I'm not going to lie to you, that was pretty awesome. Well, it was very good. The concept was pretty awesome.
My only criticism is that I'd prefer really exaggerated accents. I'd make the deckhand guy sound like such a cockney retard that even people from the worst parts of the UK couldn't understand him, and I'd go as far with the pirate accent as I could handle while singing.
I still liked it, though. Nice work.