I am amazed at the number of folks plying the waters without a properly calibrated compass and a deviation card!!!!
I have mine professionally calibrated every two seasons or any time I make an electronics change near my compass. Read the article in the link below and please find a professional to swing your compass!!!!!!!
I can guarantee that many of your compasses are off... way off!!!!!!!!!! Get them calibrated please!
Charlie is my compass guy and it's some of the best money I spend.
Charlie Cook / Maine Compss Services (LINK)
I guess we've become a point & click sailing forum.. Compass what's that???