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SSBN-616 Lafayette-Class FBM Submarines 

Overview 

Specifications
Boat List
Images

The USS James Monroe (SSBN-622) on 9 January 1968 became the first submarine with POLARIS A2's to enter overhaul and to receive POLARIS A3 capability.

In 1974 the SSBN Extended Refit Program (ERP). was initiated. Previously, an operational SSBN was scheduled to undergo an overhaul approximately every 7 ½ years, which resulted in taking it off line for almost 2 years. To increase the SSBNs at sea effectiveness, it was decided to initiate a program to accomplish some preventive/corrective maintenance (mini-overhaul) on SSBNs at its normal refit site. This was done by extending a normal 32-day refit/upkeep between patrols to provide a 60-day extended refit period. This was to be conducted at 4-year and 7 ½ year intervals after initial deployment or overhaul of a SSBN. The time between overhauls was then extended to 10 years versus the 7 ½ years. The first SSBN to undergo ERP was the USS James Madison (SSBN-627); the ERP was conducted at the Holy Loch, Scotland, tender refit site in September- November 1974.

Lockheed commenced the TRIDENT I (C4) program in November of 1973 with the missile's IOC date established as 1979. The first of the new Ohio-Class submarines was authorized in 1974 but would not be available until 1979. Thus the Navy decided to borrow a page from the Extended Refit Program (ERP) book and a C3 to C4 SSBN "backfit" program was initiated in mid- 1976. Five additional SSBNs 629, 630, and 634 underwent a "pierside backfit" while three other SSBNs (627, 632, and 633) were backfitted during their normally-scheduled second shipyard overhauls.

On 10 June 1985, the White House announced the decision to dismantle a ballistic missile submarine to remain within the SALT II ceiling on MIRVed missiles. USS Sam Rayburn (SSBN-635) was selected to fulfill this requirement and was deactivated on 16 September 1985, with missile tubes filled with concrete and tube hatches removed.

The USS Sam Rayburn was converted into a training platform - Moored Training Ship (MTS-635). The Sam Rayburn arrived for conversion on February 1, 1986, and on July 29, 1989 the first Moored Training Ship achieved initial criticality. Modifications included special mooring arrangements including a mechanism to absorb power generated by the main propulsion shaft. USS Daniel Webster (SSBN 626) was converted to the second Moored Training Ship (MTS2 / MTS 626) in 1993. The Moored Training Ship Site is located at Charleston, SC. The USS Sam Rayburn is scheduled to operate as an MTS until 2014 while undergoing shipyard availabilities at four year intervals.

 

Specifications  Return to Top

Builders: General Dynamics Electric Boat Division. Mare Island Naval Shipyard Portsmouth Naval Shipyard, Newport News Shipbuilding
Power Plant: S5W nuclear reactor
two geared steam turbines, 15,000 SHP, one shaft
Length: 425 feet (129.6 meters)
Beam: 33 feet (10.06 meters)
Displacement:

light 6,650 tons
standard 7,250 tons
submerged 8,250 tons

Speed:

Surfaced 16-20 knots
submerged: 22 -25 knots

Test depth: 1,300 feet
Crew: 13 Officers, 130 Enlisted
Armament: 16 tubes for Polaris or Poseidon
4 - 21" Torpedo Tubes (All Foward)
MK 14/16 Anti-ship Torpedo
MK 37 Anti-Submarine Torpedo
MK 45 ASTOR NuclearTorpedo
MK 48 Anti-Submarine Torpedo

Boat List  Return to Top

Boat Name Builder Homeport Ordered Commissioned Decommissioned
SSBN-616 Lafayette Electric Boat Groton 22 Jul 60 23 Apr 63 12 Aug 91
SSBN-617 Alexander Hamilton Electric Boat Groton 22 Jul 60 27 Jun 63 23 Feb 93
SSBN-619 Andrew Jackson Mare Island NSY   23 Jul 60 03 Jul 63 31 Aug 89
SSBN-620 John Adams Portsmouth NSY   23 Jul 60 12 May 64 24 Mar 89
SSBN-622 James Monroe Newport News Charleston 03 Feb 61 07 Dec 63 25 Sep 90
SSBN-623 Nathan Hale Electric Boat   03 Feb 61 23 Nov 63 31 Dec 86
SSBN-624 Woodrow Wilson Mare Island NSY Charleston 09 Feb 61 27 Dec 63 01 Sep 94
SSBN-625 Henry Clay Newport News Charleston 03 Feb 61 20 Feb 64 05 Nov 90
SSBN-626 Daniel Webster Electric Boat Groton 03 Feb 61 09 Apr 64 30 Aug 90
SSBN-627 James Madison Newport News Charleston 20 Jul 61 28 Jul 64 20 Nov 92
SSBN-628 Tecumseh Electric Boat Norfolk 20 Jul 61 29 May 64 23 Jul 93
SSBN-629 Daniel Boone Mare Island NSY Norfolk 21 Jul 61 23 Apr 64 18 Feb 94
SSBN-630 John C Calhoun Newport News Charleston 20 Jul 61 15 Sep 64 28 Mar 94
SSBN-631 Ulysses S Grant Electric Boat Portsmouth 20 Jul 70 17 Jul 64 12 Jun 92
SSBN-632 Von Steuben Newport News Charleston 20 Jul 61 30 Sep 64 26 Feb 94
SSBN-633 Casimir Pulaski Electric Boat Charleston 20 Jul 61 14 Aug 64 07 Mar 94
SSBN-634 Stonewall Jackson Mare Island NSY Charleston 21 Jul 61 26 Aug 64 09 Feb 95
SSBN-635 Sam Rayburn Newport News   20 Jul 61 02 Dec 64 31 Jul 89
SSBN-636 Nathaniel Green Portsmouth NSY   21 Jul 61 19 Dec 64 31 Jan 87
NOTE: Hull number sequence
SSBN-618 Thomas Jefferson was last Ethan Allen-class FBM Submarine
SSN-621 Haddock attack submarine accounts for the other break in numerical hull sequence


Images  Return to Top