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GPS Systems and Geocaching Discuss this eTheme

Learn about a 24-satellite constellation situated around Earth to provide people with a Global Positioning System. Find out about new popular Geocaching game or GPS treasure hunt. Learn how to read clues of your surroundings and get oriented in unfamiliar places. Includes photographs, maps, and latitude and longitude finders.

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  • 5,
  • 6,
  • 7

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Created: May 02, 2005 at 04:33 | Updated: August 02, 2013 at 19:45