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Trimble Inc.
935 Stewart Drive
Post Office Box 3642
Sunnyvale, CA 94085
1.408.481.8000 phone
1.408.481.7781 fax


Trimble Receives First FAA Certification
for Dual-Use 12-Channel GPS Receiver

NASHVILLE, Tenn., Sept. 15, 1999 -- Trimble (NASDAQ:TRMB) announced today that its TASMAN™ ARINC-12 has received Technical Standard Order (TSO) certification C-129a Class B1/C1 from the Federal Aviation Administration.
The TA-12 is the industry's first standalone P(Y) code Global Positioning System (GPS) sensor to receive TSO certification for both military Precision Positioning Service (PPS) and commercial Standard Positioning Service (SPS) aviation operations.
The announcement was made at the Institute of Navigation GPS '99 Conference.
"For military aircraft, FAA certification for navigation systems is an emerging requirement," said Jeff Tonnemacher, Trimble's director of military and advanced systems. "Trimble is proud to be the first and only supplier of a 12-channel, FAA TSO'd GPS sensor that addresses this market need."
Trimble's TA-12 was designed for military and commercial aviation applications requiring a robust GPS receiver for integration with existing or new Flight Management Systems that require Instrument Flight Rules (IFR)-certified operations.
The TA-12 is a dual frequency, all-in-view, 12-channel GPS receiver that meets key GPS Receiver Applications Module (GRAM) requirements. It corrects for Selective Availability (SA), incorporates Receiver Autonomous Integrity Monitoring (RAIM) and Fault Detection Exclusion (FDE), and protects against spoofing. The TA-12 has interface capabilities to dual FMS, IRS and Air Data installations using ARINC 743 standards. It also provides users with an upgrade path to WAAS and SAASM.
About Trimble
Trimble is a world leader in designing and developing innovative products enabled by GPS technology. The company provides end-user and OEM solutions for diverse applications including surveying, mapping/GIS, agriculture, construction, mining, military, commercial aviation, automotive, vehicle tracking and timing. Founded in 1978, Trimble now holds more than 200 U.S. patents on GPS and related technology, with over 180 additional patents pending. Located in Sunnyvale, Calif., Trimble has been adding value to GPS since 1984.
Media Contact:   LeaAnn McNabb of Trimble: 408-481-7808

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