i got a couple of guesses but i'm pretty sure none of them are right and yes i'm wondering about the wood as well, i thought it was a leak
maybe the sun and the rain by madness, though doesn't have a lot to do with a sailingboat if anything
or sailing round the room by emmylou harris?
or maybe cold rain by bloodflowers?
or if you were a sailboat by Katie Melua?
But none of them satisfy me cause they don't have all the clues from your picture, so i guess i continue to look further