Seawolf-Class Submarine (SSN-21)

Full Specifications

Seawolf-Class Nuclear Attack Submarine (SSN-21)

The Seawolf-class represents one of the most advanced and formidable nuclear-powered attack submarines ever built by the United States Navy. Designed during the late Cold War by General Dynamics Electric Boat, the Seawolf-class (SSN-21) was engineered to dominate deep-ocean warfare against the Soviet Union’s most advanced submarines. Though conceived for large-scale underwater conflict, its superior stealth, endurance, and firepower ensure continued relevance in 21st-century naval operations.

Powered by a S6W nuclear reactor, the Seawolf-class boasts extraordinary underwater performance—capable of exceeding 35 knots (40 mph) while remaining nearly undetectable. The submarine’s double-hull titanium structure and advanced sound-dampening technologies make it one of the quietest submarines ever constructed.

Armed with eight 660 mm torpedo tubes, it can deploy up to 50 weapons, including Mk-48 ADCAP torpedoes and UGM-109 Tomahawk cruise missiles. Its combat system integrates advanced sonar arrays, including the BQQ-10 system, capable of detecting distant threats with unmatched precision.

Although initially planned for 29 boats, the program was curtailed after the Cold War, resulting in only three units—USS Seawolf (SSN-21), USS Connecticut (SSN-22), and USS Jimmy Carter (SSN-23). The latter features a multi-mission platform for special operations and undersea intelligence gathering.

The Seawolf-class remains a strategic deep-water deterrent, capable of tracking enemy submarines, launching precision strikes, and supporting covert missions—hallmarks of U.S. maritime supremacy.

Seawolf-Class Price

Each Seawolf-class submarine reportedly costs around $3 billion USD, reflecting its advanced nuclear systems, acoustic quieting, and multi-mission capabilities—making it one of the most expensive yet capable submarines in the world.