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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 Sets Its Sights on the Construction Market for
GPS Machine Guidance

LAS VEGAS, March 23, 1999 - Taking Global Positioning System (GPS)-based machine guidance technology to the next level, Trimble (NASDAQ:TRMB) introduced today its SiteVision GPS™ Grade Control System for the construction market.
SiteVision GPS is designed to help bulldozer operators increase productivity and work in a stakeless environment. It puts the design in the cab where operators can actually see the site plan. Using precise GPS technology, the system allows machine operators to accurately perform earthmoving operations for highway and road construction, residential and commercial sub-divisions projects as well as other land development.
The announcement was made at the CONEXPOCON/AGG '99 Exhibition.
"The heavy equipment market is without a doubt one of the most exciting new venues for GPS integration," said Mark Nichols, Trimble's senior director of mining, construction and agriculture. "Precise GPS machine guidance will enable machine operators to share the benefits of GPS, which have already been proven in open pit mining."
SiteVision GPS provides the earthmoving operator a machine guidance tool that uses high-performance GPS, a ruggedized, on-board computer and three lightbars. The computer displays a site plan and the machine's position on the construction project, while the lightbars provide up/down direction for the bulldozer blade and right/left direction of a defined alignment. Design files and digital terrain models are transferred to and from the system using PC data cards.
SiteVision GPS Grade Control System includes: a rugged field computer with a color, sunlight-readable display; a high precision dual-frequency receiver with dual antenna input to provide precise location, orientation and cross slope of the machine blade; two ruggedized dual-frequency GPS antennas; three lightbars; and a radio. The system supports design software packages such as Autodesk Civil Design, Infrasoft Ltd. MX products, Intergraph InRoads and InRail as well as many others.
Trimble's SiteVision GPS is anticipated to be available in August. The system will be distributed through Trimble's worldwide dealer network.
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, 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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