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HMS Venturer (P68)
HMS ''Venturer'' was a Second World War British submarine of the V class that sank two German U-boats and five merchant ships during the war. Following the war, the boat was sold to Norway and was renamed HNoMS ''Utstein''. She was scrapped in 1964. She is the only submarine in history to have sunk another while both were submerged. Construction ''Venturer'' was the lead boat of the British V-class submarine, a development of the successful U class. She was built at the Vickers Armstrong yard in Barrow-in-Furness. Construction commenced in August 1942 and she was launched eight months later in May 1943. ''Venturer'' was commissioned on 19 August 1943. Service history On completing trials and working-up, ''Venturer'' commenced operations patrolling the Norwegian coast for coastal traffic and U-boats leaving or entering base. She was successful on several occasions, sinking three Axis vessels during 1944. She also sank the on 11 November 1944 east of Andenes, Norway, off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Venturer (P68) (IWM FL 004031)
Seven ships of the Royal Navy have been named HMS ''Venturer'', with an eighth announced: * HMS ''Venturer'' was a 14-gun cutter purchased in 1787 and named . She was captured by the French in 1794, recaptured in 1797, then briefly retaken but finally recaptured. She was recommissioned as HMS ''Venturer'' and was sold in 1803. * was a 10-gun schooner, previously the French privateer ''Nouvelle Enterprise''. captured her in 1807. She was renamed HMS ''Theodocia'' in 1808 and sold in 1814. She then became the mercantile ''Theodosia''. She traded with Rid de Janeiro and was last listed in 1822. * was a V-class submarine launched in 1943 and sold to the Norwegian Navy in 1946. She was renamed HNoMS ''Utstein'' and was scrapped in 1964. * HMS ''Venturer'' has been a name allocated to three tenders of , the Bristol Royal Naval Volunteer Reserve Division: ** Motor minesweeper ''261'' was HMS ''Venturer'' between 1948 and 1956 ** was HMS ''Venturer'' in 1962 ** was HMS ''Venturer' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HM Submarine Venturer, Latest Submarine To Be Commissioned
HM or hm may refer to: Arts and entertainment * ''HM'' (magazine), a Christian hard rock magazine Businesses, groups, organizations * H&M, a Swedish clothing company * Hindustan Motors, an automobile manufacturer of India * Air Seychelles (IATA airline code HM) * HM Transport, a bus company in the Philippines People * Henry Molaison, aka Patient H.M., a man with anterograde amnesia * His or Her Majesty, a form of address for various monarchs * Home Minister, an interior minister * Hospital corpsman, in the United States Navy * Sisters of the Holy Humility of Mary's postnominal initials Other uses * Heard Island and McDonald Islands (ISO 3166 digram and FIPS PUB 10-4 territory code HM) ** .hm, the Internet country code top-level domain ostensibly for the above * Hectometre (hm), an SI unit of length * Hindley–Milner type system A Hindley–Milner (HM) type system is a classical type system for the lambda calculus with parametric polymorphism. It is also known as Damas–Mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Displacement (ship)
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used. Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below. Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage. Calculation The process of determining a vessel's displacement begins with measuring its draft.George, 2005. p. 5. This is accomplished by means of its "draft marks". A merchant vessel has t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distinguished Service Order
The Distinguished Service Order (DSO) is a Military awards and decorations, military award of the United Kingdom, as well as formerly throughout the Commonwealth of Nations, Commonwealth, awarded for operational gallantry for highly successful command and leadership during active operations, typically in actual combat. Equal in Awards and decorations of the British Armed Forces, British precedence of military decorations to the Conspicuous Gallantry Cross and Royal Red Cross, since 1993 the DSO is eligible to all Military rank, ranks awarded specifically for "highly successful command and leadership during active operations". History Instituted on 6 September 1886 by Queen Victoria by Warrant (law), Royal Warrant published in ''The London Gazette'' on 9 November, the first DSOs awarded were dated 25 November 1886. The Order (distinction), order was established to recognise individual instances of meritorious or distinguished service in war. It is a military order, and wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASDIC
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. "Sonar" can refer to one of two types of technology: ''passive'' sonar means listening for the sound made by vessels; ''active'' sonar means emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, and sodar (an upward-looking in-air sonar) is used for atmospheric investigations. The term ''sonar'' is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low ( infrasonic) to e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Caesar
Operation Caesar () was a secret mission carried out by Germany in the Second World War to supply Japan with advanced technology. The operation failed due to the sinking of U-864 by a British submarine, the only known example of a submerged submarine sinking another submerged submarine. The operation On 5 December 1944, ''U-864'', on her maiden voyage, was dispatched on a secret mission to deliver supplies to Japan. ''U-864''s primary cargo was advanced Messerschmitt jet engine parts for use in Japanese aircraft and V-2 missile guidance systems. Her secondary cargo comprised of the strategic material mercury in 1,857 canisters for use in weapons production. She left Kiel and headed north. While going through the Kiel Canal, ''U-864'' grounded and damaged her hull. Her captain, Ralf-Reimar Wolfram, decided to sail to the U-boat pens at Bergen, Norway. On 12 January 1945, while ''U-864'' was still undergoing repairs, British bombers attacked the pens, delaying the repai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Messerschmitt Me 262
The Messerschmitt Me 262, nicknamed (German for "Swallow") in fighter versions, or ("Storm Bird") in fighter-bomber versions, is a fighter aircraft and fighter-bomber that was designed and produced by the German aircraft manufacturer Messerschmitt. It was the world's first operational jet-powered fighter aircraft and one of two jet fighter aircraft types to see air-to-air combat in World War Two, the other being the Heinkel He 162. The design of what would become the Me 262 started in April 1939, before World War II. It made its maiden flight on 18 April 1941 with a piston engine, and its first jet-powered flight on 18 July 1942. Progress was delayed by problems with engines, metallurgy Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the ..., and interference from Luftwaffe chie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Engine
A jet engine is a type of reaction engine, discharging a fast-moving jet (fluid), jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition may include Rocket engine, rocket, Pump-jet, water jet, and hybrid propulsion, the term typically refers to an internal combustion airbreathing jet engine, air-breathing jet engine such as a turbojet, turbofan, ramjet, pulse jet engine, pulse jet, or scramjet. In general, jet engines are internal combustion engines. Air-breathing jet engines typically feature a Axial compressor, rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle—this process is known as the Brayton cycle, Brayton thermodynamic cycle. Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use more complex High-bypass turbofan, high-bypas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junkers Jumo 004
The Junkers Jumo 004 was the world's first production turbojet engine in operational use, and the first successful axial compressor turbojet engine. Some 8,000 units were manufactured by Junkers in Germany late in World War II, powering the Messerschmitt Me 262 fighter and the Arado Ar 234 reconnaissance/bomber, along with prototypes, including the Horten Ho 229. Variants and copies of the engine were produced in Eastern Europe and the USSR for several years following the end of WWII. Design and development The feasibility of jet propulsion had been demonstrated in Germany in early 1937 by Hans von Ohain working with the Heinkel company. Most of the Reich Air Ministry ( RLM) remained uninterested, but Helmut Schelp and Hans Mauch saw the potential of the concept and encouraged Germany's aero engine manufacturers to begin their own programmes of jet engine development. The companies remained skeptical and little new development was carried out. In 1939 Schelp and Mauch visit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (element)
Mercury is a chemical element; it has Symbol (chemistry), symbol Hg and atomic number 80. It is commonly known as quicksilver. A Heavy metal element, heavy, silvery d-block element, mercury is the only metallic element that is known to be liquid at standard temperature and pressure; the only other element that is liquid under these conditions is the halogen bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature. Mercury occurs in deposits throughout the world mostly as cinnabar (mercuric sulfide). The red pigment vermilion is obtained by Mill (grinding), grinding natural cinnabar or synthetic mercuric sulfide. Exposure to mercury and mercury-containing organic compounds is toxic to the nervous system, immune system and kidneys of humans and other animals; mercury poisoning can result from exposure to water-soluble forms of mercury (such as mercuric chloride or methylmercury) either directly or through mechanisms of biomagnification. Mercu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultra (cryptography)
Ultra was the designation adopted by United Kingdom, British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. ''Ultra'' eventually became the standard designation among the western Allies of World War II, Allies for all such intelligence. The name arose because the intelligence obtained was considered more important than that designated by the highest British Classified information, security classification then used (''Most Secret'' and so was regarded as being ''Ultra Secret''. Several other cryptonyms had been used for such intelligence. The code name "Boniface" was used as a cover name for ''Ultra''. In order to ensure that the successful code-breaking did not become apparent to the Germans, British intelligence created a fictional MI6 master spy, Boniface, who controlled a fictional series of agents throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
