I know that most people here would manually take off, than loiter, than start mission.
A swiss company has been intensively using a system which allows the engine to start at a ready-to-mission speed when shaked. Basically, when you are ready in the field, you just shake the winglet and release it. Then off it flies to accomplish its mission.
Do you know any way to do that with the APM ?
You can watch here the take-off procedure here, at 00:30