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GPS Global Positioning System
The Global Positioning System (GPS), is currently the only fully functional Global Navigation Satellite System (GNSS). More than two dozen GPS satellites are in medium Earth orbit, transmitting signals allowing GPS receivers to determine the receiver's location, speed and direction.
Since the first experimental satellite was launched in 1978, GPS has become an indispensable aid to navigation around the world, and an important tool for map-making and land surveying. GPS also provides a precise time reference used in many applications including scientific study of earthquakes, and synchronization of telecommunications networks.
Developed by the United States Department of Defense, it is officially named NAVSTAR GPS (NAVigation Satellite Timing And Ranging Global Positioning System). The satellite constellation is managed by the United States Air Force 50th Space Wing. The cost of maintaining the system is approximately US$750 million per year, including the replacement of aging satellites, and research and development. Despite this fact, GPS is free for civilian use as a public good.
Garmin GMAP 60CSx The venerable Garmin 60CS just got a whole lot better. The 7.5-ounce GPSMap 60CSx now features an insanely accurate, high-sensitivity GPS receiver by SiRF that tracks your position even in tree cover and canyons. Plus, you get a bright, sunlight-readable color TFT display and an included a 64 MB microSD card for storage of optional map detail. Add all that to the 60CSx's integrated barometric altimeter and electronic compass, and you've got a unit that is ready to take you anywhere on land or sea.
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Garmin GMAP 60Cx The GPSMAP 60Cx is a refreshing upgrade of the GPSMAP 60C, one of our most popular models for outdoor and marine use. This unit features a removable microSD card for detailed mapping memory and a waterproof, rugged housing. The microSD card slot is located inside the waterproof battery compartment. Users can load map data and transfer routes and waypoints through the unit's fast USB connection. In addition, this unit features a new, highly sensitive GPS receiver that acquires satellites faster and lets users track their location in challenging conditions, such as heavy foliage or deep canyons. |
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Garmin eTrex Legend Cx Handheld GPS Navigator With the Legend Cx, Garmin has updated a much-loved device with expandable memory on a microSD card so you can load optional map data for your hiking, cycling, and other outdoor excursions. Add to that a bright, full-colour TFT display, automatic routing, and long, 36-hour battery life, and you've got a great companion for your next outdoor or boating adventure. |
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Garmin GMAP 76CSx The GPSMAP 76CSx is a refreshing upgrade of the GPSMAP 76CS, one of our most popular models for outdoor and marine use. This unit features a removable microSD card for detailed mapping memory and a waterproof, rugged housing. The microSD card slot is located inside the waterproof battery compartment. Users can load map data and transfer routes and waypoints through the unit's fast USB connection. |
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Garmin Vista Cx Pack more detail into your adventure with the eTrex Vista Cx and eTrex Legend ® Cx. Garmin has added removable memory to these pocket handhelds, making it easy to pack light and add maps on the go.
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Garmin GMAP 76Cx The GPSMAP® 76Cx is a refreshing upgrade of the GPSMAP 76C, one of our most popular models for outdoor and marine use. This unit features a removable microSD card for detailed mapping memory and a waterproof, rugged housing. The microSD card slot is located inside the waterproof battery compartment. Users can load map data and transfer routes and waypoints through the unit's fast USB connection. In addition, this unit features a new, highly sensitive GPS receiver that acquires satellites faster and lets users track their location in challenging conditions, such as heavy foliage or deep canyons. |
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