PD-50, Soviet designation Project 7454, was a Russian large floating dry dock built at the Götaverken Arendal shipyard in Gothenburg, Sweden and commissioned in the 1980s. At the time, it was the world's largest floating dry dock and used primarily to service the ships and submarines of the Northern Fleet.

Pyotr Velikiy is the fourth Kirov-class battlecruiser of the Russian Navy. She was initially named Yuri Andropov after Yuri Andropov, the former General Secretary of the Communist Party, but the ship's name was changed after the fall of the Soviet Union. The Russian designation for the type is "heavy nuclear-powered guided missile cruiser", but Western defense commentators have resurrected the term "battlecruiser" to describe them, as they are the largest surface "line of battle" warships in the world. Pyotr Velikiy is the flagship of the Northern Fleet.