Precise satellite-based navigation and location system originally developed for U.S. military use. GPS is a fleet of more than 24 communications satellites that transmit signals globally around the clock. With a GPS receiver, one can quickly and accurately determine the latitude, the longitude, and in most cases the altitude of a point on or above Earth’s surface. A single GPS receiver can find its own position in seconds from GPS satellite signals to an accuracy of one metre; accuracy within one centimetre can be achieved with sophisticated military-specification receivers.

This capability has reduced the cost of acquiring spatial data for making maps while increasing cartographic accuracy. Other applications include measuring the movement of polar ice sheets or even finding the best automobile route between given points.

Garmin nüvi 350 3.5-Inch Portable GPS Navigator with Text-to-Speech (Electronics) tagged "gps" 317 times

Garmin nüvi 350 3.5-Inch Portable GPS Navigator with Text-to-Speech (Electronics)
By Garmin

Buy new: $329.99
$199.99
75 used and new from $139.95
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Garmin nüvi 360 3.5-Inch Portable GPS Navigator with Bluetooth and Text-to-Speech (Electronics) tagged "gps" 146 times

Garmin nüvi 360 3.5-Inch Portable GPS Navigator with Bluetooth and Text-to-Speech (Electronics)
By Garmin

Buy new: $279.99
$229.99
38 used and new from $185.00
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Garmin nüvi 660 4.3-Inch Widescreen Bluetooth Portable GPS Navigator (Electronics) tagged "gps" 136 times

Garmin nüvi 660 4.3-Inch Widescreen Bluetooth Portable GPS Navigator (Electronics)
By Garmin

Buy new: $299.99
64 used and new from $279.99
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TomTom ONE 3rd Edition 3.5-Inch Portable GPS Vehicle Navigator (Electronics) tagged "gps" 128 times

TomTom ONE 3rd Edition 3.5-Inch Portable GPS Vehicle Navigator (Electronics)
By TomTom

Buy new: $143.61
15 used and new from $128.59
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Garmin StreetPilot c340 3.5-Inch Portable GPS Navigator (Electronics) tagged "gps" 111 times

Garmin StreetPilot c340 3.5-Inch Portable GPS Navigator (Electronics)
By Garmin

Buy new: $149.00
32 used and new from $100.48
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