Soviet frigate Bditelnyy

Bditel'nyy or Bditelnyy (Бдительный, "brisk") was a Soviet Navy 1135 Burevestnik-class Large Anti-Submarine Ship (Большой Противолодочный Корабль, BPK) or Krivak-class frigate.

Design
Bditelnyy was the first Project 1135 ship laid down. Displacing 2835 t standard and 3190 t full load, the vessel was 123 m in length. Power was provided by a combination of two 18000 hp M3 and two 6000 hp M60 gas turbines, driving two fixed pitch screws, for a design speed of 32 kn.

The ship was designed for anti-submarine warfare around four URPK-3 Metel missiles (NATO reporting name SS-N-14 'Silex'), backed up by 533 mm torpedoes and a pair of RBU-6000 213 mm anti-submarine rocket launchers. The main armament was upgraded to URPK-5 Rastrub (SS-N-14B) between 1984 and 1986.

Service
Bditelnyy was commissioned with the Baltic Fleet on 20 February 1971 as part of the 128th Brigade. Designated a Guard Ship (Сторожевой Корабль, SKR) from 28 July 1977, the ship was decommissioned on 31 July 1996.