I have a raymarine auto pilot where the compass either has 'no data' or
will
just simply show the wrong data. I understand the reason could be a
metalic
object near by. So I know where to look, how far from the compass should
there be no metalic objects? Does the compass only read in the direction
immediatly ahead or is it all around or does it just pick up north, hope
someone can help. Mark

Heh, the flux gate compass in our boat is located in a locker exactly where
it's convenient to stow the outboard or gas grill. Any time I put one of
them near it the auto pilot's heading goes screwy. I plan on moving the
compass to a different location later this season. Meanwhile I just move
the metal objects when I need to use the autopilot (which isn't that often).