For anyone interested in slaving garmin gpsIII+ to autohelm AP
- I struggled with getting the autohelm to tract a route in the garmin
for sometime but finally got it to work based on a little adjustment
to the wiring. The secret was put the brown wire from the garmin to
the NMEA input on the autopilot and a jump from the Garmin GROUND
WIRE to the the NMEA output on the autopilot.
Having an autopilot slaved to a gps route can be very useful under