I recently ran a mission where Mission Planner reported the “Bad compass Health” alarm. The heading was changing correctly on the ground so I took off and tried a short mission. The plane completed it accurately and successfully, with the Bad Compass Health showing the whole time.
I just read that the Bad Compass Health means that the compass has “not sent a signal for at least half a second.”
Since my Bad Compass Health alarm was in effect for the entire flight, did the plane use dead reckoning and the GPS instead?