The submarine, known worldwide as KILO (NATO classification), belongs to the third generation of diesel-electric submarines. The modified 636 Project vessel has a higher combating effectiveness as compared with previously built warships.
Admiralty Shipyards (Admiralteysky Verfy), the oldest Russian shipbuilder (founded in 1704), is part of Western Center of Shipbuilding of United Shipbuilding Corporation. The Shipyard specializes construction of submarines. To date, the Company has built more than 300 submarines (including 41 nuclear-powered warships), 68 deep and underwater vessels.