it's very simple really.....
step 1 - find the radio frequency which the captain of the ship can be contacted on
step 2 - politely request that the ship be turned into the wind
step 3 - ask for the stern doors be opened (again, politely of course)
step 4 - request that some crew members clear one of the car decks (note: if things were going really well, you could possibly get someone to use some car head-lights as a kind of APAI system)
step 5 - land on the cleared car deck
....there you go, landed and hangered in one go and you're up the stairs to the bar. I'm surprised that it was necessary to have to explain this method, or is the PPL course in the UK different to the one here in Ireland?