How to pass it on

@tridge @Knaldgas
This seems to work OK. From https://github.com/ArduPilot/ardupilot/pull/7215 we have the following settings:
SIM_GPS_TYPE=5
SIM_GPS_HDG=1
COMPASS_USE=0
COMPASS_USE2=0
GPS_TYPE=16
GPS_HDG_ENABLE=1
EK3_ENABLE=1
EK3_MAG_CAL=5

The ones marked in Bold I do not have in “Full Parameter List” - do I have a wrong version of ArduRover ?

I have also set:
COMPASS_EXTERNAL=2
COMPASS_AUTO_ROT=0
GPS_TYPE=5 NMEA
GPS_AUTO_SWITCH=0

But it is in FAILSAFE because it does not have a calibrated Compass. How do we get ArduPilot to accept this as a calibrated compass ?

What is EK3_MAG_CAL=6 ?