What are the rules for the use of 'in' or 'on', in a nautical environment.
Does one sail in a ship, or on a ship. Does the rule change for crew?
Are there other circumstances where the rule applies?
Quote: The vessel did touch at Elba, where he quitted it, and passed a whole day in the island.
(p56, The Count of Monte Cristo, Dumas A, Vintage, London, 2009.)