Trying to get to the marina

After working on Drifter all summer with a couple of weekends sailing her I feel ready and confident about moving her and myself to the marina and leave this land based house behind me. Now all I have to do is convice the insurance company, Boat U.S. that the radiator heater that I have for her is just as safe if not safer that a "marine" heater i.e. propane, diesel, or alcohol. type heaters.