Current Report

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

                Date of Report (Date of earliest event reported):
                        March 18, 2002 (March 18, 2002)

                           Trimble Navigation Limited
             (Exact name of registrant as specified in its charter)

                 (State or other jurisdiction of incorporation)

                            (Commission File Number)

                             (IRS Employer I.D. No.)
                         645 N. Mary Ave. Sunnyvale, CA
                    (Address of principal executive offices)

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

Item 5. Other Events and Regulation FD Disclosure.

The following  statement was released by Trimble Navigation Limited on March 18,
2002.  The  furnishing  of these  materials  is not  intended  to  constitute  a
representation  that such  furnishing  is required by  Regulation FD or that the
materials include material investor  information that is not otherwise  publicly
available.  In addition, the Registrant does not assume any obligation to update
such information in the future.

              Grayson Wireless Selects Trimble's GPS Receivers for
                          Wireless 911 Location Systems

ORLANDO,  Fla.,  March 18,  2002 - Trimble  (NASDAQ:TRMB)  announced  today that
Grayson Wireless has selected Trimble's Global Positioning System (GPS) time and
frequency  receivers for  installation  in Grayson's  Geometrix(R)  wireless 911
caller  location  systems.  As a part of the  Geometrix  system,  Trimble's  GPS
receivers will provide  precise timing  synchronization  between  Geometrix base
station location receivers to locate an emergency caller's handset.

The announcement was made at the CTIA WIRELESS 2002.

"Precise  timing  synchronization  is a key requirement for our system to enable
carriers to meet the FCC's wireless E911 mandate," said David Cushman, executive
vice  president for Grayson  Wireless.  "We are extremely  pleased to be working
with Trimble.  The  Company's  leadership  and core  strength in GPS  technology
allows it to develop a very tightly integrated, cost-competitive product."

Grayson's  network-based Geometrix Wireless Location Systems are compatible with
all cellular and PCS network  technologies,  and all existing customer handsets.
Grayson builds and installs  Geometrix  systems for wireless  carriers to comply
with the Federal Communication  Commission's (FCC) Phase II E911 regulations for
wireless 911 caller location. The system automatically determines and forwards a
wireless  caller's  location  coordinates to public safety agencies that receive
emergency calls. To maintain caller privacy,  Geometrix  systems are designed to
provide location information only when a wireless user initiates a 911 call.

Although the number of 911 calls from wireless  phones exceed 100,000 per day in
the U.S.,  location  information  for a wireless  caller is not available to the
emergency response agencies.  Instead,  911 dispatchers must rely on information
given by the mobile caller who, because of injury or unfamiliarity  with his/her
surroundings, often cannot provide accurate location information. This can delay
or prevent  assistance to the  emergency.  To address this problem,  the FCC has
mandated that wireless carriers must install location systems able to locate the
majority of 911 emergency callers within 100 meters.

Grayson's  Geometrix system can locate wireless 911 callers within the FCC's new
accuracy  requirements.  The system  makes  precise  measurements  of a wireless
caller's signals at special  Geometrix signal sensors installed at multiple base
station (cell) sites in wireless  carrier  networks.  Grayson's  system uses the
very small  differences  in the caller's  signal  arrival  times at the multiple
receiving sites to calculate a caller's location. The signal timing measurements
require great accuracy and close synchronization among the Geometrix sensors. To
do this,  Grayson is installing  Trimble's  GPS receivers in Geometrix  wireless
location sensors to supply timing and  synchronization to within 100 nanoseconds
or better.

About Grayson

Grayson  Wireless  (,  a division  of Allen  Telecom  Inc.,
(NYSE:   ALN)   designs,   builds,   and  markets  the   Geometrix   system,   a
state-of-the-art, scalable, cost-effective, network overlay solution intended to
allow carriers to meet the FCC's stringent  Phase II  requirements  for wireless
E911  caller  location.  Geometrix  is the  first  Phase  II-compliant  wireless
location  system to be placed into commercial  service,  and to date remains the
only Phase II-compliant  system in service.  Geometrix works with the CDMA, GSM,
TDMA,  AMPS, and iDEN wireless  technologies,  and is thus  compatible  with all
wireless  phones in use in the United  States.  In addition to meeting FCC E 911
requirements,  Geometrix  can also  provide  caller-locating  support for a wide
variety of location-based value-added services.

About Trimble

Trimble is a leading innovator of Global Positioning System (GPS) technology. In
addition to providing  advanced GPS components,  Trimble augments GPS with other
positioning  technologies  as well as wireless  communications  and  software to
create complete  customer  solutions.  Trimble's  worldwide  presence and unique
capabilities position the Company for growth in emerging applications  including
surveying,  automobile navigation,  machine guidance,  asset tracking,  wireless
platforms,   and   telecommunications   infrastructure.   Founded  in  1978  and
headquartered  in Sunnyvale,  Calif.,  Trimble has more than 2,000  employees in
more than 20 countries worldwide.

For an interactive  look at company news and products,  visit Trimble's Web site


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 hereunto duly authorized.

                                                TRIMBLE NAVIGATION LIMITED
                                                a California corporation

  Dated: March 18, 2002                         By: /s/ Mary Ellen Genovese
                                                Mary Ellen Genovese
                                                Chief Financial Officer