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- Navigation (15650 bytes)
7: ... of open ocean, to tiny inhabited islands, using only their own senses and knowledge, passed by oral t...
18: ... status, since in times of famine or difficulty, only they could trade for aid or evacuate people. Th...
67: The LORAN system is based on measuring the phase shift of [...
105: Around [[1960]], [[Loran | LORAN ]] was developed. This used time-of-flight of ra...
114: ...ts accurate geographic location with an error of only a few metres, and precision timing to less than ... - Global Positioning System (28209 bytes)
24: ...tion. If elevation information is already known, only signals from three satellites are needed (the po...
39: ...y the U.S. government and are generally provided only for military use. The keys are changed on a dail...
62: The antenna receives not only direct GPS signals, but also multipath signals: ...
65: ...curate Precise Positioning Service was available only to the United States military, its allies and ot...
71: ...DGPS network has been mainly developed by the [[Finland|Finnish]] and [[Sweden|Swedish]] maritime admi...
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