I have a 12' Achilles that has now been in lakes, floated rivers, and spent a fair amount of time in salt. I have 5 separate air chambers (it is supposed to float even if you stabbed 3 of them, although I hope I never test it). I even spent some time at Sekiu in some real swells. These are the type of boats that big boats rely on when they get in trouble. When in doubt, opt for safety though. Half a brain and half a boat is better than no brain and a big boat.