When flying in P mode, on the map there is a green or yellow line drawn to show the direct route back to home. If I fly out a couple miles and it looses satellite connection for some reason and it switches to atti or if I have a compass error, will that line still be there? So I can fly back manually. If not, will RTH work if I hit the button on the controller? I could probably test this myself, but I was just sitting here thinking about it because I flew over some heavily wooded rolling hills (small mountains really) with no reference but trees. I was wondering what I would do if I lost GPS, compass, video or all three.