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You need an up-to-date magnetic variation chart. Set the degrees to True North. This will give you your location to 200 miles. Magnetic North changes a little every year. Next you need to know wh...
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You need an up-to-date magnetic variation chart. Set the degrees to True North. This will give you your location to 200 miles. Magnetic North changes a little every year. Next you need to know wh...