USS South Dakota (SSN-790)

USS South Dakota (SSN-790), is a nuclear powered Virginia-class submarine in service with the United States Navy. The contract to build her was awarded to Huntington Ingalls Industries in partnership with the Electric Boat division of General Dynamics in Newport News, Virginia on 22 December 2008. This boat is the seventh of the Block III submarines which will feature a revised bow, including some technology from Ohio-class SSGNs.[12] The keel laying ceremony took place on 4 April 2016. The boat's sponsor is Deanie Dempsey, wife of General Martin Dempsey.[1] Her christening ceremony took place on 14 October 2017 in Groton, Connecticut.

For other ships with the same name, see USS South Dakota.

USS South Dakota (SSN-790)
South Dakota on 9 January 2019
History
United States
NameUSS South Dakota
NamesakeThe state of South Dakota
Awarded22 December 2008
BuilderElectric Boat
Laid down4 April 2016[1]
Sponsored byDeanie Dempsey[2]
Christened14 October 2017[3]
Acquired24 September 2018[4]
Commissioned2 February 2019[5]
HomeportGroton, Connecticut
IdentificationHull number: SSN-790
Motto
  • Subter Mare Dominamur
  • “Under the sea we rule”
StatusIn active service
Badge
General characteristics
Class and typeVirginia-class submarine
Displacement7800 tons light, 7800 tons full[6]
Length114.9 meters (377 feet)[6]
Beam10.3 meters (34 feet)
Propulsion
  • 1 × S9G PWR nuclear reactor[7] 280,000 shp (210 MW), HEU 93%[8][9]
  • 2 × steam turbines 40,000 shp (30 MW)
  • 1 × single shaft pump-jet propulsor[7]
  • 1 × secondary propulsion motor[7]
Speed25 knots (46 km/h)[10]
RangeEssentially unlimited distance; 33 years
Test depthgreater than 800 feet (240 meters)[11]
Complement134 officers and men[10]

References
  1. "Keel laying held in Rhode Island for stealthy Navy submarine". Associated Press News (Press release). 5 April 2016. Retrieved 5 April 2016.
  2. McDermott, Jennifer (4 April 2016). "Keel laying held for Navy attack sub South Dakota". NavyTimes.com. Retrieved 17 October 2019.
  3. Osborn, Kris (16 October 2017). "U.S. Navy Launches Most High-Tech & Stealthy Nuclear Attack Submarine Ever". Retrieved 17 October 2019.
  4. "Future USS South Dakota Delivered to U.S. Navy" (Press release). United States Navy. 25 September 2018. NNS180925-11. Retrieved 25 September 2018.
  5. "USS South Dakota (SSN 790) Commissioned" (Press release). United States Navy. 2 February 2019. NNS190202-06. Retrieved 2 February 2019.
  6. Ryan, Joal (30 May 2019). "The christening of the USS South Dakota". CNET. Retrieved 17 October 2019.
  7. Ragheb, Magdi (9 September 2011), Tsvetkov, Pavel (ed.), "Nuclear Naval Propulsion", Nuclear Power - Deployment, Operation and Sustainability, ISBN 978-953-307-474-0
  8. "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 20 March 2022.
  9. "US study of reactor and fuel types to enable naval reactors to shift from HEU fuel". fissilematerials.org. 10 April 2020. Retrieved 20 March 2022.
  10. "The US Navy – Fact File". 26 February 2019. Archived from the original on 3 July 2007. Retrieved 5 July 2007.
  11. "SSN-774 Virginia-class". GlobalSecurity.org. Retrieved 17 October 2019.
  12. "Virginia Block III: The Revised Bow". Retrieved 20 May 2008.
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