|
German Type U 151 Submarine
Type U 151 U-boats were a class of large, long-range submarines initially constructed during World War I to be merchant submarines and later used by the Kaiserliche Marine (Imperial German Navy). Background In addition to the cargo-carrying submarines and (disappeared on a cargo voyage in 1916 while it was still a merchant submarine), six further large cargo submarines were ordered, originally designed to ship material to and from locations otherwise denied German surface ships, such as the United States. On 16 December 1916, four under construction in the Reiherstieg and Flensburger Schiffbau yards were taken over by the navy and converted to military specification as Type U 151 U-boats, being designated to . The remaining two, along with ''Deutschland'', which became , passed into naval control in February 1917, as and . All were fitted with two bow torpedo tubes and could carry 18 torpedoes, with the exception of the former ''Deutschland'', which was fitted with six tubes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Submarine Deutschland
''Deutschland'' was a blockade-breaking German merchant submarine used during World War I. It was developed with private funds and operated by the North German Lloyd Line. She was the first of seven -class U-boats built and one of only two used as unarmed cargo submarines. After making two voyages as an unarmed merchantman, she was taken over by the German Imperial Navy on 19 February 1917 and converted into ''U-155'', armed with six torpedo tubes and two deck guns. As ''U-155'', she began a raiding career in June 1917 that was to last until October 1918, sinking 120,434 GRT of shipping and damaging a further 9,080 GRT of shipping. Construction ''Deutschland'' was one of seven submarines designed to carry cargo between the United States and Germany, through the naval blockade of the Entente Powers. Mainly enforced by Great Britain's Royal Navy, the blockade had led to great difficulties for German companies in acquiring raw materials which could not be found in quantity within ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merchant Submarine
A merchant submarine is a type of submarine intended for trade, and being without armaments, it is not considered a warship like most other types of submarines. The intended use would be blockade running, or to dive under Arctic ice. Strictly speaking, only two submarines have so far been purpose-built for non-military merchant shipping use, outside of criminal enterprises, though standard or partly converted military submarines have been used to transport smaller amounts of important cargo, especially during wartime, and large-scale proposals for modern merchant submarines have been produced by manufacturers. Criminal enterprises have also built transport submarines to avoid authorities, such as narcosubs. Germany Only two merchant submarines were built, both in Germany during World War I. They were constructed to slip through the naval blockade of the Entente Powers, mainly enforced by the efforts of the United Kingdom's Royal Navy. The British blockade had led to great diffi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Classes
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes 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 and the wet sub. Submarines are referred to as ''boats'' rather than ''ships'' irrespective of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and they were adopted by several navies. They were first widely used during World War I (1914–1918), and are now used in many navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, blockade running, nuclear deterrence, reconnaissance, conventional land attack (for example, using a cruise missile), and covert insertion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Mine
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel or a particular vessel type, akin to anti-infantry vs. anti-vehicle mines. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations to declare mined areas, precise locations remain secret; and non-complying individ ... [...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] |
Waldemar Kophamel
Waldemar Kophamel (August 16, 1880 – November 4, 1934) was a highly decorated German U-boat commanding officer in the Imperial German Navy during World War I. Kophamel joined the Imperial German Navy on 12 April 1898 and started his military education on a ship named . At the start of the First World War Kophamel was a ''Kapitänleutnant'' and commanded . In October 1915 he was promoted to ''Korvettenkapitän'' and in December of that year took command of the Pola Flotilla. In July 1917 he returned to sea, in command of U-151 and later . During the war he succeeded sank 55 ships of a total tonnage of , including a large American tanker ''O. B. Jennings'' of 10,289 GRT and a former merchant ship taken up by the Royal Navy as '' HMS Tara'' of 1,862 GRT. He damaged four ships totaling 8,701 GRT, and two warships including . [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Valentiner
Captain Christian August Max Ahlmann Valentiner (15 December 1883 – 19 July 1949) was a German U-boat commander during World War I. He was the third highest-scoring U-boat commander of the war, and was awarded the Pour le Mérite for his achievements. He was also listed as a war criminal by the Allies, for killing hundreds of civilians by sinking the passenger liner without warning on 30 December 1915, contrary to international law. Early life The eldest of the four children of Otto Friedrich Valentiner and Mathilde Julie Valentiner, Valentiner was born in Tondern (Tønder), Province of Schleswig-Holstein. In 1882, the family moved to Ketting on Als where his father held a job as a priest for two years, then moving to Sonderburg (Sønderborg). Valentiner started his time in school in Ketting, then Augustenburg (Augustenborg) and later in Sonderburg on Reimers school. Pre-war military service At the age of 18, he joined the Imperial German Navy of the German Empire on 1 Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cruiser Submarine
A cruiser submarine was a very large submarine designed to remain at sea for extended periods in areas distant from base facilities. Their role was analogous to surface cruisers, cruising distant waters, commerce raiding, and scouting for the battle fleet. Cruiser submarines were successful for a brief period of World War I, but were less successful than smaller submarines during World War II. Large submarines remained vulnerable to damage from defensively equipped merchant ships (DEMS), were slow to dive if found by aircraft, offered a large sonar echo surface, and were less able to defensively maneuver during depth charge attacks.Blair, p.501 History The cruiser submarine concept originated during the unrestricted submarine warfare Unrestricted submarine warfare (February 1917), campaign of 1917. Three German Type U 139 submarines and seven former German Type U 151 submarine, merchant submarines, each armed with two guns, patrolled areas distant from their North Sea bases to sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Type U 139 Submarine
U-139, originally designated "Project 46", was a class of large, long-range U-boats built during World War I by the Kaiserliche Marine. Description Three large U-cruisers, designated Type 139, were ordered from Germaniawerft of Kiel, in August 1916. Displacing nearly 2,000 tons, and with a surface speed of , they were armed with 24 torpedoes and two 15 cm deck guns, and had a cruising range of around . They carried a large enough complement to furnish captured vessels with prize crews and their intended purpose was to capture or destroy merchant ships on the surface; their large-calibre deck guns and comparatively high speed allowed them to engage even armed merchant vessels. Unlike the earlier Type U-151 submarines (originally designed as merchant submarines to evade naval blockades), the Type 139 was designed from the outset for combat service. Four bow and two stern torpedo tubes were fitted, but the main armament was the two 15 cm deck guns, which could be laid o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reiherstieg Schiffswerfte & Maschinenfabrik
Reiherstieg Schiffswerfte & Maschinenfabrik, also known as Reiherstiegwerft, was a German shipbuilding company, located on the Reiherstieg River in Hamburg. It was founded in 1706 by Lucas Kramer. In the 1880s, Reiherstieg built , the first warship built in Hamburg for the German Navy. During World War I Reiherstiegwerft built three U 151 U-boats for the Kaiserliche Marine {{italic title The adjective ''kaiserlich'' means "imperial" and was used in the German-speaking countries to refer to those institutions and establishments over which the ''Kaiser'' ("emperor") had immediate personal power of control. The term wa ..., the ''U-151'', ''U-152'' and ''U-153''. External links roosen.net webpage about ''Reiherstiegwerft''(in German) Manufacturing companies based in Hamburg Manufacturing companies established in 1706 Companies established in 1706 Defunct companies of Germany Shipbuilding companies of Germany 1706 establishments in the Holy Roman Empire {{Hamb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Ship
Surface combatants (or surface ships or surface vessels) are a subset of naval warships which are designed for warfare on the surface of the water, with their own weapons and armed forces. They are generally ships built to fight other ships, submarines, aircraft or land targets, and can carry out several other missions including counter-narcotics operations and maritime interdiction. Their primary purpose is to engage space, air, surface, and submerged targets with weapons deployed from the ship itself, rather than by manned carried craft.Naval Transformational Roadmap . Retrieved 2009-08-29. Surface ships include |
_underway_2009.jpg "Click for more on -> Ship Commissioning")
