SSN-725 USS HELENA

Namesake. The City of Helena, Montana
Awarded. 19 Apr 1982
Builder. General Dynamics Electric Boat
Laid down. 28 March 1985
Launched. 28 June 1986
Commissioned. 11 July 1987
Homeport. Norfolk, VA
Motto. Proud and Fearless
Status. in active service
Class and type. Los Angeles-class submarine
Displacement:
5,808 long tons (5,901 t) light
6,203 long tons (6,303 t) full
395 long tons (401 t) dead
Length. 110.3 m (361 ft 11 in)
Beam. 10 m (32 ft 10 in)
Draft. 9.4 m (30 ft 10 in)
Installed power. Steam Turbine (nuclear)
Propulsion:
1 × S6G PWR nuclear reactor with D2W core (165 MW), HEU 93.5%)
2 × steam turbines (33,500) shp
1 × shaft
1 × secondary propulsion motor 325 hp (242 kW)
Complement. 12 officers; 98 enlisted
Armament. 4 × 21 in (533 mm) bow tubes, 10 Mk48 ADCAP torpedo reloads, Tomahawk land attack missile block 3 SLCM range 1,700 nautical miles (3,100 km), Harpoon anti–surface ship missile range 70 nautical miles (130 km), mine laying Mk67 mobile Mk60 captor mines