Tip - How to Use a GPS on a Boat | eHow

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How to Use a GPS on a Boat | eHow

A marine GPS provides not only your own boat's location but shows you the course to steer to reach that destination, both graphically and as a heading or course to the destination once you have the coordinates of your destination in hand. Some GPS units give only this basic information; others, called chart plotters, may render a navigational chart...

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