A satellite phone, a GPS and some kind of dynamo charger to charge them if needed.
This sounds like cheating, but based on the lack of rules I think you win.
edit: If you want off the island that is.
A satellite phone, a GPS and some kind of dynamo charger to charge them if needed.
This sounds like cheating, but based on the lack of rules I think you win.
edit: If you want off the island that is.