Re: Raymarine compass interference
Most mag compasses have the most trouble tracking north because you get the most boat interference. Boat needs to be well balance for auto to work, little to no weather helm. And you need to steer within something like within 2 deg. steady of the course to be maintained. And if you have too much play in the steering system,auto won't work well at all. I have the St4000 on my 32' (11500 LB displacement) Bristol keel/CB, with wheel conversion and added the rudder position indicator that is supposed to help with eliminating the back and forth, did not help. CB needs to be down for auto to work well. I find that there is no guarantee that auto will hold. But I love it and use it often, works well for the most part. Useless down wind.