Attack Submarines
General Characteristics, Seawolf class

Builders: General Dynamics Electric Boat Division.
Power Plant: One nuclear reactor, one shaft
Length: 353 feet (107.6 meters)
Draft: 35 feet (10.67 meters)
Beam: 40 feet (12.2 meters)
Displacement: 8,060 tons (8,189.35 metric tons) surfaced; 9,150 tons (9,296.84 metric tons) submerged
Speed: 25+ knots (28+ miles per hour, 46.3+ kph)
Armament: Tomahawk missiles, MK-48 torpedoes, eight torpedo tubes
Crew: 13 Officers, 121 Enlisted
Ships:

USS Seawolf (SSN 21), Groton, Ct.
USS Connecticut (SSN 22), Groton, Ct.
USS Jimmy Carter (SSN 23), (under construction)

General Characteristics, Los Angeles 688 class

Builders: Newport News Shipbuilding Co.; General Dynamics Electric Boat Division.
Power Plant: One nuclear reactor, one shaft
Length: 360 feet (109.73 meters)
Beam: 33 feet (10.06 meters)
Displacement: Approx. 6,900 tons (7010.73 metric tons) submerged
Speed: 20+ knots
Crew: 13 Officers, 121 Enlisted
Armament: Four 21-inch torpedo tubes; Tomahawk cruise missiles, MK-48 ADCAP torpedoes, mines
Ships:

USS Los Angeles (SSN 688), Pearl Harbor, Hawaii
USS Philadelphia (SSN 690), Groton, Conn.
USS Memphis (SSN 691), Groton, Conn.
USS Bremerton (SSN 698), San Diego, Calif.
USS Jacksonville (SSN 699), Norfolk, Va.
USS Dallas (SSN 700), Groton, Conn.
USS La Jolla (SSN 701), Pearl Harbor, Hi.
USS City of Corpus Christi (SSN 705), Groton, Conn.
USS Albuquerque (SSN 706), Groton, Conn.
USS Portsmouth (SSN 707), San Diego, Calif.
USS Minneapolis-St. Paul (SSN 708), Norfolk, Va.
USS Hyman G. Rickover (SSN 709), Norfolk, Va.
USS Augusta (SSN 710), Groton, Conn.
USS San Francisco (SSN 711), Norfolk, Va.
USS Houston (SSN 713), San Diego, Calif.
USS Norfolk (SSN 714), Norfolk, Va.
USS Buffalo (SSN 715), Pearl Harbor, Hawaii
USS Salt Lake City (SSN 716), San Diego, Calif.
USS Olympia (SSN 717), Pearl Harbor, Hawaii
USS Honolulu (SSN 718), Pearl Harbor, Hawaii
USS Providence (SSN 719), Groton, Conn.
USS Pittsburgh (SSN 720), Groton, Conn.
USS Chicago (SSN 721), Pearl Harbor, Hawaii
USS Key West (SSN 722), Pearl Harbor, Hawaii
USS Oklahoma City (SSN 723), Norfolk, Va.
USS Louisville (SSN 724), Pearl Harbor, Hawaii
USS Helena (SSN 725), San Diego, Calif.
USS Newport News (SSN 750), Norfolk, Va.

General Characteristics, Los Angeles (Improved) 688-I class

Builders: Newport News Shipbuilding Co.; General Dynamics Electric Boat Division.
Power Plant: One nuclear reactor, one shaft
Length: 362 feet
Beam: 33 feet
Displacement: Approx. 7,147 tons (7185 metric tons) submerged
Speed: 25+ knots
Crew: 13 Officers, 121 Enlisted
Armament: 12 VLS tubes, four 21-inch torpedo tubes; MK-48 ADCAP torpedoes, Tomahawk cruise missiles, mines.
Ships:

USS San Juan (SSN 751), Portsmouth, NH.
USS Pasadena (SSN 752), Pearl Harbor, Hawaii
USS Albany (SSN 753), Norfolk, Va.
USS Topeka (SSN 754), Pearl Harbor, Hawaii
USS Miami (SSN 755), Groton, Conn.
USS Scranton (SSN 756), Norfolk, Va.
USS Alexandria (SSN 757), Groton, Conn.
USS Asheville (SSN 758), Pearl Harbor, Hawaii
USS Jefferson City (SSN 759), San Diego, Calif.
USS Annapolis (SSN 760), Groton, Conn.
USS Springfield (SSN 761), Groton, Conn.
USS Columbus (SSN 762), Pearl Harbor, Hawaii
USS Santa Fe (SSN 763), Pearl Harbor, Hawaii
USS Boise (SSN 764), Norfolk, Va.
USS Montpelier (SSN 765), Norfolk, Va.
USS Charlotte (SSN 766), Pearl Harbor, Hawaii.
USS Hampton (SSN 767), Norfolk, Va.
USS Hartford (SSN 768), Groton, Conn.
USS Toledo (SSN 769), Groton, Conn.
USS Tucson (SSN 770), Pearl Harbor, Hawaii
USS Columbia (SSN 771), Pearl Harbor, Hawaii
USS Greeneville (SSN 772), Pearl Harbor, Hawaii
USS Cheyenne (SSN 773), Pearl Harbor, Hawaii

General Characteristics, Benjamin Franklin Class

Builders: Mare Island Naval Shipyard; General Dynamics Electric Boat Division
Power Plant: One nuclear reactor, one shaft
Length: 425 feet
Beam: 33 feet Displacement: Approx. 8,250 tons (8,382.4 metric tons) submerged
Speed: 20+ knots
Crew: 13 Officers, 107 Enlisted
Armament: Four torpedo tubes; MK-48 Torpedoes
Ships:

USS Kamehameha (SSN 642) (ex-SSBN 642), Pearl Harbor, Hawaii
Designed to seek and destroy enemy submarines and surface shipping, the U.S. Navy's nuclear-powered attack submarines (SSNs) are highly capable, multi-mission platforms.  These submarines remain the most effective anti-submarine warfare (ASW) platforms available to counter advanced diesel and nuclear-powered submarines operated by potential adversaries.
Since the end of the Cold War, increased emphasis has been placed on non-ASW missions.  Today's attack submarines, aided by improved communications capabilities, conduct intelligence, surveillance, and reconnaissance mission to provide timely intelligence on the world's trouble spots to senior U.S. policymakers.  The SSN has unparalleled capabilities to insert special operations forces and conduct mine warfare without being detected.

Typically two attack submarines are assigned to each carrier battle group to provide force protection.  They also carry about 20 percent of each battle group's Tomahawk land attack cruise missiles.  The attack submarine's stealth and unlimited endurance allows them to operate with near impunity in forward areas. They can transit at high speed, and arrive on station undetected and ready for action.
The current backbone of the U.S. Navy's attack submarine force is the fast, heavily armed LOS ANGELES class submarine.  A total of 62 submarines of this class were built.  The first 31 carry 25 torpedo tube launched weapons including MK-48 torpedoes and 12 Tomahawk cruise missiles.  The next 31 submarines of the LOS ANGELES class carry 12 Tomahawk vertical launch tubes in addition to the armament noted above.  Twenty-three of these, called "Improved 688's," are quieter, incorporate advanced combat systems, and are configured with bow planes and a reinforced sail for under-ice-operations.
The Navy began building the SEAWOLF class attack submarine in the late 1980s.  They are the fastest, quietest, and most heavily armed attack submarines in the world.  The first of the class, USS SEAWOLF (SSN-21) completed its initial sea trials in July 1996 and was commissioned in September 1996.  The second ship of the class, USS CONNECTICUT (SSN-22), was commissioned in December 1998.  In 1992, following the end of the Cold War, the class was truncated to three ships in order to pave the way for a more affordable class of submarine --the VIRGINIA (SSN-774) class attack submarine. 

The SEAWOLF class was engineered for maximum design flexibility and is able to incorporate new technologies as they are developed.  They are designed to dominate the battle space across a broad spectrum of warfare missions in the littoral and open ocean areas.
Los Angeles-class submarine operating with the Carrier Task Force
The U.S. Navy's most advanced attack submarine USS Seawolf (SSN-21)
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