GPS Magnetic/True
Hi Steve,
I know it's not an ideal solution, primarily because your compass at the helm is Magnetic, but you could possibily set your GPS to use True. I'm not sure if you have a GPS display at the helm, but if you did you might use it for heading and bearing and possibly get by not using the compass much at the helm. Your autopilot wouldn't care if you were using True or Magnetic.
Just an idea. I use Maptech and magnetic everywhere and I guess it would feel really strange to me to change to True.
Enjoy,
Bob