In naval architecture, a poop deck is a deck that forms the roof of a cabin built in the rear, or stern, part of the superstructure of a ship.
Poop deck of a model of the Soleil-Royal, as seen from the forecastle
The quarterdeck is a raised deck behind the main mast of a sailing ship. Traditionally it was where the captain commanded his vessel and where the ship's colours were kept. This led to its use as the
Poop deck
…roof of the stern or "after" cabin, also known as the "poop cabin" (or simply the poop). On sailing ships, the helmsman would steer the craft from the quarterdeck, immediately in front of the poop deck. At the stern, the poop deck provides an elevated position ideal for observation. The cabin was also used as an…
Raised quarterdeck of an 18th-century frigate, between the main mast and the even higher poop deck at the stern.
Before helicopter decks became common, warships such as the Rothesay class often had a deck at the stern used for secondary armament.
Seaplanes were often operated from the quarterdeck of battleships, as here on USS Colorado
Quarterdeck of a Japanese warship. Note the watchstanders in uniform, the wooden plaque, and the proximity to the accommodation ladder.