Ah, light dawns on Marblehead!

Yesterday, whenever I sat down to look closely at the GPS and fine tune the
course, the boat would wander off five degrees or so. I was telling myself:

"It hasn't been through the calibration routine yet."

"It's going to hunt until I fiddle with the settings."

"It just seems like it's wandering more because I'm looking closely."

Etc., Etc.

I just realize that the Buck knife on my hip must have been about three
inches from the built in flux gate compass just under the fiberglass cockpit
seat!

--
Roger Long