Yasen class submarine (Russian: ?????? 885 "?????", "ash tree"), also known as
the Severodvinsk class, is a new Russian nuclear multipurpose attack submarine
class. The submarine is based on the Akula-class submarine and the Alfa-class
submarines and are projected to replace Russia's older Soviet-era class attack
submarines both Akula class and Oscar class.
Construction on the first submarine started on December 21, 1993. In April
2010 it was reported that the 7 May launch of the first boat had been postponed
due to 'Technical Reasons'.On June 15 the first submarine was rolled out of its
building hall. Plans call for the submarine to be in service by late 2010 or
early 2011.