Engineering:Ethan Allen-class submarine

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Short description: United States Navy class of fleet ballistic missile submarines
USS Ethan Allen
Class overview
Name: Ethan Allen class
Builders:
  • General Dynamics Electric Boat[1]
  • Newport News Shipbuilding[1]
Operators:  United States Navy
Preceded by: Script error: The function "sclass" does not exist.
Succeeded by: Script error: The function "sclass" does not exist.
Built: 1959–1963
In commission: 1961–1992[1]
Completed: 5[1]
Retired: 5[1]
General characteristics
Type: Ballistic missile submarine
Displacement:

Surfaced: 6,946 long tons (7,057 t)

Submerged: 7,884 long tons (8,011 t)[2]
Length: 410 ft 4 in (125.07 m)
Beam: 33.1 ft (10.1 m)
Draft: 29 ft 10 in (9.09 m)
Propulsion:
Speed:
  • 16 knots (30 km/h) surfaced
  • 22 knots (41 km/h) submerged[2]
Test depth: 1,300 ft (400 m)[2]
Complement: 12 officers and 128 enlisted (two crews, "Blue" and "Gold")
Armament: 16 Polaris A2/A3 missiles, 4 × 21-inch (533 mm) torpedo tubes, 12 torpedoes[2]

The Ethan Allen class of fleet ballistic missile submarine was an evolutionary development from the Script error: The function "sclass" does not exist.. The Ethan Allen, together with the George Washington, Script error: The function "sclass" does not exist., Script error: The function "sclass" does not exist., and Script error: The function "sclass" does not exist. classes comprised the "41 for Freedom" that were the Navy's main contribution to the nuclear deterrent force through the late 1980s.

Design

Rather than being designed as Script error: The function "sclass" does not exist. attack submarines with a missile compartment added, the Ethan Allens were the first submarines designed "from the keel up" as Fleet Ballistic Missile (FBM) submarines carrying the Polaris A-2 missile - the Ethan Allen-class was the first to be designed under project SCB 180, and the George Washington-class was a subsequent design (SCB 180A) made for a quickly implemented mobilization effort.[2] They were functionally similar to the George Washingtons, but longer and more streamlined and with torpedo tubes reduced to four. In the early and mid-1970s, they were upgraded to Polaris A3s. Because their missile tubes could not be modified to carry the larger diameter Poseidon missile,[3] they were not further upgraded.

Conversions

To comply with SALT II treaty limitations as the Script error: The function "sclass" does not exist. ballistic missile submarines entered service, in the early 1980s the Ethan Allens were refitted and officially designated SSNs (fast attack submarines), but often referred to as a "slow approach". Their missile fire control systems were removed and the missile tubes were filled with concrete. Sam Houston and John Marshall were further converted to carry SEALs or other Special Operations Forces, accommodating 67 troops each with dry deck shelters to accommodate SEAL Delivery Vehicles or other equipment. The Ethan Allen-class submarines were decommissioned between 1983 and 1992.[4] All were disposed of through the nuclear Ship-Submarine Recycling Program 1992–1999.

Boats in class

Submarines of the Ethan Allen class:[1][4][5]

Hull number Name Builder Laid down Launched Commissioned Decommissioned Fate
SSBN-608 missing name General Dynamics Electric Boat 14 September 1959 22 November 1960 8 August 1961 31 March 1983 Disposed,[lower-alpha 1] 1999
SSBN-609 missing name Newport News Shipbuilding and Drydock Co. 28 December 1959 2 February 1961 6 March 1962 6 September 1991 Disposed,[lower-alpha 1] 1992
SSBN-610 missing name General Dynamics Electric Boat 15 March 1960 15 June 1961 10 March 1962 1 December 1983 Disposed,[lower-alpha 1] 1997
SSBN-611 missing name Newport News Shipbuilding and Drydock Co. 4 April 1960 15 July 1961 21 May 1962 22 July 1992 Disposed,[lower-alpha 1] 1993
SSBN-618 missing name 3 February 1961 24 February 1962 4 January 1963 24 January 1985 Disposed,[lower-alpha 1] 1998
  1. ↑ 1.0 1.1 1.2 1.3 1.4 through the Ship-Submarine Recycling Program

See also

  • List of submarines of the United States Navy
  • List of submarine classes of the United States Navy

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 ""SSBN-608 Ethan Allen-Class FBM Submarines" from the FAS". https://fas.org/programs/ssp/man/uswpns/navy/submarines/ssbn608_ethanallen.html. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Friedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 199–200, 244. ISBN 1-55750-260-9. 
  3. ↑ Polmar, Norman (1981), The Ships and Aircraft of the U.S. Fleet (12th ed.), London: Arms and Armour Press, p. 22, ISBN 0-85368-397-2 
  4. ↑ 4.0 4.1 Gardiner, Robert; Chumbley, Stephen, eds. (1995), Conway's All the World's Fighting Ships 1947–1995, Annapolis, USA: Naval Institute Press, p. 612, ISBN 1-55750-132-7 
  5. ↑ California Center of Military History (dead link 2015-05-07)

Template:Ethan Allen class submarine Template:US submarine classes after 1945



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