Submarine nine years stood at the dock waiting for repair enterprise. Large-scale modernization works have begun on "Kaluga" in the past year.
Diesel-electric submarines "Kaluga"Was built in 1989 at the" reddish Sormovo "in Nizhny Novgorod. Initially Submarine came into the battle with the Black Sea Fleet, and then relocated to the North. It belongs to a class of "Kilo" / by ordering NATO / or "Varshavyanka." Submarine CDB is designed in Marine Engineering "Rubin" in St. Petersburg. These subs have a surface displacement — 2 thousand 300 tons, length — 73 meters, the speed submerged — 18 knots / approximately 33 km / hour / full autonomy — 45 days immersion depth — 300 meters, the crew — 52 people, standard weapons 6 torpedo tubes 533 mm.
"Star", which specializes in the repair and disposal of nuclear submarines, has extensive experience of modernization and diesel submarines. Since 1997, the Severodvinsk shipyard has upgraded the stocks to own for four Diesel-electric submarines for the Indian Navy and is working on the fifth submarine. The company also provides repair and modernization of similar submarine in her home — Indian port Vizakhapatnam.