The Russian Navy will receive a second Graney class nuclear-powered multipurpose attack submarine in 2015, a spokesman for the Malakhit design bureau said.
The construction of the Kazan submarine at the Sevmash Shipyard in the northern Russian city of Severodvinsk began in 2010. The first vessel of the Graney class, the Severodvinsk submarine, will enter service by the end of 2011.
"The hull of the Kazan sub has been built, but we still have to make many upgrades compared with the first vessel in the series. We are planning to deliver the submarine to the Navy in 2015," the official told RIA Novosti on Tuesday.
The Kazan will feature more advanced equipment and weaponry than the Severodvinsk, which has been under construction since 1993.
Graney class nuclear submarines are designed to launch a variety of long-range cruise missiles (up to 3,100 miles or 5,000 km), with conventional or nuclear warheads, and effectively engage submarines, surface warships and land-based targets.
The submarine's armament includes 24 cruise missiles and eight torpedo launchers, as well as mines and anti-ship missiles.