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Submarine Development Squadron 5, established in 1967 as Submarine
Development Group 1 by the Chief of Naval Operations, is the
operational focal point for all Navy deep submergence matters. Since its
commissioning, Development Squadron has become the working
repository for deep ocean technology and the operational, at-sea
application of that technology.
Located at Submarine Base San Diego, the primary mission of Submarine Development Squadron 5
(SubDevRon) is the highly complicated and important task of submarine rescue. This is the
Squadron's main focus, implemented by the Deep Submergence Unit (DSU) at Naval Air Station North
Island, also in San Diego. DSU maintains the Navy's only two deep submergence rescue vehicles;
Mystic (DSRV 1) and Avalon (DSRV 2). One vehicle is in a rescue-ready, standby status at all times to
conduct submarine rescue -- 24 hours a day, seven days a week, 365 days a year. The DSRV and its
200 tons of support gear are capable of being flown any where in the world on one C-5 Galaxy cargo

Development Squadron 5 is also responsible for deep ocean search and recovery and scientific
research operations for a variety of agencies, both inside the military and out. Besides the various
units at DSU, Development Squadron is in charge of two submarines--USS Dolphin (AGSS 555) and
USS Parche (SSN 683). Dolphin is homeported in San Diego and is the navy's last diesel-electric,
deep-diving research and development submarine. Parche operates out of Submarine Base Bangor,
Wash. in concert with the Squadron's other Northwestern detachments.
In 1967 Commander, Submarine Development Squadron FIVE, was
established as Submarine Development Group ONE by the Chief of Naval
Operations. In 1982 the Chief of Naval Operations formally established the
Submarine Development Group ONE Detachment for Unmanned Vehicle
Command. Submarine Development Group One was a tenant command at
SUBASE Bangor. The mission of submarine rescue is carried on by elements
of Commander Submarine Development Group One, including the Deep
Submergence Rescue Vehicles (DSRV) Mystic and Avalon and the U.S. Navy
divers manning the fly-away submarine rescue chambers at the Deep Submergence Unit, at North
Island Naval Air Station, San Diego CA. USS Dolphin (AGSS 555), a unit of Submarine Development
Group One, is used for research and development of advanced sonar equipment and systems.

On 17 November 1970, SSN-575 SEAWOLF transited the Panama Canal coinciding with her change of
home port from Groton, Connecticut to Mare Island Naval Shipyard in Vallejo, California for
conversion to a special project platform. In 1974, SEAWOLF completed her extensive
post-conversion testing and evaluation period and conducted her first Pacific Fleet deployment
which included operating independently for a period of three months. For her performance of duty,
she was awarded second Navy Unit Commendation. In 1975, SEAWOLF came under the exclusive
direction of Submarine Development Group One, and for outstanding performance in 1974-1975,
was awarded a Battle Efficiency "E". In 1976, SEAWOLF received her second consecutive Battle
Efficiency "E" and the Engineering "E" for Excellence. During her second Pacific Fleet deployment,
she conducted independent submerged operations for three months and demonstrated superior
endurance by remaining submerged for 87 consecutive days, a US Navy record. She received her
third Navy Unit Commendation. In 1977, SEAWOLF received her third Battle Efficiency "E" and her
second Engineering "E" for Excellence. During her third Pacific Fleet deployment, she conducted
79 consecutive days of independent submerged operations and received her fourth Navy Unit
Commendation and the Navy Expeditionary Medal. In 1978, SEAWOLF conducted her fourth Pacific
Fleet deployment. In August 1981, SEAWOLF deployed on her fifth Pacific Fleet deployment. She
returned to homeport in October 1981 and received the Navy Expeditionary Medal. In 1983,
SEAWOLF conducted her sixth Pacific Fleet deployment of 76 days and returned to Mare Island
Naval Shipyard in May 1983. She was awarded the Navy Expeditionary Medal, another Battle
Efficiency "E", another Engineering "E", a Supply "E", and a Damage Control "DC". In 1984,
SEAWOLF conducted a 93-day deployment to the Western Pacific, returned in July, and continued
her high operating tempo with numerous local operations. She was awarded her third consecutive
Supply "E", a Communications "C", and the Deck Seamanship Award. In 1985, SEAWOLF conducted
her last successful Western Pacific deployment and returned to Mare Island on 1 April 1985 to
prepare for decommissioning. USS SEAWOLF (SSN 575) was decommissioned on March 30, 1987.

In June of 1979 the Secretary of the Navy awarded Sperry (AS-12 )the Meritoriour Unit
Commendation for meritorious service in support of the units of Submarine Group Five, Submarine
Development Group One and Submarine Squadron Three from 1 April 1978 to 1 December 1978.

On 30 October 1976 USS Parche steamed into her new home port at Mare Island Naval Shipyard,
Vallejo, California. Here she began her new career with Submarine Development Group One.

The Advanced Tethered Vehicle (ATV) is a tethered, unmanned vehicle system designed for
operation at depths as great as 20,000 feet. The ATV was designed and built at the SSC San Diego's
Hawaii laboratory as a follow-on to the Remote Unmanned Work System (RUWS). It was tested and
evaluated along with the Advanced Unmanned Search System (AUSS) at NRaD San Diego. It was
then transferred to the Submarine Development Group One (SUBDEVGRU ONE) in San Diego in
February of 1993, with SSC SD continuing to provide support, re-engineering and new fabrication
of system components.

The US Navy submersibles SEA CLIFF and TURTLE and ROV ATV were made available for limited
academic research through a cooperative arrangement between NOAA and the US Navy's
Submarine Development Group One in San Diego, CA. The Navy Submarine Support Facility was
established at Point Loma in November 1963 on 280 acres of the land. On November 27, 1974 the
base was re-designated a shore command, serving assigned submarines, Submarine Group Five,
Submarine Squadron Three, Submarine Development Group One, the Submarine Training Facility
and later, Submarine Squadron Eleven. On October 1, 1981 the base was designated as Naval
Submarine Base. Starting in April 1995, several commands were decommissioned or their
homeports were changed to meet the down-sizing requirements of the Navy. Commands
throughout San Diego were regionalized in an effort to provide equal or better base services while
managing a reduced budget. The six naval installations on Point Loma were consolidated as Naval
Base Point Loma on 1 October, 1998.
Submarine Development Squadron FIVE