Rezkiy (Russian: Резкий, "Sharp") was a Project 1135M Large Anti-Submarine Ship (Большой Противолодочный Корабль, BPK) or Krivak-class frigate of the Soviet Navy. With an armament based around the URPK-4 Metel anti-submarine missile system, the vessel was launched on 17 February 1975. Joining the Pacific Fleet on 2 February the following year, the ship operated primarily in the Indian Ocean, including visits to Ethiopia, India and Mauritius. The vessel was also involved in tracking the cruisers USS Arkansas and USS Fox, as well as searching for a submarine that crossed the Soviet anti-submarine barrier in 1980. In 1981, the vessel sailed as part of a task force along the west coast of the United States to test and measure American defences. After the dissolution of the Soviet Union, the sh