Thanks to list members for advising me on my "new" 1985 M-15. Today I cut out the tray in the starboard sail locker with a Sawzall. It looks almost as good as the factory sail locker. The access let me get a close look at the flotation. Having adequate floatation to keep a swamped boat floating is the ultimate safety device in my opinion. This evening I scrutinized the floatation of my M-15. In the aft compartment there were five rectangular pieces of Styrofoam having a measured volume of 2.28 cubic feet. The cavity directly under the cockpit sole was about 2.95 cubic feet. The foam blocks were not all under the cockpit sole but were scattered around the compartment. In the forward compartment there were 26 triangular pieces of Styrofoam having a measured volume of 2.31 cubic feet. (Yup, I measured every one.) These pieces were loosely packed into a bow cavity which had an estimated volume of 4.17 cubic feet. Very rough estimates place the floatation needed for the bare M-15 at about 500 pounds. The fiberglass needs 350 pounds, the keel 250 pounds and the core floats 100 pounds. The foam presently in my boat should float about (2.28+2.31) x 62 or 285 pounds. It seems the boat needs about 200 pounds MORE floatation. I could get about 100 pounds more floatation by packing more foam into the bow compartment. Am I missing something here or will my M-15 in it's present condition SINK, if filled with water? I have only read a few of the Archives, maybe someone has figured this out. Has anyone seen a swamped M-15? I once had a Ranger 20 with similar floatation in the bow and under the cockpit. During a race in Idaho a Ranger 20 was knocked down when a gust hit the boat with the spinnaker flying. It filled with water and did NOT sink. I did not see this capsize but it was nice to know the flotation had been tested. Does anybody know about any M-15 flotation tests? Charless Fowlkes Bozeman, MT