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Bellona Report nr. 2:96. Written by: Thomas Nilsen, Igor Kudrik and Alexandr Nikitin.

Project 945, 945 A, 945 B (Mars) - Sierra Class

Drawing of 945, 945 A, 945 B (Mars) - Sierra
Northern Fleet Pacific Fleet Total
In service 6 0 6
Inactive 0 0 0
Dismantled 0 0 0
Number 6

Technical Data

Length: 112.7 m Displacement: 5 200/ 6 800 tons
Beam: 11.2 m Maximum Depth: 800 m
Draught: 8.5 m Hull: Titanium alloy
Speed: 35 knots Crew: 60

Compartments: 7


One pressurised water reactor, same model as that used in Project 971 (Akula) generating a power of 47 000 hp. Uses the same type of reactor as that on the Mike class submarine Komsomolets with a power capacity of 190 MWt. Reactor core is model OK-650.

Nuclear Weapons

One SS-N-21 cruise missile. SS-N-15 depth charge and SS-N-16 missile.

Naval Architects

Construction Company-112, Lazurit, N.I. Kvasya.

Construction Yard

The hull was built in Nizhny Novgorod at the factory Krasnoye Soromovo from 1982 until 1993. From here the submarines were towed in dock via inland waterways to Severodvinsk where construction and testing were completed.


The Sierra class submarines are based in Ara Bay at Vidyayevo Naval Base. At the present time, the submarine Barracuda is undergoing repairs and modernisation at Severodvinsk.


It is maintained that the Sierra class submarines are so quiet that they cannot be detected by NATO's tracking system SOSUS.[239]

Individual Submarines

Laid down on May 8, 1982. Launched in July 1983 and commissioned on September 21, 1984. On February 11, 1992, Barracuda collided with the American submarine Baton Rouge just off Kildin Island near the Kola Coast. After the collision, the submarine returned to base, but it was later transferred to Zvezdochka Shipyard in Severodvinsk for upgrades, maintenance and repair. As of April 1995, Barracuda was still at the shipyard in Severodvinsk.
Laid down in August 1983. Launched in April 1984 and commissioned in 1986.
Carp. Laid down in April 1984. Launched in June 1986 and commissioned in 1987.
Crab. Laid down in June 1986. Launched in June 1988 and commissioned in 1990.
Zubatka. Laid down in June 1988. Launched in May 1990 and commissioned in 1992.
Okun. Laid down in May 1990. Launched in June 1992 and commissioned in 1993.

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[239] Na Stasye Zapolyariya, April 22, 1995. Return

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CD-version, updated 1997-09-28

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