Ohio Class SSGN

Ohio Class SSGN (Guided Missile Submarine, Nuclear-powered) – 4 units

SSGN-726 – Ohio – Commissioned: 1981 – №: 1 – Homeport: Bangor

SSGN-727 – Michigan – Commissioned: 1982 – №: 2 – Homeport: Bangor

SSGN-728 – Florida – Commissioned: 1983 – №: 3 – Homeport: Kings Bay

SSGN-729 – Georgia – Commissioned: 1984 – №: 4 – Homeport: Kings Bay

Displacement: surfaced – 16,764 tons; submerged: 18,750 tons

Length: 170 m; Beam: 13 m; Draft: 12 m

Propulsion: S8G reactor, 2 turbines 60,000 hp (45 MW), auxiliary motor 325 hp (242 kW)

Speed surfaced: 12 knots (22 km/h)

Speed submerged: official – 20 knots (37 km/h); reported – 25 knots (46 km/h)

Range: Limited only by food supplies

Test depth: official – 240 m; reported – 550 m

Complement: 15 officers, 140 men

Sensors and processing systems: BQQ-6 passive bow-mounted array (which includes BQS-13 fire control array); BQR-19 navigation; TB-16 or BQR-23 towed array; BQR-25 conformal array

Armament:

4× 21 in (533 mm) Mark 48 torpedo tubes (midships);

22× tubes, each with 7 BGM-109 Tomahawk cruise missiles, totaling 154

Beginning in 2002 through 2010, 22 of the 24 88 inches (2.2 m) diameter Trident missile tubes were modified to contain large vertical launch systems (VLS), one configuration of which may be a cluster of seven Tomahawk cruise missiles. In this configuration, the number of cruise missiles carried could be a maximum of 154, the equivalent of what is typically deployed in a surface battle group. Other payload possibilities include new generations of supersonic and hypersonic cruise missiles, and Submarine Launched Intermediate Range Ballistic Missiles (SLIRBM), unmanned air vehicles (UAVs), the ADM-160 MALD, sensors for anti-submarine warfare or intelligence, surveillance, and reconnaissance missions, countermine warfare payloads such as the AN/BLQ-11 Long Term Mine Reconnaissance System (LMRS), and the broaching universal buoyant launcher (BUBL) and stealthy affordable capsule system (SACS) specialized payload canisters.

The missile tubes also have room for stowage canisters that can extend the forward deployment time for special forces. The other two Trident tubes are converted to swimmer lockout chambers. For special operations, the Advanced SEAL Delivery System and the Dry Deck Shelter can be mounted on the lockout chamber and the boat will be able to host up to 66 special operations sailors or Marines, such as Navy SEALs, or USMC MARSOC teams. Improved communications equipment installed during the upgrade allows the SSGNs to serve as a forward-deployed, clandestine Small Combatant Joint Command Center.