[CA] [CA11] Aligning compass to GPS

[Ken Tappert]

I am having a similar issue with EV-1 installed 2 years ago. When in my slip the autopilot display shows heading that is within 2 degrees of binnacle compass and heading on GPS. While sailing today in an easterly direction autopilot display showed a heading 50 degrees lower (more north) than binnacle compass and GPS were indicating. Returning to the west the autopilot showed a heading 30 degrees higher (more north) than the other sources. When back in slip it was again aligned with the other sources. I have had other instances of autopilot heading readings varying from other proven sources. Thanks for your help.