GEOTEK COMMUNICATIONS INC
SC 13D/A, 1997-04-30
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 11)*

                           GEOTEK COMMUNICATIONS, INC.
                     --------------------------------------
                                (Name of Issuer)

                          Common Stock, $.01 Par Value
                      ------------------------------------
                         (Title of Class of Securities)

                                    373654102
                              --------------------
                                 (CUSIP Number)

                              Stephen M. Vine, Esq.
                    Akin, Gump, Strauss, Hauer & Feld, L.L.P.
                               590 Madison Avenue
                            New York, New York 10022
                                 (212) 872-1000
                    ----------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                 April 22, 1997
                     --------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [_].


Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule 13d- 1(a) for other  parties to whom copies are to be
sent.














                         Continued on following page(s)
                               Page 1 of 45 Pages
                             Exhibit Index: Page 19




<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 2 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               S-C RIG INVESTMENTS-III, L.P.

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               WC

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         11,726,369
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           11,726,369
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    11,726,369/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    16.46%/1/

14      Type of Reporting Person*

        PN
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 3 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               S-C RIG CO.

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               AF

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         11,726,369
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           11,726,369
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    11,726,369/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    16.46%/1/

14      Type of Reporting Person*

        CO
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D

CUSIP No. 373654102                                           Page 4 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               WINSTON PARTNERS, L.P.

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         185,978
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           185,978
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    185,978/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                             .31%/1/

14      Type of Reporting Person*

               PN
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D

CUSIP No. 373654102                                           Page 5 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               CHATTERJEE FUND MANAGEMENT, L.P.

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         185,978
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           185,978
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    185,978/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                             .31%/1/

14      Type of Reporting Person*

               PN
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 6 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               WINSTON PARTNERS II LDC

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Cayman Islands

                      7      Sole Voting Power
  Number of                         233,290
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           233,290
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    233,290/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    .39%/1/

14      Type of Reporting Person*

        OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 7 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               WINSTON PARTNERS II LLC

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         116,520
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           116,520
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    116,520/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    .19%/1/

14      Type of Reporting Person*

        OO; IV

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 8 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               CHATTERJEE ADVISORS LLC

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         349,810
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           349,810
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    349,810/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    .58%/1/

14      Type of Reporting Person*

        OO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                           Page 9 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               CHATTERJEE MANAGEMENT COMPANY

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               Not applicable

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [_]

6       Citizenship or Place of Organization

               Delaware

                      7      Sole Voting Power
  Number of                         349,810
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           349,810
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    349,810/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [X]

13      Percent of Class Represented By Amount in Row (11)

                                    .58%/1/

14      Type of Reporting Person*

        CO; IA

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>



                                  SCHEDULE 13D
CUSIP No. 373654102                                          Page 10 of 45 Pages

1       Name of Reporting Person
        S.S. or I.R.S. Identification No. of Above Person

               PURNENDU CHATTERJEE

2       Check the Appropriate Box If a Member of a Group*
                                            a.  [_]
                                            b.  [X]

3       SEC Use Only

4       Source of Funds*

               AF

5       Check Box If Disclosure  of Legal  Proceedings  Is Required  Pursuant to
        Items 2(d) or 2(e) [X]

6       Citizenship or Place of Organization

               United States

                      7      Sole Voting Power  Number of
  Number of                         12,492,157
   Shares
Beneficially          8       Shared Voting Power
  Owned By                          0
    Each
  Reporting           9      Sole Dispositive Power
   Person                           12,492,157
    With
                      10     Shared Dispositive Power
                                    0

11      Aggregate Amount Beneficially Owned by Each Reporting Person

                                    12,492,157/1/

12      Check Box If the Aggregate  Amount in Row (11) Excludes  Certain Shares*
        [_]

13      Percent of Class Represented By Amount in Row (11)

                                     17.36%/1/

14      Type of Reporting Person*

        IA; IN

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

- -------------
/1/     See Item 5. This  number  does not  include  certain  securities  of the
        Issuer of which the Reporting Person may be deemed the beneficial owner.


<PAGE>


                                                             Page 11 of 45 Pages


          This  Amendment No. 11 to Schedule 13D relates to the shares of common
stock,  $0.01 par value (the  "Shares"),  of Geotek  Communications,  Inc.  (the
"Issuer") and all  subsequent  amendments  thereto  (collectively,  the "Initial
Statement").  This  Amendment No. 11 is being filed by the Reporting  Persons to
report that the Issuer and S-C Rig  Investments-III,  L.P.  ("S-C Rig III") have
effected  Amendment  No. 1 to the 1996 Senior Loan  Agreement (as defined in the
Initial  Statement) and that in connection  therewith the Issuer has amended the
terms of the April  Warrant  (as defined in the  Initial  Statement)  previously
issued to S-C Rig III.  Capitalized  terms used  herein but not  defined  herein
shall have the meanings ascribed to them in the Initial  Statement.  The Initial
Statement is supplementally amended as follows.

Item 3.        Source and Amount of Funds or Other Consideration.

          As disclosed in Amendment No. 10 to the initial  statement on Schedule
13D filed by the Reporting Persons, the number of Shares into which the Series P
Preferred  Stock is convertible  depends,  in part, on the "Average Stock Price"
(as such term is defined in Amendment No. 10) of the Shares. For the purposes of
this Schedule 13D, in  determining  the amount of Shares into which the Series P
Stock are  convertible,  an assumption will be made that the Average Stock Price
is $4.00 per Share. This price  approximates the recent trading price of Shares.
Based on this price,  which  fluctuates on a daily basis and is only an estimate
for the  purposes  of this  filing,  each  share  of  Series  P Stock  would  be
convertible into approximately 12,500 Shares.

Item 5.        Interest in Securities of the Issuer.

          (a) (i) Excluding the Series P Stock,  the aggregate  number of Shares
of which each of S-C Rig III and the General  Partner may be deemed a beneficial
owner is  11,726,369  (approximately  16.46% of the total number of Shares which
would be  outstanding  assuming the exercise or conversion by S-C Rig III of all
of the  convertible  securities  held for its  account,  except for the Series P
Stock). This number consists of (i) 4,444,450 Shares issuable upon conversion of
the Series H shares,  (ii) 851,064 Shares issuable upon conversion of the Series
I Shares,  (iii)  621,000  Shares  issuable  upon the  exercise  of the  621,000
Warrants, (iv) 4,210,526 Shares issuable upon exercise of the April Warrant, (v)
340,909  Shares  issuable  upon  conversion  of the Series N Shares held for the
account of S-C Rig III, (vi) 112,500  Shares  issuable upon exercise of the June
Warrants held for the account of S-C Rig III, (vii) 510,000 Shares issuable upon
exercise of the 510,000 Series P Initial Warrants and (viii) 635,920 Shares held
for the account of S-C Rig III.

          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion of all of the Series P Stock held for the account of S-C Rig III, the
aggregate  number of Shares of which each of S-C Rig III and the General Partner
may be deemed a  beneficial  owner is  15,476,369  (approximately  20.64% of the
total  number of Shares  which would be  outstanding  assuming  the  exercise or
conversion  by S-C Rig III of all of the  convertible  securities  held  for its
account).  This number  assumes the  conversion  of 300 shares of Series P Stock
into 3,750,000 Shares.

          (ii) Excluding the Series P Stock,  the aggregate  number of Shares of
which each of Winston L.P.  and CFM may be deemed a beneficial  owner is 185,978
(approximately  0.31% of the total number of Shares  which would be  outstanding
assuming the exercise or conversion of all  convertible  securities held for the
account of Winston L.P., except for the Series P Stock).  This number represents
(i) the 170,000  Shares  issuable  upon the  exercise  of the  170,000  Series P
Initial  Warrants  held for the account of Winston L.P.  and (ii) 15,978  Shares
held for the account of Winston L.P.



<PAGE>


                                                             Page 12 of 45 Pages


          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion  of all of the Series P Stock held for the  account of Winston  L.P.,
the  aggregate  number of Shares of which  each of Winston  L.P.  and CFM may be
deemed a beneficial owner is 1,435,978  (approximately 2.33% of the total number
of Shares which would be  outstanding  assuming the  exercise or  conversion  by
Winston L.P. of all of the convertible  securities  held for its account).  This
number  assumes the  conversion  of 100 shares of Series P Stock into  1,250,000
Shares.

          (iii) Excluding the Series P Stock,  the aggregate number of Shares of
which  Winston LDC may be deemed a  beneficial  owner is 233,290  (approximately
0.39% of the total  number of Shares  which would be  outstanding  assuming  the
exercise or conversion  of all  convertible  securities  held for the account of
Winston LDC, except for the Series P Stock).  This number consists of (i) 75,818
Shares  issuable  upon  conversion  of the Series N Shares held for its account,
(ii) 25,020  Shares  issuable  upon  exercise of the June  Warrants held for its
account, (iii) 113,333 Shares issuable upon the exercise of the 113,333 Series P
Initial Warrants, and (iv) 19,119 Shares held for the account of Winston LDC.

          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion of all of the Series P Stock held for the account of Winston LDC, the
aggregate number of Shares of which Winston LDC may be deemed a beneficial owner
is 1,066,623  (approximately  1.74% of the total number of Shares which would be
outstanding  assuming  the exercise or  conversion  by Winston LDC of all of the
convertible securities held for its account). This number assumes the conversion
of 66 2/3 shares of Series P Stock into 833,333 Shares.

          (iv) Excluding the Series P Stock,  the aggregate  number of Shares of
which  Winston LLC may be deemed a  beneficial  owner is 116,520  (approximately
0.19% of the total  number of Shares  which would be  outstanding  assuming  the
exercise or conversion  of all  convertible  securities  held for the account of
Winston LLC, except for the Series P Stock).  This number consists of (i) 37,818
Shares  issuable  upon  conversion  of the Series N Shares held for its account,
(ii) 12,480  Shares  issuable  upon  exercise of the June  Warrants held for its
account,  (iii) 56,667 Shares  issuable upon the exercise of the 56,667 Series P
Initial Warrants, and (iv) 9,555 Shares held for the account of Winston LLC.

          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion of all of the Series P Stock held for the account of Winston LLC, the
aggregate  number of Shares of which may be deemed a beneficial owner is 533,187
(approximately  0.88% of the total number of Shares  which would be  outstanding
assuming the  exercise or  conversion  by Winston LLC of all of the  convertible
securities  held for its account).  This number assumes the conversion of 33 1/3
shares of Series P Stock into 416,667 Shares.

          (v)  Excluding the Series P Stock,  the aggregate  number of Shares of
which each of  Chatterjee  Advisors and  Chatterjee  Management  may be deemed a
beneficial owner is 349,810  (approximately  0.58% of the total number of Shares
which  would  be  outstanding   assuming  the  exercise  or  conversion  of  all
convertible  securities  held for the  accounts of Winston LDC and Winston  LLC,
except for the Series P Stock). This number consists of (i) 233,290 Shares which
Winston LDC may be deemed to own  beneficially  and (ii)  116,520  Shares  which
Winston LLC may be deemed to own beneficially.



<PAGE>


                                                             Page 13 of 45 Pages


          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion of all of the Series P Stock held for the accounts of Winston LDC and
Winston LLC, the aggregate number of Shares of which each of Chatterjee Advisors
and  Chatterjee  Management  may be  deemed  a  beneficial  owner  is  1,599,810
(approximately  2.59% of the total number of Shares  which would be  outstanding
assuming the exercise or conversion by Winston LDC and Winston LLC of all of the
convertible securities held for its account). This number assumes the conversion
of 100 shares of Series P Stock held for the accounts of Winston LLC and Winston
LDC into 1,250,000 Shares.

          (vi) Excluding the Series P Stock,  the aggregate  number of Shares of
which  Dr.   Chatterjee   may  be  deemed  a  beneficial   owner  is  12,492,157
(approximately  17.36% of the total number of Shares which would be  outstanding
assuming the exercise or conversion of all  convertible  securities of which Dr.
Chatterjee may be deemed the beneficial  owner,  except for the Series P Stock).
This number consists of (i) 11,726,369  Shares which S-C Rig III and the General
Partner may be deemed to own  beneficially,  (ii) 30,000  Shares  issuable  upon
exercise  of  the  options  held  directly  for  the  personal  account  of  Dr.
Chatterjee,  (iii) 200,000 Shares  issuable upon exercise of the options held by
XTEC, (iv) 349,810 Shares which  Chatterjee  Advisors and Chatterjee  Management
may be deemed to own  beneficially,  and (v) the 170,000 Shares of which Winston
L.P. and CFM may be deemed to own beneficially.

          Based  on the  assumptions  set  forth in Item 3 with  respect  to the
Series P Stock,  which  are  incorporated  herein  by  reference,  assuming  the
conversion  of all of the Series P Stock held for the  accounts  of S-C Rig III,
Winston  L.P.,  Winston LDC and Winston LLC, the  aggregate  number of Shares of
which  Dr.   Chatterjee   may  be  deemed  a  beneficial   owner  is  18,742,157
(approximately  23.97% of the total number of Shares which would be  outstanding
assuming the  exercise or  conversion  by S-C Rig III of all of the  convertible
securities  held for its  account).  This number  assumes the  conversion of 500
shares of Series P Stock held for the  accounts  of S-C Rig III,  Winston  L.P.,
Winston LDC and Winston LLC into 6,250,000 Shares.

          (b) (i) Each of S-C Rig III and the General  Partner has sole power to
vote and dispose of the Shares held, or issuable upon the conversion or exercise
of the all of the convertible  securities reported herein as being held, for the
account of S-C Rig III.

          (ii) Each of  Winston  L.P.  and CFM has the sole  power to direct the
voting and  disposition  of the Shares held, or issuable upon the  conversion or
exercise of the all of the convertible securities reported herein as being held,
for the account of Winston L.P.

          (iii) Winston LDC has sole power to direct the voting and  disposition
of the Shares held,  or issuable  upon the  conversion or exercise of the all of
the convertible securities reported herein as being held, for its account.

          (iv)  Winston LLC has sole power to direct the voting and  disposition
of the Shares held,  or issuable  upon the  conversion or exercise of the all of
the convertible securities reported herein as being held, for its account.

          (v) Each of Chatterjee Advisors and Chatterjee Management has the sole
power to direct the voting and  disposition of the Shares held, or issuable upon
the  conversion or exercise of the all of the  convertible  securities  reported
herein as being held, for the accounts Winston LDC and Winston LLC.


<PAGE>


                                                             Page 14 of 45 Pages



          (vi) Dr. Chatterjee may be deemed to have the sole power to direct the
voting and  disposition  of the Shares held, or issuable upon the  conversion or
exercise of the all of the convertible securities reported herein as being held,
for the accounts of S-C Rig III, Winston L.P., Winston LDC and Winston LLC.

               Dr.  Chatterjee also may be deemed to have the sole power to vote
and dispose of the 230,000  Shares  issuable upon exercise of the 30,000 options
held directly by him and the 200,000 options held by XTEC.

          (c)  Except  as  disclosed  in  Item 3 and  Item 6  hereof,  which  is
incorporated  by  reference  in this Item 5, and the  transactions  set forth on
Annex  A,  which  were  effected  in  routine  brokerage   transactions  in  the
over-the-counter  market, there have been no transactions  effected with respect
to the Shares  since March 1, 1997 (60 days prior to the date  hereof) by any of
the Reporting Persons.

          (d) (i) The partners of S-C Rig III, including Tivadar Charitable Lead
Trust,  created  under  agreement  dated 9/30/82 by Mr. George Soros as grantor,
have the right to participate in the receipt of dividends from, or proceeds from
the sale of, the  securities  described  herein as being held for the account of
S-C Rig III in accordance with their partnership interests in S-C Rig III.

             (ii) The partners of Winston L.P. have the right to  participate in
the receipt of  dividends  from,  or proceeds  from the sale of, the  securities
described  herein as being held for the account of Winston  L.P.  in  accordance
with their partnership interests in Winston L.P.

             (iii) The  shareholders of each of Winston LDC,  including  Winston
Partners II Offshore  Ltd.,  a British  Virgin  Islands  international  business
corporation,  and  Winston LLC have the right to  participate  in the receipt of
dividends from, or proceeds from the sale of, the securities described herein as
being held for the account each of Winston LDC and Winston LLC, respectively, in
accordance with their ownership interests in Winston LDC and Winston LLC.

             (iv) Dr.  Chatterjee has the sole right to receive  dividends from,
or proceeds from the sale of, the 30,000 options  described herein as being held
directly for his personal account.

             (v) The shareholders of XTEC,  including Dr.  Chatterjee,  have the
right to receive  dividends  from,  or  proceeds  from the sale of, the  200,000
options  described  herein as being held for the account XTEC in accordance with
their ownership interests in XTEC.

          (e) Not applicable.




<PAGE>


                                                             Page 15 of 45 Pages



Item 6.        Contracts,  Arrangements,  Understandings  in  Relationship  with
               Respect to Securities of the Issuer.

               On April 22, 1997, the Issuer and S-C Rig III effected  Amendment
No. 1 to the 1996 Senior Loan  Agreement,  which is attached hereto as Exhibit U
and  incorporated  herein by  reference.  In  connection  therewith,  the Issuer
amended the terms of the April  Warrant,  primarily to change the exercise price
from  $9.50 per share to $6.00 per share and to extend  the date which the April
Warrant  expires  from April 4, 2001 to April 4, 2003.  Such  amended  terms are
reflected on the Amended and Restated Warrant to Purchase Common Stock issued to
S-C Rig III,  which is  attached  hereto as Exhibit V and which is  incorporated
herein by reference.

Item 7.        Material to be Filed as Exhibits.

               U. Amendment No. 1 to the Senior Loan  Agreement  dated April 22,
1996 between the Issuer and S-C Rig III.

               V. Amended and Restated  Warrant  Agreement  dated April 22, 1997
amending and  restating the Warrant  originally  issued April 4, 1996 to S-C Rig
III.




<PAGE>


                                                             Page 16 of 45 Pages



                                   SIGNATURES


          After  reasonable  inquiry and to the best of my knowledge and belief,
the  undersigned  certifies that the  information set forth in this statement is
true, complete and correct.



April 29, 1997                S-C RIG INVESTMENTS-III, L.P.

                              By:  S-C RIG CO., its General Partner


                                   By:  /S/ PETER HURWITZ
                                        ---------------------------------------
                                        Peter Hurwitz
                                        Vice President


                              S-C RIG CO.


                              By:  /S/ PETER HURWITZ
                                   --------------------------------------------
                                   Peter Hurwitz
                                   Vice President


                              WINSTON PARTNERS, L.P.

                              By:  Chatterjee Fund Management, L.P.,
                                   its General Partner

                                   By:  Purnendu Chatterjee,
                                        its General Partner

                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                                  Peter Hurwitz
                                                  Attorney-in-Fact

                              CHATTERJEE FUND MANAGEMENT, L.P.

                              By:  Purnendu Chatterjee,
                                   its General Partner

                                   By:  /S/ PETER HURWITZ
                                        ---------------------------------------
                                        Peter Hurwitz
                                        Attorney-in-Fact


<PAGE>


                                                             Page 17 of 45 Pages




                                        WINSTON PARTNERS II LDC



                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


                                        WINSTON PARTNERS II LLC

                                        By:  Chatterjee Advisors LLC,
                                             its Manager


                                             By:  /S/ PETER HURWITZ
                                                  -----------------------------
                                                  Peter Hurwitz
                                                  Manager


                                        CHATTERJEE ADVISORS LLC


                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Manager


                                        CHATTERJEE MANAGEMENT COMPANY


                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Vice President


                                        PURNENDU CHATTERJEE


                                        By:  /S/ PETER HURWITZ
                                             ----------------------------------
                                             Peter Hurwitz
                                             Attorney-in-Fact


<PAGE>


                                                             Page 18 of 45 Pages
<TABLE>
<CAPTION>


                                            ANNEX A

                           RECENT TRANSACTIONS IN THE COMMON STOCK OF
                                  GEOTEK COMMUNICATIONS, INC.

                                  Date of       Nature of        Number             Price
For the Account of              Transaction    Transaction      of Shares         Per Share
- ------------------              -----------    -----------      ---------         ---------
<S>                            <C>            <C>              <C>               <C>


S-C Rig Investments-III,
    L.P./1/                     04/16/97       Purchase          77,500           $3.773

                                04/16/97       Purchase         212,500            3.750

                                04/17/97       Purchase          25,000            3.875

                                04/17/97       Purchase          83,700            3.801

                                04/17/97       Purchase         151,200            3.811



</TABLE>




















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

/1/ Transactions effected at the direction of the General Partner.


<PAGE>


                                                             Page 19 of 45 Pages


                                INDEX OF EXHIBITS

EXHIBIT                                                                    PAGE
- -------                                                                    ----

U.        Amendment No. 1 to the Senior Loan Agreement dated
          April 22, 1997 between Geotek Communications, Inc.
          and S-C Rig Investments-III, L.P................................. 20

V.        Amended and Restated Warrant Agreement dated April
          22,  1997   amending  and  restating  the  Warrant
          originally   issued  April  4,  1996  to  S-C  Rig
          Investments-III, L.P............................................. 23






                                                             Page 20 of 45 Pages


                                    EXHIBIT U


                    AMENDMENT NO. 1 TO SENIOR LOAN AGREEMENT
                            DATED AS OF APRIL 4, 1996
                                     BETWEEN
                    GEOTEK COMMUNICATIONS, INC., AS BORROWER
                                       AND
                    S-C RIG INVESTMENTS-III, L.P., AS LENDER


     THIS AMENDMENT NO. 1 TO SENIOR LOAN AGREEMENT (this "Amendment") is made as
     ----------------------------------------------------------------
of the 22nd day of April,  1997,  by and among  GEOTEK  COMMUNICATIONS,  INC., a
Delaware  Corporation (the  "Borrower"),  and S-C RIG  INVESTMENTS-III,  L.P., a
                             -------- 
Delaware limited partnership (the "Lender").
                                   ------  

                              B A C K G R O U N D:

     The parties hereto entered into a Senior Loan Agreement dated as of the 4th
day of April, 1996 (the "Loan Agreement") pursuant to which the Lender agreed to
                         --------------
extend  credit in order to enable the  Borrower,  under the terms and subject to
the conditions set forth in the Loan Agreement, to borrow up to the sum of Forty
Million Dollars ($40,000,000).

     The parties have agreed to amend certain  provisions of the Loan  Agreement
as set forth herein.

                               A G R E E M E N T:

     Capitalized  terms used  herein and not  otherwise  defined  shall have the
meanings ascribed to such terms in the Loan Agreement.

     Section 1.15 of the Loan  Agreement is amended and restated in its entirety
to read as follows:

     "Funding  Cutoff  Date"  means the earlier of (i) April 4, 1999 or (ii) the
      ---------------------
date on which the  Commitment is otherwise  terminated  in  accordance  with the
terms hereof.

     Section 1.50 of the Loan  Agreement is amended and restated in its entirety
to read as follows:



<PAGE>


                                                             Page 21 of 45 Pages


     "Warrant"  means that  certain  Amended  and  Restated  Warrant to Purchase
      -------
Common Stock dated as of April 22, 1997,  amending  and  restating  that certain
Warrant to Purchase  Common  Stock dated as of April 4, 1996,  pursuant to which
the  Lender  shall  have the  right to  purchase  up to  4,210,526  (subject  to
adjustments as therein provided) shares of common stock of the Borrower.

     Section 2.1 of the Loan  Agreement is amended by replacing the entire third
sentence thereof with the following:

     "The unpaid principal  balance and any accrued but unpaid interest owing on
all Loans shall be payable in full on the  earliest  of (i) April 4, 2004,  (ii)
the fifth  anniversary of the date on which the last Loan is made hereunder,  or
(iii) the date on which the Loans are accelerated pursuant to Section 7.1 hereof
(such earliest date, the "Maturity Date")."
                          ------------- 

     Sections 2.2 of the Loan  Agreement  is amended by  replacing  "ten percent
(10%)" with "eight percent (8%)".

     Simultaneous with the execution of this Amendment,  Lender shall deliver to
Borrower the Warrant to purchase  Common  Stock of the  Company,  dated April 4,
1996,  issued to Lender in  connection  with the original  execution of the Loan
Agreement for  cancellation and Borrower shall deliver to Lender a duly executed
Warrant in the form attached hereto as Exhibit A.
                                       --------- 

     The Borrower represents and warrants to the Lender as follows:

     Corporate  Existence  and  Standing.  The  Borrower is a  corporation  duly
     -----------------------------------
incorporated,  validly  existing  and in good  standing  under  the  laws of its
jurisdiction  of  incorporation  and has all requisite  authority to conduct its
business in each  jurisdiction in which its business is conducted,  except where
the failure to so qualify would not have a Material Adverse Effect.

     Authorization  and  Validity.  The  Borrower  has the  corporate  power and
     ----------------------------  
authority to execute and deliver this  Amendment  and the Warrant and to perform
its obligations  thereunder.  The execution and delivery by the Borrower of this
Amendment and the Warrant and the performance of its obligations thereunder have
been duly  authorized  by all  proper  corporate  proceedings.  The  Obligations
constitute the legal, valid and binding obligations of the Borrower, enforceable
in accordance with their respective terms. The full number of Warrant Shares (as
defined in the Warrant)  initially  issuable  upon  exercise of the Warrant have
been properly  reserved by the Borrower  and, upon exercise of the Warrant,  all
such Warrant Shares shall be duly and validly issued and shall  constitute fully
paid and non-assessable shares of Common Stock of the Borrower.


<PAGE>


                                                             Page 22 of 45 Pages


     Except as expressly  supplemented  and/or modified herein, the terms of the
Loan Agreement shall continue in full force and effect.



<PAGE>


                                                             Page 23 of 45 Pages



     IN WITNESS WHEREOF, the Borrower and Lender have executed this Amendment as
of this 22nd day of April, 1997.

                                        Borrower:
                                        --------

                                        GEOTEK COMMUNICATIONS, INC.


                                        By:
                                             ----------------------------------
                                             Name:
                                             Title:


                                        Lender:
                                        ------

                                        S-C RIG INVESTMENTS-III, L.P.

                                        By:  S-C Rig Co.
                                             its general partner

                                        By:
                                             ----------------------------------
                                             Name:
                                             Title:



                                                             Page 24 of 45 Pages

                                    EXHIBIT V


NEITHER THIS AMENDED AND RESTATED  WARRANT (THE  "WARRANT")  NOR THE  SECURITIES
ISSUABLE  UPON  EXERCISE  HEREOF NOR ANY  INTEREST  OR  PARTICIPATION  HEREIN OR
THEREIN MAY BE OFFERED, SOLD, ASSIGNED, PLEDGED, HYPOTHECATED,  ENCUMBERED OR IN
ANY OTHER  MANNER  TRANSFERRED  OR  DISPOSED OF IN THE UNITED  STATES  EXCEPT IN
COMPLIANCE WITH THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT"),
ANY APPLICABLE  STATE SECURITIES LAWS AND THE TERMS AND CONDITIONS  HEREOF.  THE
HOLDER OF THIS WARRANT AND THE  SECURITIES  ISSUABLE  UPON  EXERCISE  HEREOF ARE
SUBJECT TO THE RESTRICTIONS HEREIN SET FORTH.

VOID AFTER 5:00 P.M., NEW YORK, NEW YORK TIME, APRIL 4, 2003

                     ***************************************

                          AMENDED AND RESTATED WARRANT

                                       to

                              PURCHASE COMMON STOCK

                                       of

                           GEOTEK COMMUNICATIONS, INC.

                       AMENDING AND RESTATING THE WARRANT
                       ORIGINALLY ISSUED ON APRIL 4, 1996
           IN CONNECTION WITH THAT CERTAIN SENIOR LOAN AGREEMENT DATED
                APRIL 4, 1996 BETWEEN GEOTEK COMMUNICATIONS, INC.
                        AND S-C RIG INVESTMENTS-III, L.P.

                     ***************************************

               This certifies that, for good and valuable consideration,  Geotek
Communications,  Inc., a Delaware corporation (the "Company"), grants to S-C Rig
Investments - III, L.P., a Delaware limited partnership, or permitted registered
assigns (the  "Warrantholder" or  "Warrantholders"),  the right to subscribe for
and  purchase  from the  Company,  at a  purchase  price of $6.00 per share (the
"Exercise  Price"),  at any time and from  time to time  after  the date  hereof
(i.e.,  April 22, 1997)(the  "Initial Exercise Date"), and to and including 5:00
P.M. New York City time on April 4, 2003 (the "Expiration  Date"),  Four Million
Two Hundred Ten Thousand Five Hundred and Twenty-six (4,210,526) shares, as such

<PAGE>


                                                             Page 25 of 45 Pages

number of shares may be adjusted  from time to time (the "Warrant  Shares"),  of
the  Company's  Common  Stock,  par value $.01 per share (the  "Common  Stock"),
subject to the provisions  and upon the terms and  conditions  herein set forth.
The Exercise  Price and the number of Warrant  Shares are subject to  adjustment
from time to time as provided in Section 6.

       SECTION 1. Exercise of Warrant; Limitation on Exercise; Payment of Taxes.
                  -------------------------------------------------------------

1.1    Exercise of Warrant.
       -------------------

       (a) Subject to Section 1.2 hereof,  the  Warrantholder  may exercise this
Warrant, in whole or in part at any time and from time to time after the Initial
Exercise Date, by  presentation  and surrender of this Warrant to the Company at
its principal executive offices or at the office of its stock transfer agent, if
any, with the Subscription  Form annexed hereto duly executed and accompanied by
cash payment of the full Exercise Price for each Warrant Share to be purchased.

       (b) Upon  receipt  of this  Warrant,  with  the  Subscription  Form  duly
executed and  accompanied  by payment of the  aggregate  Exercise  Price for the
Warrant Shares for which this Warrant is then being exercised, the Company shall
cause to be issued  certificates  for the total number of whole shares of Common
Stock for which this Warrant is being exercised  (adjusted to reflect the effect
of the  antidilution  provisions  contained in Section 6 hereof,  if any, and as
provided in Sections 5 and 7.8 hereof) in such  denominations  as are  requested
for delivery to the Warrantholder,  and the Company shall thereupon deliver such
certificates to the Warrantholder.  The stock certificates so delivered shall be
in such  denominations  as may be  specified by the  Warrantholder  and shall be
issued in the name of the  Warrantholder  or, if  permitted  by Section 5 and in
accordance with the provisions  thereof,  such other name as shall be designated
in the Subscription Form. The Warrantholder  shall be deemed to be the holder of
record  of  the   shares  of  Common   Stock   issuable   upon  such   exercise,
notwithstanding  that the stock  transfer  books of the  Company  shall  then be
closed or that  certificates  representing such shares of Common Stock shall not
then be actually delivered to the Warrantholder.  If at the time this Warrant is
exercised,  a  registration  statement  is not in effect to  register  under the
Securities  Act the Warrant Shares  issuable upon exercise of this Warrant,  the
Company may require the Warrantholder to make such customary representations and
deliver such customary opinions of counsel, and may place such customary legends
on certificates  representing the Warrant Shares, as may be reasonably  required
in the  opinion  of counsel to the  Company to permit the  Warrant  Shares to be
issued without such registration.

       (c) If this Warrant shall have been  exercised  only in part, the Company
shall,  at the time of delivery  of the  certificates  for the  Warrant  Shares,
deliver to the Warrantholder a new Warrant evidencing the rights to purchase the

<PAGE>


                                                             Page 26 of 45 Pages

remaining  Warrant  Shares,  which new  Warrant  shall in all other  respects be
identical  with this Warrant.  No adjustments or payments shall be made on or in
respect of Warrant  Shares  issuable  on the  exercise  of this  Warrant for any
regular  cash  dividends  paid or payable  to holders of record of Common  Stock
prior to the date as of which the Warrantholder shall be deemed to be the record
holder of such Warrant Shares.

       1.2  Limitation on Exercise.  If this Warrant is not  exercised  prior to
            ----------------------
5:00 P.M. on the Expiration  Date (or the next  succeeding  Business Day, if the
Expiration  Date is a  Saturday,  Sunday  or a day on which  the New York  Stock
Exchange is authorized to close or on which the Company is otherwise  closed for
business (a "Nonbusiness Day"), this Warrant, or any new Warrant issued pursuant
to Section  1.1,  shall cease to be  exercisable  and shall  become void and all
rights of the  Warrantholder  hereunder  shall cease.  This Warrant shall not be
exercisable  and no Warrant Shares shall be issued  hereunder prior to 9:00 a.m.
New York City time on the Initial Exercise Date. In addition, this Warrant shall
not be  exercisable  at any time that the lender under that certain  Senior Loan
Agreement  dated as of April 4, 1996 by and  between the Company and the initial
holder of this  Warrant (as the same has been or hereafter  may be amended,  the
"Loan Agreement")  shall be in material breach of its obligations  thereunder or
at any time after a  permissible  termination  of the Loan  Agreement  resulting
directly from a material breach by such lender thereunder.

       1.3 Payment of Exercise Price.  Payment of the Exercise Price pursuant to
           ------------------------- 
Section  1.1(a)  shall be made to the Company in cash;  by certified or official
bank check payable in United States  dollars to the order of the Company;  or by
any combination of the foregoing.

       1.4 Payment of Taxes.  The issuance of  certificates  for Warrant  Shares
           ----------------
shall be made  without  charge to the  Warrantholder  for any stock  transfer or
other issuance tax in respect thereto; provided, however, that the Warrantholder
shall be  required  to pay any and all taxes  which may be payable in respect to
any  transfer  involved in the issuance  and  delivery of any  certificates  for
Warrant Shares in a name other than that of the then  Warrantholder as reflected
upon the books of the Company.

     SECTION 2.     Reservation and Listing of Shares, Etc.
                    --------------------------------------- 

               All  Warrant  Shares  which are issued  upon the  exercise of the
rights  represented  by this  Warrant  shall,  upon  issuance and payment of the
Exercise  Price,  be validly issued,  fully paid and  nonassessable  without any
preemptive rights, and free from all taxes, liens,  security interests,  charges
and other  encumbrances  with respect to the issue  thereof  other than taxes in
respect of any transfer occurring  contemporaneously with such issue. During the
period  within which this  Warrant may be  exercised,  the Company  shall at all
times have authorized and reserved,  and keep available and free from preemptive
rights, and free from all taxes, liens,  security  interests,  charges and other
encumbrances with respect to the issue thereof, a sufficient number of shares of
Common Stock to provide for the exercise of this Warrant, and if at any time the
number of authorized but unissued shares of Common Stock shall not be sufficient
to effect the exercise of this  Warrant,  in addition to such other  remedies as
shall be available  to a  Warrantholder,  the Company  will take such  corporate
action as may, in the  opinion of its  counsel,  be  necessary  to increase  its
authorized but unissued shares of Common Stock to such number of shares as shall
be  sufficient  for such  purposes.  In  addition,  prior to the issuance of any
Warrant  Shares,  the Company  shall at its  expense  procure the listing of the
Warrant  Shares (or any other issues of capital stock issuable upon the exercise
of this  Warrant if such other class of capital  stock is then so listed)  which
shall be issued upon  exercise of this  Warrant  (subject to official  notice of
issuance)  as  then  may be  required  on all  stock  exchanges  or  interdealer
quotation  systems on which the Common  Stock is then listed and shall  maintain

<PAGE>

                                                             Page 27 of 45 Pages

such  listing if and so long as any shares of the same class  shall be listed on
such stock exchanges or interdealer  quotation systems.  The Company shall, from
time to time,  take all such  action as may be  required  to assure that the par
value per share of the Warrant  Shares is at all times equal to or less than the
then effective Exercise Price.

     SECTION 3.     Exchange, Loss or Destruction of Warrant.
                    ----------------------------------------

       If permitted by Section 5 and in accordance with the provisions  thereof,
upon surrender of this Warrant to the Company with a duly executed instrument of
assignment  and funds  sufficient  to pay any transfer  tax, the Company  shall,
without  charge,  execute and deliver a new Warrant of like tenor in the name of
the assignee  named in such  instrument  of  assignment  and this Warrant  shall
promptly  be  canceled.  Upon  receipt  by the  Company of  evidence  reasonably
satisfactory  to it of the  loss,  theft,  destruction  or  mutilation  of  this
Warrant,  and,  in the  case of  loss,  theft or  destruction,  of such  bond or
indemnification as the Company may reasonably require,  and, in the case of such
mutilation,  upon surrender and  cancellation of this Warrant,  the Company will
execute  and deliver a new Warrant of like  tenor.  The term  "Warrant"  as used
herein includes any Warrants issued in substitution or exchange of this Warrant.


     SECTION 4.     Ownership of Warrant; Certain Rights of Warrantholders.
                    -------------------------------------------------------

       (a) The Company may deem and treat the person in whose name this  Warrant
is registered as the holder and owner hereof  (notwithstanding  any notations of
ownership  or writing  hereon  made by anyone  other than the  Company)  for all
purposes  and  shall  not be  affected  by any  notice  to the  contrary,  until
presentation  of this  Warrant  for  registration  of  transfer  as  provided in
subsection 1.1, Section 3 or Section 5.

       (b) Nothing  contained in this Warrant  shall be construed as  conferring
upon the  Warrantholder  or its  transferees  the  right  to vote or to  receive
dividends or to consent or to receive  notice as a stockholder in respect of any

<PAGE>


                                                             Page 28 of 45 Pages

meeting of  stockholders  for the election of directors of the Company or of any
other matter,  or any rights  whatsoever  as  stockholders  of the Company.  The
Company shall give notice to the Warrantholder by registered mail if at any time
prior  to the  expiration  or  exercise  in  full  of the  Warrants,  any of the
following events shall occur:

               (i) the  Company  shall  authorize  the  payment of any  dividend
payable in any securities upon shares of Common Stock or authorize the making of
any  distribution  (other than a regular cash  dividend  paid out of net profits
legally available therefor) to all holders of Common Stock;

               (ii) the Company  shall  authorize the issuance to all holders of
Common Stock of any  additional  shares of Common Stock or  securities  that are
convertible  into or  exercisable  for  shares of Common  Stock  ("Common  Stock
Equivalents")  or of rights,  options or warrants to  subscribe  for or purchase
Common Stock or Common Stock  Equivalents or of any other  subscription  rights,
options or warrants;

               (iii) a dissolution, liquidation or winding up of the Company; or
Page 24 of 45 Pages

               (iv) a capital  reorganization or  reclassification of the Common
Stock (other than a subdivision or combination of the  outstanding  Common Stock
and  other  than  a  change  in  the  par  value  of the  Common  Stock)  or any
consolidation or merger of the Company with or into another  corporation  (other
than  a  consolidation  or  merger  in  which  the  Company  is  the  continuing
corporation and that does not result in any reclassification or change of Common
Stock  outstanding)  or in the  case  of  any  sale  or  conveyance  to  another
corporation of the property of the Company as an entirety or substantially as an
entirety or a tender offer or exchange offer for shares of Common Stock.

               Such giving of notice  shall be  initiated at least 20 days prior
to the date fixed as a record date or  effective  date or the date of closing of
the Company's  stock transfer books for the  determination  of the  stockholders
entitled to such dividend, distribution, issuance or subscription rights, or for
the determination of the stockholders  entitled to vote on such proposed merger,
consolidation,  sale, conveyance,  dissolution,  liquidation or winding up or to
participate in such tender or exchange offer.  Such notice shall specify (A) the
date as of which the holders of record of shares of Common  Stock to be entitled
to  receive  any  such  rights,  options,  warrants  or  distribution  are to be
determined,  or (B) the initial expiration date set forth in any tender offer or
exchange offer for shares of Common Stock or any securities  convertible into or
exchangeable for Common Stock, or (C) the date on which any such reorganization,
reclassification,   consolidation,   merger,  sale,   conveyance,   dissolution,
liquidation or winding up is expected to become  effective or  consummated,  and
the date as of which it is  expected  that  holders  of  record  of  shares  for
securities or other  property,  if any,  deliverable  upon such  reorganization,
reclassification,   consolidation,   merger,  sale,   conveyance,   dissolution,
liquidation  or winding up.  Failure to provide such notice shall not affect the

<PAGE>

                                                             Page 29 of 45 Pages


validity of any action taken in  connection  with such  dividend,  distribution,
issuance or  subscription  rights,  or  proposed  merger,  consolidation,  sale,
conveyance,  tender offer, exchange offer,  dissolution,  liquidation or winding
up.

       SECTION 5.   Split-Up, Combination, Exchange and Transfer of Warrants.
                    --------------------------------------------------------

       (a) Subject to the provisions of Section 5(b),  this Warrant may be split
up,  combined or exchanged for another  Warrant or Warrants  containing the same
terms  to  purchase  a  like  aggregate   number  of  Warrant  Shares.   If  the
Warrantholder  desires to split up, combine or exchange this Warrant, he, she or
it shall  make such  request  in  writing  delivered  to the  Company  and shall
surrender to the Company this Warrant and any other  Warrants to be so split up,
combined or exchanged.  Upon any such  surrender for a split up,  combination or
exchange, the Company shall execute and deliver to the person entitled thereto a
Warrant or Warrants, as the case may be, as so requested.  The Company shall not
be required to effect any split up, combination or exchange which will result in
the issuance of a warrant  entitling the Warrantholder to purchase upon exercise
a fraction of a share of Common Stock or a fractional  Warrant.  The Company may
require  such  Warrantholder  to  pay a sum  sufficient  to  cover  any  tax  or
governmental  charge  that may be  imposed  in  connection  with any  split  up,
combination or exchange of Warrants.

       (b)  Neither  this  Warrant not the  Warrant  Shares may be  transferred,
disposed of or encumbered (any such action,  a "Transfer")  except in accordance
with and subject to the provisions of the Securities  Act, any applicable  state
securities laws and the rules and regulations promulgated thereunder.  If at the
time of a Transfer,  a registration  statement is not in effect to register this
Warrant or the Warrant Shares, the Company may require the Warrantholder to make
such customary  representations  and deliver such customary opinions of counsel,
and may place such customary legends on certificates  representing this Warrant,
as may be reasonably required in the opinion of counsel to the Company to permit
a Transfer without such registration.

       SECTION 6.  Adjustments  of Exercise  Price and Number of Warrant  Shares
                   -------------------------------------------------------------
Issuable.  The Exercise Price and the number of Warrant Shares issuable upon the
- --------
exercise of this  Warrant are subject to  adjustment  from time to time upon the
occurrence  of the events  enumerated  in this  Section 6. For  purposes of this
Section 6, "Common  Stock" means the Common Stock and any other capital stock of
the Company, however designated, for which the Warrants may be exercisable.

       (a)     Adjustment for Change in Capital Stock.

               If the Company:

               (i) pays a dividend or makes a  distribution  on its Common Stock
in shares of its Common Stock;


<PAGE>


                                                             Page 30 of 45 Pages



               (ii)  subdivides  its  outstanding  shares of Common Stock into a
greater number of shares;

               (iii)  combines  its  outstanding  shares of Common  Stock into a
smaller number of shares;

               (iv) makes a  distribution  on its Common  Stock in shares of its
capital stock other than Common Stock; or

               (v) issues by  reclassification of its Common Stock any shares of
its capital stock,

then the  Exercise  Price and the number and kind of shares of capital  stock of
the Company issuable upon the exercise of this Warrant (as in effect immediately
prior  to  such  action)   shall  be   proportionately   adjusted  so  that  the
Warrantholder may receive,  upon exercise of this Warrant,  the aggregate number
and kind of shares of  capital  stock of the  Company  which he would have owned
immediately following such action if this Warrant had been exercised immediately
prior to such action.

          The adjustment  shall become  effective  immediately  after the record
date,  subject to subsection (n) of this Section 6, in the case of a dividend or
distribution  and  immediately  after  the  effective  date  in  the  case  of a
subdivision, combination or reclassification.

          If after an adjustment,  a Warrantholder  shall be entitled to receive
shares of two or more  classes or series of capital  stock of the  Company  upon
exercise of this  Warrant,  the Company shall  determine  the  allocation of the
adjusted  Exercise Price between the classes or series of capital  stock.  After
such allocation,  the exercise privilege and the Exercise Price of each class or
series of capital  stock  shall  thereafter  be subject to  adjustment  on terms
comparable to those applicable to Common Stock in this Section 6.

          Such adjustment shall be made  successively  whenever any event listed
above shall occur.

          (b)  Adjustment  for Rights  Issue.  If the  Company  distributes  any
               -----------------------------
rights,  options or warrants to all holders of its Common Stock  entitling  them
for a period  expiring  within 60 days after the record date mentioned  below to
purchase shares of Common Stock or securities convertible into or exercisable or
exchangeable  for  shares  of Common  Stock at a price  per share  less than the
current market price per share (including, in the case of securities convertible
into  or  exercisable  or   exchangeable   for  shares  of  Common  Stock,   the
consideration payable for such convertible, exercisable or exchangeable security
and the minimum consideration per share payable upon the conversion, exercise or
exchange of such  security  into or for Common  Stock) on that record date,  the

<PAGE>

                                                             Page 31 of 45 Pages

Exercise Price shall be adjusted in accordance with the following formula:

                                    O + N x P
                                        -----
                              E' = E x    M
                                        -----   
                                        O + N

               where:

               E'= the adjusted Exercise Price.

               E = the current Exercise Price.

               O = the number of shares of Common Stock  outstanding on the
                   record date.

               N = the number of additional shares of Common Stock offered.

               P = the offering price per share of the additional shares.

               M = the current  market  price per share of Common  Stock on
                   the record date.

          The adjustment  shall be made  successively  whenever any such rights,
options or warrants are issued and shall become effective  immediately after the
record  date for the  determination  of  stockholders  entitled  to receive  the
rights,  options  or  warrants.  If at the end of the period  during  which such
rights, options or warrants are exercisable, not all rights, options or warrants
shall have been exercised, the Exercise Price shall be immediately readjusted to
what it would  have  been if "N" in the  above  formula  had been the  number of
shares actually issued.

          (c) Adjustment for Other Distributions.  If the Company distributes to
              ----------------------------------
all  holders of its Common  Stock any of its  assets or debt  securities  or any
rights or warrants to purchase debt  securities,  assets or other  securities of
the  Company,  the  Exercise  Price  shall be adjusted  in  accordance  with the
following formula:

               E'  =  E  x  M - F
                            -----
                              M
               where:

               E' = the adjusted Exercise Price.

               E = the current Exercise Price.

<PAGE>


                                                             Page 32 of 45 Pages



               M  =   the current  market  price per share of Common  Stock on
                      the record date  mentioned in the  immediately  succeeding
                      paragraph.

               F  =   the fair market  value on the record date of the assets,
                      securities,  rights or warrants applicable to one share of
                      Common Stock.  The Board of Directors  shall determine the
                      fair market value.

          The  adjustment   shall  be  made   successively   whenever  any  such
distribution  is made and shall become  effective  immediately  after the record
date for the determination of stockholders entitled to receive the distribution.

          This subsection (c) does not apply to:

               (i) rights,  options or warrants referred to in subsection (b) of
this Section 6, or

               (ii)  cash   dividends   or  cash   distributions   paid  out  of
consolidated  current or retained  earnings as shown on the books of the Company
prepared in accordance with generally accepted accounting  principles other than
any  Extraordinary  Cash Dividend (as defined  below).  An  "Extraordinary  Cash
Dividend"  shall be that portion,  if any, of the  aggregate  amount of all cash
dividends paid in any fiscal year which exceeds $25 million.  In all cases,  the
Company shall give the Warrant  holders at least 30 days notice of a record date
for any dividend payment on its Common Stock.

          (d) Adjustment for Common Stock Issue. If the Company issues shares of
              ---------------------------------
Common Stock for a  consideration  per share less than the current  market price
per share on the date the Company  fixes the offering  price of such  additional
shares, the Exercise Price shall be adjusted in accordance with the formula:



                                          P
                                          -
                       E'  =  E  x   O + M
                                     -----
                                       A

               where:

               E' = the adjusted Exercise Price.

               E = the then current Exercise Price.

               O = the number of shares  outstanding  immediately  prior to
                   the issuance of such additional shares.


<PAGE>
                                                             Page 33 of 45 Pages


               P  =   the aggregate consideration received for the issuance of
                      such additional shares.

               M  =   the  current  market  price  per  share  on the date the
                      Company  fixes  the  offering  price  of  such  additional
                      shares.

               A  =   the number of shares  outstanding  immediately after the
                      issuance of such additional shares.

          The adjustment shall be made  successively  whenever any such issuance
is made, and shall become effective immediately after such issuance.

          This subsection (d) does not apply to:

               (i) any of the transactions  described in subsections (a), (b)and
(c) of this Section 6,

               (ii)  the   conversion,   exercise  or  exchange  of   securities
convertible or exchangeable for Common Stock,

               (iii)  Common  Stock  issuable  upon the  exercise  of  rights or
warrants issued to the holders of Common Stock,

               (iv) Common  Stock  issued to  shareholders  of any person  which
merges into the  Company in  proportion  to their stock  holdings of such person
immediately prior to such merger, upon such merger,

               (v) Common Stock issued in a bona fide public  offering  pursuant
to a firm commitment underwriting, or

               (vi) Common Stock issued in a bona fide private placement through
a  placement  agent  which  is a  member  firm of the  National  Association  of
Securities  Dealers,  Inc.  (except to the  extent  that any  discount  from the
current market price  attributable  to restrictions  on  transferability  of the
Common  Stock,  as  determined  in good  faith  by the  Board of  Directors  and
described  in a Board  resolution  which shall be filed with the Warrant  Agent,
shall exceed 20%).

<PAGE>

                                                             Page 34 of 45 Pages


               (e) Adjustment for Convertible  Securities  Issue. If the Company
                   --------------------------------------------- 
issues any securities convertible into or exercisable or exchangeable for Common
Stock (other than  securities  issued in  transactions  described in subsections
(a), (b) and (c) of this Section 6) for a consideration per share (including the
minimum consideration per share payable upon conversion, exercise or exchange of
any securities convertible into or exercisable or exchangeable for Common Stock)
of Common Stock initially  deliverable upon conversion,  exercise or exchange of
such  securities  less than the current  market  price per share on the date the
Company fixes the offering price of such securities, the Exercise Price shall be
adjusted in accordance with this formula:

                                          P
                                          - 
                       E'  =  E  x   O + M
                                     -----
                                     O + D

               where:

               E' = the adjusted Exercise Price.

               E  = the then current Exercise Price.

               O  = the number of shares  outstanding  immediately  prior to
                    the issuance of such securities.

               P  = the aggregate consideration received for the issuance of
                    such securities.

               M  = the  current  market  price  per  share  on the date the
                    Company fixes the offering price of such securities.

               D  = the maximum number of shares deliverable upon conversion
                    or exercise of or in exchange for such  securities  at the
                    initial conversion, exercise or exchange rate.

               The  adjustment  shall  be made  successively  whenever  any such
issuance is made, and shall become effective immediately after such issuance.

               If all of the Common Stock deliverable upon conversion,  exercise
or exchange of such  securities has not been issued when such  securities are no
longer outstanding,  then the Exercise Price shall promptly be readjusted to the
Exercise  Price  which  would  then be in  effect  had the  adjustment  upon the
issuance  of such  securities  been  made on the basis of the  actual  number of
shares of Common  Stock  issued  upon  conversion,  exercise or exchange of such
securities.

<PAGE>


                                                             Page 35 of 45 Pages


               This subsection (e) does not apply to:

                    (i)  convertible,  exercisable  or  exchangeable  securities
issued to  shareholders  of any person which merges into the Company,  or with a
subsidiary of the Company,  in proportion to their stock holdings of such person
immediately prior to such merger, upon such merger,

                    (ii)  convertible,  exercisable or  exchangeable  securities
issued in a bona fide public offering pursuant to a firm commitment underwriting
or pursuant to agreements in effect on the date of issuance of this Warrant,

                    (iii)  convertible,  exercisable or exchangeable  securities
issued in a bona fide  private  placement  through a placement  agent which is a
member firm of the National  Association of Securities Dealers,  Inc. (except to
the extent that any  discount  from the current  market  price  attributable  to
restrictions on  transferability  of Common Stock issuable upon  conversion,  as
determined  in good faith by the Board of  Directors  and  described  in a Board
resolution  which shall be filed with the Trustee,  shall exceed 20% of the then
current market price) or

                    (iv)  stock  options  issued  to  the  Company's  directors,
officers or employees.

               (f)  Adjustment for Tender or Exchange  Offer.  If the Company or
any Subsidiary of the Company  consummates a tender or exchange offer for all or
any  portion  of  the  Common  Stock  or  any  securities  convertible  into  or
exercisable or  exchangeable  for Common Stock,  to the extent that the cash and
value of any other  consideration  included in such  payment per share of Common
Stock (determined on an as-converted  basis in the case of any such convertible,
exercisable  or  exchangeable  securities so tendered or exchanged)  exceeds the
average of the Quoted Prices (as defined in subsection (g) of this Section 6) of
the Common Stock for the five consecutive trading days (the "Adjustment Period")
commencing on the first trading day (such trading day, the "First  Trading Day")
immediately following the last time tenders or exchanges may be made pursuant to
such tender or exchange offer (the "Expiration  Time"), the Exercise Price shall
be adjusted in accordance with this formula:

               E' =      E x O x M
                             ------------- 
                               P + (A x M)

               E'=  the adjusted Exercise Price.

               E =  the current Exercise Price.

               O =  the number of shares of Common Stock outstanding immediately
                    prior to the Expiration Time, including,  in the case of any
                    tender  or   exchange   offer  in  respect   of   securities
                    convertible  into or exercisable or exchangeable  for Common
                    Stock,   any  shares  of  Common  Stock  issuable  upon  the
                    conversion, exercise or exchange of such securities.

<PAGE>

                                                             Page 36 of 45 Pages

               M =  the average of the Quoted  Prices (as defined in  subsection
                    (g)  of  this  Section  6)  of  the  Common  Stock  for  the
                    Adjustment Period.

               P =  the aggregate cash  consideration  and the fair market value
                    of any non-cash  consideration payable to stockholders based
                    on the  number  of shares  of  Common  Stock (or  securities
                    convertible  into or exercisable or exchangeable  for Common
                    Stock)   tendered  or  exchanged   (and  not  withdrawn)  in
                    connection with the tender or exchange offer and accepted by
                    the Company. The Board of Directors shall determine the fair
                    market value of any non-cash consideration.

               A =  the number of shares of Common Stock outstanding at the time
                    of  acceptance  by the Company of any shares of Common Stock
                    (or   securities   convertible   into  or   exercisable   or
                    exchangeable  for Common Stock) so tendered or exchanged and
                    accepted  by the  Company,  including,  in the  case  of any
                    tender  or   exchange   offer  in  respect   of   securities
                    convertible  into or exercisable or exchangeable  for Common
                    Stock,   any  shares  of  Common  Stock  issuable  upon  the
                    conversion, exercise or exchange of such securities.

               The  adjustment  shall  be made  successively  whenever  any such
tender or exchange offer is made. To the extent a Warrant holder  exercises such
holder's  Warrant(s)  prior to the  conclusion  of the  Adjustment  Period,  any
adjustment  in the number of  Warrant  Shares  issuable  upon  exercise  of such
Warrant(s)  shall be for the benefit of the holder of record of such  Warrant(s)
at the close of trading on the First Trading Day.

               This  subsection  (f) does not apply to redemptions of securities
pursuant to redemption  provisions  contained in the  certificate of designation
pertaining to such securities in effect at the time such securities were issued,
whether such redemptions are optional or mandatory.

               (g) Current Market Price. In subsections (b), (c), (d) and (e) of
                   --------------------
this  Section 6, the current  market price per share of Common Stock on any date
is the  average of the  Quoted  Prices of the  Common  Stock for 30  consecutive
trading days commencing 45 trading days before the date in question. The "Quoted
Price" of the Common Stock is the last reported  sales price of the Common Stock
on any  national  securities  exchange on which the Common Stock is listed which

<PAGE>

                                                             Page 37 of 45 Pages

shall be for consolidated  trading if applicable to such exchange,  or if not so
listed,  the last reported bid price of the Common Stock.  In the absence of one
or more such  quotations,  the Board of Directors of the Company shall determine
the  current  market  price  on  such  basis  as  it  in  good  faith  considers
appropriate.

               (h)  Consideration  Received.  For  purposes  of any  computation
                    -----------------------
respecting  consideration  received  pursuant to subsections (d) and (e) of this
Section 6, the following shall apply:

                    (i) in the case of the  issuance  of shares of Common  Stock
for cash, the consideration  shall be the amount of such cash,  provided that in
no case shall any  deduction  be made for any  commissions,  discounts  or other
expenses  incurred by the Company for any underwriting of the issue or otherwise
in connection therewith;

                    (ii) in the case of the  issuance of shares of Common  Stock
for a consideration in whole or in part other than cash, the consideration other
than cash shall be deemed to be the fair market value  thereof as  determined in
good faith by the Company's Board of Directors  (irrespective  of the accounting
treatment  thereof),  whose determination shall be conclusive and described in a
Board resolution; and

                    (iii) in the case of the issuance of securities  convertible
into or  exercisable or  exchangeable  for shares,  the aggregate  consideration
received  therefor  shall be  deemed  to be the  consideration  received  by the
Company  for the  issuance  of  such  securities  plus  the  additional  minimum
consideration,  if any,  to be  received  by the  Company  upon the  conversion,
exercise or exchange thereof (the consideration in each case to be determined in
the same manner as provided in clauses (i) and (ii) of this subsection).

               (j) When De Minimis Adjustment May Be Deferred.  No adjustment in
                   ------------------------------------------
the Exercise Price need be made unless the adjustment  would require an increase
or decrease of at least 1% in the Exercise Price.  Any adjustments  that are not
made  shall  be  carried  forward  and  taken  into  account  in any  subsequent
adjustment.

               All  calculations  under  this  Section  6  shall  be made to the
nearest cent or to the nearest 1/100th of a share, as the case may be.

               (k) When No Adjustment Required. No adjustment need be made for a
                   ---------------------------
transaction  referred to in subsections  (a),  (b),(c),  (d), (e) or (f) of this
Section 6 if Warrant  holders are to participate  in the  transaction on a basis
and  with  notice  that  the  Board  of  Directors  determines  to be  fair  and
appropriate  in light of the basis and notice on which  holders of Common  Stock
participate in the transaction.
<PAGE>


                                                             Page 38 of 45 Pages


               No adjustment  need be made for (i) a transaction  referred to in
subsections  (b), (d) or (e) of this  Section 6 if the below  market  portion of
such  issuances,  taken  together  with the  below  market  portions  all  other
issuances  and with the above market  portions of all tender or exchange  offers
described  in clause (ii) of this  paragraph  made on and after the date of this
Agreement,  is less than 2.0% of the Total Market  Capitalization of the Company
(determined  by  reference  to the  sum  of  the  percentages  of  Total  Market
Capitalization of the Company  attributable to each such transaction on the date
thereof) and (ii) a transaction  referred to in subsection (f) of this Section 6
if the above market  portion of such tender or exchange  offers,  taken together
with the above market  portions of all other tender or exchange  offers and with
the below  market  portions  of all  issuances  described  in clause (i) of this
paragraph made on or after the date of this Agreement,  is less than 2.0% of the
Total Market  Capitalization of the Company  (determined by reference to the sum
of the percentages of Total Market Capitalization of the Company attributable to
each such transaction on the date thereof). For purposes of this Agreement,  the
Total  Market  Capitalization  of  the  Company  shall  mean  as of  any  day of
determination,  the sum of (a) the consolidated  indebtedness of the Company and
its subsidiaries on such day plus (b) the product of (i) the Company's aggregate
number of  outstanding  primary  shares of Common Stock on such day (which shall
not  include  any  options  or  warrants  on,  or  securities   convertible   or
exchangeable  into,  shares of Common Stock other than,  any shares of preferred
stock of the Company, that, as of the day of determination,  cannot, pursuant to
the terms  thereof as in effect on the date of this  Warrant,  be required to be
redeemed by the Company in cash),  and (ii) the  average  closing  price of such
Common Stock over the 20  consecutive  trading days  immediately  preceding such
day, plus (c) the liquidation value of any outstanding shares of preferred stock
of the  Company on such day. If no such  closing  price  exists with  respect to
shares of any such class,  the value of such  shares for  purposes of clause (b)
for the  preceding  sentence  shall  be  determined  by the  Company's  Board of
Directors in good faith.

               No adjustment need be made for a change in the par value, or from
par value to no par  value,  or from no par value to par  value,  of the  Common
Stock.

               To the extent  the  Warrants  become  convertible  into cash,  no
adjustment need be made  thereafter as to the cash.  Interest will not accrue on
the cash.

               (l)  Voluntary  Reduction.  The Company from time to time may, as
                    --------------------
the Board of  Directors  deems  appropriate,  reduce the  Exercise  Price by any
amount  for any  period  of time if the  period  is at  least 20 days and if the
reduction is  irrevocable  during the period;  provided that in no event may the
Exercise Price be less than the par value of a share of Common Stock.

               Whenever the Exercise Price is reduced, the Company shall mail to
Warrant holders a notice of the reduction.  The Company shall mail the notice at
least 15 days  before the date the reduced  Exercise  Price  takes  effect.  The
notice  shall  state the  reduced  Exercise  Price and the  period it will be in
effect.

<PAGE>


                                                             Page 39 of 45 Pages

               A voluntary  reduction  of the  Exercise  Price  pursuant to this
Section 6(k), other than a reduction which the Company has irrevocably committed
will be in effect for so long as any Warrants are  outstanding,  does not change
or adjust the Exercise  Price  otherwise  in effect for purposes of  subsections
(a), (b), (c), (d), (e) and (f) of this Section 6.

               (m) Reorganization of the Company.
                   ----------------------------- 

                    (i) If the Company  consolidates  or merges with or into, or
transfers  or leases all or  substantially  all its assets to, any person,  upon
consummation  of  such  transaction  this  Warrant  shall  automatically  become
exercisable  for the kind and amount of  securities,  cash or other assets which
the holder of a Warrant would have owned  immediately  after the  consolidation,
merger,  transfer or lease if the holder had exercised  the Warrant  immediately
before the effective date of the transaction. Concurrently with the consummation
of  such  transaction,   the  corporation   formed  by  or  surviving  any  such
consolidation  or merger if other than the Company,  or the person to which such
sale or  conveyance  shall  have  been made (any  such  person,  the  "Successor
Entity"),  shall enter into a  supplemental  agreement so providing  and further
providing  for  adjustments  which  shall  be as  nearly  equivalent  as  may be
practical  to the  adjustments  provided  for in this  Section 6. The  Successor
Entity shall mail to the Warrant  holder a notice  describing  the  supplemental
agreement. If the issuer of securities deliverable upon exercise of this Warrant
under the  supplemental  agreement  is an  affiliate  of the formed,  surviving,
transferee  or lessee  corporation,  that issuer shall join in the  supplemental
agreement.

                    (ii) If this subsection (l) applies,  subsections  (a), (b),
(c), (d), (e) and (f) of this Section 6 do not apply.

               (m)  Company  Determination  Final.  Any  determination  that the
                    -----------------------------  
Company or the Board of Directors  must make  pursuant to  subsection  (a), (c),
(d), (e), (f), (g), (h) or (j) of this Section 6 may be challenged in good faith
by Warrantholders  that hold Warrants entitling them to purchase at least 50% of
the Warrant  Shares (the  "Majority  Warrantholders")  by providing  the Company
written  notice of such  challenge  within ten (10) business days of the Company
providing Warrantholders notice of such determination.  Any such challenge shall
be resolved by an investment banking firm selected by the Company and reasonably
acceptable to the Majority Warrantholders,  which resolution shall be conclusive
and binding on the Company and the Warrantholders.

               (n) When  Issuance  or Payment  May Be  Deferred.  In any case in
                   --------------------------------------------
which this Section 6 shall require that an  adjustment in the Exercise  Price be
made effective as of or immediately  after a record date for a specified  event,
the Company may elect to defer until the occurrence of such event (i) issuing to
the holder of any Warrant  exercised  after such record date the Warrant  Shares
and other capital stock of the Company, if any, issuable upon such exercise over
and above the Warrant  Shares and other  capital  stock of the Company,  if any,

<PAGE>

                                                             Page 40 of 45 Pages

issuable  upon such  exercise on the basis of the  Exercise  Price prior to such
adjustment  and (ii)  paying  to such  holder  any  amount  in cash in lieu of a
fractional share pursuant to Section 7.8 hereof; provided that the Company shall
deliver to such  holder a due bill or other  appropriate  instrument  evidencing
such holder's right to receive such  additional  Warrant  Shares,  other capital
stock and cash upon the occurrence of the event requiring such adjustment.

               (o) Adjustment in Number of Shares.  Upon each  adjustment of the
                   ------------------------------
Exercise  Price  pursuant  to this  Section  6, this  Warrant  shall  thereafter
evidence the right to receive upon payment of the adjusted  Exercise  Price that
number of shares of Common Stock (calculated to the nearest hundredth)  obtained
from the following formula:

               N'  =  N x  E
                           -
                           E'

               where:

               N' = the adjusted number of Warrant Shares issuable upon exercise
                    of a Warrant by payment of the adjusted Exercise Price.

               N =  the  number  of  Warrant  Shares  previously  issuable  upon
                    exercise of this  Warrant by payment of the  Exercise  Price
                    prior to adjustment.

               E' = the adjusted Exercise Price.

               E =  the Exercise Price prior to adjustment.

               (p)  Certificate as to  Adjustments.  Upon the occurrence of each
                    ------------------------------
adjustment or  readjustment  of the Exercise  Price or number of Warrant  Shares
issuable upon exercise  hereof  pursuant to this Section 6, the Company,  at its
expense,  shall promptly  compute such  adjustment or readjustment in accordance
with  the  terms  hereof  and  prepare  and  furnish  to  each  Warrantholder  a
certificate  prepared  by  the  Company  (or  by a firm  of  independent  public
accountants  of  recognized  standing  selected by the Board of Directors of the
Company (who may be the regular auditors of the Company) if such accountants are
required  to deliver a similar  certificate  pursuant  to Section  18(a) of that
certain  Warrant  Agreement dated as of June 30, 1995 by and between the Company
and IBJ Schroder  Bank & Trust  Company,  as Warrant  Agent)  setting forth such
adjustment  or  readjustment  and  showing  in  reasonable  detail the method of
calculation  and the facts upon which such  adjustment or readjustment is based.
The Company shall,  upon the written  request at any time of any  Warrantholder,
furnish or cause to be furnished to such holder a like certificate setting forth
(i) such  adjustment  and  readjustment,  (ii) the Exercise Price at the time in
effect,  and (iii) the number of shares of Common Stock and the amount,  if any,

<PAGE>


                                                             Page 41 of 45 Pages


of other  property which at the time would be received upon the exercise of this
Warrant.

       SECTION 7.     Miscellaneous.
                      -------------

          7.1 Entire  Agreement.  This Warrant  constitutes the entire agreement
              ----------------- 
between the  Company  and the  Warrantholder  with  respect to this  Warrant and
Warrant Shares.

          7.2 Binding Effects; Benefits. This Warrant shall inure to the benefit
              -------------------------
of and shall be binding  upon the  Company,  the  Warrantholder  and  holders of
Warrant Shares and their respective heirs, legal representatives, successors and
assigns. Nothing in this Warrant,  expressed or implied, is intended to or shall
confer on any person other than the Company,  the  Warrantholder  and holders of
Warrant Shares, or their respective heirs, legal representatives,  successors or
assigns, any rights, remedies,  obligations or liabilities under or by reason of
this Warrant or the Warrant Shares.

          7.3  Amendments  and  Waivers.  This  Warrant  may not be  modified or
               ------------------------
amended  except  by an  instrument  in  writing  signed by the  Company  and the
Majority  Warrantholders.  The Company,  any Warrantholder or holders of Warrant
Shares may, by an  instrument  in writing,  waive  compliance by the other party
with any term or  provision  of this  Warrant  on the part of such  other  party
hereto to be  performed  or  complied  with.  The  waiver by any such party of a
breach of any term or  provision  of this  Warrant  shall not be  construed as a
waiver of any subsequent breach.

          7.4  Section  and Other  Headings.  The  section  and  other  headings
               ----------------------------
contained  in this  Warrant  are for  reference  purposes  only and shall not be
deemed to be a part of this  Warrant or to affect the meaning or  interpretation
of this Warrant.

          7.5 Further  Assurances.  Each of the Company,  the Warrantholders and
              -------------------
holders of Warrant  Shares shall do and perform all such further acts and things
(including, without limitation, any required filings under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended) and execute and deliver all such
other certificates,  instruments and/or documents (including without limitation,
such proxies  and/or powers of attorney as may be necessary or  appropriate)  as
any party hereto may, at any time and from time to time,  reasonably  request in
connection with the performance of any of the provisions of this Warrant.

          7.6 Notices. All demands,  requests,  notices and other communications
              -------
required or  permitted  to be given under this  Warrant  shall be in writing and
shall be  deemed  to have been duly  given if  delivered  personally  or sent by
United States certified or registered first class mail, postage prepaid,  to the
parties hereto at the following  addresses or at such other address as any party
hereto shall hereafter specify by notice to the other party hereto:

<PAGE>

                                                             Page 42 of 45 Pages


                      if to the Company, addressed to:

                      Geotek Communications, Inc.
                      102 Chestnut Ridge Road
                      Montvale, New Jersey 07645
                      Attention:  President

                      if to any  Warrantholder  or  holder  of  Warrant  Shares,
       addressed  to the  address of such person  appearing  on the books of the
       Company.

               Except as otherwise provided herein, all such demands,  requests,
notices and other  communications  shall be deemed to have been  received on the
date of personal delivery thereof or on the third business day after the mailing
thereof.

          7.7  Separability.  Any term or  provision  of this  Warrant  which is
               ------------
invalid or unenforceable in any jurisdiction shall, as to such jurisdiction,  be
ineffective  to the  extent  of  such  invalidity  or  unenforceability  without
rendering  invalid or unenforceable  any other term or provision of this Warrant
or affecting the validity or enforceability of any of the terms or provisions of
this Warrant in any other jurisdiction.

          7.8  Fractional  Shares.  No fractional  shares or scrip  representing
               ------------------
fractional  shares  shall be issued  upon the  exercise  of this  Warrant.  With
respect to any  fraction of a share  called for upon any  exercise  hereof,  the
Company shall pay to the  Warrantholder an amount in cash equal to such fraction
multiplied  by the  current  market  price  (as  determined  as of the  date  of
exercise,  and with reference to the applicable  trading  market,  in accordance
with  Section  1.1(a)(ii))  of a share  of  such  stock  as of the  date of such
exercise.

          7.9 Rights of the  Holder.  The  Warrantholder  shall  not,  solely by
              ---------------------
virtue of this  Warrant,  be  entitled  to any  rights of a  stockholder  of the
Company, either at law or in equity.

          7.10 Governing Law; Jurisdiction.
               --------------------------- 

                    This  Warrant   shall  be  governed  by  and   construed  in
accordance  with  the laws of the  State of New  York,  without  regard  to such
State's internal conflicts of laws principles.

          (a)  Jurisdiction.  With  respect  to any suit,  action  or  preceding
               ------------
relating  to  this  Warrant,   the  Company   irrevocably  (i)  submits  to  the
non-exclusive jurisdiction of the courts in the State of New York and the United
States  District court located in the Borough of Manhattan in New York City; and
(ii) waives any  objection  which it may have at any time to the laying of venue
of any such suit,  action or  proceeding  brought in any such court,  waives any
claim  that  any  such  suit,  action  or  proceeding  has  been  brought  in an

<PAGE>


                                                             Page 43 of 45 Pages


inconvenient  forum and further  waives the right to object with  respect to any
such suit,  action or proceeding that such court does not have any  jurisdiction
over it.

          (b) Nothing  contained  in this Section 7.10 shall limit or impair the
right of a Warrantholder to institute any suit, action,  motion or proceeding in
any other  court of  competent  jurisdiction,  nor shall the taking of any suit,
action  or  proceeding  in one or more  jurisdictions  preclude  the  taking  of
proceedings in any other jurisdiction, whether concurrently or not.

          (c) Service of Process. The Company irrevocably appoints the following
              ------------------ 
process  agent to receive,  for it and on its behalf,  service of process in any
suit, action or proceeding relating to this Warrant: CT Corporation System, 1633
Broadway,  New York,  New York 10019.  If for any reason the  Company's  process
agent  is  unable  to  act  as  such,  the  Company  will  promptly  notify  the
Warrantholders  and within  thirty (30) days appoint a substitute  process agent
acceptable to the Majority Warrantholders. Nothing in this Agreement will affect
the right of a Warrantholder  to serve process in any other manner  permitted by
law.

IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its duly
authorized officer.


GEOTEK COMMUNICATIONS, INC.


By:_______________________________________
   Name:
   Title:

Dated: April 22, 1997

<PAGE>

                                                             Page 44 of 45 Pages


                                   ASSIGNMENT


(To be executed only upon assignment of Warrant Certificate)

               For value received,  ____________________  hereby sells,  assigns
and  transfers  unto   _____________________  the  within  Warrant  Certificate,
together with all right, title and interest therein, and does hereby irrevocably
constitute  and appoint  _________________  attorney,  to transfer  said Warrant
Certificate on the books of the within-named  Company with respect to the number
of Warrants set forth below, with full power of substitution in the premises:


               Name(s) of
               Assignee(s)          Address               No. of Warrant Shares
               -----------          -------               ---------------------








And if said number of Warrants shall not be all the Warrants  represented by the
Warrant  Certificate,  a new Warrant  Certificate is to be issued in the name of
said undersigned for the balance  remaining of the Warrants  represented by said
Warrant Certificate.

Dated: ________________, 19___




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

Note: The above signature should correspond exactly with the name on the face of
this Warrant Certificate.

<PAGE>

                                                             Page 45 of 45 Pages

                                SUBSCRIPTION FORM
                    (To be executed upon exercise of Warrant
                           pursuant to Section 1.1(a))

          The  undersigned  hereby  irrevocably  elects to exercise the right of
purchase  represented  by the within  Warrant  Certificate  for, and to purchase
thereunder,  shares of Common  Stock,  as provided  for  therein,  and  delivers
payment in full of the Exercise Price in the amount of $ __________ as follows:

               Cash                                       $
                                                           -------------
               Certified or Official bank check           $
                                                           -------------
                                                            


          Please issue a certificate  or  certificates  for such Common Stock in
the name of, and pay any cash for any fractional share to:


                          Name:  ______________________________________
                       Address:  ______________________________________
           Social Security No.:  ______________________________________
             (Please  Print  Name,   Address  and  Social Security No.)


Signature:
          ----------------------------------------

NOTE: The above signature should  correspond  exactly with the name on the first
page of this Warrant  Certificate or with the name of the assignee  appearing in
the assignment form delivered herewith.

And if said number of shares shall not be all the shares  purchasable  under the
within  Warrant  Certificate,  a new Warrant  Certificate is to be issued in the
name of said  undersigned  for the balance  remaining of the shares  purchasable
thereunder rounded up to the next higher number of shares.


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