HMS ''Ruler'' was the

lead ship The lead ship, name ship, or class leader is the first of a series or class of ships that are all constructed according to the same general design. The term is applicable to naval ships and large civilian vessels. Large ships are very comple ...

of her class of

escort carrier The escort carrier or escort aircraft carrier (U.S. hull classification symbol CVE), also called a "jeep carrier" or "baby flattop" in the United States Navy (USN) or "Woolworth Carrier" by the Royal Navy, was a small and slower type of aircraf ...

of 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 ...

. 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 (),3,000 Hurricanes and >4,000 other aircraft) * 28 naval vessels: ** 1 Battleship. (HMS Royal Sovereign (05), HMS Royal Sovereign) * ...

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 Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

Construction

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

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 ...

ship named for St. Joseph Bay,

Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...

) 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 The Seattle-Tacoma Shipbuilding Corporation (also operating as Todd Pacific) was an American corporation which built escort carriers, destroyers, cargo ships and auxiliaries for the United States Navy and United States Merchant Marine, merchant ...

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, southwest of Bellevue, Washington, Bellevue, northeast of the state capital, Olympia ...

. 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 United Kingdom on 22 December 1943 and commissioned into Royal Navy service 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.

Operational history

After completing

sea trials 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 o ...

HMS ''Ruler'' went to

Burrard Dry Dock Burrard Dry Dock Ltd. was a Canadian shipbuilding company headquartered in North Vancouver, British Columbia. Together with neighbouring North Van Ship Repair and Yarrows Ltd. of Esquimalt, which were both later purchased by the company, Bur ...

, in

Vancouver Vancouver is a major city in Western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the cit ...

British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

, for refit to Royal Navy standards, as a transport carrier. Following a work-up period HMS ''Ruler'' went to

Norfolk, Virginia Norfolk ( ) is an independent city (United States), independent city in the U.S. state of Virginia. It had a population of 238,005 at the 2020 United States census, 2020 census, making it the List of cities in Virginia, third-most populous city ...

, via the

Panama Canal The Panama Canal () is an artificial waterway in Panama that connects the Caribbean Sea with the Pacific Ocean. It cuts across the narrowest point of the Isthmus of Panama, and is a Channel (geography), conduit for maritime trade between th ...

. It departed on 20 April 1944 with a number of

Grumman F6F Hellcat The Grumman F6F Hellcat is an American Carrier-based aircraft, carrier-based fighter aircraft of World War II. Designed to replace the earlier Grumman F4F Wildcat, F4F Wildcat and to counter the Japanese Mitsubishi A6M Zero, it was the United St ...

and

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

, transferring them to RNAS Speke in

Liverpool Liverpool is a port City status in the United Kingdom, city and metropolitan borough in Merseyside, England. It is situated on the eastern side of the River Mersey, Mersey Estuary, near the Irish Sea, north-west of London. With a population ...

, England, the aircraft disembarking on 6 May 1944. HMS ''Ruler'' returned to the United States, to

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

, to fetch a batch of

Grumman TBF 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 a ...

and Grumman F6F Hellcat aircraft, embarking them between the 20 and 23 May 1944 and again transferring to RNAS Speke, on 11 June. HMS ''Ruler'' later made a third trip, fetching Grumman F6F Hellcat and Vought F4U Corsair from Norfolk, Virginia, between 20 and 29 October, this time arriving at

Greenock Greenock (; ; , ) is a town in Inverclyde, Scotland, located in the west central Lowlands of Scotland. The town is the administrative centre of Inverclyde Council. It is a former burgh within the historic county of Renfrewshire, and forms ...

to unload on 18 November. HMS ''Ruler'' served in the North

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 se ...

during 1944, protecting the vital flow of men and war

materiel Materiel or matériel (; ) is supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commerce, commercial supply chain management, supply chain context. Military In a military context, ...

from 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 ...

Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...

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 The British Pacific Fleet (BPF) was a Royal Navy formation that saw action against Japan during the Second World War. It was formed from aircraft carriers, other surface warships, submarines and supply vessels of the RN and British Commonwealth ...

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 A ...

. She entered

Tokyo Bay is a bay located in the southern Kantō region of Japan spanning the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture, on the southern coast of the island of Honshu. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. Th ...

on 31 August 1945 prior to the

Surrender of Japan The surrender of the Empire of Japan in World War II was Hirohito surrender broadcast, announced by Emperor Hirohito on 15 August and formally Japanese Instrument of Surrender, signed on 2 September 1945, End of World War II in Asia, ending ...

. On 13 September, the ship brought onboard some 450 ex Prisoners of War and sailed for

Sydney Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...

in Australia, arriving 27 September where she was greeted by the Governor-General of Australia,

Prince Henry, Duke of Gloucester Prince Henry, Duke of Gloucester (Henry William Frederick Albert; 31 March 1900 – 10 June 1974) was a member of the British royal family. He was the third son of King George V and Mary of Teck, Queen Mary, and was a younger brother of kings E ...

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

, 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 ...

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 i ...

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 *Radio beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially lo ...

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 Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are th ...

(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 Glossary of nautical terms (M-Z), nautical terms for watercraft and spacecraft, referring respectively to the left and right sides of the vessel, when aboard and facing the Bow (watercraft), bow (front). Vessels with bil ...

side, two aircraft lifts by , one

aircraft catapult An aircraft catapult is a device used to help fixed-wing aircraft gain enough airspeed and lift for takeoff from a limited distance, typically from the deck of a ship. They are usually used on aircraft carrier flight decks as a form of assist ...

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 (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-ba ...

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 Martlet The Grumman F4F Wildcat is an American carrier-based fighter aircraft that entered service in 1940 with the United States Navy, and the British Royal Navy where it was initially known as the Martlet. First used by the British in the North Atla ...

s or

Hawker Sea Hurricane The Hawker Hurricane was a British single-seat fighter aircraft designed and predominantly built by Hawker Aircraft. Some models were built in Canada by Canadian Car and Foundry. British variants Hurricane Mk I Hurricane Mk I (Early producti ...

fighter aircraft Fighter aircraft (early on also ''pursuit aircraft'') are military aircraft designed primarily for air-to-air combat. In military conflict, the role of fighter aircraft is to establish air supremacy, air superiority of the battlespace. Domina ...

and

Fairey Swordfish The Fairey Swordfish is a retired biplane torpedo bomber, designed by the Fairey Aviation Company. Originating in the early 1930s, the Swordfish, nicknamed "Stringbag", was principally operated by the Fleet Air Arm of the Royal Navy. It was a ...

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 weapon ...

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