I don't know, but here is what I think. On the self bailers I think if the deck filled with water it would turtle because it would then be top heavy = all that water up high and a big void below the floor. Not sure what she'd do - sink or float after turtlage. Now if there was a leak and the below deck filled with water I do believe she may still float upright. Forgot the plug in my old V20 one day. Key word, one day. Only takes once to make you remember that. Anyway water came to the top of the in-deck fish boxes and the transom was about 1" from dipping below the water. She was pretty much slam full and 3 POB. Had to reach down there and screw in the plug, then pump out water for 30 min. Enjoyable! In my defens - that old V had 2 plugs. One was underneath. I assume a PO installed it in order to get every last drop out of the bilge. I only forgot the one I couldn't see.
