USS Trigger (SS-564)
Encyclopedia

USS Trigger (SS-564), a , was the second ship of the United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 to be named for the triggerfish
Triggerfish
Triggerfishes are about 40 species of often brightly colored fishes of the family Balistidae. Often marked by lines and spots, they inhabit tropical and subtropical oceans throughout the world, with the greatest species richness in the Indo-Pacific...

, any of numerous deep-bodied fishes of warm seas having an anterior dorsal fin with two or three stout erectile spines.

Her keel was laid down on 24 February 1949 at Groton, Connecticut
Groton, Connecticut
Groton is a town located on the Thames River in New London County, Connecticut, United States. The population was 39,907 at the 2000 census....

, by the Electric Boat
Electric boat
While a significant majority of water vessels are powered by diesel engines, with sail power and gasoline engines also remaining popular, boats powered by electricity have been used for over 120 years. Electric boats were very popular from the 1880s until the 1920s, when the internal combustion...

 Company. She was launched
Ship naming and launching
The ceremonies involved in naming and launching naval ships are based in traditions thousands of years old.-Methods of launch:There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching." The oldest, most familiar, and most widely...

 on 14 June 1951 sponsored by Mrs. Roy S. Benson
Roy S. Benson
Roy Stanley Benson is a veteran submarine commander from World War II who later served as the Commander Submarine Force U.S. Pacific Fleet during the Cold War.-Naval career:...

, and commissioned
Ship commissioning
Ship commissioning is the act or ceremony of placing a ship in active service, and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to the placing of a warship in active duty with its country's military...

 on 31 March 1952 with Commander Edward L. Beach in command.

History

Following shakedown training off Rio de Janeiro
Rio de Janeiro
Rio de Janeiro , commonly referred to simply as Rio, is the capital city of the State of Rio de Janeiro, the second largest city of Brazil, and the third largest metropolitan area and agglomeration in South America, boasting approximately 6.3 million people within the city proper, making it the 6th...

, Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

, the attack submarine returned to her home port, New London, Conn.
Naval Submarine Base New London
Naval Submarine Base New London is the United States Navy's primary submarine base, the "Home of the Submarine Force", and "the Submarine Capital of the World".-History:...

, and participated in local operations for the remainder of the year. She was back in the Caribbean Sea
Caribbean Sea
The Caribbean Sea is a sea of the Atlantic Ocean located in the tropics of the Western hemisphere. It is bounded by Mexico and Central America to the west and southwest, to the north by the Greater Antilles, and to the east by the Lesser Antilles....

 in February, returned to New London on 28 March, and continued East Coast operations until 16 August 1957. She then joined submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

  and proceeded to the Arctic Ocean
Arctic Ocean
The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...

. The submarine spent ten days at the ice pack in the north Greenland Sea
Greenland Sea
The Greenland Sea is a body of water that borders Greenland to the west, the Svalbard archipelago to the east, Fram Strait and the Arctic Ocean to the north, and the Norwegian Sea and Iceland to the south. The Greenland Sea is often defined as part of the Arctic Ocean, sometimes as part of the...

 and made several short trips under the ice pack. From 16 September to 1 October, she participated in the North Atlantic Treaty Organisation (NATO) Operation "Strikeback"
Operation Strikeback
Operation Strikeback was a major naval exercise of the North Atlantic Treaty Organization that took place over a ten-day period in September 1957....

. She then called at Portland
Portland Harbour
Portland Harbour is located beside the Isle of Portland, off Dorset, on the south coast of England. It is one of the largest man-made harbours in the world. Grid reference: .-History:...

, England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 and Le Havre
Le Havre
Le Havre is a city in the Seine-Maritime department of the Haute-Normandie region in France. It is situated in north-western France, on the right bank of the mouth of the river Seine on the English Channel. Le Havre is the most populous commune in the Haute-Normandie region, although the total...

, France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

, en route back to New London to resume normal operations.

On 14 January 1958, Trigger entered the Portsmouth Naval Shipyard
Portsmouth Naval Shipyard
The Portsmouth Naval Shipyard , often called the Portsmouth Navy Yard, is a United States Navy shipyard located in Kittery on the southern boundary of Maine near the city of Portsmouth, New Hampshire. It is used for remodeling and repairing the Navy's ships...

 in Kittery, Maine
Kittery, Maine
Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals...

 for major alterations. Her four troublesome high-speed diesel engines were replaced by three reliable medium-speed engines. The submarine was cut in two and lengthened by nine feet to accommodate the large, easier-to-maintain engines. On 15 August, she got underway for New London and refresher training. She stood out of New London on 2 February 1959 for extended operations in the North Atlantic. She called at Faslane, Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

, and returned to her home port in late April.

On 1 August, Trigger joined Submarine Squadron 4
Submarine Squadron 4
Submarine Squadron 4 is a squadron of submarines based at US Naval Submarine Base New London, Groton, Connecticut under the command of Captain Robert Clark II . The submarines that make up SUBRON 4 include:...

 (SubRon 4) at Charleston, S.C. her new home port and, in late September and early October, participated in NATO Exercise "Fishplay". The submarine conducted operations out of Charleston for the next decade. She was deployed to the Sixth Fleet in the Mediterranean during the periods: 10 April to 6 August 1962; 7 July to 29 October 1966; and 7 October 1969 to 2 February 1970. From 6 January to 6 August 1964, she underwent modifications in connection with the SUBSAFE program; and, from 3 January 1968 to 6 June 1969, her hull was again lengthened to accommodate the PUFFS sonar
Sonar
Sonar is a technique that uses sound propagation to navigate, communicate with or detect other vessels...

 equipment.

On 10 August 1970, Trigger departed Charleston for the west coast and assignment to the Pacific Fleet. She called at Montego Bay
Montego Bay
Montego Bay is the capital of St. James Parish and the second largest city in Jamaica by area and the fourth by population .It is a tourist destination with duty free shopping, cruise line terminal and the beaches...

, Rodman
Rodman
-Places in the United States:* Rodman, Iowa* Rodman, New York* Rodman Mountains, California* Rodman Reservoir, Florida-People:* Rodman "Rod" Serling, television host* Dennis Rodman, former NBA basketball player* Isaac P...

, and Acapulco
Acapulco
Acapulco is a city, municipality and major sea port in the state of Guerrero on the Pacific coast of Mexico, southwest from Mexico City. Acapulco is located on a deep, semi-circular bay and has been a port since the early colonial period of Mexico’s history...

 en route, and arrived at San Diego, California
San Diego, California
San Diego is the eighth-largest city in the United States and second-largest city in California. The city is located on the coast of the Pacific Ocean in Southern California, immediately adjacent to the Mexican border. The birthplace of California, San Diego is known for its mild year-round...

, her new home port, on 6 September to join SubRon 3. On 18 November, the submarine got underway for Bangor, Washington, to spend a month testing the Mark 48 torpedo
Mark 48 torpedo
The Mark 48 and its improved ADCAP variant are heavyweight submarine-launched torpedoes. They were designed to sink fast, deep-diving nuclear-powered submarines and high-performance surface ships.-History:...

. From 3 March to 7 June 1971, Trigger returned to Bangor to participate in Mk 48 Torpedo Selection Test Plan operations. Following yard work at the Hunter's Point Naval Shipyard from July 1971 to April 1972, she made a voyage to the Nanoose Bay Acoustic Test Range and returned to San Diego on 25 May.

On 17 October, Trigger stood out to sea on her first WestPac deployment. She called at Christmas Island
Christmas Island
The Territory of Christmas Island is a territory of Australia in the Indian Ocean. It is located northwest of the Western Australian city of Perth, south of the Indonesian capital, Jakarta, and ENE of the Cocos Islands....

 on 31 October and arrived at Auckland, New Zealand, on 10 November. The operational control of Trigger was shifted to the Commander, Seventh Fleet; and she participated in Exercise "Longex 7," a combined fleet problem utilizing ships from the navies of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, and Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. The submarine departed Auckland
Auckland
The Auckland metropolitan area , in the North Island of New Zealand, is the largest and most populous urban area in the country with residents, percent of the country's population. Auckland also has the largest Polynesian population of any city in the world...

 on 1 December and arrived at Subic Bay
U.S. Naval Base Subic Bay
U.S. Naval Base Subic Bay was a major ship-repair, supply, and rest and recreation facility of the United States Navy located in Zambales, Philippines. It was the largest U.S...

 on 18 December. From 29 December 1972 until 25 January 1973, Trigger was underway conducting special submarine operations. She left the Philippines
Philippines
The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 on 3 February and, after calling at Hong Kong
Hong Kong
Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...

, participated in a joint United States-Canadian exercise off Taiwan
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

. The ship sailed for Yokosuka on 20 February and remained in Japan undergoing repairs until getting underway for the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 on 16 March.

The submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

 arrived at San Diego, California
San Diego, California
San Diego is the eighth-largest city in the United States and second-largest city in California. The city is located on the coast of the Pacific Ocean in Southern California, immediately adjacent to the Mexican border. The birthplace of California, San Diego is known for its mild year-round...

, on 5 April. On 25 June, she started training a crew of the Marina Militare
Marina Militare
The Italian Navy is the navy of the Italian Republic. It is one of the four branches of military forces of Italy; formed in 1946, from what remained of the Regia Marina . As of 2008, the Italian Navy had 35,200 active personnel with 180 commissioned ships, 19 Floating Docks, and 123 aircraft...

to operate the ship. Trigger was decommissioned and transferred to Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 on 10 July 1973. She was struck from the Naval Vessel Register
Naval Vessel Register
The Naval Vessel Register is the official inventory of ships and service craft in custody of or titled by the United States Navy. It contains information on ships and service craft that make up the official inventory of the Navy from the time a vessel is authorized through its life cycle and...

on 2 July 1973.

Livio Piomarta (S-515)

Ex-Trigger served as until she was decommissioned on 28 February 1986.

External links

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