Project 945A Sierra II Class Submarine Pskov has Faulty Auxiliary Engine Replaced Sunday, 4 February 2018 Army, Defence, Military, News, World The Project 945A B-336 Sierra II class nuclear-powered attack submarine (SSN) Pskov armed with missiles and torpedoes had its faulty auxiliary diesel engine replaced with a standby one, the Northern fleet told FlotProm online publication. Read More Read More Tweet Subscribe to receive free email updates: