USS Mapiro (SS-376), a Balao-class

Balao class submarine

The Balao class was a successful design of United States Navy submarine used during World War II, and with 122 units built, the largest class of submarines in the United States Navy. An improvement on the earlier Gato class, the boats had slight internal differences...

 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...

, was a 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...

 named for the mapiro,
a fish of the Gobioidea suborder occurring off the West Indies and the Atlantic coasts of Central America

Central America

Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

 and Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

.

Mapiro was laid down by Manitowoc Shipbuilding Co., Manitowoc, Wisc., 30 May 1944; launched 9 November 1944; sponsored by Mrs. Philip H. Ross; and commissioned 30 April 1945, Commander Vincent A. Sisler, Jr., in command.

Following trials on Lake Michigan

Lake Michigan

Lake Michigan is one of the five Great Lakes of North America and the only one located entirely within the United States. It is the second largest of the Great Lakes by volume and the third largest by surface area, after Lake Superior and Lake Huron...

, Mapiro entered a floating drydock at Lockport, Ill.

Lockport, Illinois

Lockport is a city in Will County, Illinois, United States, that incorporated in 1853. Lockport is located in northeastern Illinois, 30 miles southwest of Chicago, and north of Joliet, at locks connecting Chicago Sanitary and Ship Canal with the Des Plaines River via the Lockport...

; and was towed down the Chicago

Chicago River

The Chicago River is a system of rivers and canals with a combined length of that runs through the city of the same name, including its center . Though not especially long, the river is notable for being the reason why Chicago became an important location, as the link between the Great Lakes and...

 and Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

s to New Orleans, La.

New Orleans, Louisiana

New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...

, to be readied for duty in the South Pacific. She sailed for the Canal Zone

Panama Canal Zone

The Panama Canal Zone was a unorganized U.S. territory located within the Republic of Panama, consisting of the Panama Canal and an area generally extending 5 miles on each side of the centerline, but excluding Panama City and Colón, which otherwise would have been partly within the limits of...

 31 May, arriving off Balboa

Balboa, Panama

Balboa is a district of Panama City, located at the Pacific entrance to the Panama Canal.- History :The town of Balboa, founded by the United States during the construction of the Panama Canal, was named after Vasco Núñez de Balboa, the Spanish conquistador credited with discovering the Pacific Ocean...

 5 June for training. On 28 June the submarine got underway for Hawaii

Hawaii

Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

 in company with , arriving Pearl Harbor

Pearl Harbor

Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

 15 July.

Mapiro sailed for the Marianas

Mariana Islands

The Mariana Islands are an arc-shaped archipelago made up by the summits of 15 volcanic mountains in the north-western Pacific Ocean between the 12th and 21st parallels north and along the 145th meridian east...

 on her first war patrol 4 August, arriving off Saipan

Saipan

Saipan is the largest island of the United States Commonwealth of the Northern Mariana Islands , a chain of 15 tropical islands belonging to the Marianas archipelago in the western Pacific Ocean with a total area of . The 2000 census population was 62,392...

 the day Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 surrendered, 15 August. She remained on observation patrol until returning to the west coast in September, arriving at San Francisco for deactivation by 25 August.

On 16 March 1946 Mapiro decommissioned to enter the Pacific Reserve Fleet at Mare Island, Calif.

Mare Island Naval Shipyard

The Mare Island Naval Shipyard was the first United States Navy base established on the Pacific Ocean. It is located 25 miles northeast of San Francisco in Vallejo, California. The Napa River goes through the Mare Island Strait and separates the peninsula shipyard from the main portion of the...

, 1 January 1947.

TCG Piri Reis (S 343)

In 1960, Mapiro was converted to a Fleet Snorkel submarine. On 18 March 1960 she was transferred on loan under the Military Assistance Program to Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

. The Turkish Navy

Turkish Navy

The Turkish Navy is the naval warfare service branch of the Turkish Armed Forces.- Ottoman fleet after Mudros :Following the demise of the Ottoman Empire in the aftermath of World War I, on November 3, 1918, the fleet commander of the Ottoman Navy, Liva Amiral Arif Pasha, ordered all flags to be...

 renamed her TCG Piri Reis (S 343), after Piri Reis

Piri Reis

Piri Reis was an Turkish Ottoman admiral, geographer and cartographer born between 1465 and 1470 and died in 1554 or 1555....

 (ca. 1465–1554), an Ottoman

Ottoman Empire

The Ottoman EmpireIt was usually referred to as the "Ottoman Empire", the "Turkish Empire", the "Ottoman Caliphate" or more commonly "Turkey" by its contemporaries...

 admiral

Admiral

Admiral is the rank, or part of the name of the ranks, of the highest naval officers. It is usually considered a full admiral and above vice admiral and below admiral of the fleet . It is usually abbreviated to "Adm" or "ADM"...

 and cartographer. She left San Francisco on 16 May 1960 for Istanbul

Istanbul

Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...

 via the Panama Canal

Panama Canal

The Panama Canal is a ship canal in Panama that joins the Atlantic Ocean and the Pacific Ocean and is a key conduit for international maritime trade. Built from 1904 to 1914, the canal has seen annual traffic rise from about 1,000 ships early on to 14,702 vessels measuring a total of 309.6...

, with her new Turkish crew. Piri Reis arrived in Gölcük on 23 June 1960. She was commissioned into Turkish Navy the day after.

The submarine was struck from the US Naval Register, and sold outright to Turkey, 1 August 1973; she was disposed of by the Turkish navy in 1973.