I just did this project. I located the vent right below the rub rail. Where the vent comes up through the shelving in the cabin, I turned it towards the stern, poked it into the cabinet (where the plexiglass sliders are located) then out the hull. I read some older threads here where a couple of people had done this. Someone had mentioned you could put a clamshell cover over the vent thruhull facing the stern. The water flowing over the clamshell would prevent water getting into the vent when heeled way over. I figure I try it out this summer without the clamshell and see how it works.