River-class frigate

The Black Swan class and Modified Black Swan class were two classes of sloop of the Royal Navy and Royal Indian Navy. Twelve Black Swans were launched between 1939 and 1943, including four for the Royal Indian Navy; twenty-five Modified Black Swans were launched between 1942 and 1945, including two for the Royal Indian Navy; several other ships were cancelled.

A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common features of all types. The main types are: the internal combustion engine, used extensively in motor vehicles; the steam engine, the mainstay of the Industrial Revolution; and the Stirling engine for niche applications. Internal combustion engines are further classified in two ways: either a spark-ignition (SI) engine, where the spark plug initiates the combustion; or a compression-ignition (CI) engine, where the air within the cylinder is compressed, thus heating it, so that the heated air ignites fuel that is injected then or earlier.

The Flower-class corvette was a British class of 294 corvettes used during World War II by the Allied navies particularly as anti-submarine convoy escorts in the Battle of the Atlantic. Royal Navy ships of this class were named after flowers.

A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war.

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 France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service.

"Aft", in nautical terminology, is an adjective or adverb meaning towards the stern (rear) of the ship, aircraft or spacecraft, when the frame of reference is within the ship, headed at the fore. For example, "Able Seaman Smith; lie aft!" or "What's happening aft?".

HMCS Valleyfield was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as a convoy escort in the Battle of the Atlantic. She was torpedoed and sunk in May 1944, the only River-class frigate lost by the RCN. She was named for Salaberry-de-Valleyfield, Quebec.

The Hedgehog was a forward-throwing anti-submarine weapon that was used primarily during the Second World War. The device, which was developed by the Royal Navy, fired up to 24 spigot mortars ahead of a ship when attacking a U-boat. It was deployed on convoy escort warships such as destroyers and corvettes to supplement the depth charges.

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

The Colony-class frigates were a series of 21 frigates constructed in the United States by Walsh-Kaiser of Providence, Rhode Island for transfer under Lend-Lease to the Royal Navy in 1944. They were given the names of relatively minor colonies as names of large colonies had been used for the Crown Colony-class cruisers.

The Loch class was a class of anti-submarine (A/S) frigate built for the Royal Navy and her Allies during World War II. They were an innovative design based on the experience of three years of fighting in the Battle of the Atlantic and attendant technological advances. Some shipyards had trouble building these larger ships, which led to widespread use of the Castle-class corvette, introduced around the same time.

The Bay class was a class of 26 anti-aircraft (A/A) frigates built for the Royal Navy under the 1943 War Emergency Programme during World War II. They were based on the hulls of incomplete Loch class anti-submarine (A/S) frigates.

HMCS Chebogue was a River-class frigate that served with the Royal Canadian Navy during the Second World War. She served primarily as an ocean convoy escort in the Battle of the Atlantic. She was named for Chebogue, Nova Scotia. During the war she was torpedoed and declared a constructive loss.

Algeria, officially the People's Democratic Republic of Algeria, is a country in North Africa. Algeria is bordered to the northeast by Tunisia; to the east by Libya; to the southeast by Niger; to the southwest by Mali, Mauritania, and Western Sahara; to the west by Morocco; and to the north by the Mediterranean Sea. It is considered part of the Maghreb region of North Africa. It has a semi-arid geography, with most of the population living in the fertile north and the Sahara dominating the geography of the south. Algeria covers an area of 2,381,741 square kilometres (919,595 sq mi), making it the world's tenth largest nation by area, and the largest nation in Africa, being more than 200 times as large as the smallest country in the continent, The Gambia. With a population of 44 million, Algeria is the tenth-most populous country in Africa, and the 32nd-most populous country in the world. The capital and largest city is Algiers, located in the far north on the Mediterranean coast.

HMCS Magog was a River-class frigate that served in the Royal Canadian Navy (RCN) during the Second World War. She was used primarily as a convoy escort. On 14 October 1944, she was torpedoed by U-1223. She survived the attack, was towed to port and declared a constructive total loss. Magog was named for the town of Magog, Quebec.

Brisbane is the capital and most populous city of Queensland, and the third-most populous city in Australia and Oceania with a population of approximately 2.6 million. Brisbane lies at the centre of South East Queensland, which includes several other regional centres and cities. The central business district is situated within a peninsula of the Brisbane River about 15 km (9 mi) from its mouth at Moreton Bay. Brisbane is located in the hilly floodplain of the Brisbane River Valley between Moreton Bay and the Taylor and D'Aguilar mountain ranges. It sprawls across several local government areas, most centrally the City of Brisbane. The demonym of Brisbane is Brisbanite.

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, and mountain ranges in the south-east.

HMAS Diamantina (K377/F377/A266/GOR266), named after the Diamantina River in Queensland, is a River-class frigate that served the Royal Australian Navy (RAN). Constructed in the mid-1940s, Diamantina was active from 1945 until 1946, was placed in reserve, then was recommissioned as a survey ship from 1959 until 1980.

HMCS Stormont is a former River-class frigate that served in the Royal Canadian Navy during the Second World War. She fought primarily in the Battle of the Atlantic, but saw service in the Arctic Ocean. She was named for Stormont, Ontario. After the war she was turned into the luxury yacht Christina by Greek billionaire Aristotle Onassis. She continues to sail.

The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II. At its core was the Allied naval blockade of Germany, announced the day after the declaration of war, and Germany's subsequent counter-blockade. The campaign peaked from mid-1940 through to the end of 1943.

Aristotle Socrates Onassis, was a Greek-Argentinian shipping magnate who amassed the world's largest privately-owned shipping fleet and was one of the world's richest and most famous men. He was married to Athina Mary Livanos, had a long-standing affair with opera singer Maria Callas and was married to Jacqueline Kennedy, the widow of US President John F. Kennedy.

A superyacht or megayacht is a large and luxurious pleasure vessel. There are no official or agreed upon definitions for such yachts, but these terms are regularly used to describe professionally crewed motor or sailing yachts, ranging from 40 metres (130 ft) to more than 180 metres (590 ft) in length, and sometimes include yachts as small as 24 metres (79 ft).

Christina O is a private motor yacht that once belonged to billionaire Greek shipowner Aristotle Onassis. At 99.13 metres long, she is the 59th largest yacht in the world as of 2022.

Christina Onassis was a Greek businesswoman, socialite, and heiress to the Onassis fortune. She was the only daughter of Aristotle Onassis and Athina Mary Livanos.

SLNS Gajabahu was a River-class frigate of the Sri Lanka Navy. She has since been converted to a training ship for the Naval & Maritime Academy, Trincomalee. She was originally HMCS Hallowell of the Royal Canadian Navy, built during the Second World War and then saw service as INS Miznak of the Israeli Navy. The Royal Ceylon Navy purchased her in 1958 from Israel.

Myanmar, officially the Republic of the Union of Myanmar, also known as Burma, is a country in Southeast Asia. It is the largest country by area in Mainland Southeast Asia, and had a population of about 54 million in 2017. It is bordered by Bangladesh and India to its northwest, China to its northeast, Laos and Thailand to its east and southeast, and the Andaman Sea and the Bay of Bengal to its south and southwest. The country's capital city is Naypyidaw, and its largest city is Yangon.

Lieutenant Commander Nicholas John Turney Monsarrat FRSL RNVR was a British novelist known for his sea stories, particularly The Cruel Sea (1951) and Three Corvettes (1942–45), but perhaps known best internationally for his novels, The Tribe That Lost Its Head and its sequel, Richer Than All His Tribe.

John Edward Hawkins, CBE was an English actor who worked on stage and in film from the 1930s until the 1970s. One of the most popular British film stars of the 1950s, he was known for his portrayal of military men.

The Cruel Sea is a 1953 British war film starring Jack Hawkins, Donald Sinden, Denholm Elliott, Stanley Baker, Liam Redmond, Virginia McKenna and Moira Lister. Made by Ealing Studios seven years after the end of the Second World War, it was directed by Charles Frend and produced by Leslie Norman.

A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war.

Marion Robert Morrison, professionally known as John Wayne and nicknamed The Duke or Duke Wayne, was an American actor who became a popular icon through his starring roles in films which were produced during Hollywood's Golden Age, especially through his starring roles in Western and war movies. His career flourished from the silent era of the 1920s through the American New Wave, as he appeared in a total of 179 film and television productions. He was among the top box-office draws for three decades, and he appeared with many other important Hollywood stars of his era. In 1999, the American Film Institute selected Wayne as one of the greatest male stars of classic American cinema.

The Sea Chase is a 1955 World War II drama film starring John Wayne and Lana Turner, and featuring David Farrar, Lyle Bettger, and Tab Hunter. It was directed by John Farrow from a screenplay by James Warner Bellah and John Twist based on the novel of the same name by Andrew Geer. The plot is a nautical cat and mouse adventure, with Wayne determined to get his freighter home to Germany during the opening months of World War II, chased relentlessly across the Pacific then Atlantic oceans by the Australian and then British navies.

Alistair Stuart MacLean was a Scottish novelist who wrote popular thrillers and adventure stories. Many of his novels have been adapted to film, most notably The Guns of Navarone (1957) and Ice Station Zebra (1963). In the late 1960s, encouraged by film producer Elliott Kastner, MacLean began to write original screenplays, concurrently with an accompanying novel. The most successful was the first of these, the 1968 film Where Eagles Dare, which was also a bestselling novel. MacLean also published two novels under the pseudonym Ian Stuart. His books are estimated to have sold over 150 million copies, making him one of the best-selling fiction authors of all time.

HMS Ulysses was the debut novel by Scottish author Alistair MacLean. Originally published in 1955, it was also released by Fontana Books in 1960. MacLean's experiences in the Royal Navy during World War II provided the background and the Arctic convoys to Murmansk provided the basis for the story, which was written at a publisher's request after he'd won a short-story competition the previous year.