recently in a auto accident head on with my 16 ft open bow in tow boat slid two feet forward on trailer bending the winch mast and stretching all the tiedowns to limit trailer bounced two feet off the ground it is an older boat with a 140 horse merc io when i went to put in water leaked into bilge area right away. never had a problem with the boat taking on water before the accident what do i look for as far as damage caused by the accident as there is no obvios damage to hull thanks for you responses