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Why are GPS units showing up everywhere? Because Paper Maps belong to the past. Twenty Years ago, you had to rely on a compass the position of the Sun and Stars, paper maps or your own common sense to get direction. Not anymore! Now you can have a handy little device in your car, on your wristwatch or even built into your wireless phone. Anti-theft systems use one, heavy construction equipment might use one and having one on your boat now seems to be a requirement. But First What is a GPS Unit?

A GPS (Global Positioning System) unit has the primary function of calculating its own location on land or water by using satellite signals. Once the GPS unit knows its own location, it can help the user determine direction and distance to other known locations. Since the GPS devices rely on air signals you must have a GPS receiver and a clear view of the sky for them to work. When your device is turn on it is actually linking up with 27 orbital satellites are located in place Once you decide on a model that you are interested in, it is very important to know which one is right for you. Prices can range from $100-$5000 dollars, so it is important to do your homework.

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