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B-138 Obninsk

B-138 Obninsk. 4bos.net.ru

B-138 Obninsk is a Project 671RTMK Schuka nuclear-powered attack submarine (SSN).


Northern Fleet, Zaozersk


The submarine was laid down on December 17, 1988 at Admiralteysky Zavod shipyard (Leningrad); launched on August 5, 1989; commissioned into Northern Fleet on February 28, 1991 under the name of K-138; renamed into B-138 on June 3, 1992; obtained the name of Obninsk on May 5, 2000 being taken under patronage of Obninsk town administration.


In 1991 the sub won the Navy Commander's Prize for attack of a task force and was titled "excellent submarine" at the year end.

In 1992 the sub was second in the Navy Commander's Prize contest and was titled "excellent submarine" at the year end.

In 1997, 1998 the sub took part in Northern Fleet's integrated exercise.

As of 2008, the sub was in service.


NATO classification: Victor-III
Surface speed: 11.6 knots
Submerged speed: 31 knots
Operating depth: 400 meters
Test depth: 600 meters
Endurance: 80 days
Crew: 96 men


Surface displacement: 6,990 tons
Submerged displacement: 7,250 tons
Extreme length (on design waterline): 107.1 meters
Extreme beam: 10.8 meters
Mean draft (on design waterline): 7.8 meters


Two VM-4 type water-cooled and water-moderated reactors, turbine-geared propulsion unit GTZA-615, total power is 31,000 shp. One shafting line, multi-blade screw, 2 x 375 shp auxiliary motors.


2 x 650-mm and 4 x 533-mm torpedo tubes