How far down is the waterline, from gunwale at different points (center line of bow, transom, down 1/2 length of boat), on a 1965 MFG Westfield? My hull is original gelcoat never painted. I'm going to keep this boat in brackish water and need to put ablative paint on and would like to do this without putting in the water to "find" the water line. For gear/motor weight reference, we will have a 75hp 2 cycle , about 225lbs, and no other regular equipment, only 4 seats. thanks for any help.