Well, lets see. I am a private pilot. I always have a multitool, a swiss army knife and my tin when I fly. If I had to choose only one, then it would be the multitool when flying. My reasoning is that it is capable of disassembling the craft for usefull items after a crash. <br>Thats assuming my ankles were still in one piece. <br>My largest fear is not going down in the wilderness. Its an engine or primary control failure, at the end of the runway, at the treeline, on a hot and humid day, during takeoff.