Work as a deckhand on a superyacht. The responsibilities of a deckhand include cleaning, varnishing and painting, polishing, tender operations (small-boat handling skills required) and working the lines/ropes. This is a hard work position with long hours, but can have the added benefit of substantial tips on the larger and busier charter vessels.

Typical salary can be found here: http://www.superyacht-crew-academy.com/salaries_superyacht_c...

I work on a 78ft yacht in the Med, (http://www.camperandnicholsons.com/sales/search/-/page/sales...), PM me if you want more details about this kind of work.