I mentioned the NACRA lawsuit NOT to make the claim that the boat sank. If I remember the story right, one hull did flood somewhat due to a leaking port cover. Supposedly this led the sailors to think the boat was sinking (or in danger of) and they decided to swim for shore, when indeed the boat stayed afloat and they should have stayed with it. They violated several common sense rules, and they paid a price for it. If I remember right, however, part of their lawsuit did make the claim of inadequate flotation. I mentioned it because I would think that such things would still be a sore subject in the industry, and that to produce a boat without some sort of positive flotation might be asking for it these days. Even my roto-molded sea kayak has expando-foam in the bow and stern for flotation. Again, I thought the USCG reg for small boats included a flotation requirement. Maybe a sealed hull counts, and breaches don't enter enter in the equation. In a high-speed sailing craft, a compromise to the hull is possible.