EXHIBIT
32.1
CERTIFICATION
OF CEO PURSUANT TO 18 U.S.C. SECTION 1350,
AS
ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF
2002
In
connection with the Quarterly Report on Form 10-Q of Trimble Navigation Limited
(the "Company") for the period ended June 30, 2006 as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), Steven
W.
Berglund,
as
Chief Executive Officer of the Company, hereby certifies, pursuant to 18
U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
of
2002, to the best of his knowledge, that:
(1) the
Report fully complies with
the requirements of Section 13(a) or 15(d) of the Securities Exchange Act
of
1934, and
(2) the
information contained in
the Report fairly presents, in all material respects, the financial condition
and results of operations of the Company.
/s/
Steven
W.
Berglund
Steven
W.
Berglund
Chief
Executive Officer
August
7,
2006