relating to or affecting
           creditors' rights generally and to general equity principles and
           considerations of public policy;

               (vi)      The Preferred Securities have been duly and validly
           authorized by the Company, and, when issued and delivered against
           payment therefor as provided herein, will be duly and validly issued
           and fully paid and non-assessable and will conform to the
           description thereof contained in the Prospectus; the Preferred
           Securities have the rights set forth in the Partnership Agreement
           and the terms of the Preferred Securities are valid and binding on
           the Company;

              (vii)      The issue and sale by the Company of the Preferred
           Securities being delivered at the Time of Delivery and the
           compliance by the Company with all of the provisions of this
           Agreement, the purchase by the Company of the Subordinated
           Debentures, and the execution, delivery and performance by the
           Company of the Partnership Agreement and the consummation of the
           transactions herein and therein contemplated will not conflict with
           or result in a breach or violation of any of the terms or provisions
           of, or constitute a default under, any indenture, mortgage, deed of
           trust, loan agreement or other agreement or


                                      -11-

<PAGE>

           instrument known to such counsel to which the Company is a party or
           by which the Company is bound or to which any of the property or
           assets of the Company is subject, nor will such action result in any
           violation of the provisions of the Partnership Agreement or
           certificate of limited partnership of the Company or any statute or
           any order, rule or regulation known to such counsel of any court or
           governmental agency or body having jurisdiction over the Company or
           any of its properties;

             (viii)      No consent, approval, authorization, order,
           registration or qualification of or with any such court or
           governmental agency or body is required for the issue and sale of
           the Preferred Securities or the consummation by the Company of the
           transactions contemplated by this Agreement, except the registration
           under the Act of the Registered Securities, qualification of the
           Indenture under the Trust Indenture Act, registration of the
           Preferred Securities under the Exchange Act, approval of the FCC
           pursuant to the Satellite Act, listing of the Preferred Securities
           on the Exchange, each of which has been made or obtained, and such
           consents, approvals, authorizations, registrations or qualifications
           as have been obtained or may be required under state securities or
           Blue Sky laws in connection with the purchase and distribution of
           the Preferred Securities by the Underwriters;

               (ix)      The statements set forth in the Prospectus under the
           caption "United States Taxation", insofar as they purport to
           describe the provisions of the laws and documents referred to
           therein, are accurate and complete in all material respects; and

                (x)      Neither the Guarantor nor the Company is an "investment
           company" or an entity "controlled" by an "investment company" as
           such terms are defined in the Investment Company Act;

        (d)   Warren Y. Zeger, General Counsel of the Guarantor, or other
     counsel satisfactory to you, shall have furnished to you his written
     opinion (a draft of each such opinion is attached as Annex II(c) hereto),
     dated the Time of Delivery, in form and substance satisfactory to you, to
     the effect that:

                (i)      The Guarantor has been duly incorporated and is validly
           existing as a corporation in good standing under the laws of the
           District of Columbia with all corporate power and authority to own
           its properties and conduct its business as described in the
           Prospectus;

               (ii)      The Guarantor has been duly qualified as a foreign
           corporation for the transaction of business and is in good standing
           under the laws of each other jurisdiction in which it owns or leases
           material properties or conducts any business so as to require such
           qualification or is subject to no material liability or disability
           by reason of failure to be so qualified in any such jurisdiction
           (such counsel being entitled to rely in respect of the opinion in
           this clause upon opinions of local counsel and in respect of matters
           of fact upon certificates of officers of the Guarantor, provided
           that such counsel shall state that they believe that both you and
           they are justified in relying upon such opinions and certificates);

              (iii)      Each Designated Subsidiary of the Guarantor has been
           duly incorporated and is validly existing as a corporation in good
           standing under the laws of its jurisdiction of incorporation; and
           all of the issued shares of capital stock of each such subsidiary
           have been duly and validly authorized and issued, are fully paid and


                                      -12-

<PAGE>

           non-assessable, and (except for directors' qualifying shares and
           except as otherwise set forth in the Prospectus) are owned directly
           or indirectly by the Guarantor, free and clear of all liens,
           encumbrances or claims (such counsel being entitled to rely in
           respect of the opinion in this clause upon opinions of local
           counsel and in respect to matters of fact upon certificates of
           officers of the Guarantor or its subsidiaries, provided that such
           counsel shall state that they believe that both you and they are
           justified in relying upon such opinions and certificates);

               (iv)      To the best of such counsel's knowledge and other than
           as set forth in the Prospectus, there are no legal or governmental
           proceedings pending to which the Guarantor or any of the Designated
           Subsidiaries is a party or of which any property of the Guarantor or
           any of the Designated Subsidiaries is the subject which the Guarantor
           has reasonable cause to believe would individually or in the
           aggregate have a material adverse effect on the current or future
           consolidated financial position, stockholders' equity or results of
           operations of the Company or the Guarantor (including all of the
           Guarantor's subsidiaries taken as a whole); and, to the best of such
           counsel's knowledge, no such proceedings are threatened by
           governmental authorities or threatened by others;

                (v)      As of the date of the Time of Delivery, the Guarantor
           has an authorized capitalization as set forth in the Prospectus; and
           all of the issued partnership interests of the Company, other than
           the Preferred Securities, are owned directly by the Guarantor, free
           and clear of all liens, encumbrances, equities or claims;

               (vi)      This Agreement has been duly authorized, executed and
           delivered by the Guarantor;

              (vii)      The Guarantor Agreements and the Partnership Agreement
           have been duly authorized, executed and delivered by the Guarantor
           and constitute legal, valid and binding obligations of the Guarantor
           (assuming, with respect to the Subordinated Debentures, valid
           authentication), enforceable in accordance with their terms,
           subject, as to enforcement, to bankruptcy, insolvency, fraudulent
           transfer, reorganization, moratorium and similar laws of general
           applicability relating to or affecting creditors' rights and to
           general equity principles and considerations of public policy;
           the Subordinated Debentures are entitled to the benefits provided
           by the Indenture; the Indenture has been duly qualified under the
           Trust Indenture Act; and the Guarantor Agreements and the
           Partnership Agreement conform in all material respects to the
           descriptions thereof in the Prospectus;

             (viii)      The issue and sale of the Preferred Securities by the
           Company, the issuance by COMSAT of the Guarantee, the issuance by
           COMSAT of the Subordinated Debentures, the compliance by the
           Guarantor with all of the provisions of this Agreement, the
           execution, delivery and performance by the Guarantor of the
           Guarantor Agreements and the Partnership Agreement and the
           consummation of the transactions herein and therein contemplated
           will not conflict with or result in a breach of any of the terms or
           provisions of, or constitute a default under, any indenture,
           mortgage, deed of trust, loan agreement or capital lease, or other
           material agreement the noncompliance with which would adversely
           affect the ability of the Company or the Guarantor to carry out its
           obligations hereunder, known to such counsel to which the Guarantor
           or any of the Designated Subsidiaries is a party or by which the
           Guarantor or any of the Designated Subsidiaries is bound or to which


                                      -13-

<PAGE>

           any of the property or assets of the Guarantor or any of the
           Designated Subsidiaries is subject, nor will such action result in
           any violation of the provision of the Articles of Incorporation, as
           amended, or by-laws of the Guarantor or any statute or any order,
           rule or regulation known to such counsel of any court or
           governmental agency or body having jurisdiction over the Guarantor,
           any of the Designated Subsidiaries or any of their properties;

               (ix)      No consent, approval, authorization, order,
           registration or qualification of or with any such court or
           governmental agency or body is required for the issuance of the
           Guarantee, the issuance and sale of the Subordinated Debentures, the
           execution and delivery of the Guarantor Agreements and the
           Partnership Agreement and the consummation by the Guarantor of
           the transactions contemplated herein and therein, except the
           registration under the Act of the Registered Securities and
           qualification under the Trust Indenture Act and the approval of
           the FCC pursuant to the Satellite Act, which each have been
           obtained or made, and such consents, approvals, authorizations,
           registrations or qualifications as have been obtained or may be
           required under state securities or Blue Sky laws in connection
           with the purchase of the Preferred Securities and the
           distribution of the Preferred Securities by the Underwriters;

                (x)      The statements set forth in the Prospectus under the
           captions "Description of the Preferred Securities", "Description of
           the Guarantee", "Description of the Junior Subordinated Debentures"
           and "Effect of Obligations under the Junior Subordinated Debentures
           and the Guarantee", insofar as they purport to constitute summaries
           of the terms of the securities and documents therein described, are
           accurate and complete in all material respects;

               (xi)      The documents incorporated by reference in the
           Prospectus or any further amendment or supplement thereto made by
           the Company or the Guarantor prior to the Time of Delivery (other
           than the financial statements, related schedules, other financial
           and statistical data and a Statement of Eligibility and
           Qualification under the Trust Indenture Act on Form T-1 of the
           Trustee (the "Form T-1") therein, as to which such counsel need
           express no opinion), when they became effective or were filed with
           the Commission, as the case may be, complied as to form in all
           material respects with the requirements of the Act or the Exchange
           Act, as applicable, and the rules and regulations of the Commission
           thereunder; and such counsel has no reason to believe that any of
           such documents, when such documents became effective or were so
           filed, as the case may be, contained, in the case of a registration
           statement which became effective under the Act, an untrue statement
           of a material fact or omitted to state a material fact required to
           be stated therein or necessary to make the statements therein not
           misleading, or, in the case of other documents which were filed
           under the Exchange Act with the Commission, an untrue statement of a
           material fact or omitted to state a material fact necessary in order
           to make the statements therein, in the light of the circumstances
           under which they were made when such documents were so filed, not
           misleading; and

              (xii)      The Registration Statement and the Prospectus and any
           further amendments and supplements thereto made by the Company or
           the Guarantor prior to the Time of Delivery (other than the
           financial statements, related schedules, other


                                      -14-

<PAGE>

           financial and statistical data and Form T-1 therein, as to which
           such counsel need express no opinion) comply as to form in all
           material respects with the requirements of the Act and the Trust
           Indenture Act and the rules and regulations thereunder; although
           such counsel does not assume any responsibility for the accuracy,
           completeness or fairness of the statements contained in the
           Registration Statement or the Prospectus, except for those referred
           to in the opinion in subsection (x) of this section 7(d), such
           counsel has no reason to believe that, as of its effective date, the
           Registration Statement or any further amendment thereto made by the
           Company or the Guarantor prior to the Time of Delivery (other than
           the financial statements, related schedules, other financial and
           statistical data and Form T-1 therein, as to which such counsel need
           express no opinion) contained an untrue statement of a material fact
           or omitted to state a material fact required to be stated therein or
           necessary to make the statements therein not misleading or that, as
           of its date, the Prospectus or any further amendment or supplement
           thereto made by the Company or the Guarantor prior to the Time of
           Delivery (other than the financial statements, related schedules,
           other financial and statistical data and Form T-1 therein, as to
           which such counsel need express no opinion) contained an untrue
           statement of a material fact or omitted to state a material fact
           necessary to make the statements therein, in light of the
           circumstances in which they were made, not misleading or that, as of
           the Time of Delivery, either the Registration Statement or the
           Prospectus or any further amendment or supplement thereto made by
           the Company or the Guarantor prior to the Time of Delivery (other
           than the financial statements, related schedules, other financial
           and statistical data and Form T-1 therein, as to which such counsel
           need express no opinion) contains an untrue statement of a material
           fact or omits to state a material fact necessary to make the
           statements therein, in the light of the circumstances under which
           they were made, not misleading; and such counsel does not know of
           any amendment to the Registration Statement required to be filed or
           of any contracts or other documents of a character required to be
           filed as an exhibit to the Registration Statement or required to be
           incorporated by reference into the Prospectus or required to be
           described in the Registration Statement or the Prospectus which are
           not filed or incorporated by reference or described as required;

        (e)  On the date of the Prospectus at a time prior to the execution of
     this Agreement, at 9:30 a.m., New York City time, on the effective date of
     any post-effective amendment to the Registration Statement filed subsequent
     to the date of this Agreement and also at the Time of Delivery, Deloitte &
     Touche LLP shall have furnished to you a letter or letters, dated the
     respective dates of delivery thereof, in form and substance satisfactory to
     you, to the effect set forth in Annex I hereto (the executed copy of the
     letter delivered prior to the execution of this Agreement is attached as
     Annex I(a) hereto and a draft of the form of letter to be delivered on the
     effective date of any post-effective amendment and as of the Time of
     Delivery and is attached as Annex 1(b) hereto);

        (f)  The Guarantor Agreements and the Partnership Agreement shall have
     been executed and delivered in a form reasonably acceptable to you;

        (g)  (i) Neither the Company nor the Guarantor (including all of the
     Guarantor's subsidiaries taken as a whole) shall have sustained since the
     date of the latest audited financial statements included or incorporated by
     reference in the Prospectus any loss or interference with its business from
     fire, explosion, flood or other calamity, whether or not covered by
     insurance, or from any labor dispute or court or governmental action, order
     or


                                      -15-

<PAGE>

     decree, otherwise than as set forth or contemplated in the Prospectus, and
     (ii) since the respective dates as of which information is given in the
     Prospectus there shall not have been any change in the capital stock or
     long-term debt of the Company or the Guarantor (including all of the
     Guarantor's subsidiaries taken as a whole), in excess of _____ shares of
     common stock of the Guarantor or $_____ in long-term debt of the Guarantor,
     or any change in or affecting the business prospects, general affairs,
     management, financial position, stockholders' equity or results of
     operations of the Company or the Guarantor (including all of the
     Guarantor's subsidiaries taken as a whole), otherwise than as set forth
     or contemplated in the Prospectus, the effect of which, in any such case
     described in Clause (i) or (ii), is in the judgment of the Representatives
     so material and adverse as to make it impracticable or inadvisable to
     proceed with the public offering or the delivery of the Preferred
     Securities being delivered at the Time of Delivery on the terms and
     in the manner contemplated in the Prospectus;

        (h)   On or after the date hereof there shall not have occurred any of
     the following: (i) a downgrading in the rating accorded the Guarantor's
     debt securities or preferred stock by any "nationally recognized
     statistical rating organization", as that term is defined by the Commission
     for purposes of Rule 436(g)(2) under the Act, (ii) a public announcement by
     any such organization referred to in clause (i) that it has under
     surveillance or review, with possible negative implications, its rating of
     any of the Guarantor's debt securities or preferred stock, (iii) a
     suspension or material limitation in trading in securities generally on the
     Exchange, (iv) a suspension or material limitation in trading in the
     Guarantor's securities on the Exchange; (v) a general moratorium on
     commercial banking activities declared by either Federal or New York State
     authorities; or (vi) the outbreak or escalation of hostilities involving
     the United States or the declaration by the United States of a national
     emergency or war, if the effect of any such event specified in this Clause
     (vi) in the judgment of the Representatives makes it impracticable or
     inadvisable to proceed with the public offering or the delivery of the
     Preferred Securities being delivered at the Time of Delivery on the terms
     and in the manner contemplated in the Prospectus;

        (i)   The Preferred Securities to be sold at the Time of Delivery shall
     have been duly listed, subject to notice of issuance, on the Exchange;

        (j)   The Company shall have complied with the provisions of Section
     5(c) hereof with respect to the furnishing of prospectuses on the New York
     Business Day next succeeding the date of this Agreement; and

        (k)   The Company and the Guarantor shall have furnished or caused to be
     furnished to you at the Time of Delivery certificates of officers of the
     Company and the Guarantor satisfactory to you as to the accuracy of the
     representations and warranties of the Company and the Guarantor herein at
     and as of the Time of Delivery, as to the performance by the Company and
     the Guarantor of all of their obligations hereunder to be performed at or
     prior to the Time of Delivery, as to the matters set forth in subsections
     (a) and (g) of this Section and as to such other matters as you may
     reasonably request.

     8.  (a)  The Company and the Guarantor, jointly and severally, will
indemnify and hold harmless each Underwriter against any losses, claims, damages
or liabilities, joint or several, to which such Underwriter may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in any
Preliminary Prospectus, the Registration Statement or the Prospectus, or any
amendment or supplement thereto, or arise out of or are based upon the omission
or alleged omission to state therein a material fact required to be


                                      -16-

<PAGE>

stated therein or necessary to make the statements therein not misleading, and
will reimburse each Underwriter for any legal or other expenses reasonably
incurred by such Underwriter in connection with investigating or defending any
such action or claim as such expenses are incurred; PROVIDED, HOWEVER, that
neither the Company nor the Guarantor shall be liable in any such case to the
extent that any such loss, claim, damage or liability arises out of or is based
upon an untrue statement or alleged untrue statement or omission or alleged
omission made in any Preliminary Prospectus, the Registration Statement or the
Prospectus or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company or the Guarantor by
any Underwriter through Goldman, Sachs & Co. expressly for use therein.

     (b)  Each Underwriter will indemnify and hold harmless the Company and the
Guarantor against any losses, claims, damages or liabilities to which the
Company and the Guarantor may become subject, under the Act or otherwise,
insofar as such losses, claims, damages or liabilities (or actions in respect
thereof) arise out of or are based upon an untrue statement or alleged untrue
statement of a material fact contained in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or any amendment or supplement
thereto, or arise out of or are based upon the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, in each case to the extent, but only to
the extent, that such untrue statement or alleged untrue statement or omission
or alleged omission was made in any Preliminary Prospectus, the Registration
Statement or the Prospectus or any such amendment or supplement in reliance upon
and in conformity with written information furnished to the Company by such
Underwriter through Goldman, Sachs & Co. expressly for use therein; and will
reimburse the Company and the Guarantor for any legal or other expenses
reasonably incurred by the Company and the Guarantor in connection with
investigating or defending any such action or claim as such expenses are
incurred.

     (c)  Promptly after receipt by an indemnified party under subsection (a) or
(b) above of notice of the commencement of any action, such indemnified party
shall, if a claim in respect thereof is to be made against such indemnifying
party under such subsection, notify such indemnifying party in writing of the
commencement thereof; but the omission so to notify the indemnifying party shall
not relieve it from any liability which it may have to any indemnified party
otherwise than under such subsection.  In case any such action shall be brought
against any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate
therein and, to the extent that it shall wish, jointly with any other
indemnifying party similarly notified, to assume the defense thereof, with
counsel satisfactory to such indemnified party (who shall not, except with the
consent of the indemnified party, be counsel to the indemnifying party), and,
after notice from the indemnifying party to such indemnified party of its
election so to assume the defense thereof, the indemnifying party shall not be
liable to such indemnified party under such subsection for any legal expenses of
other counsel or any other expenses, in each case subsequently incurred by such
indemnified party, in connection with the defense thereof other than reasonable
costs of investigation.  No indemnifying party shall, without the written
consent of the indemnified party, effect the settlement or compromise of, or
consent to the entry of any judgment with respect to, any pending or threatened
action or claim in respect of which indemnification or contribution may be
sought hereunder (whether or not the indemnified party is an actual or potential
party to such action or claim) unless such settlement, compromise or judgment
(i) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (ii) does not include a
statement as to, or an admission of, fault, culpability or a failure to act, by
or on behalf of any indemnified party.


                                      -17-

<PAGE>

     (d)  If the indemnification provided for in this Section 8 is unavailable
to or insufficient to hold harmless an indemnified party under subsection (a) or
(b) above in respect of any losses, claims, damages or liabilities (or actions
in respect thereof) referred to therein, then each indemnifying party shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages or liabilities (or actions in respect thereof)
in such proportion as is appropriate to reflect the relative benefits received
by the Company and the Guarantor on the one hand and the Underwriters on the
other from the offering of the Preferred Securities.  If, however, the
allocation provided by the immediately preceding sentence is not permitted by
applicable law or if the indemnified party failed to give the notice required
under subsection (c) above, then each indemnifying party shall contribute to
such amount paid or payable by such indemnified party in such proportion as is
appropriate to reflect not only such relative benefits but also the relative
fault of the Company and the Guarantor on the one hand and the Underwriters on
the other in connection with the statements or omissions which resulted in such
losses, claims, damages or liabilities (or actions in respect thereof), as well
as any other relevant equitable considerations.  The relative benefits received
by the Company and the Guarantor on the one hand and the Underwriters on the
other shall be deemed to be in the same proportion as the total net proceeds
from the offering (before deducting expenses) received by the Company and the
Guarantor bear to the total underwriting discounts and commissions received by
the Underwriters, in each case as set forth in the table on the cover page of
the Prospectus.  The relative fault shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission or alleged omission to state a material fact relates to
information supplied by the Company and the Guarantor on the one hand or the
Underwriters on the other and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The Company, the Guarantor and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (d) were determined
by PRO RATA allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (d).  The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to above
in this subsection (d) shall be deemed to include any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim.  Notwithstanding the provisions of this
subsection (d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Preferred Securities
underwritten by it and distributed to the public were offered to the public
exceeds the amount of any damages which such Underwriter has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission.  No person guilty of fraudulent misrepresentation (within
the meaning of Section 11(f) of the Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation.  The
Underwriters' obligations in this subsection (d) to contribute are several in
proportion to their respective underwriting obligations and not joint.

     (e)  The obligations of the Company and the Guarantor under this Section 8
shall be in addition to any liability which the Company and the Guarantor may
otherwise have and shall extend, upon the same terms and conditions, to each
person, if any, who controls any Underwriter within the meaning of the Act; and
the obligations of the Underwriters under this Section 8 shall be in addition to
any liability which the respective Underwriters may otherwise have and shall
extend, upon the same terms and conditions, to each officer and director of the
Company or the Guarantor (including any person who, with his or her consent, is
named in the Registration Statement as about to become a director of the Company
or the Guarantor) and to each person, if any, who controls the Company or the
Guarantor within the meaning of the Act.


                                      -18-

<PAGE>

     9.  (a)  If any Underwriter shall default in its obligation to purchase the
Preferred Securities which it has agreed to purchase hereunder, you may in your
discretion arrange for you or another party or other parties to purchase such
Preferred Securities on the terms contained herein.  If within thirty-six hours
after such default by any Underwriter you do not arrange for the purchase of
such Preferred Securities, then the Company and the Guarantor shall be entitled
to a further period of thirty-six hours within which to procure another party or
other parties satisfactory to you to purchase such Preferred Securities on such
terms.  In the event that, within the respective prescribed periods, you notify
the Company and the Guarantor that you have so arranged for the purchase of such
Preferred Securities, or the Company or the Guarantor notifies you that it has
so arranged for the purchase of such Preferred Securities, you or the Company
shall have the right to postpone the Time of Delivery for a period of not more
than seven days, in order to effect whatever changes may thereby be made
necessary in the Registration Statement or the Prospectus, or in any other
documents or arrangements, and the Company and the Guarantor agree to file
promptly any amendments to the Registration Statement or the Prospectus which in
your opinion may thereby be made necessary.  The term "Underwriter" as used in
this Agreement shall include any person substituted under this Section with like
effect as if such person had originally been a party to this Agreement with
respect to such Preferred Securities.

     (b)  If, after giving effect to any arrangements for the purchase of the
Preferred Securities of a defaulting Underwriter or Underwriters by you or the
Company and the Guarantor as provided in subsection (a) above, the aggregate
number of such Preferred Securities which remains unpurchased does not exceed
one-eleventh of the aggregate number of all the Preferred Securities to be
purchased, then the Company and the Guarantor shall have the right to require
each non-defaulting Underwriter to purchase the number of Preferred Securities
which such Underwriter agreed to purchase hereunder, and, in addition, to
require each non-defaulting Underwriter to purchase its pro rata share (based on
the number of Preferred Securities which such Underwriter agreed to purchase
hereunder) of the Preferred Securities of such defaulting Underwriter or
Underwriters for which such arrangements have not been made; but nothing herein
shall relieve a defaulting Underwriter from liability for its default.

     (c)  If, after giving effect to any arrangements for the purchase of the
Preferred Securities of a defaulting Underwriter or Underwriters by you and the
Company and the Guarantor as provided in subsection (a) above, the aggregate
number of such Preferred Securities which remains unpurchased exceeds
one-eleventh of the aggregate number of all the Preferred Securities to be
purchased, the Company shall have the right to elect to consummate the sale of
the Preferred Securities, except as to any such unpurchased Preferred Securities
so remaining. If the Company and the Guarantor shall not exercise the right
described in subsection (b) above to require non-defaulting Underwriters to
purchase Preferred Securities of a defaulting Underwriter or Underwriters or the
right described in the preceding sentence, then this Agreement shall thereupon
terminate, without liability on the part of any non-defaulting Underwriter, the
Company or the Guarantor, except for the expenses to be borne by the Company and
the Guarantor and the Underwriters as provided in Section 6 hereof and the
indemnity and contribution agreements in Section 8 hereof; but nothing herein
shall relieve a defaulting Underwriter from liability for its default.

     10.  The respective indemnities, agreements, representations, warranties
and other statements of the Company and the Guarantor and the several
Underwriters, as set forth in this Agreement or made by or on behalf of them,
respectively, pursuant to this Agreement, shall remain in full force and effect,
regardless of any investigation (or any statement as to the results thereof)
made by or on behalf of any Underwriter or any controlling person of any
Underwriter, or the


                                      -19-

<PAGE>

Company or the Guarantor, or any officer or director or controlling person of
the Company or the Guarantor, and shall survive delivery of and payment for the
Preferred Securities.

     11.  If this Agreement shall be terminated pursuant to Section 9 hereof,
neither the Company nor the Guarantor shall then be under any liability to any
Underwriter except as provided in Sections 6 and 8 hereof; but, if for any other
reason, any Preferred Securities are not delivered by or on behalf of the
Company as provided herein, the Company or the Guarantor will reimburse the
Underwriters through you for all out-of-pocket expenses approved in writing by
you, including fees and disbursements of counsel, reasonably incurred by the
Underwriters in making preparations for the purchase, sale and delivery of the
Preferred Securities not so delivered, but the Company or the Guarantor shall
then be under no further liability to any Underwriter except as provided in
Sections 6 and 8 hereof.

     12.  In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you jointly or by Goldman, Sachs & Co. on behalf of you as the
representatives.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to you as the representatives in care of Goldman, Sachs &
Co., 85 Broad Street, New York, New York  10004, Attention: Registration
Department; and if to the Company or the Guarantor shall be delivered or sent by
mail to the address of the Guarantor set forth in the Registration Statement,
Attention: Secretary; provided, however, that any notice to an Underwriter
pursuant to Section 8(c) hereof shall be delivered or sent by mail, telex or
facsimile transmission to such Underwriter at its address set forth in its
Underwriters' Questionnaire, or telex constituting such Questionnaire, which
address will be supplied to the Company and the Guarantor by you upon request.
Any such statements, requests, notices or agreements shall take effect upon
receipt thereof.

     13.  This Agreement shall be binding upon, and inure solely to the benefit
of, the Underwriters, the Company, the Guarantor and, to the extent provided in
Sections 8 and 10 hereof, the officers and directors of the Company, the
Guarantor and each person who controls the Company, the Guarantor or any
Underwriter, and their respective heirs, executors, administrators, successors
and assigns, and no other person shall acquire or have any right under or by
virtue of this Agreement.  No purchaser of any of the Preferred Securities from
any Underwriter shall be deemed a successor or assign by reason merely of such
purchase.

     14.  Time shall be of the essence of this Agreement.  As used herein, the
term "business day" shall mean any day when the Commission's office in
Washington, D.C. is open for business.

     15.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK.

     16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.

     If the foregoing is in accordance with your understanding, please sign and
return to us six counterparts hereof, and upon the acceptance hereof by you, on
behalf of each of the Underwriters, this letter and such acceptance hereof shall
constitute a binding agreement between each of the Underwriters, the Company and
the Guarantor.  It is understood that your acceptance of this letter


                                      -20-

<PAGE>

on behalf of each of the Underwriters is pursuant to the authority set forth in
a form of Agreement among Underwriters, the form of which shall be submitted to
the Company for examination upon request, but without warranty on your part as
to the authority of the signers thereof.

                                        Very truly yours,

                                        COMSAT Capital I, L.P.

                                        By: COMSAT Corporation,
                                            as General Partner

                                        By: . . . . . . . . . . . .
                                           Name:
                                           Title:

                                        COMSAT Corporation

                                        By: . . . . . . . . . . . .
                                           Name:
                                           Title:

Accepted as of the date hereof:

Goldman, Sachs & Co.
Smith Barney Inc.
CS First Boston Corporation
PaineWebber Incorporated
By: . . . . . . . . . . . .
        (Goldman, Sachs & Co.)

  On behalf of each of the Underwriters


                                      -21-

<PAGE>

                                   SCHEDULE I


                                                              TOTAL NUMBER OF
                                                                 PREFERRED
                                                                SECURITIES
                        UNDERWRITER                           TO BE PURCHASED
                        -----------                           ---------------

Goldman, Sachs & Co.  . . . . . . . . . . . . . . . . .
Smith Barney Inc. . . . . . . . . . . . . . . . . . . .
CS First Boston Corporation . . . . . . . . . . . . . .
PaineWebber Incorporated . . . . . . . . . . . . . . .
[NAMES OF OTHER UNDERWRITERS] . . . . . . . . . . . . .

                                                                 ---------
            Total . . . . . . . . . . . . . . . . . . .
                                                                 ---------
                                                                 ---------


                                      -22-

<PAGE>

                                                                         ANNEX I


     Pursuant to Section 7(g) of the Underwriting Agreement, Deloitte & Touche
LLP shall furnish letters to the Underwriters to the effect that:

        (i)   They are independent certified public accountants with respect to
     the Guarantor and its subsidiaries within the meaning of the Act and the
     applicable published rules and regulations thereunder;

        (ii)  In their opinion, the financial statements and any supplementary
     financial information and schedules (and, if applicable, financial
     forecasts and/or pro forma financial information) examined by them and
     included or incorporated by reference in the Registration Statement or the
     Prospectus comply as to form in all material respects with the applicable
     accounting requirements of the Act or the Exchange Act, as applicable, and
     the related published rules and regulations thereunder; and, if applicable,
     they have made a review in accordance with standards established by the
     American Institute of Certified Public Accountants of the consolidated
     interim financial statements, selected financial data, pro forma financial
     information, financial forecasts and/or condensed financial statements
     derived from audited financial statements of the Guarantor for the periods
     specified in such letter, as indicated in their reports thereon, copies of
     which have been furnished to the representatives of the Underwriters (the
     "Representatives");

        (iii)  They have made a review in accordance with standards established
     by the American Institute of Certified Public Accountants of the unaudited
     condensed consolidated statements of income, consolidated balance sheets
     and consolidated statements of cash flows included in the Prospectus and/or
     included in the Guarantor's quarterly report on Form 10-Q incorporated by
     reference into the Prospectus as indicated in their reports thereon copies
     of which have been separately furnished to the Representatives; and on the
     basis of specified procedures including inquiries of officials of the
     Guarantor who have responsibility for financial and accounting matters
     regarding whether the unaudited condensed consolidated financial statements
     referred to in paragraph (vi)(A)(i) below comply as to form in all material
     respects with the applicable accounting requirements of the Act and the
     Exchange Act and the related published rules and regulations, nothing came
     to their attention that caused them to believe that the unaudited condensed
     consolidated financial statements do not comply as to form in all material
     respects with the applicable accounting requirements of the Act and the
     Exchange Act and the related published rules and regulations;

        (iv)  The unaudited selected financial information with respect to the
     consolidated results of operations and financial position of the Guarantor
     for the five most recent fiscal years included in the Prospectus and
     included or incorporated by reference in Item 6 of the Guarantor's Annual
     Report on Form 10-K for the most recent fiscal year agrees with the
     corresponding amounts (after restatement where applicable) in the audited
     consolidated financial statements for such five fiscal years which were
     included or incorporated by reference in the Guarantor's Annual Reports on
     Form 10-K for such fiscal years;

        (v)   They have compared the information in the Prospectus under
     selected captions with the disclosure requirements of Regulation S-K and on
     the basis of limited procedures specified in such letter nothing came to
     their attention as a result of the foregoing procedures

<PAGE>

     that caused them to believe that this information does not conform in all
     material respects with the disclosure requirements of Items 301, 302, 402
     and 503(d), respectively, of Regulation S-K;

        (vi)  On the basis of limited procedures, not constituting an
     examination in accordance with generally accepted auditing standards,
     consisting of a reading of the unaudited financial statements and other
     information referred to below, a reading of the latest available interim
     financial statements of the Guarantor and its subsidiaries, inspection of
     the minute books of the Guarantor and its subsidiaries since the date of
     the latest audited financial statements included or incorporated by
     reference in the Prospectus, inquiries of officials of the Guarantor and
     its subsidiaries responsible for financial and accounting matters and such
     other inquiries and procedures as may be specified in such letter, nothing
     came to their attention that caused them to believe that:

              (A)   (i) the unaudited condensed consolidated statements of
           income, consolidated balance sheets and consolidated statements of
           cash flows included in the Prospectus and/or included or
           incorporated by reference in the Guarantor's Quarterly Reports on
           Form 10-Q incorporated by reference in the Prospectus do not comply
           as to form in all material respects with the applicable accounting
           requirements of the Exchange Act and the related published rules and
           regulations, or (ii) any material modifications should be made to
           the unaudited condensed consolidated statements of income,
           consolidated balance sheets and consolidated statements of cash
           flows included in the Prospectus or included in the Guarantor's
           Quarterly Reports on Form 10-Q incorporated by reference in the
           Prospectus, for them to be in conformity with generally accepted
           accounting principles;

              (B)   any other unaudited income statement data and balance sheet
           items included in the Prospectus do not agree with the corresponding
           items in the unaudited consolidated financial statements from which
           such data and items were derived, and any such unaudited data and
           items were not determined on a basis substantially consistent with
           the basis for the corresponding amounts in the audited consolidated
           financial statements included or incorporated by reference in the
           Guarantor's Annual Report on Form 10-K for the most recent fiscal
           year;

              (C)   the unaudited financial statements which were not included
           in the Prospectus but from which were derived the unaudited
           condensed financial statements referred to in Clause (A) and any
           unaudited income statement data and balance sheet items included in
           the Prospectus and referred to in Clause (B) were not determined on
           a basis substantially consistent with the basis for the audited
           financial statements included or incorporated by reference in the
           Guarantor's Annual Report on Form 10-K for the most recent fiscal
           year;

              (D)   any unaudited pro forma consolidated condensed financial
           statements included or incorporated by reference in the Prospectus
           do not comply as to form in all material respects with the
           applicable accounting requirements of the Act and the published
           rules and regulations thereunder or the pro forma adjustments have
           not been properly applied to the historical amounts in the
           compilation of those statements;

              (E)   as of a specified date not more than five days prior to the
           date of such letter, there have been any changes in the consolidated
           capital stock (other than issuances of capital stock upon exercise
           of options and stock appreciation rights,


                                           2

<PAGE>

           upon earn-outs of performance shares and upon conversions of
           convertible securities, in each case which were outstanding on the
           date of the latest balance sheet included or incorporated by
           reference in the Prospectus) or any increase in the consolidated
           long-term debt of the Guarantor and its subsidiaries, or any
           decreases in consolidated net current assets or stockholders' equity
           or other items specified by the Representatives, or any increases in
           any items specified by the Representatives, in each case as compared
           with amounts shown in the latest balance sheet included or
           incorporated by reference in the Prospectus, except in each case for
           changes, increases or decreases which the Prospectus discloses have
           occurred or may occur or which are described in such letter; and
              (F)   for the period from the date of the latest financial
           statements included or incorporated by reference in the Prospectus
           to the specified date referred to in Clause (E) there were any
           decreases in consolidated net revenues or operating profit or the
           total or per share amounts of consolidated net income or other items
           specified by the Representatives, or any increases in any items
           specified by the Representatives, in each case as compared with the
           comparable period of the preceding year and with any other period of
           corresponding length specified by the Representatives, except in
           each case for increases or decreases which the Prospectus discloses
           have occurred or may occur or which are described in such letter;
           and

        (vii)  In addition to the examination referred to in their report(s)
     included or incorporated by reference in the Prospectus and the limited
     procedures, inspection of minute books, inquiries and other procedures
     referred to in paragraphs (iii) and (vi) above, they have carried out
     certain specified procedures, not constituting an examination in accordance
     with generally accepted auditing standards, with respect to certain
     amounts, percentages and financial information specified by the
     Representatives which are derived from the general accounting records of
     the Guarantor and its subsidiaries, which appear in the Prospectus
     (excluding documents incorporated by reference) or in Part II of, or in
     exhibits and schedules to, the Registration Statement specified by the
     Representatives or in documents incorporated by reference in the Prospectus
     specified by the Representatives, and have compared certain of such
     amounts, percentages and financial information with the accounting records
     of the Guarantor and its subsidiaries and have found them to be in
     agreement.


                                           3




<PAGE>

                                                                    EXHIBIT 4(c)
                                                           Draft of July 5, 1995

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

                               COMSAT Corporation,

                                       To

                       The First National Bank of Chicago,
                                                   Trustee


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


                                    Indenture

                         Dated as of             , 1995
                                     ------------


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


                                  $206,200,000


                 % Junior Subordinated Deferrable Interest Debentures
           ------


                            Due                , 2025
                                ---------------

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

<PAGE>

                 Certain Sections of this Indenture relating to
                         Sections 310 through 318 of the
                          Trust Indenture Act of 1939:

  Trust Indenture                                                    Indenture
    Act Section                                                       Section
- ------------------                                                --------------

Section 310 (a)(1)    . . . . . . . . . . . . . . . . . . . .     609
            (a)(2)    . . . . . . . . . . . . . . . . . . . .     609
            (a)(3)    . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (a)(4)    . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (b)       . . . . . . . . . . . . . . . . . . . .     608,610
Section 311 (a)       . . . . . . . . . . . . . . . . . . . .     613
            (b)       . . . . . . . . . . . . . . . . . . . .     613
Section 312 (a)       . . . . . . . . . . . . . . . . . . . .     701
                                                                  702(a)
            (b)       . . . . . . . . . . . . . . . . . . . .     702(b)
            (c)       . . . . . . . . . . . . . . . . . . . .     702(c)
Section 313 (a)       . . . . . . . . . . . . . . . . . . . .     703(a)
            (b)       . . . . . . . . . . . . . . . . . . . .     703(a)
            (c)       . . . . . . . . . . . . . . . . . . . .     703(a)
            (d)       . . . . . . . . . . . . . . . . . . . .     703(b)
Section 314 (a)       . . . . . . . . . . . . . . . . . . .       704
            (b)       . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (c)(1)    . . . . . . . . . . . . . . . . . . . .     102
            (c)(2)    . . . . . . . . . . . . . . . . . . . .     102
            (c)(3)    . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (d)       . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (e)       . . . . . . . . . . . . . . . . . . . .     102
Section 315 (a)       . . . . . . . . . . . . . . . . . . . .     601
            (b)       . . . . . . . . . . . . . . . . . . . .     602
            (c)       . . . . . . . . . . . . . . . . . . . .     601
            (d)       . . . . . . . . . . . . . . . . . . . .     601
            (e)       . . . . . . . . . . . . . . . . . . . .     514
Section 316 (a)(1)(A) . . . . . . . . . . . . . . . . . . . .     502
                                                                  512
            (a)(1)(B) . . . . . . . . . . . . . . . . . . . .     513
            (a)(2)    . . . . . . . . . . . . . . . . . . . .     Not Applicable
            (b)       . . . . . . . . . . . . . . . . . . . .     508
            (c)       . . . . . . . . . . . . . . . . . . . .     104(c)
Section 317 (a) (1)   . . . . . . . . . . . . . . . . . . . .     503
            (a) (2)   . . . . . . . . . . . . . . . . . . . .     504
            (b)       . . . . . . . . . . . . . . . . . . . .     1003
Section 318 (a)       . . . . . . . . . . . . . . . . . . . .     107


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

          Note:     This reconciliation and tie shall not, for any purpose, be
deemed to be a part of the Indenture.

<PAGE>

                                TABLE OF CONTENTS

                                                                            PAGE

Parties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
Recitals of the Company and COMSAT Capital  . . . . . . . . . . . . . . . . .  1


                                   ARTICLE ONE

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

          Section 101.        Definitions . . . . . . . . . . . . . . . . .    2
                              Act . . . . . . . . . . . . . . . . . . . . .    2
                              Additional Dividends  . . . . . . . . . . . .    2
                              Additional Interest . . . . . . . . . . . . .    3
                              Affiliate . . . . . . . . . . . . . . . . . .    3
                              Board of Directors  . . . . . . . . . . . . .    3
                              Board Resolution  . . . . . . . . . . . . . .    3
                              Business Day  . . . . . . . . . . . . . . . .    3
                              Capital Lease Obligation  . . . . . . . . . .    3
                              Commission  . . . . . . . . . . . . . . . . .    3
                              Common Stock  . . . . . . . . . . . . . . . .    4
                              Company . . . . . . . . . . . . . . . . . . .    4
                              Company Request or Company Order  . . . . . .    4
                              COMSAT Capital  . . . . . . . . . . . . . . .    4
                              Corporate Trust Office  . . . . . . . . . . .    4
                              Corporation . . . . . . . . . . . . . . . . .    4
                              Defaulted Interest  . . . . . . . . . . . . .    4
                              Designated Senior Holder  . . . . . . . . . .    4
                              Event of Default  . . . . . . . . . . . . . .    4
                              General Partner . . . . . . . . . . . . . . .    4
                              General Partner Contribution  . . . . . . . .    4
                              Holder  . . . . . . . . . . . . . . . . . . .    4
                              Indenture . . . . . . . . . . . . . . . . . .    4
                              Interest Payment Date . . . . . . . . . . . .    5
                              Limited Partnership Agreement . . . . . . . .    5
                              Maturity  . . . . . . . . . . . . . . . . . .    5
                              NYSE  . . . . . . . . . . . . . . . . . . . .    5
                              Officers' Certificate . . . . . . . . . . . .    5
                              Opinion of Counsel  . . . . . . . . . . . . .    5
                              Outstanding . . . . . . . . . . . . . . . . .    5
                              Parent Guarantee  . . . . . . . . . . . . . .    6
                              Paying Agent  . . . . . . . . . . . . . . . .    6
                              Person  . . . . . . . . . . . . . . . . . . .    6
                              Predecessor Security  . . . . . . . . . . . .    7
                              Preferred Securities  . . . . . . . . . . . .    7


- ----------------------
Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                       -i-

<PAGE>

                              Redemption Date . . . . . . . . . . . . . . .    7
                              Redemption Price  . . . . . . . . . . . . . .    7
                              Regular Record Date . . . . . . . . . . . . .    7
                              Responsible Officer . . . . . . . . . . . . .    7
                              Scheduled Maturity Date . . . . . . . . . . .    7
                              Securities  . . . . . . . . . . . . . . . . .    7
                              Securities Payment  . . . . . . . . . . . . .    7
                              Security Register and Security
                                   Registrar  . . . . . . . . . . . . . . .    7
                              Senior Indebtedness . . . . . . . . . . . . .    7
                              Senior Payment Default  . . . . . . . . . . .    8
                              Special Record Date . . . . . . . . . . . . .    8
                              Special Representative  . . . . . . . . . . .    8
                              Stated Maturity . . . . . . . . . . . . . . .    8
                              Subsidiary  . . . . . . . . . . . . . . . . .    8
                              Trustee . . . . . . . . . . . . . . . . . . .    9
                              Trust Indenture Act . . . . . . . . . . . . .    9
                              U.S. Government Obligations . . . . . . . . .    9
                              Vice President  . . . . . . . . . . . . . . .    9
          Section 102.        Compliance Certificates and Opinions  . . . .    9
          Section 103.        Form of Documents Delivered to Trustee  . . .   10
          Section 104.        Acts of Holders; Record Dates . . . . . . . .   10
          Section 105.        Notices, etc., to Trustee, Company and
                              COMSAT Capital  . . . . . . . . . . . . . . .   11
          Section 106.        Notice to Holders; Waiver . . . . . . . . . .   12
          Section 108.        Conflict with Trust Indenture Act . . . . . .   13
          Section 109.        Effect of Headings and Table of
                               Contents . . . . . . . . . . . . . . . . . .   13
          Section 110.        Successors and Assigns  . . . . . . . . . . .   13
          Section 111.        Separability Clause . . . . . . . . . . . . .   13
          Section 112.        Benefits of Indenture . . . . . . . . . . . .   13
          Section 113.        Governing Law . . . . . . . . . . . . . . . .   14
          Section 114.        Legal Holidays  . . . . . . . . . . . . . . .   14

                                   ARTICLE TWO

                                 SECURITY FORMS
          Section 201.        Forms Generally . . . . . . . . . . . . . . .   14
          Section 202.        Form of Face of Security  . . . . . . . . . .   15
          Section 203.        Form of Reverse of Security . . . . . . . . .   18
          Section 204.        Form of Trustee's Certificate of
                               Authentication . . . . . . . . . . . . . . .   21

                                  ARTICLE THREE

                                 THE SECURITIES


- ---------------------
Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                      -ii-

<PAGE>

          Section 301.        Title and Terms . . . . . . . . . . . . . . .   21
          Section 302.        Denominations . . . . . . . . . . . . . . . .   24
          Section 303.        Execution, Authentication, Delivery and
                               Dating . . . . . . . . . . . . . . . . . . .   24
          Section 304.        Temporary Securities  . . . . . . . . . . . .   25
          Section 305.        Registration, Registration of Transfer
                              and Exchange  . . . . . . . . . . . . . . . .   25
          Section 306.        Mutilated, Destroyed, Lost and Stolen
                               Securities . . . . . . . . . . . . . . . . .   26
          Section 307.        Payment of Interest; Interest Rights
                               Preserved  . . . . . . . . . . . . . . . . .   27
          Section 308.        Persons Deemed Owners . . . . . . . . . . . .   28
          Section 309.        Cancellation  . . . . . . . . . . . . . . . .   29
          Section 310.        Computation of Interest . . . . . . . . . . .   29

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE
          Section 401.        Satisfaction and Discharge of Indenture . . .   29
          Section 402.        Application of Trust Money  . . . . . . . . .   30
          Section 403.        Defeasance and Discharge of Indenture . . . .   31
          Section 404.        Reinstatement . . . . . . . . . . . . . . . .   33

                                  ARTICLE FIVE

                                    REMEDIES
          Section 501.        Events of Default . . . . . . . . . . . . . .   34
          Section 502.        Acceleration of Maturity; Rescission and
                              Annulment . . . . . . . . . . . . . . . . . .   35
          Section 503.        Collection of Indebtedness and Suits for
                              Enforcement by Trustee  . . . . . . . . . . .   36
          Section 504.        Trustee May File Proofs of Claim  . . . . . .   37
          Section 505.        Trustee May Enforce Claims Without
                              Possession of Securities  . . . . . . . . . .   37
          Section 506.        Application of Money Collected  . . . . . . .   38
          Section 507.        Limitation on Suits . . . . . . . . . . . . .   38
          Section 508.        Unconditional Right of Holders to
                              Receive Principal and Interest  . . . . . . .   39
          Section 509.        Restoration of Rights and Remedies  . . . . .   39
          Section 510.        Rights and Remedies Cumulative  . . . . . . .   39


Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                      -iii-

<PAGE>

          Section 511.        Delay or Omission Not Waiver  . . . . . . . .   40
          Section 512.        Control by Holders  . . . . . . . . . . . . .   40
          Section 513.        Waiver of Past Defaults . . . . . . . . . . .   40
          Section 514.        Undertaking for Costs . . . . . . . . . . . .   41
          Section 515.        Waiver of Stay or Extension Laws  . . . . . .   41

                                   ARTICLE SIX

                                   THE TRUSTEE
          Section 601.        Certain Duties and Responsibilities . . . . .   42
          Section 602.        Notice of Defaults  . . . . . . . . . . . . .   43
          Section 603.        Certain Rights of Trustee . . . . . . . . . .   43
          Section 604.        Not Responsible for Recitals or Issuance
                              of Securities . . . . . . . . . . . . . . . .   44
          Section 605.        May Hold Securities . . . . . . . . . . . . .   45
          Section 606.        Money Held in Trust . . . . . . . . . . . . .   45
          Section 607.        Compensation and Reimbursement  . . . . . . .   45
          Section 608.        Disqualification; Conflicting Interests . . .   45
          Section 609.        Corporate Trustee Required; Eligibility . . .   46
          Section 610.        Resignation and Removal; Appointment of
                              Successor . . . . . . . . . . . . . . . . . .   46
          Section 611.        Acceptance of Appointment by Successor  . . .   47
          Section 612.        Merger, Conversion, Consolidation or
                              Succession to Business  . . . . . . . . . . .   48
          Section 613.        Preferential Collection of Claims
                              Against Company . . . . . . . . . . . . . . .   48

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY
          Section 701.        Company to Furnish Trustee Names and
                              Addresses of Holders  . . . . . . . . . . . .   48
          Section 702.        Preservation of Information;
                              Communications to Holders . . . . . . . . . .   49
          Section 703.        Reports by Trustee  . . . . . . . . . . . . .   49
          Section 704.        Reports by Company  . . . . . . . . . . . . .   50

                                  ARTICLE EIGHT

                    CONSOLIDATION, MERGER, OR SALE OF ASSETS
          Section 801.        No Restrictions . . . . . . . . . . . . . . .   50


- ----------------
Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                      -iv-

<PAGE>

          Section 802.        Successor Substituted . . . . . . . . . . . .   50

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES
          Section 902.        Supplemental Indentures with Consent of
                               Holders  . . . . . . . . . . . . . . . . . .   52
          Section 903.        Execution of Supplemental Indentures  . . . .   53
          Section 904.        Effect of Supplemental Indentures . . . . . .   53
          Section 905.        Conformity with Trust Indenture Act . . . . .   54
          Section 906.        Reference in Securities to Supplemental
                              Indentures  . . . . . . . . . . . . . . . . .   54

                                   ARTICLE TEN

                    COVENANTS; REPRESENTATIONS AND WARRANTIES
          Section 1001.       Payment of Principal and Interest . . . . . .   54
          Section 1002.       Maintenance of Office or Agency . . . . . . .   54
          Section 1003.       Money for Securities Payments to Be Held
                               in Trust   . . . . . . . . . . . . . . . . .   55
          Section 1004.       Statement by Officers as to Default . . . . .   56
          Section 1005.       Existence . . . . . . . . . . . . . . . . . .   56
                                                                              56
          Section 1006.       Additional Covenants  . . . . . . . . . . . .   56
                                                                              58

                                 ARTICLE ELEVEN

                           SUBORDINATION OF SECURITIES
          Section 1101.       Securities Subordinate to Senior
                               Indebtedness  . . . . . . . . . . . . . . .    58
          Section 1102.       Payment Over of Proceeds Upon
                               Dissolution, Etc   . . . . . . . . . . . . .   58
          Section 1103.       No Payment When Senior Indebtedness in
                              Default . . . . . . . . . . . . . . . . . . .   59
          Section 1104.       Payment Permitted If No Default . . . . . . .   60
          Section 1105.       Subrogation to Rights of Holders of
                              Senior Indebtedness . . . . . . . . . . . . .   60
          Section 1106.       Provisions Solely to Define Relative
                               Rights   . . . . . . . . . . . . . . . . . .   61


- ------------------
Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                       -v-

<PAGE>

          Section 1107.       Trustee to Effectuate Subordination . . . . .   61
          Section 1108.       No Waiver of Subordination Provisions . . . .   61
          Section 1109.       Notice to Trustee . . . . . . . . . . . . . .   62
          Section 1110.       Reliance on Judicial Order or
                              Certificate of Liquidating Agent  . . . . . .   63
          Section 1111.       Trustee Not Fiduciary for Holders of
                              Senior Indebtedness . . . . . . . . . . . . .   64
          Section 1112.       Rights of Trustee as Holder of Senior
                              Indebtedness; Preservation of Trustee's
                              Rights  . . . . . . . . . . . . . . . . . . .   64
          Section 1113.       Article Applicable to Paying Agents . . . . .   64


                                 ARTICLE TWELVE

                            REDEMPTION OF SECURITIES
          Section 1201.       Mandatory Redemption; Optional
                              Redemption  . . . . . . . . . . . . . . . . .   65
          Section 1202.       Applicability of Article  . . . . . . . . . .   65
          Section 1203.       Election to Redeem; Notice to Trustee . . . .   66
          Section 1204.       Notice of Redemption  . . . . . . . . . . . .   66
          Section 1205.       Deposit of Redemption Price . . . . . . . . .   66
          Section 1206.       Securities Payable on Redemption Date . . . .   67


ANNEX A:  Form of Amended and Restated Agreement of Limited Partnership of
          COMSAT Capital I, L.P., dated as of ____________, 1995.


- ------------------
Note:     This table of contents shall not, for any purpose, be deemed to be a
          part of the Indenture.

                                      -vi-

<PAGE>

          INDENTURE, dated as of _____________, 1995, between COMSAT
Corporation, a corporation duly organized and existing under the laws of the
District of Columbia (herein called the "Company" or "COMSAT"), currently having
its principal office at 6560 Rock Spring Drive, Bethesda, Maryland 20817, and
the general partner of COMSAT Capital I, L.P., a limited partnership organized
under the laws of the State of Delaware (herein called "COMSAT Capital"),
currently having its principal office at c/o COMSAT Corporation, 6560 Rock
Spring Drive, Bethesda, Maryland 20817, and The First National Bank of Chicago,
a national banking association duly organized and existing under the laws of
the United States of America, as Trustee (herein called the "Trustee").  Unless
otherwise defined herein, all capitalized terms used herein shall have the
meanings ascribed to them in the Amended and Restated Agreement of Limited
Partnership of COMSAT Capital I, L.P., dated as of ____________, 1995 (the
"Limited Partnership Agreement"), as in effect on the date hereof, the form of
which is attached as Annex A hereto.


                             RECITALS OF THE COMPANY

          WHEREAS, COMSAT Capital may pursuant to the Underwriting Agreement
dated ____________, 1995 (the "Underwriting Agreement") among the Company,
COMSAT Capital and the Underwriters named therein issue up to $200,000,000
aggregate liquidation preference of its ___% Cumulative Monthly Income Preferred
Securities (the "Preferred Securities") with a liquidation preference of $25 per
Preferred Security;

          WHEREAS, the Company is guaranteeing the payment of Dividends on the
Preferred Securities (if and to the extent declared from funds of COMSAT Capital
legally available therefor), and payment of the Redemption Price (as defined
herein) and payments on liquidation with respect to the Preferred Securities, to
the extent provided in the Guarantee Agreement dated ____________, 1995 between
the Company and COMSAT Capital (the "Parent Guarantee") for the benefit of the
holders of the Preferred Securities;

          WHEREAS, the Company wishes to sell to COMSAT Capital Securities in an
aggregate principal amount equal to the sum of the capital contributed by the
Company to COMSAT Capital as the general partner thereof (the "General Partner
Contribution") and the aggregate stated liquidation preference of the Preferred
Securities issued and sold by COMSAT Capital pursuant to the Underwriting
Agreement;

          WHEREAS, the Company has duly authorized the creation of an issue of
its _____% Junior Subordinated Deferrable Interest Debentures Due ____________,
2025 (subject to extension) (the "Securities"), of substantially the tenor and
amount hereinafter set forth and to provide therefor the Company has duly
authorized the execution and delivery of this Indenture; and

<PAGE>

          WHEREAS, all things necessary to make the Securities, when executed by
the Company and authenticated and delivered hereunder and duly issued by the
Company, the valid obligations of the Company, and to make this Indenture a
valid agreement of the Company, in accordance with their and its terms, have
been done.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually agreed, for the equal and
proportionate benefit of all Holders of the Securities, as follows:


                                   ARTICLE ONE

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION


Section 101.        Definitions.

          For all purposes of this Indenture, except as otherwise expressly
provided or unless the context otherwise requires:

          (1)       the terms defined in this Article have the meanings assigned
to them in this Article and include the plural as well as the singular;

          (2)       all other terms used herein which are defined in the Trust
Indenture Act (as defined herein), either directly or by reference therein, have
the meanings assigned to them therein;

          (3)       all accounting terms not otherwise defined herein have the
meanings assigned to them in accordance with generally accepted accounting
principles and, except as otherwise herein expressly provided, the term
"generally accepted accounting principles" with respect to any computation
required or permitted hereunder shall mean such accounting principles as are
generally accepted at the date of such computation; and

          (4)       the words "herein", "hereof" and "hereunder" and other words
of similar import refer to this Indenture as a whole and not to any particular
Article, Section or other subdivision.

          "Act", when used with respect to any Holder, has the meaning specified
in Section 104.

          "Additional Dividends" means dividends that shall accrue on any
dividend arrearages in respect of the Preferred Securities at the rate of
______% per annum compounded monthly.


                                       -2-

<PAGE>

          "Additional Interest" means  (i) interest that shall accrue on any
interest on the Securities that is not paid when due or not paid during an
extension of an interest payment period, which in either case shall accrue at
the rate of ______% per annum  compounded monthly, and (ii) an amount equal to
any amount that COMSAT Capital would be required to pay in taxes, duties,
assessments or governmental charges of whatever nature (other than withholding
taxes) imposed by the United States or any other taxing authority such that the
net amounts received and retained by COMSAT Capital after paying any such taxes,
duties, assessments or governmental charges will not be less than the amounts
COMSAT Capital would have received had no such taxes, duties, assessments or
governmental charges been imposed.

          "Affiliate" of any specified Person (as defined herein) means any
other Person directly or indirectly controlling or controlled by or under direct
or indirect common control with such specified Person.  For the purposes of this
definition, "Control" when used with respect to any specified Person means the
power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or
otherwise; and the terms "Controlling" and "Controlled" have meanings
correlative to the foregoing.

          "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of that board.

          "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

          "Business Day" means any day other than a day on which banking
institutions in New York City are authorized or obligated by law or executive
order to close.

          "Capital Lease Obligation" of any Person means the obligation to pay
rent or other payment amounts under a lease of (or other indebtedness
arrangements conveying the right to use) real or personal property of such
Person which is required to be classified and accounted for as a capital lease
or a liability on the face of a balance sheet of such Person in accordance with
generally accepted accounting principles.

          "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Securities Exchange Act of 1934, or,
if at any time after the execution of this instrument such Commission is not
existing and performing the duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.


                                       -3-

<PAGE>

          "Common Stock" includes any stock of any class of the Company which
has no 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 and which is not subject to redemption by the Company.

          "Company" or "COMSAT" means the Person named as the "Company"  or
"COMSAT" in the first paragraph of this instrument until a successor Person
shall have become such pursuant to the applicable provisions of this Indenture,
and thereafter "Company" or "COMSAT" shall mean such successor Person.

          "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman of the Board, its Vice
Chairman of the Board, its President or a Vice President, and by its Treasurer,
an Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered
to the Trustee.

          "COMSAT Capital" means the Person specified as such in the first
paragraph of this instrument or any successor thereto permitted pursuant to the
Limited Partnership Agreement.

          "Corporate Trust Office" means the principal office of the Trustee in
Chicago, Illinois, at which at any particular time its corporate trust business
shall be administered.

          "Corporation" means a corporation, association, company, joint-stock
company or business trust.

          "Defaulted Interest" has the meaning specified in Section 307.

          "Designated Senior Holder" means, with respect to any Senior
Indebtedness, the Person designated as such in accordance with the terms of the
instrument evidencing such Senior Indebtedness or, if no Person is so
designated, any trustee, agent, fiduciary, representative, group or Person
authorized to act on behalf of the holders of such Senior Indebtedness.

          "Event of Default" has the meaning specified in Section 501.

          "General Partner" has the meaning specified in the Limited Partnership
Agreement.

          "General Partner Contribution" has the meaning specified in the
Recitals to this instrument.

          "Holder" means a Person in whose name a Security is registered in the
Security Register (as defined herein).

          "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or


                                       -4-

<PAGE>

amended by one or more indentures supplemental hereto entered into pursuant to
the applicable provisions hereof, including, for all purposes of this instrument
and any such supplemental indenture, the provisions of the Trust Indenture Act
that are deemed to be a part of and govern this instrument and any such
supplemental indenture, respectively.

          "Interest Deferral Event" means failure of Holders of Preferred
Securities (including any such failure following an election by the Company to
extend interest payments on the Securities in accordance with their terms) to
receive, for 18 consecutive months, the full amount of Dividends (including
Additional Dividends) accumulated on the Preferred Securities.

          "Interest Payment Date" means the Stated Maturity (as defined herein)
of each installment of interest on the Securities, which shall be on the last
day of each calendar month of each year commencing ____________, 1995 until the
principal of the Securities is paid or duly provided for.

          "Investment Grade" means with respect to any security a security that
has been rated in one of the four highest rating categories by Standard & Poor's
Corporation, Moody's Investors Service, Inc., Fitch Investor Services, Duff &
Phelps Credit Rating Company or any other nationally recognized statistical
rating organization.

          "Limited Partnership Agreement" has the meaning specified in the first
paragraph of this instrument.

          "Maturity", when used with respect to any Security, means the date on
which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption or otherwise.

          "NYSE" means the New York Stock Exchange.

          "Officers' Certificate" means a certificate signed by the Chairman of
the Board, a Vice Chairman of the Board, the President or a Vice President, and
by the Treasurer, an Assistant Treasurer, the Secretary or an Assistant
Secretary, of the Company, and delivered to the Trustee.  One of the officers
signing an Officers' Certificate given pursuant to Section 1004 shall be the
principal executive, financial or accounting officer of the Company.

          "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company, and who shall be acceptable to the Trustee.

          "Outstanding", when used with respect to Securities, means, as of the
date of determination, all Securities


                                       -5-

<PAGE>

theretofore authenticated and delivered under this Indenture, EXCEPT:

          (i)       Securities theretofore cancelled by the Trustee or delivered
to the Trustee for cancellation;

          (ii)      Securities for whose payment or redemption money in the
necessary amount has been theretofore deposited with the Trustee or any Paying
Agent (other than the Company) in trust or set aside and segregated in trust by
the Company (if the Company shall act as its own Paying Agent (as defined
herein))  for the Holders of such Securities; PROVIDED, that, if such Securities
are to be redeemed, notice of such redemption has been duly given pursuant to
this Indenture or provision therefor satisfactory to the Trustee has been made;
and

          (iii)     Securities which have been paid pursuant to Section 306 or
in exchange for or in lieu of which other Securities have been authenticated and
delivered pursuant to this Indenture, other than any such Securities in respect
of which there shall have been presented to the Trustee proof satisfactory to it
that such Securities are held by a bona fide purchaser in whose hands such
Securities are valid obligations of the Company;

PROVIDED, HOWEVER, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor (other than COMSAT Capital) shall be
disregarded and deemed not to be Outstanding, except that, in determining
whether the Trustee shall be protected in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Securities which the
Trustee knows to be so owned shall be so disregarded.  Securities so owned which
have been pledged in good faith may be regarded as Outstanding if the pledgee
establishes to the satisfaction of the Trustee the pledgee's right so to act
with respect to such Securities and that the pledgee is not the Company or any
other obligor upon the Securities or any Affiliate of the Company or of such
other obligor.

          "Parent Guarantee" has the meaning specified in the Recitals to this
instrument.

          "Paying Agent" means any Person authorized by the Company to pay the
principal of or interest on any Securities on behalf of the Company.

          "Person" means any individual, corporation, partnership, joint
venture, trust, unincorporated organization or government or any agency or
political subdivision thereof.


                                       -6-

<PAGE>

          "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

          "Preferred Securities" has the meaning specified in the Recitals to
this instrument.

          "Redemption Date", when used with respect to any Security to be
redeemed, means the date fixed for such redemption by or pursuant to this
Indenture.

          "Redemption Price", when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed pursuant to this
Indenture.

          "Regular Record Date" for the interest payable on any Interest Payment
Date means the Business Day next preceding such Interest Payment Date, subject
to the proviso in Section 307.

          "Responsible Officer", when used with respect to the Trustee, means
the chairman or any vice-chairman of the board of directors, the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee, the president, any vice president, the secretary, any
assistant secretary, the treasurer, any assistant treasurer, the cashier, any
assistant cashier, any trust officer or assistant trust officer, the controller
or any assistant controller or any other officer of the Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate trust matter,
any other officer to whom such matter is referred because of his knowledge of
and familiarity with the particular subject.

          "Scheduled Maturity Date" means ___________, 2025.

          "Securities" has the meaning specified in the Recitals to this
instrument.

          "Securities Payment" has the meaning specified in Section 1102.

          "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

          "Senior Indebtedness" means the principal of, premium, if any,
interest on and any other payment due pursuant to any of the following, whether
outstanding at the date of execution hereof or hereafter incurred:


                                       -7-

<PAGE>

          (i)       all indebtedness of the Company evidenced by notes,
debentures, bonds or other securities sold by the Company for money;

          (ii)      all Capital Lease Obligations of the Company;

          (iii)     all obligations of others of the kinds described in the
preceding clauses (i) and (ii) assumed by or guaranteed in any manner by the
Company or in effect guaranteed by the Company; and

          (iv)      all renewals, extensions or refundings of obligations of the
kinds described in any of the preceding clauses (i), (ii) and (iii);

PROVIDED, HOWEVER, that the following shall not constitute Senior Indebtedness:
(A) that percentage of any indebtedness of the Company to any Subsidiary (as
defined herein) of the Company which is equal to the Company's percentage
interest in such Subsidiary, or (B) any indebtedness which by the terms of the
instrument creating or evidencing the same expressly provides that such
indebtedness is not superior in right of payment to or is PARI PASSU with the
Securities.  Senior Indebtedness shall continue to be Senior Indebtedness and
entitled to the benefits of the subordination provisions irrespective of any
amendment, modification or waiver of any term of such Senior Indebtedness.

          "Senior Payment Default" has the meaning specified in Section 1103.

          "Special Record Date" for the payment of any Defaulted Interest means
a date fixed by the Trustee pursuant to Section 307.

          "Special Representative" means the Person appointed under the Limited
Partnership Agreement to exercise the right of COMSAT Capital as a Holder of the
Securities to accelerate the principal amount of the Securities upon an Event of
Default, to enforce COMSAT Capital's creditors rights upon an Interest Deferral
Event, and to enforce COMSAT Capital's other creditor rights hereunder and under
the Securities and the Guarantee.

          "Stated Maturity", where used with respect to any Security or any
installment of interest thereon, means the date specified in such Security as
the fixed date on which the principal, together with any accrued and unpaid
interest (including Additional Interest), of such Security or such installment
of interest is due and payable.

          "Subsidiary" means a corporation more than 50% of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries, or by the Company and one or more other
Subsidiaries.  For the purposes of this definition, "voting stock" means stock
which


                                       -8-

<PAGE>

ordinarily has voting power for the election of directors, whether at all times
or only so long as no senior class of stock has such voting power by reason of
any contingency.

          "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean such successor Trustee.

          "Trust Indenture Act" means the Trust Indenture Act of 1939 as in
force at the date as of which this instrument was executed; PROVIDED, HOWEVER,
that in the event the Trust Indenture Act of 1939 is amended after such date,
"Trust Indenture Act" means, to the extent required by any such amendment, the
Trust Indenture Act of 1939 as so amended.

          "U.S. Government Obligations" means direct obligations of or
obligations of a Person controlled or supervised by and acting as an agency or
instrumentality of (or certificates representing ownership interests in such
obligations held by a custodian on behalf of the owners of such ownership
interests PROVIDED that (except as required by law) such custodian is not
authorized to make any deduction from the amount payable to the owner of such
obligations from any amount received by the custodian in respect of the U.S.
Government Obligation or the specific payment of principal of or interest on the
U.S. Government Obligation evidenced by such certificate) the United States of
America, (i) the timely payment of which is unconditionally guaranteed by the
United States of America, (ii) for the payment of which the full faith and
credit of the United States of America is pledged, and (iii) which are not
callable or redeemable at the issuer's option.

          "Vice President", when used with respect to the Company or the
Trustee, means any vice president, whether or not designated by a number or a
word or words added before or after the title "vice president".


Section 102.        Compliance Certificates and Opinions.

          Upon any application or request by the Company to the Trustee to take
any action under any provision of this Indenture, the Company shall furnish to
the Trustee such certificates and opinions as may be required under the Trust
Indenture Act.  Each such certificate or opinion shall be given in the form of
an Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirement set forth in
this Indenture.


                                       -9-

<PAGE>

Section 103.  Form of Documents Delivered to Trustee.

          In any case where several matters are required to be certified by, or
covered by an opinion of, any specified Person, it is not necessary that all
such matters be certified by, or covered by the opinion of, only one such
Person, or that they be so certified or covered by only one document, but one
such Person may certify or give an opinion with respect to some matters and one
or more other such Persons as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

          Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous.  Any such certificate or opinion of counsel may be based, insofar as
it relates to factual matters, upon a certificate or opinion of, or
representations by, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters are erroneous.

          Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.


Section 104.        Acts of Holders; Record Dates.

          (a)       Any request, demand, authorization, direction, notice,
consent, waiver or other action provided by this Indenture to be given or taken
by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required, to the Company.  Such
instrument or instruments (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders signing
such instrument or instruments.  Proof of execution of any such instrument or of
a writing appointing any such agent shall be sufficient for any purpose of this
Indenture and (subject to Section 601) conclusive in favor of the Trustee and
the Company, if made in the manner provided in this Section.

          (b)       The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit


                                      -10-

<PAGE>

of a witness of such execution or by a certificate of a notary public or other
officer authorized by law to take acknowledgments of deeds, certifying that the
individual signing such instrument or writing acknowledged to him the execution
thereof.  Where such execution is by a signer acting in a capacity other than
his individual capacity, such certificate or affidavit shall also constitute
sufficient proof of his authority.  The fact and date of the execution of any
such instrument or writing, or the authority of the Person executing the same,
may also be proved in any other manner which the Trustee deems sufficient.

          (c)       The Company may, in the circumstances permitted by the Trust
Indenture Act, fix any day as the record date for the purpose of determining the
Holders entitled to give or take any request, demand, authorization, direction,
notice, consent, waiver or other action, or to vote on any action, authorized or
permitted to be given or taken by Holders.  If not set by the Company prior to
the first solicitation of a Holder made by any Person in respect of any such
action, or, in the case of any such vote, prior to such vote, the record date
for any such action or vote shall be the 30th day (or, if later, the date of the
most recent list of Holders required to be provided pursuant to Section 701)
prior to such first solicitation or vote, as the case may be.  With regard to
any record date, only the Holders on such date (or their duly designated
proxies) shall be entitled to give or take, or vote on, the relevant action.

          (d)       The ownership of Securities shall be proved by the Security
Register.

          (e)       Any request, demand, authorization, direction, notice,
consent, waiver or other Act of the Holder of any Security shall bind every
future Holder of the same Security and the Holder of every Security issued upon
the registration of transfer thereof or in exchange therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee or
the Company in reliance thereon, whether or not notation of such action is made
upon such Security.


Section 105.        Notices, etc., to Trustee, Company and COMSAT Capital.

          Any request, demand, authorization, direction, notice, consent, waiver
or Act of Holders or other document provided or permitted by this Indenture to
be made upon, given or furnished to, or filed with,

          (1)       the Trustee by any Holder or by the Company shall be
sufficient for every purpose hereunder if made, given, furnished or filed in
writing to or with the Trustee at its Corporate Trust Office, Attention:
Corporate Trust Services Division, or


                                      -11-

<PAGE>

          (2)       the Company by the Trustee or by any Holder shall be
sufficient for every purpose hereunder (unless otherwise herein expressly
provided) if in writing and mailed, first-class postage prepaid, to the Company
addressed to it at the address of its principal office specified in the first
paragraph of this instrument or at any other address previously furnished in
writing to the Trustee by the Company.


Section 106.        Notice to Holders; Waiver.

          Where this Indenture provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if in writing and mailed, first-class postage prepaid, to each Holder as to
which such notice is required to be made, at his or her address as it appears in
the Security Register, not later than the latest date (if any), and not earlier
than the earliest date (if any), prescribed for the giving of such notice.  In
any case where notice to Holders is given by mail, neither the failure to mail
such notice, nor any defect in any notice so mailed, to any particular Holder
shall affect the sufficiency of such notice with respect to other Holders.
Where this Indenture provides for notice in any manner, such notice may be
waived in writing by the Person entitled to receive such notice, either before
or after the event, and such waiver shall be the equivalent of such notice.
Waivers of notice by Holders shall be filed with the Trustee, but such filing
shall not be a condition precedent to the validity of any action taken in
reliance upon such waiver.

          In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such notification as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.


Section 107.        Immunity of Shareholders, Officers and Directors.

          No recourse shall be had for the payment of the principal of or the
interest, if any, on, any Security, or for any claim based thereon, or upon any
obligation, covenant or agreement of this Indenture or any supplemental
indenture, against any shareholder, officer or director, as such, past, present
or future of the Company or of any successor corporation, either directly or
indirectly through the Company or any successor corporation, whether by virtue
of any constitution, statute or rule of law or by the enforcement of any
assessment or penalty or otherwise; it being expressly agreed and understood
that this Indenture and any supplemental indenture and all the Securities are
solely corporate obligations, and that no personal liability whatever shall
attach to, or is incurred by, any shareholder, officer or director, past,
present or future, of the Company or of any successor corporation, either
directly or


                                      -12-

<PAGE>

indirectly through the Company or any successor corporation, because of the
incurring of the indebtedness hereby authorized or under or by reason of any of
the obligations, covenants or agreements contained in this Indenture or in any
of the Securities, or to be implied herefrom or therefrom; and that any and all
such personal liability is hereby expressly released and waived as a condition
of, and as part of the consideration for, the execution of this Indenture, any
supplemental indenture and the issue of the Securities.

Section 108.        Conflict with Trust Indenture Act.

          If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such Trust Indenture
Act to be a part of and govern this Indenture, the latter provision shall
control.  If any provision of this Indenture modifies or excludes any provision
of the Trust Indenture Act that may be so modified or excluded, the latter
provision shall be deemed to apply to this Indenture as so modified or to be
excluded, as the case may be.


Section 109.        Effect of Headings and Table of Contents.

          The Article and Section headings herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.


Section 110.        Successors and Assigns.

          All covenants and agreements in this Indenture by the Company shall
bind their respective successors and assigns, whether so expressed or not.


Section 111.        Separability Clause.

          In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

Section 112.        Benefits of Indenture.

          The Company's obligations under this Indenture and the Securities will
also be for the benefit of the holders from time to time of the Preferred
Securities.  Nothing in this Indenture or in the Securities, express or implied,
shall give to any Person, other than the parties hereto and their successors
hereunder, the holders of Senior Indebtedness, the holders of Preferred
Securities, the Special Representative and the Holders of Securities, any
benefit or any legal or equitable right, remedy or claim under this Indenture.


                                      -13-

<PAGE>

Section 113.        Governing Law.

          This Indenture and the Securities shall be governed by and construed
in accordance with the laws of the State of New York.


Section 114.        Legal Holidays.

          In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security shall not be a Business Day, then (notwithstanding any
other provision of this Indenture or of the Securities) payment of interest or
principal need not be made on such date, but may be made on the next succeeding
Business Day (subject, in the case of an Interest Payment Date, to Section 301)
with the same force and effect as if made on the Interest Payment Date or
Redemption Date, or at the Stated Maturity, PROVIDED that no interest shall
accrue for the period from and after such Interest Payment Date, Redemption Date
or Stated Maturity, as the case may be.


                                   ARTICLE TWO

                                 SECURITY FORMS


Section 201.        Forms Generally.

          The Securities and the Trustee's certificates of authentication shall
be in substantially the forms set forth in this Article, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be
required to comply with the rules of any securities exchange or as may,
consistently herewith, be determined by the officers executing such Securities,
as evidenced by their execution of the Securities.

          The definitive Securities shall be printed, lithographed or engraved
or produced by any combination of these or other methods, all as determined by
the officers executing such Securities, as evidenced by their execution of such
Securities.


                                      -14-

<PAGE>

Section 202.        Form of Face of Security.

                               COMSAT Corporation

           ______% Junior Subordinated Deferrable Interest Debentures
                             Due ____________, 2025


No.__________                                                        $__________


          COMSAT Corporation, a corporation duly organized and existing under
the laws of the District of Columbia (herein called "COMSAT", which term
includes any successor corporation under the Indenture hereinafter referred to),
for value received, hereby promises to pay to _________________________________,
or registered assigns, the principal sum of __________ Dollars on the earliest
of (i) ____________, 2025 (the "Scheduled Maturity Date") (subject to extension,
as provided herein) or (ii), except in the event that (A) a Tax Event or an
Investment Company Event has occurred and the General Partner of COMSAT Capital
II, L.P. ("COMSAT Capital") has elected to dissolve COMSAT Capital and cause the
Securities to be distributed to the holders of the Preferred Securities in
liquidation of COMSAT Capital as provided in Clauses (ii) or (iii) of Section
6.2(c) of the Limited Partnership Agreement or (B) COMSAT Capital is
consolidated, amalgamated, merged with or into, or replaced by, or conveys,
transfers or leases its properties and assets as an entirety to, any corporation
or other body pursuant to Section 9.12 of the Limited Partnership Agreement, the
date upon which COMSAT Capital is dissolved, wound up, liquidated or terminated
(other than any termination within the meaning of section 708(b)(1)(B) of the
Internal Revenue Code of 1986 or equivalent provision of subsequent law, which
termination does not constitute a termination of COMSAT Capital for any other
purpose), and to pay interest thereon at the rate of ______% per annum from
____________, 1995, payable monthly in arrears on the last day of each calendar
month of each year (each an "Interest Payment Date"), commencing ____________,
1995, until the principal hereof is paid or made available for payment.
Interest will compound monthly and will accrue at the rate of ______% per annum
on any interest installment that is not paid at the end of any monthly interest
period or when otherwise due.  The amount of interest payable for any period
will be computed on the basis of twelve 30-day months and a 360-day year and,
for any period shorter than a full monthly interest period, will be computed on
the basis of the actual number of days elapsed in such period.  In the event
that any date on which interest is payable on this Security is not a Business
Day, then a payment of the interest payable on such date will be made on the
next succeeding day which is a Business Day (and without any interest or other
payment in respect of any such delay), except that, if such Business Day is in
the next succeeding calendar year, such payment shall be made on the immediately
preceding Business Day, in each case with the same


                                      -15-

<PAGE>

force and effect as if made on such date.  A "Business Day" shall mean any day
other than a day on which banking institutions in New York City are authorized
or required by law or executive order to close.  The interest so payable, and
punctually paid or duly provided for, on any Interest Payment Date will, as
provided in the Indenture, be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on
the Regular Record Date for such interest, which shall be the Business Day next
preceding such Interest Payment Date; PROVIDED, HOWEVER, that if this Security
shall not continue to remain in book-entry-only form, the Company shall have the
right to select record dates which shall be more than one Business Day prior to
the Interest Payment Date.  Any such interest not so punctually paid or duly
provided for will forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on a
Special Record Date for the payment of such Defaulted Interest to be fixed by
the Trustee, notice whereof shall be given to Holders of Securities not less
than 10 days prior to such Special Record Date, or be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and upon such notice as may be
required by such exchange, all as more fully provided in said Indenture.

          The Company may, by Company Order, prior to the Scheduled Maturity
Date, extend the maturity date of the Securities no more than one time, for up
to an additional 19 years from the Scheduled Maturity Date, PROVIDED that at the
time of such extension (i) no Event of Default or event which after notice or
lapse of time, or both, would become an Event of Default specified in Section
501(5) or Section 501(6) shall have occurred and be continuing; (ii) the Company
has made timely payments of interest (including Additional Interest) on the
Securities during the immediately preceding 18 months without deferrals; (iii)
COMSAT Capital is not in arrears on payments of distributions on the Preferred
Securities; (iv) the Securities shall continue to pay Interest at least at a
rate equal to the rate of distributions that accrue on the Preferred Securities;
(v) the Securities are rated Investment Grade; and (vi) the final maturity of
the Securities is not later than the 49th anniversary of the date of issuance of
the Preferred Securities.

          COMSAT shall have the right at any time during the term of this
Security to extend the interest payment period from time to time to a period not
exceeding 60 consecutive months, during which periods interest will compound
monthly, and at the end of which periods COMSAT shall pay all interest then
accrued and unpaid (together with Additional Interest); PROVIDED that during any
such extended interest payment period COMSAT shall not declare or pay any
dividend on, or redeem, purchase, acquire or make a liquidation payment with
respect to, any of its capital stock (other than as a result of a
reclassification of such


                                      -16-

<PAGE>

capital stock or the exchange or conversion of one class or series of capital
stock for another class or series of capital stock), or make any guarantee
payments with respect to the foregoing (other than payments under the Parent
Guarantee).  Prior to the termination of any such extended interest payment
period, COMSAT may further extend the interest payment period, PROVIDED that
such extended interest payment period together with all such previous and
further extensions thereof may not exceed 60 consecutive months, nor may such
extended interest payment period extend the Stated Maturity of this Security.
After COMSAT has paid all accrued and unpaid interest (including Additional
Interest) following an extended interest payment period, it may again extend
interest payment periods for up to 60 consecutive months, subject to the
preceding sentence.  If COMSAT Capital shall be the sole Holder of the
Securities, COMSAT shall give COMSAT Capital notice of its selection of an
extended interest payment period one Business Day prior to the earlier of (i)
the date the dividends on the Preferred Securities are payable or (ii) the date
COMSAT Capital is required to give notice to the NYSE or other applicable self-
regulatory organization or to holders of the Preferred Securities of the record
date or the date such dividend is payable, but in any event not less than one
Business Day prior to such record date.  COMSAT shall cause COMSAT Capital to
give notice of COMSAT's selection of such extended interest payment period to
the holders of the Preferred Securities.  If COMSAT Capital is not the sole
Holder of the Securities, COMSAT shall give the Holders of the Securities notice
of its selection of such an extended interest payment period ten Business Days
prior to the earlier of (i) the Interest Payment Date or (ii) the date COMSAT is
required to give notice to the NYSE or other applicable self-regulatory
organization, or to the Holders of the Securities, of the record or payment date
of such related interest payment, but in any event not less than two Business
Days prior to such record date.

          Payment of the principal of and interest on this Security issued as a
global security will be made to DTC, as the depository for the Securities, in
such coin or currency of the United States of America as at the time of payment
is legal tender for payment of public and private debts.  If the Securities are
issued in certificated form, principal and interest will be payable, the
transfer of the Securities will be registrable and the Securities will be
exchangeable for Securities of other denominations of a like aggregate principal
amount at the corporate trust office of the Trustee in New York City; PROVIDED,
HOWEVER, that, unless the Securities are held by COMSAT Capital or any successor
permissible under the Limited Partnership Agreement (in which case payment shall
be made by wire transfer), payment of interest may, at the option of COMSAT, be
made by check mailed to the address of the Persons entitled thereto as such
address shall appear in the Security Register.

          Reference is hereby made to the further provisions of the Indenture
summarized on the reverse hereof, which further


                                      -17-

<PAGE>

provisions shall for all purposes have the same effect as if set forth at this
place.

          Unless the certificate of authentication hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

          IN WITNESS WHEREOF, COMSAT has caused this instrument to be duly
executed under its corporate seal.

Dated:                , 1995
       ---------------

                                        COMSAT Corporation


[SEAL]
                                        By:
                                            ------------------------------------
                                             Name:
                                             Title:


Attest:
          ---------------------

This Security was issued with original issue discount ("OID") within the meaning
of section 1273 of the Internal Revenue Code of 1986 and the regulations
thereunder.  The issue price of this Security is $[ ], OID with respect to this
Security is $[ ], the issue date is _________, 1995, and the yield to maturity
is [ ]%.


Section 203.        Form of Reverse of Security.

          This Security is one of a duly authorized issue of Securities of
COMSAT, designated as its ______% Junior Subordinated Deferrable Interest
Debentures Due _________, 2025 (subject to extension, as provided herein)
(herein called the "Securities"), limited in aggregate principal amount to
$206,200,000, issued and to be issued under an Indenture, dated as of
____________, 1995 (herein called the "Indenture"), between COMSAT and The First
National Bank of Chicago, as Trustee (herein called the "Trustee", which term
includes any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of
COMSAT, the Trustee, the Holders of the Securities, the holders of Preferred
Securities and the holders of Senior Indebtedness and of the terms upon which
the Securities are, and are to be, authenticated and delivered.  All terms used
in this Security which are defined in the Indenture or in the Limited
Partnership Agreement attached as Annex A thereto shall have the meanings
assigned to them in the Indenture or the Limited Partnership Agreement, as the
case may be.


                                      -18-

<PAGE>

          The indebtedness evidenced by this Security is, to the extent provided
in the Indenture, subordinate and subject in right of payment to the prior
payment in full of all Senior Indebtedness, and this Security is issued subject
to the provisions of the Indenture with respect thereto.  Each Holder of this
Security, by accepting the same, (a) agrees to and shall be bound by such
provisions, (b) authorizes and directs the Trustee on his behalf to take such
action as may be necessary or appropriate to effectuate the subordination so
provided and (c) appoints the Trustee his attorney-in-fact for any and all such
purposes.

          The Trustee or the Holders of not less than 25% in aggregate
outstanding principal amount of the Securities may declare the principal of and
interest (including any Additional Interest) on the Securities due and payable
immediately on default with respect to such Securities; PROVIDED, HOWEVER, that
after such acceleration, but before a judgment or decree based on acceleration,
the Holders of a majority in aggregate principal amount of outstanding
Securities may, under certain circumstances, rescind and annul such acceleration
if all Events of Default with respect to such Securities, other than the non-
payment of accelerated principal, have been cured or waived as provided in the
Indenture.

          The Indenture permits, with certain exceptions as therein provided,
COMSAT and the Trustee, with the consent of the Holders of not less than a
majority in principal amount of the Securities, to modify the Indenture or any
supplemental indenture affecting the Securities or the rights of the Holders of
Securities.  Any such consent by the Holder of this Security shall be conclusive
and binding upon such Holder and upon all future Holders of this Security and of
any Security issued upon the registration of transfer hereof or in exchange
herefor or in lieu hereof, whether or not notation of such consent is made upon
this Security.

          The Securities shall be subject to redemption at the option of COMSAT
without premium or penalty, in whole or in part, concurrent with the redemption
by COMSAT Capital of the Preferred Securities (if any Preferred Securities are
then outstanding), at any time or from time to time on or after ____________,
2000, as provided in the Indenture, upon not less than 30 days' nor more than 60
days' notice, at a Redemption Price equal to 100% of the principal amount to be
redeemed, plus any accrued and unpaid interest (including Additional Interest,
if any), to the Redemption Date, but interest installments whose Stated Maturity
is on or prior to such Redemption Date will be payable to the Holders of such
Securities of record at the close of business on the relevant Record Dates
referred to on the face hereof, all as provided in the Indenture.  The Company
has covenanted to exercise such right to redeem if COMSAT Capital redeems its
Preferred Securities.


                                      -19-

<PAGE>

          No reference herein to the Indenture and no provision of this Security
or of the Indenture shall alter or impair the obligation of COMSAT, which is
absolute and unconditional, to pay the principal of and interest on this
Security at the times, place and rate, and in the coin or currency, herein
prescribed.

          As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
corporate trust office of the Trustee in New York City, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to COMSAT
and the Security Registrar duly executed by the Holder hereof or his or her
attorney duly authorized in writing, and thereupon one or more new Securities,
of authorized denominations and for the same aggregate principal amount, will be
issued to the designated transferee or transferees.

          The Securities, if distributed to holders of Preferred Securities in a
dissolution of COMSAT Capital, will initially be issued as a global security.
If the Securities are issued in certificated form, such Securities will be
issued in denominations of $25 and integral multiples thereof.  As provided in
the Indenture and subject to certain limitations therein set forth, Securities
are exchangeable for a like aggregate principal amount of Securities of a
different authorized denomination, as requested by the Holder surrendering the
same.

          No service charge shall be made for any such registration of transfer
or exchange, but COMSAT may require payment of a sum sufficient to cover any tax
or other governmental charge payable in connection therewith.

          Prior to due presentment of this Security for registration of
transfer, COMSAT, the Trustee and any agent of COMSAT or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither COMSAT, the
Trustee nor any such agent shall be affected by notice to the contrary.

          The Indenture contains provisions for defeasance at any time of the
entire indebtedness of this Security upon compliance by COMSAT with certain
conditions set forth therein.


                                      -20-

<PAGE>

Section 204.        Form of Trustee's Certificate of Authentication.

          This is one of the Securities referred to in the within-mentioned
Indenture.


                                   The First National Bank of Chicago,
                                             as Trustee


                                   By:
                                       ------------------------------
                                             Authorized Officer


                                  ARTICLE THREE

                                 THE SECURITIES


Section 301.        Title and Terms.

          The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is $___________, except for
Securities authenticated and delivered upon registration of transfer of, or in
exchange for, or in lieu of, other Securities pursuant to Section 304, 305, 306
or 906.

          The Securities shall be known and designated as the "______% Junior
Subordinated Deferrable Interest Debentures Due ____________, 2025" of the
Company.  Their Stated Maturity shall be the earliest of ____________, 2025
(subject to extension, as provided herein) or, except in the event that (A) a
Tax Event or an Investment Company Event has occurred and the General Partner of
COMSAT Capital has elected to dissolve COMSAT Capital and cause the Securities
to be distributed to the holders of the Preferred Securities in liquidation of
COMSAT Capital as provided in Clauses (ii) or (iii) of Section 6.2(c) of the
Limited Partnership Agreement or (B) COMSAT Capital is consolidated,
amalgamated, merged with or into, or replaced by, or conveys, transfers or
leases its properties and assets as an entirety to, any corporation or other
body pursuant to Section 9.12 of the Limited Partnership Agreement, the date
upon which COMSAT Capital is dissolved, wound-up, liquidated or terminated
(other than any termination within the meaning of section 708(b)(1)(B) of the
Internal Revenue Code of 1986 or equivalent provision of subsequent law, which
termination does not constitute a termination of COMSAT Capital for any other
purpose), and they shall bear interest at the rate of ______% per annum, from
________, 1995 or from the most recent Interest Payment Date to which interest
has been paid or duly provided for, as the case may be, payable monthly, in
arrears, on the last day of each calendar month of each year, commencing
____________, 1995 until


                                      -21-

<PAGE>

the principal thereof is paid or made available for payment.  Interest will
compound monthly and will accrue at the annual rate of ______% on any interest
installment that is not paid when due or during an extension of an interest
payment period as set forth below in this Section 301.  In the event that any
date on which interest is payable on the Securities is not a Business Day, then
payment of the interest payable on such date will be made on the next succeeding
day which is a Business Day (and without any interest or other payment in
respect of any such delay), except that, if such Business Day is in the next
succeeding calendar year, such payment shall be made on the immediately
preceding Business Day, in each case with the same force and effect as if made
on such date.

          If at any time COMSAT Capital shall be required to pay any interest on
dividends in respect of the Preferred Securities pursuant to the terms thereof,
then the Company will pay as interest to COMSAT Capital as the holder of the
Securities Additional Interest.  In addition, if COMSAT Capital would be
required to pay any taxes, duties, assessments or governmental charges of
whatever nature (other than withholding taxes) imposed by the United States, or
any other taxing authority, then, in any such case, the Company also will pay as
Additional Interest such amounts as shall be required so that the net amounts
received and retained by COMSAT Capital after paying any such taxes, duties,
assessments or governmental charges will be not less than the amounts COMSAT
Capital would have received had no such taxes, duties, assessments or
governmental charges been imposed.  The obligations of the Company under this
paragraph shall survive any satisfaction and discharge or any defeasance
pursuant to Article Four hereof.

          The Company may, by Company Order, prior to the Scheduled Maturity
Date, extend the maturity date of the Securities no more than one time, for up
to an additional 19 years from the Scheduled Maturity Date, PROVIDED that at the
time of such extension (i) no Event of Default or event which after notice or
lapse of time, or both, would become an Event of Default specified in Section
501(5) or Section 501(6) shall have occurred and be continuing; (ii) the Company
has made timely payments of interest (including Additional Interest) on the
Securities during the immediately preceding 18 months without deferrals; (iii)
COMSAT Capital is not in arrears on payments of distributions on the Preferred
Securities; (iv) the Securities shall continue to pay Interest at least at a
rate equal to the rate of distributions that accrue on the Preferred Securities;
(v) the Securities are rated Investment Grade; and (vi) the final maturity of
the Securities is not later than the 49th anniversary of the date of issuance of
the Preferred Securities.

          The Company shall have the right, at any time during the term of the
Securities, to extend the interest payment period from time to time to a period
not exceeding 60 consecutive months, provided that during the period of any such
extension,


                                      -22-

<PAGE>

interest will continue to accrue and compound monthly.  At the end of any such
extended interest payment period, the Company shall pay all interest then
accrued and unpaid (together with Additional Interest thereon); PROVIDED that
during any such extended interest payment period COMSAT shall not declare or pay
any dividend on, or redeem, purchase, acquire or make a liquidation payment with
respect to, any of its capital stock (other than as a result of a
reclassification of such capital stock or the exchange or conversion of one
class or series of capital stock for another class or series of capital stock),
or make any guarantee payments with respect to the foregoing (other than
payments under the Parent Guarantee).  Prior to the termination of any such
extended interest payment period, the Company may further extend the interest
payment period, provided that such extended interest payment period together
with all such previous and further extensions thereof may not exceed 60
consecutive months and provided, further, that in no event shall any extension
of the interest payment period extend beyond the Stated Maturity of the
Securities.  After the Company has paid all accrued and unpaid interest
(including Additional Interest) following an extended interest payment period,
it may again extend interest payment periods for up to 60 consecutive months,
subject to the preceding sentence.  If COMSAT Capital shall be the sole Holder
of the Securities, COMSAT shall give COMSAT Capital notice of its selection of
an extended interest payment period one Business Day prior to the earlier of (i)
the date the dividends on the Preferred Securities are payable or (ii) the date
COMSAT Capital is required to give notice to the NYSE or other applicable self-
regulatory organization or to holders of the Preferred Securities of the record
date or the date such dividend is payable, but in any event not less than one
Business Day prior to such record date.  COMSAT shall cause COMSAT Capital to
give notice of COMSAT's selection of such extended interest payment period to
the holders of the Preferred Securities.  If COMSAT Capital is not the sole
Holder of the Securities, COMSAT shall give the Holders of the Securities notice
of its selection of such an extended interest payment period ten Business Days
prior to the earlier of (i) the Interest Payment Date or (ii) the date COMSAT is
required to give notice to the NYSE or other applicable self-regulatory
organization, or to the Holders of the Securities, of the record or payment date
of such related interest payment, but in any event not less than two Business
Days prior to such record date.

          The principal of and interest on the Securities issued as a global
security will be made to DTC, as the depository for the Securities.  The Trustee
or the Holders of not less than 25% in aggregate outstanding principal amount of
the Securities may declare the principal of and interest (including any
Additional Interest) on the Securities due and payable immediately on any Event
of Default; PROVIDED, HOWEVER, that after such acceleration, but before a
judgment or decree based on acceleration, the Holders of a majority in aggregate
principal amount of outstanding Securities may, under certain


                                      -23-

<PAGE>

circumstances, rescind and annul such acceleration if all Events of Default,
other than the non-payment of accelerated principal, have been cured or waived
as provided in the Indenture.  Unless the Holder of the Preferred Securities is
COMSAT Capital (in which case payment of interest shall be made by wire
transfer), payment of interest may be made, at the option of the Company, by
check mailed to the address of the Persons entitled thereto as such address
shall appear in the Security Register.

          The Securities shall be subordinated in right of payment to Senior
Indebtedness as provided in Article Eleven.

          The Securities shall be redeemable as provided in Article Twelve.


Section 302.        Denominations.

          The Securities, if distributed to holders of Preferred Securities in a
dissolution of COMSAT Capital, will initially be issued as a global security.
If the Securities are issued in certificated form, such Securities will be
issued only in registered form without coupons and only in denominations of $25
and integral multiples thereof.


Section 303.        Execution, Authentication, Delivery and Dating.

          The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its President or one of
its Vice Presidents, under its corporate seal reproduced thereon attested by its
Secretary or one of its Assistant Secretaries.  The signature of any of these
officers on the Securities may be manual or facsimile.

          Securities bearing the manual or facsimile signatures of individuals
who were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities executed by the Company to
the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities; and the Trustee in accordance
with such Company Order shall authenticate and deliver such Securities as in
this Indenture provided and not otherwise.

          Each Security shall be dated the date of its authentication.


                                      -24-

<PAGE>

          No Security shall be entitled to any benefit under this Indenture or
be valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder.


Section 304.        Temporary Securities.

          Pending the preparation of definitive Securities, the Company may
execute, and upon Company Order the Trustee shall authenticate and deliver,
temporary Securities which are printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, substantially of the
tenor of the definitive Securities in lieu of which they are issued and with
such appropriate insertions, omissions, substitutions and other variations as
the officers executing such Securities may determine, as evidenced by their
execution of such Securities.

          If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay.  After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at any office
or agency of the Company designated pursuant to Section 1002, without charge to
the Holder.  Upon surrender for cancellation of any one or more temporary
Securities, the Company shall execute and the Trustee shall authenticate and
deliver in exchange therefor a like principal amount of definitive Securities of
authorized denominations.  Until so exchanged the temporary Securities shall in
all respects be entitled to the same benefits under this Indenture as definitive
Securities.


Section 305.        Registration, Registration of Transfer and Exchange.

          The Company shall cause to be kept at the Corporate Trust Office of
the Trustee a register (the register maintained in such office and in any other
office or agency designated pursuant to Section 1002 being herein sometimes
collectively referred to as the "Security Register") in which, subject to such
reasonable regulations as it may prescribe, the Company shall provide for the
registration of Securities and of transfers of Securities.  The Trustee is
hereby appointed "Security Registrar" for the purpose of registering Securities
and transfers of Securities as herein provided.

          Upon surrender for registration of transfer of any Security at an
office or agency of the Company designated pursuant to Section 1002 for such
purpose, the Company shall


                                      -25-

<PAGE>

execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new Securities of any
authorized denominations and of a like aggregate principal amount.

          At the option of the Holder, Securities may be exchanged for other
Securities of any authorized denominations and of a like aggregate principal
amount, upon surrender of the Securities to be exchanged at such office or
agency.  Whenever any Securities are so surrendered for exchange, the Company
shall execute, and the Trustee shall authenticate and deliver, the Securities
which the Holder making the exchange is entitled to receive.

          All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company, evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

          Every Security presented or surrendered for registration of transfer
or for exchange shall (if so required by the Company or the Trustee) be duly
endorsed, or be accompanied by a written instrument of transfer, in form
satisfactory to the Company and the Security Registrar, duly executed by the
Holder thereof or his attorney duly authorized in writing.

          No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than (i)
exchanges pursuant to Section 304 or 906 not involving any transfer or (ii)
transfers contemplated by Section 6.2(c) or 9.12 of the Limited Partnership
Agreement.


Section 306.        Mutilated, Destroyed, Lost and Stolen Securities.

          If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of like tenor and principal amount and bearing a number
not contemporaneously Outstanding.

          If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired,by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of like tenor and


                                      -26-

<PAGE>

principal amount and bearing a number not contemporaneously outstanding.

          In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, pay such Security.

          Upon the issuance of any new Security under this Section, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

          Every new Security issued pursuant to this Section in lieu of any
destroyed, lost or stolen Security shall constitute an original additional
contractual obligation of the Company, whether or not the destroyed, lost or
stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately with
any and all other Securities duly issued hereunder.

          The provisions of this Section are exclusive and shall preclude (to
the extent lawful) all other rights and remedies with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities.


Section 307.        Payment of Interest; Interest Rights Preserved.

          Interest on any Security which is payable, and is punctually paid, on
any Interest Payment Date shall be paid to the Person in whose name that
Security (or one or more Predecessor Securities) is registered at the close of
business on the Regular Record Date for such interest, which shall be the
Business Day next preceding such Interest Payment Date; PROVIDED, HOWEVER, that
if the Securities shall not continue to remain in book-entry-only form, the
Company shall have the right to select record dates which shall be more than one
Business Day prior to the Interest Payment Date.

          Any interest on any Security which is payable, but is not punctually
paid or duly provided for, on any Interest Payment Date (herein called
"Defaulted Interest") shall forthwith cease to be payable to the Holder on the
relevant Regular Record Date by virtue of having been such Holder, and such
Defaulted Interest may be paid by the Company, at its election in each case, as
provided in Clause (1) or (2) below:

          (1)       The Company may elect to make payment of any Defaulted
Interest to the Persons in whose names the Securities (or their respective
Predecessor Securities) are registered at the close of business on a Special
Record Date for the payment of such Defaulted Interest, which shall be fixed in
the following


                                      -27-

<PAGE>

manner.  The Company shall notify the Trustee in writing of the amount of
Defaulted Interest proposed to be paid on each Security and the date of the
proposed payment, and at the same time the Company shall deposit with the
Trustee an amount of money equal to the aggregate amount proposed to be paid in
respect of such Defaulted Interest or shall make arrangements satisfactory to
the Trustee for such deposit prior to the date of the proposed payment, such
money when deposited to be held in trust for the benefit of the Persons entitled
to such Defaulted Interest as provided in this Clause.  Thereupon the Trustee
shall fix a Special Record Date for the payment of such Defaulted Interest which
shall be not more than 15 days and not less than 10 days prior to the date of
the proposed payment and not less than 10 days after the receipt by the Trustee
of the notice of the proposed payment.  The Trustee shall promptly notify the
Company of such Special Record Date and, in the name and at the expense of the
Company, shall cause notice of the proposed payment of such Defaulted Interest
and the Special Record Date therefor to be mailed, first-class postage prepaid,
to each Holder at his address as it appears in the Security Register, not less
than 10 days prior to such Special Record Date.  Notice of the proposed payment
of such Defaulted Interest and the Special Record Date therefor having been so
mailed, such Defaulted Interest shall be paid to the Persons in whose names the
Securities (or their respective Predecessor Securities) are registered at the
close of business on such Special Record Date and shall no longer be payable
pursuant to the following Clause (2).

          (2)       The Company may make payment of any Defaulted Interest in
any other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and, if so listed, upon such
notice as may be required by such exchange, if, after notice given by the
Company to the Trustee of the proposed payment pursuant to this Clause, such
manner of payment shall be deemed practicable by the Trustee.

          Subject to the foregoing provisions of this Section, each Security
delivered under this Indenture upon registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest accrued
and unpaid, and to accrue (including in each such case Additional Interest),
which were carried by such other Security.


Section 308.        Persons Deemed Owners.

          Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name such Security is registered as the owner of such
Security for the purpose of receiving payment of principal of and (subject to
Section 307) interest (including Additional Interest) on such Security and for
all other purposes whatsoever, whether or not


                                      -28-

<PAGE>

such Security be overdue, and neither the Company, the Trustee nor any agent of
the Company or the Trustee shall be affected by notice to the contrary.


Section 309.        Cancellation.

          All Securities surrendered for payment, redemption, registration of
transfer or exchange shall, if surrendered to any Person other than the Trustee,
be delivered to the Trustee and shall be promptly cancelled by it.  The Company
may at any time deliver to the Trustee for cancellation any Securities
previously authenticated and delivered hereunder which the Company may have
acquired in any manner whatsoever, and all Securities so delivered shall be
promptly cancelled by the Trustee.  No Securities shall be authenticated in lieu
of or in exchange for any Securities cancelled as provided in this Section,
except as expressly permitted by this Indenture.  All cancelled Securities held
by the Trustee shall be disposed of as directed by a Company Order.


Section 310.        Computation of Interest.

          Interest on the Securities shall be computed on the basis of a 360-day
year of twelve 30-day months and, for any period shorter than a full monthly
interest period, shall be computed on the basis of the actual number of days
elapsed in such period.


                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE


Section 401.        Satisfaction and Discharge of Indenture.

          This Indenture shall cease to be of further effect (except as to any
surviving rights of registration of transfer or exchange of Securities herein
expressly provided for, as to the obligations of the Company pursuant to
Sections 306, 402, 1002 and 1003, and as to the obligation of the Company to pay
Additional Interest when due), and the Trustee, on demand of and at the expense
of the Company, shall execute proper instruments acknowledging satisfaction and
discharge of this Indenture, when

          (1)       either

                    (A)   all Securities theretofore authenticated and delivered
          (other than (i) Securities which have been destroyed, lost or stolen
          and which have been replaced or paid as provided in Section 306 and
          (ii) Securities


                                      -29-

<PAGE>

          for whose payment money has theretofore been deposited in trust or
          segregated and held in trust by the Company and thereafter repaid to
          the Company or discharged from such trust, as provided in Section
          1003) have been delivered to the Trustee for cancellation; or

                    (B)   all such Securities not theretofore delivered to the
          Trustee for cancellation

                        (i)   have become due and payable, or

                        (ii)  will become due and payable at their Stated
                    Maturity within one year, or

                        (iii) are to be called for redemption within one year
                    under arrangements satisfactory to the Trustee for the
                    giving of notice of redemption by the Trustee in the name,
                    and at the expense, of the Company and the Company, in the
                    case of (i), (ii) or (iii) above, has deposited or caused to
                    be deposited with the Trustee as trust funds in trust for
                    the purpose an amount sufficient to pay and discharge the
                    entire indebtedness on such Securities not theretofore
                    delivered to the Trustee for cancellation, for principal and
                    interest (including Additional Interest) to the date of such
                    deposit (in the case of Securities which have become due and
                    payable) or to the Stated Maturity or Redemption Date, as
                    the case may be;

          (2)       the Company has paid or caused to be paid all other sums
payable hereunder by the Company; and


          (3)       the Company has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent herein provided for relating to the satisfaction and discharge of this
Indenture have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 607 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of Clause (1) of
this Section or if money and/or U.S. Government Obligations shall have been
deposited with the Trustee pursuant to Section 403, the obligations of the
Trustee under Section 402 and the last paragraph of Section 1003 shall survive.


Section 402.        Application of Trust Money.

          Subject to the provisions of the last paragraph of Section 1003, all
money deposited with the Trustee pursuant to


                                      -30-

<PAGE>

Section 401, all money and/or U.S. Government Obligations deposited with the
Trustee pursuant to Section 403, and all money received by the Trustee in
respect of U.S. Government Obligations deposited with the Trustee pursuant to
Section 403 shall be held in trust and applied by it, in accordance with the
provisions of the Securities and this Indenture, to the payment, either directly
or through any Paying Agent (including the Company acting as its own Paying
Agent) as the Trustee may determine, to the Persons entitled thereto, of the
principal and interest, if any, for whose payment such money has been deposited
with the Trustee.

          The Trustee shall deliver or pay to the Company from time to time upon
Company Request any money and/or U.S. Government Obligations held by it as
provided in Section 402 or in Section 403 which, in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee, are then in excess of the amount
thereof which then would have been required to be deposited for the purpose for
which such money and/or U.S. Government Obligations were deposited or received.

Section 403.        Defeasance and Discharge of Indenture.

          (1)       Notwithstanding the provisions of Section 401 but subject to
Section 403(2), the Company shall have the option, to be exercised by Board
Resolution, to pay and discharge the entire indebtedness on all the Outstanding
Securities; PROVIDED that the following conditions have been satisfied:

                    (A)  the Company shall have irrevocably deposited in trust
with the Trustee as trust funds, for the purpose of making the following
payments, specifically pledged as security for, and dedicated solely to, the
benefit of Holders of Securities, money and/or U.S. Government Obligations for
the payment of principal and each installment of interest on the Securities on
their respective Stated Maturities, in accordance with this Indenture and the
Securities;

                    (B)  the Company shall have delivered to the Trustee a
certificate (addressed to the Trustee) from a nationally recognized firm of
independent certified public accountants expressing their opinion that the
payment of principal and interest when due and without reinvestment on the
deposited U.S. Government Obligations plus any deposited money without
investment will provide cash at such times and in such amounts (but, in the case
of the option to defease the debt in its entirety only, not more than such
amounts) as will be sufficient to pay principal and each installment of interest
on all the Outstanding Securities on their respective Stated Maturities, in
accordance with this Indenture and the Securities;

                    (C)  91 days pass after the deposit is made or, if longer,
the day following the expiration of the longest


                                      -31-

<PAGE>

preference period applicable to the Company in respect of such deposit occurs
(it being understood that the condition in this clause (C) is a condition
subsequent and shall not be deemed satisfied until the expiration of such
period), and during such period no Event of Default or event which after notice
or lapse of time, or both, would become an Event of Default specified in Section
501(5) or Section 501(6) occurs which is continuing at the end of the period;

                    (D)  no Event of Default or event which after notice or
lapse of time, or both, would become an Event of Default has occurred and is
continuing on the date of such deposit and after giving effect thereto;

                    (E)  the exercise of the defeasance options does not
constitute a default under, or a breach or violation of, this Indenture or any
other agreement or instrument to which the Company is a party or by which it is
bound;

                    (F)  the Company delivers to the Trustee an Opinion of
Counsel to the effect that the trust resulting from the deposit does not
constitute, or is qualified as, a regulated investment company under the
Investment Company Act of 1940;

                    (G)  the Company delivers to the Trustee an Opinion of
Counsel to the effect that the Company has received from, or there has been
published by, the United States Internal Revenue Service a ruling, or since the
date of this Indenture there has been a change in tax law in either case to the
effect that, and based thereon such opinion will confirm that, holders of
Securities will not recognize gain or loss for federal income tax purposes as a
result of such deposit, defeasance and discharge and will be subject to federal
income tax on the same amount, in the same manner and at the same time as would
have been the case if such deposit, defeasance and discharge was not to occur;

                    (H)  the Company shall have delivered to the Trustee an
Officers' Certificate to the effect that such defeasance shall not cause any
Securities then listed on any registered national securities exchange under the
Securities Exchange Act of 1934, as amended, to be delisted;

                    (I)  such defeasance shall not cause the Trustee for the
Securities to have a conflicting interest as specified in Section 608 or for the
purposes of the Trust Indenture Act with respect to any securities of the
Company;

                    (J)  the Company shall have delivered to the Trustee an
Officers' Certificate and an Opinion of Counsel, each stating that all
conditions precedent and subsequent to the defeasance and discharge of the
entire indebtedness on all Outstanding Securities as contemplated by this
Section 403 have been complied with;


                                      -32-

<PAGE>

                    (K)       at the time of such deposit:  (i) no default in
the payment of all or a portion of principal of (or premium, if any) or interest
on any Senior Indebtedness shall have occurred and be continuing, and no event
of default with respect to any Senior Indebtedness shall have occurred and be
continuing and shall have resulted in such Senior Indebtedness becoming or being
declared due and payable prior to the date on which it would otherwise have
become due and payable and (ii) no other event of default with respect to any
Senior Indebtedness shall have occurred and be continuing permitting (after
notice or the lapse of time, or both) the holders of such Senior Indebtedness
(or a trustee on behalf of the holders thereof) to declare such Senior
Indebtedness due and payable prior to the date on which it would otherwise have
become due and payable, or, in the case of either Clause (i) or Clause (ii)
above, each such default or event of default shall have been cured or waived or
shall have ceased to exist; and

                    (L)       Such defeasance shall not result in the trust
arising from such deposit constituting an investment company as defined in the
Investment Company Act of 1940, as amended, or such trust shall be qualified
under such act or exempt from regulation thereunder.

          (2)       Provided that all the conditions referred to in Clauses (A)
through (L) of Section 403(1) have been satisfied, all of the provisions of this
Indenture as they relate to the Outstanding Securities (except the provisions
relating to (i) the rights of Holders of Securities to receive, from the trust
funds described in Clause (A) of Section 403(1), payment of the principal of and
any installment of interest on such Securities on the Stated Maturity or
Redemption Date, as the case may be, of such principal or installment of
interest in accordance with the terms of this Indenture and of the Securities,
(ii) the Company's obligations with respect to such Securities under Section
304, Section 305, Section 306, Section 1002 and Section 1003 of this Indenture,
(iii) the rights, powers, trusts, duties, and immunities of the Trustee under
this Indenture, (iv) the Company's obligations to pay Additional Interest as
and when due in accordance with the terms of this Indenture and the Securities,
and (v) this Article Four) shall no longer be in effect with respect to the
Securities, and the Trustee, at the expense of the Company, shall, upon Company
Request, execute proper instruments acknowledging the same.


Section 404.  Reinstatement.

          If the Trustee or any Paying Agent shall be unable to apply any money
or U.S. Government Obligations in accordance with Section 401 or Section 403 by
reason of any legal proceeding or by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, the Company's obligations under the Securities and


                                      -33-

<PAGE>

under this Indenture with respect thereto shall be revived and reinstated as
though no deposit had occurred pursuant to Section 401 or Section 403, until
such time as the Trustee or such Paying Agent shall be permitted to apply all
such money or obligations in accordance with Section 401 or Section 403,
PROVIDED, HOWEVER, that if the Company shall have made any payment of principal
of or interest on any Securities because of the reinstatement of its
obligations, the Company shall be subrogated to the rights of the Holders of
such Securities to receive such payment from the money or U.S. Government
Obligations held by the Trustee or such Paying Agent.


                                  ARTICLE FIVE

                                    REMEDIES


Section 501.        Events of Default.

          "Event of Default", wherever used herein, means any one of the
following events (whatever the reason for such Event of Default and whether it
shall be occasioned by the provisions of Article Eleven or be voluntary or
involuntary or be effected by operation of law or pursuant to any judgment,
decree or order of any court or any order, rule or regulation of any
administrative or governmental body):

          (1)       failure for 10 days to pay any interest on the Securities,
including any Additional Interest in respect thereof, when due; PROVIDED that a
valid extension of the interest payment period by the Company pursuant to this
Indenture shall not constitute a default in the payment of interest for this
purpose; or

          (2)       failure to pay any principal or premium, if any, on the
Securities when due, whether at maturity, upon redemption by declaration or
otherwise; or

          (3)       failure by the Company to observe or perform any other
covenant contained herein for a period of 90 days after written notice to the
Company from any Holder of the Securities or any holder of Preferred Securities;
or

          (4)       the dissolution, winding up, or termination (other than any
termination within the meaning of section 708(b)(1)(B) of the Internal Revenue
Code of 1986 or equivalent provision of subsequent law, which termination does
not constitute a termination of COMSAT Capital for any other purpose) of COMSAT
Capital, except in connection with the distribution of Securities to the holders
of Preferred Securities in liquidation of COMSAT Capital pursuant to Section
6.2(c) or 9.12 of the Limited Partnership Agreement and in connection with
certain mergers,


                                      -34-

<PAGE>

consolidations or amalgamations permitted by Section 9.12 of the Limited
Partnership Agreement; or

          (5)       entry by a court having jurisdiction in the premises of (A)
a decree or order for relief in respect of the Company in an involuntary case or
proceeding under any applicable Federal or State bankruptcy, insolvency,
reorganization or other similar law or (B) a decree or order adjudging the
Company a bankrupt or insolvent, or approving as properly filed a petition
seeking reorganization, arrangement, adjustment or composition of or in respect
of the Company under any applicable Federal or State law, or appointing a
custodian, receiver, liquidator, assignee, trustee, sequestrator or other
similar official of the Company or of any substantial part of the property of
either, or ordering the winding up or liquidation of its affairs, and the
continuance of any such decree or order for relief or any such other decree or
order unstayed and in effect for a period of 60 consecutive days; or

          (6)       the commencement by the Company of a voluntary case or
proceeding under any applicable Federal or State bankruptcy, insolvency,
reorganization or other similar law or of any other case or proceeding to be
adjudicated a bankrupt or insolvent, or the consent by the Company to the entry
of a decree or order for relief in respect of itself in an involuntary case or
proceeding under any applicable Federal or State bankruptcy, insolvency,
reorganization or other similar law or to the commencement of any bankruptcy or
insolvency case or proceeding against the Company, or the filing by the Company
of a petition or answer or consent seeking reorganization or relief under any
applicable Federal or State law, or the consent by the Company to the filing of
such petition or to the appointment of or taking possession by a custodian,
receiver, liquidator, assignee, trustee, sequestrator or other similar official
of the Company or of any substantial part of the property of the Company, or the
making by the Company of an assignment for the benefit of creditors, or the
admission by the Company in writing of its inability to pay its debts generally
as they become due, or the taking of corporate action by the Company the Company
in furtherance of any such action.


Section 502.        Acceleration of Maturity; Rescission and Annulment.

          If an Event of Default occurs and is continuing, then and in every
such case, the Trustee or the Holders of not less than 25% in principal amount
of the Outstanding Securities may declare the principal of, premium, if any, and
interest (including any Additional Interest) on the Securities due and payable
immediately, by a notice in writing to the Company (and to the Trustee if given
by Holders), and upon any such declaration, such principal, premium, if any, and
all accrued interest shall become immediately due and payable; PROVIDED,


                                      -35-

<PAGE>

HOWEVER, that after such acceleration, but before a judgment or decree based on
acceleration, the Holders of a majority in aggregate principal amount of
Outstanding Securities, by written notice to the Company and the Trustee, may
rescind and annul such acceleration if

          (1)       the Company has paid or deposited with the Trustee a sum
sufficient to pay

                    (A)   all overdue interest (including any Additional
          Interest) on all Securities,

                    (B)   the principal of any Securities which have become due
          otherwise than by such declaration of acceleration and interest
          thereon at the rate borne by the Securities,

                    (C)   to the extent that payment of such interest is lawful,
          interest upon overdue interest at the rate borne by the Securities,
          and

                    (D)   all sums paid or advanced by the Trustee hereunder and
          the reasonable compensation, expenses, disbursements and advances of
          the Trustee, its agents and counsel;

and

          (2)       all Events of Default, other than the non-payment of the
principal of Securities which have become due solely by such declaration of
acceleration, have been cured or waived as provided in Section 513.

          No such rescission shall affect any subsequent default or impair any
right consequent thereon.


Section 503.        Collection of Indebtedness and Suits for Enforcement by
                    Trustee.

          The Company covenants that if

          (1)       default is made in the payment of any interest (including
any Additional Interest) on any Security when such interest becomes due and
payable and such default continues for a period of 30 days, or

          (2)       default is made in the payment of the principal of any
Security at the Maturity thereof,

the Company will, upon demand of the Trustee, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and interest (including any Additional Interest), and,
to the extent that


                                      -36-

<PAGE>

payment thereof shall be legally enforceable, interest on any overdue principal
and on any overdue interest (including any Additional Interest), at the rate
borne by the Securities, and, in addition thereto, such further amount as shall
be sufficient to cover the costs and expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel.

          If an Event of Default occurs and is continuing, the Trustee may in
its discretion proceed to protect and enforce its rights and the rights of the
Holders by such appropriate judicial proceedings as the Trustee shall deem most
effectual to protect and enforce any such rights, whether for the specific
enforcement of any covenant or agreement in this Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.


Section 504.        Trustee May File Proofs of Claim.

          In case of any judicial proceeding relative to the Company (or any
other obligor upon the Securities), its property or its creditors, the Trustee
shall be entitled and empowered, by intervention in such proceeding or
otherwise, to take any and all actions authorized under the Trust Indenture Act
in order to have claims of the Holders and the Trustee allowed in any such
proceeding.  In particular, the Trustee shall be authorized to collect and
receive any moneys or other property payable or deliverable on any such claims
and to distribute the same; and any custodian, receiver, assignee, trustee,
liquidator, sequestrator or other similar official in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the
Trustee and, in the event that the Trustee shall consent to the making of such
payments directly to the Holders, to pay to the Trustee any amount due it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 607.

          No provision of this Indenture shall be deemed to authorize the
Trustee to authorize or consent to or accept or adopt on behalf of any Holder
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any Holder thereof or to authorize the Trustee to
vote in respect of the claim of any Holder in any such proceeding.


Section 505.        Trustee May Enforce Claims Without Possession of Securities.

          All rights of action and claims under this Indenture or the Securities
may be prosecuted and enforced by the Trustee without the possession of any of
the Securities or the production


                                      -37-

<PAGE>

thereof in any proceeding relating thereto, and any such proceeding instituted
by the Trustee shall be brought in its own name as trustee of an express trust,
and any recovery of judgment shall, after provision for the payment of the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel, be for the ratable benefit of the Holders of the
Securities in respect of which such judgment has been recovered.


Section 506.        Application of Money Collected.

          Subject to Article Eleven, any money collected by the Trustee pursuant
to this Article shall be applied in the following order, at the date or dates
fixed by the Trustee and, in case of the distribution of such money on account
of principal, premium, if any, or interest (including any Additional Interest),
upon presentation of the Securities and the notation thereon of the payment if
only partially paid and upon surrender thereof if fully paid:

          First:    To the payment of all amounts due the Trustee under Section
607; and

          Second:   To the payment of the amounts then due and unpaid for
principal of and interest (including any Additional Interest) on the Securities
in respect of which or for the benefit of which such money has been collected,
ratably, without preference or priority of any kind, according to the amounts
due and payable on such Securities for principal and interest (including any
Additional Interest), respectively.


Section 507.        Limitation on Suits.

          No Holder of any Security will have any right to institute any
proceeding with respect to this Indenture, or for any remedy hereunder, unless

          (1)       such Holder shall have previously given written notice to
the Trustee of a continuing Event of Default;

          (2)       if COMSAT Capital is not the sole Holder of Securities, the
Holders of at least 25% in aggregate principal amount of the Outstanding
Securities shall have made written request to the Trustee to institute such
proceedings in respect of such Event of Default in its own name as Trustee
hereunder;

          (3)       such Holder or Holders shall have offered to the Trustee
reasonable indemnity against the costs, expenses and liabilities to be incurred
in compliance with such request;

          (4)       the Trustee shall not have received from the Holders of a
majority in aggregate principal amount of the


                                      -38-

<PAGE>

Outstanding Securities a direction inconsistent with such written request; and

          (5)       the Trustee, for 60 days after its receipt of such notice,
request and offer of indemnity, has failed to institute any such proceeding;

it being understood and intended that no one or more Holders shall have any
right in any manner whatever by virtue of, or by availing of, any provision of
this Indenture to affect, disturb or prejudice the rights of any other Holders,
or to obtain or to seek to obtain priority or preference over any other Holders
or to enforce any right under this Indenture, except in the manner herein
provided and for the equal and ratable benefit of all the Holders.  However, the
limitations contained in the previous sentence do not apply to a suit instituted
by a Holder of a Security for enforcement of payment of principal of or interest
on such Security on or after the respective due dates expressed in such
Security.


Section 508.        Unconditional Right of Holders to Receive Principal and
                    Interest.

          Notwithstanding any other provision in this Indenture, the Holder of
any Security shall have the right, which is absolute and unconditional, to
receive payment of the principal of and (subject to Section 307) interest
(including any Additional Interest) on such Security on the respective Stated
Maturities expressed in such Security (or, in the case of redemption, on the
Redemption Date) and to institute suit for the enforcement of any such payment,
and such rights shall not be impaired without the consent of such Holder.


Section 509.        Restoration of Rights and Remedies.

          If the Trustee or any Holder has instituted any proceeding to enforce
any right or remedy under this Indenture and such proceeding has been
discontinued or abandoned for any reason, or has been determined adversely to
the Trustee or to such Holder, then and in every such case, subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored severally and respectively to their former positions hereunder and
thereafter all rights and remedies of the Trustee and the Holders shall continue
as though no such proceeding had been instituted.


Section 510.        Rights and Remedies Cumulative.

          Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities in the last paragraph
of Section 306, no right or


                                      -39-

<PAGE>

remedy herein conferred upon or reserved to the Trustee or to the Holders is
intended to be exclusive of any other right or remedy, and every right and
remedy shall, to the extent permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or otherwise.  The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.


Section 511.        Delay or Omission Not Waiver.

          No delay or omission of the Trustee or of any Holder of any Security
to exercise any right or remedy accruing upon any Event of Default shall impair
any such right or remedy or constitute a waiver of any such Event of Default or
an acquiescence therein.  Every right and remedy given by this Article or by law
to the Trustee or to the Holders may be exercised from time to time, and as
often as may be deemed expedient, by the Trustee or by the Holders, as the case
may be.


Section 512.        Control by Holders.

          The Holders of a majority in aggregate principal amount of the
Outstanding Securities shall have the right to direct the time, method and place
of conducting any proceeding for any remedy available to the Trustee or
exercising any trust or power conferred on the Trustee, PROVIDED that

          (1)       such direction shall not be in conflict with any rule of law
or with this Indenture;

          (2)       subject to the provisions of Section 601, the Trustee shall
have the right to decline to follow any such direction if the Trustee determines
that the action so directed may not be lawfully taken, or if a Responsible
Officer or Officers determines that the action so directed would be unjustly
prejudicial to the Holders of Securities not taking part in such direction or
would involve the Trustee in personal liability; and

          (3)       the Trustee may take any other action deemed proper by the
Trustee which is not inconsistent with such direction.


Section 513.        Waiver of Past Defaults.

          Subject to Section 1006 hereof, the holders of not less than a
majority in aggregate outstanding principal amount of the Securities may, on
behalf of the holders of all the Securities, waive any past default hereunder
and its consequences, except a default


                                      -40-

<PAGE>

          (1)       in the payment of the principal or interest (including any
Additional Interest) on any Security; or

          (2)       in respect of a covenant or provision hereof which under
Article Nine cannot be modified or amended without the consent of the Holder of
each Outstanding Security affected.

          Upon any such waiver, such default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been cured, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon.


Section 514.        Undertaking for Costs.

          In any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; PROVIDED, that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company or in any suit for the
enforcement of the right to receive the principal of and interest (including any
Additional Interest) on any Security.


Section 515.        Waiver of Stay or Extension 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 wherever enacted,
now or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) 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 Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.


                                      -41-

<PAGE>

                                   ARTICLE SIX

                                   THE TRUSTEE


Section 601.        Certain Duties and Responsibilities.

          The Trustee, prior to the occurrence of an Event of Default with
respect to Securities and after the curing of all Events of Default with respect
to Securities which may have occurred, shall undertake to perform with respect
to Securities only such duties as are specifically set forth in this Indenture
and no implied covenants shall be read into this Indenture against the Trustee.
In case an Event of Default with respect to Securities has occurred (which has
not been cured or waived), the Trustee shall exercise with respect to Securities
such of the rights and powers vested in it by this Indenture, and use the same
degree of care and skill in their exercise, as a prudent individual would
exercise or use under the circumstances in the conduct of his or her own
affairs.

          No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act, or its own willful misconduct, except that:

          (a)       prior to the occurrence of an Event of Default with respect
to Securities and after the curing or waiving of all such Events of Default
which may have occurred:

          (1)       the duties and obligations of the Trustee shall with respect
to the Securities be determined solely by the express provisions of this
Indenture, and the Trustee shall not be liable with respect to such Securities
except for the performance of such duties and obligations as are specifically
set forth in this Indenture, and no implied covenants or obligations shall be
read into this Indenture against the Trustee; and

          (2)       in the absence of bad faith on the part of the Trustee, the
Trustee may conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon any certificates or opinions
furnished to the Trustee and conforming to the requirements of this Indenture;
but in the case of any such certificates or opinions which by any provision
hereof are specifically required to be furnished to the Trustee, the Trustee
shall be under a duty to examine the same to determine whether or not they
conform to the requirements of this Indenture;

          (b)       the Trustee shall not be liable for any error of judgment
made in good faith by a Responsible Officer or Responsible Officers of the
Trustee, unless it shall be proved


                                      -42-

<PAGE>

that the Trustee was negligent in ascertaining the pertinent facts;

          (c)       the Trustee shall not be liable with respect to any action
taken or omitted to be taken by it in good faith in accordance with the
direction of the Holders of not less than a majority in principal amount of the
Securities at the time Outstanding relating to the time, method and place of
conducting any proceeding for any remedy available to the Trustee, or exercising
any trust or power conferred upon the Trustee under this Indenture with respect
to the Securities; and

          (d)       none of the provisions contained in this Indenture shall
require the Trustee to expend or risk its own funds or otherwise incur personal
financial liability in the performance of any of its duties or in the exercise
of any of its rights or powers, if it shall have reasonable grounds for
believing that the repayment of such funds or liability is not reasonably
assured to it under the terms of this Indenture or adequate indemnity against
such risk is not reasonably assured to it.


Section 602.        Notice of Defaults.

          The Trustee shall give the Holders notice of any default hereunder as
and to the extent provided by the Trust Indenture Act; PROVIDED, HOWEVER, that
in the case of any default of the character specified in Section 501(3), no such
notice to Holders shall be given until at least 60 days after the occurrence
thereof.  For the purpose of this Section, the term "default" means any event
which is, or after notice or lapse of time or both would become, an Event of
Default.


Section 603.        Certain Rights of Trustee.

          Subject to the provisions of Section 601:

          (1)       the Trustee may rely and shall be protected in acting or
refraining from acting upon any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, other evidence of indebtedness or other paper or document believed by it
to be genuine and to have been signed or presented by the proper party or
parties;

          (2)       any request or direction of the Company mentioned herein
shall be sufficiently evidenced by a Company Request or Company Order and any
resolution of the Board of Directors may be sufficiently evidenced by a Board
Resolution;

          (3)       whenever in the administration of this Indenture the Trustee
shall deem it desirable that a matter be proved or


                                      -43-

<PAGE>

established prior to taking, suffering or omitting any action hereunder, the
Trustee (unless other evidence be herein specifically prescribed) may, in the
absence of bad faith on its part, rely upon an Officers' Certificate;

          (4)       the Trustee may consult with counsel and the written advice
of such counsel or any Opinion of Counsel shall be full and complete
authorization and protection in respect of any action taken, suffered or omitted
by it hereunder in good faith and in reliance thereon;

          (5)       the Trustee shall be under no obligation to exercise any of
the rights or powers vested in it by this Indenture at the request or direction
of any of the Holders pursuant to this Indenture, unless such Holders shall have
offered to the Trustee reasonable indemnity against the costs, expenses and
liabilities which might be incurred by it in compliance with such request or
direction;

          (6)       the Trustee shall not be bound to make any investigation
into the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, direction, consent, order, bond,
debenture, note, other evidence of indebtedness or other paper or document, but
the Trustee, in its discretion, may make such further inquiry or investigation
into such facts or matters as it may see fit, and, if the Trustee shall
determine to make such further inquiry or investigation, it shall be entitled to
examine the books, records and premises of the Company, personally or by agent
or attorney; and

          (7)       the Trustee may execute any of the trusts or powers
hereunder or perform any duties hereunder either directly or by or through
agents or attorneys and the Trustee shall not be responsible for any misconduct
or negligence on the part of any agent or attorney appointed with due care by it
hereunder.


Section 604.        Not Responsible for Recitals or Issuance of Securities.

          The recitals contained herein and in the Securities, except the
Trustee's certificates of authentication, shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture or of the Securities.  The Trustee shall not be accountable for the
use or application by the Company of Securities or the proceeds thereof.


                                      -44-

<PAGE>

Section 605.        May Hold Securities.

          The Trustee, any Paying Agent, any Security Registrar or any other
agent of the Company, in its individual or any other capacity, may become the
owner or pledgee of Securities and, subject to Sections 608 and 613, may
otherwise deal with the Company with the same rights it would have if it were
not Trustee, Paying Agent, Security Registrar or such other agent.


Section 606.        Money Held in Trust.

          Money held by the Trustee in trust hereunder need not be segregated
from other funds except to the extent required by law.  The Trustee shall be
under no liability for interest on any money received by it hereunder except as
otherwise provided herein or agreed with the Company.


Section 607.        Compensation and Reimbursement.

          The Company agrees

          (1)       to pay to the Trustee from time to time reasonable
compensation for all services rendered by it hereunder (which compensation shall
not be limited by any provision of law in regard to the compensation of a
trustee of an express trust);

          (2)       except as otherwise expressly provided herein, to reimburse
the Trustee upon its request for all reasonable expenses, disbursements and
advances incurred or made by the Trustee in accordance with any provision of
this Indenture (including the reasonable compensation and the expenses and
disbursements of its agents and counsel), except any such expense disbursement
or advance as may be attributable to its negligence or bad faith; and

          (3)       to indemnify the Trustee for, and to hold it harmless
against, any loss, liability or expense incurred without negligence or bad faith
on its part, arising out of or in connection with the acceptance or
administration of this trust, including the costs and expenses of defending
itself against any claim or liability in connection with the exercise or
performance of any of its powers or duties hereunder.


Section 608.        Disqualification; Conflicting Interests.

          If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.


                                      -45-

<PAGE>

Section 609.        Corporate Trustee Required; Eligibility.

          There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such and
has a combined capital and surplus of at least $50,000,000.  If such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of said supervising or examining authority, then for the purposes
of this Section, the combined capital and surplus of such Person shall be deemed
to be its combined capital and surplus as set forth in its most recent report of
condition so published.  If at any time the Trustee shall cease to be eligible
in accordance with the provisions of this Section, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article.


Section 610.        Resignation and Removal; Appointment of Successor.

          (a)       No resignation or removal of the Trustee and no appointment
of a successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee under Section 611.

          (b)       The Trustee may resign at any time by giving written notice
thereof to the Company.  If an instrument of acceptance by a successor Trustee
shall not have been delivered to the Trustee within 30 days after the giving of
such notice of resignation, the resigning Trustee may petition any court of
competent jurisdiction for the appointment of a successor Trustee.

          (c)       The Trustee may be removed at any time by Act of the Holders
of a majority in principal amount of the Outstanding Securities, delivered to
the Trustee and to the Company.

          (d)       If at any time:

                    (1)   the Trustee shall fail to comply with Section 608
          after written request therefor by the Company or by any Holder who has
          been a bona fide Holder of a Security for at least six months, or

                    (2)   the Trustee shall cease to be eligible under Section
          609 and shall fail to resign after written request therefor by the
          Company or by any such Holder, or

                    (3)   the Trustee shall become incapable of acting or shall
          be adjudged a bankrupt or insolvent or a receiver of the Trustee or of
          its property shall be appointed or any public officer shall take
          charge or control of the Trustee or of its property or affairs


                                      -46-

<PAGE>

          for the purpose of rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 514, any Holder who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee.

          (e)       If the Trustee shall resign, be removed or become incapable
of acting, or if a vacancy shall occur in the office of Trustee for any cause,
the Company, by a Board Resolution, shall promptly appoint a successor Trustee
if, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee shall be appointed by Act of the
Holders of a majority in principal amount of the Outstanding Securities
delivered to the Company and the retiring Trustee, the successor Trustee so
appointed shall, forthwith upon its acceptance of such appointment, become the
successor Trustee and supersede the successor Trustee appointed by the Company.
If no successor Trustee shall have been so appointed by the Company or the
Holders and accepted appointment in the manner hereinafter provided, any Holder
who has been a bona fide Holder of a Security for at least six months may, on
behalf of himself and all others similarly situated, petition any court of
competent jurisdiction for the appointment of a successor Trustee.

          (f)       The Company shall give notice of each resignation and each
removal of the Trustee and each appointment of a successor Trustee to all
Holders in the manner provided in Section 106.  Each notice shall include the
name of the successor Trustee and the address of its Corporate Trust Office.


Section 611.        Acceptance of Appointment by Successor.

          Every successor Trustee appointed hereunder shall execute, acknowledge
and deliver to the Company and to the retiring Trustee an instrument accepting
such appointment, and thereupon the resignation or removal of the retiring
Trustee shall become effective and such successor Trustee, without any further
act, deed or conveyance, shall become vested with all the rights, powers, trusts
and duties of the retiring Trustee; PROVIDED that, on request of the Company or
the successor Trustee, such retiring Trustee shall, upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights, powers and trusts of the retiring Trustee and shall duly assign,
transfer and deliver to such successor trustee all property and money held by
such retiring Trustee hereunder.  Upon request of any such successor Trustee,
the Company shall execute any and all Instruments for


                                      -47-

<PAGE>

more fully and certainly vesting in and confirming to such successor Trustee all
such rights, powers and trusts.

          No successor Trustee shall accept its appointment unless at the time
of such acceptance such successor Trustee shall be qualified and eligible under
this Article.


Section 612.        Merger, Conversion, Consolidation or Succession to Business.

          Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
of the Trustee, shall be the successor of the Trustee hereunder, PROVIDED that
such corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto.  In case any Securities shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.


Section 613.        Preferential Collection of Claims Against Company.

          If and when the Trustee shall be or become a creditor of the Company
(or any other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY


Section 701.        Company to Furnish Trustee Names and Addresses of Holders.

          The Company will furnish or cause to be furnished to the Trustee

          (a)       semiannually, not later than ________ 15 and ________ 15 in
each year, a list, in such form as the Trustee may reasonably require, of the
names and addresses of the Holders as


                                      -48-

<PAGE>

of a date not more than 15 days prior to the delivery thereof, and

          (b)       at such other times as the Trustee may request in writing,
within 30 days after the receipt by the Company of any such request, a list of
similar form and content as of a date not more than 15 days prior to the time
such list is furnished;

EXCLUDING from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.


Section 702.        Preservation of Information; Communications to Holders.

          (a)       The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Holders contained in the most
recent list furnished to the Trustee as provided in Section 701 and the names
and addresses of Holders received by the Trustee in its capacity as Security
Registrar.  The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

          (b)       The rights of Holders to communicate with other Holders with
respect to their rights under this Indenture or under the Securities, and the
corresponding rights and duties of the Trustee, shall be as provided by the
Trust Indenture Act.

          (c)       Every Holder of Securities, by receiving and holding the
same, agrees with the Company and the Trustee that neither the Company nor the
Trustee nor any agent of either of them shall be held accountable by reason of
any disclosure of information as to names and addresses of Holders made pursuant
to the Trust Indenture Act.


Section 703.        Reports by Trustee.

          (a)       The Trustee shall transmit to Holders such reports
concerning the Trustee and its actions under this Indenture as may be required
pursuant to the Trust Indenture Act at the times and in the manner provided
pursuant thereto.

          (b)       A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission and with the Company.  The
Company will notify the Trustee when the Securities are listed on any stock
exchange.


                                      -49-

<PAGE>

Section 704.        Reports by Company.

          The Company shall file with the Trustee and the Commission, and
transmit to Holders, such information, documents and other reports, and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner provided pursuant to the Trust Indenture Act; PROVIDED
that any such information, documents or reports required to be filed with the
Commission pursuant to Section 13 or 15(d) of the Securities Exchange Act of
1934 shall be filed with the Trustee within 15 days after the same is so
required to be filed with the Commission.


                                  ARTICLE EIGHT

                    CONSOLIDATION, MERGER, OR SALE OF ASSETS


Section 801.        No Restrictions.

          Nothing contained in this Indenture or in any of the Securities shall
prevent any consolidation or merger of the Company with or into any other
corporation or corporations (whether or not affiliated with the Company), or
successive consolidations or mergers in which the Company or its successor or
successors shall be a party or parties, or shall prevent any sale, conveyance,
transfer or other disposition of the property of the Company or its successor or
successors as an entirety, or substantially as an entirety, to any other
corporation (whether or not affiliated with the Company or its successor or
successors) authorized to acquire and operate the same; PROVIDED, HOWEVER, the
Company hereby covenants and agrees that, upon any such consolidation, merger,
sale, conveyance, transfer or other disposition, the due and punctual payment of
the principal of and interest on the Securities, according to their tenor, and
the due and punctual performance and observance of all the covenants and
conditions of this Indenture with respect to the Securities to be kept or
performed by the Company, shall be expressly assumed, by supplemental indenture
(which shall conform to the provisions of the Trust Indenture Act, as then in
effect) satisfactory in form to the Trustee executed and delivered to the
Trustee by the entity formed by such consolidation, or into which the Company
shall have been merged, or by the entity which shall have acquired such
property.


Section 802.        Successor Substituted.

          (1)       Upon any such consolidation, merger, sale, conveyance,
transfer or other disposition, in accordance with Section 801 and upon the
assumption by the successor corporation, by supplemental indenture, executed and
delivered to the Trustee and satisfactory in form to the Trustee, of the due and
punctual


                                      -50-

<PAGE>

payment of the principal of and interest on all of the Outstanding Securities
and the due and punctual performance of all of the covenants and conditions of
this Indenture with respect to the Securities to be kept or performed by the
Company, the successor Person formed by such consolidation, merger, sale,
conveyance, transfer or other disposition, shall succeed to, and be substituted
for, and may exercise every right and power of, the Company under this Indenture
with the same effect as if such successor Person had been named as the Company
herein, and thereafter the predecessor Person shall be relieved of all
obligations and covenants under this Indenture and the Securities.

          (2)       In case of any such consolidation, merger, sale, conveyance,
transfer or other disposition such changes in phraseology and form (but not in
substance) may be made in the Securities thereafter to be issued as may be
appropriate.

          (3)       Nothing contained in this Indenture or in any of the
Securities shall prevent the Company from merging into itself or acquiring by
purchase or otherwise all or any part of the property of any other corporation
(whether or not affiliated with the Company).


                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES


Section 901.        Supplemental Indentures Without Consent of Holders.

          Without the consent of any Holders, the Company, when authorized by a
Board Resolution, and the Trustee, at any time and from time to time, may enter
into one or more indentures supplemental hereto, in form satisfactory to the
Trustee, for any of the following purposes:

          (1)       to evidence the succession of another Person to the Company
and the assumption by any such successor of the covenants of the Company
contained herein and in the Securities; or

          (2)       to add to the covenants of the Company for the benefit of
the Holders, or to surrender any right or power herein conferred upon the
Company; or

          (3)       to secure the Securities; or

          (4)       to cure any ambiguity, to correct or supplement any
provision herein which may be defective or inconsistent with any other provision
contained herein, or to make any other


                                      -51-

<PAGE>

provisions with respect to matters or questions arising under this Indenture
which shall not be inconsistent with the provisions of this Indenture, PROVIDED
that such action pursuant to this Clause (4) shall not adversely affect the
interests of the Holders of the Securities.

          The Trustee is hereby authorized to join with the Company in the
execution of any such supplemental indenture, and to make any further
appropriate agreements and stipulations which may be therein contained, but the
Trustee shall not be obligated to enter into any such supplemental indenture
which affects the Trustee's own rights, duties or immunities under this
Indenture or otherwise.

          Any supplemental indenture authorized by the provisions of this
Section may be executed by the Company and the Trustee without the consent of
the holders of any of the Securities at the time Outstanding, notwithstanding
any of the provisions of Section 902.  No consent of the holders of any
Preferred Securities shall be required in connection with any supplemental
indenture entered into pursuant to this Section 901.


Section 902.        Supplemental Indentures with Consent of Holders.

          With the consent of the holders of not less than a majority in
principal amount of the Outstanding Securities, by Act of said Holders delivered
to the Company and the Trustee, the Company, when authorized by a Board
Resolution, and the Trustee may from time to time and at any time enter into an
indenture or indentures supplemental hereto (which shall conform to the
provisions of the Trust Indenture Act as then in effect) for the purpose of
adding any provisions to or changing in any manner or eliminating any of the
provisions of this Indenture or of any supplemental indenture or of modifying in
any manner the rights of the Holders under this Indenture; PROVIDED, HOWEVER,
that no such modification shall, without the consent of the Holder of each
Outstanding Security affected thereby,

          (1)       extend the Stated Maturity of the principal of (other than
in accordance with the provisions of Section 301) or any installment of interest
(including any Additional Interest) on any Security or reduce the principal
amount thereof, or reduce the rate or extend the time of payment of interest
thereon; or

          (2)       reduce the percentage in principal amount of the Outstanding
Securities, the consent of whose Holders is required for any such supplemental
indenture; or

          (3)       modify any of the provisions of this Section, Section 513 or
Section 1006, except to increase any such percentage or to provide that certain
other provisions of this Indenture cannot be modified or waived without the
consent of the Holder of each Outstanding Security affected thereby.


                                      -52-

<PAGE>

          It shall not be necessary for any Act of Holders under this Section to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such Act shall approve the substance thereof.

          Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of this Section, the Trustee
shall transmit by mail, first-class postage prepaid, a notice, setting forth in
general terms the substance of such supplemental indenture, to the Holders of
all Outstanding the Securities as their names and addresses appear upon the
Securities Register.  Any failure of the Trustee to mail such notice, or any
defect therein, shall not, however, in any way impair or affect the validity of
any such supplemental indenture.


Section 903.        Execution of Supplemental Indentures.

          In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 601) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture.  Upon the request of the Company,
accompanied by a Board Resolution authorizing the execution of any such
supplemental indenture, and upon the filing with the Trustee of evidence of the
consent of Holders of the Securities required to consent thereto as aforesaid,
the Trustee shall join with the Company in the execution of such supplemental
indenture unless such supplemental indenture affects the Trustee's own rights,
duties or immunities under this Indenture or otherwise, in which case the
Trustee may in its discretion but shall not be obligated to enter into such
supplemental indenture.


Section 904.        Effect of Supplemental Indentures.

          Upon the execution of any supplemental indenture under this Article,
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and the
respective rights, limitations of rights, obligations, duties and immunities
under this Indenture of the Trustee, the Company and the Holders of Securities
shall thereafter be determined, exercised and enforced hereunder subject in all
respects to such modifications and amendments.


                                      -53-

<PAGE>

Section 905.        Conformity with Trust Indenture Act.

          Every supplemental indenture executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act.


Section 906.        Reference in Securities to Supplemental Indentures.

          Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may bear a notation in form
approved by the Company, provided such form meets the requirements of any
exchange upon which the Securities may be listed, as to any matter provided for
in such supplemental indenture.  If the Company shall so determine, new
Securities so modified as to conform, in the opinion of the Board of Directors,
to any such supplemental indenture may be prepared and executed by the Company
and authenticated and delivered by the Trustee in exchange for Outstanding
Securities.


                                   ARTICLE TEN

                    COVENANTS; REPRESENTATIONS AND WARRANTIES


Section 1001.       Payment of Principal and Interest.


          The Company will duly and punctually pay or cause to be paid the
principal of and interest on the Securities in accordance with the terms of the
Securities and this Indenture.


Section 1002.       Maintenance of Office or Agency.

          The Company will maintain in The City of New York an office or agency
(i) where Securities may be presented or surrendered for payment, (ii) where
Securities may be surrendered for registration of transfer or exchange, and
(iii) where notices and demands to or upon the Company in respect of the
Securities and this Indenture may be served.  The Company will give prompt
written notice to the Trustee of the location, and any change in the location,
of such office or agency.  If at any time the Company shall fail to maintain any
such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the Corporate Trust Office of the Trustee, and the Company hereby
appoints the Trustee as its agent to receive all such presentations, surrenders,
notices and demands.

          The Company may also from time to time designate one or more other
offices or agencies (in or outside The City of New


                                      -54-

<PAGE>

York) where the Securities may be presented or surrendered for any or all such
purposes and may from time to time rescind such designations; PROVIDED, HOWEVER,
that no such designation or rescission shall in any manner relieve the Company
of its obligation to maintain an office or agency in The City of New York for
such purposes.  The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other office or agency.


Section 1003.       Money for Securities Payments to Be Held in Trust.

          If the Company shall at any time act as its own Paying Agent, it will,
on or before each due date of the principal of or interest on any of the
Securities, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal or interest so becoming due until
such sums shall be paid to such Persons or otherwise disposed of as herein
provided and will promptly notify the Trustee of its action or failure so to
act.

          Whenever the Company shall have one or more Paying Agents, it will,
prior to each due date of the principal of or interest on any Securities,
deposit with a Paying Agent a sum sufficient to pay such amount, such sum to be
held as provided by the Trust Indenture Act, and (unless such Paying Agent is
the Trustee) the Company will promptly notify the Trustee of its action or
failure so to act.

          The Company will cause each Paying Agent other than the Trustee to
execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section, that
such Paying Agent will (i) comply with the provisions of the Trust Indenture Act
applicable to it as a Paying Agent and (ii) during the continuance of any
default by the Company (or any other obligor upon the Securities) in the making
of any payment in respect of the Securities, upon the written request of the
Trustee, forthwith pay to the Trustee all sums held in trust by such Paying
Agent as such.

          The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying Agent, such sums to be held by the Trustee
upon the same trusts as those upon which such sums were held by the Company or
such Paying Agent; and, upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further liability with respect to
such money.

          Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of (or premium, if
any) or interest on any Security


                                      -55-

<PAGE>

and remaining unclaimed for two years after such principal or interest has
become due and payable shall be paid to the Company on Company Request, or (if
then held by the Company) shall be discharged from such trust; and the Holder of
such Security shall thereafter, as an unsecured general creditor, look only to
the Company for payment thereof, and all liability of the Trustee or such Paying
Agent with respect to such trust money, and all liability of the Company as
trustee thereof, shall thereupon cease.


Section 1004.       Statement by Officers as to Default.

          The Company will deliver to the Trustee, on or before May 15 in each
calendar year in which any of the Securities are Outstanding, or on or before
such other day in each calendar year as the Company and the Trustee may from
time to time agree upon, an Officers' Certificate, stating whether or not to the
best knowledge of the signers thereof the Company is in default in the
performance and observance of any of the terms, provisions and conditions of
this Indenture (without regard to any period of grace or requirement of notice
provided hereunder) and, if the Company shall be in default, specifying all such
defaults and the nature and status thereof of which they may have knowledge.


Section 1005.       Existence.

          Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence,
rights (charter and statutory) and franchises; PROVIDED, HOWEVER, that the
Company shall not be required to preserve any such right or franchise if the
Board of Directors shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Company and that the loss
thereof is not disadvantageous in any material respect to the Holders.


Section 1006.       Additional Covenants.

          The Company agrees it will not, directly or indirectly, declare or pay
any dividend on, or redeem, purchase, acquire or make a distribution or
liquidation payment with respect to, any of its Common Stock or preferred stock
(other than as a result of a reclassification of such Common Stock or preferred
stock or the exchange or conversion of one class or series of Common Stock or
preferred stock for another class or series of Common Stock or preferred stock),
or make any guarantee payments with respect to the foregoing, if at such time
(a) there shall have occurred any event that, with the giving of notice or the
lapse of time or both, would constitute an Event of Default hereunder, (b) the
Company shall be in default with respect to its payment of any obligations under
the Parent Guarantee or (c) the Company shall


                                      -56-

<PAGE>

have given notice of its selection of an extended interest payment period as
provided herein and such period, or any extension thereof, shall be continuing.
The Company also covenants (i) to remain the sole General Partner of COMSAT
Capital and maintain 100% ownership of the general partnership interests
thereof; PROVIDED that any permitted successor of the Company under Article
Eight may succeed to the Company's duties as General Partner, (ii) to contribute
capital in an amount equal to at least 3% of the total capital contributions to
COMSAT Capital, (iii) not to voluntarily dissolve, wind-up or terminate COMSAT
Capital, except in connection with the distribution of Securities to the holders
of Preferred Securities in liquidation of COMSAT Capital pursuant to Section
6.2(c) or 9.12 of the Limited Partnership Agreement and in connection with
certain mergers, consolidations or amalgamations permitted by the Limited
Partnership Agreement, (iv) to perform timely all of its duties as General
Partner (including the duty to declare and pay Dividends on the Preferred
Securities), and (v) to use its reasonable efforts to cause COMSAT Capital to
remain a limited partnership except in connection with certain mergers,
consolidations or amalgamations permitted by the Limited Partnership Agreement
and otherwise to continue not to be treated as an association taxable as a
corporation for United States federal income tax purposes.

          The Company also covenants that so long as any Securities are held by
COMSAT Capital, the General Partner shall not (i) direct the time, method and
place of conducting any proceeding for any remedy available to the Trustee, or
executing any trust or power conferred on the Trustee with respect to the
Securities, (ii) waive any past default which is waivable under this Indenture,
(iii) exercise any right to rescind or annul a declaration that the principal of
all the Securities shall be due and payable, or (iv) consent to any amendment,
modification or termination of this Indenture, where such consent shall be
required, without, in each case, obtaining the prior approval of the holders of
at least 66 2/3% or more in liquidation preference of the Preferred Securities
then outstanding, PROVIDED, HOWEVER, that where a consent under this Indenture
would require the consent of each Holder affected thereby, no such consent shall
be given by the General Partner without the prior consent of each holder of the
Preferred Securities.  The General Partner shall not revoke any action
previously authorized or approved by a vote of the Preferred Securities, without
the approval of the holders of Preferred Securities representing 66 2/3% or more
of the aggregate liquidation preference of the Outstanding Preferred Securities.
The General Partner shall notify all holders of the Preferred Securities of any
notice of default received from the Trustee with respect to the Securities.

          The Company also covenants that if the Securities are distributed to
the holders of the Preferred Securities upon the dissolution of COMSAT Capital,
the Company will use its best efforts to list the Securities on the NYSE or on
such other


                                      -57-

<PAGE>

exchange as the Preferred Securities are then listed and traded on the same part
of any such exchange.


                                 ARTICLE ELEVEN

                           SUBORDINATION OF SECURITIES


Section 1101.       Securities Subordinate to Senior Indebtedness.

          The Company covenants and agrees, and each Holder of a Security, by
his acceptance thereof, likewise covenants and agrees, that, to the extent and
in the manner hereinafter set forth in this Article (subject to Article Four),
the payment of the principal of, premium, if any, and interest (including any
Additional Interest) on each and all of the Securities is hereby expressly made
subordinate and junior in right of payment to the prior payment in full of all
Senior Indebtedness of the Company, whether outstanding at the date of this
Indenture or hereafter incurred.


Section 1102.       Payment Over of Proceeds Upon Dissolution, Etc.

          Upon any payment by, or distribution of assets of, the Company to
creditors upon any dissolution, winding-up, liquidation or reorganization of the
Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all amounts due or to become due upon all
Senior Indebtedness shall first be paid in full, or payment thereof provided for
in money in accordance with its terms, before the Holders of the Securities are
entitled to receive any payment or distribution of any kind or character whether
in cash, property or securities, on account of the principal of or interest on
the Securities or on account of any purchase, redemption or other acquisition of
Securities by the Company, any Subsidiary of the Company, the Trustee or any
Paying Agent (all such payments, distributions, purchases, redemptions and
acquisitions herein referred to, individually and collectively, as a "Securities
Payment"); any payment by, or distribution of assets of, the Company of any kind
or character, whether in cash, property or securities, by set-off or otherwise,
to which the Holders of the Securities or the Trustee would be entitled but for
the provisions of this Article shall be paid by the Company or by any
liquidating trustee or agent or other Person making such payment or
distribution, or by the Holders of the Securities or by the Trustee under this
Indenture if received by them or it, directly to the holders of Senior
Indebtedness or their representative or representatives or to the trustee or
trustees under any indenture under which any instruments evidencing any of such
Senior Indebtedness may have been issued, ratably  according to the aggregate
amounts remaining unpaid on account of the


                                      -58-

<PAGE>

Senior Indebtedness held or represented by each, to the extent necessary to pay
all Senior Indebtedness in full, after giving effect to any concurrent payment
to the holders of such Senior Indebtedness.

          In the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment or distribution of assets of the Company of any kind or character,
whether in cash, property or securities, prohibited by the foregoing before all
Senior Indebtedness is paid in full or payment thereof provided for in cash,
then and in such event such payment or distribution 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 to or for the holders of Senior
Indebtedness.

          For purposes of this Article 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 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 to substantially the same extent, or to a greater extent
than, the Securities are so subordinated as provided in this Article.  The
consolidation of the Company with, or the merger of the Company into, another
Person or the liquidation or dissolution of the Company following the conveyance
or transfer of all or substantially all of its properties and assets as an
entirety to another Person upon the terms and conditions set forth in Article
Eight hereof shall not be deemed a dissolution, winding-up, liquidation or
reorganization for the purposes of this Section 1102 if the Person formed by
such consolidation or into which the Company is merged or the Person which
acquires by conveyance or transfer such Properties and assets, as the case may
be, shall, as a part of such consolidation, merger, conveyance or transfer,
comply with the conditions set forth in Article Eight.


Section 1103.       No Payment When Senior Indebtedness in Default.

          In the event that any Senior Payment Default (as defined below) shall
have occurred, then no Securities Payment shall be made, nor shall any property
of the Company or any Subsidiary of the Company be applied to the purchase,
acquisition, retirement or redemption of the Securities, unless


                                      -59-

<PAGE>

and until such Senior Payment Default shall have been cured or waived in writing
or shall have ceased to exist or all amounts then due and payable in respect of
such Senior Indebtedness (including amounts that have become and remain due by
acceleration) shall have been paid in full in cash.  "Senior Payment Default"
means (a) any default in the payment of principal, premium, interest or any
other payment due on any Senior Indebtedness continuing beyond the period of
grace, if any, specified in the instrument evidencing such Senior Indebtedness,
unless and until such default shall have been cured or waived or shall have
ceased to exist, and (b) the acceleration of the maturity of any Senior
Indebtedness because of a default.

          The provisions of this Section shall not apply to any payment on
account of the principal or interest on the Securities with respect to which
Section 1102 hereof would be applicable.


Section 1104.       Payment Permitted If No Default.

          Nothing contained in this Article or elsewhere in this Indenture or in
any of the Securities shall prevent the Company, at any time except during the
pendency of any dissolution, winding-up, liquidation or reorganization of the
Company referred to in Section 1102 hereof or under the conditions described in
Section 1103 hereof, from making any payments on account of the principal or
interest on the Securities.


Section 1105.       Subrogation to Rights of Holders of Senior Indebtedness.

          Subject to the payment in full of all Senior Indebtedness, the rights
of the Holders of the Securities 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 Securities 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
Securities or the Trustee would be entitled except for the provisions of this
Article, and no payments over pursuant to the provisions of this Article to or
for the benefit of the holders of Senior Indebtedness by Holders of the
Securities or the Trustee, shall, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, be deemed to
be a payment or distribution by the Company to or on account of the Senior
Indebtedness.


                                      -60-

<PAGE>

Section 1106.       Provisions Solely to Define Relative Rights.

          The provisions of this Article are and are intended solely for the
purpose of defining the relative rights of the Holders on the one hand and the
holders of Senior Indebtedness on the other hand.  Nothing contained in this
Article or elsewhere in this Indenture or in the Securities is intended to or
shall (a) impair, as among the Company, its creditors other than holders of
Senior Indebtedness and the Holders of the Securities, the obligation of the
Company, which is absolute and unconditional, (and which, subject to the rights
under this Article of the holders of Senior Indebtedness, is intended to rank
equally with all other general obligations of the Company) to pay to the Holders
of the Securities the principal of and interest (including any Additional
Interest) on the Securities as and when the same shall become due and payable in
accordance with their terms; or (b) affect the relative rights against the
Company of the Holders of the Securities and creditors of the Company other than
the holders of Senior Indebtedness; or (c) prevent the Trustee or the Holder of
any Security from exercising all remedies otherwise permitted by applicable law
upon default under this Indenture, subject to the rights, if any, under this
Article of the holders of Senior Indebtedness to receive cash, property and
securities otherwise payable or deliverable to the Trustee or such Holder.


Section 1107.       Trustee to Effectuate Subordination.

          Each Holder of a Security by his or her acceptance thereof authorizes
and directs the Trustee on his or her behalf to take such action as may be
necessary or appropriate to effectuate the subordination provided in this
Article and appoints the Trustee his attorney-in-fact for any and all such
purposes, including, in the event of any dissolution, winding-up, liquidation or
reorganization of the Company, whether in bankruptcy, insolvency, receivership
proceedings, or otherwise, the timely filing of a claim for the unpaid balance
of the Indebtedness of the Company owing to such Holder in the form required in
such proceedings and the causing of such claim to be approved.  If the Trustee
does not file a proper claim at least 30 days before the expiration of the time
to file such claim, then the holders of the Senior Indebtedness and their
agents, trustees or other representatives are authorized to do so (but,shall in
no event be liable for any failure to do so) for and on behalf of the Holders of
the Securities.


Section 1108.       No Waiver of Subordination Provisions.

          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


                                      -61-

<PAGE>

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 Indenture,
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 Trustee or the Holders of the
Securities, without incurring responsibility to the Holders of the Securities
and without impairing or releasing the subordination provided in this Article or
the obligations hereunder of the Holders of the Securities to the holders of
Senior Indebtedness, do any one or more of the following: (i) change the manner,
place or terms of payment or extend the time of payment of, or renew or alter,
Senior Indebtedness, or otherwise amend or supplement in any manner Senior
Indebtedness or any instrument evidencing the same or any agreement under which
Senior Indebtedness is outstanding; (ii) permit the Company to borrow, repay and
then reborrow any or all of the Senior Indebtedness; (iii) sell, exchange,
release or otherwise deal with any property pledged, mortgaged or otherwise
securing Senior Indebtedness; (iv) release any Person liable in any manner for
the collection of Senior Indebtedness; (v) exercise or refrain from exercising
any rights against the Company and any other Person; and (vi) apply any sums
received by them to Senior Indebtedness.


Section 1109.       Notice to Trustee.

          The Company shall give prompt written notice to the Trustee of any
fact known to the Company which would prohibit the making of any payment to or
by the Trustee in respect of the Securities.  Notwithstanding the provisions of
this Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until a Responsible Officer of the Trustee shall have received written
notice thereof from the Company, any holder of Senior Indebtedness, any
Designated Senior Holder or any trustee, fiduciary or agent therefor; and, prior
to the receipt of any such written notice, the Trustee, subject to the
provisions of Section 601 hereof, shall be entitled in all respects to assume
that no such facts exist; PROVIDED, HOWEVER, that if the Trustee shall not have
received the notice provided for in this Section at least three Business Days
prior to the date upon which by the terms hereof any money may become payable
for any purpose (including, without limitation, the payment of the principal of
or interest on any Security), then, anything herein contained to the contrary
notwithstanding, but without limiting the rights and remedies of the holders of
Senior Indebtedness or any trustee, fiduciary or agent therefor, the Trustee
shall have full power and authority to receive such money and to apply the same
to the purpose for


                                      -62-

<PAGE>

which such money was received and shall not be affected by any notice to the
contrary which may be received by it within two Business Days prior to such
date.  Any notice required or permitted to be given to the Trustee by a holder
of Senior Indebtedness or by any Designated Senior Holder shall be in writing
and shall be sufficient for every purpose hereunder if in writing and either (i)
sent via facsimile to the Trustee, the receipt of which shall be confirmed via
telephone, or (ii) mailed, first class postage prepaid, or sent by overnight
carrier, to the Trustee addressed to it at the address of its principal office
specified in the first paragraph of this instrument or at any other address
furnished in writing to such holder of Senior Indebtedness by the Trustee.

          Subject to the provisions of Section 601 hereof, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness or Designated Senior
Holder to establish that such notice has been given by a holder of Senior
Indebtedness or Designated Senior Holder.  In the event that the Trustee
determines in good faith that further evidence is required with respect to the
right of any Person as a holder of Senior Indebtedness or Designated Senior
Holder to participate in any payment or distribution pursuant to this Article,
the Trustee may request such Person to furnish evidence to the reasonable
satisfaction of the Trustee as to the amount of Senior Indebtedness held by such
Person, the extent to which such Person is entitled to participate in such
payment or distribution and any other facts pertinent to the rights of such
Person under this Article, and if such evidence is not furnished, the Trustee
may defer any payment to such Person pending judicial determination as to the
right of such Person to receive such payment.

          Notwithstanding anything else contained herein, no notice, request or
other communication to or with the Trustee shall be deemed given unless received
by a Responsible officer at the Trustee's principal corporate trust office.


Section 1110.       Reliance on Judicial Order or Certificate of Liquidating
                    Agent.

          Upon any payment or distribution of assets of the Company referred to
in this Article, the Trustee, subject to the provisions of Section 601 hereof,
and the Holders of the Securities shall be entitled to rely upon any order or
decree entered by any court of competent jurisdiction in which such dissolution,
winding-up, liquidation or reorganization proceedings are 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 Trustee or to the Holders of
Securities, for the purpose of ascertaining the Persons entitled to participate
in such payment or distribution,


                                      -63-

<PAGE>

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 Article.


Section 1111.       Trustee Not Fiduciary for Holders of Senior Indebtedness.

          The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Indebtedness and shall not be liable to any such holders if it
shall in good faith pay over or distribute to Holders of Securities or to the
Company or to any other Person cash, property or securities to which any holders
of Senior Indebtedness shall be entitled by virtue of this Article or otherwise.


Section 1112.       Rights of Trustee as Holder of Senior Indebtedness;
                    Preservation of Trustee's Rights.

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article with respect to any Senior Indebtedness which
may at any time be held by it, to the same extent as any other holder of Senior
Indebtedness, and nothing in this Indenture shall deprive the Trustee of any of
its rights as such holder.

          Nothing in this Article shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 607 hereof.


Section 1113.       Article Applicable to Paying Agents.

          In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article in addition to or in place of the Trustee; PROVIDED,
HOWEVER, that Section 1111 hereof shall not apply to the Company or any
Affiliate of the Company if it or such Affiliate acts as Paying Agent.

Section 1114.       Trust Moneys Not Subordinated.

          Notwithstanding anything contained herein to the contrary, payments
from money or the proceeds of U.S. Government Obligations held in trust by the
Trustee under Article Four for the payment of the principal of and interest
(including Additional Interest) on the Securities shall not be subordinated to
the prior payment of any Senior Indebtedness or subject to the restrictions set
forth in this Article, and no Holder of


                                      -64-

<PAGE>

Securities nor the Trustee shall be obligated to pay over any such amount to the
Company, any holder of Senior Indebtedness, any Designated Senior Holder or any
other creditor of the Company.


                                 ARTICLE TWELVE

                            REDEMPTION OF SECURITIES


Section 1201.       Mandatory Redemption; Optional Redemption.

          (a)  If COMSAT Capital redeems the Preferred Securities in accordance
with the terms thereof, the Securities will become due and payable in a
principal amount equal to the aggregate stated liquidation preference of the
Preferred Securities so redeemed, together with any accrued and unpaid interest
thereon, including Additional Interest, if any.  Upon any such event, the
Company shall redeem the Securities not later than the date of redemption of the
Preferred Securities, and shall pay the Redemption Price therefor prior to 12:00
noon, New York City time, on the date of such redemption or at such other time
on such earlier date as the Company and COMSAT Capital agree.

          (b)  The Company shall have the right to redeem the Securities without
premium or penalty, in whole or in part, concurrent with the redemption by
COMSAT Capital of the Preferred Securities (if any Preferred Securities are then
outstanding), at any time or from time to time, on or after ___________, 2000,
at a redemption price equal to 100% of the principal amount to be redeemed, plus
any accrued and unpaid interest, including Additional Interest, if any, to the
Redemption Date.

          In the event of any redemption in part, the Company shall not be
required to (i) issue, register the transfer of or exchange any Security during
a period beginning at the opening of business 15 days before any selection for
redemption of Securities and ending at the close of business on the earliest
date in which the relevant notice of redemption is deemed to have been given to
all holders of Securities and (ii) register the transfer of or exchange any
Securities so selected for redemption, in whole or in part, except the
unredeemed portion of any Securities being redeemed in part.


Section 1202.       Applicability of Article.

          Redemption of Securities at the election of the Company, as permitted
by Section 1201(b), shall be made in accordance with such provision and this
Article.


                                      -65-

<PAGE>

Section 1203.       Election to Redeem; Notice to Trustee.

          The election of the Company to redeem Securities pursuant to Section
1201 shall be evidenced by a Board Resolution.  In case of any redemption at the
election of the Company, the Company shall, at least 30 days and no more than 60
days prior to the Redemption Date fixed by the Company, notify the Trustee of
such Redemption Date and of the principal amount of Securities to be redeemed
and provide a copy of the notice of redemption given to Holders of Securities to
be redeemed pursuant to Section 1204.


Section 1204.       Notice of Redemption.

          Notice of redemption shall be given by first-class mail, postage
prepaid, mailed not less than 30 nor more than 60 days prior to the Redemption
Date, to each Holder of Securities to be redeemed, at his address appearing in
the Security Register.

          All notices of redemption shall be irrevocable and shall state:

          (1)       the Redemption Date,

          (2)       the Redemption Price,

          (3)       that on the Redemption Date the Redemption Price will become
due and payable upon each such Security to be redeemed and that interest thereon
will cease to accrue on and after said date, and

          (4)       the place or places where such Securities are to be
surrendered for payment of the Redemption Price.

          Notice of redemption of Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.


Section 1205.       Deposit of Redemption Price.

          Prior to any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 1003) an amount of
money sufficient to pay the Redemption Price of, and (except if the Redemption
Date shall be an Interest Payment Date) accrued interest on, all the Securities
which are to be redeemed on that date.


                                      -66-

<PAGE>

Section 1206.       Securities Payable on Redemption Date.

          Notice of redemption having been given as aforesaid, the Securities so
to be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date, unless the
Company shall default in the payment of the Redemption Price and accrued
interest, such Securities shall cease to bear interest.  Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption Price, together with accrued interest
to the Redemption Date; PROVIDED, HOWEVER, that installments of interest whose
Stated Maturity is on or prior to the Redemption Date shall be payable to the
Holders of such Securities, or one or more Predecessor Securities, registered as
such at the close of business on the relevant record dates according to their
terms and the provisions of Section 307.

          If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal shall, until paid, bear interest
from the Redemption Date at the rate borne by the Security.


                                      -67-

<PAGE>

          This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.

          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed, and their respective corporate seals to be hereunto affixed
and attested, all as of the day and year first written above.


                              COMSAT Corporation


                              By:
                                   ----------------------------
                                   Bruce L. Crockett
[SEAL]                             President and Chief Executive Officer


Attest: ______________________
             Secretary


                              The First National Bank of Chicago


                              By:
                                   ----------------------------
[SEAL]                             Name:
                                   Its:


Attest:
        -----------------


                                      -68-

<PAGE>

STATE OF MARYLAND             )      ss.:
COUNTY OF MONTGOMERY          )


          On the __ day of ____________, 1995 before me personally came Bruce L.
Crockett, to me known, who, being by me duly sworn, did depose and say that he
is the President and Chief Executive Officer of COMSAT Corporation, a
corporation described in and which executed the foregoing instrument; that he
knows the seal of said corporation; that the seal affixed to said instrument is
such corporate seal; that it was so affixed by order of the Board of Directors
of said corporation; and that he signed his name thereto by authority of the
Board of Directors of such corporation.


                               -----------------------------------
                                        Notary-Public


STATE OF ILLINOIS             )      ss.:
COUNTY OF COOK                )


          On the __ day of ___________, 1995, before me personally came
____________________, to me known, who, being by me duly sworn, did depose and
say that he/she is a ______________ of The First National Bank of Chicago, one
of the corporations described in and which executed the foregoing instrument;
that he/she knows the seal of said corporation; that the seal affixed to said
instrument is such corporate seal; that it was so affixed by authority of the
Board of Directors of said corporation, and that he/she signed his/her name
thereto by like authority.


                               ------------------------------------
[Seal]                                  Notary Public


                                      -69-

<PAGE>


<PAGE>

                                                                    EXHIBIT 4(d)
                                                           Draft of July 5, 1995



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


                         AMENDED AND RESTATED AGREEMENT


                                       OF


                               LIMITED PARTNERSHIP


                                       OF


                             COMSAT CAPITAL I, L.P.



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


                        DATED AS OF ______________, 1995


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


<PAGE>

                                 TABLE OF CONTENTS


                                    ARTICLE I

                                  DEFINED TERMS

     Section 1.1  Definitions . . . . . . . . . . . . . . . . . . . . . . . .  1

                                   ARTICLE II

                        CONTINUATION OF THE PARTNERSHIP;
                     ADMISSION OF PREFERRED SECURITY HOLDERS

     Section 2.1  Continuation of the Partnership . . . . . . . . . . . . . .  8
     Section 2.2  Name  . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     Section 2.3  Business of the Partnership . . . . . . . . . . . . . . . .  8
     Section 2.4  Term  . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     Section 2.5  Registered Agent and Office . . . . . . . . . . . . . . . .  9
     Section 2.6  Principal Place of Business . . . . . . . . . . . . . . . .  9
     Section 2.7  Name and Business Address of General Partner  . . . . . . .  9
     Section 2.8  Qualification to Do Business  . . . . . . . . . . . . . . .  9
     Section 2.9  Admission of Holders of Preferred Securities as Limited
          Partners  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9

                                   ARTICLE III

                    CAPITAL CONTRIBUTIONS; REPRESENTATION OF
             PREFERRED SECURITY HOLDER'S INTEREST; CAPITAL ACCOUNTS

     Section 3.1  Capital Contributions . . . . . . . . . . . . . . . . . . . 10
     Section 3.2  Preferred Security Holder's Interest Represented by
          LP Certificate  . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     Section 3.3  Capital Accounts  . . . . . . . . . . . . . . . . . . . . . 11
     Section 3.4  Interest on Capital Contributions . . . . . . . . . . . . . 11
     Section 3.5  Withdrawal and Return of Capital Contributions  . . . . . . 11

                                   ARTICLE IV

                                   ALLOCATIONS

     Section 4.1  Profits and Losses  . . . . . . . . . . . . . . . . . . . . 11
     Section 4.2  Special Allocations . . . . . . . . . . . . . . . . . . . . 13
     Section 4.3  Allocations for Income Tax Purposes . . . . . . . . . . . . 14
     Section 4.4  Withholding . . . . . . . . . . . . . . . . . . . . . . . . 14


                                       -i-

<PAGE>

                                     ARTICLE V

                           DIVIDENDS AND DISTRIBUTIONS

     Section 5.1  Dividends . . . . . . . . . . . . . . . . . . . . . . . . . 15
     Section 5.2  Limitations on Distributions  . . . . . . . . . . . . . . . 15

                                   ARTICLE VI

                        ISSUANCE OF PREFERRED SECURITIES

     Section 6.1  General Provisions Regarding Preferred Securities . . . . . 15
     Section 6.2  Preferred Securities  . . . . . . . . . . . . . . . . . . . 17

                                   ARTICLE VII

                      BOOKS OF ACCOUNT, RECORDS AND REPORTS

     Section 7.1  Books and Records . . . . . . . . . . . . . . . . . . . . . 24
     Section 7.2  Accounting Method . . . . . . . . . . . . . . . . . . . . . 24

                                  ARTICLE VIII

                            POWERS, RIGHTS AND DUTIES
                             OF THE LIMITED PARTNERS

     Section 8.1  Limitations . . . . . . . . . . . . . . . . . . . . . . . . 25
     Section 8.2  Liability . . . . . . . . . . . . . . . . . . . . . . . . . 25
     Section 8.3  Priority  . . . . . . . . . . . . . . . . . . . . . . . . . 25

                                   ARTICLE IX

                           POWERS, RIGHTS AND DUTIES
                             OF THE GENERAL PARTNER

     Section 9.1  Authority . . . . . . . . . . . . . . . . . . . . . . . . . 25
     Section 9.2  Powers and Duties of General Partner  . . . . . . . . . . . 25
     Section 9.3  Expenses Payable by General Partner . . . . . . . . . . . . 27
     Section 9.4  Liability . . . . . . . . . . . . . . . . . . . . . . . . . 27
     Section 9.5  Exculpation . . . . . . . . . . . . . . . . . . . . . . . . 27
     Section 9.6  Fiduciary Duty  . . . . . . . . . . . . . . . . . . . . . . 28
     Section 9.7  [Intentionally Omitted.]  . . . . . . . . . . . . . . . . . 29
     Section 9.8  Investment Company or Tax Actions . . . . . . . . . . . . . 29
     Section 9.9  Outside Businesses  . . . . . . . . . . . . . . . . . . . . 29
     Section 9.10 Limits on General Partner's Powers  . . . . . . . . . . . . 30
     Section 9.11 Tax Matters Partner . . . . . . . . . . . . . . . . . . . . 31
     Section 9.12 Merger, Consolidation or Amalgamation of the Partnership  . 32


                                      -ii-

<PAGE>

                                     ARTICLE X

                       TRANSFERS OF INTERESTS BY PARTNERS

     Section 10.1  Transfer of Interests  . . . . . . . . . . . . . . . . . . 33
     Section 10.2  Transfer of LP Certificates  . . . . . . . . . . . . . . . 33
     Section 10.3  Persons Deemed Preferred Security Holders  . . . . . . . . 34
     Section 10.4  Book-Entry Interests . . . . . . . . . . . . . . . . . . . 34
     Section 10.5  Notices to Clearing Agency . . . . . . . . . . . . . . . . 35
     Section 10.6  Appointment of Successor Clearing Agency . . . . . . . . . 35
     Section 10.7  Definitive LP Certificates; Appointment of Paying Agent  . 35

                                   ARTICLE XI

                            WITHDRAWAL; DISSOLUTION;
                     LIQUIDATION AND DISTRIBUTION OF ASSETS

     Section 11.1  Withdrawal of Partners . . . . . . . . . . . . . . . . . . 36
     Section 11.2  Dissolution of the Partnership . . . . . . . . . . . . . . 36
     Section 11.3  Liquidation  . . . . . . . . . . . . . . . . . . . . . . . 38
     Section 11.4  Distribution in Liquidation  . . . . . . . . . . . . . . . 39
     Section 11.5  Rights of Limited Partners . . . . . . . . . . . . . . . . 39
     Section 11.6  Termination  . . . . . . . . . . . . . . . . . . . . . . . 39

                                   ARTICLE XII

                             AMENDMENTS AND MEETINGS

     Section 12.1  Amendments . . . . . . . . . . . . . . . . . . . . . . . . 39
     Section 12.2  Amendment of Certificate . . . . . . . . . . . . . . . . . 40
     Section 12.3  Meetings of Partners . . . . . . . . . . . . . . . . . . . 40

                                  ARTICLE XIII

                                  MISCELLANEOUS

     Section 13.1  Notices  . . . . . . . . . . . . . . . . . . . . . . . . . 41
     Section 13.2  Power of Attorney  . . . . . . . . . . . . . . . . . . . . 42
     Section 13.3  Entire Agreement . . . . . . . . . . . . . . . . . . . . . 42
     Section 13.4  GOVERNING LAW  . . . . . . . . . . . . . . . . . . . . . . 42
     Section 13.5  Effect . . . . . . . . . . . . . . . . . . . . . . . . . . 42
     Section 13.6  Pronouns and Number  . . . . . . . . . . . . . . . . . . . 42
     Section 13.7  Captions . . . . . . . . . . . . . . . . . . . . . . . . . 43
     Section 13.8  Partial Enforceability . . . . . . . . . . . . . . . . . . 43
     Section 13.9  Counterparts . . . . . . . . . . . . . . . . . . . . . . . 43
     Section 13.10 Waiver of Partition  . . . . . . . . . . . . . . . . . . . 43
     Section 13.11 Remedies . . . . . . . . . . . . . . . . . . . . . . . . . 43


                                      -iii-

<PAGE>

 ANNEX A --     Form of LP Certificate Evidencing Preferred Securities




                                      -iv-

<PAGE>

                          AMENDED AND RESTATED AGREEMENT
                             OF LIMITED PARTNERSHIP

                                       OF

                             COMSAT CAPITAL I, L.P.


          AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP of COMSAT
Capital I, L.P., a Delaware limited partnership (the "PARTNERSHIP"), dated as of
_______, 1995, among COMSAT Corporation, a District of Columbia corporation
("COMSAT"), as the general partner, the Partnership and COMSAT SPV, Inc., a
Delaware corporation, as the initial limited partner (the "INITIAL LIMITED
PARTNER") and such other Persons (as defined herein) who become Limited Partners
(as defined herein) as provided herein.

          WHEREAS, COMSAT and the Initial Limited Partner entered into a Limited
Partnership Agreement, dated as of May 22, 1995 (the "ORIGINAL LIMITED
PARTNERSHIP AGREEMENT");

          WHEREAS, the Certificate of Limited Partnership of the Partnership was
filed with the Office of the Secretary of State of the State of Delaware on May
22, 1995; and

          WHEREAS, the Partners desire to continue the Partnership under the Act
(as defined herein) and to amend and restate the Original Limited Partnership
Agreement in its entirety.

          NOW, THEREFORE, in consideration of the agreements and obligations set
forth herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree to amend
and restate the Original Limited Partnership Agreement as follows:


                                    ARTICLE I

                                  DEFINED TERMS

          Section 1.1  DEFINITIONS.  Unless the context otherwise requires, the
terms defined in this Article I shall, for the purposes of this Agreement, have
the meanings herein specified.

          "1940 ACT" means the Investment Company Act of 1940, as amended.


<PAGE>

           "ACT" means the Delaware Revised Uniform Limited Partnership Act, as
amended from time to time.

          "ADDITIONAL DIVIDENDS" means Dividends that shall accrue on any
Dividend arrearages in respect of the Preferred Securities (as defined herein)
at the rate of ___% per annum, compounded monthly.

          "ADDITIONAL INTEREST" means (i) interest that shall accrue on any
interest on the Subordinated Debentures (as defined herein) that is not paid
when due or not paid during an extension of an interest payment period, which in
either case shall accrue at the rate of ___% per annum compounded monthly, and
(ii) an amount equal to any amount that the Partnership would be required to pay
in taxes, duties, assessments or governmental charges of whatever nature (other
than withholding taxes) imposed by the United States or any other taxing
authority such that the net amounts received and retained by the Partnership
after paying any such taxes, duties, assessments or governmental charges will
not be less than the amounts the Partnership would have received had no such
taxes, duties, assessments or governmental charges been imposed.

          "AFFILIATE" means, with respect to a specified Person, (a) any Person
directly or indirectly owning, controlling or holding with power to vote 10% or
more of the outstanding voting securities or other ownership interests of the
specified Person, (b) any Person 10% or more of whose outstanding voting
securities or other ownership interests are directly or indirectly owned,
controlled or held with power to vote by the specified Person, (c) any Person
directly or indirectly controlling, controlled by, or under common control with
the specified Person, (d) a partnership in which the specified Person is a
general partner, (e) any officer or director of the specified Person and (f) if
the specified Person is an officer, director, general partner or employee, any
other entity for which the specified Person acts in any such capacity.

          "AGREEMENT" means this Amended and Restated Agreement of Limited
Partnership, as amended, modified, supplemented or restated from time to time in
accordance with its terms.

          "BOOK-ENTRY INTEREST" means a beneficial interest in the LP
Certificates (as defined herein), ownership of which shall be recorded and
transfers of which shall be made through the book-entry system of a Clearing
Agency (as defined herein) as described in Section 10.4.


                                       -2-

<PAGE>

           "BUSINESS DAY" means any day other than a day on which banking
institutions in The City of New York are authorized or required by law or
executive order to close.

          "CAPITAL ACCOUNT" has the meaning set forth in Section 3.3.

          "CERTIFICATE" means the Certificate of Limited Partnership of the
Partnership filed with the Secretary of State of the State of Delaware on May
22, 1995, and any and all amendments thereto and restatements thereof.

          "CHANGE IN 1940 ACT LAW" has the meaning set forth in the definition
of "Investment Company Event" below.

          "CLEARING AGENCY" means an organization registered as a "Clearing
Agency" pursuant to Section 17A of the Exchange Act (as defined herein) that is
acting as depositary for the Preferred Securities and in whose name (or
nominee's name) shall be registered one or more global LP Certificates and which
shall undertake to effect book-entry transfers and pledges of the Preferred
Securities.

          "CLEARING AGENCY PARTICIPANT" means a broker, dealer, bank, other
financial institution or other Person for whom from time to time a Clearing
Agency effects bookentry transfers and pledges of interests in securities
deposited with the Clearing Agency.

          "CLOSING DATE" means the "Time of Delivery" under the Underwriting
Agreement (as defined herein).

          "CODE" means the Internal Revenue Code of 1986, as amended from time
to time, or any corresponding federal tax statute enacted after the date of this
Agreement.  A reference to a specific section (Section) of the Code refers not
only to such specific section, but also to any corresponding provision of any
federal tax statute enacted after the date of this Agreement, as such specific
section or corresponding provision is in effect on the date of application of
the provisions of this Agreement containing such reference.

          "COMSAT" has the meaning set forth in the introductory paragraph of
this Agreement.

          "COMSAT COMMON STOCK" means the common stock, without par value, of
COMSAT.

          "COVERED PERSON" means any officers, directors, shareholders,
partners, employees, representatives or agents


                                       -3-

<PAGE>

of the General Partner or its Affiliates, or any employee or agent of the
Partnership or its Affiliates.

          "DEFINITIVE LP CERTIFICATES" has the meaning set forth in Section 10.4
of this Agreement.

          "DIVIDENDS" means the cumulative cash distributions from the
Partnership with respect to the Interests (as defined herein) represented by the
Preferred Securities, accruing from the Closing Date and payable monthly in
arrears on the last day of each calendar month of each year, commencing
___________, 1995, pursuant to Section 6.2.

          "DIVIDEND PAYMENT DATE" has the meaning set forth in Section
6.2(b)(ii) of this Agreement.

          "DTC" means The Depository Trust Company, the initial Clearing Agency.

          "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

          "FISCAL PERIOD" means each calendar month.

          "FISCAL YEAR" means (i) the period commencing upon the formation of
the Partnership and ending on December 31, 1995, and (ii) any subsequent twelve
(12) month period commencing on January 1 and ending on December 31.

          "GENERAL PARTNER" means COMSAT in its capacity as general partner of
the Partnership, its permitted successors, or any successor general partner in
the Partnership admitted as such pursuant to the applicable provisions of this
Agreement.

          "GUARANTEE" means the Guarantee Agreement dated as of _____________,
1995 of COMSAT in favor of the Preferred Security Holders (as defined herein)
with respect to the Preferred Securities.

          "HOLDER" or "PREFERRED SECURITY HOLDER" means a Limited Partner in
whose name an LP Certificate representing Preferred Securities is registered.

          "INDENTURE" means the Indenture, dated as of _______________, 1995, as
amended or supplemented from time to time, between COMSAT and the Trustee and
any supplemental Indenture thereto entered into by COMSAT pursuant to which
Subordinated Debentures of COMSAT are to be issued.

          "INITIAL LIMITED PARTNER" has the meaning set forth in the
introductory paragraph of this Agreement.


                                       -4-

<PAGE>


          "INTEREST" means the entire ownership interest of a Partner in the
Partnership at any particular time, including, without limitation, its interest
in the capital, profits, losses and distributions of the Partnership.

          "INVESTMENT COMPANY EVENT" means the occurrence of a change in law or
regulation or a written change in interpretation or application of law or
regulation by any legislative body, court, governmental agency or regulatory
authority (a "CHANGE IN 1940 ACT LAW") to the effect that the Partnership is or
will be considered an "investment company" which is required to be registered
under the Investment Company Act of 1940, as amended (the "1940 ACT"), which
Change in 1940 Act Law becomes effective on or after _____________, 1995;
PROVIDED, HOWEVER, that no Investment Company Event shall be deemed to have
occurred if the General Partner obtains a written opinion of nationally
recognized independent counsel to the Partnership experienced in practice under
the 1940 Act to the effect that, notwithstanding such Change in 1940 Act Law,
the Partnership is not required to be registered as an "investment company"
within the meaning of the 1940 Act.

          "LIMITED PARTNER" means any Person who is admitted to the Partnership
as a Limited Partner pursuant to the terms of this Agreement.

          "LIQUIDATION DISTRIBUTION" has the meaning set forth in Section
4.1(c).

          "LIQUIDATOR" has the meaning specified in Section 11.3 of this
Agreement.

          "LP CERTIFICATE" means a certificate substantially in the form
attached hereto as Annex A, evidencing the Preferred Securities held by a
Limited Partner.

          "MAJORITY (OR OTHER STATED PERCENTAGE) IN LIQUIDATION PREFERENCE"
means Holder(s) of Preferred Securities who are the record owners of Preferred
Securities whose aggregate liquidation preferences represent not less than 50%
(or not less than the relevant stated percentage) of the aggregate liquidation
preference of all Preferred Securities then outstanding.

          "NET INCOME" and "NET LOSS", respectively, for any Fiscal Period means
the income and loss, respectively, of the Partnership for such Fiscal Period as
determined in accordance with the method of accounting followed by the
Partnership for federal income tax purposes, including, for all purposes, any
income exempt from tax and any expenditures of the Partnership which are
described in Code


                                       -5-

<PAGE>


Section 705(a)(2)(B); PROVIDED, HOWEVER, that any item allocated under Section
4.2 shall be excluded from the computation of Net Income and Net Loss.

          "NOTICE OF REDEMPTION" has the meaning set forth in Section 6.2(d)(i)
of this Agreement.

          "NYSE" means the New York Stock Exchange, Inc.

          "ORIGINAL LIMITED PARTNERSHIP AGREEMENT" has the meaning set forth in
the recitals to this Agreement.

          "PARTNERS" means the General Partner and the Limited Partners,
collectively, where no distinction is required by the context in which the term
is used.

          "PARTNERSHIP" means the limited partnership formed under the Act
pursuant to the Original Limited Partnership Agreement upon filing of the
Certificate, and continued pursuant to this Agreement.

          "PERSON" means any individual, corporation, association, partnership,
trust or other entity.

          "POWER OF ATTORNEY" means the Power of Attorney granted pursuant to
Section 13.2.

          "PREFERRED SECURITIES" means the Interests of Limited Partners
described in Article VI.

          "PREFERRED SECURITY OWNER" means, with respect to a Book-Entry
Interest, a Person who is the beneficial owner of such Book-Entry Interest, as
reflected on the books of the Clearing Agency, or on the books of a Person
maintaining an account with such Clearing Agency (directly as a Clearing Agency
Participant or as an indirect participant, in each case in accordance with the
rules of such Clearing Agency or Clearing Agency Participant).

          "PURCHASE PRICE" for any Preferred Security means the amount paid per
Preferred Security pursuant to the Underwriting Agreement, payment of which
shall constitute the contribution to capital contemplated by Section 3.1(c).

          "REDEMPTION PRICE" has the meaning set forth in Section 6.2(c) of this
Agreement.

          "SECURITIES ACT" means the Securities Act of 1933, as amended.


                                       -6-

<PAGE>

           "SPECIAL REPRESENTATIVE" means the Person appointed by the Preferred
Security Holders pursuant to Section 6.2(f) of this Agreement.

          "SUBORDINATED DEBENTURES" means the __% Junior Subordinated Deferrable
Interest Debentures of COMSAT issued pursuant to the Indenture and sold by
COMSAT to the Partnership in connection with the issuance and sale by the
Partnership of the Preferred Securities.

          "SUCCESSOR SECURITIES" has the meaning set forth in Section 9.12 of
this Agreement.

          "TAX EVENT" means that the General Partner shall have obtained an
opinion of nationally recognized independent tax counsel experienced in such
matters to the effect that, as a result of (a) any amendment to, or change
(including any announced prospective change) in, the laws (or any regulations
thereunder) of the United States or any political subdivision or taxing
authority thereof or therein, (b) any amendment to or change in an
interpretation or application of such laws or regulations by any legislative
body, court, governmental agency or regulatory authority (including the
enactment of any legislation and the publication of any judicial decision or
regulatory determination on or after _______, 1995), or (c) any interpretation
or pronouncement that provides for a position with respect to such laws or
regulations that differs from the generally accepted position on ________, 1995,
which amendment or change is effective or such interpretation or pronouncement
is announced on or after _______, 1995, there is more than an insubstantial risk
that (i) the Partnership is subject to federal income tax with respect to
interest received on the Subordinated Debentures, (ii) interest payable to the
Partnership on the Subordinated Debentures will not be deductible for federal
income tax purposes or (iii) the Partnership is subject to more than a DE
MINIMIS amount of other taxes, duties or other governmental charges.

          "TAX MATTERS PARTNER" means the General Partner designated as such in
Section 9.11 hereof.

          "TRANSFER AGENT" means The First National Bank of Chicago and its
successors and assigns.

          "TREASURY REGULATIONS" means the income tax regulations, including
temporary regulations, promulgated under the Code, as such regulations may be
amended from time to time (including corresponding provisions of succeeding
regulations).


                                       -7-

<PAGE>

           "TRUSTEE" means The First National Bank of Chicago, the trustee under
the Indenture, and its successors and assigns.

          "UNDERWRITERS" means the underwriters named in Schedule I to the
Underwriting Agreement.

          "UNDERWRITING AGREEMENT" means the Underwriting Agreement dated
_____________, 1995, among COMSAT, the Partnership and the several Underwriters
named therein relating to the issuance of the Preferred Securities.


                                   ARTICLE II

                        CONTINUATION OF THE PARTNERSHIP;
                     ADMISSION OF PREFERRED SECURITY HOLDERS

          Section 2.1  CONTINUATION OF THE PARTNERSHIP.  The parties hereto
agree to continue the Partnership in accordance with the terms of this
Agreement.  The General Partner, for itself and as agent for the Limited
Partners, shall accomplish all filing, recording, publishing and other acts
necessary or appropriate for effectiveness of this Agreement and for compliance
with all the requirements for the continuation of the Partnership as a limited
partnership under the Act and under all other laws of the State of Delaware or
such other jurisdictions in which the General Partner determines that the
Partnership may conduct business.  The rights and duties of the Partners shall
be as provided herein and, subject to the terms hereof, in the Act.

          Section 2.2  NAME.  The name of the Partnership is "COMSAT Capital I,
L.P.", as such name may be modified from time to time by the General Partner
following written notice to the Limited Partners.

          Section 2.3  BUSINESS OF THE PARTNERSHIP.  The purposes of the
Partnership are (a) to issue limited partnership interests in the Partnership in
the form of Preferred Securities, and to use the proceeds therefrom and the
capital contributed to the Partnership by the General Partner to purchase
Subordinated Debentures and (b) except as otherwise limited herein, to enter
into, make and perform all contracts and other undertakings, and engage in all
activities and transactions as the General Partner may reasonably deem necessary
or advisable for the carrying out of the foregoing purposes of the Partnership.
The Partnership may not conduct any other business or operations except as
contemplated by the preceding sentence.


                                       -8-

<PAGE>

           Section 2.4  TERM.  The term of the Partnership commenced upon the
filing of the Certificate in the Office of the Secretary of State of the State
of Delaware and shall continue until December 31, 2094, unless dissolved before
such date in accordance with the provisions of this Agreement.

          Section 2.5  REGISTERED AGENT AND OFFICE.  The Partnership's
registered agent and office in Delaware shall be The Corporation Trust Company,
Corporation Trust Center, 1209 Orange Street, Wilmington, New Castle County,
Delaware 19801.  At any time, the General Partner may designate another
registered agent and/or registered office.

          Section 2.6  PRINCIPAL PLACE OF BUSINESS.  The principal place of
business of the Partnership shall be c/o COMSAT Corporation, 6560 Rock Spring
Drive, Bethesda, MD  20817-1146.  Upon ten days' written notice to the Partners,
the General Partner may change the location of the Partnership's principal place
of business, provided that such change has no material adverse effect upon any
Partner.

          Section 2.7  NAME AND BUSINESS ADDRESS OF GENERAL PARTNER.  The name
and address of the General Partner are as follows:

          COMSAT Corporation
          6560 Rock Spring Drive
          Bethesda, Maryland  20817-1146
          Attention:  Chief Financial Officer

The General Partner may change its name or business address from time to time,
in which event the General Partner shall promptly notify the Limited Partners of
any such change.

          Section 2.8  QUALIFICATION TO DO BUSINESS.  The General Partner shall
cause the Partnership to become qualified, formed or registered under the
applicable qualification, fictitious name or similar laws of any jurisdiction in
which the Partnership transacts business.

          Section 2.9  ADMISSION OF HOLDERS OF PREFERRED SECURITIES AS LIMITED
PARTNERS.

          (a)  Without execution of this Agreement, upon the acquisition of an
LP Certificate by a Person, whether by purchase, gift, devise or otherwise,
which acquisition shall be deemed to constitute a request by such Person that
the books and records of the Partnership reflect such Person's admission as a
Limited Partner, such Person shall be admitted to the Partnership as a Limited
Partner and shall become bound by this Agreement.


                                       -9-

<PAGE>


          (b)  Following the first admission of a Preferred Security Holder to
the Partnership as a Limited Partner, the Initial Limited Partner shall receive
the return of its capital contribution without interest or deduction and will
cease to be a Limited Partner.

          (c)  The name and mailing address of each Partner and the amount
contributed by such Partner to the capital of the Partnership shall be listed on
the books and records of the Partnership.  The General Partner shall be required
to update the books and records from time to time as necessary to accurately
reflect such information.


                                   ARTICLE III

                    CAPITAL CONTRIBUTIONS; REPRESENTATION OF
             PREFERRED SECURITY HOLDER'S INTEREST; CAPITAL ACCOUNTS

          Section 3.1  CAPITAL CONTRIBUTIONS.

          (a)  The General Partner has, on or prior to the Closing Date,
contributed an aggregate of $100 to the capital of the Partnership. The General
Partner shall, on or prior to the Closing Date, make such additional capital
contribution as is necessary for the General Partner to have contributed an
aggregate of 3% of the capital contributed by all Partners as of the Closing
Date.

          (b)  The Initial Limited Partner has, prior to the date hereof,
contributed the amount of $100 to the capital of the Partnership, which amount
will be returned to the Initial Limited Partner as contemplated by Section
2.9(b).

          (c)  On the Closing Date, each Person who acquires a Preferred
Security from the Partnership shall, as the consideration for the acquisition of
such Preferred Security, contribute to the capital of the Partnership an amount
in cash equal to the Purchase Price for such Preferred Security.

          (d)  No Limited Partner shall at any time be required to make any
additional capital contributions to the Partnership, except as may be required
by law.

          Section 3.2  PREFERRED SECURITY HOLDER'S INTEREST REPRESENTED BY
LP CERTIFICATE.  A Preferred Security Holder's Interest shall be represented by
the LP Certificate held by or on behalf of such Holder.  Each Preferred Security
Holder's respective ownership of Preferred Securities shall be set forth on the
books and records of the Partnership.  Each Holder hereby agrees that its
Interest


                                      -10-

<PAGE>

represented by its LP Certificate shall for all purposes be personal property.
A Preferred Security Holder shall have no interest in specific Partnership
property.

          Section 3.3  CAPITAL ACCOUNTS.  An individual capital account (a
"CAPITAL ACCOUNT") shall be established and maintained on the books of the
Partnership for each Partner in compliance with Treasury Regulation
Sections 1.704-1(b)(2)(iv) and 1.704-2, as amended.  Subject to the preceding
sentence, each Capital Account will be increased by the amount of the capital
contributions (including the Purchase Price) made by, and the Net Income
allocated to, such Partner (or predecessor in interest) and reduced by the
amount of distributions made by the Partnership, and Net Losses allocated, to
the Partner (or predecessor thereof).  In addition, a Partner's Capital Account
shall be increased or decreased, as the case may be, for any items specially
allocated to such Partner under Section 4.2 of this Agreement, and, to the
extent permitted under such Treasury Regulation, the General Partner's Capital
Account will be increased to the extent the General Partner pays any costs or
expenses of the Partnership directly out of the General Partner's own funds.

          Section 3.4  INTEREST ON CAPITAL CONTRIBUTIONS.  Except as provided
herein, no Partner shall be entitled to interest on or with respect to any
capital contribution to the Partnership.

          Section 3.5  WITHDRAWAL AND RETURN OF CAPITAL CONTRIBUTIONS.  Subject
to Sections 2.9(b) and 3.1(b), no Partner shall be entitled to withdraw any part
of such Partner's capital contribution to the Partnership or be entitled to
receive any distributions from the Partnership, except as provided in this
Agreement.


                                   ARTICLE IV

                                   ALLOCATIONS

          Section 4.1  PROFITS AND LOSSES.  After giving effect to the special
allocations set forth in Section 4.2,

          (a)  the Partnership's Net Income for each Fiscal Period of the
Partnership shall be allocated as follows:

          (i)  First, to each Holder, as of the close of business on the record
     date for such Fiscal Period, an amount of Net Income equal to the excess of
     (x) the Dividends accrued on such Holder's Preferred Securities from the
     Closing Date through and including the close


                                      -11-

<PAGE>

      of business on the record date for such Fiscal Period, including any
     Additional Dividends payable with respect thereto, over (y) the amount of
     Net Income allocated to each such Holder (or predecessor thereof) pursuant
     to this Section 4.1(a)(i) in all prior Fiscal Periods, including any
     Additional Dividends payable with respect thereto.

          (ii)  Second, to each Holder, as of the close of business on the
     record date for such Fiscal Period, an amount of Net Income equal to the
     excess of (x) all Net Losses allocated to each such Holder (or predecessor
     thereof) from the date of issuance of each of such Holder's Preferred
     Securities through and including the close of such Fiscal Period pursuant
     to Section 4.1(b)(ii) over (y) the amount of Net Income allocated to such
     Holder (or predecessor thereof) pursuant to this Section 4.1(a)(ii) in all
     prior Fiscal Periods.

          (iii)  Any remaining Net Income shall be allocated to the General
     Partner.

          (b)  The Partnership's Net Loss for any Fiscal Period shall be
allocated as follows:

          (i)  First, to the General Partner until the balance of the General
     Partner's Capital Account is reduced to zero.

          (ii)  Second, among the Holders in proportion to their respective
     aggregate Capital Account balances, until the Capital Account balances of
     such Holders are reduced to zero; PROVIDED, HOWEVER, that the General
     Partner shall make appropriate adjustments in these allocations, in
     accordance with Section 4.1(c), with respect to any Preferred Securities as
     to which Net Income has been allocated with respect to Dividends that
     accrued but were not paid.

          (iii)  Any remaining Net Loss shall be allocated to the General
     Partner.

          (c)  The General Partner shall make such changes to the allocations in
Sections 4.1(a) and 4.1(b) as it deems reasonably necessary so that, in the year
of the Partnership's dissolution, winding-up or termination, amounts distributed
to the Preferred Security Holders in accordance with Section 11.4(a) shall equal
the aggregate of the stated liquidation preference of $25 per Preferred Security
and accrued and unpaid Dividends to the date of payment, including any
Additional Dividends accrued thereon (the "LIQUIDATION DISTRIBUTION"), unless,
in connection with


                                      -12-

<PAGE>

such dissolution, winding-up or termination, Subordinated Debentures in a
principal amount equal to the aggregate liquidation preference of the Preferred
Securities have been distributed on a pro rata basis to the Holders.

          Section 4.2  SPECIAL ALLOCATIONS.

          (a)  All expenditures described in Code Section 705(a)(2)(B) and
Section 9.3 hereof that are incurred by, or on behalf of, the Partnership shall
be allocated entirely to the General Partner.

          (b)  In the event any Holder unexpectedly receives any adjustments,
allocations or distributions described in Treasury Regulation
Section 1.704-1(b)(2)(ii)(d)(4), (5) or (6), items of Partnership Net Income
shall be specially allocated to such Holder in an amount and manner sufficient
to eliminate, to the extent required by the Treasury Regulations, the deficit,
if any, in the balance of the Capital Account of such Holder as quickly as
possible.  This Section 4.2(b) is intended to comply with the qualified income
offset provision in Section 1.704-1(b)(2)(ii)(d) of the Treasury Regulations.

          (c)  For purposes of determining the profits, losses or any other
items allocable to any period, profits, losses and any such other items shall be
determined on a daily, monthly or other basis, as determined by the General
Partner using any method that is permissible under Section 706 of the Code and
the Treasury Regulations promulgated thereunder.  Unless otherwise specified,
such profits, losses or other items shall be determined for each Fiscal Period.

          (d)  The Partners and Holders, by becoming parties to this Agreement,
either by execution hereof or pursuant to Section 2.9, will be deemed to be
aware of the income tax consequences of the allocations made by this Article IV
and will be deemed to have agreed to be bound by the provisions of this Article
IV in reporting their shares of Partnership Net Income and Net Loss for U.S.
federal income tax purposes.

          (e)  Notwithstanding anything to the contrary that may be expressed or
implied in this Article IV, the interest of the General Partner in each item of
income, gain, loss, deduction and credit will be equal to at least (i) at any
time that aggregate capital contributions to the Partnership are equal to or
less than $50,000,000, 1% of each such item and (ii) at any time that aggregate
capital contributions to the Partnership are greater than $50,000,000, 1% of
each such item, multiplied by a fraction (not exceeding one and not less than
0.2), the numerator of which is $50,000,000


                                      -13-

<PAGE>

 and the denominator of which is the lesser of the aggregate Capital Account
balances of the Capital Accounts of all Partners at such time and the aggregate
capital contributions to the Partnership of all Partners at such time.

          (f)  The Partners intend that the allocations under Section 4.1
conform to Treasury Regulations Sections 1.704-1(b) and 1.704-2 (including,
without limitation, the minimum gain chargeback, chargeback of partner
nonrecourse debt minimum gain, qualified income offset and partner nonrecourse
debt provisions of such Treasury Regulations), and the General Partner shall
make such changes in the allocations under Section 4.1 as it believes are
reasonably necessary to meet the requirements of such Treasury Regulations.

          (g)  Solely for the purpose of adjusting the Capital Accounts of the
Partners, and not for tax purposes, if any property is distributed in kind to
any Partner, the difference between its fair market value and its book value at
the time of distribution shall be treated as gain or loss recognized by the
Partnership and allocated pursuant to the provisions of Section 4.1.

          Section 4.3  ALLOCATIONS FOR INCOME TAX PURPOSES.  The income, gains,
losses, deductions and credits of the Partnership shall be allocated in the same
manner as the items entering into the computation of Net Income and Net Loss are
allocated under Sections 4.1 and 4.2; PROVIDED, HOWEVER, that solely for
federal, state and local income and franchise tax purposes, but not for book or
Capital Account purposes, income, gain, loss and deductions with respect to any
property properly carried on the Partnership's books at a value other than the
tax basis of such property shall be allocated in a manner determined in the
General Partner's discretion, so as to take into account (consistently with Code
Section 704(c) principles) the difference between such property's book value and
its tax basis.  Notwithstanding anything to the contrary set forth in this
Agreement, the General Partner is authorized to modify the allocations of this
Section 4.3, and Sections 4.1 and 4.2, if necessary or appropriate, in the
General Partner's sole discretion, for the allocations to fairly reflect the
economic gain, income or loss to each of the Partners, or as otherwise required
by the Code or the Treasury Regulations.

          Section 4.4  WITHHOLDING.  The Partnership shall comply with
withholding requirements under federal, state and local law and shall remit
amounts withheld to and file required forms with applicable jurisdictions.  To
the extent that the Partnership is required to withhold and pay over


                                      -14-

<PAGE>

any amounts to any authority with respect to distributions or allocations to any
Partner, the amount withheld shall be deemed to be a distribution in the amount
of the withholding to the Partner.  In the event of any claimed over-withhold-
ing, Partners shall be limited to an action against the applicable jurisdiction.
If the amount withheld was not withheld from actual distributions, the
Partnership may reduce subsequent distributions by the amount of such with-
holding.  Each Partner agrees to furnish the Partnership with any
representations and forms as shall reasonably be requested by the Partnership to
assist it in determining the extent of, and in fulfilling, its withholding
obligations.


                                    ARTICLE V

                           DIVIDENDS AND DISTRIBUTIONS

          Section 5.1  DIVIDENDS.  Limited Partners shall receive periodic
Dividends, if any, Additional Dividends, if any, redemption payments and
liquidation distributions in accordance with the terms of the Preferred
Securities set forth in Article VI.  Subject to the rights of the Preferred
Security Holders, all remaining cash shall be distributed to the General Partner
at such time as the General Partner shall determine.

          Section 5.2  LIMITATIONS ON DISTRIBUTIONS.  The Partnership shall not
make a distribution to any Partner on account of such Partner's Interest if such
distribution would violate Section 17-607 of the Act or other applicable law.


                                   ARTICLE VI

                        ISSUANCE OF PREFERRED SECURITIES

          Section 6.1  GENERAL PROVISIONS REGARDING PREFERRED SECURITIES.

          (a)  There is hereby authorized for issuance and sale Preferred
Securities having an aggregate liquidation preference not greater than
$200,000,000 and having the designation, annual Dividend rate, liquidation
preference, redemption terms and other powers, preferences and special rights
and limitations set forth in this Article VI.  The aggregate liquidation
preference of Preferred Securities authorized hereunder shall be reduced on the
Closing Date to the aggregate liquidation preference of such Preferred
Securities as shall have been purchased on the Closing Date by the Underwriters.


                                      -15-

<PAGE>


          (b)  The payment of Dividends, Additional Dividends, if any, and
payments of distributions by the Partnership in liquidation or on redemption in
respect of Preferred Securities shall be guaranteed by COMSAT pursuant to, and
to the extent provided in, the Guarantee.  The Guarantee constitutes a guarantee
of payment and not of collection.  The Holders hereby authorize the General
Partner to hold the Guarantee on behalf of the Holders.  In the event of an
appointment of a Special Representative pursuant to Section 6.2(f) to, among
other things, enforce the rights of the Holders under the Guarantee, the Special
Representative may take possession of the Guarantee for such purpose.  If no
Special Representative has been appointed to enforce the Guarantee, the General
Partner has the right to enforce the Guarantee on behalf of the Holders.  The
Holders of not less than 10% in aggregate liquidation preference of all
outstanding Preferred Securities have the right to direct the time, method and
place of conducting any proceeding for any remedy available in respect of the
Guarantee, including the giving of directions to the General Partner or the
Special Representative, as the case may be.  If the General Partner or the
Special Representative fails to enforce the Guarantee as provided above, a
Holder may institute a legal proceeding directly against the guarantor under the
Guarantee to enforce its rights under the Guarantee, without first instituting a
legal proceeding against the Partnership or any other Person.  The Preferred
Security Holders, by acceptance of such Preferred Securities, acknowledge and
agree to the subordination provisions and other terms of the Guarantee.

          (c)  The proceeds received by the Partnership from the issuance of
Preferred Securities, together with the proceeds of the capital contributed by
the General Partner pursuant to Section 3.1(a) of this Agreement, shall be
invested by the Partnership in Subordinated Debentures with (i) an aggregate
principal amount equal to such aggregate invested proceeds and (ii) an interest
rate at least equal to the Dividend rate of the Preferred Securities.

          (d)  The Partnership may not issue any other limited partnership
interests in or preferred securities of the Partnership, nor may it incur any
indebtedness.  All Preferred Securities shall rank senior to all other Interests
in the Partnership in respect of the right to receive Dividends, Additional
Dividends or other distributions (including, without limitation, any
distribution out of the assets of the Partnership upon voluntary or involuntary
liquidation, dissolution, winding-up or termination of the Partnership).  All
Preferred Securities redeemed, purchased or otherwise acquired by the
Partnership shall be canceled.  The Preferred Securities will be issued


                                      -16-

<PAGE>

in registered form only.  Dividends on all Preferred Securities shall be cumu-
lative.

          (e)  Notwithstanding that Holders of Preferred Securities are entitled
to vote or consent as provided in this Agreement, any of the Preferred
Securities that are owned by COMSAT or by any entity owned more than 50% by
COMSAT, or by any entity controlled by COMSAT, either directly or indirectly,
shall not be entitled to vote or consent and shall, for purposes of such vote or
consent, be treated as if they were not outstanding.

          (f)  No Holder shall be entitled as a matter of right to subscribe for
or purchase, or have any preemptive right with respect to, any part of any new
or additional limited partnership interests, or of securities convertible into
any Preferred Securities or other limited partnership interests, whether now or
hereafter authorized and whether issued for cash or other consideration or by
way of a Dividend.

          Section 6.2  PREFERRED SECURITIES.

          (a)  DESIGNATION.  The Preferred Securities, liquidation preference
$25 per Preferred Security, are hereby designated as "____% CUMULATIVE MONTHLY
INCOME PREFERRED SECURITIES".

          (b)  DIVIDENDS.  (i)  Preferred Security Holders shall be entitled to
receive, when, as and if available and determined to be so payable by the
General Partner, except as otherwise provided below, cumulative Dividends at a
rate per annum of ____% of the stated liquidation preference of $25 per
Preferred Security, calculated on the basis of a 360-day year consisting of 12
months of 30 days each.  For any period shorter than a full monthly Dividend
period, Dividends will be computed on the basis of the actual number of days
elapsed in such period.  Dividends shall be payable in United States dollars
monthly in arrears on the last day of each calendar month of each year,
commencing ______________, 1995.  Such Dividends will accrue and be cumulative
whether or not they have been declared and whether or not there are funds of the
Partnership legally available for the payment of Dividends.  Dividends on the
Preferred Securities shall be cumulative and shall accrue from the Closing Date.
Additional Dividends upon any Dividend arrearages shall be declared and paid in
order to provide, in effect, monthly compounding on such Dividend arrearages at
a rate of ____% per annum compounded monthly and such Additional Dividends shall
accrue.  In the event that any date on which Dividends are payable on the Pre-
ferred Securities is not a Business Day, then payment of the


                                      -17-

<PAGE>

Dividend payable on such date will be made on the next succeeding day which is
a Business Day (and without any interest or other payment in respect of any such
delay) except that, if such Business Day is in the next succeeding calendar
year, such payment shall be made on the immediately preceding Business Day, in
each case with the same force and effect as if made on such date.

          (ii)  Dividends on the Preferred Securities must be declared monthly
and be paid on the last day of each calendar month (each a "DIVIDEND PAYMENT
DATE") to the extent that the Partnership has, on such date, (x) funds legally
available for the payment of such Dividends and (y) cash on hand sufficient to
permit such payments, it being understood that to the extent that funds are not
available to pay in full all accrued and unpaid Dividends, the Partnership may
pay partial pro rata Dividends to the extent of funds legally available
therefor.  Dividends will be payable to the Holders as they appear on the books
and records of the Partnership on the relevant record dates, which will be one
Business Day prior to the relevant Dividend Payment Date.  In the event the
Preferred Securities shall not continue to remain in book-entry-only form as
described in Section 10.4 hereof, the General Partner shall have the right to
select relevant record dates, which shall be more than one Business Day prior to
the relevant Dividend Payment Date.  In the event of any extended interest
payment period with respect to the Subordinated Debentures resulting in the
deferral of the payment of Dividends on the Preferred Securities, the
Partnership shall give written notice by first-class mail to the Holders as to
such extended interest payment period no later than the last date on which it
would be required to notify the NYSE of the record or payment date of the
related Dividend on the Preferred Securities.

          (iii)  The Partnership shall not:

          (A)  pay, declare or set aside for payment, any dividends or other
     distributions on any other Interests in the Partnership; or

          (B)  redeem, purchase or otherwise acquire any other Interests in the
     Partnership;

until, in each case, such time as all accrued and unpaid Dividends on all of the
Preferred Securities, including any Additional Dividends thereon, shall have
been paid in full for all Dividend periods terminating on or prior to the date
of such payment or the date of such redemption, purchase or acquisition, as the
case may be.


                                      -18-

<PAGE>


          (c)  REDEMPTION.  (i)  The Preferred Securities are redeemable at the
option of the Partnership, in whole or in part, from time to time, on or after
__________________, at $25 per Preferred Security plus accrued and unpaid
Dividends (whether or not earned or declared) to the date fixed for redemption,
including any Additional Dividends accrued thereon (the "REDEMPTION PRICE").  In
the event that fewer than all the outstanding Preferred Securities are to be so
redeemed, the Preferred Securities to be redeemed will be selected by lot.  If a
partial redemption would result in the delisting of the Preferred Securities,
the Partnership may only redeem the Preferred Securities in whole.

          (ii)  If a Tax Event shall occur and be continuing, the General
Partner shall elect to (a) redeem the Preferred Securities in whole (and not in
part) at the Redemption Price within 90 days following the occurrence of such
Tax Event; PROVIDED that if at the time there is available to the General
Partner the opportunity to eliminate, within such 90-day period, the Tax Event
by taking some ministerial action, such as filing a form or making an election,
or pursuing some other similar reasonable measure, which has no adverse effect
on the Partnership or COMSAT, the General Partner will pursue such measure in
lieu of redemption; (b) dissolve the Partnership and cause the Subordinated
Debentures to be distributed to the Holders in liquidation of the Partnership;
or (c) cause the Preferred Securities to remain outstanding and pay Additional
Interest on the Subordinated Debentures.

          (iii)  If an Investment Company Event shall occur and be continuing,
the General Partner shall elect to either (a) redeem the Preferred Securities in
whole (and not in part) at the Redemption Price within 90 days following the
occurrence of such Investment Company Event; PROVIDED that if at the time there
is available to the General Partner the opportunity to eliminate, within such
90-day period, the Investment Company Event by taking some ministerial action,
such as filing a form or making an election, or pursuing some other similar
reasonable measure, which has no adverse effect on the Partnership or COMSAT,
the General Partner will pursue such measure in lieu of redemption; or (b)
dissolve the Partnership and cause the Subordinated Debentures to be distributed
to the Holders in liquidation of the Partnership, within 90 days following the
occurrence of such Investment Company Event.

          (iv)  Upon the repayment of the Subordinated Debentures at maturity or
upon any acceleration, earlier redemption or otherwise, the proceeds from such
repayment shall be applied to redeem the Preferred Securities, in whole, at the
Redemption Price.  In the case of any


                                      -19-

<PAGE>

redemption pursuant to this clause (iv), the Preferred Securities shall only be
redeemed when repayment of the Subordinated Debentures has actually been
received by the Partnership.

          (v)  The Partnership may not redeem fewer than all the outstanding
Preferred Securities unless all accrued and unpaid dividends have been paid on
all Preferred Securities for all monthly dividend periods terminating on or
prior to the date of redemption.

          (d)  REDEMPTION PROCEDURES.  (i)  Notice of any redemption (a "NOTICE
OF REDEMPTION") of the Preferred Securities to be redeemed pursuant to Section
6.2(c) will be given by the Partnership by first-class mail to each record
Holder not fewer than 30 nor more than 60 days prior to the date fixed for
redemption thereof.  For purposes of the calculation of the date of redemption
and the dates on which notices are given pursuant to this paragraph (d)(i), a
Notice of Redemption shall be deemed to be given on the day such notice is first
mailed by first-class mail, postage prepaid, to each Holder.  Each Notice of
Redemption shall be addressed to each Holder at the address of the Holder
appearing in the books and records of the Partnership.  If all of the Preferred
Securities are represented by Book-Entry Interests, Notices of Redemption shall
be sent to the Clearing Agency.  No defect in the Notice of Redemption or in the
mailing thereof with respect to any Preferred Security shall affect the validity
of the redemption proceedings with respect to any other Preferred Security.
Subject to the last sentence of Section 6.2(c)(iv), any Notice of Redemption
shall be irrevocable.

          (ii)  If the Partnership gives a Notice of Redemption in respect of
the Preferred Securities and all of the Preferred Securities are represented by
Book-Entry Interests, then, by 12:00 noon, New York time, on the redemption
date, the Partnership will irrevocably deposit with the Clearing Agency funds
sufficient to pay the applicable Redemption Price and will give the Clearing
Agency irrevocable instructions and authority to pay the Redemption Price to the
Holders; if all of the Preferred Securities are not represented by Book-Entry
Interests, the Partnership may pay the Redemption Price to a Holder by check
upon presentation by a Holder of the corresponding LP Certificate.  If a Notice
of Redemption shall have been given and funds deposited as required, then upon
the date of such deposit, all rights of the Preferred Security Holders who hold
such Preferred Securities so called for redemption will cease, except the right
of the Holders of such Preferred Securities to receive the Redemption Price, but
without interest on such Redemption Price.  In the event


                                      -20-

<PAGE>

that any date fixed for redemption of Preferred Securities is not a Business
Day, then payment of the Redemption Price payable on such date will be made on
the next succeeding day which is a Business Day (and without any interest or
other payment in respect of any such delay), except that, if such Business Day
falls in the next calendar year, such payment will be made on the immediately
preceding Business Day.  In the event that payment of the Redemption Price in
respect of Preferred Securities is improperly withheld or refused and not paid
either by the Partnership or by COMSAT pursuant to the Guarantee, Dividends on
such Preferred Securities (including any Additional Dividends thereon) will
continue to accrue at the then applicable rate, from the original redemption
date to the date of payment, in which case the actual payment date will be
considered the date fixed for redemption for purposes of calculating the
Redemption Price.

          (iii)  Subject to the foregoing and applicable law (including, without
limitation, United States federal securities laws), COMSAT or its subsidiaries
may at any time and from time to time purchase outstanding Preferred Securities
by tender, in the open market or by private agreement.

          (e)  LIQUIDATION RIGHTS.  In the event of any voluntary or involuntary
dissolution, winding-up or termination of the Partnership, the Holders will have
the rights provided in Section 11.4 hereof.

          (f)  VOTING RIGHTS -- SPECIAL REPRESENTATIVE.  (i) If (x) the
Partnership fails to pay Dividends in full on the Preferred Securities for 18
consecutive months, (y) an Event of Default (as defined in the Indenture) occurs
and is continuing on the Subordinated Debentures or (z) COMSAT is in default on
any of its payment or other obligations under the Guarantee, then the Holders,
upon the affirmative vote of at least a Majority in Liquidation Preference of
the Preferred Securities, will be entitled to appoint and authorize a Special
Representative to enforce the Partnership's rights as a creditor under the
Indenture and the Subordinated Debentures, to enforce the rights of the Holders
under the Guarantee and to enforce the rights of the Holders to receive
Dividends (including Additional Dividends) on the Preferred Securities.  The
Special Representative shall not be admitted as a general partner in the
Partnership or otherwise be deemed to be a general partner in the Partnership
and shall have no liability for the debts, obligations or liabilities of the
Partnership.

          (ii)  In furtherance of the foregoing, and without limiting the powers
of any Special Representative so


                                      -21-

<PAGE>

appointed and for the avoidance of any doubt concerning the powers of the
Special Representative, any Special Representative, in its own name and as
Special Representative of the Partnership, may institute a proceeding,
including, without limitation, any suit in equity, an action at law or other
judicial or administrative proceeding, to enforce the Partnership's rights
directly against COMSAT, or any other obligor in connection with such
obligations on behalf of the Partnership, and may prosecute such proceeding to
judgment or final decree, and enforce the same against COMSAT or any other
obligor in connection with such obligations and collect, out of the property,
wherever situated, of COMSAT or any such other obligor upon such obligations,
the monies adjudged or decreed to be payable in the manner provided by law.

          (iii)  For purposes of determining whether the Partnership has failed
to pay Dividends in full for 18 consecutive months, Dividends shall be deemed to
remain in arrears, notwithstanding any payments in respect thereof, until full
cumulative Dividends have been or contemporaneously are paid with respect to all
monthly Dividend periods terminating on or prior to the date of payment of such
full cumulative Dividends.  Not later than 30 days after such right to appoint a
Special Representative arises and upon not less than 15 days' written notice by
first-class mail to the Holders, the General Partner will convene a meeting for
the purpose of appointing a Special Representative.  If the General Partner
fails to convene such meeting within such 30-day period, the Holders of not less
than 10% in Liquidation Preference of the Preferred Securities will be entitled
to convene such meeting.  Except as provided herein, the provisions of Section
12.3 relating to the convening and conduct of meetings of the Partners will
apply with respect to any such meeting.  Any Special Representative so appointed
shall cease to be a Special Representative of the Partnership and the Limited
Partners if the Partnership (or COMSAT pursuant to the Guarantee) shall have
paid in full all accrued and unpaid Dividends (including any Additional
Dividends) on the Preferred Securities or such default or breach, as the case
may be, shall have been cured and COMSAT, in its capacity as the General
Partner, shall continue the business of the Partnership without dissolution.
Notwithstanding the appointment of any such Special Representative, COMSAT shall
continue as General Partner and shall retain all rights under the Indenture,
including the right to extend the interest payment period from time to time to a
period not exceeding 60 consecutive months.

          (g)  VOTING RIGHTS -- CERTAIN AMENDMENTS.  (i)  If any proposed
amendment to this Agreement provides for, or


                                      -22-

<PAGE>


the General Partner otherwise proposes to effect, (x) any action which would
adversely affect the powers, preferences or special rights of the Preferred
Securities, whether by way of amendment to this Agreement or otherwise
(including, without limitation, the authorization or issuance of any limited
partnership interests in the Partnership other than the Preferred Securities) or
(y) the dissolution, winding-up or termination of the Partnership (other than in
connection with the distribution of Subordinated Debentures upon the occurrence
of a Tax Event or Investment Company Event, or as described in Section 9.12,
then the Holders of outstanding Preferred Securities will be entitled to vote on
such amendment or proposal of the General Partner (but not on any other
amendment or proposal) and such amendment or proposal shall not be effective
except with the approval of Holders of not less than 66 2/3% in Liquidation
Preference of the Preferred Securities having a right to vote on the matter;
PROVIDED, HOWEVER, that no such approval shall be required if the dissolution,
winding-up or termination of the Partnership is proposed or initiated pursuant
to Section 11.2 hereof.

          (ii)  Any required approval of Holders may be given at a separate
meeting of such Holders convened for such purpose, at a meeting of all of the
Partners in the Partnership or pursuant to written consent.  The Partnership
will cause written notice of any meeting at which Holders are entitled to vote,
or of any matter upon which action by written consent of such Holders is to be
taken, to be mailed by first-class mail to each Holder of record of Preferred
Securities at least 15 days prior to the date of such meeting or the date by
which such action is to be taken.  Each such notice will include a statement
setting forth (x) the date of such meeting or the date by which such action is
to be taken, (y) a description of any resolution proposed for adoption at such
meeting on which such Holders are entitled to vote or of such matter upon which
written consent is sought and (z) instructions for the delivery of proxies or
consents.  No vote or consent of the Holders will be required for the
Partnership to redeem and cancel Preferred Securities in accordance with this
Agreement.

          (iii)  Except as provided in this Section 6.2, Holders shall have no
voting rights, and the Holders may not remove or replace the General Partner.


                                      -23-

<PAGE>

                                    ARTICLE VII

                      BOOKS OF ACCOUNT, RECORDS AND REPORTS

          Section 7.1   BOOKS AND RECORDS.

          (a)  Proper and complete records and books of account of the
Partnership shall be kept by the General Partner in which shall be entered fully
and accurately all transactions and other matters relative to the Partnership's
business as are usually entered into records and books of account maintained by
Persons engaged in businesses of a like character, including a Capital Account
for each Partner.  The books and records of the Partnership, together with a
copy of this Agreement and of the Certificate, shall at all times be maintained
at the principal office of the General Partner and shall be open to the
inspection and examination of the Partners or their duly authorized repre-
sentatives for a proper purpose during reasonable business hours.

          (b)  The General Partner may, for such period of time that the General
Partner deems reasonable, keep confidential from the Partners any information
with respect to the Partnership the disclosure of which the General Partner
reasonably believes is not in the best interests of the Partnership or is
adverse to the interests of the Partnership or which the Partnership or the
General Partner is required by law or by an agreement with any Person to keep
confidential.

          (c)  Within three months after the close of each Fiscal Year, the
General Partner shall transmit to each Partner a statement indicating such
Partner's share of each item of Partnership income, gain, loss, deduction or
credit for such Fiscal Year for federal income tax purposes.

          Section 7.2  ACCOUNTING METHOD.  For both financial and tax reporting
purposes and for purposes of determining profits and losses, the books and
records of the Partnership shall be kept on the accrual method of accounting
applied in a consistent manner and shall reflect all Partnership transactions
and be appropriate and adequate for the Partnership's business.  The
Partnership's taxable year shall be the calendar year.


                                      -24-

<PAGE>

                                   ARTICLE VIII

                            POWERS, RIGHTS AND DUTIES
                             OF THE LIMITED PARTNERS

          Section 8.1  LIMITATIONS.  Other than as set forth in this Agreement,
the Limited Partners shall not participate in the management or control of the
Partnership's business, property or other assets nor shall the Limited Partners
transact any business for the Partnership, nor shall the Limited Partners have
the power to act for or bind the Partnership, said powers being vested solely
and exclusively in the General Partner.  The Limited Partners shall have no
interest in the properties or assets of the General Partner, or any equity
therein, or in any proceeds of any sales thereof (which sales shall not be
restricted in any respect, by virtue of acquiring or owning an Interest in the
Partnership).

          Section 8.2  LIABILITY.  Subject to the provisions of the Act, no
Limited Partner shall be liable for the repayment, satisfaction or discharge of
any debts or other obligations of the Partnership in excess of the Capital
Account balance of such Limited Partner.

          Section 8.3  PRIORITY.  No Limited Partner shall have priority over
any other Limited Partner as to Partnership allocations or distributions.


                                   ARTICLE IX

                           POWERS, RIGHTS AND DUTIES
                             OF THE GENERAL PARTNER

          Section 9.1  AUTHORITY.  Subject to the limitations provided in this
Agreement, the General Partner shall have exclusive and complete authority and
discretion to manage the operations and affairs of the Partnership and to make
all decisions regarding the business of the Partnership.  Any action taken by
the General Partner shall constitute the act of and serve to bind the
Partnership.  In dealing with the General Partner acting on behalf of the
Partnership, no Person shall be required to inquire into the authority of the
General Partner to bind the Partnership.  Persons dealing with the Partnership
are entitled to rely conclusively on the power and authority of the General
Partner, as set forth in this Agreement.

          Section 9.2  POWERS AND DUTIES OF GENERAL PARTNER.  Except as
otherwise specifically provided herein, the General Partner shall have all
rights and powers of a general


                                      -25-

<PAGE>


partner under the Act, and shall have all authority, rights and powers in the
management of the Partnership business to do any and all other acts and things
necessary, proper, convenient or advisable to effectuate the purposes of this
Agreement, including by way of illustration but not by way of limitation, the
following:

          (a)  to secure the necessary goods and services required in performing
     the General Partner's duties for the Partnership;

          (b)  to exercise all powers of the Partnership, on behalf of the
     Partnership, in connection with enforcing the Partnership's rights under
     the Subordinated Debentures and the Guarantee;

          (c)  to issue Preferred Securities and to admit Limited Partners in
     connection therewith in accordance with this Agreement;

          (d)  to act as registrar and transfer agent for the Preferred
     Securities or designate an entity to act as registrar and transfer agent;

          (e)  to establish a record date with respect to all actions to be
     taken hereunder that require a record date be established, including with
     respect to Dividends and voting rights and to make determinations as to the
     payment of Dividends, and make or cause to be made all other required
     payments to Holders and to the General Partner;

          (f)  to open, maintain and close bank accounts and to draw checks and
     other orders for the payment of money;

          (g)  to bring or defend, pay, collect, compromise, arbitrate, resort
     to legal action, or otherwise adjust claims or demands of or against the
     Partnership;

          (h)  to deposit, withdraw, invest, pay, retain and distribute the
     Partnership's funds in a manner consistent with the provisions of this
     Agreement;

          (i)  to take all action which may be necessary or appropriate for the
     preservation and the continuation of the Partnership's valid existence,
     rights, franchises and privileges as a limited partnership under the laws
     of the State of Delaware and of each other jurisdiction in which such
     existence is necessary to protect the limited liability of the Limited
     Partners


                                      -26-

<PAGE>

      or to enable the Partnership to conduct the business in which it is
     engaged;

          (j)  to cause the Partnership to enter into and perform, on behalf of
     the Partnership, the Underwriting Agreement and to cause the Partnership to
     purchase the Subordinated Debentures without any further act, vote or
     approval of any Partner; and

          (k)  to execute and deliver any and all documents or instruments,
     perform all duties and powers and do all things for and on behalf of the
     Partnership in all matters necessary or desirable or incidental to the
     foregoing.

          Section 9.3  EXPENSES PAYABLE BY GENERAL PARTNER.  The General Partner
hereby assumes and shall be liable for the debts, obligations and liabilities of
the Partnership and agrees to pay to each Person or entity to whom the Partner-
ship is now or hereafter becomes indebted or liable, whether such indebtedness,
obligations or liabilities arise in contract, tort or otherwise, (including,
without limitation, payment obligations arising under Section 7.3 of this
Agreement, but excluding payment obligations of COMSAT to Holders of the
Preferred Securities in such Holders' capacities as Holders, such obligations
being separately guaranteed under the Guarantee) (the "BENEFICIARIES") the full
payment of such indebtedness and any and all liabilities, when and as due.  This
agreement is intended to be for the benefit of and to be enforceable by all such
Beneficiaries whether or not such Beneficiaries have received notice hereof.

          Section 9.4  LIABILITY.  Except as expressly set forth in this
Agreement, (a) the General Partner shall not be personally liable for the return
of any portion of the capital contributions (or any return thereon) of the
Limited Partners; (b) the return of such capital contributions (or any return
thereon) shall be made solely from assets of the Partnership; and (c) the
General Partner shall not be required to pay to the Partnership or to any
Limited Partner any deficit in any Limited Partner's Capital Account upon
dissolution or otherwise.  Other than as provided under the Act, no Limited
Partner shall have the right to demand or receive property other than cash for
its respective Interest in the Partnership.

          Section 9.5  EXCULPATION.

          (a)  No Covered Person shall be liable, responsible, or accountable in
damages or otherwise to the Partnership or any Limited Partner (in its capacity
as such)


                                      -27-

<PAGE>

or any Affiliate of any Limited Partner for any loss, damages or claim incurred
by reason of any act or omission performed or omitted by such Covered Person in
good faith on behalf of the Partnership and in a manner reasonably believed to
be within the scope of the authority conferred on such Covered Person by this
Agreement or by law; PROVIDED, HOWEVER, that a Covered Person shall be liable
for any such loss, damage or claim incurred by reason of such Covered Persons's
gross negligence or willful misconduct with respect to such acts or omissions.

          (b)  No Covered Person shall be deemed to have acted with gross
negligence or willful misconduct if such Covered Person relied in good faith
upon the records of the Partnership and upon such information, opinions, reports
or statements presented to the Partnership by any Person as to matters the
Covered Person reasonably believes are within such other Person's professional
or expert competence and who has been selected with reasonable care by or on
behalf of the Partnership, including information, opinions, reports or
statements as to the value and amount of the assets, liabilities, profits,
losses, or any other facts pertinent to the existence and amount of assets from
which distributions to Partners might properly be paid.

          Section 9.6  FIDUCIARY DUTY.

          (a)  To the extent that, at law or in equity, a Covered Person has
duties (including fiduciary duties) and liabilities relating thereto to the
Partnership or to any Limited Partner (in its capacity as such) or any Affiliate
of any Limited Partner, a Covered Person acting under this Agreement shall not
be liable to the Partnership or to any other Person for its good faith reliance
on the provisions of this Agreement.  The provisions of this Agreement, to the
extent that they restrict the duties and liabilities of a Covered Person
otherwise existing at law or in equity, are agreed by the parties hereto to
replace such other duties and liabilities of such Covered Person.

          (b)  Unless otherwise expressly provided herein, (i) whenever a
conflict of interest exists or arises between Persons, or (ii) whenever this
Agreement or any other agreement contemplated herein or therein provides that a
Covered Person shall act in a manner that is, or provides terms that are, fair
and reasonable to the Partnership or any Partner, the Covered Person shall
resolve such conflict of interest, taking such action or providing such terms,
considering in each case the relative interest of each party (including its own
interest) to such conflict, agreement, transaction or situation and the benefits
and burdens relating to such interests, any customary or accepted


                                      -28-

<PAGE>

industry practices, and any applicable generally accepted accounting practices
or principles.  In the absence of bad faith by the Covered Person, the
resolution, action or terms so made, taken or provided by the Covered Person
shall not constitute a breach of this Agreement or any other agreement
contemplated herein or of any duty or obligation of the Covered Person at law or
in equity or otherwise.

          (c)  Whenever in this Agreement a Covered Person is permitted or
required to make a decision (i) in its "discretion" or under a grant of similar
authority, the Covered Person shall be entitled to consider only such interests
and factors as it desires, including its own interests, and shall have no duty
or obligation to give any consideration to any interest of or factors affecting
the Partnership or any other Person, or (ii) in its "good faith" or under
another express standard, the Covered Person shall act under such express
standard and shall not be subject to any other or different standard imposed by
this Agreement or other applicable law.

          Section 9.7  [INTENTIONALLY OMITTED.]

          Section 9.8  INVESTMENT COMPANY OR TAX ACTIONS.  The General Partner
is authorized and directed to conduct its affairs and to operate the Partnership
in such a way that the Partnership would not be deemed to be an "investment
company" required to be registered under the 1940 Act or taxed as a corporation
for federal income tax purposes and so that the Subordinated Debentures will be
treated as indebtedness of COMSAT for federal income tax purposes.  In this
connection, the General Partner is authorized to take any action not
inconsistent with applicable law, the Certificate of Limited Partnership or this
Agreement, and that does not materially and adversely affect the interests of
Holders, that the General Partner determines in its discretion to be necessary
or desirable for such purposes.

          Section 9.9  OUTSIDE BUSINESSES.  Any Partner or Affiliate thereof may
engage in or possess an interest in other business ventures of any nature or
description, independently or with others, similar or dissimilar to the business
of the Partnership, and the Partnership and the Partners shall have no rights by
virtue of this Agreement in and to such independent ventures or the income or
profits derived therefrom and the pursuit of any such venture, even if
competitive with the business of the Partnership, shall not be deemed wrongful
or improper.  No Partner or Affiliate thereof shall be obligated to present any
particular investment opportunity to the Partnership even if such opportunity is
of a character that, if presented to the Partnership, could be taken by the
Partnership, and any Partner or


                                      -29-

<PAGE>

Affiliate thereof shall have the right to take for its own account (individually
or as a partner or fiduciary) or to recommend to others any such particular
investment opportunity.

               Section 9.10  LIMITS ON GENERAL PARTNER'S POWERS.

          (a)  Anything in this Agreement to the contrary notwithstanding, the
               General Partner shall not cause or permit the Partnership to:

               (i)  acquire any assets other than as expressly provided herein;

               (ii)  do any act which would make it impractical or impossible to
carry on the ordinary business of the Partnership;

               (iii)  possess Partnership property for other than a Partnership
purpose;

               (iv)  admit a Person as a Partner, except as expressly provided
in this Agreement;

               (v)  make any loans to the General Partner or its Affiliates,
other than loans represented by the Subordinated Debentures;

               (vi)  perform any act that would subject any Limited Partner to
liability as a general partner in any jurisdiction;

               (vii)  engage in any activity that is not consistent with the
purposes of the Partnership, as set forth in Section 2.3;

               (viii)  without the written consent of 66 2/3% in Liquidation
Preference of the Preferred Securities, have an order for relief entered with
respect to the Partnership or commence a voluntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, or
consent to the entry of an order for relief in an involuntary case under any
such law, or consent to the appointment of or taking possession by a receiver,
trustee or other custodian for all or a substantial part of the Partnership's
property, or make any assignment for the benefit of creditors of the
Partnership; or

               (ix)  borrow money or become liable for the borrowings of any
third party or engage in any financial or other trade or business.


                                      -30-

<PAGE>

                (b)  So long as the Subordinated Debentures are held by the
Partnership, the General Partner shall not:

               (i)  direct the time, method and place of conducting any pro-
ceeding for any remedy available to the Trustee, or exercising any trust or
power conferred on the Trustee with respect to the Subordinated Debentures,

               (ii)  waive any past default which is waivable under the
Indenture,

               (iii)  exercise any right to rescind or annul a declaration that
the principal of the Subordinated Debentures shall be due and payable,

               (iv)  consent to any amendment, modification or termination of
the Indenture, where such consent shall be required,

without, in each case, obtaining the prior approval of the Holders of not less
than 66 2/3% in Liquidation Preference of the Preferred Securities; PROVIDED,
HOWEVER, that where a consent under the Indenture would require the consent of
each holder of Subordinated Debentures affected thereby, no such consent shall
be given by the General Partner without the prior consent of each Holder of
Preferred Securities.

               (c)  The General Partner shall not revoke any action previously
authorized or approved by a vote of Holders without the approval of the Holders
of not less than 66 2/3% in Liquidation Preference of the Preferred Securities.
The General Partner shall notify all Holders of any notice of default received
from the Trustee with respect to the Subordinated Debentures.

               Section 9.11  TAX MATTERS PARTNER.

               (a)  For purposes of Code Section 6231(a)(7), the "TAX MATTERS
PARTNER" shall be the General Partner as long as it remains the general partner
of the Partnership.  The Tax Matters Partner shall keep the Limited Partners
fully informed of any inquiry, examination or proceeding.

               (b)  The General Partner shall not make an election in accordance
with Section 754 of the Code.

               (c)  The General Partner and the Preferred Security Holders
acknowledge that they intend, for U.S.  federal income tax purposes, that the
Partnership shall be treated as a partnership and that the General Partner and
the Preferred Security Holders shall be treated as Partners of such Partnership
for such purposes.


                                      -31-

<PAGE>

                Section 9.12  MERGER, CONSOLIDATION OR AMALGAMATION OF THE
PARTNERSHIP.  Except as permitted in this Section 9.12, the Partnership may not,
and the General Partner shall not permit the Partnership to, consolidate,
amalgamate, merge with or into, or be replaced by, or convey, transfer or lease
its properties and assets substantially as an entirety to any corporation or
other Person, except as described below.  The Partnership may, without the
consent of the Holders, consolidate, amalgamate, merge with or into, or be
replaced by a limited partnership, a limited liability company or a trust
organized as such under the laws of any state of the United States of America or
of the District of Columbia; PROVIDED, that (i) such successor entity either
(x) expressly assumes all of the obligations of the Partnership under the
Preferred Securities or (y) substitutes for the Preferred Securities other
securities having substantially the same terms as the Preferred Securities (the
"SUCCESSOR SECURITIES") so long as the Successor Securities rank, with respect
to participation in the profits, dividends and assets of the successor entity,
at least as high as the Preferred Securities rank with respect to participation
in the profits, Dividends and assets of the Partnership, (ii) COMSAT expressly
acknowledges such successor entity as the holder of the Subordinated Debentures,
(iii) the Preferred Securities or any Successor Securities are listed, or any
Successor Securities will be listed upon notification of issuance, on any
national securities exchange or other organization on which the Preferred
Securities are then listed, (iv) such merger, consolidation, amalgamation or
replacement does not cause the Preferred Securities (including any Successor
Securities) to be downgraded by any nationally recognized statistical rating
organization, as that term is used in Rule 15c3-1(c)(2)(vi)(F) under the
Exchange Act, (v) such merger, consolidation, amalgamation or replacement does
not adversely affect the powers, preferences and other special rights of Holders
of Preferred Securities (including  holders of any Successor Securities) in any
material respect (other than with respect to any dilution of the Holders'
interest in the new entity), (vi) such successor entity has a purpose
substantially identical to that of the Partnership, (vii) COMSAT has provided a
guarantee to the holders of the Successor Securities with respect to such
successor entity having substantially the same terms as the Guarantee, and
(viii) prior to such merger, consolidation, amalgamation or replacement, COMSAT
has received an opinion of nationally recognized independent counsel to the
Partnership experienced in such matters to the effect that (x) such successor
entity will not be treated as an association taxable as a corporation for
federal income tax purposes, (y) following such merger, consolidation,
amalgamation or replacement, neither COMSAT nor such


                                      -32-

<PAGE>

successor entity will be required to register as an investment company under the
1940 Act and (z) such merger, consolidation, amalgamation or replacement will
not adversely affect the limited liability of the Holders.


                                    ARTICLE X

                       TRANSFERS OF INTERESTS BY PARTNERS

               Section 10.1  TRANSFER OF INTERESTS.

               (a)  Preferred Securities shall be freely transferable by a
Holder.

               (b)  The General Partner may not assign its Interest in the
Partnership in whole or in part under any circumstances except to a successor of
COMSAT as permitted under the Indenture.  The admission of such successor as a
general partner of the Partnership shall be effective upon the filing of an
amendment to the Certificate with the Secretary of State of the State of
Delaware which indicates that such successor has been admitted as a general
partner in the Partnership.  If the General Partner assigns its entire Interest
to a successor of COMSAT as permitted under the Indenture, the General Partner
shall be deemed to have ceased to be a general partner in the Partnership
simultaneously with the admission of the successor as a general partner in the
Partnership and such successors assumption hereof.  Any such successor general
partner in the Partnership is hereby authorized to and shall continue the
business of the Partnership without dissolution.

               (c)  Except as provided above, no Interest shall be transferred,
in whole or in part, except in accordance with the terms and conditions set
forth in this Agreement.  Any transfer or purported transfer of any Interest not
made in accordance with this Agreement shall be null and void.

               Section 10.2  TRANSFER OF LP CERTIFICATES.  The General Partner
shall provide for the registration of LP Certificates and of transfers of LP
Certificates without charge, but upon payment (with the giving of such indemnity
as the Partnership or the General Partner may require) in respect of any tax or
other government charges that may be imposed in relation to it.  Upon surrender
for registration of transfer of any LP Certificate, the General Partner shall
cause one or more new LP Certificates to be issued in the name of the designated
transferee or transferees.  Every LP Certificate surrendered for registration of
transfer shall be accompanied by a written instrument of transfer in form
satisfactory to the General Partner duly executed by the


                                      -33-

<PAGE>

Preferred Security Holder or his or her attorney duly authorized in writing.
Each LP Certificate surrendered for registration of transfer shall be canceled
by the General Partner.  A transferee of an LP Certificate shall be admitted to
the Partnership as a Limited Partner and shall be entitled to the rights and
subject to the obligations of a Preferred Security Holder hereunder upon the
receipt by a transferee of an LP Certificate.  The Partnership will not be
required to register or cause to be registered the transfer of Preferred
Securities after such Preferred Securities have been called for redemption
pursuant to Section 6.2.

               Section 10.3  PERSONS DEEMED PREFERRED SECURITY HOLDERS.  The
Partnership may treat the Person in whose name any LP Certificate shall be
registered on the books and records of the Partnership as the sole holder of
such LP Certificate and of the Preferred Securities represented by such LP
Certificate for purposes of receiving Dividends and for all other purposes
whatsoever and, accordingly, shall not be bound to recognize any equitable or
other claim to or interest in such LP Certificate or in the Preferred Securities
represented by such LP Certificate on the part of any other Person, whether or
not the Partnership shall have actual or other notice thereof.

               Section 10.4  BOOK-ENTRY INTERESTS.  The LP Certificates, on
original issuance, will be issued in the form of a global LP Certificate or LP
Certificates representing the Book-Entry Interests, to be delivered to DTC, the
initial Clearing Agency, by, or on behalf of, the Partnership.  Such LP
Certificate or LP Certificates shall initially be registered on the books and
records of the Partnership in the name of Cede & Co., the nominee of DTC, and no
Preferred Security Owner will receive a definitive LP Certificate representing
such Preferred Security Owner's interests in such LP Certificate, except as
provided in Section 10.7.  Unless and until definitive, fully registered LP
Certificates (the "DEFINITIVE LP CERTIFICATES") have been issued to the
Preferred Security Owners pursuant to Section 10.7:

               (a)  The provisions of this Section shall be in full force and
          effect;

               (b)  The Partnership, the Special Representative and the General
          Partner shall be entitled to deal with the Clearing Agency for all
          purposes of this Agreement (including the payment of Dividends,
          Redemption Price and liquidation proceeds on the LP Certificates and
          receiving approvals, votes or consents hereunder) as the Preferred
          Security Holder and the sole holder of


                                      -34-

<PAGE>

           the LP Certificates and shall have no obligation to the Preferred
          Security Owner;

               (c)  None of the Partnership, the General Partner, any Special
          Representative or any agent of the General Partner, the Partnership or
          any Special Representative shall have any liability with respect to or
          responsibility for the records of the Clearing Agency; and

               (d)  To the extent that the provisions of this Section conflict
          with any other provisions of this Agreement, the provisions of this
          Section shall control.

               Section 10.5  NOTICES TO CLEARING AGENCY.  Whenever a notice or
other communication to the Preferred Security Holders is required under this
Agreement, unless and until Definitive LP Certificates shall have been issued to
the Preferred Security Owners pursuant to Section 10.7, the General Partner
shall give all such notices and communications specified herein to be given to
the Preferred Security Holders to the Clearing Agency, and shall have no
obligations to the Preferred Security Owners.

               Section 10.6  APPOINTMENT OF SUCCESSOR CLEARING AGENCY.  If any
Clearing Agency elects to discontinue its services as securities depository with
respect to the Preferred Securities, the General Partner may, in its sole
discretion, appoint a successor Clearing Agency with respect to the Preferred
Securities.

               Section 10.7  DEFINITIVE LP CERTIFICATES; APPOINTMENT OF PAYING
AGENT.  If (a) the Clearing Agency elects to discontinue its services as
securities depository and no successor clearinghouse is obtained within 90 days
after such discontinuance pursuant to Section 10.6 or (b) the Partnership elects
to terminate the book-entry system through the Clearing Agency, then Definitive
LP Certificates shall be prepared by the Partnership.  In each of the above
circumstances, the General Partner will appoint a paying agent to pay Dividends,
redemption payments or liquidation payments on behalf of the Partnership with
respect to the Preferred Securities.  Upon surrender of the global LP
Certificate or LP Certificates representing the Book-Entry Interests by the
Clearing Agency, accompanied by registration instructions, the General Partner
shall cause Definitive LP Certificates to be delivered to Preferred Security
Owners in accordance with the instructions of the Clearing Agency.  Neither the
General Partner nor the Partnership shall be liable for any delay in delivery of
such instructions and may conclusively rely on, and shall be


                                      -35-

<PAGE>

protected in relying on, such instructions.  Any Person receiving a Definitive
LP Certificate in accordance with this Article X shall be admitted to the
Partnership as a Limited Partner upon receipt of such Definitive LP Certificate
and shall be registered on the books and records of the Partnership as a
Preferred Security Holder.  The Clearing Agency or the nominee of the Clearing
Agency, as the case may be, shall cease to be a Limited Partner under this
Section 10.7 at the time that at least one additional Person is admitted to the
Partnership as a Limited Partner in accordance with this Section 10.7.  The
Definitive LP Certificates shall be printed, lithographed or engraved or may be
produced in any other manner as may be required by any national securities
exchange on which the Preferred Securities may be listed and is reasonably
acceptable to the General Partner, as evidenced by its execution thereof.


                                   ARTICLE XI

                            WITHDRAWAL; DISSOLUTION;
                     LIQUIDATION AND DISTRIBUTION OF ASSETS

               Section 11.1  WITHDRAWAL OF PARTNERS.  The General Partner shall
not at any time retire or withdraw from the Partnership except as otherwise
permitted hereunder.  If the General Partner retires or withdraws in
contravention of this Section 11.1, it shall indemnify, defend and hold harmless
the Partnership and the other Partners from and against any losses, expenses,
judgments, fines, settlements or damages suffered or incurred by the Partnership
or such other Partners arising out of or resulting from such retirement or
withdrawal.

               Section 11.2  DISSOLUTION OF THE PARTNERSHIP.

               (a)  The Partnership shall not be dissolved by the admission of
Partners in accordance with the terms of this Agreement.  Except as provided in
Section 11.2(b), the death, retirement, resignation, expulsion, bankruptcy or
dissolution of a Partner, or the occurrence of any other event which terminates
the Interest of a Partner in the Partnership, shall not cause the Partnership to
be dissolved and its affairs wound up so long as the Partnership at all times
has at least two Partners.  Upon the occurrence of any such event, the business
of the Partnership shall be continued without dissolution.

               (b)  The Partnership shall be dissolved and terminated and its
affairs shall be wound up upon the earliest to occur of any of the following
events:


                                      -36-

<PAGE>

                (i)  the expiration of the term of the Partnership, as provided
          in Section 2.4 of this Agreement;

               (ii)  upon the bankruptcy, insolvency or dissolution of the
          General Partner;

               (iii)  upon the assignment by the General Partner of its entire
          interest in the Partnership when the assignee is not admitted to the
          Partnership as a general partner of the Partnership in accordance with
          this Agreement, or the filing of a certificate of dissolution or its
          equivalent with respect to the General Partner, or the revocation of
          the General Partner's charter and the expiration of 90 days after the
          date of notice to the General Partner of revocation without a
          reinstatement of its charter, or any other event occurs which causes
          the General Partner to cease to be a general partner of the
          Partnership under the Act, unless the business of the Partnership is
          continued by a majority in interest of the remaining Partners in
          accordance with the Act;

               (iv)  in accordance with the provisions of the Preferred
          Securities;

               (v)  upon the entry of a decree of judicial dissolution under
          Section 17-802 of the Act; or

               (vi)  upon the written consent of all Partners.

For purposes of subparagraph (iii) above, "majority in interest" shall mean a
majority of the profits interests and a majority of the capital interests owned
by all the remaining Partners within the meaning of Rev. Proc. 94-46, 1994-28
I.R.B. 129.

               (c)  Upon dissolution of the Partnership, the Liquidator shall
promptly notify the Partners of such dissolution.

               (d)  After the date fixed for any distribution of Subordinated
Debentures upon dissolution of the Partnership, (i) the Preferred Securities
will no longer be deemed to be outstanding, (ii) DTC or its nominee, as the
record holder of the Preferred Securities, will receive a registered global
certificate or certificates representing the Subordinated Debentures to be
delivered upon such distribution, and (iii) any certificates representing
Preferred Securities not held by DTC or its nominee will be deemed to represent
Subordinated Debentures having a principal amount equal to the aggregate of the
stated liquidation preference of such Preferred Securities, with


                                      -37-

<PAGE>

accrued and unpaid interest equal to the amount of accrued and unpaid Dividends
on such Preferred Securities, until such certificates are presented to COMSAT or
its agent for transfer or reissuance.

               Section 11.3  LIQUIDATION.

               (a)  In the event of the dissolution of the Partnership for any
reason, the General Partner (or, if the Partnership is dissolved pursuant to
Section 11.2(b)(ii), then a liquidating agent appointed by Holders of not less
than 66 2/3% in Liquidation Preference of the Preferred Securities (the General
Partner or such person so appointed is hereinafter referred to as the
"LIQUIDATOR")) shall commence to wind up the affairs of the Partnership and to
liquidate the Partnership's assets; PROVIDED, HOWEVER, that a reasonable time
shall be allowed for the orderly liquidation of the assets of the Partnership
and the satisfaction of liabilities to creditors so as to enable the Partners to
minimize the normal losses attendant upon liquidation.  The Partners shall
continue to share all income, losses and distributions during the period of
liquidation in accordance with Articles IV and V.  Subject to the provisions of
this Article XI, the Liquidator shall have full right and unlimited discretion
to determine the time, manner and terms of any sale or sales of Partnership
property pursuant to such liquidation, giving due regard to the activity and
condition of the relevant market and general financial and economic conditions.

               (b)  The Liquidator shall have all of the rights and powers with
respect to the assets and liabilities of the Partnership in connection with the
liquidation and termination of the Partnership that the General Partner would
have with respect to the assets and liabilities of the Partnership during the
term of the Partnership, and the Liquidator is hereby expressly authorized and
empowered to execute any and all documents necessary or desirable to effectuate
the liquidation and termination of the Partnership and the transfer of any
assets.

               (c)  Notwithstanding the foregoing, a Liquidator that is not the
General Partner shall not be deemed a Partner in this Partnership and shall not
have any of the economic interests in the Partnership of a Partner; and such
Liquidator may be compensated for its services to the Partnership at normal
customary and competitive rates for its services to the Partnership as
reasonably proposed by the General Partner and agreed to by a Majority in
Liquidation Preference of the Preferred Securities.


                                      -38-

<PAGE>

                Section 11.4  DISTRIBUTION IN LIQUIDATION.  Subject to
Section 9.3, the proceeds of liquidation shall be applied in the following order
of priority (and without regard to the provisions of Section 17-804 of the Act):

               (a)  to creditors of the Partnership, including Preferred
          Security Holders who are creditors, to the extent otherwise permitted
          by law, in satisfaction of the liabilities of the Partnership (whether
          by payment or the making of reasonable provision for payment thereof),
          other than liabilities for distributions (including Dividends) to
          Partners; and

               (b)  following any allocations required under Section 4.1(c) of
          the Agreement, to the Partners in proportion to the Partners' positive
          Capital Account balances in accordance with Treasury Regulation
          Section 1.704-1(b)(2)(ii)(b)(2).

The distribution pursuant to this Section 11.4 may be made by distributing
Subordinated Debentures on a pro rata basis to the Holders.

               Section 11.5  RIGHTS OF LIMITED PARTNERS.  Each Limited Partner
shall look solely to the assets of the Partnership for all distributions with
respect to the Partnership and such Partner's capital contribution (including
returns thereof), and such Partner's share of profits or losses thereof, and
shall have no recourse therefor (upon dissolution or otherwise) against the
General Partner, except under the Guarantee.  No Partner shall have any right to
demand or receive property other than cash upon dissolution and termination of
the Partnership.

               Section 11.6  TERMINATION.  The Partnership shall terminate when
all of the assets of the Partnership shall have been disposed of and the assets
shall have been distributed as provided in Section 11.4.  The Liquidator shall
then execute and cause to be filed a certificate of cancellation of the
Partnership.


                                   ARTICLE XII

                             AMENDMENTS AND MEETINGS

               Section 12.1  AMENDMENTS.  Except as provided by Section 6.2(g),
this Agreement may be amended by a written instrument executed by the General
Partner without the consent of any Limited Partner; PROVIDED, HOWEVER, that no
amendment shall be made, and any such purported amendment shall be void and
ineffective, to the extent the result


                                      -39-

<PAGE>

thereof would be to cause the Partnership to be treated as anything other than a
partnership for purposes of United States income taxation or require the
Partnership to register under the 1940 Act.

               Section 12.2  AMENDMENT OF CERTIFICATE.  In the event this
Agreement shall be amended pursuant to Section 12.1, the General Partner shall
amend the Certificate to reflect such change if it deems such amendment of the
Certificate to be necessary or appropriate.

               Section 12.3  MEETINGS OF PARTNERS.

               (a)  Meetings of the Limited Partners who are Holders may be
called at any time by the General Partner to consider and act on any matter on
which Limited Partners are entitled to act under the terms of this Agreement or
the       Act.  The General Partner shall call a meeting of Holders if directed
to do so by Holders of not less than 10% in Liquidation Preference as permitted
by this Agreement.  Such direction shall be given by delivering to the General
Partner a request in writing stating that the signing Limited Partners desire to
call a meeting and indicating the general or specific purpose for which the
meeting is to be called.

               (b)  Unless otherwise specified herein, notice of any such
meeting shall be given to all Partners not less than seven (7) Business Days nor
more than 60 days prior to the date of such meeting.  Each such notice shall set
forth the date, time and place of the meeting, a description of any matter on
which Holders are entitled to vote and instructions for the delivery of proxies
or written consents.

               (c)  Any action that may be taken at a meeting of the Limited
Partners may be taken without a meeting if a consent in writing setting forth
the action so taken is signed by Limited Partners owning not less than the
minimum Interests that would be necessary to authorize or take such action at a
meeting in which all Limited Partners having a right to vote thereon were
present and voting.  Prompt notice of the taking of action without a meeting
shall be given to the Limited Partners entitled to vote who have not consented
in writing.  The General Partner may provide that any written ballot submitted
to the Limited Partners for the purpose of taking any action without a meeting
shall be returned to the Partnership within a specified time.

               (d)  Each Partner may authorize any Person to act for it by proxy
on all matters as to which a Partner is entitled to participate, including
waiving notice of any


                                      -40-

<PAGE>

meeting, or voting or participating at a meeting.  Every proxy must be signed by
the Partner or its attorney-in-fact.  No proxy shall be valid after the
expiration of 11 months from the date thereof unless otherwise provided in the
proxy.  Every proxy shall be revocable at the pleasure of the Partner executing
it.

               (e)  Each meeting of Partners shall be conducted by the General
Partner or by such other Person that the General Partner may designate.

               (f)  The General Partner may establish all other  reasonable
procedures relating to meetings of Partners or the giving of written consents,
in addition to those expressly provided, including notice of time, place or
purpose of any meeting at which any matter is to be voted on by any Partners,
waiver of any such notice, action by consent without a meeting, the
establishment of a record date, quorum requirements, voting in person or by
proxy or any other matter with respect to the exercise of any such right to
vote.


                                  ARTICLE XIII

                                  MISCELLANEOUS

               Section 13.1  NOTICES.  All notices provided for in this
Agreement shall be in writing, and shall be delivered or mailed by first class
or registered or certified mail or, with respect to the Partnership and General
Partner, telecopied, as follows:

               (a)  if given to the Partnership, in care of the General Partner
          at the Partnership's mailing address set forth below:

                    COMSAT Capital I, L.P.
                    c/o COMSAT Corporation
                    6560 Rock Spring Drive
                    Bethesda, Maryland  20817-1146
                    Attention:  Chief Financial Officer
                    Telecopy:  (301) 214-7132

               (b)  if given to the General Partner, at its mailing address set
          forth below:

                    COMSAT Corporation
                    6560 Rock Spring Drive
                    Bethesda, Maryland  20817-1146
                    Attention:  Chief Financial Officer
                    Telecopy:  (301) 214-7132


                                      -41-

<PAGE>


               (c)  if given to any other Partner, at the address set forth on
          the books and records of the Partnership.

          All such notices shall be deemed to have been given when received.

               Section 13.2  POWER OF ATTORNEY.  Each Holder does hereby
constitute and appoint the General Partner and, if applicable, any Special
Representative, as its true and lawful representative and attorney-in-fact, in
its name, place and stead to make, execute, sign, deliver and file (a) any
amendment of the Certificate required because of an amendment of this Agreement
or in order to effect any change in the Partnership, (b) this Agreement, (c) any
amendments to this Agreement and (d) all such other instruments, documents and
certificates which from time to time may required by the laws of the United
States of America, the State of Delaware or any other jurisdiction, or any
political subdivision or agency thereof, to effectuate, implement and continue
the valid and subsisting existence of the Partnership or to dissolve the
Partnership for any other purpose consistent with this Agreement and the
transactions contemplated hereby.

               The power of attorney granted hereby is coupled with an interest
and shall (a) survive and not be affected by the subsequent death, incapacity,
disability, dissolution, termination, or bankruptcy of the Holder granting the
same or the transfer of all or any portion of such Holder's Interest and
(b) extend to such Holder's successors, assigns and legal representatives.

               Section 13.3  ENTIRE AGREEMENT.  This Agreement constitutes the
entire agreement among the parties.  It supersedes any prior agreement or
understandings among them, and it may not be modified or amended in any manner
other than as set forth herein.

               SECTION 13.4  GOVERNING LAW.  THIS AGREEMENT AND THE RIGHTS OF
THE PARTIES HEREUNDER SHALL BE GOVERNED BY AND INTERPRETED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF DELAWARE AND ALL RIGHTS AND REMEDIES SHALL BE GOVERNED
BY SUCH LAWS WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS.

               Section 13.5  EFFECT.  Except as herein otherwise specifically
provided, this Agreement shall be binding upon and inure to the benefit of the
parties and their legal representatives, successors and assigns.

               Section 13.6  PRONOUNS AND NUMBER.  Wherever from the context it
appears appropriate, each term stated in either the singular or the plural shall
include the singular


                                      -42-

<PAGE>

and the plural, and pronouns stated in either the masculine, feminine or neuter
shall include the masculine, feminine and neuter.

               Section 13.7  CAPTIONS.  Captions contained in this Agreement are
inserted only as a matter of convenience and in no way define, limit or extend
the scope or intent of this Agreement or any provisions hereof.

               Section 13.8  PARTIAL ENFORCEABILITY.  If any provision of this
Agreement, or the application of such provision to any Person or circumstance,
shall be held invalid, the remainder of this Agreement, or the application of
such provision to persons or circumstances other than those to which it is held
invalid, shall not be affected thereby.

               Section 13.9  COUNTERPARTS.  This Agreement may contain more than
one counterpart of the signature page and this Agreement may be executed by the
affixing of the signature of each of the Partners to one of such counterpart
signature pages.  All of such counterpart signatures pages shall be read as
though one, and they shall have the same force and effect as though all of the
signers had signed a single signature page.

               Section 13.10  WAIVER OF PARTITION.  Each Limited Partner hereby
irrevocably waives any and all rights (if any) that such Limited Partner may
have to maintain any action for partition of any of the Partnership's property.

               Section 13.11  REMEDIES.  The failure of any party to seek
redress for violation of, or to insist upon the strict performance of, any
provision of this Agreement shall not prevent a subsequent act, which would have
originally constituted a violation, from having the effect of an original
violation.  The rights and remedies provided by this Agreement are cumulative
and the use of any one right or remedy by any party shall not preclude or waive
its right to use any or all other remedies.  Said rights and remedies are given
in addition to any other rights the parties may have by law, statute, ordinance
or otherwise.


                                      -43-

<PAGE>

                IN WITNESS WHEREOF, the parties hereto have executed this
Amended and Restated Agreement of Limited Partnership as of the date first above
stated.


                              GENERAL PARTNER:

                              COMSAT Corporation, a District of Columbia
                              corporation


                              By:
                                 ---------------------------
                                 Bruce L. Crockett
                                 President and Chief
                                 Executive Officer


                              INITIAL LIMITED PARTNER:

                              COMSAT SPV, Inc.,
                                 a Delaware corporation


                              By:
                                 ---------------------------
                                 Bruce L. Crockett
                                 President


                              PARTNERSHIP:

                              COMSAT Capital I, L.P.,
                                   a Delaware limited partnership


                              By:  COMSAT Corporation, General
                                    Partner


                              By:
                                 ---------------------------
                                 Bruce L. Crockett
                                 President


                                      -44-

<PAGE>

                                                                       Annex A


[IF A GLOBAL LP CERTIFICATE ADD --
          Unless this certificate is presented by an authorized representative
          of The Depository Trust Company, a New York Corporation ("DTC"), to
          COMSAT Capital I, L.P. or its agent for registration of transfer,
          exchange, or payment, and any certificate issued is registered in the
          name of Cede & Co. (or in such other name as is requested by an
          authorized representative of DTC), ANY TRANSFER, PLEDGE, OR OTHER USE
          HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch
          as the registered owner hereof, Cede & Co., has an interest herein.]

- -------------------------------------------------------------------------------
             Certificate Number       Number of Preferred Securities
- -------------------------------------------------------------------------------
                    R-1
- -------------------------------------------------------------------------------


                                                            CUSIP NO. 205930209


                   Certificate Evidencing Preferred Securities


                                       of


                             COMSAT Capital I, L.P.


              _____% Cumulative Monthly Income Preferred Securities
               (liquidation preference $25 per Preferred Security)


               COMSAT Capital I, L.P., a limited partnership formed under the
laws of the State of Delaware (the "Partnership"), hereby certifies that _____
(the "Holder") is the registered owner of _______ preferred securities of the
Partnership representing limited partnership interests in the Partnership, which
are designated the _____% Cumulative Monthly Income Preferred Securities
(liquidation preference $25 per Preferred Security) (the "Preferred
Securities").  The Preferred Securities are fully paid and are nonassessable
interests in the Partnership, as to which the Partners in the Partnership who
hold the Preferred Securities (the "Preferred Security Holders"), in their


                                       A-1

<PAGE>

capacities as Partners in the Partnership, will have no liability solely by
reason of being Preferred Security Holders (subject to the obligation of a
Preferred Security Holder to repay any funds wrongfully distributed to it), and
are freely transferable on the books and records of the Partnership, in person
or by a duly authorized attorney, upon surrender of this certificate duly
endorsed and in proper form for transfer accompanied by a written instrument of
transfer in form satisfactory to COMSAT Corporation, a District of Columbia
corporation ("COMSAT"), duly executed by the Preferred Security Holder or a duly
authorized attorney.  The powers, preferences and special rights and limitations
of the Preferred Securities are set forth in, and this certificate and the
Preferred Securities represented hereby are issued and shall in all respects be
subject to the terms and provisions of, the Amended and Restated Limited
Partnership Agreement of the Partnership dated as of __________, 1995, as the
same may be amended from time to time in accordance with its terms (the "Limited
Partnership Agreement"), authorizing the issuance of the Preferred Securities
and determining the powers, preferences and other special rights and
limitations, regarding Dividends, voting, return of capital and otherwise, and
other matters relating to the Preferred Securities.  Capitalized terms used
herein but not defined herein shall have the meaning given them in the Limited
Partnership Agreement.  The Holder is entitled to the benefits of the Guarantee
Agreement of COMSAT, dated as of _______________, 1995 (the "Guarantee") to the
extent provided therein.  The Partnership will furnish a copy of the Limited
Partnership Agreement and the Guarantee to the Holder without charge upon
written request to the Partnership at its principal place of business or
registered office.

               The Holder, by accepting this certificate, is deemed to have
agreed (i) to be bound by the provisions of the Limited Partnership Agreement
and (ii) that the Subordinated Debentures acquired by the Partnership with the
proceeds from the issuance of the Preferred Securities are subordinated and
junior in right of payment to all Senior Indebtedness of COMSAT as and to the
extent provided in the Subordinated Debentures and (iii) that the Guarantee
ranks (x) subordinate and junior in right of payment to all liabilities of
COMSAT, (y) PARI PASSU with the most senior preferred or preference stock now or
hereafter issued by COMSAT and with any guarantee now or hereafter entered into
by COMSAT in respect of any preferred or preference stock or preference
securities of any Affiliate of COMSAT, and (z) senior to COMSAT Common Stock and
any other class or series of capital stock of COMSAT or any of its Affiliates
which by its express terms ranks junior in the payment of dividends and amounts
on liquidation, dissolution, and winding-up to


                                       A-2

<PAGE>

the Preferred Securities, in each case, as and to the extent provided in the
Guarantee.  Upon receipt of this certificate, the Holder is admitted to the
Partnership as a Limited Partner, is bound by the Limited Partnership Agreement
and is entitled to the benefits thereunder.

               IN WITNESS WHEREOF, this certificate has been executed on behalf
of the Partnership by its duly authorized General Partner and countersigned by a
duly authorized officer of each of COMSAT Corporation, as Guarantor, and The
First National Bank of Chicago, as Registrar and Transfer Agent this _____ day
of _________________, ____.


                              COMSAT CAPITAL I, L.P.


                              By:  COMSAT CORPORATION,
                                     its General Partner


                              By:
                                 ---------------------------
                                 Name:
                                 Title:


                              COMSAT CORPORATION,
                                as Guarantor


                              By:
                                 ---------------------------
                                 Name:
                                 Title:


Registered and Countersigned by
THE FIRST NATIONAL BANK OF CHICAGO


By:
   ---------------------------
      Authorized Signature


                                       A-3

<PAGE>




<PAGE>

                                                                    EXHIBIT 4(h)
                                                           Draft of July 5, 1995


                               GUARANTEE AGREEMENT


          GUARANTEE AGREEMENT (this "Guarantee"), dated as of
___________________, 1995 is executed and delivered by COMSAT Corporation, a
corporation organized under the laws of the District of Columbia ("COMSAT"), for
the benefit of the Holders (as hereinafter defined) from time to time of the
Preferred Securities (as hereinafter defined) of COMSAT Capital I, L.P., a
Delaware limited partnership ("COMSAT Capital" or the "Partnership").

          WHEREAS, COMSAT Capital is issuing up to 8,000,000 of its  ______%
Cumulative Monthly Income Preferred Securities, with a liquidation preference of
$25 each (the "Preferred Securities"), and COMSAT desires to issue this
Guarantee for the benefit of the Holders, as provided herein;

          WHEREAS, COMSAT Capital will purchase the Subordinated Debentures (as
hereinafter defined) issued pursuant to the Indenture (as hereinafter defined)
with the proceeds from the issuance and sale of the Preferred Securities and its
other partnership interests (the "Partnership Interests"); and

          WHEREAS, COMSAT desires hereby unconditionally and irrevocably to
agree, to the extent set forth herein, to pay to the Holders the Guarantee
Payments (as hereinafter defined) and to perform the other obligations set forth
herein.

          NOW, THEREFORE, in consideration of the purchase by each Holder of
Preferred Securities, which purchase COMSAT hereby agrees shall benefit COMSAT,
COMSAT executes and delivers this Guarantee for the benefit of the Holders.


1.        DEFINITIONS.

          As used in this Guarantee, the terms set forth below shall, unless the
context otherwise requires, have the following meanings.  Capitalized terms used
herein but not otherwise defined herein shall have the meanings ascribed to such
terms in the Amended and Restated Agreement of Limited Partnership of
COMSAT Capital I, L.P., dated as of ___________________, 1995 (the "Limited
Partnership Agreement").

          1.1   "Additional Dividends" means Dividends (as defined herein) that
shall accumulate on any Dividend arrearages

<PAGE>

in respect of the Preferred Securities at the rate of ______% per annum,
compounded monthly.

          1.2   "Dividends" means the cumulative cash distributions from the
Partnership with respect to the Preferred Securities, accumulating from
__________________, 1995 and payable monthly in arrears on the last day of each
calendar month of the year, commencing __________________, 1995.

          1.3   "General Partner" means COMSAT in its capacity as general
partner in COMSAT Capital or any permitted successor general partner in COMSAT
Capital admitted as such pursuant to the applicable provisions of the Limited
Partnership Agreement.

          1.4   "Guarantee Payments" shall mean the following payments, without
duplication, to the extent not paid by COMSAT Capital:  (a) any accrued and
unpaid Dividends (including any Additional Dividends accrued thereon) to the
extent such Dividends have been declared by COMSAT Capital on the Preferred
Securities out of moneys held by COMSAT Capital and legally available therefor;
(b) the Redemption Price (as defined herein) (including all accrued and unpaid
Dividends) payable out of funds legally available therefor with respect to any
Preferred Securities called for redemption by COMSAT Capital; and (c) upon a
liquidation of COMSAT Capital, the lesser of (i) the Liquidation Distribution
(as defined herein) and (ii) the amount of assets of COMSAT Capital remaining
available for distribution to Holders in liquidation of COMSAT Capital, except
in the event that a Tax Event or an Investment Company Event has occurred and
the General Partner has elected to dissolve COMSAT Capital and cause the
Subordinated Debentures to be distributed to the Holders in liquidation of
COMSAT Capital as provided in Clauses (ii) or (iii) of Section 6.2(c) of the
Limited Partnership Agreement.

          1.5   "Holder" shall mean the registered holder from time to time of
any Preferred Securities of COMSAT Capital; PROVIDED, HOWEVER, that in
determining whether the Holders of the requisite percentage of Preferred
Securities have given any request, notice, consent or waiver hereunder, "Holder"
shall not include, and outstanding liquidation preference shall not include the
liquidation preference of Preferred Securities held by, COMSAT or any Subsidiary
thereof, either directly or indirectly.

          1.6   "Indenture" shall mean the Indenture, dated as of
__________________, 1995, between COMSAT and The First National Bank of Chicago,
as trustee, relating to the Subordinated Debentures.

          1.7   "Liquidation Distribution" shall mean the aggregate of the
stated liquidation preference of $25 per Preferred Security, plus all accrued
and unpaid Dividends on the


                                       -2-

<PAGE>

Preferred Securities to the date of payment, including any Additional Dividends
accrued thereon.

          1.8   "Redemption Price" shall have the meaning ascribed to such term
in the Limited Partnership Agreement.

          1.9   "Special Representative" shall mean a special representative
appointed by the Holders of the Preferred Securities pursuant to Section 6.2(f)
of the Limited Partnership Agreement.

          1.10  "Subordinated Debentures" shall mean the ______% Junior
Subordinated Deferrable Interest Debentures issued pursuant to the Indenture.

          1.11  "Subsidiary" of any Person means an entity more than 50% of the
outstanding voting stock of which is owned, directly or indirectly, by such
Person or by one or more other Subsidiaries, or by such Person and one or more
other Subsidiaries.  For the purposes of this definition, "voting stock" means
stock which ordinarily has voting power for the election of directors, whether
at all times or only so long as no senior class of stock has such voting power
by reason of any contingency.


2.        GUARANTEE.

          2.1   GENERAL.  COMSAT irrevocably and unconditionally agrees to pay
in full to the Holders the Guarantee Payments, as and when due (except, subject
to the proviso in Section 2.7 hereof, to the extent paid by COMSAT Capital),
regardless of any defense, right of set-off or counterclaim which COMSAT Capital
may have or assert.  This Guarantee is continuing, irrevocable, unconditional
and absolute.  COMSAT's obligation to make a Guarantee Payment may be satisfied
by direct payment of the required amounts by COMSAT to the Holders or by causing
COMSAT Capital to pay such amounts to the Holders.

          2.2   WAIVER OF CERTAIN RIGHTS.  COMSAT hereby waives notice of
acceptance of this Guarantee and of any liability to which it applies or may
apply, presentment, demand for payment, protest, notice of nonpayment, notice of
dishonor, notice of redemption and all other notices and demands.

          2.3   OBLIGATIONS NOT AFFECTED.  The obligations, covenants,
agreements and duties of COMSAT under this Guarantee shall in no way be affected
or impaired by reason of the happening from time to time of any of the
following:

                (a) the release or waiver, by operation of law or otherwise, of
          the performance or observance by


                                       -3-

<PAGE>

          COMSAT Capital of any express or implied agreement, covenant, term or
          condition relating to the Preferred Securities to be performed or
          observed by COMSAT Capital;

                (b) the extension of time for the payment by COMSAT Capital of
          all or any portion of the Dividends (including any Additional
          Dividends), Redemption Price, Liquidation Distribution or any other
          sums payable under the terms of the Preferred Securities or the
          extension of time for the performance of any other obligation under,
          arising out of, or in connection with, the Preferred Securities;

                (c) any failure, omission, delay or lack of diligence on the
          part of the Holders or the Special Representative to enforce, assert
          or exercise any right, privilege, power or remedy conferred on such
          Holders or such Special Representative pursuant to the terms of the
          Preferred Securities or the Limited Partnership Agreement, or any
          action on the part of the Holders, the Special Representative or
          COMSAT Capital granting or consenting to indulgence or extension of
          any kind;

                (d) the voluntary or involuntary liquidation, dissolution,
          winding-up, sale of any collateral, receivership, insolvency,
          bankruptcy, assignment for the benefit of creditors, reorganization,
          arrangement, composition or readjustment of debt of, or other similar
          proceedings affecting, COMSAT Capital or any of the assets of COMSAT
          Capital;

                (e) any invalidity of, or defect or deficiency in, any of the
          Preferred Securities; or

                (f) the settlement or compromise of any obligation guaranteed
          hereby or hereby incurred.

There shall be no obligation of the Holders to give notice to, or obtain any
consent of, COMSAT with respect to the happening of any of the foregoing.

          2.4   GUARANTOR, SPECIAL REPRESENTATIVE OR HOLDERS MAY PROCEED
DIRECTLY AGAINST COMSAT.  This Guarantee is a guarantee of payment and not of
collection.  This Guarantee will be deposited with the General Partner to be
held for the benefit of the Holders.  In the event of an appointment of a
Special Representative pursuant to the Limited Partnership Agreement to, among
other things, enforce the rights of the Holders under this Guarantee, the
Special Representative may take possession of this Guarantee for such purpose.
If no Special Representative has



                                       -4-

<PAGE>

been appointed to enforce this Guarantee, the General Partner has the right to
enforce this Guarantee on behalf of the Holders.  The Holders of not less than
10% in liquidation preference of all outstanding Preferred Securities have the
right to direct the time, method and place of conducting any proceeding for any
remedy available in respect of this Guarantee, including the giving of
directions to the General Partner or the Special Representative, as the case may
be.  If the General Partner or the Special Representative fails to enforce this
Guarantee as provided above, any Holder may enforce this Guarantee directly
against COMSAT as guarantor, and COMSAT waives any right or remedy to require
that any action be brought against COMSAT Capital or any other person or entity
before proceeding against COMSAT.  Subject to Section 2.5 hereof, all waivers
herein contained shall be without prejudice to the right of a Holder or the
Special Representative, at its option, to proceed against COMSAT Capital,
whether by separate action or by joinder.  COMSAT agrees that this Guarantee
shall not be discharged except by payment of the Guarantee Payments in full (to
the extent not previously paid by COMSAT Capital, but subject to the proviso in
Section 2.7 hereof) and by complete performance of all obligations under this
Guarantee.

          2.5   SUBROGATION.  COMSAT shall be subrogated to all (if any) rights
of the Holders against COMSAT Capital in respect of any amounts paid to the
Holders by COMSAT under this Guarantee and shall have the right to waive payment
of any amount of Dividends in respect of which payment has been made to the
Holders by COMSAT pursuant to Section 2.1 hereof; PROVIDED, HOWEVER, that COMSAT
shall not (except to the extent required by mandatory provisions of law)
exercise any rights which it may acquire by way of subrogation or any indemnity,
reimbursement or other agreement, in all cases as a result of a payment under
this Guarantee, if, at the time of any such payment, any amounts are due and
unpaid under this Guarantee.  If any amount shall be paid to COMSAT in violation
of the preceding sentence, COMSAT agrees to hold such amount in trust for the
Holders and to pay over such amount to the Holders.

          2.6   INDEPENDENT OBLIGATIONS.  COMSAT acknowledges that its
obligations hereunder are independent of the obligations of COMSAT Capital with
respect to the Preferred Securities and that COMSAT shall be liable as principal
and sole debtor under this Guarantee to make Guarantee Payments pursuant to the
terms of this Guarantee notwithstanding the occurrence of any event referred to
in subsections (a) through (f), inclusive, of Section 2.3 hereof.

          2.7   TERMINATION.  This Guarantee shall terminate as to each Holder
and be of no further force and effect upon full payment of the Redemption Price
of all Preferred Securities held by such Holder and will terminate completely
upon full payment of


                                       -5-

<PAGE>

the amounts payable upon liquidation of COMSAT Capital; PROVIDED, HOWEVER, that
this Guarantee shall continue to be effective or shall be reinstated, as the
case may be, if at any time any Holder must restore payment of any sums paid
under the Preferred Securities or under this Guarantee for any reason
whatsoever.


3.        CERTAIN COVENANTS OF COMSAT.

          3.1   DIVIDENDS AND OTHER PAYMENTS.  So long as any Preferred
Securities remain outstanding, COMSAT will not declare or pay any dividend on,
or redeem, purchase, acquire or make a liquidation payment with respect to, any
of its capital stock (other than as a result of a reclassification of capital
stock or the exchange or conversion of one class or series of capital stock for
another class or series of capital stock) or make any guarantee payments with
respect to the foregoing, if at such time (a) COMSAT has exercised its option to
defer interest payments on the Subordinated Debentures and such deferral is
continuing, (b) COMSAT shall be in default with respect to its payment or other
obligations hereunder, or (c) there shall have occurred any event that, with the
giving of notice or the lapse of time or both, would constitute an Event of
Default under the Indenture.

          3.2   CERTAIN OTHER COVENANTS.  COMSAT covenants that, so long as any
Preferred Securities remain outstanding, it shall:  (a) maintain direct 100%
ownership of the Partnership Interests and any other interests in COMSAT Capital
other than the Preferred Securities (except as permitted in the Limited
Partnership Agreement); (b) cause at least 3% of the total value of COMSAT
Capital and at least 3% of all interest in the capital, income, gain, loss,
deduction and credit of COMSAT Capital to be held by COMSAT as General Partner;
(c) not voluntarily dissolve, wind up or liquidate itself or COMSAT Capital; (d)
remain the General Partner of COMSAT Capital and timely perform all of its
duties as General Partner (including the duty to cause COMSAT Capital to declare
and pay dividends on the Preferred Securities), unless a permitted successor
General Partner is appointed pursuant to the Limited Partnership Agreement; and
(e) subject to the terms of the Preferred Securities, use reasonable efforts to
cause COMSAT Capital to remain a Delaware limited partnership and otherwise
continue not to be treated as an association taxable as a corporation for United
States federal income tax purposes, except, in all cases, in connection with
certain mergers, consolidations or amalgamations permitted by the Limited
Partnership Agreement.


4.        SUBORDINATION.

          4.1   SUBORDINATION.  COMSAT covenants and agrees, and each Holder by
his or her acceptance of such Preferred Securities


                                       -6-

<PAGE>

shall be deemed to acknowledge and agree that for all purposes (including any
bankruptcy, insolvency, or reorganization of COMSAT) this Guarantee constitutes
an unsecured obligation of COMSAT ranking (i) subordinate and junior in right of
payment to all liabilities of COMSAT, (ii) PARI PASSU with the most senior
preferred or preference stock now or hereafter issued by COMSAT and with any
guarantee now or hereafter entered into by COMSAT in respect of any preferred or
preference stock or preferred securities of any affiliate of COMSAT and (iii)
senior to COMSAT Common Stock.


5.        MISCELLANEOUS.

          5.1   THIRD PARTY BENEFICIARIES.  Subject to the limitations of
Section 2.4, all of COMSAT's obligations under this Guarantee shall be directly
enforceable by the Holders from time to time of the Preferred Securities.  Each
Holder is an intended third-party beneficiary of this Guarantee.

          5.2   SUCCESSORS AND ASSIGNS.  All guarantees and agreements contained
in this Guarantee shall bind the successors, assigns, receivers, trustees and
representatives of COMSAT and shall inure to the benefit of the Holders then
outstanding.  Except as permitted by Section 5.4 hereof, COMSAT shall not assign
its rights or delegate its obligations hereunder without the prior approval of
the Holders of not less than 66-2/3% of the aggregate liquidation preference of
the Preferred Securities then outstanding.

          5.3   AMENDMENTS.  Except with respect to any changes which do not
adversely affect the rights of Holders (in which case no vote will be required),
this Guarantee may only be amended with the prior approval of the Holders of not
less than 66-2/3% of the aggregate liquidation preference of the Preferred
Securities then outstanding, which approval shall be obtained as described in
the Limited Partnership Agreement.

          5.4   CONSOLIDATION, MERGER OR SALE OF ASSETS.  COMSAT, without the
consent of any Holders, may merge or consolidate with or into another entity or
may permit another entity to merge or consolidate with or into COMSAT, and may
sell, transfer or lease all or substantially all of COMSAT's assets to another
entity, if (a) at such time no Event of Default (as defined in the Indenture)
shall have occurred and be continuing, or would occur as a result of such
merger, consolidation or sale, transfer or lease and (b) the survivor of such
merger or consolidation or entity to which COMSAT assets are sold, transferred
or leased is an entity organized under the laws of the United States or any
state thereof or the District of Columbia, becomes the General Partner (if
COMSAT is then the General Partner), assumes all of COMSAT's obligations under
this Guarantee and has a net worth


                                       -7-

<PAGE>

equal to at least 10% of the total capital contributions to COMSAT Capital.

          5.5   NOTICES.  Any notice, request or other communication required or
permitted to be given hereunder to COMSAT shall be given in writing by
delivering the same against receipt therefor by registered mail, hand delivery,
facsimile transmission (confirmed by registered mail) or telex, addressed to
COMSAT, as follows (and if so given, shall be deemed given when mailed; upon
receipt of facsimile confirmation, if sent by facsimile transmission; or upon
receipt of an answer-back, if sent by telex):

          COMSAT Corporation
          6560 Rock Spring Drive
          Bethesda, Maryland  20817
          Attention:  Chief Financial Officer
          Telecopy:  (301) 214-7132

          Any notice, request or other communication required or permitted to be
given hereunder to the Holders shall be given by COMSAT in the same manner as
notices are sent by COMSAT Capital to the Holders.

          5.6   GENDERS.  The masculine and neuter genders used herein shall
include the masculine, feminine and neuter genders.

          5.7   GUARANTEE NOT SEPARATELY TRANSFERABLE.  This Guarantee is solely
for the benefit of the Holders and is not separately transferable from the
Preferred Securities.

          5.8   GOVERNING LAW.  THIS GUARANTEE SHALL BE GOVERNED BY AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

          5.9   SEVERABILITY.  In case any provision of this Guarantee shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

          5.10  HEADINGS.  The article and section headings herein are for
convenience only and shall not affect the construction hereof.


                                       -8-

<PAGE>

          IN WITNESS WHEREOF, COMSAT has caused this Guarantee to be duly
executed as of the day and year first above written.

                              COMSAT Corporation


                              By:
                                  -----------------------------
                                  Bruce L. Crockett
                                  President and Chief Executive
                                    Officer


ATTEST:


- -------------------------
Secretary

<PAGE>

                                                                    Exhibit 5(a)


                               COMSAT CORPORATION
                             6560 ROCK SPRING DRIVE
                            BETHESDA, MARYLAND 20817
                                 (301) 214-3000


                                  July 7, 1995


COMSAT Corporation
6560 Rock Spring Drive
Bethesda, Maryland  20817

Ladies and Gentlemen:

     I am Vice President, General Counsel and Secretary of COMSAT Corporation.
I have examined the Registration Statement, as filed on June 2, 1995 and amended
on July 7, 1995 (the "Registration Statement"), of COMSAT Corporation (the
"Corporation") and COMSAT Capital I, L.P. ("COMSAT Capital") on Form S-3 for the
registration under the Securities Act of 1933, as amended (the "Act"), of
$200,000,000 aggregate amount of (i) preferred securities (the "Preferred
Securities") of COMSAT Capital, (ii) junior subordinated debentures of the
Corporation (the "Debt Securities") and (iii) a guarantee of the Corporation
with respect to the Preferred Securities (the "Guarantee").  I have also
examined the Corporation's Articles of Incorporation, as amended, and such
corporate records and other documents as I have deemed necessary to enable me to
express the opinions with respect to the Debt Securities and the Guarantee set
forth below.

In my opinion,

          1.   When (i) the Registration Statement shall have become effective
     under the Act and (ii) the Indenture (the "Indenture"), between the
     Corporation and The First National Bank of Chicago, as Trustee (the
     "Trustee"), substantially in the form of Exhibit 4(c) to the Registration
     Statement and any supplements and amendments thereto, shall have been
     qualified under the Trust Indenture Act of 1939, as amended, and duly
     executed and delivered by the Corporation and the Trustee, the Debt
     Securities, upon their issuance and sale in the manner contemplated in the
     Registration Statement and the Indenture, will be legally and validly
     issued, and will be binding obligations of the Corporation, enforceable in
     accordance with their terms, subject, as to enforcement, to bankruptcy,

<PAGE>

COMSAT Corporation
July 7, 1995
Page 2


     insolvency, fraudulent transfer, reorganization, moratorium, and similar
     laws of general applicability relating to or affecting creditors' rights
     and to general equity principles and considerations of public policy.

          2.   When (i) the Registration Statement shall have become effective
     under the Act, (ii) the Guarantee, substantially in the form of Exhibit
     4(h) to the Registration Statement, has been duly executed and delivered by
     the Corporation and (iii) Preferred Securities have been duly issued and
     sold and the purchase price therefor has been received by COMSAT Capital,
     the Guarantee will constitute a legal, valid and binding obligation of the
     Corporation, enforceable in accordance with its terms, subject, as to
     enforcement, to bankruptcy, insolvency, fraudulent transfer,
     reorganization, moratorium, and similar laws of general applicability
     relating to or affecting creditors' rights and to general equity principles
     and considerations of public policy.

I hereby consent to the reference made to me under the caption "Validity of
Securities" in the preliminary Prospectus forming a part of the Registration
Statement and to the filing of this consent as an exhibit to the Registration
Statement.  In giving the foregoing consent, I do not thereby admit that I come
within the category of persons whose consent is required under Section 7 of the
Act or the rules and regulations of the Securities and Exchange Commission
thereunder.

Very truly yours,


/s/ Warren Y. Zeger

Warren Y. Zeger
Vice President, General Counsel
  and Secretary




<PAGE>

                                                                    Exhibit 5(b)


                                CROWELL & MORING
                         1001 PENNSYLVANIA AVENUE, N.W.
                             WASHINGTON, D.C. 20004

                                  July 7, 1995


COMSAT Capital I, L.P.
c/o COMSAT Corporation
6560 Rock Spring Drive
Bethesda, Maryland 20817

               Re:  COMSAT Capital I, L.P.
                    ----------------------

Ladies and Gentlemen:

     We have acted as special counsel for COMSAT Corporation, a District of
Columbia corporation ("COMSAT"), and COMSAT Capital I, L.P., a Delaware limited
partnership (the "Partnership"), in connection with the matters set forth
herein.  At your request, this opinion is being furnished to you.

     For purposes of giving the opinions hereinafter set forth, our examination
of documents has been limited to the examination of executed or conformed
counterparts, or copies otherwise proved to our satisfaction, of the following:

     (a)  The Certificate of Limited Partnership of the Partnership dated as of
May 22, 1995 (the "Certificate"), as filed in the office of the Secretary of
State of the State of Delaware (the "Secretary of State") on May 22, 1995;

     (b)  The Agreement of Limited Partnership of the Partnership, dated as of
May 22, 1995;

     (c)  Amendment No. 1 to the registration statement (the "Registration
Statement") on Form S-3, including a preliminary prospectus (the "Prospectus")
as filed by COMSAT and the Partnership with the Securities and Exchange
Commission on July 7, 1995;

     (d)  A form of Amended and Restated Agreement of Limited Partnership of the
Partnership, attached as Exhibit 4(d) to the Registration Statement (the "LP
Agreement"); and

<PAGE>

COMSAT Capital I, L.P.
c/o COMSAT Corporation
July 7, 1995
Page 2


     (e)  A Certificate of Good Standing for the Partnership, dated July 6,
1995, obtained from the Secretary of State.

     Initially capitalized terms used herein and not otherwise defined are used
as defined in the LP Agreement.

     For purposes of this opinion, we have not reviewed any documents other than
the documents listed in paragraphs (a) through (e) above.  In particular, we
have not reviewed any document (other than the documents listed in paragraphs
(a) through (e) above) that is referred to in or incorporated by reference into
the LP Agreement or the Registration Statement.  We have assumed that there
exists no provision in any document that we have not reviewed that is
inconsistent with the opinions stated herein.  We have conducted no independent
factual investigation of our own but rather have relied solely upon the
foregoing documents, the statements and information set forth therein and the
additional matters recited or assumed herein, all of which we have assumed to be
true, complete and accurate in all material respects.

     With respect to all documents examined by us, we have assumed (i) the
authenticity of all documents submitted to us as authentic originals, (ii) the
conformity with the originals of all documents submitted to us as copies or
forms, and (iii) the genuineness of all signatures.

     For purposes of this opinion, we have assumed (i) that at the time of the
issuance of the Preferred Securities, the LP Agreement will constitute the
entire agreement among the parties thereto with respect to the subject matter
thereof, including with respect to the admission of partners to, and the
creation, operation and termination of, the Partnership, and that the LP
Agreement and the Certificate will be in full force and effect and will not have
been amended, (ii) except to the extent provided in paragraph 1 below, the due
organization or due formation, as the case may be, and valid existence in good
standing of each party to the documents examined by us under the laws of the
jurisdiction governing its organization or formation, (iii) the legal capacity
of natural persons who are parties to the documents examined by us, (iv) that
each of the parties to the documents examined by us has the power and authority
to execute and deliver, and to perform its obligations under, such documents,
(v) the due authorization, execution and delivery by all parties thereto of all
documents examined by us, including the LP Agreement, (vi) the receipt by DTC of
one or more LP Certificates evidencing the Preferred Securities, and the payment
for the Preferred Securities acquired by all of the Limited Partners, in

<PAGE>

COMSAT Capital I, L.P.
c/o COMSAT Corporation
July 7, 1995
Page 3


accordance with the LP Agreement, (vii) that the books and records of the
Partnership set forth all information required by the LP Agreement and the Act,
including all information with respect to all Persons to be admitted as Partners
and their contributions to the Partnership, and (viii) that the Preferred
Securities will be issued and sold to the Limited Partners in accordance with
the Registration Statement and the LP Agreement.

     This opinion is limited to the laws of the State of Delaware (excluding the
securities laws of the State of Delaware), and we have not considered and
express no opinion on the laws of any other jurisdiction, including federal laws
and rules and regulations relating thereto.  Our opinions are rendered only with
respect to Delaware laws and rules, regulations and orders thereunder which are
currently in effect.

     Based upon the foregoing, and upon our examination of such questions of law
and statutes of the State of Delaware as we have considered necessary or
appropriate, and subject to the assumptions, qualifications, limitations and
exceptions set forth herein, we are of the opinion that:

     1.   The Partnership has been duly formed and is validly existing in good
standing as a limited partnership under the Act.

     2.   Assuming that the Limited Partners, as limited partners of the
Partnership, do not participate in the control of the business of the
Partnership, upon issuance and payment as contemplated by the LP Agreement, the
Preferred Securities will represent valid and, subject to the qualifications set
forth herein, will be fully paid and nonassessable limited partner interests in
the Partnership, as to which the Limited Partners, as limited partners of the
Partnership, will have no liability in excess of their obligations to make
payments provided for in the LP Agreement and their share of the Partnership's
assets and undistributed profits (subject to the obligation of a Limited Partner
to repay any funds wrongfully distributed to it).

     3.   There are no provisions in the LP Agreement the inclusion of which,
subject to the terms and conditions therein, or, assuming that the Limited
Partners, as limited partners of the Partnership, take no action other than
actions permitted by the LP Agreement, the exercise of which, in accordance with
the terms and conditions therein, would cause the Limited Partners, as limited
partners of the

<PAGE>

COMSAT Capital I, L.P.
c/o COMSAT Corporation
July 7, 1995
Page 4


Partnership, to be deemed to be participating in the control of the business of
the Partnership.

     We consent to the filing of this opinion with the Securities and Exchange
Commission as an exhibit to the Registration Statement and to the use of our
name under the heading "Validity of the Securities" in the Prospectus.  In
giving the foregoing consent, we do not thereby admit that we come within the
category of persons whose consent is required under Section 7 of the Securities
Act of 1933, as amended, or the rules and regulations of the Securities and
Exchange Commission thereunder.  Except as stated above, without our prior
written consent, this opinion may not be furnished or quoted to, or relied upon
by, any other person or entity for any purposes.

                              Very truly yours,


                              /s/  CROWELL & MORING

                              CROWELL & MORING




<PAGE>

                                CROWELL & MORING
                         1001 PENNSYLVANIA AVENUE, N.W.
                          WASHINGTON, D.C.  20004-2595
                                 (202) 624-2500

                                  July 7, 1995




COMSAT Corporation
6560 Rock Spring Drive
Bethesda, MD 20817

COMSAT Capital I, L.P.
c/o COMSAT Corporation
6560 Rock Spring Drive
Bethesda, MD 20817

Ladies and Gentlemen:

     We have acted as special tax counsel to each of you and participated in the
preparation of the Registration Statement on Form S-3 (Commission File No. 33-
59841) (such Registration Statement, as amended at the effective date thereof,
being referred to herein as the "Registration Statement") filed with the
Securities and Exchange Commission under the Securities Act of 1933, as amended
(the "Securities Act"), with respect to the registration of __% Cumulative
Monthly Income Preferred Securities of COMSAT Capital I, L.P., together with the
Prospectus relating thereto and included as part of the Registration Statement.

     Based on our examination of such documents and questions of law as we have
deemed necessary or appropriate, we confirm to you our opinion, as stated in the
second paragraph under the caption "Risk Factors--Tax Event or Investment
Company Event Redemption or Distribution" and under the caption "United States
Taxation" in the Prospectus included as part of the Registration Statement.  The
other statements under the caption "United States Taxation" in the Prospectus
are also, in our opinion, accurate in all material respects insofar as they are,
or refer to, statements of United States law or legal conclusions.

     We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the references to our firm under the headings
"United States Taxation" and "Validity of the Securities" in the Prospectus
included as part of the Registration Statement.  By giving such consent, we do
not admit that we are within


<PAGE>

COMSAT Corporation
COMSAT Capital I, L.P.
July 7, 1995
Page 2


the category of persons whose consent is required under Section 7 of the
Securities Act or the rules and regulations of the Securities and Exchange
Commission thereunder.

                                   Very truly yours,

                                   /s/ CROWELL & MORING

                                   CROWELL & MORING



<PAGE>
                                                                      EXHIBIT 12

                      COMSAT CORPORATION AND SUBSIDIARIES
               COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

                         (Dollar amounts in thousands)

   
<TABLE>
<CAPTION>
                                                  QUARTER ENDED
                                                    MARCH 31,                           YEAR ENDED DECEMBER 31,
                                               --------------------  -------------------------------------------------------------
                                                 1995       1994        1994         1993         1992         1991        1990
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
<S>                                            <C>        <C>        <C>          <C>          <C>          <C>          <C>
Income (loss) from continuing operations
 before income taxes, extraordinary items and
 cumulative effect of accounting changes.....  $  22,911  $  31,959  $   127,321  $   137,661  $    83,263  $   118,566  $  (5,767)
Add (subtract):
  Interest on indebtedness (net of amount
   capitalized)..............................      8,875      6,152       25,278       23,684       26,311       19,931      7,339
  Other interest expense (1).................     --         --          --           --             1,263        3,195      3,074
  Portion of rents representative of the
   interest factor...........................        894      1,141        4,191        4,007        2,124        1,837      1,351
  Undistributed income of less-than-fifty
   percent owned investments.................       (322)      (535)      (1,340)      (1,541)         (64)         (35)    --
  Equity losses of less-than-fifty percent
   owned investments.........................        525         61          561          154          136          182     --
  Minority interest share of losses of
   majority-owned subsidiaries...............       (716)    --             (605)     --            (1,160)      (3,577)    (3,721)
  Amortization and write off of previously
   capitalized interest......................      6,011      5,985       24,134       21,132       20,035       20,821     16,594
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
Income as adjusted...........................  $  38,178  $  44,763  $   179,540  $   185,097  $   131,908  $   160,920  $  18,870
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
Fixed charges:
  Interest on indebtedness...................  $  14,751  $  11,892  $    48,940  $    45,881  $    46,792  $    47,328  $  38,171
  Other interest expense (1).................     --         --          --           --             1,263        3,195      3,074
  Portion of rents representative of the
   interest factor...........................        894      1,141        4,191        4,007        2,124        1,837      1,351
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
Total fixed charges..........................  $  15,645  $  13,033  $    53,131  $    49,888  $    50,179  $    52,360  $  42,596
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
                                               ---------  ---------  -----------  -----------  -----------  -----------  ---------
RATIO OF EARNINGS TO FIXED CHARGES (2).......        2.4        3.4          3.4          3.7          2.6          3.1     --  (3)
<FN>
- ------------------

(1)  Interest  expense of  majority-owned subsidiary  not consolidated  in 1990,
     1991 and the first half of 1992.

(2)  A portion  of  the securities  being  registered  will be  used  to  reduce
     outstanding  commercial  paper  of  COMSAT.  See  "Use  of  Proceeds". This
     refinancing would reduce the  ratios of earnings to  fixed charges for  the
     year  ended December 31, 1994 and for the quarter ended March 31, 1995 on a
     pro forma basis by less than ten percent.

(3)  1990 earnings were  inadequate to cover  fixed charges, as  such terms  are
     defined  in Item  503(d) of Regulation  S-K, with a  coverage deficiency of
     $23,726,000. However,  1990  earnings include  a  $97,576,000  nonrecurring
     charge  related to  the restructuring  of the  video entertainment business
     unit.
</TABLE>
    

<PAGE>
                                                                   EXHIBIT 23(A)

                         INDEPENDENT AUDITORS' CONSENT

   
    We  consent to  the incorporation  by reference in  this Amendment  No. 1 to
Registration Statement No.  33-59841 of COMSAT  Corporation on Form  S-3 of  our
report  dated February 10, 1995,  appearing in the Annual  Report on Form 10-K/A
(Amendment No. 1) of COMSAT Corporation for the year ended December 31, 1994 and
to the references  to us under  the headings "Summary  Financial Information  of
COMSAT"  and "Experts" in the Prospectuses,  which are part of this Registration
Statement.
    

Deloitte & Touche LLP

/s/ Deloitte & Touche LLP

Washington, D.C.
   
July 7, 1995
    

<PAGE>
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM T-1

                            STATEMENT OF ELIGIBILITY
                      UNDER THE TRUST INDENTURE ACT OF 1939
                  OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

                CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY
                OF A TRUSTEE PURSUANT TO SECTION 305(b)(2)  / /

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

                       THE FIRST NATIONAL BANK OF CHICAGO
               (Exact name of trustee as specified in its charter)

    A National Banking Association                 36-0899825
                                                  (I.R.S. employer
                                            identification number)

One First National Plaza, Chicago, Illinois                60670-0126
     (Address of principal executive offices)              (Zip Code)

                       The First National Bank of Chicago
                      One First National Plaza, Suite 0286
                         Chicago, Illinois   60670-0286
             Attn:  Lynn A. Goldstein, Law Department (312) 732-6919
            (Name, address and telephone number of agent for service)


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

                               COMSAT Corporation

     District of Columbia                                   52-0781863
(State or other jurisdiction of                             (I.R.S. employer
 incorporation or organization)                       identification number)


    6560  Rock Spring Drive
     Bethesda, Maryland                                         20817
(Address of principal executive offices)                     (Zip Code)


                               Debt Securities
                          (TITLE OF INDENTURE SECURITIES)

<PAGE>

ITEM 1.   GENERAL INFORMATION.  FURNISH THE FOLLOWING
          INFORMATION AS TO THE TRUSTEE:

          (a)    NAME AND ADDRESS OF EACH EXAMINING OR
          SUPERVISING AUTHORITY TO WHICH IT IS SUBJECT.

          Comptroller of Currency, Washington, D.C.,
          Federal Deposit Insurance Corporation,
          Washington, D.C., The Board of Governors of
          the Federal Reserve System, Washington D.C.

          (b)    WHETHER IT IS AUTHORIZED TO EXERCISE
          CORPORATE TRUST POWERS.

          The trustee is authorized to exercise corporate
          trust powers.

ITEM 2.   AFFILIATIONS WITH THE OBLIGOR.  IF THE OBLIGOR
          IS AN AFFILIATE OF THE TRUSTEE, DESCRIBE EACH
          SUCH AFFILIATION.

          No such affiliation exists with the trustee.


ITEM 16.  LIST OF EXHIBITS.   LIST BELOW ALL EXHIBITS FILED AS A
          PART OF THIS STATEMENT OF ELIGIBILITY.

          1.   A copy of the articles of association of the
               trustee now in effect.*

          2.   A copy of the certificates of authority of the
               trustee to commence business.*

          3.   A copy of the authorization of the trustee to
               exercise corporate trust powers.*

          4.   A copy of the existing by-laws of the trustee.*

          5.   Not Applicable.

          6.   The consent of the trustee required by
               Section 321(b) of the Act.


                                        2

<PAGE>

          7.   A copy of the latest report of condition of the
               trustee published pursuant to law or the
               requirements of its supervising or examining
               authority.

          8.   Not Applicable.

          9.   Not Applicable.


     Pursuant to the requirements of the Trust Indenture Act of 1939, as
     amended, the trustee, The First National Bank of Chicago, a national
     banking association organized and existing under the laws of the
     United States of America, has duly caused this Statement of
     Eligibility to be signed on its behalf by the undersigned, thereunto
     duly authorized, all in the City of Chicago and State of Illinois, on
     the 21st day of June, 1995.


               THE FIRST NATIONAL BANK OF CHICAGO,
               TRUSTEE,

               BY        /s/ John R. Prendiville
                         John R. Prendiville
                         Vice President


     *Exhibits 1, 2, 3 and 4 are herein incorporated by reference to
     Exhibits bearing identical numbers in Item 12 of the Form T-1 of The
     First National  Bank of Chicago, filed as Exhibit 26 to the
     Registration Statement on  Form S-3 of The CIT Group Holdings, Inc.
     filed with the Securities and Exchange Commission on February 16, 1993
     (Registration No. 33-58418).


                                        3

<PAGE>

                                    EXHIBIT 6



                       THE CONSENT OF THE TRUSTEE REQUIRED
                          BY SECTION 321(b) OF THE ACT


                                                       June 21, 1995




Securities and Exchange Commission
Washington, D.C.  20549

Gentlemen:

In connection with the qualification of an indenture between COMSAT Corporation
and The First National Bank of Chicago, the undersigned, in accordance with
Section 321(b) of the Trust Indenture Act of 1939, as amended, hereby consents
that the reports of examinations of the undersigned, made by Federal or State
authorities authorized to make such examinations, may be furnished by such
authorities to the Securities and Exchange Commission upon its request therefor.


                                   Very truly yours,

                                   THE FIRST NATIONAL BANK OF CHICAGO

                                   BY:  /s/ John R. Prendiville
                                        John R. Prendiville
                                        Vice President


                                        4

<PAGE>

                                    EXHIBIT 7



     A  copy of the latest report of conditions of the trustee published
     pursuant to law or the requirements of its supervising or examining
     authority.



                                        5

<PAGE>

Legal Title of Bank:   The First National Bank of Chicago     Call Date: 3/31/95
Address:               One First National Plaza, Suite 0460   ST-BK:   17-1630
City, State Zip:       Chicago, IL  60670-0460                         FFIEC 031
FDIC Certificate No.:  0/3/6/1/8                                       Page RC-1

CONSOLIDATED REPORT OF CONDITION FOR INSURED COMMERCIAL
AND STATE-CHARTERED SAVINGS BANKS FOR MARCH 31, 1995

All schedules are to be reported in thousands of dollars.  Unless otherwise
indicated, report the amount outstanding of the last business day of the
quarter.

SCHEDULE RC--BALANCE SHEET
<TABLE>
<CAPTION>

                                                                        DOLLAR AMOUNTS IN                 C400           LESS THAN -
                                                                                                       ------------      -----------
                                                                            THOUSANDS          RCFD    BIL MIL THOU
                                                                        -----------------      ----    ------------

<S>                                                                     <C>                    <C>     <C>                  <C>
ASSETS
1.   Cash and balances due from depository institutions
     (from Schedule RC-A):
     a. Noninterest-bearing balances and currency and coin(1). .                               0081       2,948,128            1.a.
     b. Interest-bearing balances(2) . . . . . . . . . . . . . .                               0071       8,482,108            1.b.
2.   Securities
     a. Held-to-maturity securities(from Schedule RC-B, column A)                              1754         167,911            2.a.
     b. Available-for-sale securities (from Schedule RC-B, column D)                           1773         540,011            2.b.
3.   Federal funds sold and securities purchased under agreements
     to resell in domestic offices of the bank and its Edge and
     Agreement subsidiaries, and in IBFs:. . . . . . . . . . . .
     a. Federal Funds sold . . . . . . . . . . . . . . . . . . .                               0276       2,508,883            3.a.
     b. Securities purchased under agreements to resell. . . . .                               0277       1,422,695            3.b.
4.   Loans and lease financing receivables:
     a. Loans and leases, net of unearned income (from Schedule
     RC-C) . . . . . . . . . . . . . . . . . . . . . . . . . . .        RCFD 2122 16,238,310                                   4.a.
     b. LESS: Allowance for loan and lease losses. . . . . . . .        RCFD 3123    358,207                                   4.b.
     c. LESS: Allocated transfer risk reserve. . . . . . . . . .        RCFD 3128          0                                   4.c.
     d. Loans and leases, net of unearned income, allowance, and
        reserve (item 4.a minus 4.b and 4.c) . . . . . . . . . .                               2125      15,880,103            4.d.
5.   Assets held in trading accounts . . . . . . . . . . . . . .                               3545      13,257,798            5.
6.   Premises and fixed assets (including capitalized leases). .                               2145         516,827            6.
7.   Other real estate owned (from Schedule RC-M). . . . . . . .                               2150          13,166            7.
8.   Investments in unconsolidated subsidiaries and associated
     companies (from Schedule RC-M). . . . . . . . . . . . . . .                               2130          10,363            8.
9.   Customers' liability to this bank on acceptances outstanding                              2155         463,961            9.
10.  Intangible assets (from Schedule RC-M). . . . . . . . . . .                               2143         119,715           10.
11.  Other assets (from Schedule RC-F) . . . . . . . . . . . . .                               2160       1,346,941           11.
12.  Total assets (sum of items 1 through 11). . . . . . . . . .                               2170      47,678,610           12.

- -----------------
<FN>
(1)  Includes cash items in process of collection and unposted debits.
(2)  Includes time certificates of deposit not held in trading accounts.
</TABLE>


                                        6

<PAGE>

Legal Title of Bank:   The First National Bank of Chicago     Call Date: 3/31/95
Address:               One First National Plaza, Suite 0460   ST-BK:   17-1630
City, State Zip:       Chicago, IL  60670-0460                         FFIEC 031
FDIC Certificate No.:  0/3/6/1/8                                       Page RC-2

<TABLE>
<CAPTION>
SCHEDULE RC-CONTINUED
                                                                         DOLLAR AMOUNTS IN
                                                                            THOUSANDS                      BIL MIL THOU
                                                                         --------------                    ------------
<S>                                                                     <C>                    <C>         <C>              <C>
LIABILITIES
13.  Deposits:
     a. In domestic offices (sum of totals of columns A and C
        from Schedule RC-E, part 1). . . . . . . . . . . . . . .                               RCON 2200   14,675,401       13.a.
        (1) Noninterest-bearing(1) . . . . . . . . . . . . . . .        RCON 6631  5,498,690                                13.a.(1)
        (2) Interest-bearing . . . . . . . . . . . . . . . . . .        RCON 6636  9,176,711                                13.a.(2)
     b. In foreign offices, Edge and Agreement subsidiaries, and
        IBFs (from Schedule RC-E, part II) . . . . . . . . . . .                                    RCFN 2200     11,809,645  13.b.
        (1) Noninterest bearing. . . . . . . . . . . . . . . . .        RCFN 6631    304,669                                13.b.(1)
        (2) Interest-bearing . . . . . . . . . . . . . . . . . .        RCFN 6636 11,504,976                                13.b.(2)
14.  Federal funds purchased and securities sold under agreements
     to repurchase in domestic offices of the bank and of
     its Edge and Agreement subsidiaries, and in IBFs:
     a. Federal funds purchased. . . . . . . . . . . . . . . . .                               RCFD 0278    2,072,830       14.a.
     b. Securities sold under agreements to repurchase . . . . .                               RCFD 0279    1,484,164       14.b.
15.  a. Demand notes issued to the U.S. Treasury . . . . . . . .                               RCON 2840     103,138        15.a.
     b. Trading Liabilities. . . . . . . . . . . . . . . . . . .                               RCFD 3548    9,101,186       15.b.
16.  Other borrowed money:
     a. With original maturity of one year or less . . . . . . .                               RCFD 2332    2,307,860       16.a.
     b. With original  maturity of more than one year. . . . . .                               RCFD 2333      506,476       16.b.
17.  Mortgage indebtedness and obligations under capitalized
     leases. . . . . . . . . . . . . . . . . . . . . . . . . . .                               RCFD 2910      278,108       17.
18.  Bank's liability on acceptance executed and outstanding . .                               RCFD 2920      463,961       18.
19.  Subordinated notes and debentures . . . . . . . . . . . . .                               RCFD 3200    1,225,000       19.
20.  Other liabilities (from Schedule RC-G). . . . . . . . . . .                               RCFD 2930      699,375       20.
21.  Total liabilities (sum of items 13 through 20). . . . . . .                               RCFD 2948   44,727,144       21.
22.  Limited-Life preferred stock and related surplus. . . . . .                               RCFD 3282        0           22.
EQUITY CAPITAL
23.  Perpetual preferred stock and related surplus . . . . . . .                               RCFD 3838        0           23.
24.  Common stock. . . . . . . . . . . . . . . . . . . . . . . .                               RCFD 3230      200,858       24.
25.  Surplus (exclude all surplus related to preferred stock). .                               RCFD 3839    2,304,657       25.
26.  a. Undivided profits and capital reserves . . . . . . . . .                               RCFD 3632      447,916       26.a.
     b. Net unrealized holding gains (losses) on available-for-
        sale securities. . . . . . . . . . . . . . . . . . . . .                               RCFD 8434      [ 2,165)      26.b.
27.  Cumulative foreign currency translation adjustments . . . .                               RCFD 3284          200       27.
28.  Total equity capital (sum of items 23 through 27) . . . . .                               RCFD 3210    2,951,466       28.
29.  Total liabilities, limited-life preferred stock, and equity
     capital (sum of items 21, 22, and 28) . . . . . . . . . . .                               RCFD 3300   47,678,610       29.

Memorandum
To be reported only with the March Report of Condition.
1.   Indicate in the box at the right the number of the statement below that
     best describes the most comprehensive level of auditing work performed for
     the bank by independent external                                                                      Number
                                                                                                  -------------------
                                                                                                    RCDF 6724   N/A
     auditors as of any date during 1993 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-------------------          M.1.
<FN>
1 =  Independent audit of the bank conducted in accordance with generally
     accepted auditing standards by a certified public accounting firm which
     submits a report on the bank
2 =  Independent audit of the bank's parent holding company conducted in
     accordance with generally accepted auditing standards by a certified public
     accounting firm which submits a report on the consolidated holding company
     (but not on the bank separately)
3 =  Directors' examination of the bank conducted in accordance with generally
     accepted auditing standards by a certified public accounting firm (may be
     required by state chartering authority)
4 =  Directors' examination of the bank performed by other external auditors
     (mat be required by state chartering authority)
5 =  Review of the bank's financial statements by external auditors
6 =  Compilation of the bank's financial statements by external auditors
7 =  Other audit procedres (excluding tax preparation work)
8 =  No external audit work

- ---------------
(1) Includes total demand deposits and noninterest-bearing time and savings
    deposits.
</TABLE>

                                        7


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