INS Kalvari (S23)

INS Kalvari (S23) was the lead vessel of the Kalvari-class submarine of diesel-electric submarines of the Indian Navy. The submarine was laid down on 27 December 1966 as Foxtrot-class submarine B-51 of the Soviet Navy by Novo-Admiralty at Galerniy Island, Leningrad. The submarine was launched on 15 April 1967 and competed on 26 September 1967. B-51 was transferred to the Indian Navy in July 1968. The submarine was removed from service in 1992.