Just bought my boat this fall and I am wanting to leave my boat in the water during the winter months......wanted to know if anyone has successfully drained their water ballast while in the water...and under power. In Tennessee, we may see 15-20 degree days, but they are few.I was told by a friend who has a new MacGregor 26, that while motoring, he opens his ballast and removes the 'air plug......this allows his ballast to empty. Didn't know if the same might be true of the Hunter 23.5.I don't want to have to pull my boat out of the water after sailing and drain the ballast, unless it is necesary. I also don't want to destroy my boat with a frozen ballast.Anyone have any thoughts on this? Thx! John Johnson