Can I safely fly arduplane without a compass? If yes, what won't work as well without a compass? I have an APM 2.0 with a bad internal compass and it won't accept an external compass (even after cutting the trace). I read a few post that talked about the compass not be as important to way point flying on a plane. I mostly just use RTL as a fail-safe in case I fly out of range or lose a radio/video link for FPV flying.
I did my best to search before posting but didn't find anything.