USS Helena (SSN-725)

For other ships with the same name, see USS Helena.

USS Helena (SSN-725)
History
United States
NameUSS Helena
NamesakeThe City of Helena, Montana
Awarded19 April 1982
BuilderGeneral Dynamics Electric Boat
Laid down28 March 1985
Launched28 June 1986
Sponsored byMrs. Jean Busey
Commissioned11 July 1987
HomeportNorfolk, Virginia
IdentificationUIC 21367
MottoProud and Fearless
Statusin active service
Badge
General characteristics
Class and typeLos 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
Length110.3 m (361 ft 11 in)
Beam10 m (32 ft 10 in)
Draft9.4 m (30 ft 10 in)
Installed powerSteam Turbine (nuclear)
Propulsion
  • 1 × S6G PWR nuclear reactor with D2W core (165 MW), HEU 93.5%[1][2]
  • 2 × steam turbines (33,500) shp
  • 1 × shaft
  • 1 × secondary propulsion motor 325 hp (242 kW)
Complement12 officers; 98 enlisted
Armament4 × 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

USS Helena (SSN-725), a Los Angeles-class submarine, was the fourth ship of the United States Navy to be named for Helena, Montana. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 19 April 1982 and her keel was laid down on 28 March 1985. She was launched on 28 June 1986 sponsored by Mrs. Jean Busey, and commissioned on 11 July 1987. She is scheduled to be decommissioned in 2024 at the Puget Sound Naval Shipyard.

  1. ^ "International Panel on Fissile Materials". fissilematerials.org. 10 April 2020. Retrieved 27 February 2022.
  2. ^ "Validation of the Use of Low Enriched Uranium as a Replacement for Highly Enriched Uranium in US Submarine Reactors" (PDF). dspace.mit.edu. June 2015. Retrieved 27 February 2022.