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U-2506
German submarine ''U-2506'' was a Type XXI U-boat (one of the "'' Elektroboote''") of Nazi Germany's ''Kriegsmarine'', built for service in World War II. The submarine was laid down on 29 May 1944 at the Blohm & Voss yard at Hamburg, launched on 5 August 1944, and commissioned on 31 August 1944 under the command of '' Kapitänleutnant'' Horst von Schroeter, who commanded her until 9 May 1945. ''U-2506'' conducted no patrols, and surrendered on 9 May 1945 in Bergen, Norway. She was then transferred to Lerwick on 18 June 1945, then Lisahally on 21 June 1945. She was sunk on 5 January 1946 at . Design Like all Type XXI U-boats, ''U-2506'' had a displacement of when at the surface and while submerged. She had a total length of ( o/a), a beam of , and a draught of . The submarine was powered by two MAN SE supercharged six-cylinder M6V40/46KBB diesel engines each providing , two Siemens-Schuckert GU365/30 double-acting electric motors each providing , and two Siemens-Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
31st U-boat Flotilla
''31st U-boat Flotilla'' ("31. Unterseebootsflottille") was a training flotilla ("''Ausbildungsflottille''") of Nazi Germany's ''Kriegsmarine'' during World War II. The flotilla was formed in Hamburg in September 1943 under the command of ''Kapitän zur See'' Bruno Mahn. Later based at Wilhelmshaven, and then Wesermünde, it was commanded by Carl Emmermann for the final month of the war. It was disbanded in May 1945 when Germany surrendered. Flotilla commanders *''Kapitän zur See'' Bruno Mahn (September 1943–April 1945) *''Korvettenkapitän'' Carl Emmermann Carl Emmermann (6 March 1915 – 25 March 1990) was a German U-boat commander during World War II. In his time as commander, submarines under his command sank 27 ships for a total tonnage of . Career Emmermann began his naval career in 1934. For ... (April–May 1945) Assigned U-boats 156 U-boats were assigned to this flotilla during its service. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Deadlight
Operation Deadlight was the code name for the Royal Navy operation of November 1945 – February 1946 to scuttle German U-boats surrendered to the Allies after the defeat of Germany near the end of World War II. Operation Of the 156 U-boats that surrendered to the allies at the end of the war, 116 were scuttled as part of Operation Deadlight. The Royal Navy carried out the operation, and planned to tow the submarines to three areas about north-west of Ireland and sink them. The areas were codenamed XX, YY, and ZZ. They intended to use XX as the main scuttling area, while towing 36 boats to ZZ to use as practice targets for aerial attack. YY was to be a reserve position where, if the weather was good enough, they could divert submarines from XX to sink with naval forces. Submarines that were not used for target practice were to be sunk with explosive charges, with naval gunfire as a fall-back option if that failed. When Operation Deadlight began, the navy found that many of ... [...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] |
Horst Von Schroeter
__NOTOC__ Horst von Schroeter (10 June 1919, Bieberstein – 25 July 2006) was a German U-boat commander during World War II. He was a recipient of the Knight's Cross of the Iron Cross of Nazi Germany. After World War II he joined the West German Navy and from 1976 to 1979 held the position of Commander of the NATO Naval forces in the Baltic Sea Approaches ( COMNAVBALTAP). U-123 sank the Spanish-registered motor ship Castillo Montealegre on 8 April 1943 west of Conakry, French Guinea. As per maritime rules, the neutral ship had the Spanish flag painted in both sides. Commander Horst von Schroeter ordered the shooting of 3 torpedoes and she sunk in less than a minute. The submarine surfaced, the commander asked from the conning tower "What ship?" to the survivors. Although being confirmed he had just sunk a neutral ship, he left without giving any assistance to the 40 men adrift (five went down with the ship). A few days later the Hill-class naval trawler HMS Inkpen rescued 29 survi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motor–generator
A motor–generator (an M–G set) is a device for converting electrical power to another form. Motor–generator sets are used to convert frequency, voltage, or phase of power. They may also be used to isolate electrical loads from the electrical power supply line. Large motor–generators were widely used to convert industrial amounts of power while smaller motor–generators (such as the one shown in the picture) were used to convert battery power to higher DC voltages. While a motor–generator set may consist of distinct motor and generator machines coupled together, a single unit dynamotor (for dynamo–motor) has the motor coils and the generator coils wound around a single rotor; both the motor and generator therefore share the same outer field coils or magnets.Radio Amateur's Handbook 1976, pub. |
Lisahally
Londonderry Port, now operating as Foyle Port, is a port located on Lough Foyle in Northern Ireland. It is the United Kingdom’s most westerly port and an important northerly port on the island of Ireland. The current port is at Lisahally, County Londonderry, though historically the port was upriver in the city of Derry itself. It is operated by the Londonderry Port and Harbour Commissioners, whose former offices, just north of the city's walls, are now a museum. History The River Foyle has been an entryport since before the time of Saint Columba, and was used by the Vikings and the Normans. At the time the river was wider and more shallow, and as ships grew larger, they would anchor close in to shore and unload by lighter. The planting of the walled city on the west bank of the Foyle necessitated a more efficient approach, and the port of Londonderry was created in 1664 by the charter granted by King Charles II to the Londonderry Corporation making them responsible for its reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lerwick
Lerwick (; non, Leirvik; nrn, Larvik) is the main town and port of the Shetland archipelago, Scotland. Shetland's only burgh, Lerwick had a population of about 7,000 residents in 2010. Centred off the north coast of the Scottish mainland and on the east coast of the Shetland Mainland, Lerwick lies north-by-northeast of Aberdeen; west of the similarly sheltered port of Bergen in Norway; and south east of Tórshavn in the Faroe Islands. One of the UK's coastal weather stations is situated there, with the local climate having small seasonal variation due to the maritime influence. Being located further north than Saint Petersburg and the three mainland Nordic capitals, Lerwick's nights in the middle of summer only get dark twilight and winters have below six hours of complete daylight. History Lerwick is a name with roots in Old Norse and its local descendant, Norn, which was spoken in Shetland until the mid-19th century. The name "Lerwick" means ''bay of clay''. The c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kapitänleutnant
''Kapitänleutnant'', short: KptLt/in lists: KL, ( en, captain lieutenant) is an officer grade of the captains' military hierarchy group () of the German Bundeswehr. The rank is rated OF-2 in NATO, and equivalent to Hauptmann in the Heer and Luftwaffe. It is grade A11 or A12 in the pay rules of the Federal Ministry of Defence. Address In line with ZDv 10/8, the formal manner of addressing people with the rank ''Kapitänleutnant'' (OF-2) is "Herr/Frau Kapitänleutnant". However, in German tradition and in line with seamen's language, the title is abbreviated to "Herr/Frau Kaleu" in verbal communication (contemporary usage). Historically, in the Wehrmacht, the abbreviation spoken was "Herr Kaleun". Rank and assignment The United States Navy's rank of lieutenant is equal to ''Kapitänleutnant'' in NATO's military hierarchy (classed as OF-2). However German Navy ''Kapitänleutnant'' might be assigned to the so-called “line officer career” (de: Truppendienstlaufbahn or Truppe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ship Commissioning
Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship in active duty with its country's military forces. The ceremonies involved are often rooted in centuries-old naval tradition. Ship naming and launching endow a ship hull with her identity, but many milestones remain before she is completed and considered ready to be designated a commissioned ship. The engineering plant, weapon and electronic systems, galley, and other equipment required to transform the new hull into an operating and habitable warship are installed and tested. The prospective commanding officer, ship's officers, the petty officers, and seamen who will form the crew report for training and familiarization with their new ship. Before commissioning, the new ship undergoes sea trials to identify any deficiencies needing corre ... [...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] |
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