Benjamin Franklin-class submarine explained

The Benjamin Franklin class of US ballistic missile submarines were in Navy service from the 1960sā€“2000s. The class was an evolutionary development from the earlier of fleet ballistic missile submarine. Having quieter machinery and other improvements, it is considered a separate class. A subset of this class is the re-engineered 640 class starting with . The primary difference was that they were built under the new SUBSAFE rules after the loss of, earlier boats of the class had to be retrofitted to meet SUBSAFE requirements. The Benjamin Franklin class, together with the,,, and classes, comprised the "41 for Freedom" that was the Navy's primary contribution to the nuclear deterrent force through the late 1980s. This class and the James Madison class are combined with the Lafayettes in some references.

Design

The Benjamin Franklin-class submarines were built with the Polaris A-3 ballistic missile, and in the early 1970s were converted to carry the Poseidon C-3 missile. During the late 1970s and early 1980s, six boats were further modified to carry the Trident I (C-4) missile, along with six James Madison-class boats. These were Benjamin Franklin, Simon Bolivar, George Bancroft, Henry L. Stimson, Francis Scott Key, and Mariano G. Vallejo.

Due to the loss of in April 1963, this class was designed to SUBSAFE standards and its equipment was similar to the fast attack submarines (SSNs). Previous US SSBNs except the George Washington class had equipment similar to the SSNs.

This class can be distinguished by the fairwater planes' location halfway up the sail; the Lafayettes and James Madisons had the fairwater planes in the upper front portion of the sail.

Two submarines of this class were converted for delivery of up to 66 SEALs or other Special Operations Forces each. In the early 1990s, to make room for the ballistic missile submarines within the limits set by the SALT II strategic arms limitation treaty, the ballistic missile tubes of and were disabled. Those boats were redesignated special operations attack submarines and given attack submarine (SSN) hull classification symbols. They were equipped with dry deck shelters to accommodate SEAL Delivery Vehicles or other equipment.

Fate

The Benjamin Franklins were decommissioned between 1992 and 2002 due to a combination of SALT II treaty limitations as the SSBNs entered service, age, and the collapse of the Soviet Union. USS Kamehameha was decommissioned on 2 April 2002, the last ship of the Benjamin Franklin class to be decommissioned.[1]

The sail of George Bancroft is preserved at the Naval Submarine Base King's Bay, Georgia. James K. Polks sail is on display at the National Museum of Nuclear Science & History[2] in Albuquerque, New Mexico. Mariano G. Vallejos sail is preserved at Mare Island, California, where she was built. The sail of Lewis and Clark is on display at the Patriot's Point Maritime Museum in Charleston, South Carolina.

Boats in class

Submarines of the Benjamin Franklin class:(Submarines marked with * indicate Trident C-4 ballistic missile conversions.)

NameHull no.BuilderLaid downLaunched CommissionedDecommissionedPeriod of serviceFate
*SSBN-640General Dynamics Electric Boat25 May 19635 December 196422 October 196523 November 199328.1Disposed of through Ship-Submarine Recycling Program, 1995
*SSBN-641Newport News Shipbuilding and Drydock Co.17 April 196322 August 196429 October 19658 February 199529.3Disposed of through Ship-Submarine Recycling Program, 1995
SSBN-642Mare Island Naval Shipyard2 May 196316 January 196510 December 19652 April 200236.3Disposed of through Ship-Submarine Recycling Program, 2003
*SSBN-643General Dynamics Electric Boat24 August 196320 March 196522 January 196621 September 199327.7Disposed of through Ship-Submarine Recycling Program, 1998
SSBN-644Newport News Shipbuilding and Drydock Co.29 July 196321 November 196422 December 196527 June 199226.5Disposed of through Ship-Submarine Recycling Program, 1996
SSBN-645General Dynamics Electric Boat23 November 196322 May 196516 April 19668 July 199933.3Disposed of through Ship-Submarine Recycling Program, 2000
SSBN-654Newport News Shipbuilding and Drydock Co.2 March 196421 May 196529 April 196624 September 199226.4Disposed of through Ship-Submarine Recycling Program, 1994
*SSBN-655General Dynamics Electric Boat4 April 196413 November 196520 August 19665 May 199326.7Disposed of through Ship-Submarine Recycling Program, 1994
SSBN-656Newport News Shipbuilding and Drydock Co.24 August 196414 August 196515 June 196618 March 199326.8Disposed of through Ship-Submarine Recycling Program, 1994
*SSBN-657General Dynamics Electric Boat5 December 196423 April 19663 December 19662 September 199326.8Disposed of through Ship-Submarine Recycling Program, 1995
*SSBN-658Mare Island Naval Shipyard7 July 196423 October 196516 December 19669 March 199528.2Disposed of through Ship-Submarine Recycling Program, 1995
SSBN-659General Dynamics Electric Boat20 March 196521 July 19661 April 196712 April 199326.0Disposed of through Ship-Submarine Recycling Program, 1994

See also

References

Sources

External links

Notes and References

  1. Web site: Kamehameha at NavSource.org.
  2. Web site: Heritage Park. National Museum of Nuclear Science & History. 17 August 2012.