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GPS

Global Positioning Systems or GPS is a position-finding system which uses radio receivers to pick up signals from four or more special satellites (there are 24 in orbit) and compute co-ordinates for the receiver. The position accuracy depends on the sophistication of processing and the time available for reception. Real-time navigation using GPS on aircraft and ships can be to better than 10m. Processed data from several hours observation can provide relative positions accurate to centimetres. Devices can now be used in cars and by individuals to navigate to there destinations or find their location.

Garmin nüvi 260W 4.3-Inch Widescreen P... $129.99	Garmin Portable Friction Mount $27.99	Garmin nüvi 265W/265WT 4.3-Inch Widesc... $169.97

Garmin nüvi 765/765T 4.3-Inch Bluetoot... $214.99	Garmin Portable Friction Mount [Amazon Frus... $29.96	Garmin nüvi 285W/285WT 4.3-Inch Widesc... $159.94

Garmin nüvi 255W 4.3-Inch Widescreen P... $138.69	Garmin nüvi 780 4.3-Inch Widescreen Bl... $178.00	Garmin Forerunner 305 GPS Receiver With Hea... $167.99
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