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German Type XVII Submarine
The Type XVII U-boats were small coastal submarines that used a high-test peroxide propulsion system, which offered a combination of air-independent propulsion and high submerged speeds. Background In the early 1930s Hellmuth Walter had designed a small, high-speed submarine with a streamlined form propelled by high-test peroxide (HTP) and in 1939 he was awarded a contract to build an experimental vessel, the 80 ton , which achieved an underwater speed of during trials in 1940. In November 1940 Admirals Erich Raeder and Werner Fuchs (head of the '' Kriegsmarine''s Construction Office) witnessed a demonstration of the ''V-80''; Raeder was impressed, but Fuchs was slow to approve further tests. Following the success of the ''V-80's'' trials, Walter contacted Karl Dönitz in January 1942, who enthusiastically embraced the idea and requested that these submarines be developed as quickly as possible. An initial order was placed in summer 1942 for four Type XVIIA development subma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blohm + Voss
Blohm is a surname. Notable people with the surname include: * Hans Blohm C.M. (born 1927), photographer and author * Hermann Blohm (1848–1930), German businessman and co-founder of German company Blohm+Voss * Linn Blohm (born 1992), Swedish handball player for IK Sävehof and the Swedish national team * Robert Blohm (born 1948), American and Canadian investment banker, economist and statistician, professor in China's Central University of Finance and Economics * Tom Blohm (1920–2000), Norwegian football player See also *Blohm + Voss, a German shipbuilding and engineering works *Blom *Bohm (other) Bohm may refer to: * Bohm (surname) * Bohm Dialogue, free-flowing group conversation Physics * Aharonov–Bohm effect of electromagnetic potential on a particle * Bohm sheath criterion for a Debye sheath plasma layer * Bohm diffusion of plasma i ... {{surname de:Blohm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Submarine
A coastal submarine or littoral submarine is a small, maneuverable submarine with shallow draft well suited to navigation of coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than midget submarines, but smaller than sea-going submarines designed for longer patrols on the open ocean. Space limitations aboard coastal submarines restrict fuel availability for distant travel, food availability for extended patrol duration, and number of weapons carried. Within those limitations, however, coastal submarines may be able to reach areas inaccessible to larger submarines, and be more difficult to detect. History The earliest submarines were effectively coastal submarines, but as modern submarine tactics developed during World War I, the advantages of rapid construction and portability encouraged development of UB torpedo launching, and UC minelaying coastal submarines in 1915 to operate in the English Channel. These coastal submarines dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allied-occupied Germany
Germany was already de facto occupied by the Allies from the real fall of Nazi Germany in World War II on 8 May 1945 to the establishment of the East Germany on 7 October 1949. The Allies (United States, United Kingdom, Soviet Union, and France) asserted joint authority and sovereignty at the 1945 Berlin Declaration. At first, defining Allied-occupied Germany as all territories of the former German Reich before Nazi annexing Austria; however later in the 1945 Potsdam Conference of Allies, the Potsdam Agreement decided the new German border as it stands today. Said border gave Poland and the Soviet Union all regions of Germany (eastern parts of Pomerania, Neumark, Posen-West Prussia, Free City of Danzig, East-Prussia & Silesia) east of the Oder–Neisse line and divided the remaining "Germany as a whole" into the four occupation zones for administrative purposes under the three Western Allies (the United States, the United Kingdom, and France) and the Soviet Union. Althou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuxhaven
Cuxhaven (; ) is an independent town and seat of the Cuxhaven district, in Lower Saxony, Germany. The town includes the northernmost point of Lower Saxony. It is situated on the shore of the North Sea at the mouth of the Elbe River. Cuxhaven has a footprint of (east–west) by (north–south). Its town quarters Duhnen, Döse and Sahlenburg are especially popular vacation spots on the North Sea and home to about 52,000 residents. Cuxhaven is home to an important fisherman's wharf and ship registration point for Hamburg as well as the Kiel Canal until 2008. Tourism is also of great importance. The city and its precursor Ritzebüttel belonged to Hamburg from the 13th century until 1937. The island of Neuwerk, a Hamburg dependency, is located just northwest of Cuxhaven in the North Sea. The city's symbol, known as the Kugelbake, is a beacon once used as a lighthouse; the wooden landmark on the mouth of the Elbe marks the boundary between the river and the North Sea and also ador ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million 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. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, massa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type XVIIB Submarine SC 210745
Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * Type (Unix), a command in POSIX shells that gives information about commands. * Type safety, the extent to which a programming language discourages or prevents type errors. * Type system, defines a programming language's response to data types. Mathematics * Type (model theory) * Type theory, basis for the study of type systems * Arity or type, the number of operands a function takes * Type, any proposition or set in the intuitionistic type theory * Type, of an entire function ** Exponential type Biology * Type (biology), which fixes a scientific name to a taxon * Dog type, categorization by use or function of domestic dogs Lettering * Type is a design concept for lettering used in typography which helped bring about modern textual print ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type XXI Submarine
Type XXI submarines were a class of German diesel–electric '' Elektroboot'' (German: "electric boat") submarines designed during the Second World War. One hundred and eighteen were completed, with four being combat-ready. During the war only two were put into active service and went on patrols, but these were not used in combat. They were the first submarines designed to operate primarily submerged, rather than spending most of their time as surface ships that could submerge for brief periods as a means of escaping detection. They incorporated many batteries to increase the time they could spend submerged, to as much as several days, and they only needed to surface to periscope depth for recharging via a snorkel. The design included many general improvements as well: much greater underwater speed by an improved hull design, greatly improved diving times, power-assisted torpedo reloading and greatly improved crew accommodations. However, the design was also flawed in many ways, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Meteorite
HMS ''Meteorite'' was an experimental U-boat developed in Germany, scuttled at the end of World War II, subsequently raised and commissioned into the Royal Navy. The submarine was originally commissioned into the '' Kriegsmarine'' on 13 March 1945 as ''U-1407''. She was built around a Walter engine fueled by high-test peroxide (HTP). History The three completed German Type XVIIB submarines were scuttled by their crews at the end of the Second World War, at Flensburg and and ''U-1407'' at Cuxhaven, all in the British Zone of Occupation. ''U-1406'' and ''U-1407'' were scuttled on 7 May 1945 by ''Oberleutnant zur See'' Gerhard Grumpelt even though a superior officer, ''Kapitän zur See'' Kurt Thoma, had prohibited such actions. Grumpelt was subsequently sentenced to seven years' imprisonment by a British military court. At the Potsdam Conference in July 1945 ''U-1406'' was allocated to the United States and ''U-1407'' to the United Kingdom, and both were soon salvaged. Roya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Closed System
A closed system is a natural physical system that does not allow transfer of matter in or out of the system, although — in contexts such as physics, chemistry or engineering — the transfer of energy (''e.g.'' as work or heat) is allowed. In physics In classical mechanics In nonrelativistic classical mechanics, a closed system is a physical system that doesn't exchange any matter with its surroundings, and isn't subject to any net force whose source is external to the system. A closed system in classical mechanics would be equivalent to an isolated system in thermodynamics. Closed systems are often used to limit the factors that can affect the results of a specific problem or experiment. In thermodynamics In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings. An isolated system cannot exchange any heat, work, or matter with the surroundings, while an open system can exchange energy and matter. (This scheme of defin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Dönitz
Karl Dönitz (sometimes spelled Doenitz; ; 16 September 1891 24 December 1980) was a German admiral who briefly succeeded Adolf Hitler as head of state in May 1945, holding the position until the dissolution of the Flensburg Government following Germany's unconditional surrender to the Allies days later. As Supreme Commander of the Navy beginning in 1943, he played a major role in the naval history of World War II. He began his career in the Imperial German Navy before World War I. In 1918, he was commanding , and was taken prisoner of war by British forces. While in a POW camp, he formulated what he later called ''Rudeltaktik'' ("pack tactic", commonly called "wolfpack"). By the start of the Second World War, Dönitz was supreme commander of the '' Kriegsmarine'' U-boat arm ( (BdU)). In January 1943, Dönitz achieved the rank of (grand admiral) and replaced Grand Admiral Erich Raeder as Commander-in-Chief of the Navy. Dönitz was the main enemy of Allied naval for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kriegsmarine
The (, ) was the navy of Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic. The was one of three official branches, along with the and the , of the , the German armed forces from 1935 to 1945. In violation of the Treaty of Versailles, the grew rapidly during German naval rearmament in the 1930s. The 1919 treaty had limited the size of the German navy and prohibited the building of submarines. ships were deployed to the waters around Spain during the Spanish Civil War (1936–1939) under the guise of enforcing non-intervention, but in reality supported the Nationalists against the Spanish Republicans. In January 1939, Plan Z, a massive shipbuilding program, was ordered, calling for surface naval parity with the British Royal Navy by 1944. When World War II broke out in September 1939, Plan Z was shelved in favour of a crash building program for submarines ( U-b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erich Raeder
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a German admiral who played a major role in the naval history of World War II. Raeder attained the highest possible naval rank, that of grand admiral, in 1939, becoming the first person to hold that rank since Henning von Holtzendorff in 1918. Raeder led the '' Kriegsmarine'' for the first half of the war; he resigned in January 1943 and was replaced by Karl Dönitz. At the Nuremberg Trials he was sentenced to life imprisonment but was released early owing to failing health. Early career Early years Raeder was born in Wandsbek in the Prussian province of Schleswig-Holstein in the German Empire. His father was a headmaster, who as a teacher and a father was noted for his marked authoritarian views, and who impressed upon his son the values of hard work, thrift, faith and obedience – all values that Raeder preached throughout his life.Bird ''Erich Raeder'' pp. 1–2. Hans Raeder also warned his children ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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