he has taken water through the deck vent in a sea way. (I guess this could also happen with a heater vented to the deck as well, but with a less odoriferous result.) He lives aboard and likes not having the holding tank. He says it can have a little bit of an odor sometimes, but that he does not see it as much of a problem. I should mention that he is a bachelor and has never had another date with a woman after taking her to his boat.