Project 949A (Antey)
K-148 Orenburg (August 1985), K- 132 Irkutsk (March 1986), K-119 Voronezh(December 1987), K-173 Krasnoyarsk (January 1989), K-410 Smolensk ( December 1989), K-442 Chelyabinsk (January 1990), K-456 Viliuczinsk (December 1991), K-266 Orel (22 May 1992), K- 186 Omsk (8 May 1993), K-141 Kursk (May 1994), K-512 Tomsk (18 July 1995), K-530 Belgorod (May 1998)
Displacement: 14,700 tons (surfaced), 24,000 tons (submerged)
Dimensions: 505930 x 59980 x 30920
Machinery: 2 OK-650b pressurized water reactors, 2 geared steam turbines, 2 shafts. 100,000 shp = 15/30 knots
Endurance: 50 days
Armament: 24 x P-700 antiship missiles, 4 x 533mm torpedo tubes, 4 x 650mm torpedo tubes (all bow), total 28 torpedoes
Notes: These boats were slightly longer than the earlier Project 949 submarines, to allow more extensive rafting of machinery in order to reduce their acoustic signature. Three additional boats were not completed. The Kursk sank after an accident on 12 August 2000 about 100 miles from Murmansk. By 2006 about six of the class remained in active service, with the remainder laid up in reserve.
Eleven Project 949A Antey submarines were completed at Severodvinsk, of which five were assigned to the Soviet Northern Fleet.
At one stage it had been planned to develop a new fourth-generation follow-on to the Project 949A, but this plan was later scrapped.
The external differences between the two classes were that the 949A class is about 10 metres (33 ft) longer than its predecessor (~154 metres (505 ft) rather than 143 m (469 ft)), providing space for improved electronics and possibly quieter propulsion. Some sources speculate that the acoustic performance of the Oscar II class is superior to early Akula class submarines but inferior to the Akula II as well as subsequent (4. generation) designs. It also has a larger fin, and a seven-bladed propeller instead of a four-bladed one.
Like all post-World War II Soviet designs, they are of double hull construction. Similarly, like other Soviet submarine designs, Project 949 not only has a bridge open to the elements on top of the sail but, for use in inclement weather, there is an enclosed bridge forward and slightly below this station in the fin/sail.
A distinguishing mark is a slight bulge at the top of the fin. A large door on either side of the fin reaches this bulge. These are wider at the top than on the bottom, and are hinged on the bottom. The Federation of American Scientists reports that this submarine carries an emergency crew escape capsule; it is possible that these doors cover it. The VSK escape capsule can accommodate 110 people.
The Oscar Class is commonly referred to as Mongo by crews of US patrol aircraft in reference to their massive size.
In December 2012, construction began on a special purpose research and rescue submarine, designated project 09852, and allegedly based on project 949A (Oscar II class) submarines. The submarine is designed to carry smaller submarines. Some sources speculated that the boat being built/modified is actually the incomplete “Belgorod”. However, another source gave a different account stating that the boat is similar to AS-31 Losharik, a far smaller special purpose submarine.