1.
Nazi Germany
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Nazi Germany is the common English name for the period in German history from 1933 to 1945, when Germany was governed by a dictatorship under the control of Adolf Hitler and the Nazi Party. Under Hitlers rule, Germany was transformed into a fascist state in which the Nazi Party took totalitarian control over all aspects of life. The official name of the state was Deutsches Reich from 1933 to 1943, the period is also known under the names the Third Reich and the National Socialist Period. The Nazi regime came to an end after the Allied Powers defeated Germany in May 1945, Hitler was appointed Chancellor of Germany by the President of the Weimar Republic Paul von Hindenburg on 30 January 1933. The Nazi Party then began to eliminate all opposition and consolidate its power. Hindenburg died on 2 August 1934, and Hitler became dictator of Germany by merging the powers and offices of the Chancellery, a national referendum held 19 August 1934 confirmed Hitler as sole Führer of Germany. All power was centralised in Hitlers person, and his word became above all laws, the government was not a coordinated, co-operating body, but a collection of factions struggling for power and Hitlers favour. In the midst of the Great Depression, the Nazis restored economic stability and ended mass unemployment using heavy military spending, extensive public works were undertaken, including the construction of Autobahnen. The return to economic stability boosted the regimes popularity, racism, especially antisemitism, was a central feature of the regime. The Germanic peoples were considered by the Nazis to be the purest branch of the Aryan race, millions of Jews and other peoples deemed undesirable by the state were murdered in the Holocaust. Opposition to Hitlers rule was ruthlessly suppressed, members of the liberal, socialist, and communist opposition were killed, imprisoned, or exiled. The Christian churches were also oppressed, with many leaders imprisoned, education focused on racial biology, population policy, and fitness for military service. Career and educational opportunities for women were curtailed, recreation and tourism were organised via the Strength Through Joy program, and the 1936 Summer Olympics showcased the Third Reich on the international stage. Propaganda minister Joseph Goebbels made effective use of film, mass rallies, the government controlled artistic expression, promoting specific art forms and banning or discouraging others. Beginning in the late 1930s, Nazi Germany made increasingly aggressive territorial demands and it seized Austria and Czechoslovakia in 1938 and 1939. Hitler made a pact with Joseph Stalin and invaded Poland in September 1939. In alliance with Italy and smaller Axis powers, Germany conquered most of Europe by 1940, reichskommissariats took control of conquered areas, and a German administration was established in what was left of Poland. Jews and others deemed undesirable were imprisoned, murdered in Nazi concentration camps and extermination camps, following the German invasion of the Soviet Union in 1941, the tide gradually turned against the Nazis, who suffered major military defeats in 1943
2.
Deutsche Schiff- und Maschinenbau
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Deutsche Schiff- und Maschinenbau Aktiengesellschaft was a cooperation of eight German shipyards in the period 1926 to 1945. The leading company was the shipyard AG Weser in Bremen, the Deschimag was founded in 1926 when influential Bremen merchants and bankers decided to found a cooperation of great German shipbuilding companies under the leadership of the shipyard AG Weser. These were, Actien-Gesellschaft Weser, Bremen Vulkan-Werke Hamburg A. G. Hamburg Joh, tecklenborg A. G. Wesermünde AG Vulcan Stettin, Stettin G. Seebeck A. G. Geestemünde Actien-Gesellschaft Neptun, Rostock Nüscke & Co. But in the years most of these companies were closed. At least only AG Weser and Seebeckwerft survived this process of concentration and reduction of shipbuilding capacities, in 1941 Krupp, then the most important German engineering and armaments conglomerate, acquired a majority shareholding in both shipyards. Because of diversification and to new jobs Deschimag also diversified into aircraft construction. In 1933 the Weser Flugzeugbau GmbH – abbreviated Weserflug – was founded and it started making aircraft components and later complete aircraft at different places in Germany, one of them was the former shipyard Frerichswerft AG. In 1936 the Weserflug separated from the Deschimag and became an independent company and it became the fourth largest aircraft manufacturer in Germany in World War II, but only as a licensee of other German aircraft companies, mainly Dornier and Junkers. Deschimag was dissolved after war but AG Weser and Seebeck AG shipyards again survived and continued in shipbuilding, later in 1988 it merged with Schichau Shipyard to SSW Schichau Seebeck Shipyard GmbH, which closed in 2009. SS Lichtenfels 1929, heavy lift ship, for DDG Hansa, used to transport locomotives to India. AG Weser 1929, ocean liner Bremen for Norddeutscher Lloyd, won Blue Riband 1929 and 1933 for fastest Atlantic Ocean crossing. Bremen escaped after beginning of war from New York to Bremerhaven, burnt out 1940 in Bremerhaven, AG Weser 1935, turbo-electric ocean liner Scharnhorst for Norddeutscher Lloyd. Rebuilt to Japanese auxiliary aircraft carrier Shinyo in 1942, sunk 1944 by US submarine USS Spadefish, AG Weser 1935, geared-turbine ocean liner Gneisenau for Norddeutscher Lloyd. Sunk by a mine in the Baltic in May 1943, raised and scrapped in 1950, AG Weser 1936, whale factory ship Terje Viken for United Whalers Ltd. Largest factory ship in the World, March 1941 sunk by U-boats U-47, AG Weser,1937, whale factory ship Unitas for German company Jürgens-Van den Bergh. Became Japanese Nisshin Maru II, scrapped in Taiwan 1987, AG Weser,1937, merchant ship Kandelfels for DDG Hansa. In WW II converted to German auxiliary cruiser Pinguin,1941 sunk by British cruiser HMS Cornwall, AG Weser,1938, merchant ship Ems for Norddeutscher Lloyd. In WW II converted to German auxiliary cruiser Komet,1942 sunk by planes and ships of Royal Air Force, MS Oslofjord for Den norske Amerikalinje MV Mars, cargo liner for Neptun Line
3.
Bremen
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The City Municipality of Bremen is a Hanseatic city in northwestern Germany, which belongs to the state Free Hanseatic City of Bremen. As a commercial and industrial city with a port on the River Weser, Bremen is part of the Bremen/Oldenburg Metropolitan Region. Bremen is the second most populous city in Northern Germany and eleventh in Germany, Bremen is a major cultural and economic hub in the northern regions of Germany. Bremen is home to dozens of galleries and museums, ranging from historical sculptures to major art museums. Bremen has a reputation as a working class city, along with this, Bremen is home to a large number of multinational companies and manufacturing centers. Companies headquartered in Bremen include the Hachez chocolate company and Vector Foiltec, four-time German football champions Werder Bremen are also based in the city. Bremen is some 60 km south from the Weser mouth on the North Sea, with Bremerhaven right on the mouth the two comprise the state of the Free Hanseatic City of Bremen. The marshes and moraines near Bremen have been settled since about 12,000 BC, burial places and settlements in Bremen-Mahndorf and Bremen-Osterholz date back to the 7th century AD. Since The Renaissance, some scientists have believed that the entry Fabiranum or Phabiranon in Ptolemys Fourth Map of Europe, written in 150 AD, but Ptolemy gives geographic coordinates, and by these dates Phabiranon is situated northeast of the mouth of river Visurgis. At that time the Chauci lived in the now called north-western Germany or Lower Saxony. By the end of the 3rd century, they had merged with the Saxons, during the Saxon Wars the Saxons, led by Widukind, fought against the West Germanic Franks, the founders of the Carolingian Empire, and lost the war. Charlemagne, the King of the Franks, made a new law, the Lex Saxonum which stated that Saxons were not allowed to worship Odin, in 787 Willehad of Bremen became the first Bishop of Bremen. The citys first stone walls were built in 1032, around this time trade with Norway, England and the northern Netherlands began to grow, thus increasing the importance of the city. The city was recognised as an entity with its own laws. Property was to be inherited without feudal claims for reversion to its original owner. This privilege laid the foundation for Bremens later status of imperial immediacy, since the city was the major taxpayer, its consent was generally sought. In this way the city wielded fiscal and political power within the Prince-Archbishopric, in 1260 Bremen joined the Hanseatic League. In 1350, the number of inhabitants reached 20,000, around this time the Hansekogge became a unique product of Bremen
4.
German Type IX submarine
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The Type IX U-boat was designed by Nazi Germanys Kriegsmarine in 1935 and 1936 as a large ocean-going submarine for sustained operations far from the home support facilities. Type IX boats were used for patrols off the eastern United States in an attempt to disrupt the stream of troops. It was derived from the Type IA, and appeared in various sub-types, Type IXs had six torpedo tubes, four at the bow and two at the stern. They carried six reloads internally and had five external torpedo containers which stored ten additional torpedoes, the total of 22 torpedoes allowed U-boat commanders to follow a convoy and strike night after night. Some of the IXC boats were fitted for operations, as mine-layers they could carry 44 TMA or 66 TMB mines. Secondary armament was provided by one 10.5 cm deck gun with 180 rounds, anti-aircraft armament differed throughout the war. They had two periscopes in the tower, types IXA and IXB had an additional periscope in the control room, which was removed in Type IXC and afterward. DeSchiMAG AG Weser of Bremen built eight Type IXA U-boats, Type IXB was an improved model with an increased range. It was the most successful version overall with each boat averaging a total of over 100,000 GRT sunk, DeSchiMAG AG Weser of Bremen built 14 Type IXB U-boats. Type IXC was a refinement of the class with storage for an additional 43 tonnes of fuel. This series omitted the control room periscope leaving the boats with two tower scopes, as mine-layers they could carry 44 TMA or 66 TMB mines, though U-162 through U-170 and U-505 through U-550, were not fitted for mine operations. The only U-boat sunk in the Gulf of Mexico, U-166, was a Type IXC, U-505 survives at the Museum of Science and Industry in Chicago, and as of 2005 has been completely renovated. DeSchiMAG AG Weser and Seebeckwerft of Bremen, and Deutsche Werft of Hamburg built 54 Type IXC submarines, Type IXC/40 was an improved Type IXC with slightly increased range and surfaced speed. The remains of U-534 are on display at Woodside Ferry Terminal, DeSchiMAG AG Weser and Seebeckwerft of Bremen, and Deutsche Werft of Hamburg, built 87 of this type. Type IXD was significantly longer and heavier than the IXC/40 and it was faster than the IXC but at the cost of slightly reduced range. They had three pairs of Daimler Benz diesels, two pairs for cruise and one for speed or battery recharge. There were three variants, the IXD1, IXD2 and IXD/42, the IXD1 had unreliable engines and they were later converted for use in surface transport vessels. The IXD2 comprised most of the class and had a range of 12,750 nautical miles, the IXD/42, was almost identical but with more engine power
5.
Submarine
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A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability, the term most commonly refers to a large, crewed vessel. It is also used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine. The noun submarine evolved as a form of submarine boat, by naval tradition, submarines are usually referred to as boats rather than as ships. Although experimental submarines had been built before, submarine design took off during the 19th century, Submarines were first widely used during World War I, and now figure in many navies large and small. Civilian uses for submarines include marine science, salvage, exploration and facility inspection, Submarines can also be modified to perform more specialized functions such as search-and-rescue missions or undersea cable repair. Submarines are also used in tourism, and for undersea archaeology, most large submarines consist of a cylindrical body with hemispherical ends and a vertical structure, usually located amidships, which houses communications and sensing devices as well as periscopes. In modern submarines, this structure is the sail in American usage, a conning tower was a feature of earlier designs, a separate pressure hull above the main body of the boat that allowed the use of shorter periscopes. There is a propeller at the rear, and various hydrodynamic control fins, smaller, deep-diving and specialty submarines may deviate significantly from this traditional layout. Submarines use diving planes and also change the amount of water, Submarines have one of the widest ranges of types and capabilities of any vessel. Submarines can work at greater depths than are survivable or practical for human divers, modern deep-diving submarines derive from the bathyscaphe, which in turn evolved from the diving bell. In 1578, the English mathematician William Bourne recorded in his book Inventions or Devises one of the first plans for an underwater navigation vehicle and its unclear whether he ever carried out his idea. The first submersible of whose construction there exists reliable information was designed and built in 1620 by Cornelis Drebbel and it was propelled by means of oars. By the mid-18th century, over a dozen patents for submarines/submersible boats had been granted in England, in 1747, Nathaniel Symons patented and built the first known working example of the use of a ballast tank for submersion. His design used leather bags that could fill with water to submerge the craft, a mechanism was used to twist the water out of the bags and cause the boat to resurface. In 1749, the Gentlemens Magazine reported that a design had initially been proposed by Giovanni Borelli in 1680. By this point of development, further improvement in design stagnated for over a century, until new industrial technologies for propulsion. The first military submarine was the Turtle, a hand-powered acorn-shaped device designed by the American David Bushnell to accommodate a single person and it was the first verified submarine capable of independent underwater operation and movement, and the first to use screws for propulsion
6.
Length overall
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Length overall, often abbreviated as is the maximum length of a vessels hull measured parallel to the waterline. This length is important while docking the ship and it is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth. LOA is usually measured on the hull alone, for sailing ships, this may exclude the bowsprit and other fittings added to the hull. This is how some racing boats and tall ships use the term LOA, however, other sources may include bowsprits in LOA. Sparred length, Total length including bowsprit, Mooring length and LOA including bowsprit are other expressions that might indicate the length of a sailing ship. Often used to distinguish between the length of a vessel including projections from the length of the hull itself, the Length on Deck or LOD is often reported and this is especially useful for smaller sailing vessels, as their LOA can be significantly different from their LOD. In ISO8666 for small boats, there is a definition of LOH and this may be shorter than a vessels LOA, because it excludes other parts attached to the hull, such as bowsprits. Another measure of length is LWL which is useful in assessing a vessels performance. In some cases LWL can be shorter than LOA. Overall length in cartridges The National Register of Historic Vessels Length between perpendiculars Hayler, William B, keever, John M. American Merchant Seamans Manual. Turpin, Edward A. McEwen, William A
7.
Submarine hull
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A light hull of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape. The pressure hull is the hull of a submarine, this holds the difference between outside and inside pressure. This design, already visible on very early submarines is called a teardrop hull and it significantly reduces the hydrodynamic drag on the sub when submerged, but decreases the sea-keeping capabilities and increases the drag while surfaced. Because of the slow submerged speeds of these submarines, usually well below 10 knots, USS Albacore was a unique research submarine that pioneered the American version of the teardrop hull form of modern submarines. All small modern submarines and submersibles, as well as the oldest ones, have a single hull, however, for large submarines, the approaches have separated. All Soviet heavy submarines are built with a hull structure. The double hull of a submarine is different from a double hull. The external hull, which forms the shape of submarine, is called the outer hull. This term is appropriate for Russian submarine construction, where the light hull is usually made of steel that is only 2 to 4 millimetres thick. The light hull can be used to mount equipment, which if attached directly to the hull could cause unnecessary stress. The double hull approach also saves space inside the hull, as the ring stiffeners. These measures help minimise the size of the hull, which is much heavier than the light hull. Also, in case the submarine is damaged, the light hull takes some of the damage and does not compromise the vessels integrity, inside the outer hull there is a strong hull, or pressure hull, which actually withstands the outside pressure and has normal atmospheric pressure inside. The pressure hull is constructed of thick high-strength steel with a complex structure and high strength reserve. The pressure and light hulls arent separated, and form a structure with increased strength. The interhull space is used for some of the equipment which doesnt require constant pressure to operate, the list significantly differs between submarines, and generally includes different water/air tanks. In case of a submarine, the light hull and the pressure hull are the same except for the bow. The constructions of a pressure hull requires a degree of precision
8.
Diesel engine
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Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a degree that it ignites atomised diesel fuel that is injected into the combustion chamber. This contrasts with spark-ignition engines such as an engine or gas engine. In diesel engines, glow plugs may be used to aid starting in cold weather, or when the engine uses a lower compression-ratio, the original diesel engine operates on the constant pressure cycle of gradual combustion and produces no audible knock. Low-speed diesel engines can have an efficiency that exceeds 50%. Diesel engines may be designed as either two-stroke or four-stroke cycles and they were originally used as a more efficient replacement for stationary steam engines. Since the 1910s they have used in submarines and ships. Use in locomotives, trucks, heavy equipment and electricity generation plants followed later, in the 1930s, they slowly began to be used in a few automobiles. Since the 1970s, the use of engines in larger on-road and off-road vehicles in the US increased. According to the British Society of Motor Manufacturing and Traders, the EU average for diesel cars accounts for 50% of the total sold, including 70% in France and 38% in the UK. The worlds largest diesel engine is currently a Wärtsilä-Sulzer RTA96-C Common Rail marine diesel, the definition of a Diesel engine to many has become an engine that uses compression ignition. To some it may be an engine that uses heavy fuel oil, to others an engine that does not use spark ignition. However the original cycle proposed by Rudolf Diesel in 1892 was a constant temperature cycle which would require higher compression than what is needed for compression ignition. Diesels idea was to compress the air so tightly that the temperature of the air would exceed that of combustion, to make this more clear, let it be assumed that the subsequent combustion shall take place at a temperature of 700°. Then in that case the pressure must be sixty-four atmospheres, or for 800° centigrade the pressure must be ninety atmospheres. In later years Diesel realized his original cycle would not work, Diesel describes the cycle in his 1895 patent application. Notice that there is no longer a mention of compression temperatures exceeding the temperature of combustion, now all that is mentioned is the compression must be high enough for ignition. In 1806 Claude and Nicéphore Niépce developed the first known internal combustion engine, the Pyréolophore fuel system used a blast of air provided by a bellows to atomize Lycopodium
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