10 great new GPS gadgets
Civilian GPS equipment emerged in the late 1980s, but the Pentagon built in electronic errors to limit the accuracy of nonmilitary devices to within 300 feet. In 2000, President Clinton ordered the intentional errors -- known as selective availability -- turned off, increasing the accuracy of civilian devices to between 30 feet and 60 feet. This ushered in the golden age of GPS, spurring the development of numerous handheld and automotive navigational systems.
