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Seawolf-class submarine

Seawolf class
The USS Seawolf (SSN-21) underway
Class overview
Builders: General Dynamics Electric Boat
Operators:  United States Navy
Preceded by: Los Angeles class
Succeeded by: Virginia class
Cost: $3 billion per unit ($3.5 billion for USS Jimmy Carter)
Built: 1989–2005
In commission: 1997–present
Planned: 29
Completed: 3
Cancelled: 26
Active: 3
General characteristics
Type: Nuclear attack submarine
Displacement:

Surfaced: 8,600 tons

Submerged: 9,138 tons, 12,139 tons full, USS Jimmy Carter
Length: 353 ft (108 m)
Beam: 40 ft (12 m)
Propulsion:
  • 1 S6W PWR 45,000 hp (34 MW)
  • 1 secondary propulsion submerged motor
  • 1 shaft
  • 1 propeller
Speed:
  • 20 knots (37 km/h) (silent)
  • 35 knots (65 km/h) (maximum)
Range: unlimited
Endurance: Only limited by food supplies
Complement: 140
Crew: 14 officers; 126 enlisted
Armament: 8 × 660 mm torpedo tubes (50 Tomahawk (missile)/Harpoon (missile)/Mark 48 torpedo)

Surfaced: 8,600 tons

The Seawolf class is a class of nuclear-powered fast attack submarines (SSN) in service with the United States Navy. The class was the intended successor to the Los Angeles class. Design work began in 1983. At one time, an intended fleet of 29 submarines was to be built over a ten-year period, later reduced to twelve submarines. The end of the Cold War and budget constraints led to the cancellation in 1995 of any further additions to the fleet, leaving the Seawolf class limited to just three boats. This, in turn, led to the design of the smaller Virginia class. The Seawolf class cost about $3 billion ($3.5 billion for USS Jimmy Carter) making it the most expensive SSN submarine and second most expensive submarine ever after the French SSBN Triomphant class.

The Seawolf design was intended to combat the threat of large numbers of advanced Soviet Navy ballistic missile submarines such as the Typhoon class and attack submarines such as the Akula class in a deep ocean environment. Seawolf class hulls are constructed from HY-100 steel, which is stronger than the HY-80 steel employed in previous classes, in order to withstand water pressure at greater depths.

Compared to previous Los Angeles-class submarines, Seawolf submarines are larger, faster, and significantly quieter; they also carry more weapons and have twice as many torpedo tubes, for a total of 8. The boats are able to carry up to 50 UGM-109 Tomahawk cruise missiles for attacking land and sea surface targets. The boats also have extensive equipment to allow shallow water operations. The class uses the more advanced ARCI Modified AN/BSY-2 combat system, which includes a new, larger spherical sonar array, a wide aperture array (WAA), and a new towed-array sonar. Each boat is powered by a single S6W nuclear reactor, delivering 45,000 hp (34 MW) to a low-noise pump-jet.


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Wikipedia

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