i figured it out= i guess if you are really, really bored, on a wind less day with nothing else to do, and want to put your boat thru unnecessary stress and strain this is how to 'conrol sink' your boat= (this only works in tidal areas). at high tide anchor your boat in about 2' to 3' of water near shore. secure it so it want move around with 2 or more anchors. undo the drain plugs and watch her go down. you probably need to screw out the inspection holes to hasten process. you can even act like you are brave and 'go down with the ship'. oh, the beach goers will think your are wacko. as the tide goes out, she's on the hard again and should naturally drain! brilliant, huh?