Don't completely discount the spear as a survival tool.

Steven Callahan survived for 76 days in an inflatible life raft because he was able to spear the fish that were attracted to the raft. He was unable to catch fish with a hook because the large fish would bite right through the line and he didn't have a wire leader.

At one point, when he jabbed a fish the spear tip came off inside it and it swam away. He was able to fashion a new spear tip from, among other things, a mess kit butter knife.

Would you trade your smallest knife for your only chance to eat?