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Chungmu-class Destroyer
The ''Chungmu'' class was a class of 3 destroyers in the South Korean Navy, Republic of Korea Navy. They entered service in 1963, with the last one being decommissioned in 1989. History South Korea received three destroyers of the Fletcher-class destroyer, ''Fletcher'' class for the Republic of Korea Navy from the United States in 1963 as part of the Military Assistance Program, American Military Assistance Program. This was the first destroyer class of the Republic of Korea Navy. While the Gwanggaeto the Great-class destroyer, ''Gwanggaeto the Great''-class destroyer were Korea's first domestically built destroyers, ships of the Chungmu class, were the first destroyers to serve in the Republic of Korea Navy. The class consisted of three destroyers used by the United States Navy, US Navy during World War II and slightly modernized in electronics and weaponry at the beginning of the 1950s. They were once magnificent ships, which throughout the 1960s constituted the backbone of ...
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Bath Iron Works
Bath Iron Works (BIW) is a major United States shipyard located on the Kennebec River in Bath, Maine, founded in 1884 as Bath Iron Works, Limited. Since 1995, Bath Iron Works has been a subsidiary of General Dynamics. It is the fifth-largest defense contractor in the world as of 2008. BIW has built private, commercial, and military vessels, most of which have been ordered by the United States Navy. History Bath Iron Works was incorporated in 1884 by General Thomas W. Hyde, a native of Bath who served in the American Civil War. After the war, he bought a shop that made windlasses and other iron hardware for the wooden ships built in Bath's many shipyards. He expanded the business by improving its practices, entering new markets, and acquiring other local businesses. By 1882, Hyde Windlass was eyeing the new and growing business of iron shipbuilding, and it incorporated as Bath Iron Works in 1884. On February 28, 1890, BIW won its first contract for complete vessels: two iron g ...
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Surface-search Radar
A surface search radar, sometimes more accurately known as a sea-surface search radar or naval surveillance radar, is a type of military radar intended primarily to locate objects on the surface of lakes and oceans. Part of almost every modern naval ship, they are also widely used on maritime patrol aircraft and naval helicopters. When mounted on an aircraft, they are sometimes known by the British terminology, Air-to-Surface Vessel radar, or ASV for short. Similar radars are also widely used on civilian ships and even small pleasure craft, in which case they are more commonly known as marine radar. As with conventional surveillance radars, these systems detect objects by listening for the reflections of a radio signal off target objects, especially metal. The range of a surface search radar is greatly increased compared to other roles due to several aspects of the sea surfaces and the objects in it. In low sea states, water makes an excellent reflector for radio signals, which helps ...
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ROKS Seoul (DD-912)
USS ''Halsey Powell'' (DD-686), was a of the United States Navy. Namesake Halsey Powell was born on 3 August 1883 in McAfee, Kentucky. He graduated from the United States Naval Academy in 1904, the same year as his cousin future Admiral William "Bull" Halsey. During the next years he served on the battleships , and and studied at the Naval War College. As commander of the , he received the Navy Distinguished Service Medal for outstanding performance as a destroyer division commander on convoy duty during World War I, and Britain's Distinguished Service Order for his rescue of the survivors of the torpedoed hospital ship HMHS Glenart Castle. During his command of the he became one of the US Navy officers who played a major role in protecting and evacuating Armenians and Greeks from the September 1922 destruction of Smyrna in Turkey. He rose to the rank of captain and served as an aide to the Secretary of the Navy in 1926, then served as Naval Attaché at Peking from 1927 ...
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ROKS Chungmu (DD-911)
USS ''Erben'' (DD-631), a ''Fletcher''-class destroyer, was a ship of the United States Navy named for Rear Admiral Henry Erben (1832–1909). ''Erben'' (DD-631) was launched 21 March 1943 by Bath Iron Works Corp., Bath, Maine; sponsored by Mrs. C. B. G. Gaillard, daughter of Rear Admiral ''Erben''; and commissioned 28 May 1943. Service history United States Navy World War II =1943= Arriving at Pearl Harbor 2 October 1943 from Boston, ''Erben'' joined the 5th Fleet and trained in the Hawaiian Islands, on 1 November. She rescued a downed aviator during exercises with an aircraft carrier. She sailed from Pearl Harbor 8 November, rendezvoused with a carrier task group on 15 November, and screened it during preinvasion air attacks on the Gilbert Islands, several times rescuing aviators whose planes had crashed or run out of fuel. As the invasion waves of Marines were landed on Tarawa on 20 November, ''Erben'' continued to screen the carriers launching supporting strikes, p ...
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Tripod Mast
The tripod mast is a type of mast used on warships from the Edwardian era onwards, replacing the pole mast. Tripod masts are distinctive using two large (usually cylindrical) support columns spread out at angles to brace another (usually vertical) column. History The masts were intended to provide a raised platform for visual observers and for fire control equipment, elevated up above the main hull for visibility and to reduce the risk of shell damage to the gear and crews. These masts used three large cylindrical tubes or columns to form the mast. The tubes provided structural cross-bracing and a stiff structure, but were still structurally efficient and reasonably lightweight. Tripod masts were predated by pole masts. The idea dates at least as far back as the French s, built in the late 1870s, which used a pair of tripod masts. The Royal Navy moved to the tripod mast from pole masts with their last pre-dreadnought ( ''Lord Nelson'' class) and the first dreadnought battleship ...
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20 Mm Oerlikon
The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used today. Blowback-operated models History Origins During World War I, the German industrialist Reinhold Becker developed a 20 mm caliber cannon, known now as the 20 mm Becker using the advanced primer ignition blowback (API blowback) method of operation. This used a 20×70mmRB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a limited scale as an aircraft gun on ''Luftstreitkräfte'' warplanes, and an anti-aircraft gun towards the end of that war. Because the Treaty of Versailles banned further production of such weapons in Germany, the patents and design works were transferred in 1919 to the Swiss firm SEMAG (''Seebac ...
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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 World War II by country, vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies of World War II, Allies and the Axis powers. World War II was a total war that directly involved more than 100 million Military personnel, personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Air warfare of World War II, Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the Atomic bombings of Hiroshima and Nagasaki, only two nuclear weapons ever used in war. World War II was by far the List of wars by death toll, deadliest conflict in hu ...
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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 of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Re ...
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Gwanggaeto The Great-class Destroyer
The ''Gwanggaeto the Great''-class destroyers (Hangul: 광개토대왕급 구축함, Hanja: 廣開土大王級 驅逐艦), often called KDX-I, are destroyers, but are classified by some as frigates, operated by the Republic of Korea Navy. It was the first phase of ROKN's KDX program, in moving the ROK Navy from a coastal defence force to a blue-water navy. Development The KDX-I was designed to replace the old destroyers in the ROKN that were transferred from the US Navy in the 1950s and 1960s. It was thought to be a major turning point for the ROKN in that the launching of the first KDX-I meant that ROKN finally had a capability to project power far from its shores. After the launching of the ship, there was a massive boom in South Korean international participation against piracy and military operations other than war. Description Weapon systems The primary weapon deployed by ''Gwanggaeto the Great''-class vessels is the Super Lynx helicopter, which acts in concert with s ...
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Military Assistance Program
The Mutual Defense Assistance Act was a United States Act of Congress signed by President Harry S. Truman on 6 October 1949. For US Foreign policy, it was the first U.S. military foreign aid legislation of the Cold War era, and initially to Europe. The Act followed Truman's signing of the Economic Cooperation Act (the Marshall Plan), on April 3, 1948, which provided non-military, economic reconstruction and development aid to Europe. The 1949 Act was amended and reauthorized on July 26, 1950. In 1951, the Economic Cooperation Act and Mutual Defense Assistance Act were succeeded by the Mutual Security Act, and its newly created independent agency, the Mutual Security Administration, to supervise all foreign aid programs, including both military assistance programs and non-military, economic assistance programs that bolstered the defense capability of U.S. allies. About the same time, the Mutual Defense Assistance Control Act of 1951, also known or referred to as the Battle ...
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United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five major unincorporated territories, nine United States Minor Outlying Islands, Minor Outlying Islands, and 326 Indian reservations. The United States is also in Compact of Free Association, free association with three Oceania, Pacific Island Sovereign state, sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Palau, Republic of Palau. It is the world's List of countries and dependencies by area, third-largest country by both land and total area. It shares land borders Canada–United States border, with Canada to its north and Mexico–United States border, with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the List of ...
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South Korean Navy
The Republic of Korea Navy (ROKN; ko, 대한민국 해군), also known as the ROK Navy or South Korean Navy, is the naval warfare service branch of the South Korean armed forces, responsible for naval and amphibious operations. The ROK Navy includes the Republic of Korea Marine Corps, which functions as a branch of the Navy. The ROK Navy has about 70,000 regular personnel including 29,000 Republic of Korea Marines. There are about 160 commissioned ships in the ROK Navy. The naval aviation force consists of about 70 fixed-wing and rotary-wing aircraft. The ROK Marine Corps has about 300 tracked vehicles including assault amphibious vehicles. The Republic of Korea Navy was established as the Marine Defense Group on November 11, 1945 after Korea was liberated from the Empire of Japan on August 15, 1945. Since the Korean War, the South Korean navy had concentrated its efforts on building naval forces to counteract hostilities of North Korea. As South Korea's economy grew, the ROK N ...
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