Soviet helicopter carrier Leningrad

Preceded by Moskva, there were no further vessels built, reportedly due to the poor handling of the ships in rough seas.

They were designed primarily as anti-submarine warfare (ASW) vessels, and her weapons and sensor suite was optimized against the nuclear submarine threat.

A "Mare Tail" variable depth sonar worked in conjunction with heliborne sensors to hunt submarines.

Between 4 August and 14 October 1974 she was the flagship for the detachment of ships in the Suez Canal mine clearance operation.

[2] Leningrad participated in the rescue operations for the Soviet submarine K-19 in the North Atlantic between February and March 1972.

A port-quarter fantail view of Leningrad