USS ''Poseidon'' (ARL-12) was one of 39 ''Achelous''-class

landing craft Landing craft are small and medium seagoing watercraft, such as boats and barges, used to convey a landing force (infantry and vehicles) from the sea to the shore during an amphibious assault. The term excludes landing ships, which are larger. ...

repair ships built for the

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. Named for

Poseidon Poseidon (; ) is one of the twelve Olympians in ancient Greek religion and mythology, presiding over the sea, storms, earthquakes and horses.Burkert 1985pp. 136–139 He was the protector of seafarers and the guardian of many Hellenic cit ...

(the Greek god of the sea), she was the only ship U.S. Naval vessel to bear the name. Her keel was laid down as ''LST-1037'' by the

Boston Navy Yard The Boston Navy Yard, originally called the Charlestown Navy Yard and later Boston Naval Shipyard, was one of the oldest shipbuilding facilities in the United States Navy. It was established in 1801 as part of the recent establishment of t ...

Boston, Massachusetts Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...

, on 10 July 1944. She was renamed ''Poseidon'' and given

hull classification symbol The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration (NOAA) use a hull classification symbol (sometimes called hull code or hull number) to identify their ships by type and by ind ...

''ARL-12'' on 12 June 1944; launched on 24 August 1944; sponsored by Mrs. Nora T. Twomey; and placed in reduced commission on 22 September 1944. Following initial commissioning, ''Poseidon'' steamed south to

Baltimore, Maryland Baltimore is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 United States census, 2020 census and estimated at 568,271 in 2024, it is the List of United States ...

, where she decommissioned and completed conversion to a landing craft repair ship. Commissioned in full 13 February 1945, she completed shakedown in

Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Ea ...

and, assigned to ServRon 10, sailed for

Ulithi Ulithi (, , or ; pronounced roughly as YOU-li-thee) is an atoll in the Caroline Islands of the western Pacific Ocean, about east of Yap, within Yap State. Name The name of the island goes back to Chuukic languages, Proto-Chuukic ''*úlú-diw ...

, thence, in early June, to

Okinawa most commonly refers to: * Okinawa Prefecture, Japan's southernmost prefecture * Okinawa Island, the largest island of Okinawa Prefecture * Okinawa Islands, an island group including Okinawa itself * Okinawa (city), the second largest city in th ...

. There, at

Kerama Retto The are a subtropical island group southwest of Okinawa Island in Japan. Geography Four islands are inhabited: Tokashiki Island, Zamami Island, Aka Island, and Geruma Island. The islands are administered as Tokashiki Village and Zamami Vil ...

and at

Buckner Bay is a bay on the southern coast of Okinawa Island on the Pacific Ocean in Japan. The bay covers and ranges between to deep. The bay is surrounded by the municipalities of Uruma, Kitanakagusuku, Nakagusuku, Nishihara, Yonabaru, Nanjō, all ...

, she repaired landing and patrol craft until the cessation of hostilities. Ordered back to the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

after

for inactivation, she decommissioned on 30 November 1946 and was berthed with the Columbia River Group of the

Pacific Reserve Fleet The United States Navy maintains a number of its ships as part of a reserve fleet, often called the "Mothball Fleet". While the details of the maintenance activity have changed several times, the basics are constant: keep the ships afloat and s ...

. She remained a unit of that group until struck from the

Naval Vessel Register The ''Naval Vessel Register'' (NVR) 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 t ...

on 1 July 1961. She was sold 3 November 1961 to the Marine Power and Equipment Company of

Seattle, Washington Seattle ( ) is the List of municipalities in Washington, most populous city in the U.S. state of Washington (state), Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the List of Unit ...

. Her final fate is unknown.

References

* {{DEFAULTSORT:Poseidon (ARL-10) Achelous-class repair ships Achelous-class repair ships converted from LST-542-class ships World War II auxiliary ships of the United States Ships built in Boston 1944 ships