Plenty a women go topless at the beach - why would it be any different out on the water in a boat?
Heck Olive Oyl in her glory days (before 3 kids and her boobs became razor strops)
used to catch a few rays as we toured across the top end of the northern territiory. Eventually - she gave it up, due to the number of 18 wheelers that used to run off the road just after they passed us going in the opposite direction!
Olive would make me promise to wake her up if I saw a cattle train approaching, so she could cover up - because she would 'snooze' to pass the long hours on the road.
Course - I never used to wake her up until the track was already passed!
Was always funny to watch the road train drivers eyes bug out, and do the double take, heck some of em would pull off for a rest rubbing their eyes thinking they musta been hallucinating!. he he he
Sooo - why would ayone object to au natural on a boat is beyond me...
Course - could be kinda uncomfortable in any sorta decent chop maybe! Hate to see her get bruised kneecaps and black eyes!
She has my vote!