Russian submarine Kazan (Yasen class)

Kazan is a Russian nuclear attack submarine of the Yasen-class submarine. It is the second boat of the project; as from the first it is separated by 16 years (1993-2009) considerable changes are made to its design.

Building history
The submarine project has been developed in the "Malachite" design office in Saint Petersburg. The Russian navy has declared that the submarine will be improved in comparison with Severodvinsk, the first of the Yasen-class submarines. According to Moscow Defense Brief editor Mikhail Barabanov, the Yasen class will not enter serial production, so Kazan appears to be a more affordable replacement. Differences in the project have appeared sufficient to consider it as a new updated version (Yasen-M Ясень-М).

Admiral Vladimir Vysotsky stated that work on a second Yasen-class submarine had been started on 24 July 2009.