No, but I have worked on very rich peoples yachts in the south of France, US and the Carribean (by yachts I mean 100+ metres with helicopters etc). Money is much better, all tax free, went to some amazing places and had a shed load of money at the end of it, but it is long hours and alot is expected.
There is even an acadamy for training crew for superyachts which I believe the engineering course is run by the Royal Navy. Try the following link (not cheap though). A yachtmaster certificate would give you a head start aswell. Or just turn up to one of the crew agencyies in Antibes at the begining of the season and get some deckhand work
http://www.flagshiptraining.co.uk/content/default.asp?PageId=495
Did it for a couple of years and gotta admit it was a good laugh