The submarine stood for nine years at the pier of the enterprise, waiting for repair. Large-scale modernization work began on Kaluga last year.
Diesel submarines "Kaluga" was built in 1989 year at the factory "Red Sormovo" in Nizhny Novgorod. First, the submarine was part of the Black Sea Fleet, then redeployed to the North. It belongs to the “Kilo” class / according to the NATO classification / or “Varshavyanka”. The submarine was designed at the Central Design Bureau of Rubin marine technology in St. Petersburg. Such submarines have a surface displacement - 2 thousands of 300 tons, length - 73 meters, speed submerged - 18 knots / approximately 33 km / h /, full autonomy - 45 days, depth - 300 meters, crew - 52 person, standard weapons : 6 torpedo tubes caliber 533 mm.
The asterisk, specializing in the repair and disposal of nuclear submarines, has extensive experience in modernization and diesel submarines. Since 1997, the Severodvinsk shipyard has upgraded four diesel-electric submarines at the slipway on the order of the Indian Navy and is working on the fifth submarine. The company also provides repair and modernization of such a submarine at its home base - the Indian port of Vizakhapatnam.