NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Byron Franklin
Date: 2012 Nov 15, 03:30 -0800
This is part of an old trick to correct magnetic compass on a boat. Head to a buoy, read the compass, add 180 degrees, put buoy on your stern and head away, read the compass, it should be the added 180 this difference gives the amount of compass error. Move magnets or adjust the compass to ½ the found error. See what your compass reads!
Let me know what you think.
Byron: Above should have read, This is the amount of deviation of compass error. with no boat this should be very small and perhaps just in your compass.
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