Any way to attach a GoPro to a sailing dinghy without damaging/making holes in it?

Other answer:

?:
I've used that on a windsurfer (also underwater…) but a safety line is probably a good idea
adaviel:
Mine came with a suction mount; I've used that on a windsurfer (also underwater…) but a safety line is probably a good idea
Ian K:
Just tape it and tie on a safety line.
Harry Buttcrack:
Gorilla tape.