Svirepyy (Russian: Свирепый, "Ferocious") was a Project 1135 Burevestnik-class Large Anti-Submarine Ship (Большой Противолодочный Корабль, BPK) or Krivak-class frigate that served with the Soviet Navy. Displacing 3,200 tonnes (3,100 long tons; 3,500 short tons) full load, the vessel was built around the Metel anti-submarine missile system. The ship was launched on 27 January 1971 in Kaliningrad and joined the Baltic Fleet. The ship's service was not restricted to the Baltic Sea and instead travelled widely, visiting a number of foreign friendly ports during the next two decades, including Gdynia, Poland and Havana, Cuba. Svirepyy was designated a Guard Ship (Сторожевой Корабль, SKR) from 1977 as Soviet strategy changed to one creating safe areas for friendly submarines close to the coast.