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US Navy Columbia class Ballistic Missile Submarine - SSBN |
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| 11/25 |
| Units (12 planned): |
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SSBN 826 USS District of Columbia SSBN 827 USS Wisconsin SSBN 828 USS Groton |
| Specifications: |
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Builder: General Dynamics Electric Boat, Groton, Connecticut, USA (prime contractor) Huntington Ingalls Industries - Newport News Shipbuilding, Newport News, Virginia, USA (main subcontractor) Displacement: 20,810 long tons / 21,140 t (submerged) Length: 171 meters (560 ft) Beam: 13 m (43 ft) Speed: 20+ knots (37+ km/h) Complement: 155 Propulsion: 1 x Bechtel Marine Propulsion Corporation S1B pressurized water nuclear reactor Turbo-electric drive 1 shaft / 1 low-noise pump jet propulsor Armament: 16 x launching tubes for ballistic missiles for UGM-133A Trident II D5LE (life-extension) submarine-launched ballistic missile (SLBM) with up to 12 Mk-7 RV/W93 or W76 or W88 300-475 kilo-tons nuclear warheads range 4100 NM (7600 km) 4 x 21 inches (533 mm) torpedo tubes for Mk.48 heavy weight torpedo / ADCAP |
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The upcoming Columbia class are nuclear-powered ballistic missile
submarines of the United States Navy, designed to replace the Ohio
class. Construction of the first vessel began on 1 October 2020, and
is scheduled to enter service in 2031. On 3 June 2022, the Navy announced that the lead vessel of the class will be named USS District of Columbia (SSBN 826), because there is already an attack submarine named USS Columbia (SSN-771). Nevertheless, the Navy has since continued to refer to the class as Columbia. The Columbia class is to replace the Ohio class of ballistic missile submarines, whose remaining boats are to be decommissioned, one per year, beginning in 2028. The Columbia class will take over the role of submarine presence in the United States' strategic nuclear force. Electric Boat designed the new class with help from Newport News Shipbuilding. A total of twelve submarines are planned, and construction of the lead boat began in 2021. Each submarine will have sixteen missile tubes, each carrying one UGM-133 Trident II D5LE missile. (The ninth and later Columbias are to receive the upgraded D5LE2s.) |
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images for more images go to the individual ship's pages |
   December 2025  1st stern-section delivery    future SSBN 826 USS District of Columbia keel laying ceremony at GDEB Quonset Point facility, Rhode Island - June 4, 2022  GDEB infographic |
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