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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's GPS Rollover Predictions on Target
Products Perform as Expected and Company Reports a Non-Event

SUNNYVALE, Calif., Aug. 23, 1999 -- Trimble (NASDAQ:TRMB) announced today that the company's predictions for product performance during the Global Positioning System (GPS) Rollover event were on target.
On Saturday, August 21, Trimble was fully staffed to assist customers and monitor the performance of over 100 products in real-time during and after the GPS Rollover event. Testing was conducted at sites in the United States, New Zealand, the United Kingdom, Japan, Singapore and Australia. Trimble is pleased to report that, based on engineering observations and field reports from preliminary data, its products performed as expected or better. The company will continue to gather engineering and field data for at least the next several days and will continue to update its web site as more information becomes available.
"We tested a cross section of current and out-of-production products. All products performed as expected without any surprises," said John Lovell, Trimble's director of quality. "We were also in contact with several of our customers involved in critical applications, who reported that they were pleased with their systems' performance. Basically, it was business as usual."
Trimble took an industry leadership role to communicate information about the GPS Rollover to the public. Trimble established a formal task force over two years ago to prepare for the event. The company began detailed testing of its 300-plus product software versions, and posted those results on its web site at The web site was the first and most extensive Y2K and Rollover site compiled by a major manufacturer of GPS receivers.
"Testing our products and posting this information on the web site was important for our customers," continued Lovell. "We wanted our customers to know what to expect during this first-time event for GPS. Most importantly, they needed to know how their products would perform and what, if any, modifications would need to be made."
About the GPS Rollover
GPS is a network of 24 satellites developed by the U.S. Air Force to provide precise timing and navigation information data to the military. Though the system began in the 1970s for military use, GPS has become essential for many civilian uses as well. As a broadcast-only radio system, GPS can be accessed by an unlimited number of receivers.
The GPS Week Number Rollover (WNRO) or End of Week (EOW) refers to the way dates are processed in GPS. GPS satellites track the date by counting the number of weeks up to a total of 1,024. The GPS Week number reset to zero for the first time precisely at 13 seconds before midnight Coordinated Universal Time (UTC) on Saturday, Aug. 21, 1999.
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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