I have a Ray Marine
E80 chart plotter. I was recently on the boat and the chart plotter would not hold it's orientation. It would rotate back and forth on the screen
. It would not loose its GPS
location. The next day I recalibrated
and it did fine but the next day it was back to not working well.
The problems are 1. autohelm
heading (displayed on unit) is not correct and sometimes appears stuck on one number 2. the chart plotter orientation shifts 3. autopilot
does not work (i.e. hold the correct course).
My diagnosis is something wrong with the heading sensor or communication with the heading sensor. I do not know where to go from here and/or if it is a good idea.