In article , Carl Ellis
wrote:

I know an Alaskan bush pilot who said "what you have in your pockets and on
your back are your survival kit, anything else is extra".

Similarly, I have read much of the Vietnam era books by
fast-/slow-mover and helo drivers. Their saying was, "if it isn't on
you, it won't get out of the aircraft with you. I have started wearing
a fishing vest with the basics stashed in the pockets.