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Kilo class

Patrol submarine

Kilo class submarine

The Kilo class diesel-electric patrol submarine has achieved respectable export sales

Country of origin Soviet Union
Entered service 1982
Crew 52 men
Diving depth (operational) 240 m
Diving depth (maximum) 300 m
Sea endurance 45 days
Dimensions and displacement
Length 73.8 m
Beam 9.9 m
Draught 6.6 m
Surfaced displacement 2 325 tons
Submerged displacement 3 076 tons
Propulsion and speed
Surfaced speed 10 knots
Submerged speed 17 knots
Diesel engines 2 x 3 650 hp
Electric motors 1 x 5 900 hp
Missiles 8 x SA-N-8 'Gremlin' or SA-N-10 'Gimlet' SAM missiles
Torpedoes 6 x 533 mm torpedo tubes for 18 torpedoes
Other up to 24 mines in place of torpedoes


   The Project 877 or Platus diesel-electric submarine, better known in the West as the Kilo class, was designed in the early 1970s for the anti-submarine and anti-ship defense of Soviet naval bases, coastal installations and sea lanes, and also for the patrol and surveillance tasks. First delivered from the shipyard at Komsomolsk in eastern Siberia, but then built in the western USSR at Nizhny Novgorod ant the Admiralty Yard in Leningrad (now St. Petersburg), the boat is of the medium-endurance type and the first example was launched in 1979 for completion in 1982.

   Some 24 Kilos were built for the Soviet Navy, and by the first part of the 21st century the Russian Navy had deleted 15 of these, leaving it with nine boats with the Northern and Pacific Fleets (three and four respectively), and single boats with the Baltic and Black Sea Fleets, the latter's boat having been modified with pumpjet propulsion.

   In design the Kilo class is a development of the Tango class with an improved hull form. Even so, the boat can be considered only basic by comparison with contemporary Western submarines.

   The Kilo class has achieved respectable export sales. These boats have been exported to Algeria (2), China (12), India (10), Iran (3), Poland (1) and Romania (1), some of them are project 636 Varshavyanka class boats (also referred as Improved Kilo class) with improved propulsion and fire-control systems.




   Project 877K, with improved fire control.

   Project 877M, with provision for wire-guided torpedoes from two tubes.

   Project 4B, with uprated diesels. It is slightly longer and fitted with an automated data system to provide fire-control data for two simultaneous interceptions. Its electric motor is turning more slowly for less noise.

   Project 636 Varshavyanka (Improved Kilo class) with improved propulsion and fire-control systems.

   Lada class, improved version of the Kilo, fitted with air-independent propulsion system and new combat systems. The lead boat was laid down in 1997 and commissioned with the Russian Navy in 2010. However it turned out that this project was a complete failure. The lead boat had a number of major issues. Follow-on boats were extensively redesigned.



Kilo class submarine

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Kilo class submarine

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