Join Date: Aug 2007
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If my memory serves me, part of the calibration procedure is to do a 'deviation' check and correction. This is done with practically every electronic compass or wind direction indicator I know of regardless of manufacturer. It may not be part of your problem (or solution), but a value of 9, as you say, is excessive. The value should be in the close neighborhood of 3.
More specifically, it sounds like your 'damping' is set way too high. You can get all the reference material including manuals from the Raymarine website, even for 'retired' instruments.