HMS Heartsease (K15)

Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship.

Belfast is the capital and largest city of Northern Ireland, standing on the banks of the River Lagan on the east coast. It is the 12th-largest city in the United Kingdom and the second-largest in Ireland. It had a population of 345,418 in 2021.

German submarine U-100 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II.

German submarine U-103 was a Type IXB U-boat of Nazi Germany's Kriegsmarine that operated during World War II. She was one of the most successful boats in the entire war, sinking 237,596 gross register tons (GRT) of Allied shipping in 11 patrols, in a career lasting more than four years.

Rockall is an uninhabitable granite islet in the North Atlantic Ocean. The United Kingdom claims that Rockall lies within its territorial sea and is part of its territory, but this claim is not recognised by Ireland. It and the nearby skerries of Hasselwood Rock and Helen's Reef are the only emergent parts of the Rockall Plateau. The rock was formed by magmatism as part of the North Atlantic Igneous Province during the Paleogene.

The SS Carsbreck was a British cargo steamship. She was sunk while carrying supplies to the UK in the Second World War.

The Hunt class was a class of escort destroyer of the Royal Navy. The first vessels were ordered early in 1939, and the class saw extensive service in the Second World War, particularly on the British east coast and Mediterranean convoys. They were named after British fox hunts. The modern Hunt-class GRP hulled mine countermeasure vessels maintain the Hunt names lineage in the Royal Navy.

In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or battle group and defend them against powerful short-range attackers. They were originally developed in 1885 by Fernando Villaamil for the Spanish Navy as a defense against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War.

HMS Tetcott was a Type II British Hunt-class destroyer built for the Royal Navy during World War II. She was the only Royal Navy ship to be named after the Tetcott fox hunt.

The Irish Sea is an extensive body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Channel. Anglesey, North Wales, is the largest island in the Irish Sea, followed by the Isle of Man. The term Manx Sea may occasionally be encountered.

Greenland is an island country in North America and part of the Kingdom of Denmark. It lies between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is the world's largest island. It is one of three countries that form the Kingdom of Denmark, the others being Denmark and the Faroe Islands; the citizens of all these countries are citizens of Denmark and of the European Union. The capital of Greenland is Nuuk.

Argentina, officially the Argentine Republic, is a country in the southern half of South America. Argentina covers an area of 2,780,400 km2 (1,073,500 sq mi), making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a federal state subdivided into twenty-three provinces, and one autonomous city, which is the federal capital and largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system. Argentina claims sovereignty over the Falkland Islands, South Georgia and the South Sandwich Islands, and a part of Antarctica.

Iceland is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which is home to about 36% of the population. Iceland is the largest part of the Mid-Atlantic Ridge that rises above sea level, and its central volcanic plateau is erupting almost constantly. The interior consists of a plateau characterised by sand and lava fields, mountains, and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite a high latitude just outside the Arctic Circle. Its high latitude and marine influence keep summers chilly, and most of its islands have a polar climate.

Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 475,807.63 km2 (182,812 mi.2), including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago.

Johor, also spelled as Johore, is a state of Malaysia in the south of the Malay Peninsula. Johor has land borders with the Malaysian states of Pahang to the north and Malacca and Negeri Sembilan to the northwest. Johor shares maritime borders with Singapore to the south and Indonesia to both the west and east. Johor Bahru is the capital city and the economic centre of the state, Kota Iskandar is the seat of the state government, and Muar serves as the royal town of the state. The old state capital is Johor Lama. As of 2020, the state's population is 4.01 million, making it the second most populated state in Malaysia. Johor has highly diverse tropical rainforests and an equatorial climate. The state's mountain ranges form part of the Titiwangsa Range, which is part of the larger Tenasserim Range connected to Thailand and Myanmar, with Mount Ophir being the highest point in Johor. While its state capital, Johor Bahru, which is located within Iskandar Malaysia development corridor, is one of the most densely populated and fastest-growing urban areas in Malaysia.

The Malay Peninsula is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area contains Peninsular Malaysia, Southern Thailand, and the southernmost tip of Myanmar (Kawthaung). The island country of Singapore also has historical and cultural ties with the region. The indigenous people of the peninsula are the Malays, an Austronesian people.

The Revolutionary Government of the Republic of Indonesia was a revolutionary government set up in Sumatra to oppose the central government of Indonesia in 1958.

Sukarno or Soekarno was an Indonesian statesman, orator, revolutionary, and nationalist who was the first president of Indonesia, serving from 1945 to 1967.

Permesta was a rebel movement in Indonesia that was declared on 2 March 1957 by civil and military leaders in East Indonesia. Initially the center of the movement was in Makassar, which at that time was the capital of the province of Sulawesi. However, support for the movement in South Sulawesi gradually dissipated, forcing the headquarters to move to Manado in North Sulawesi.

North Sulawesi is a province of Indonesia. It is located on the Minahasa Peninsula of the island of Sulawesi, south of the Philippines and southeast of Sabah, Malaysia. It borders the Philippine province of Davao Occidental and Soccsksargen regions of the Philippines to the north, the Maluku Sea to the east, Gorontalo and Celebes Sea to the west and the Gulf of Tomini to the southwest. With the outlying island of Miangas to its north, it is the northernmost province of Indonesia. The province's area is 14,500.28 square kilometres (5,598.59 sq mi), and its population was 2,270,596 according to the 2010 census; this rose to 2,621,923 at the 2020 Census, while the official estimate as at mid 2022 was 2,659,543.

The M20 recoilless rifle is a U.S. 75 mm caliber recoilless rifle T21E12 that was used during the last months of the Second World War and extensively during the Korean War. It could be fired from an M1917A1 .30 caliber machine gun tripod, or from a vehicle mount, typically a Jeep. Its shaped charge warhead, also known as HEAT, was capable of penetrating 100 mm of armor. Although the weapon proved ineffective against the T-34 tank during the Korean War and most other tanks, it was used primarily as a close infantry support weapon to engage all types of targets including infantry and lightly armored vehicles. The M20 proved useful against pillboxes and other types of field fortifications.

Bolaang Mongondow Regency is a regency of North Sulawesi Province, Indonesia, situated on the island of Sulawesi. The principal town lies at Kotamobagu, which is now administratively separated from the regency, the administrative centre of which is now at the town of Lolak. The Regency covers an area of 2,871.65 km2, and had a population of 213,484 at the 2010 Census and 248,751 at the 2020 Census.

Copra is the dried, white flesh of the coconut from which coconut oil is extracted. Traditionally, the coconuts are sun-dried, especially for export, before the oil, also known as copra oil, is pressed out. The oil extracted from copra is rich in lauric acid, making it an important commodity in the preparation of lauryl alcohol, soaps, fatty acids, cosmetics, etc. and thus a lucrative product for many coconut-producing countries. The palatable oil cake, known as copra cake, obtained as a residue in the production of copra oil is used in animal feeds. The ground cake is known as coconut or copra meal.

The Indonesian Air Force sometimes shortened as IDAF / IdAF, is the aerial branch of the Indonesian National Armed Forces. The Indonesian Air Force is headquartered in Jakarta, Indonesia and is headed by the Chief of Staff of the Air Force. Its order of battle is split into three Air Operations Commands. Most of its airbases are located on the island of Java. The Indonesian Air Force also has its ground force unit, called Air Force Quick Reaction Force Command (Kopasgat). The corps is also known as the "Orange Berets" due to the distinctive color of their service headgear.

The Celebes Sea, or Sulawesi Sea, of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east by the Sangihe Islands chain, on the south by Sulawesi's Minahasa Peninsula, and on the west by northern Kalimantan in Indonesia. It extends 420 miles (675 km) north-south by 520 mi (840 km) east-west and has a total surface area of 110,000 square miles (280,000 km2), to a maximum depth of 20,300 feet (6,200 m). South of the Cape Mangkalihat, the sea opens southwest through the Makassar Strait into the Java Sea.