Quote:
Originally Posted by Justin Case
In the heat of the battle when I enter a course change on the compass it is always 180 degrees off, as it is not True, absolute but relative..??
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The link Pisces supplied shows how the compass works ... and why it appears to be 180 out. If you anchor the compass over your sub and then drag it in the direction you want to go, the correct (true course) will show under the (red) line.