Military Wiki
USS San Juan (SSN-751)
USS San Juan (SSN-751) returns to port)
Career (USA)
Name: USS San Juan
Namesake: The City of San Juan, Puerto Rico
Awarded: 30 November 1982
Builder: General Dynamics Electric Boat
Laid down: 9 August 1985
Launched: 6 December 1986
Sponsored by: Mrs. Sherrill Hernandez
Commissioned: 6 August 1988
Out of service: 8 April 2010 to 4 August 2011,
engineered overhaul
Homeport: Portsmouth Navy Yard, Kittery, Maine
Identification: 21312[1]
Motto: Technology and Tradition
Status: in active service, as of 2022
Notes: Assignment: Submarine Group TWO
North Atlantic, Groton, CT
Current Comdr: Oliver Lewis
1st Comdr 1988: Charles Young[2]
Badge: 751insig.png
General characteristics
Class & type: Los Angeles-class submarine
Displacement: 5,790 long tons (5,883 t) light
6,197 long tons (6,296 t) full
407 long tons (414 t) dead
Length: 110.3 m (361 ft 11 in)
Beam: 10 m (32 ft 10 in)
Draft: 9.4 m (30 ft 10 in)
Installed power: nuclear
Propulsion: S6G nuclear reactor
Complement: 12 officers, 98 men
Sensors and
processing systems:
BSY-1 sonar suite combat system
Armament: • 4 × 21 in (533 mm) torpedo tubes
• 12 × vertical launch Tomahawk missiles

USS San Juan (SSN-751), a Los Angeles-class submarine, is the third ship of the United States Navy to be named for San Juan, Puerto Rico. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 30 November 1982 and her keel was laid down on 9 August 1985. She was launched on 6 December 1986 sponsored by Mrs. Sherrill Hernandez, and commissioned on 6 August 1988, with CDR Charles Young in command.

As of 2012 the San Juan is assigned to Submarine Group Two and commanded by CDR Oliver Lewis.


San Juan was the first Los Angeles class (688-class) submarine to receive a number of significant improvements to the class's basic design, creating the 688I (for "improved 688"). San Juan and all following submarines in her class are quieter, incorporated an advanced AN/BSY-1 sonar suite combat system. The improvements also included the ability to lay mines from the torpedo tubes. The San Juan 's sail was also strengthened, enabling the ability to break through ice.[3]

First Through Ice Surfacing

In 1993 the San Juan conducted the first through-ice surfacing for a 688i class submarine in the Arctic.[4]

USS San Juan through-ice surface

Arriving Souda Bay, Crete, Greece, May 2007

Collision with USS Kentucky

On 19 March 1998 off the coast of Long Island, New York the submerged San Juan collided with the surfaced fleet ballistic missile submarine USS Kentucky (SSBN-737). There were no injuries reported with the collision.[5]

Lost Communication

On 13 March 2007, San Juan was the subject of a search and rescue mission by elements of the Enterprise Carrier Strike Group when a red flare was spotted in her projected vicinity, suggesting an emergency. Communications were established by the early hours of the next day when San Juan surfaced, and no problems were indicated.[6]

Visit to South Africa

On 4 November 2009 the San Juan arrived at Simon's Town, South Africa. The ship engaged in at-sea maneuvers with the South African Navy for the first time in U.S. history.[7]

2010 Overhaul

San Juan undocking at PNSY, 2011

The San Juan and crew arrived at Portsmouth Naval Shipyard (PNSY), Maine, on 8 April 2010 for an engineered overhaul (EOH); for maintenance and receive system upgrades.[8] On 4 August 2011, PNSY Shipyard workers successfully undock the San Juan one day early from the overhaul. The shipyard is a field activity of Naval Sea Systems Command to maximizing the material readiness of the Fleet.[9]


Submarine Group Two complement

The other ships along with the San Juan are:[11]

Part of Submarines Atlantic Fleet


This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain.
 This article incorporates public domain material from the United States Navy website

External links

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