Mark _australia said...
Take their life vest and use it to sit on (reef can be unpleasant). Untie myself from th other person, and unravel the rope so as to have strings. Use a bit of flesh from the other person attached to the string as bait to lure in fish or crabs or something for bait. (yes I know they were only unconscious but they'll just be a liability, may as well use them for bait (in the absence of cats)
Turns out you're chained, the only way to free yourself is to either cut off your foot or his... it's gona be very hard to gnaw either off, and given your poor flexibility... impossible.
Using him for bait could be risky... maybe better to use him as food.