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Originally Posted by FLboater
I believe that the compass on my Garmin GPS takes it setting from a satellite position. Is this all true? It is different from the compass by a few degrees. This is in Florida.
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Pretty sure you can select your GPS to display true north or magnetic north. Magnetic north will display the same as a properly set up compass, minus the deviation for the heading. The GPS won't have any deviation since it determines magnetic north solely through math and your location. Every compass will have some deviation since it's impossible to tune out on every heading.