There's water in a storage under the bow cushion. There's no drain to bilge so I have to bail about a gallon a season. After hard rain there's a coffee cup full in there. Cushions aren't wet so it's getting in from topsides and not overhead. Fresh water fill pipes through there but those don't seem to leak. The anchor locker is above as well as a bunch of railings. I'm baffled as to where to start caulking. Or if that's even a good idea?