Crusing out beyond sight of land could be a lonely place and in distant occasions communication with the land while at sea was nonexistent. Now a days with the introduction of VHF, SSB radios, and Satellite tv for pc telephones, with the power to ship and obtain emails, the world is a smaller place.

A sat nav (quick for satellite navigation) is absolutely some very special software that uses the GPS signal. It takes the co-ordinates provided by the GPS and combines that with a complete map. Then, given a destination, the sat nav software will calculate a route for you to your destination. Because the GPS signal is continually updated, the sat nav can give you step-by-step directions on where you might be and when you should make a flip.

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