Kilo Class History




In Service



Russian Version

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This site is devoted to history of creation, construction and service of a submarine "ALROSA" of the Black Sea fleet, Russian Federation.

The submarine has been created on a experimental Project 877V (a diesel-electric submarine with a pump jet propulsion). Today this submarine is a part of 247-th Division of submarines of the Black Sea fleet (2 SSK), and actively participates in actions and the doctrines spent on fleet.


The Kilo Class (Project 877) submarine was designed for anti-submarine and anti-ship warfare in the protection of naval bases, coastal installations and sea lanes, and also for general reconnaissance and patrol missions. The Kilo is considered to be to be one of the quietest diesel submarines in the world. The submarine consists of six watertight compartments separated by transverse bulkheads in a pressurised double-hull. This design and the submarine's good reserve buoyancy lead to increased survivability if the submarine is holed, even with one compartment and two adjacent ballast tanks flooded. The foreplanes are positioned on the upper hull in front of the fin or sail. The command and control systems and fire control systems are located in the main control room which is sealed off from the other compartments.

The Russian fleet operates three variants of the Kilo 877: the basic 877; the 877K that has an improved fire-control system; and the 877M that has wire-guided torpedoes from two tubes. Export models, designated with an 'E' suffix, are generally similar though with some reduced features. A total of at least 26 and perhaps as many as 30 were built for the Russian navy, one of which was subequently exported to Iran. All the 30 Kilo-class submarines built for service with the Russian Navy are designated Project 877, although 15 of these are the earlier-developed 877EKM and 15 the later 636 versions.



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