HMS ''Ruler'' was a of the British

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...

during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

. She was built in the United States as the carrier ''St. Joseph'' (AVG/CVE/ACV-50) for

Lend-Lease Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (), was a policy under which the United States supplied the United Kingdom, the Soviet Union and other Allied nations with food, oil, ...

to the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

. The name ''St. Joseph'' (making her the first

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

ship named for St. Joseph Bay,

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...

) was assigned to MC hull 261, a converted C3-S-A1 cargo ship, on 23 August 1942. She was laid down on 25 March 1943 by the Seattle-Tacoma Shipbuilding Corporation of

Tacoma, Washington Tacoma ( ) is the county seat of Pierce County, Washington, United States. A port city, it is situated along Washington's Puget Sound, southwest of Seattle, northeast of the state capital, Olympia, Washington, Olympia, and northwest of Mount ...

. She was redesignated CVE-50 on 15 July, launched on 21 August 1943 and sponsored by Mrs. W.W. Smyth. The carrier was transferred to the UK on 22 December 1943 and commissioned the same day as HMS ''Ruler'' with the

pennant number In the Royal Navy and other navies of Europe and the Commonwealth of Nations, ships are identified by pennant number (an internationalisation of ''pendant number'', which it was called before 1948). Historically, naval ships flew a flag that iden ...

D72. HMS ''Ruler'' served in the North

Atlantic The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe an ...

during 1944, protecting the vital flow of men and war

materiel Materiel (; ) refers to supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commercial supply chain context. In a military context, the term ''materiel'' refers either to the specifi ...

from the

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Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

and to fighting fronts on the European continent. In early 1945, she transferred to the Pacific Theatre where she supported a raid on Truk and the campaign to take Okinawa. From March to August 1945 was part of the British Pacific Fleet attached to the

30th Aircraft Carrier Squadron The 30th Aircraft Carrier Squadron also called Thirtieth Aircraft Carrier Squadron was a military formation of Escort Aircraft Carriers of the Royal Navy that was part of the British Pacific Fleet from January to August 1945. History The 30th Ai ...

. After the war ended, ''Ruler'' returned to the United States at

Norfolk, Virginia Norfolk ( ) is an independent city in the Commonwealth of Virginia in the United States. Incorporated in 1705, it had a population of 238,005 at the 2020 census, making it the third-most populous city in Virginia after neighboring Virginia Be ...

, on 28 January 1946. She was decommissioned from RN service on 29 January, and was accepted by the US Navy the same day. In excess of the Navy’s needs, she was slated for disposal and struck from the

Navy 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 20 March 1946. The ship was sold on 13 May and scrapped within the year.

Design and description

These ships were all larger and had a greater aircraft capacity than the preceding American built escort carriers. They were also all laid down as escort carriers and not converted

merchant ship A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are u ...

s. The ships had a complement of 646 men and an

overall length The overall length (OAL) of an ammunition cartridge is a measurement from the base of the brass shell casing to the tip of the bullet, seated into the brass casing. Cartridge overall length, or "COL", is important to safe functioning of reloads in ...

of , a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially localized grou ...

of and a draught of .Cocker (2008), p.82. Propulsion was provided by two boilers which were connected to a steam turbine; it drove a shaft giving 9,350 brake horsepower (SHP), which could propel the ship at .Cocker (2008), p.79. Aircraft facilities were a small combined bridge/flight control on the

starboard Port and starboard are nautical terms for watercraft and aircraft, referring respectively to the left and right sides of the vessel, when aboard and facing the bow (front). Vessels with bilateral symmetry have left and right halves which are ...

side, two aircraft lifts by , one aircraft catapult and nine

arrestor wires An arresting gear, or arrestor gear, is a mechanical system used to rapidly decelerate an aircraft as it lands. Arresting gear on aircraft carriers is an essential component of naval aviation, and it is most commonly used on CATOBAR and STOBA ...

.Cocker (2008), p.82. Aircraft could be housed in the by hangar below the flight deck. ''Ruler''s armament comprised: two 4"/50, 5"/38 or 5"/51 Dual Purpose guns in single mounts, sixteen 40 mm Bofors

anti-aircraft gun Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...

s in twin mounts and twenty 20 mm Oerlikon anti-aircraft cannons in single mounts. Each ship had a maximum aircraft capacity of twenty-four aircraft which could be a mixture of Grumman Martlets,

Vought F4U Corsair The Vought F4U Corsair is an American fighter aircraft which saw service primarily in World War II and the Korean War. Designed and initially manufactured by Chance Vought, the Corsair was soon in great demand; additional production contracts ...

s or

Hawker Sea Hurricane The Hawker Hurricane was a British single-seat fighter aircraft designed and predominantly built by Hawker Aircraft Ltd. Some versions were built in Canada by the Canada Car and Foundry Co Ltd British variants Hurricane Mk I ; Hurricane Mk I ( ...

fighter aircraft Fighter aircraft are fixed-wing military aircraft designed primarily for air-to-air combat. In military conflict, the role of fighter aircraft is to establish air superiority of the battlespace. Domination of the airspace above a battlefield ...

and Fairey Swordfish or

Grumman Avenger The Grumman TBF Avenger (designated TBM for aircraft manufactured by General Motors) is an American World War II-era torpedo bomber developed initially for the United States Navy and Marine Corps, and eventually used by several air and naval av ...

anti-submarine An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapo ...

torpedo bombers.

Notes

References

* *

External links

history.navy.mil: USS ''St. Joseph''

hazegray.org: USS ''St. Joseph''
{{DEFAULTSORT:Ruler (D72) Ships built in Tacoma, Washington 1943 ships Ruler-class escort carriers