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|Builder:||Portsmouth Naval Shipyard, Kittery, Maine|
|Laid down:||8 March 1944|
|Launched:||6 June 1944|
|Commissioned:||22 August 1944|
|Decommissioned:||2 December 1968|
|Struck:||2 December 1968|
|Fate:||Sold for scrap, 15 June 1973|
|Class and type:||Balaoclass diesel-electric submarine|
|Length:||311 ft 8 in (95.00 m)|
|Beam:||27 ft 3 in (8.31 m)|
|Draft:||16 ft 10 in (5.13 m) maximum|
|Range:||11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)|
|Test depth:||400 ft (120 m)|
|Complement:||10 officers, 70–71 enlisted|
USS Sennet (SS-408) was a Balao-class submarine, a ship of the United States Navy named for the sennet, a barracuda.
A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub.
The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. It is the largest and most capable navy in the world and it has been estimated that in terms of tonnage of its active battle fleet alone, it is larger than the next 13 navies combined, which includes 11 U.S. allies or partner nations. with the highest combined battle fleet tonnage and the world's largest aircraft carrier fleet, with eleven in service, and two new carriers under construction. With 319,421 personnel on active duty and 99,616 in the Ready Reserve, the Navy is the third largest of the service branches. It has 282 deployable combat vessels and more than 3,700 operational aircraft as of March 2018, making it the second-largest air force in the world, after the United States Air Force.
The northern sennet, Sphyraena borealis, is an ocean-going species of fish in the barracuda family, Sphyraenidae. It was described by the American zoologist James Ellsworth De Kay in 1842. De Kay's description was part of several volumes he published regarding the fauna of New York from 1842-1849. Northern sennet are also known as northern barracuda. While generally considered a gamefish it has only rarely been used as food by humans.
Sennet was laid down on 8 March 1944 by the Portsmouth Navy Yard in Kittery, Maine, launched on 6 June 1944, sponsored by Mrs. Roscoe W. Downs, and commissioned on 22 August 1944, Commander George E. Porter in command.
Kittery is a town in York County, Maine, United States. 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. The town is a tourist destination known for its many outlet stores.
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 forces. The ceremonies involved are often rooted in centuries old naval tradition.
Sennet was fitted out by 18 September. She held training exercises and torpedo-tube testing off the coast of Connecticut and Rhode Island until 22 October. The submarine then tested mines and torpedoes for the Mine Warfare Test Station, Solomons Island, Md. On 11 November, Sennet proceeded to the operations area off Balboa, C. Z. and conducted further training exercises. The submarine departed Balboa on 29 November for Pearl Harbor and arrived there on 16 December 1944.
Connecticut is the southernmost state in the New England region of the United States. As of the 2010 Census, it has the highest per-capita income, Human Development Index (0.962), and median household income in the United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its capital is Hartford and its most populous city is Bridgeport. It is part of New England, although portions of it are often grouped with New York and New Jersey as the Tri-state area. The state is named for the Connecticut River which approximately bisects the state. The word "Connecticut" is derived from various anglicized spellings of an Algonquian word for "long tidal river".
Rhode Island, officially the State of Rhode Island and Providence Plantations, is a state in the New England region of the United States. It is the smallest state in area, the seventh least populous, the second most densely populated, and it has the longest official name of any state. Rhode Island is bordered by Connecticut to the west, Massachusetts to the north and east, and the Atlantic Ocean to the south via Rhode Island Sound and Block Island Sound. It also shares a small maritime border with New York. Providence is the state capital and most populous city in Rhode Island.
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones.
Sennet's topside armament was increased to two 5-inch (130 mm) guns, two 40 millimeter guns, and three .50 caliber machine guns before departing Pearl Harbor for her first war patrol on 5 January 1945.
Sennet patrolled north of the Bonin Islands until 28 January. She made two attacks on a large tanker with three escorts on 21 January but scored no hits. The following week, the submarine sank one 500-ton picket boat and damaged another.
The Bonin Islands, also known as the Ogasawara Islands, or, Yslas del Arzobispo, are an archipelago of over 30 subtropical and tropical islands, some 1,000 kilometres directly south of Tokyo, Japan. The name "Bonin Islands" comes from the Japanese word bunin, meaning "no people" or "uninhabited". The only inhabited islands of the group are Chichijima (父島), the seat of the municipal government, and Hahajima (母島).
A tanker is a ship designed to transport or store liquids or gases in bulk. Major types of tankship include the oil tanker, the chemical tanker, and gas carrier. Tankers also carry commodities such as vegetable oils, molasses and wine. In the United States Navy and Military Sealift Command, a tanker used to refuel other ships is called an oiler but many other navies use the terms tanker and replenishment tanker.
Sennet refitted at Saipan from 31 January to 7 February, when she began her second war patrol off southern Honshū, Japan. On 13 February, two 300-ton picket boats were sunk by the combined gunfire of Sennet, Haddock (SS-231), and Lagarto (SS-371).
Saipan is the largest island of the Northern Mariana Islands, a commonwealth of the United States in the western Pacific Ocean. According to 2017 estimates by the United States Census Bureau, Saipan's population was 52,263.
Japan is an island country in East Asia. Located in the Pacific Ocean, it lies off the eastern coast of the Asian continent and stretches from the Sea of Okhotsk in the north to the East China Sea and the Philippine Sea in the south.
USS Haddock (SS-231), a Gato-class submarine, was the second submarine of the United States Navy to be named for the haddock, a small edible Atlantic fish, related to the cod. A previous submarine had been named Haddock (SS-32), but was renamed K-1 prior to her launching, so Haddock (SS-231) was the first to actually bear the name.
Three days later, the submarine attacked enemy minelayer the Nariu with an offset spread of torpedoes from her stern tubes, then went deep to 200 feet (60 m). Two torpedoes were heard to explode. While going deep, Sennet was rocked hard by two aircraft bombs which exploded beneath her. The submarine surfaced an hour later and saw a large oil slick and approximately 40 Japanese clinging to debris but no trace of the Nariu which had sunk.
Minelaying is the act of deploying explosive mines. Historically this has been carried out by ships, submarines and aircraft. Additionally, since World War I the term minelayer refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for installing controlled mines at predetermined positions in connection with coastal fortifications or harbor approaches that would be detonated by shore control when a ship was fixed as being within the mine's effective range.
Sennet was refitted by Apollo (AS-25) in Apra Harbor, Guam, 9 March – 2 April. Patrolling off Honshū again from 3 April to 16 May, she was twice straddled by torpedoes fired from patrol boats while she was surfaced off Miki Saki on 16 April. Three days later, the submarine torpedoed and sank the cargo ship Hagane Maru. On 22 April, Sennet attempted to save a P-51 pilot who had bailed out near her but the man went under only 100 feet (30 m) from the ship. Attempts to find him were in vain.
A repair ship was attacked on 28 April with two electrical torpedoes. The first blew the bow off and the second hit under the mainmast. Hatsushima sank by her stern. On 1 May, Sennett fired five steam torpedoes at an Asashio-class destroyer but it maneuvered and avoided them. At the end of this patrol, the submarine sailed to Pearl Harbor for upkeep and leave.
Sennet's most profitable patrol was from 1 July to 9 August in the Sea of Japan. During the patrol, she sank one passenger-cargo ship, two cargo ships, and one tanker totaling 13,105 tons.
When the war ended in the Pacific, Sennet was assigned to the Atlantic Fleet and operated from New London, Conn. In June 1946, she was reassigned to Submarine Squadron 6 (SubRon 6) at Balboa, C.Z. From 10 December 1946 to 13 March 1947, Sennet participated in Operation Highjump, the third Byrd Antarctic Expedition. Sennet used the first basic under-ice sonar to establish the feasibility of United States under-ice operations.
Sennet operated from Balboa until 1949 when she was assigned to operate from Key West, Fla., as a unit of Submarine Squadron 12 (SubRon 12). The ship conducted training for submarine and antisubmarine personnel at Key West and Guantanamo Bay, Cuba. In 1951, Sennet was converted to a Fleet Snorkel submarine at the Philadelphia Naval Shipyard and returned to her homeport.
On 4 November 1954, Sennet departed Key West on her first deployment to the Mediterranean and service with the 6th Fleet. From her return on 30 January 1955 until 1 August 1959, the submarine conducted training, local, and fleet operations with her squadron. On 1 August, Sennett was reassigned to SubRon 4 and stationed at Charleston, S.C. For the next nine years, the submarine operated from Charleston with the Atlantic Fleet. She operated along the east coast, in the Caribbean, and in the Atlantic with her squadron until mid-1968.
In November 1968, the submarine was found unfit for further Naval service. Sennet was struck from the Navy list on 2 December 1968. On 18 May 1973, her hulk was sold to Southern Scrap Material Co. Ltd., New Orleans, La.
Sennett received four battle stars for World War II service.
USS Runner (SS/AGSS-476), a Tench-class submarine, was the second ship of the United States Navy to be named for the runner, an amberfish inhabiting subtropical waters. Her keel was laid down on 10 July 1944 by the Portsmouth Naval Shipyard of Kittery, Maine. She was launched on 17 October 1944 sponsored by Mrs. R.H. Bass, the wife of the prospective commanding officer, and commissioned on 6 February 1945 with Commander R.H. Bass in command.
USS Stickleback (SS-415), a Balao-class submarine, was named for the stickleback, a small scaleless fish.
USS Gunnel (SS-253), a Gato-class submarine, was the only ship of the United States Navy to be named for the gunnel.
USS Bergall (SS-320), a Balao-class submarine, was the first ship of the United States Navy to be named for the bergall, a small fish of the New England coast. Her keel was laid down by the Electric Boat Company in Groton, Connecticut. She was later sold to Turkey and operated as TCG Turgutreis until scrapped in April 2000.
USS Greenling (SS-213), a Gato-class submarine, was the first ship of the United States Navy to be named for the greenling.
USS Bream (SS/SSK/AGSS-243), a Gato-class submarine, was the first ship of the United States Navy to be named for the bream.
USS Haddo (SS-255), a Gato-class submarine, was the first ship of the United States Navy to be named for the haddo.
USS Mingo (SS-261) — a Gato-class submarine — was the first ship of the United States Navy to be named for the mingo snapper.
USS Muskallunge (SS-262), a Gato-class submarine, was a ship of the United States Navy named for the muskallunge.
USS Ray (SS/SSR-271), a Gato-class submarine, was the first ship of the United States Navy to be named for the ray, a fish characterized by a flat body, large pectoral fins, and a whiplike tail.
USS Steelhead (SS-280), a Gato-class submarine, was a ship of the United States Navy named for the steelhead, a North American trout found from California to Alaska.
USS Sunfish (SS-281), a Gato-class submarine, was the first ship of the United States Navy to be named for the ocean sunfish, Mola Mola, a plectognath marine fish, having a deep body truncated behind, and high dorsal and anal fins.
USS Guavina (SS/SSO/AGSS/AOSS-362), a Gato-class submarine, was a ship of the United States Navy named for the guavina, a fish which may reach a length of 2 feet (0.6 m) indigenous to the West Indies and the Atlantic coasts of Central America and Mexico.
USS Hardhead (SS-365), a Balao-class submarine, was a ship of the United States Navy named for the hardhead, a fish of the croaker family. Hardhead received six battle stars for World War II service. All six of her combat patrols were "successful".
USS Sea Poacher (SS/AGSS-406), a Balao-class submarine, was a vessel of the United States Navy named for the sea poacher, a slender, mailed fish of the North Atlantic.
USS Hammerhead (SS-364), a Gato-class submarine, was the first ship of the United States Navy to be named for the hammerhead shark; a shark found in warm seas with a flattened anterior forward of the gill slits, presenting a hammer-like silhouette when viewed from above.
USS Segundo (SS-398) was a Balao-class submarine, of the United States Navy named for the segundo, a cavalla fish of Caribbean waters.
USS Sea Owl (SS/AGSS-405), a Balao-class submarine, was a ship of the United States Navy named for the sea owl, a lumpfish of the North Atlantic.
USS Sea Robin (SS-407), a Balao-class submarine, was a vessel of the United States Navy named for the sea robin. This is a spiny-finned fish with red or brown coloring on its body and fins. The first three rays of its pectoral fin separate from the others and are used in walking on the sea bottom.