The phrase "aft deck" is correct and usable in written English.
It is typically used in nautical contexts to refer to the rear part of a ship or boat where people can gather or relax.
Example: "We enjoyed a beautiful sunset while sitting on the aft deck of the yacht."
Alternatives: "stern deck" or "rear deck."
The guests sit there on the aft deck.
Its cargo was stacked high on its aft deck and under tarps.
"Everybody has learned from Nike," said Mr. de Pestel, as he relaxed with a double espresso on the aft deck.
"He walked up on the aft deck in board shorts and a T-shirt – standard super-rich attire, as casual as you can be," she says.
The aft deck of a fully laden crude carrier is only 10 to 13 feet above the surface of the sea.
The compact boat accommodates a kitchen, lounge, three cabins and two bathrooms, an aft deck, a sun deck and a spacious wheelhouse.
Through five decades of Alaska Marine Highway tradition — the ferry line was founded in 1963, only four years after Alaskan statehood — the open expanse on two aft decks has gained a kind of mystique among many Alaskans I met on board and in my later travels.
This was necessary because the aft decks of earlier designs were usually awash when steaming at high speed, even in calm seas.
To help guard against this impression Missouri was placed well back from and facing the Arizona Memorial, so that those participating in military ceremonies on Missouris aft decks would not have sight of the Arizona Memorial.
The Hansa Rendsburg is somewhere in between these extremes, though tomorrow the entire ship's company is gathering in medieval fashion to barbecue a whole suckling pig on the aft-deck, a regular mid-ocean treat.
As he spoke after lunch on the aft missile deck, a topside rover was on patrol, cradling an M-16.
