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German Submarine U-552
German submarine ''U-552'' was a Type VIIC U-boat built for Nazi Germany's ''Kriegsmarine'' for service during World War II. She was laid down on 1 December 1939 at Blohm & Voss in Hamburg as yard number 528, launched on 14 September 1940, and went into service on 4 December 1940. ''U-552'' was nicknamed the ''Roter Teufel'' ("Red Devil") after her mascot of a grinning devil, which was painted on the conning tower. She was one of the more successful of her class, operating for over three years of continual service and sinking or damaging 35 Allied ships with 164,276 GRT and 1,190 tons sunk and 26,910 GRT damaged. She was a member of 21 wolf packs. ''U-552'' was involved in two controversial actions: On 31 October 1941, she sank the , the first US Navy warship to be lost in World War II; this was at a time when the US was still officially neutral, and caused a diplomatic row. On 3 April 1942, she sank the freighter ''David H. Atwater'' off the US seaboard. ''U-552'' had an unu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erich Topp
Erich Topp (2 July 1914 – 26 December 2005) was a German U-boat commander of World War II. He was a recipient of the Knight's Cross of the Iron Cross with Oak Leaves and Swords of Nazi Germany. He sank 35 ships for a total of . After the war, he served with the Federal German Navy, reaching the rank of ''Konteradmiral'' (rear admiral). He later served in NATO. Early life and career Topp was born in Hannover on 2 July 1914. Topp joined the ''Reichsmarine'' on 8 April 1934.The German ''Reichsmarine'' was renamed to '' Kriegsmarine'' on 1 June 1935. He received his military basic training between 8 April 1934 – 13 June 1934. He was then transferred to the school ship ''Gorch Fock'' on 14 June 1934, and to the light cruiser on 27 September 1934. Under the command of ''Kapitän zur See'' Günther Lütjens, Topp sailed on ''Karlsruhe''s fourth training cruise. ''Karlsruhe'' left Kiel on 22 October 1934. The ship sailed via Skagen, the Azores and Trinidad to North America. '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draught (ship)
The draft or draught of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel). The draught of the vessel is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed. Draft determines the minimum depth of water a ship or boat can safely navigate. The related term air draft is the maximum height of any part of the vessel above the water. The more heavily a vessel is loaded, the deeper it sinks into the water, and the greater its draft. After construction, the shipyard creates a table showing how much water the vessel displaces based on its draft and the density of the water (salt or fresh). The draft can also be used to determine the weight of cargo on board by calculating the total displacement of water, accounting for the content of the ship's bunkers, and using Archimedes' principle. The closely related term "trim" is defined as the difference between the forward and aft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam (nautical)
The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer extremities of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water. Generally speaking, the wider the beam of a ship (or boat), the more initial stability it has, at the expense of secondary stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. A ship that heels on her ''beam ends'' has her deck beams nearly vertical. Typical values Typical length-to-beam ratios ( aspect ratios) for small sailboats are from 2:1 (dinghies to trailerable sailboats around ) to 5:1 (racing sailboats over ). Large ships have widely varying beam ratios, some as large as 20:1. Rowing shells designed for flatwater racing may have length to beam ratios as high as 30:1, while a cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heligoland Bight
The Heligoland Bight, also known as Helgoland Bight, (german: Helgoländer Bucht) is a bay which forms the southern part of the German Bight, itself a bay of the North Sea, located at the mouth of the Elbe river. The Heligoland Bight extends from the mouth of the Elbe to the islands of Heligoland and lies between the East Frisian island of Wangerooge and the North Frisian peninsula of Eiderstedt. Named after Heligoland, it was the location of World War I naval battles in 1914 and 1917. In 1939 it also had a World War II aerial battle named after it. In the Heligoland Basin (''Helgoländer Becken''), a basin lying directly southwest of Heligoland, the bight is up to deep. One of the busiest shipping lanes in the world, from Hamburg and the mouth of the Elbe to the Straits of Dover and the English Channel, runs through the Heligoland Bight. The area also includes nature reserves such as the ''Heligoland Felssockel'' and the protected Wadden Sea, in which the Wadden Sea Nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. A marginal sea of the Atlantic, with limited water exchange between the two water bodies, the Baltic Sea drains through the Danish Straits into the Kattegat by way of the Øresund, Great Belt and Little Belt. It includes the Gulf of Bothnia, the Bay of Bothnia, the Gulf of Finland, the Gulf of Riga and the Bay of Gdańsk. The " Baltic Proper" is bordered on its northern edge, at latitude 60°N, by Åland and the Gulf of Bothnia, on its northeastern edge by the Gulf of Finland, on its eastern edge by the Gulf of Riga, and in the west by the Swedish part of the southern Scandinavian Peninsula. The Baltic Sea is connected by artificial waterways to the White Sea via the White Sea–Baltic Canal and to the German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS David H
SS is an abbreviation for ''Schutzstaffel'', a paramilitary organisation in Nazi Germany. SS, Ss, or similar may also refer to: Places *Guangdong Experimental High School (''Sheng Shi'' or ''Saang Sat''), China *Province of Sassari, Italy (vehicle plate code) *South Sudan (ISO 3166-1 code SS) *SS postcode area, UK, around Southend-on-Sea *San Sebastián, Spanish city Arts, entertainment, and media *SS (band), an early Japanese hardcore punk band * ''SS'' (manga), a Japanese comic 2000-2003 *SS Entertainment, a Korean entertainment company *''S.S.'', for Sosthenes Smith, H. G. Wells pseudonym for story ''A Vision of the Past'' *SS, the production code for the 1968 ''Doctor Who'' serial ''The Wheel in Space'' *''Sesame Street'', American kids' TV show Language * Ss (digraph) used in Pinyin * ß or ss, a German-language ligature * switch-reference in linguistics *''Scilicet'', used as a section sign * (''in the strict sense'') in Latin *Swazi language (ISO 639-1 code "ss") Scienc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US 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 Revolut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfpack (naval Tactic)
The wolfpack was a convoy attack tactic employed in the Second World War. It was used principally by the U-boats of the during the Battle of the Atlantic, and by the submarines of the United States Navy in the Pacific War. The idea of a co-ordinated submarine attack on convoys had been proposed during the First World War but had no success. In the Atlantic during the Second World War the Germans had considerable successes with their wolfpack attacks but were ultimately defeated by the Allies. In the Pacific the American submarine force was able to devastate Japan’s merchant marine, though this was not solely due to the wolfpack tactic. Wolfpacks fell out of use during the Cold War as the role of the submarine changed and as convoys became rare. World War I During the (German war on trade) Allied ships travelled independently prior to the introduction of the convoy system and were vulnerable to attacks by U-boats operating as 'lone wolves'. By gathering up merchant ships into con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceremonial Ship Launching
Ceremonial ship launching involves the performance of ceremonies associated with the process of transferring a vessel to the water. It is a nautical tradition in many cultures, dating back thousands of years, to accompany the physical process with ceremonies which have been observed as public celebration and a solemn blessing, usually but not always, in association with the launch itself. Ship launching imposes stresses on the ship not met during normal operation and, in addition to the size and weight of the vessel, represents a considerable engineering challenge as well as a public spectacle. The process also involves many traditions intended to invite good luck, such as christening by breaking a sacrificial bottle of champagne over the bow as the ship is named aloud and launched. Methods There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching". The oldest, most familiar, and most widely used is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keel Laying
Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one of the four specially celebrated events in the life of a ship; the others are launching, commissioning and decommissioning. In earlier times, the event recognized as the keel laying was the initial placement of the central timber making up the backbone of a vessel, called the keel. As steel ships replaced wooden ones, the central timber gave way to a central steel beam. Modern ships are most commonly built in a series of pre-fabricated, complete hull sections rather than around a single keel. The event recognized as the keel laying is the first joining of modular components, or the lowering of the first module into place in the building dock. It is now often called "keel authentication", and is the ceremonial beginning of the ship's life ... [...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, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
