EXHIBIT
23.1
Consent
of Independent Registered Public Accounting Firm
We
consent to the incorporation by reference in the Registration Statement (Form
S-8) pertaining to the 1988 Employee Stock Purchase Plan and 2002 Stock Plan
of
Trimble Navigation Limited of our reports dated March 8, 2006, with respect
to
the consolidated financial statements and schedules of Trimble Navigation
Limited included in its Annual Report (Form 10-K) for the year ended December
30, 2005, Trimble Navigation Limited management's assessment of the
effectiveness of internal control over financial reporting, and the
effectiveness of internal control over financial reporting of Trimble Navigation
Limited, filed with the Securities and Exchange Commission.
/s/
Ernst & Young LLP
Palo
Alto, California
November
3, 2006