Here's a picture of a Hunter 260 I savaged recently. Tornado like winds blew it and the lift it was on over. They don't sink, but they don't come up easily either. We had to maintain tension on the halyard to keep it upright and raise the back by supporting it off the barge to get it high enough to pump out with the bottom companion way panel in place. We estimated about 2500 gallons of water were pumped out and a few fish.