UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                         (Amendment No. ______________)*

 
                           TRIMBLE NAVIGATION LIMITED
                           --------------------------
                                (Name of Issuer)
                              
                                  COMMON STOCK
                         ------------------------------
                         (Title of Class of Securities)

 
                                   896239 10 0
                                 --------------
                                 (CUSIP Number)

                                    01/01/99
              -----------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed: 

    [  ] Rule 13d-1(b) 
    [  ] Rule 13d-1(c) 
    [  ] Rule 13d-1(d)

     *The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The  information  required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of  Section 18 of the  Securities  Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).


     Potential  persons  who are to respond  to the  collection  of  information
contained  in this form are not required to respond  unless the form  displays a
currently valid OMB control number.

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<PAGE>

     
          CUSIP No. 896239 10 0

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

 
     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).
          
          Charles Robert Trimble             SSN: 558-60-0206
- --------------------------------------------------------------------------------

     2.   Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)[  ]

          (b)[  ]
- --------------------------------------------------------------------------------

     3.   SEC Use Only
- --------------------------------------------------------------------------------

     4.   Citizenship or Place of Organization    U.S.A
- --------------------------------------------------------------------------------

Number of            5.   Sole Voting Power.................. 1,569,458
Shares Bene-
ficially             6.   Shared Voting Power................ None
Owned by Each
Reporting            7.   Sole Dispositive Power............. 1,569,458
Person With:
                     8.   Shared Dispositive Power........... None

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

     9.   Aggregate Amount Beneficially Owned by Each Reporting Person 

                                1,569,458 SHARES
- --------------------------------------------------------------------------------
     10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares 
          (See Instructions)

                                 Not applicable
- --------------------------------------------------------------------------------
     11.  Percent of Class Represented by Amount in Row (9)

                                      7.12%
- --------------------------------------------------------------------------------

     12.  Type of Reporting Person (See Instructions)  

                                       IN
- --------------------------------------------------------------------------------


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<PAGE>


Item 1.
       (a)  Name of Issuer : 

            Trimble Navigation Limited

       (b)  Address of Issuers Principal Executive Offices :

            585 N. Mary Avenue
            Sunnyvale, CA. 94086

Item 2.
       (a)  Name of Person Filing :     
          
            Charles Robert Trimble

       (b)  Address of Principal Business Office or, if none, Residence : 
               
            Same As Above
                                                                           
       (c)  Citizenship: 

            U.S.a.

       (d)  Title of Class of Securities: 
          
            Common

       (e)  CUSIP Number : 

            896239 10 0

Item 3.  If this statement is filed pursuant to Section 240.13d-1(b) or 
         240.13d-2(b) or (c), check whether the person filing is a:
       
         Not applicable

Item 4.   Ownership

     Provide  the  following  information  regarding  the  aggregate  number and
percentage of the class of securities of the issuer identified in Item 1.

       (a)  Amount of beneficially owed:                         1,569,458  
                
       (b)  Percent of class:                                        7.12%
          
       (c)  Number of shares as to which the person has:
            (i)   Sole power to vote or to direct the vote:       1,569,458

            (ii)  Shared power to vote or to direct the vote:     None

            (iii) Sole power to dispose or to direct the 
                  disposition of:                                 1,569,458

            (iv)  Shared power to dispose or to direct the disposition of: None

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<PAGE>

Item 5.  Ownership  of Five  Percent or Less of Class 

     If this  statement  is being  filed to report  the fact that as of the date
hereof the reporting  person has ceased to be the beneficial  owner of more than
five percent of the class of securities, check the following [ ]

Item 6.   Ownership of More than Five Percent on Behalf of Another Person

          Not applicable
     
Item 7.   Identification  and  Classification  of the  Subsidiary  Which  
          Acquired the Security Being Reported on By the Parent Holding Company

          Not applicable

Item 8.   Identification and Classification of Members of the Group

          Not applicable

Item 9.   Notice of Dissolution of Group

          Not applicable

Item 10.  Certification
          
          Not applicable
                

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<PAGE>


                                    SIGNATURE

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

 
                                                           
                    Date : February 9, 1999

                                             
                   Signature /s/Charles R. Trimble
                    
                   Name/Title : Charles R. Trimble
                                Vice Chariman Board of Directors


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