Nick,

I don't think it would have been the hull making the squeak. The hull would have made a "thumk" noise.

We often race with a family of dolphins on Westernport bay and they are pretty good at avoiding the dolphin striker at above 15 knots. <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />. Your friendly dolphin may have been young and inexperienced. Never heard them squeak though.

Regards,

Peter