I have a 2006 Mainship Pilot 30 Classic and installed a Garmin GHC 20 autopilot with SmartPump last July. I cannot calibrate the compass (CCU). It may be because I have it installed in a bad location. I would like to hear from someone who has successfully installed this unit and find out where in the vessel they installed the CCU. It will hold a course fine but the compass reading does not align with the Garmin Chartplotter. The unit will also not pass the lock-to-lock test.
Mainship Pilot 30 Classic
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