Going Public - GPS Declassified: From Smart Bombs to Smartphones - page 100

Fig. 6.5. gps Block iir(m) satellite.
(Courtesy National Coordination
Office for Position, Navigation and
Timing)
Fig. 6.6. gps Block iif
satellite. (Courtesy
National Coordination
Office for Position,
Navigation and Tim-
ing)
vehicle dashboard or boat instrument panel. Both of these commercial receiv-
ers set the stage for broader use of gps for navigation.
With public use of gps growing and inquiries about it proliferating, the Pen-
tagon asked the Department of Transportation in 1987 to create an office to
coordinate civilian use. In 1989 the U.S. Coast Guard became the official liai-
son between military and civil users through creation of the Navigation Cen-