sealing

I just purchased a 1982 O'Day 19. There was about a half gallon of water sloshing around the inside cabin floor. There have been heavy rains lately here and one of the windows in the hatch cover has a small leak, so some sealant is in order, but I wonder if there is something I should do to...

Gentlemen, before I tear out the rear panel, take out the holding tank and/or the starting battery and all the wiring, maybe one of you can save me a quite a bit of time and help me with an issue. For the stern rails on the Hunter 260 (mine is a 2004), they are attached to the boat via circular...

I see on my deck what look like SS covers over the chainplates where they enter the deck. How do I remove these so that I can seal under them? Thanks! John