keep an eye on the underwater length of the ramp. a few years ago we were launching a different keel boat, and the trailer wheels dropped off the end of the submerged concrete ramp. which then we had to go underwater to pry the wheels back up onto the ramp.
don't know what would be a good depth to float off depending on the angle of the ramp. will the trailer wheels have to hit 6 ft below water line or more?
v
