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

                                    FORM 10-Q

                 [X] QUARTERLY REPORT UNDER SECTION 13 OR 15 (d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                For the quarterly period ended September 30, 1997

                                       OR

             [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                    For the transition period from____to____

                         Commission File Number 0-18645

                           TRIMBLE NAVIGATION LIMITED
             (Exact name of registrant as specified in its charter)

             California                                94-2802192
 (State or other jurisdiction of                    (I.R.S. Employer
  incorporation or organization)                     identification No.)

  645 North Mary Avenue, Sunnyvale, California              94088
   (Address of Principal Executive Offices)               (Zip Code)

                                 (408) 481-8000
              (Registrant's telephone number, including area code)

                                 Not Applicable
             (Former name, former address and former fiscal year, if
                           changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such shorter  periods that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.
                  Yes      X                No

As of September 30, 1997,  there were 22,565,900  shares of Common Stock (no par
value) outstanding.


                                       1



                           TRIMBLE NAVIGATION LIMITED

This report contains  forward-looking  statements  within the meaning of Section
27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act
of 1934.  Actual  results could differ  materially  from those  indicated in the
forward-looking  statements  as a result of the risk  factors  set forth in this
report. The Company has attempted to identify forward-looking statements in this
report  by  placing  an  asterisk  (*) in the  left-hand  margin  of  paragraphs
containing those statements.


                                      INDEX
                                                                          Page
PART I.         FINANCIAL INFORMATION                                    Number


   Item 1.           Financial Statements

                     Condensed Consolidated Balance Sheets -
                     September 30, 1997 and December 31, 1996               3

                     Condensed Consolidated Statements of Operations -
                     Three and Nine Months ended September 30, 1997
                     and 1996                                               4

                     Condensed Consolidated Statements of Cash Flows -
                     Nine Months ended September 30, 1997 and 1996          5

                     Notes to Condensed Consolidated Financial
                     Statements                                             6

   Item 2.           Management's Discussion and Analysis of Financial
                     Condition and Results of Operations                    9


PART II. OTHER INFORMATION


   Item 6.           Exhibits and Reports on Form 8-K                      18


SIGNATURES                                                                 19


                                       2



   PART I. FINANCIAL INFORMATION
   Item 1. Financial Statements

                           TRIMBLE NAVIGATION LIMITED
                      CONDENSED CONSOLIDATED BALANCE SHEETS

                                                 September 30,    December 31,
                                                      1997              1996
- -------------------------------------------------------------------------------
 (In thousands)                                   (Unaudited)
  ASSETS
  Current assets:
    Cash and cash equivalents                    $    26,771        $    22,671
    Short term investments                            52,884             59,867
    Accounts and other receivable, net                36,512             34,374
    Inventories                                       47,461             38,858
    Other current assets                               6,061              3,633
                                                -------------     --------------
     Total current assets                            169,689            159,403

    Net property and equipment                        21,955             21,504
    Intangible assets                                  4,007              4,493
    Deferred income taxes                                344                383
    Other assets                                       5,145              4,058
                                                --------------    --------------
      Total assets                               $   201,140        $   189,841
                                                ==============    ==============

 LIABILITIES AND SHAREHOLDERS' EQUITY
 Current liabilities:
   Current portion of long-term debt             $        10              $ 316
   Accounts payable                                   16,162             13,763
   Accrued compensation and benefits                   7,924              6,552
   Customer advances                                     378              3,000
   Accrued liabilities                                 8,991             10,358
   Income taxes payable                                2,352                869
                                                --------------    --------------
     Total current liabilities                        35,817             34,858
                                                --------------    --------------

   Noncurrent portion of long-term debt 
    and other liabilities                             30,744             30,938
                                                --------------    --------------
     Total liabilities                                66,561             65,796
                                                --------------    --------------

 Shareholders' equity:
   Common stock                                      129,682            125,535
   Common stock warrants                                 700                700
   Retained earnings (accumulated deficit)             4,283             (2,603)
   Unrealized gain on short term investments              76                 20
   Foreign currency translation adjustment              (162)               393
                                                --------------    --------------
     Total shareholders' equity                      134,579            124,045
                                                --------------    --------------
     Total liabilities and shareholders' equity  $   201,140       $    189,841
                                                ==============   ===============


See accompanying notes to condensed consolidated financial statements.


                                       3



                           TRIMBLE NAVIGATION LIMITED
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)

 

                                                       Three Months Ended                        Nine Months Ended
                                                       September 30,                            September 30,
                                             -----------------------------------    ---------------------------------------
                                                  1997               1996                 1997                 1996
- ---------------------------------------------------------------------------------------------------------------------------
(In thousands, except per share data)
                                                                                                          

 Total revenue                                      $ 64,719           $ 54,086             $ 194,214            $ 169,410
                                             ----------------   ----------------    ------------------  -------------------

 Operating expenses:
     Cost of sales                                    30,520             27,457 #              91,820               80,506 #
     Research and development                          9,910              9,882                29,024               27,851
     Sales and marketing                              15,145             16,559                44,409               49,472
     General and administrative                        7,571              6,608                21,283               23,075
     Restructuring charges                                 -              2,046                     -                2,046
                                             ----------------   ----------------    ------------------  -------------------
                                                      63,146             62,552               186,536              182,950
                                             ----------------   ----------------    ------------------  -------------------

 Operating income (loss)                               1,573             (8,466)                7,678              (13,540)
                                             ----------------   ----------------    ------------------  -------------------

 Nonoperating income (expense):
     Interest income                                   1,152              1,101                 3,294                3,498
     Interest and other expenses                        (816)            (1,089)               (2,600)              (2,984)
     Foreign exchange gain (loss)                         81                 20                   235                  (73)
                                             ----------------   ----------------    ------------------  -------------------
                                                         417                 32                   929                  441
                                             ----------------   ----------------    ------------------  -------------------

 Income (loss) before income taxes                     1,990             (8,434)                8,607              (13,099)
 Income tax provision (benefit)                          398                400                 1,721                 (534)
                                             ----------------   ----------------    ------------------  -------------------

 Net income (loss)                                   $ 1,592           $ (8,834)              $ 6,886            $ (12,565)
                                             ================   ================    ==================  ===================

 Net income (loss) per share                          $ 0.07            $ (0.40)               $ 0.30              $ (0.58)
                                             ================   ================    ==================  ===================

 Weighted average common and dilutive common
     equivalent shares                                23,163             22,029                22,684               21,833
                                             ================   ================    ==================  ===================



#    Included in cost of sales for the three and nine months  ended  
     September 30, 1996, are charges totaling $2.175 million related to
     inventory write-downs



See accompanying notes to condensed consolidated  financial statements. 


                                       4


                           TRIMBLE NAVIGATION LIMITED
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)



                                                                    Nine Months Ended
                                                                      September 30,
                                                                 1997                1996
- ------------------------------------------------------------------------------------------------
(In thousands)
                                                                                      
 
 Net cash provided (used) by operating activities                   $ 4,484            $ (6,827)
                                                           -----------------   -----------------

 Cash flow from investing activities:
      Purchase of short term investments                            (57,400)            (59,338)
      Maturities of short term investments                           42,575              54,049
      Sales of short term investments                                21,808              15,212
      Equity investments                                               (886)             (1,330)
      Acquisition of property and equipment                          (8,242)             (8,565)
      Capitalized patent expenditures                                  (642)               (569)
                                                           -----------------   -----------------
        Net cash provided (used)  in investing activities            (2,787)               (541)
                                                           -----------------   -----------------

 Cash flow from financing activities:
      Issuance of common stock                                        5,981               3,364
      Repurchase of common stock                                     (1,834)               (799)
      Collection (payment) of notes receivable                       (1,507)                 48
      Payments on long-term debt and revolving
        credit facilities                                              (237)             (1,303)
                                                           -----------------   -----------------
        Net cash provided by financing activities                     2,403               1,310
                                                           -----------------   -----------------

 Net increase (decrease) in cash and cash equivalents                 4,100              (6,058)

 Cash and cash equivalents -- beginning of period                    22,671              29,711
                                                           -----------------   -----------------
 Cash and cash equivalents -- end of period                        $ 26,771            $ 23,653
                                                           =================   =================

 Supplemental disclosures of cash flow information:
      Cash paid (received) during the period for:
        Interest                                                      $ 746               $ 808
        Income taxes (benefit), net of refunds                        $ 271               $ 487

 Supplemental other non-cash investing and financing activities:
       Common stock issued in connection with acquisiton of
       Terra Corporation                                               $ -             $ 2,857


 See accompanying notes to condensed consolidated financial statements.

                                       5




                           TRIMBLE NAVIGATION LIMITED
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1 - Basis of Presentation:

The condensed  consolidated  financial  statements  for the three and nine month
periods ended September 30, 1997, and 1996 presented in this Quarterly Report on
Form 10-Q are  unaudited.  The balance  sheet at  December  31,  1996,  has been
derived from the audited financial  statements at that date but does not include
all of the information and footnotes required by generally  accepted  accounting
principles  for complete  financial  statements.  In the opinion of  management,
these  statements  include all adjustments  (consisting only of normal recurring
adjustments)  necessary  for a fair  statement  of the  results  for the interim
periods presented.  The condensed  consolidated  financial  statements should be
read in conjunction with the audited consolidated financial statements and notes
thereto  included in the Company's  Annual Report to  Shareholders  for the year
ended December 31, 1996.

The results of operations  for the three and nine month periods ended  September
30, 1997 are not necessarily  indicative of the results that may be expected for
the year ending December 31, 1997.


NOTE 2 - Inventories:

Inventories consist of the following:


                                September 30,           December 31,
                                    1997                    1996
- ----------------------------------------------------------------------
(In thousands)

Raw materials                      $ 29,202                  $ 24,145
Work-in-process                       7,272                     5,174
Finished goods                       10,987                     9,539
                             ---------------      --------------------
                                   $ 47,461                  $ 38,858
                             ---------------      --------------------


                                       6




NOTE 3 - New Accounting Standards:

* In February 1997, the Financial  Accounting  Standards Board issued  Statement
No. 128,  "Earnings Per Share",  which is required to be adopted on December 31,
1997. At that time, the Company will be required to change the method  currently
used to compute  earnings per share and to restate all prior periods.  Under the
new requirements for calculating primary earnings per share, the dilutive effect
of  stock  options  will  be  excluded.  The  impact  of  Statement  128  on the
calculation  of primary and fully  diluted  earnings  per share for the quarters
reported is not expected to be material.

NOTE 4 - Restructuring Charge:

During  the  quarter  ended   September  30,  1996,   the  Company   recorded  a
restructuring  charge of $2,046,000.  Components of this  restructuring  reserve
included employee severance packages,  the cost of redundant office space, write
downs of idle assets and the costs of moving people.

NOTE 5 - Contingencies:

Shareholder Litigation

On December 6, 1995, two  shareholders  filed a class action lawsuit against the
Company and certain  directors  and officers of the Company.  Subsequent to that
date,  additional lawsuits were filed by other  shareholders.  The lawsuits were
subsequently  amended and  consolidated  into one  complaint  which was filed on
April 5, 1996. The amended consolidated complaint sought to bring an action as a
class action  consisting  of all persons who  purchased  the common stock of the
Company during the period April 18, 1995,  through  December 5, 1995 (the "Class
Period").  The  plaintiffs  alleged  that the  defendants  sought to induce  the
members of the Class to purchase  the  Company's  common  stock during the Class
Period at  artificially  inflated  prices.  The  plaintiffs  seek  recissory  or
compensatory  damages with interest  thereon,  as well as reasonable  attorneys'
fees and extraordinary  equitable and/or injunctive  relief. The Company filed a
motion to dismiss,  which was heard by the Court on August 16,  1996.  The court
rejected  the  plaintiffs'  lawsuit,  but allowed  thirty  days to resubmit  its
complaint.  On September 24, 1996, the plaintiffs filed an amended complaint. On
April 28, 1997,  the Court  granted in part,  and denied in part,  the Company's
motion to dismiss.  The Court further  granted the  plaintiffs  leave to replead
certain  dismissed claims. On June 19, 1997 the plaintiffs filed a third amended
and consolidated complaint.  The Company has filed a motion to dismiss which was
heard by the Court on October 24, 1997.  The Company does not believe that it is
possible to predict the outcome of this litigation.

Other Litigation

In October 1995,  an employee who was  terminated by the Company in 1992 filed a
Complaint  against  the  Company,  alleging  that his  incentive  stock  options
continued  to  vest  subsequent  to  his  termination.   He  sought  damages  of
approximately  $1,000,000.  The Company filed a general  denial in answer to the
Complaint.  The trial was  concluded on September 25 ,1997 and the jury rendered


                                       7


its verdict in favor of the Company on all causes of action. The judgment is not
yet final because the period for appeal has not yet passed. The Company does not
believe that an appeal, if any, would be successful.

In September 1996, the British Technology Group ("BTG") brought suit for alleged
infringement  of its  RE.34,004  patent.  BTG has also  brought suit against two
other  defendants over the same patent.  Trimble  terminated its litigation with
BTG over U.S.  Patent RE.  34,004  ("004  patent).  After a series of  pre-trial
rulings  favorable  to  Trimble,  BTG  agreed  to  dismiss  its  complaint  with
prejudice.  BTG also agreed to release Trimble's receiver  architecture that was
the  subject  matter of the lawsuit  from  liability  with  respect to any other
infringement  allegations  that BTG might  have made in a  lawsuit.  In  return,
Trimble agreed to dismiss its  counterclaim  against BTG. The agreement does not
require either party to pay any money to the other and each party is to bear its
own costs.  An order  dismissing  BTG's case against Trimble has been entered by
Judge Bartle of the federal court of Philadelphia.

NOTE  6 - Line of Credit

In August  1997,  the Company  entered into a three year  $50,000,000  unsecured
revolving  credit  facility  with four  banks  (the  "Credit  Agreement").  This
facility  replaced  the previous two year  $30,000,000  unsecured  line that was
expiring.  The Credit Agreement  enables the Company to borrow up to $50,000,000
provided that certain  financial and other  covenants are met.  Under a separate
agreement the Company has an additional  $5,000,000 line of credit provided only
by the lead bank for "Letter of Credit"  purposes  which is also  subject to the
covenants in the main facility.  The Credit Agreement  provides for payment of a
commitment  fee of 0.25% and borrowings to bear interest at 1% over LIBOR if the
total  funded  debt to  EBITDA  is less  than or equal to 1.00  times,  0.3% and
borrowings  to bear  interest  at 1.25% over LIBOR if the ratio is greater  than
1.00 times and less than or equal to 2.00 times,  or 0.4% and borrowings to bear
interest  at 1.75%  over  LIBOR if the  ratio is  greater  than 2.00  times.  In
addition to  borrowing  at the LIBOR  rate,  the Company has the right to borrow
with  interest at the higher of (i) one of the bank's annual prime rate and (ii)
the federal funds rate plus 0.5%.  To date,  no borrowings  have been made under
the line. In addition, the Company is restricted from paying dividends under the
terms of the Credit Agreement.



                                       8



Item 2.                  MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                      FINANCIAL CONDITION AND RESULTS OF OPERATIONS



RESULTS OF OPERATIONS


Revenues

Revenues for the three month and nine month  periods  ended  September 30, 1997,
were  $64,719,000 and $194,214,000 as compared with $54,086,000 and $169,410,000
in the  corresponding  1996  periods.  The table below breaks out the  Company's
revenues by business unit:




                                            Three Months Ended September 30,                 Nine Months Ended September 30,
                                      -----------------------------------------------     --------------------------------------

                                            1997             1996      Increase           1997              1996       Increase
- --------------------------------------------------------------------------------------------------------------------------------
(In thousands)
                                                                                                          
   
   Commercial Systems                    $ 39,143         $ 35,528          10%        $ 122,305         $ 116,107            5%
   Software & Component Technologies       12,535            9,331          34%           34,321            27,822           23%
   Aerospace                               13,041            9,227          41%           37,588            25,481           48%
                                      ------------  ---------------   ---------     -------------  ----------------  -----------
 Total                                   $ 64,719         $ 54,086          20%        $ 194,214         $ 169,410           15%
                                      ------------  ---------------   ---------     -------------  ----------------  -----------


Commercial Systems

Commercial  Systems  revenues for the three month and nine month  periods  ended
September 30, 1997 increased in total over the prior year period. In Land Survey
sales  decreased in the third quarter of 1997,  compared to the third quarter of
1996,  are due in part to the  continued  slow down of the European and Japanese
economies.  Also, new product introductions for Land Survey occurred late in the
third quarter of 1997,  therefore,  certain customers held off on placing orders
until the new product introduction.

The decrease in Land Survey sales were offset by an increase in revenues for the
third  quarter of 1997,  as compared to the third  quarter of 1996,  in the GIS,
Precise Positioning, and Tracking vertical markets.

Tracking  revenues  have  increased in the third quarter of 1997 compared to the
third  quarter  of 1996 due to the  resumption  of  shipments  in March  1997 to
American  Mobile  Satellite  Corporation  (AMSC),  a  company  based in  Reston,
Virginia, that provides a variety of voice and data services via satellite.  The
shipments were originally discontinued late in the fourth quarter of 1995 at the


                                       9


request of AMSC,  in part due to delays in AMSC's  completion  of  software.  On
February 20, 1997,  an agreement was signed  between  Trimble and AMSC to resume
shipments of Trimble's  Galaxy/GPS terminals at the rate of 500 units per month,
beginning in March 1997.  On August 28, 1997 an  amendment to the February  1997
agreement  was signed to reduce the number of units  shipped  per month from 500
units to 250 units per month.  Approximately  1,250 and 3,250 units were shipped
in the three and nine month periods ending September 30, 1997, respectively.

Software and Component Technologies

Software and Component  Technologies  revenues  increased for the three and nine
month  periods ended  September  30, 1997,  as compared  with the  corresponding
periods for 1996 due  primarily  to the Company  receiving  $1.8  million from a
development  agreement in connection  with an  irrevocable  non  refundable  non
recurring  engineering  fee  recorded  in the third  quarter  of 1997 and a $2.2
million  technology  license from Pioneer  Electronic  Corporation in connection
with  the  expansion  of  the  original  1992  licensee  for  in-car  navigation
technology recorded in the second quarter of 1997.

Aerospace

* Sales of Aerospace  products  increased  for the three and nine month  periods
ending September 30, 1997, compared to the same periods in 1996 primarily due to
the continued increase in sales of the HT 9100,  Honeywell Trimble product line.
The  Company  considers  its  Aerospace  products  to  be  a  long  term  growth
opportunity.  It believes  that success in this area will be dependent  upon the
success of the current strategic alliance with Honeywell.

* Military sales  increased  slightly in the third quarter of 1997,  compared to
the third quarter of 1996. Military sales are highly dependent on contracts that
are subject to government approval and are,  therefore,  expected to continue to
fluctuate from period to period. The Company believes that opportunities in this
market have been substantially  reduced by cutbacks in U.S. and foreign military
spending.



                                       10



Revenue third quarter compared to second quarter

Revenues for the three month periods ended September 30, 1997 and June 30, 1997,
were  $64,719,000  and $68,944,00  respectively.  The table below breaks out the
Company's revenues by business unit for the three month periods:



                                                Three Months Ended
                                   ---------------------------------------------
                                    September 30,       June 30,       Increase/
                                         1997              1997       (Decrease)
- --------------------------------------------------------------------------------
(In thousands)

 Commercial Systems                   $ 39,143         $ 45,042          (13)%
 Software & Component Technologies      12,535           12,209             3%
 Aerospace                              13,041           11,693            12%
                                  ------------    -------------  --------------
 Total                                $ 64,719         $ 68,944           (6)%
                                  ------------    -------------  --------------

Commercial Systems

Commercial  Systems revenues  decreased between the second and third quarters of
1997  primarily  in  the  Land  Survey   vertical  market  due  to  new  product
introductions  which  occurred  late in the third  quarter  of 1997,  therefore,
certain customers held off on placing orders until the new product introduction.

The decrease in Land Survey sales were offset by an increase in revenues for the
third  quarter of 1997,  as compared to the second  quarter of 1997, in the GIS,
and Precise Positioning vertical markets.

Software and Component Technologies

Software and Component  Technologies  slight  increase from the third quarter of
1997,  as  compared to the second  quarter of 1997 was due to slightly  stronger
demand of Software and Component Technologies products.

Aerospace

Aerospace  increase in revenues  from the third  quarter of 1997, as compared to
the second  quarter of 1997 is primarily due to stronger  demand of the HT 9100,
Honeywell Trimble product line.


                                       11



Revenue outside the US

* Sales to  unaffiliated  customers  in  locations  outside  the U.S.  comprised
approximately  43% and 46% of revenue in the first nine months of 1997 and 1996,
respectively.  During the first nine  months of 1997,  the  Company  experienced
lower revenues in Europe in many product lines,  and in Japan primarily  related
to surveying  products.  The Company  anticipates  that export revenue and sales
made by its subsidiaries in locations  outside the U.S. will continue to account
for a significant portion of its revenue and, therefore,  the Company is subject
to the risks inherent in these sales, including unexpected changes in regulatory
requirements,  exchange rates, governmental approval, tariffs or other barriers.
Even  though the U.S.  Government  announced  on March 29,  1996,  that it would
support and maintain the GPS system,  as well as eliminate  the use of Selective
Availability  (S/A) (a method of degrading GPS  accuracy),  customers in certain
foreign  markets may be reluctant to purchase  products  based on GPS technology
given the  control  of GPS by the U.S.  Government.  The  Company's  results  of
operations could be adversely affected if the Company were unable to continue to
generate significant sales in locations outside the U.S.


Gross Margin

* Gross margin varies on a quarterly basis due to a number of factors, including
product mix,  technology  license fees,  domestic  versus  international  sales,
customer type, the effects of production volumes and fixed  manufacturing  costs
on unit  product  costs  and new  product  start-up  costs.  Gross  margin  as a
percentage  of total  product  revenue was 53% for both the three and nine month
periods  ended  September  30,  1997,  as  compared  with  49%  and  52%  in the
corresponding 1996 periods.  The 1997 margins have been enhanced by the positive
impact of non-product revenues recognized from non-recurring engineering fees of
$1.8 million in the third quarter and from Pioneer of $2.2 million in the second
quarter of 1997. Although,  the Company has recorded similar non-recurring items
in the past, including $2,080,000 in the first nine months of 1996, there can be
no assurance  that similar items will recur in the future.  In addition the 1996
gross margins were negatively  impacted by a $2.2 million  write-down related to
inventory.  Also,  the Software and  Component  Technologies  gross margins have
improved year over year due to aggressive product cost reductions.  There can be
no assurance that these margins will be sustained  because of mix changes within
and  among  the  business  units,  market  pressures  on  unit  selling  prices,
fluctuations in unit  manufacturing  costs and other factors.  While  Commercial
Systems  products have the highest gross margins of all the Company's  products,
those  margins  have  decreased  primarily  in the Land Survey  vertical  market
because  the  Company  has  reduced  prices on these  products  in  response  to
competition.  The Company  expects  competition  to  increase in its  Commercial
Systems  markets and,  therefore,  it is likely that further  price erosion will
occur, with consequently lower gross margin percentages in the future.

* The Company  also  expects  that a higher  percentage  of its  business in the
future  will be  conducted  through  alliances  with  strategic  partners,  e.g.
Honeywell,  Caterpillar  and  Case.  As a  result  of  volume  pricing  and  the


                                       12


assumption of certain operating costs in connection with such partners,  margins
are likely to be lower than sales directly to end-users.


Operating Expenses

The  following  table shows  operating  expenses for the periods  indicated  and
should be read in conjunction with the narrative descriptions of those operating
expenses below:




                                  Three Months Ended September 30,              Nine Months Ended September 30,
                             ------------------------------------------    ----------------------------------------
                                                              Increase/                                 Increase/
                                   1997            1996      (Decrease)       1997           1996      (Decrease)
- -------------------------------------------------------------------------------------------------------------------
(In Thousands)
                                                                                       

Research and development         $ 9,910          $ 9,882      0.3%       $ 29,024       $ 27,851            4%
Sales and marketing               15,145           16,559       (9)%        44,409         49,472          (10)%
General and administrative         7,571            6,608       15%         21,283         23,075           (8)%
Restructuring charges                  -            2,046     (100)%             -          2,046         (100)%
                             ------------  ---------------             ------------  -------------
     Total                      $ 32,626         $ 35,095       (7)%      $ 94,716       $102,444           (8)%
                             ------------  ---------------             ------------  -------------



Research and Development

Research and development expenses increased slightly in the three and nine month
periods  ended  September  30, 1997,  as compared  with the  corresponding  1996
periods. The higher research and development expense in the 1997 periods are due
to an increase in personnel and the related expenses which accompany an increase
in the number of employees.  The increase in research and development  personnel
is part of the Company's continuing focus on developing future products.

* The Company  expects  that a  significant  portion of its future  revenues and
operating  income  will  continue to be derived  from sales of newly  introduced
products.  Consequently,  the Company's future success depends,  in part, on its
ability to continue to advance product technology and to develop and manufacture
new  competitive  products  with high  gross  profit  margins.  Development  and
manufacturing  schedules for technology  products are difficult to predict,  and
there can be no assurance that the Company will achieve timely initial  customer
shipments of new products.  The timely  availability of these products in volume
and their  acceptance by customers  are  important to the future  success of the
Company.  In  addition,  certain  of  the  Company's  products  are  subject  to
governmental  and similar  certifications  before they can be sold. For example,
FAA certification is required for all aviation  products.  An inability or delay
in obtaining such  certifications  could have an adverse effect on the Company's
operating results.


                                       13


Sales and Marketing

The decreased sales and marketing  expenses for the three and nine month periods
ended September 30, 1997, as compared with the corresponding  periods in 1996 is
due primarily to a reduction in headcount and related  expenses  resulting  from
the  Company's  restructuring  in  September  1996.  In  addition,  the  Company
experienced  decreases in advertising and promotional items incurred by Software
and Component Technologies, Aerospace, and Precise Positioning.

The  Company's  future  growth  will  depend  upon the  timely  development  and
continued  viability of the markets in which the Company currently  competes and
upon the  Company's  ability to continue to identify and exploit new markets for
its products. In addition, the Company has encountered  significant  competition
in selected  markets,  and the Company expects such  competition to intensify as
the market for GPS applications  receives  acceptance.  Several of the Company's
competitors  are  major  corporations  with  substantially   greater  financial,
technical,  marketing and  manufacturing  resources.  Increased  competition  is
likely to result in reduced  market share and in price  reductions  of GPS-based
products, which could adversely affect the Company's revenues and profitability.

General and Administrative

The  increase in general and  administrative  expense for the three month period
ended  September 30, 1997, as compared with the  corresponding  period for 1996,
primarily  reflects  higher  legal  expenses  as a result of certain  litigation
matters going to trial in the third quarter of 1997.

The  decrease in general and  administrative  expense for the nine month  period
ended  September 30, 1997, as compared with the  corresponding  period for 1996,
primarily reflects decrease in outside services related to legal fees associated
with the certain  arbitration  and  litigation  matters during the first half of
1996.

Restructuring Charges

During  the  quarter  ended   September  30,  1996,   the  Company   recorded  a
restructuring  charge of $2,046,000.  Components of this  restructuring  reserve
included employee severance packages, the costs of redundant office space, write
downs of idle  assets  and the costs of moving  people.  The  Company  took this
action in order to bring  operating  expenses  into line  with  revenues  and to
restructure existing operations in a more efficient manner.

Income Taxes

The effective tax rate was 20% for the three and nine months ended September 30,
1997. For the comparable periods in 1996 the effective tax rate was (5)% and 4%.
This  lower  rate  was  primarily  due to  operating  losses  with no  currently
realizable tax benefit.


                                       14



Inflation

The  effects of  inflation  on the  Company's  financial  results  have not been
significant to date.

Liquidity and Capital Resources


* For the nine month period ended  September  30, 1997,  net cash  provided from
operating activities was $4,484,000 as compared to cash used of $6,827,00 in the
corresponding  period in 1996.  Cash  provided by sales of common  stock in 1997
represents  the proceeds from  purchases  made  pursuant to the Company's  stock
option and employee  stock  purchase  plans and totaled  $5,981,000 for the nine
months  ended  September  30,  1997.  The Company has relied  primarily  on cash
provided by  operating  and  financing  activities  and net sales of  short-term
investments to fund capital  expenditures,  the repurchase the Company's  common
stock (see further  explanation  below),  and other  investing  activities.  The
Company's  ability to continue to generate cash from operations will depend in a
large part on  revenues  and the rate of  collections  of  accounts  receivable.
Management  believes that its cash, cash  equivalents and short-term  investment
balances, together with its existing credit line, will be sufficient to meet its
anticipated cash needs for at least one year. At September 30, 1997, the Company
had cash and cash  equivalents  of  $26,771,000  and  short-term  investments of
$52,884,000.


In August  1997,  the Company  entered into a three year  $50,000,000  unsecured
revolving  credit  facility  with four  banks  (the  "Credit  Agreement").  This
facility  replaced  the previous two year  $30,000,000  unsecured  line that was
expiring.  The Credit Agreement  enables the Company to borrow up to $50,000,000
provided that certain  financial and other  covenants are met.  Under a separate
agreement the Company has an additional  $5,000,000 line of credit provided only
by the lead bank for "Letter of Credit"  purposes  which is also  subject to the
covenants in the main facility.  The Credit Agreement  provides for payment of a
commitment  fee of 0.25% and borrowings to bear interest at 1% over LIBOR if the
total  funded  debt to  EBITDA  is less  than or equal to 1.00  times,  0.3% and
borrowings  to bear  interest  at 1.25% over LIBOR if the ratio is greater  than
1.00 times and less than or equal to 2.00 times,  or 0.4% and borrowings to bear
interest  at 1.75%  over  LIBOR if the  ratio is  greater  than 2.00  times.  In
addition to  borrowing  at the LIBOR  rate,  the Company has the right to borrow
with  interest at the higher of (i) one of the bank's annual prime rate and (ii)
the federal funds rate plus 0.5%.  To date,  no borrowings  have been made under
the line. In addition, the Company is restricted from paying dividends under the
terms of the Credit Agreement.

In February  1996, the Company  announced  that it had approved a  discretionary
program  whereby up to 600,000  shares of its common stock may be repurchased by
the Company to offset potential  dilutive effects to earnings per share from the
issuance  of stock  options.  The Company  intends to use  existing  cash,  cash
equivalents  and short-term  investments  to finance any such stock  repurchases
under this program.  In 1996, the Company  purchased 250,000 shares at a cost of
$3,545,000.  In the first two quarters of 1997, the Company purchased a total of
139,500  shares at a cost of  $1,834,000.  There were no  repurchase  of Company
stock in the third quarter of 1997.


                                       15



The  Company  is  continually   evaluating  potential  external  investments  in
technologies  related to its business and, to date,  has made  relatively  small
investments  in a number of GPS related  technology  companies.  There can be no
assurance that investments made to date and potential future investments will be
successful.

Inventory as of September 30, 1997  increased by  $8,603,000  from the 1996 year
end levels  primarily  due to new  products  in  Commercial  Systems  which were
introduced  late in the third  quarter and  materials  accumulated  for the CUGR
program in the Aerospace business.

Other Risk Factors

In the past,  revenue has tended to  fluctuate  on a quarterly  basis due to the
timing of shipments of products  under  contracts and the sale of license rights
and seasonal  patterns  favoring  spring and summer for the  Commercial  Systems
business.  However,  the seasonal  patterns were not repeated in 1996, and there
can be no assurances  that prior seasonal  revenue trends will be experienced in
the remainder of 1997. A significant portion of the Company's quarterly revenues
are derived  from orders  received and  immediately  shipped to customers in the
last few weeks and days of a quarter.  If orders are not received,  or shipments
are  delayed  beyond  the  end  of  a  quarter,   operating   results  would  be
significantly adversely impacted.

* The Company has a relatively  fixed cost  structure in the short term which is
determined by the business plans and strategies the Company intends to implement
in the markets it addresses.  This effectively means that increases or decreases
in revenues have more than a  proportional  impact on net income or losses.  The
Company  estimates that a change in product  revenue of $1 million would cause a
corresponding change in the Company's earnings per share by 2 to 3 cents.

* The Company  believes  that the Software and Component  Technologies  business
unit will  comprise a  significant  portion  of the  Company's  business  in the
future. The Software and Component  Technologies business unit differs in nature
from  most of the  Company's  markets  because  volumes  are  high  and  margins
relatively  low.  Software and  Component  Technologies  customers are extremely
price   sensitive.   To  the  extent,   if  any,  that  costs  decrease  through
technological advances, a portion of these cost savings will be passed on to the
customer. To compete in the Software and Component  Technologies market requires
high-volume  production  and  manufacturing  techniques.  Customers  expect high
quality  standards  with  very low  defect  rates.  The  Company  is  relatively
inexperienced  compared  to  competitors  with  far  greater  resources  in such
high-volume  manufacturing  and  associated  support  activities.  The Company's
failure to meet customer  expectations in this market could cause the Company to
lose customer  orders,  which could result in a material  adverse  effect on the
Company's operating results.

The  Company's  stock price is subject to  significant  volatility.  If revenues
and/or earnings fail to meet the expectations of the investment community, there
could  be an  immediate  and  significant  impact  on the  trading  price of the
Company's stock.


                                       16


The  value of the  Company's  products  relies  substantially  on the  Company's
technical  innovation in fields in which there are many current patent  filings.
The  Company  recognizes  that as new  patents  are issued or are brought to the
Company's  attention by the holders of such patents, it may be necessary for the
Company to withdraw  products  from the market,  take a license from such patent
holders,  or redesign  its  products.  The  Company  does not believe any of its
products  infringe  patents or other  proprietary  rights of third parties,  but
cannot  be  certain  they  do  not do so.  In  addition,  the  legal  costs  and
engineering  time  required  to  safeguard  intellectual  property  or to defend
against litigation could become a significant expense of operations. Such events
could have a material adverse effect on the Company's revenues or profitability.
(See Note 5- Contingencies: Other Litigation:, to the financial statements)

The Company is  continually  evaluating  alliances and external  investments  in
technologies  related to its business and has already entered into alliances and
made  relatively  small  investments  in  GPS  related   technology   companies.
Acquisitions  of companies,  divisions of  companies,  or products and alliances
entail  numerous  risks,  including (i) the potential  inability to successfully
integrate acquired operations and products or to realize anticipated  synergies,
economies of scale or other value, (ii) diversion of management's attention, and
(iii) loss of key employees of acquired operations. Any such problems could have
a material  adverse effect on the Company's  business,  financial  condition and
results of  operations.  No  assurances  can be given that the Company  will not
incur problems from current or future alliances,  acquisitions,  or investments.
Furthermore,  there can be no assurance that the Company will realize value from
any such alliances, acquisitions, or investments.

The  Company's  products rely on signals from the GPS Navstar  satellite  system
built and maintained by the U.S.  Department of Defense.  Navstar satellites and
their  ground  support  systems  are  complex   electronic  systems  subject  to
electronic  and  mechanical  failures  and possible  sabotage.  Some of these 24
satellites have exceeded their design lives of 7.5 years and are also subject to
damage by the hostile space environment in which they operate. Repair of damaged
or  malfunctioning   satellites  is  impossible.  If  a  significant  number  of
satellites were to become inoperable,  there could be a substantial delay before
they are replaced  with new  satellites.  A reduction in the number of operating
satellites  would impair the current utility of the GPS system and the growth of
current  and  additional  market  opportunities.  In  addition,  there can be no
assurance that the U.S.  Government  will remain  committed to the operation and
maintenance of GPS  satellites  over a long period of time, nor that policies of
the U.S.  Government  allowing  for the use of GPS  without  charge  will remain
unchanged. Because of ever increasing commercial applications of GPS, other U.S.
Government  agencies may become involved in the administration or the regulation
of the  use of GPS  signals.  Any of the  foregoing  factors  could  affect  the
willingness  of buyers of the  Company's  products to select  GPS-based  systems
instead of products  based on competing  technologies.  Any resulting  change in
market  demand for GPS  products  would have a  material  adverse  effect on the
Company's  financial  results.  Certain European  government  organizations have
expressed concern  regarding the  susceptibility of GPS equipment to intentional
or inadvertent  signal  interference.  Such concern could translate into reduced
demand for GPS products in certain geographic regions.

                                       17



ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

                                                                           Page
         A.       Exhibits                                                Number

                    10.58   Revolving Credit Agreement                    20-111

                    11.1    Computation of Earnings (Loss)  Per Share        112

                    27      Financial Data Schedule                          113

         B.       Reports on Form 8-K

                  There  were no  reports  on Form  8-K  filed
                  during the quarter ended September 30, 1997.




                                       18







                                                    SIGNATURES



Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned, thereunto duly authorized.




TRIMBLE NAVIGATION LIMITED
(Registrant)



By:  /s/Dennis R. Ing                             
        Dennis R. Ing
     (Vice President Finance, Chief Financial
      Officer, and principal financial and
      principal accounting officer)



DATE:  November 12, 1997



                                       19