USS Guitarro (SSN-665)

USS Guitarro (SSN-665), a , was the second ship of the United States Navy to be named for the guitarro, a ray of the guitarfish family.

Construction and commissioning

Keel-laying and launching
The contract to build Guitarro was awarded to Mare Island Naval Shipyard at Vallejo, California, on 18 December 1964 and her keel was laid down there on 9 December 1965.  She was launched on 27 July 1968, sponsored by Mrs. John M. Taylor, wife of Vice Admiral John Taylor.

On March 15, 1969 during a meeting with the shipyard managers, Cmdr. William G. Lange urged them to create  centralized control and designate responsibility for all construction. The shipyard representatives dismissed his idea, saying "the shipyard had been building ships for a long time without the need for such a procedure and no one had been killed or equipments damaged yet."

Sinking
 On 15 May 1969, Guitarro was moored in the Napa River at Mare Island Naval Shipyard while construction was still underway. At about 16:00, a civilian nuclear construction group began to calibrate the  aft ballast tanks, which required them to fill the tanks with approximately  of water.  Within 30 minutes, a different, non-nuclear civilian construction group began an assignment to bring Guitarro within a half-degree of trim; this entailed adding water to the forward ballast tanks to overcome a reported two-degree up-bow attitude. Until shortly before 20:00, both groups continued to add water, unaware of each other's activities.

Twice between 16:30 and 20:00, a security watch advised the non-nuclear group that Guitarro was riding so low forward that the 1.5-foot-high (0.46 m) wakes of boats operating in the Napa River were sloshing into the sonar dome manhole, but the group ignored the warnings.  At 19:45, the non-nuclear group stopped adding water to the ballast tanks and began to halt work for their meal break, leaving at 20:00. At 19:50, the nuclear group completed their calibrations and began to empty the tanks aft.

At 20:30, both the nuclear group, still aboard, and the non-nuclear group, returning from their break, noticed Guitarro taking a sudden down angle which put the forward hatches underwater.  Massive flooding took place through several large open hatches.  Efforts between 20:30 and 20:45 to close watertight doors and hatches were largely unsuccessful because lines and cables ran through the doors and hatches, preventing them from closing. At 20:55, Guitarro sank, leaving only her sail above water, earning her the nickname "Mare Island Mud Puppy".

Causes

In an attempt to correct what they thought was an out of trim condition, the non-nuclear construction team in the forward part of the boat purposefully defeated safety measures preventing accidentally filling ballast tanks while the sub was under construction. During construction, steel plates are welded over the ballast tanks flood ports to prevent water from getting into the tanks and putting the submarine in an unsafe condition. The construction crew put a fire hose down the tank's vent pipe and forced it past the check valve.

The Congressional report concluded that the sinking was caused in large part by "the action, or inaction, of certain construction workers who either failed to recognize an actual or potential threat to the ship's safety or assumed that it was not their responsibility." The report stated that the "lack of centralized control and responsibility for all construction" was the overriding cause.

One of the factors contributing to the ship's sinking was the open manhole used to access the bow structure sonar dome containing the boat's sonar sphere. The manhole has a bolted cover which had been removed for maintenance purposes. The opening was  protected by a cofferdam approximately  high. The cofferdam was intended to prevent water from accidentally entering the dome and contacting the exposed electronic gear.

To facilitate repair work, the cofferdam and the bolted manhole cover were removed  in early March 1969 and neither the cofferdam nor the cover was ever replaced. When the construction crews added and then removed water from the ballast tanks, affecting the boat's trim, the manhole was exposed to waves caused by the wake of other vessels, causing the boat to sink at the bow, eventually filling the entire submarine.

Refloating

Guitarro was refloated three days later, on 18 May 1969. Damages to her were estimated at $15.2 to $21.85 million (equivalent to $ to $ million in ).

Lessons learned

Among other recommendations affecting communication, management, and supervision of ship construction, the report authors recommended that cables and lines running through watertight hatches and doors be equipped with quick disconnect fittings.

Commissioning
Guitarro had been scheduled to be commissioned in January 1970, but repairs necessitated by her sinking dictated a 32-month delay. She finally was commissioned on 9 September 1972 with Commander Gordon Lange in command.

Service history

In the mid-to-late 1970s, Guitarro was stationed at Point Loma in San Diego, California, commanded by Alvin H. Pauole, followed by Scott Van Hoften.  She was active at the time in the pre-operational testing of the new Tomahawk cruise missile, launching several of the missiles on a test range off the coast of Southern California.

Guitarro (SSN-665) at NAS North Island on 4 October 1990 for a VIP visit. General Mikhail Moiseyev, First Deputy Minister of Defense and Chief of the General Staff for the Soviet Union and General Colin Powell, Chairman of the Joint Chiefs of Staff, toured the forward areas of the ship that day, but did not tour the engineering spaces. Just aft of the Guitarro (SSN-665) is the Missouri BB-63.

Decommissioning and disposal
Guitarro was decommissioned on 29 May 1992 and stricken from the Naval Vessel Register the same day. Her scrapping via the Nuclear-Powered Ship and Submarine Recycling Program at Puget Sound Naval Shipyard in Bremerton, Washington, was completed on 18 October 1994.

References 

NavSource Online: Submarine Photo Archive Guitarro (SSN-665) Keel Laying - Launching
NavSource Online: Submarine Photo Archive Guitarro (SSN-665) Sinking & Commissioning
NavSource Online: Submarine Photo Archive Guitarro (SSN-665) Active Service - Decommissioning

External links

The Sinking of the USS Guitarro Report to L. Mendel Rivers, Chairman, Committee on Armed Services from Samuel S. Stratton, Chairman, Special Subcommittee To Investigate the Sinking of the U.S.S. Guitarro.

Guitarro II (SSN-665) 1972–1994

Category:Sturgeon-class submarines
Category:Cold War submarines of the United States
Category:Nuclear submarines of the United States Navy
Category:United States submarine accidents
Category:Maritime incidents in 1969
Category:Ships built in Vallejo, California
Category:1968 ships
Category:Mare Island