Originally Posted by Alaskan Sea-Duction
Ha agree GFC.
So on the serious side. Can this mess up our auto pilots in the near future? Has the main recreational boating community like Garmin, Ray Marine, etc need to pay attention? New compass swing?
The compass will point to magnetic north no matter where it may be. "Swinging" it only helps you figure out how close to magnetic north the compass is pointing. If the magnetic pole starts getting jiggy on you, moving faster in various directions, than it will affect what the charts do say vis what is the variance in "annual increase/decrease" is over time.
If your AP includes an option to True, then yes you want to find out what it thinks the present variance is. GPS goes down on occasion, so you need to know what your backup means.