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using of the Wide Area Augmentation Service (WAAS) broadcast by the U.S.
Department of Transportation.
Who uses GPS?
Because GPS receivers can provide highly accurate position, velocity, time and
navigation information, they are critical to a variety of applications: charting and
mapping, plotting a course, navigating from point to point, tracking the movement of
vehicles and vessels, locating previously identified sites, measuring the movement of
objects, timing communications signals, measuring elevation and other tasks
Surveyors and mapmakers, aviators and ships' captains, trucking fleets and ambulance
services all use GPS. So too do farmers, mining companies, environmental remediation
firms and cellular communications providers. Consumers use GPS for pleasure boating,
fishing, hunting, hiking and other outdoor activities, to find out where they are and to
navigate to their destination.
Vehicle navigation is becoming one of the largest GPS markets, fueled by products such
TM
as the Pocket GPS Navigator
from Pharos that enable address-specific routing and
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