EXHIBIT 10.63

                              EMPLOYMENT AGREEMENT

This Employment  Agreement (this "Agreement") is entered into as of September 1,
1998 (the "Effective Date"),  between Trimble  Navigation  Limited, a California
corporation (the "Company"), and Dr. Robert S. Cooper (the "Executive").

         WHEREAS,  the  Company  desires  to  employ  the  Executive  as of  the
Effective Date and the Executive  desires to accept  employment with the Company
on the terms and conditions set forth below;

         WHEREAS,  simultaneously  with the  execution  hereof,  the Company and
Consultant are entering a Standby Consulting  Agreement (the "Standby Consulting
Agreement");

         NOW,  THEREFORE,  in  consideration  of the  foregoing  recital and the
respective  covenants and agreements of the parties  contained in this document,
the Company and the Executive agree as follows:

         1. Employment and Duties.  During the Employment  Period (as defined in
Section 2 below),  the  Executive  will  serve as  Chairman  of the Board of the
Company which position will be deemed an executive officer position.  The duties
and   responsibilities   of  the   Executive   will   include   the  duties  and
responsibilities  for the  Executive's  corporate  offices and  positions as set
forth in the Company's  bylaws from time to time in effect and such other duties
and  responsibilities  as the board of  directors  of the Company (the "Board of
Directors")  may from time to time  reasonably  assign to the Executive,  in all
cases to be consistent with the Executive's corporate offices and positions. The
Executive will perform  faithfully the executive  duties  assigned to him to the
best of his ability and in the best  interests  of the Company.  Executive  will
continue to serve as a director of the Company without additional compensation.

         2.       Employment Period.

                  (a) Term. The employment  period will begin upon the Effective
Date and will  continue  thereafter  until  August  31,  1999  (the  "Employment
Period"), unless sooner terminated pursuant to the provisions of this Agreement.
Thereafter, Executive's employment will be at will.

                  (b)  Early   Termination.   The  Company  may   terminate  the
Executive's  employment prior to the end of the Employment  Period by giving the
Executive 30 days'  advance  notice in writing.  If the Company  terminates  the
Executive's  employment prior to the end of the Employment Period for any reason
other  than Cause or  Disability,  both as defined  below,  or if the  Executive
terminates his employment for Good Reason,  as defined below,  the provisions of
Sections  10(a)(i),  10(b) and 10(c) will apply. The Executive may terminate his
employment  prior to the end of the  Employment  Period by giving the Company 30
days' advance written notice.  If the Executive  terminates his employment prior
to the end of the Employment  Period other than for Good Reason,  the provisions
of Section 10(a)(ii) will apply. Upon termination of the Executive's  employment
with the Company, the Executive's rights under any applicable benefit plans will
be determined under the provisions of those plans.

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                  (c) Death.  The  Executive's  employment will terminate in the
event of his death.  The Company will have no  obligation  to pay or provide any
compensation  or benefits  under this  Agreement  on account of the  Executive's
death,  or for periods  following  the  Executive's  death,  provided,  that the
Company's obligations under Section 10(a)(i) will not be interrupted as a result
of the Executive's  death. The Executive's rights under the benefit plans of the
Company  in the event of the  Executive's  death  will be  determined  under the
provisions of those plans.

                  (d) Cause.  During the  Employment  Period,  the  Company  may
terminate the Executive's employment for cause by giving the Executive ten days'
advance notice in writing.  For all purposes under this Agreement,  "Cause" will
mean (i) willful  failure by the Executive to  substantially  perform his duties
hereunder,  (ii) a  willful  act by the  Executive  which  is  injurious  to the
Company, (iii) a willful breach by the Executive of a material provision of this
Agreement, or (iv) a material and willful violation of a federal or state law or
regulation applicable to the business of the Company. No act, or failure to act,
by the  Executive  will be  considered  "willful"  unless  committed  without  a
reasonable  belief that the act or omission was in the Company's  best interest.
No compensation or benefits will be paid or provided to the Executive under this
Agreement on account of a termination  for Cause,  or for periods  following the
date when such a termination of employment is effective.  The Executive's rights
under the benefit plans of the Company will be determined  under the  provisions
of those plans.

                  (e)  Disability.  The Company may  terminate  the  Executive's
employment  for  Disability by giving the  Executive 30 days' advance  notice in
writing. For all purposes under this Agreement,  "Disability" will mean that the
Executive, at the time notice is given, has been unable to substantially perform
his duties under this  Agreement  for a period of not less than two  consecutive
months as the result of his incapacity due to physical or mental illness. In the
event that the Executive  resumes the  performance of  substantially  all of his
duties  hereunder  before the  termination of his employment  under this Section
2(e) becomes  effective,  the notice of termination will automatically be deemed
to have been revoked.  No  compensation  or benefits will be paid or provided to
the Executive under this Agreement on account of termination for Disability,  or
for  periods  following  the date  when  such a  termination  of  employment  is
effective. The Executive's rights under the benefit plans of the Company will be
determined under the provisions of those plans.

                  (f) Good Reason.  Employment  with the Company may be regarded
as having been constructively  terminated by the Company,  and the Executive may
therefore terminate his employment for Good Reason and thereupon become entitled
to the benefits of Sections  10(a)(i) and 10(b) below, if, before the end of the
Employment  Period,  one or more of the following events will occur (unless such
event(s) applies generally to all senior management of the Company):

                           (i) a material  reduction by the Company in the 
Salary of the  Executive as in effect  immediately  prior to such reduction;

                           (ii) any  purported  termination  of the  Executive's
employment by the Company which is not effected for death, Disability or for 
Cause, or any purported termination for which the grounds relied upon are not 
valid; or

                           (iii)  the  failure  of the  Company  to  obtain  the
assumption of this Agreement or the Stock Option (as defined in Section 5) by 
any successor.

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         3. Place of Employment.  The Executive's  services will be performed at
the  Company's  principal  executive  offices at 585 N. Mary Avenue,  Sunnyvale,
California. The parties acknowledge, however, that the Executive may be required
to travel in connection with the performance of his duties hereunder.

         4. Salary. For all services to be rendered by the Executive pursuant to
this  Agreement,  the Company agrees to pay the Executive  during the Employment
Period a salary (the  "Salary") at a monthly rate of not less than $10,000.  The
Salary will be paid in periodic  installments  in accordance  with the Company's
regular payroll practices. The Company will be entitled to withhold, or cause to
be withheld,  from payment any amount of withholding  taxes required by law with
respect  to  payments  made to  Executive  in  connection  with  his  employment
hereunder.

         5.       Stock Option.

                  (a) Stock  Option.  Subject  to the  approval  of the Board of
Directors,  the Company will grant the  Executive a five year option (the "Stock
Option") to purchase  60,000 shares of the  Company's  Common Stock (the "Option
Shares")  at the fair  market  value of the Common  Stock of the  Company on the
Effective Date,  which is contingent upon a continuous  employment or consulting
relationship  between Executive and the Company.  Such fair market value will be
equal to the per share  closing  price  for the  Company's  Common  Stock on the
National Association of Securities Dealers,  National Market System on such date
of grant as recorded in The Wall Street  Journal.  The Stock Option will vest as
described in Section 5(b) and will be subject to such other terms and conditions
as are described in Section 5(c).

                  (b)  Vesting.   Option  Shares  will  vest  monthly  over  the
twelve-month  period  that begins as of the  Effective  Date and ends August 31,
1999.

                  (c) Option Provisions.  The Stock Option will be granted under
the 1993 Stock  Option Plan (the "Stock  Plan") and will be subject to the terms
and conditions of the Stock Plan and form of option agreement.

         6. Expenses.  The Executive will be entitled to prompt reimbursement by
the Company for all reasonable ordinary and necessary travel, entertainment, and
other  expenses  incurred  by the  Executive  during the  Employment  Period (in
accordance  with the policies and procedures  established by the Company for its
senior executive officers) in the performance of his duties and responsibilities
under this  Agreement;  provided,  that the Executive will properly  account for
such expenses in accordance with Company  policies and  procedures.  The parties
agree that for  purposes of this  Section,  the  Executive's  air travel will be
coach class domestically and business class internationally.

         7. Other Benefits.  During the Employment Period, the Executive will be
entitled to participate in employee benefit plans or programs of the Company, if
any, to the extent that his  position,  tenure,  salary,  age,  health and other
qualifications  make him  eligible  to  participate,  subject  to the  rules and
regulations applicable thereto.

         8.  Holidays.  The  Executive  will be entitled to Company  holidays in
accordance  with the  Company's  policies  in  effect  from time to time for its
senior executive officers.


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         9. Other Activities.  The Executive will devote approximately one third
of his working time and efforts  during the Company's  normal  business hours to
the business and affairs of the Company and its subsidiaries and to the diligent
and faithful performance of the duties and responsibilities duly assigned to him
pursuant to this  Agreement.  Executive will be free to commence and to continue
his other business  relationships without restriction other than with respect to
his duty of loyalty to the Company.

         10.  Termination  Benefits.  In the  event the  Executive's  employment
terminates prior to the end of the Employment Period, then the Executive will be
entitled to receive severance and other benefits as follows:

                  (a)      Severance.

                           (i) Involuntary  Termination.  If the Company  
terminates the Executive's  employment  other than for death, Disability or 
Cause,  or if the Executive  terminates  his  employment  for Good Reason,  
then,  in lieu of any  severance  benefits to which the  Executive  may 
otherwise be entitled under any Company severance plan or program, the Executive
will be entitled to payment of his Salary on the regular  payroll periods of the
Company until the end of the Employment Period or, if earlier, until a breach by
the Executive of his obligations under Sections 11 (Proprietary  Information) or
12 (Non-Solicit) hereof.

                           (ii)  Other  Termination.  In the event the 
Executive's  employment  terminates  for death,  Disability  or Cause,  or the 
Employee  resigns for other than Good Reason,  then the Executive will be  
entitled to receive  any  benefits  accrued to date only as may then be
established under the Company's  existing benefit plans and policies at the time
of such termination.  The Executive will receive only that compensation provided
for herein accrued for periods served prior to the termination of employment but
will not be entitled to any additional amounts under this Agreement.

                  (b)  Options.  In the  event  the  Executive's  employment  is
terminated  by the Company as  described  in Section  10(a)(i)  above,  then the
Executive  will  continue to vest in the  unvested  portion of the Stock  Option
until August 31, 1999 (subject to the term of the Stock  Option).  If terminated
as described in Section 10(a)(ii), such vesting will terminate as of the date of
such termination.

                  (c) No Duty to Mitigate. The Executive will not be required to
mitigate the amount of any payment  contemplated  by this Agreement  (whether by
seeking new employment or in any other manner).

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         11.   Proprietary   Information.   During  the  Employment  Period  and
thereafter,  the Executive  will not,  without the prior written  consent of the
Board of Directors, disclose or use for any purpose (except in the course of his
employment  under this  Agreement  and in  furtherance  of the  business  of the
Company or any of its affiliates or subsidiaries)  any confidential  information
or proprietary data of the Company.  As an express  condition of the Executive's
employment  with the Company,  the Executive  agrees to execute  confidentiality
agreements  as  requested  by the  Company,  including  but not  limited  to the
Company's form of Employment,  Confidential  Information,  Invention Assignment,
and  Arbitration   Agreement,   which  is  attached  hereto  as  Exhibit  A  and
incorporated herein by reference.

         12.  Non-Solicit.  The Executive  covenants and agrees with the Company
that during his employment  with the Company and for a period  expiring one year
after the date of termination of such employment, he will not solicit any of the
Company's  then-current employees to terminate their employment with the Company
or to become  employed by any firm,  company or other business  enterprise  with
which the Executive may then be connected.

         13. Right to Advice of Counsel. The Executive  acknowledges that he has
had the  opportunity  to fully review this  Agreement  and if he so chooses,  to
consult with counsel and is fully aware of his rights and obligations under this
Agreement.

         14. Successors.  The Company will require any successor (whether direct
or  indirect,  by  purchase,  merger,  consolidation  or  otherwise)  to  all or
substantially  all of the  business  and/or  assets of the Company to assume the
obligations of this Agreement in the same manner and to the same extent that the
Company would be required to perform it if no such  succession  had taken place.
Failure  of the  Company  to  obtain  such  assumption  agreement  prior  to the
effectiveness  of any such succession will entitle the Executive to the benefits
described in Sections 10(a)(i) and 10(b) of this Agreement, subject to the terms
and conditions therein.

         15.      Arbitration.

                  (a) Disputes.  Except as provided in Section 15(d) below,  the
Company and the Executive agree that, to the extent permitted by applicable law,
any dispute or  controversy  arising under or in connection  with this Agreement
will  be  settled  exclusively  by  arbitration  in  San  Jose,  California,  in
accordance with the rules of the American Arbitration Association then in effect
by an arbitrator selected by both parties within ten days after either party has
notified  the other in  writing  that it  desires a dispute  between  them to be
settled by arbitration. In the event the parties cannot agree on such arbitrator
within such ten-day period,  each party will select an arbitrator and inform the
other party in writing of such  arbitrator's  name and address  within five days
after the end of such ten-day  period and the two  arbitrators  so selected will
select a third arbitrator within 15 days thereafter;  provided, however, that in
the event of a failure by either  party to select an  arbitrator  and notify the
other  party of such  selection  within  the time  period  provided  above,  the
arbitrator  selected  by the  other  party  will be the sole  arbitrator  of the
dispute.  The  decision  of  the  arbitrator  or a  majority  of  the  panel  of
arbitrators  will be binding  upon the parties and judgment in  accordance  with
that  decision  may be  entered  in any  court  having  jurisdiction  thereover.
Punitive damages will not be awarded.

                  (b) Consent to Personal  Jurisdiction.  The arbitrator(s) will
apply California law to the merits of any dispute or claim, without reference to
conflicts of law rules.  Executive hereby consents to the personal  jurisdiction
of the  state  and  federal  courts  located  in  California  for any  action or
proceeding  arising  from or  relating  to this  Agreement  or  relating  to any
arbitration in which the parties are participants.


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                  (c)  Equitable  Relief.  The parties may apply to any court of
competent   jurisdiction  for  a  temporary   restraining   order,   preliminary
injunction,  or other interim or  conservatory  relief,  as  necessary,  without
breach of this arbitration agreement and without abridgment of the powers of the
arbitrator.

                  (d)  Acknowledgment.  EXECUTIVE HAS READ AND UNDERSTANDS  THIS
AGREEMENT,  WHICH DISCUSSES  ARBITRATION.  EXECUTIVE UNDERSTANDS THAT BY SIGNING
THIS AGREEMENT,  EXECUTIVE  AGREES TO SUBMIT ANY CLAIMS ARISING OUT OF, RELATING
TO, OR IN  CONNECTION  WITH THIS  AGREEMENT,  OR THE  INTERPRETATION,  VALIDITY,
CONSTRUCTION,   PERFORMANCE,   BREACH  OR   TERMINATION   THEREOF,   TO  BINDING
ARBITRATION,  EXCEPT AS PROVIDED  IN SECTION  15(c),  AND THAT THIS  ARBITRATION
CLAUSE  CONSTITUTES A WAIVER OF EXECUTIVE'S RIGHT TO A JURY TRIAL AND RELATES TO
THE  RESOLUTION  OF ALL  DISPUTES  RELATING TO ALL  ASPECTS OF THE  RELATIONSHIP
BETWEEN THE PARTIES.

         16. Absence of Conflict. The Executive represents and warrants that his
employment  by the Company as described  herein will not conflict  with and will
not be constrained by any prior or other  employment or consulting  agreement or
relationship.

         17. Assignment. This Agreement and all rights under this Agreement will
be binding  upon and inure to the benefit of and be  enforceable  by the parties
hereto  and  their  respective  personal  or legal  representatives,  executors,
administrators, heirs, distributees, devisees, legatees, successors and assigns.
This  Agreement  is  personal  in nature,  and  neither  of the  parties to this
Agreement  will,  without the written  consent of the other,  assign or transfer
this  Agreement  or any right or  obligation  under this  Agreement to any other
person or entity;  except that the rights and  obligations  of the Company under
this  Agreement may be assigned to a corporation  which becomes the successor to
the Company as the result of a merger or other corporate  reorganization or sale
of substantially all the assets to a corporation which continues the business of
the  Company  or any  other  subsidiary  of the  Company,  provided,  that  such
assignment  will not relieve the Company of its  obligations  hereunder.  If the
Executive  should  die while any  amounts  are still  payable  to the  Executive
hereunder,  all such amounts,  unless otherwise provided herein, will be paid in
accordance with the terms of this Agreement to the Executive's devisee, legatee,
or other designee or, if there be no such designee, to the Executive's estate.

         18.  Notices.  For  purposes  of  this  Agreement,  notices  and  other
communications  provided  for in this  Agreement  will be in writing and will be
delivered  personally or sent by United States  certified  mail,  return receipt
requested, postage prepaid, addressed as follows:


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                  If to the Company:   Trimble Navigation Limited
                                       585 N. Mary Avenue
                                       P.O. Box 3642
                                       Sunnyvale, CA  94088-3642
                                       Attn: Board of Directors

or to such other  address or the attention of such other person as the recipient
party has previously  furnished to the other party in writing in accordance with
this  Section.  Such  notices or other  communications  will be  effective  upon
delivery  or, if  earlier,  three days after they have been  mailed as  provided
above.

         19.  Integration.  This Agreement and the Standby Consulting  Agreement
represent the entire agreement and  understanding  between the parties as to the
subject  matter  hereof and supersede all prior  agreements  whether  written or
oral. No waiver,  alteration,  or  modification of any of the provisions of this
Agreement will be binding unless in writing and signed by the party against whom
enforcement of the change or modification is sought.

         20.  Waiver.  Failure  or delay on the part of either  party  hereto to
enforce  any  right,  power,  or  privilege  hereunder  will  not be  deemed  to
constitute a waiver thereof.  Additionally, a waiver by either party or a breach
of any promise  hereof by the other party will not operate as or be construed to
constitute a waiver of any subsequent waiver by such other party.

         21. Severability.  Whenever possible,  each provision of this Agreement
will be interpreted in such manner as to be effective and valid under applicable
law, but if any  provision of this  Agreement is held to be invalid,  illegal or
unenforceable   in  any  respect  under  any  applicable  law  or  rule  in  any
jurisdiction,  such invalidity,  illegality or unenforceability  will not affect
any  other  provision  or any other  jurisdiction,  but this  Agreement  will be
reformed,  construed  and  enforced  in such  jurisdiction  as if such  invalid,
illegal or unenforceable provision had never been contained herein.

         22. Applicable Law. This Agreement will be governed by and construed in
accordance with the internal  substantive laws, and not the choice of law rules,
of the State of California.

         23. Counterparts.  This Agreement may be executed in counterparts, each
of which will be deemed to be an original,  and which together will constitute a
single agreement.


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         IN WITNESS WHEREOF, each of the parties has executed this Agreement, in
the case of the Company by its duly authorized  officer,  as of the day and year
first above written.


EXECUTIVE:                               TRIMBLE NAVIGATION LIMITED:

/s/ Robert S. Cooper                     By: /s/ Bradford W. Parkinson
Dr. Robert S. Cooper
                                         Name: Bradford W. Parkinson

                                         Title: President


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