Having a sealed mast with enough volume to keep the boat from turtling is the very best insurance against ever getting into such a situation.
Rolf: Yes, but...I think most would agree, at least in the case of the H16, I don't care how well the mast is sealed, in strong winds (when things happen fast, including mistakes leading to capsize) that this boat is going turtle. I don't know what is is about the boat (maybe the raised tramp?) they just do.
