Global positioning systems - what are they?
Year: 03-12-2006 | author: Carlton Leigh
Global Positioning System (GPS) is a satellite navigation system to determine the location, time, and direction. Set in place and U. S. Department of Defense. In the first days, GPS technology was implemented to track aircraft and military ships. On the water or in the air without landmarks might be easy to get confused - this is where the GPS system power.