MV ''Carnarvon Castle'' was an

ocean liner An ocean liner is a type of passenger ship primarily used for transportation across seas or oceans. Ocean liners may also carry cargo or mail, and may sometimes be used for other purposes (such as for pleasure cruises or as hospital ships). The ...

of the

Union-Castle Line The Union-Castle Line was a British shipping line that operated a fleet of passenger liners and cargo ships between Europe and Africa from 1900 to 1977. It was formed from the merger of the Union Line and Castle Shipping Line. It merged with ...

. She was requisitioned for service as an

auxiliary cruiser An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in lo ...

by the

Royal Navy during the Second World War The Royal Navy was an important component of the Allied forces during the Second World War and made a significant contribution to the victory over the Axis powers. Its main tasks included the protection of merchant ships in the Atlantic against ...

Construction and early career

''Carnarvon Castle'' was built by

Harland & Wolff Harland & Wolff Holdings plc is a British shipbuilding and Metal fabrication, fabrication company headquartered in London with sites in Belfast, Arnish yard, Arnish, Appledore, Torridge, Appledore and Methil. It specialises in ship repair, ship ...

Belfast Belfast (, , , ; from ) is the capital city and principal port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel (Great Britain and Ireland), North Channel ...

and launched on 14 January 1926. She was completed on 26 June 1926 and entered service for the

. She was named after

Caernarfon Castle Caernarfon Castle (; ) is a medieval fortress in Gwynedd, north-west Wales. The first fortification on the site was a motte-and-bailey castle built in the late 11th century, which King Edward I of England began to replace with the current st ...

. She was the first of the Union-Castle mail ships to exceed 20,000 tons and was the first motor ship to be used on the sailings between Britain and the

Cape of Good Hope The Cape of Good Hope ( ) is a rocky headland on the Atlantic Ocean, Atlantic coast of the Cape Peninsula in South Africa. A List of common misconceptions#Geography, common misconception is that the Cape of Good Hope is the southern tip of Afri ...

. She had two squat funnels, the foremost being a dummy. She served on the route until 1936, when a revised contract to carry the mails required a speed of at least , which would result in a voyage to the Cape lasting no more than days. ''Carnarvon Castle'' required a refit and was reworked by her original builders between 1937 and 1938. Her engines were replaced, a single funnel replaced the original two and her passenger capacity was altered. After undergoing

sea trial A sea trial or trial trip is the testing phase of a watercraft (including boats, ships, and submarines). It is also referred to as a "shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on op ...

s on 26 June 1938, she returned to her original route on 8 July, setting a new record for the passage to the Cape of 12 days, 13 hours, 38 minutes. The record stood until 1954.

War service

''Carnarvon Castle'' was at

Cape Town Cape Town is the legislature, legislative capital city, capital of South Africa. It is the country's oldest city and the seat of the Parliament of South Africa. Cape Town is the country's List of municipalities in South Africa, second-largest ...

at the outbreak of the Second World War, and was requisitioned by the Royal Navy on 8 September 1939. She sailed to the naval base at Simonstown and was converted to an

armed merchant cruiser An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in lo ...

. Commissioned as HMS ''Carnarvon Castle'' on 9 October, she sailed into the

South Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for ...

. On 5 December 1940 she encountered the and had a five-hour running battle with her. She suffered heavily in the battle, sustaining 27 hits and suffering 4 dead and 27 wounded. ''Thor'' was apparently undamaged in the encounter. ''Carnarvon Castle'' put into

Montevideo Montevideo (, ; ) is the capital city, capital and List of cities in Uruguay, largest city of Uruguay. According to the 2023 census, the city proper has a population of 1,302,954 (about 37.2% of the country's total population) in an area of . M ...

for repairs with steel plate reportedly salvaged from the . Postcard RMMV Carnarvon Castle

''Carnarvon Castle''s career as an armed merchant cruiser came to an end when she was decommissioned in December 1943. There were plans to convert her into an

aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and hangar facilities for supporting, arming, deploying and recovering carrier-based aircraft, shipborne aircraft. Typically it is the ...

but these were abandoned and she underwent a conversion to a

troopship A troopship (also troop ship or troop transport or trooper) is a ship used to carry soldiers, either in peacetime or wartime. Troopships were often drafted from commercial shipping fleets, and were unable to land troops directly on shore, typic ...

New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...

in 1944. She remained on trooping duties after the war and was finally released from naval service in March 1947. Returned to her original owners, she was back on the route to South Africa by June 1947. With her trooping accommodation only marginally upgraded, she carried a flood of post war emigrants from Britain on low cost assisted passages to East and South Africa. She was again refitted, to more luxurious standards, by Harland and Wolff in early 1949. Resuming service on 15 June 1950, she served until her retirement and sale. She arrived at Mihara, Japan on 8 September 1963 and was scrapped.

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{{DEFAULTSORT:Carnarvon Castle 1926 ships Ships built by Harland and Wolff Ships built in Belfast World War II Auxiliary cruisers of the Royal Navy World War II auxiliary ships of the United Kingdom Troop ships of the Royal Navy Uruguay in World War II Ships of the Union-Castle Line