society > travel > travel by water > vessel, ship, or boat > parts of vessels > part of vessel above water > [adverb] (4)
Nautical. At the higher part of a vessel, rather than on deck; esp. on or around the masts, rigging, or upper yards of a vessel. Also: on deck, as…
On the top. Also figurative. Frequently with reference to the upper deck of a ship. Also, to the top, and in form topsides. colloquial.
Military slang. Above decks.