The most common way to detect the source of leaks is the powder method. Try dusting non toxic baby powder in the suspected areas of water entry. The powder will show the invisible water trails, like fog on a mirror. Check around the portlights (windows), hatches, mast step, any place you can imagine water might find its place into the boat. Check your tanks, if there are any. Also, consider condensation... a concern in areas of high humidity. You'll want to make sure the interior stays ventilated to help with that. There are a few anti humidity devices available for boats. Browse through the chandlery catalogues for examples. Anyway, give the powder method a try,
That is the liner. The bump keeps your stuff from sliding into the deep unknown.
I guess what I'm trying to figure out is why is the bump "open" on my boat. If I'm looking down by the keel winch rubber tube, at the bottom, I can see a dark, black hole (2' diameter) that is the opening of this BUMP. I can't see into it more than a few inches, but its open space and worries me that in there, and also down under the fuel tank platform (which it seems the bump leads to), is just open space that could have water in it and just festering mold.... and there is no way to know or to clean it. Only paranoid because I have issues with mold and any mold in the air makes me really sick now. I normally wouldn't care and just not worry about it but....
