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Action Of 9 February 1945
The German U-boat '' U-864'' was attacked and sunk on 9 February 1945 by , a V-class submarine of the Royal Navy. ''Venturer'' was patrolling the waters around Fedje Island, off the Norwegian coast in the North Sea. The sinking remains the only incident in the history of naval warfare where one submarine sank another while both were submerged. Background HMS ''Venturer'' was a V-class submarine, longer than the earlier U-class with more rake on the stem. The boat was laid down on 25 August 1942 by Vickers Armstrong at Barrow-in-Furness, launched on 4 May 1943 and commissioned on 19 August. The boat had a complement of 37 men, including the captain, Lieutenant Jimmy Launders and had a maximum speed of on the surface. The boat was armed with four 21-inch torpedo tubes with four reloads, a 3-inch gun and three machine-guns. U-864 ''U-864'' was a Type IX U-boat ( Ralf-Reimar Wolfram) on a clandestine mission, Operation Caesar, to the Empire of Japan. On 6 February ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of The Atlantic
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 Allies of World War II, Allied naval Blockade of Germany (1939–1945), blockade of Germany, announced the day after the declaration of war, and Germany's subsequent counter-blockade. The campaign peaked from mid-1940 to the end of 1943. The Battle of the Atlantic pitted U-boats and other warships of the German (navy) and aircraft of the (air force) against the Royal Navy, Royal Canadian Navy, United States Navy, and Merchant Navy (United Kingdom), Allied merchant shipping. Convoys, coming mainly from North America and predominantly going to the United Kingdom and the Soviet Union, were protected for the most part by the British and Canadian navies and air forces. These forces were aided by ships and aircraft of the United States beginning on 13 September 1941. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VII Y IX En Trondheim Color
VII or vii may refer to: Art and entertainment * vii, leading-tone triad, see diminished triad * ''VII'' (Blitzen Trapper album) * ''VII'' (Just-Ice album) * ''VII'' (Teyana Taylor album) * ''VII'' (Tresor album) * '' VII: Journal of the Marion E. Wade Center'' * VII Photo Agency, an international photographic cooperative * Saw VII, the seventh film in the Saw franchise, commonly called "VII" * Star Wars: Episode VII – The Force Awakens, a 2015 film Other uses * VII, The Roman numeral for seven * vii, leading-tone triad, see diminished triad * Vii (river), a river in Romania * Vehicle Infrastructure Integration, an R&D initiative for linking road vehicles to their physical surroundings * Viscosity index improver * * Type VII Submarine, a German submarine class in World War 2 See also * VII Corps (other) 7th Corps, Seventh Corps, or VII Corps may refer to: * VII Corps (Grande Armée), a corps of the Imperial French army during the Napoleonic Wars * VII Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Battles Of World War II Involving Germany
A navy, naval force, military maritime fleet, war navy, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It includes anything conducted by surface ships, amphibious ships, submarines, and seaborne aviation, as well as ancillary support, communications, training, and other fields. The strategic offensive role of a navy is projection of force into areas beyond a country's shores (for example, to protect sea-lanes, deter or confront piracy, ferry troops, or attack other navies, ports, or shore installations). The strategic defensive purpose of a navy is to frustrate seaborne projection-of-force by enemies. The strategic task of a navy also may incorporate nuclear deterrence by use of submarine-launched ballistic missiles. Naval operations can be broadly divided between riverine and littoral applications (brown-water nav ... [...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] |
Torpedo Tube
A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboard surface vessels. Deck-mounted torpedo launchers are usually designed for a specific type of torpedo, while submarine torpedo tubes are general-purpose launchers, and are often also capable of deploying naval mine, mines and cruise missiles. Most modern launchers are standardized on a diameter for light torpedoes (deck mounted aboard ship) or a diameter for heavy torpedoes (underwater tubes), although Torpedo#Classes and diameters, torpedoes of other classes and diameters have been used. Submarine torpedo tube A submarine torpedo tube is a more complex mechanism than a torpedo tube on a surface ship, because the tube has to accomplish the function of moving the torpedo from the normal atmospheric pressure within the submarine into the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rangefinding Telemeter
A rangefinder (also rangefinding telemeter, depending on the context) is a device used to Length measurement, measure distances to remote objects. Originally optical devices used in surveying, they soon found applications in other fields, such as photography, the military, and space travel. They were especially useful for finding the range of a target, such as in naval gunnery and anti-aircraft artillery. The word ''telemeter'' is derived . Designs The first rangefinder telemeter was invented by James Watt in 1769 and put to use in 1771 in surveying canals. Watt called his instrument a micrometer, a term now used with a different meaning in engineering (the micrometer screw gauge). It consisted of two parallel reticle, hairs in the focal plane of a telescope eyepiece crossing an upright hair. At the point to be measured, two sliding targets on a surveyor's rod were adjusted to align with the hairs in the telescope. The distance to the rod could then be determined from th ... [...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] |
Pacific War
The Pacific War, sometimes called the Asia–Pacific War or the Pacific Theatre, was the Theater (warfare), theatre of World War II fought between the Empire of Japan and the Allies of World War II, Allies in East Asia, East and Southeast Asia, the Pacific Ocean, Pacific and Indian Oceans, and Oceania. It was geographically the largest theatre of the war, including the Pacific Ocean theater of World War II, Pacific Ocean theatre, the South West Pacific theater of World War II, South West Pacific theatre, the Second Sino-Japanese War, and the brief Soviet–Japanese War, and included some of the Largest naval battle in history, largest naval battles in history. War between Japan and the Republic of China (1912–1949), Republic of China had begun in 1937, with hostilities dating back to Japanese invasion of Manchuria, Japan's invasion of Manchuria in 1931, but the Pacific War is more widely accepted to have started in 1941, when the United States and United Kingdom entered the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enigma Code
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication. It was employed extensively by Nazi Germany during World War II, in all branches of the German military. The Enigma machine was considered so secure that it was used to encipher the most top-secret messages. The Enigma has an electromechanical rotor mechanism that scrambles the 26 letters of the alphabet. In typical use, one person enters text on the Enigma's keyboard and another person writes down which of the 26 lights above the keyboard illuminated at each key press. If plaintext is entered, the illuminated letters are the ciphertext. Entering ciphertext transforms it back into readable plaintext. The rotor mechanism changes the electrical connections between the keys and the lights with each keypress. The security of the system depends on machine settings that were generally changed daily, based on secret key lists distr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bergen
Bergen (, ) is a city and municipalities of Norway, municipality in Vestland county on the Western Norway, west coast of Norway. Bergen is the list of towns and cities in Norway, second-largest city in Norway after the capital Oslo. By May 2025 the population is 294 029 according to Statistics Norway. The municipality covers and is on the peninsula of Bergenshalvøyen. The city centre and northern neighbourhoods are on Byfjorden (Hordaland), Byfjorden, 'the city fjord'. The city is surrounded by mountains, causing Bergen to be called the "city of Seven Mountains, Bergen, seven mountains". Many of the extra-municipal suburbs are on islands. Bergen is the administrative centre of Vestland county. The city consists of eight boroughs: Arna, Bergen, Arna, Bergenhus, Fana, Bergen, Fana, Fyllingsdalen, Laksevåg, Ytrebygda, Årstad, Bergen, Årstad, and Åsane. Trading in Bergen may have started as early as the 1020s. According to tradition, the city was founded in 1070 by King Ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Pen
A submarine pen (''U-Boot-Bunker'' in German) is a type of submarine base that acts as a bunker to protect submarines from air attack. The term is generally applied to submarine bases constructed during World War II, particularly in Germany and its occupied countries, which were also known as U-boat pens (after the phrase "U-boat" to refer to German submarines). Background Among the first forms of protection for submarines were some open-sided shelters with partial wooden foundations that were constructed during World War I. These structures were built at the time when bombs were light enough to be dropped by hand from the cockpit. By the 1940s, the quality of aerial weapons and the means to deliver them had improved markedly. The mid-1930s saw the Naval Construction Office in Berlin give the problem serious thought. Various factions in the navy were convinced protection for the expanding U-boat arm was required. A Royal Air Force (RAF) raid on the capital in 1940, the occupat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
