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Convoy OB 318
OB 318 was a North Atlantic convoy which ran during the Battle of the Atlantic in World War II. During Operation Primrose Royal Navy convoy escorts , ''Broadway'' and captured with an intact Enigma machine and a wealth of signals intelligence, which led to the Allied breakthrough into cracking the German naval Enigma code. Prelude By the spring of 1941 the battle of the Atlantic was starting to have an increase in German U-boat losses. This forced ''Vizeadmiral'' Karl Dönitz to change his strategy and he now moved his wolf packs further west, in order to catch the convoys without their anti-submarine escort. OB 318 was a west-bound convoy of 38 ships, either in ballast or carrying trade goods, and sailed from Liverpool on 2 May 1941 bound for ports in North America. The convoy commodore was R.Adm. WB MacKenzie in SS ''Colonial''. It was escorted by 7 EG, an escort group led by (Cdr. Bockett-Pugh) and comprising ten warships; these were joined in mid-ocean by 3 EG, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
U-110 And HMS Bulldog
{{disambiguation ...
U11 may refer to: Naval vessels * * , various vessels * , a sloop of the Royal Navy * , a submarine of the Austro-Hungarian Navy Other uses * U11 (Berlin U-Bahn), a planned transit line * U11 (Nuremberg U-Bahn), a discontinued transit line * BMW X1 (U11), a German crossover * HTC U11, a smartphone * Nissan Bluebird (U11), a Japanese sedan * Truncated cuboctahedron * U11 spliceosomal RNA * Udet U 11 Kondor, a German prototype airliner * Uppland Runic Inscription 11 U 11 is the Rundata designation for a runestone that is located near the ruins of the old king's dwelling at Alsnö hus near Hovgården on the island of Adelsö in Sweden. Description This runestone has an intricate design with the runic text wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convoy
A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used in a non-military sense, for example when driving through remote areas. Naval convoys Age of Sail Naval convoys have been in use for centuries, with examples of merchant ships traveling under naval protection dating to the 12th century. The use of organized naval convoys dates from when ships began to be separated into specialist classes and national navies were established. By the French Revolutionary Wars of the late 18th century, effective naval convoy tactics had been developed to ward off pirates and privateers. Some convoys contained several hundred merchant ships. The most enduring system of convoys were the Spanish treasure fleets, that sailed from the 1520s until 1790. When merchant ships sailed independently, a privateer cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Approaches
The Western Approaches is an approximately rectangular area of the Atlantic Ocean lying immediately to the west of Ireland and parts of Great Britain. Its north and south boundaries are defined by the corresponding extremities of Britain. The coast of the mainland forms the eastern side and the western boundary is the 30 degree meridian, which passes through Iceland. The area is particularly important to the United Kingdom, because many of its larger shipping ports lie within it. The term is most commonly used when discussing naval warfare, notably during the First World War and Battle of the Atlantic during the Second World War in which Nazi Germany's ''Kriegsmarine'' attempted to blockade the United Kingdom using submarines (U-boats) operating in this area. Since almost all shipping to and from the United Kingdom passed through this area, it was an excellent hunting ground and had to be heavily defended. See also *Irish Sea *GIUK gap *Long Forties * Broad Fourteens *Western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passenger Ship
A passenger ship is a merchant ship whose primary function is to carry passengers on the sea. The category does not include cargo vessels which have accommodations for limited numbers of passengers, such as the ubiquitous twelve-passenger freighters once common on the seas in which the transport of passengers is secondary to the carriage of freight. The type does however include many classes of ships designed to transport substantial numbers of passengers as well as freight. Indeed, until recently virtually all ocean liners were able to transport mail, package freight and express, and other cargo in addition to passenger luggage, and were equipped with cargo holds and derricks, kingposts, or other cargo-handling gear for that purpose. Only in more recent ocean liners and in virtually all cruise ships has this cargo capacity been eliminated. While typically passenger ships are part of the merchant marine, passenger ships have also been used as troopships and often are commissio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fritz-Julius Lemp
Fritz-Julius Lemp (19 February 1913 – 9 May 1941) was a captain in the Kriegsmarine during World War II and commander of , and . He sank the British passenger liner in September 1939, in violation of the Hague conventions. Germany's responsibility for the sinking was suppressed by Admiral Karl Dönitz and the Nazi propaganda. Lemp died on 9 May 1941 when the U-boat he commanded was captured. Career Sinking of SS ''Athenia'' On 3 September 1939, while in command of ''U-30'', he sank the 13,581 ton passenger ship , the first British ship sunk in World War II. Lemp later claimed that the fact she was steering a zigzag course which seemed to be well off the normal shipping routes made him believe she was either a troopship or an armed merchant cruiser; when he realized his error he took the first steps to conceal the facts by omitting to make an entry in the submarine's log, and swearing his crew to secrecy. Adolf Hitler decided the incident should be kept secret for politic ... [...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] |
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liverpool
Liverpool is a city and metropolitan borough in Merseyside, England. With a population of in 2019, it is the 10th largest English district by population and its metropolitan area is the fifth largest in the United Kingdom, with a population of 2.24 million. On the eastern side of the Mersey Estuary, Liverpool historically lay within the ancient hundred of West Derby in the county of Lancashire. It became a borough in 1207, a city in 1880, and a county borough independent of the newly-created Lancashire County Council in 1889. Its growth as a major port was paralleled by the expansion of the city throughout the Industrial Revolution. Along with general cargo, freight, and raw materials such as coal and cotton, merchants were involved in the slave trade. In the 19th century, Liverpool was a major port of departure for English and Irish emigrants to North America. It was also home to both the Cunard and White Star Lines, and was the port of registry of the ocean li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vizeadmiral
(abbreviated VAdm) is a senior naval flag officer rank in several German-speaking countries, equivalent to Vice admiral. Austria-Hungary In the Austro-Hungarian Navy there were the flag-officer ranks ''Kontreadmiral'' (also spelled ''Konterdmiral'' in the 20th century), ''Viceadmiral'' , and ''Admiral'', as well as ''Großadmiral''. Belgium In the Belgian Navy, the rank is known as , and . Germany Rank insignia and rating Its rank insignia, worn on the sleeves and shoulders, are one five-pointed star above a big gold stripe and two normal ones (without the star when rank loops are worn). It is grade B8 in the pay rules of the Federal Ministry of Defence. The sequence of ranks (top-down approach) in that particular group is as follows: *OF-9: Admiral (Germany) / General (Germany) *OF-8: Vizeadmiral / Generalleutnant *OF-7: Konteradmiral / Generalmajor *OF-6: Flottillenadmiral / Brigadegeneral History Imperial German Navy and ''Kriegsmarine'' In the ''Ka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptanalysis Of The Enigma
Cryptanalysis of the Enigma ciphering system enabled the western Allies in World War II to read substantial amounts of Morse-coded radio communications of the Axis powers that had been enciphered using Enigma machines. This yielded military intelligence which, along with that from other decrypted Axis radio and teleprinter transmissions, was given the codename '' Ultra''. The Enigma machines were a family of portable cipher machines with rotor scramblers. Good operating procedures, properly enforced, would have made the plugboard Enigma machine unbreakable. However, most of the German military forces, secret services, and civilian agencies that used Enigma employed poor operating procedures, and it was these poor procedures that allowed the Enigma machines to be reverse-engineered and the ciphers to be read. The German plugboard-equipped Enigma became Nazi Germany's principal crypto-system. In December 1932 it was "broken" by mathematician Marian Rejewski at the Polish G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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