The Krivak class, Soviet designation Project 1135 Burevestnik (storm petrel), are a series of frigates and guard ships (patrol boats) built in the Soviet Union primarily for the Soviet Navy since 1970. Later some sub-branches, like the Nerey (Nereus) were designed for coastal patrol by the KGB Border Troops. Until 1977, the ships in the class were considered to be large anti-submarine warfare vessels.
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