1.
German submarine U-3008
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The German submarine U-3008 was a Type XXI U-boat of Nazi Germanys Kriegsmarine that served in the United States Navy for several years after World War II. Her keel was laid down on 2 July 1944 by DeSchiMAG AG Weser of Bremen, in March 1945 Schlömer was relieved by Kapitänleutnant Helmut Manseck who commanded the boat until Nazi Germanys surrender on 8 May. Like all Type XXI U-boats, U-3008 had a displacement of 1,621 tonnes when at the surface and 1,819 tonnes while submerged. She had a length of 76.70 m, a beam length of 8 m. The submarine had a surface speed of 15.6 knots. When running on silent motors the boat could operate at a speed of 6.1 knots, when submerged, the boat could operate at 5 knots for 340 nautical miles, when surfaced, she could travel 15,500 nautical miles at 10 knots. U-3008 was fitted with six 53.3 cm torpedo tubes in the bow and she could carry twenty-three torpedoes or seventeen torpedoes and twelve mines. The complement was five officers and fifty-two men, U-3008 left Wilhelmshaven for patrol on 3 May 1945, but returned to port after the surrender. On 21 June 1945 she was taken by the Allies from Wilhelmshaven to Loch Ryan, thence transferred to the United States, reaching New London, Connecticut, unterseeboot 3008 was then formally renamed USS U-3008. On 13 September, she moved to Portsmouth, New Hampshire, work proceeded on an intermittent basis due to the lack of final and total approval of the vessels allocation to the United States by the Allied powers concerned. However, by the spring of 1946, the shipyard received orders to proceed with the overhaul as expeditiously as possible. U-3008s overhaul was completed by mid-summer, and she went into service on 24 July 1946 with Commander Everett H. Steinmetz in charge, U-3008 was assigned initially to Submarine Squadron 2 and operated along the New England coast out of New London and Portsmouth. That duty continued until 31 March 1947, when she departed New London bound ultimately for Key West, Florida, en route, the U-boat stopped off at Norfolk, Virginia, for three weeks of underway operations with Task Force 67. She continued south on 19 April and arrived at Key West on 23 April, there, she reported for duty with SubRon 4 and began working with the Operational Development Force. That duty involved the development of submarine and antisubmarine tactics and lasted until October 1947 when she returned to New London, the U-boat conducted operations out of New London and Portsmouth between October 1947 and February 1948. On 28 February, she out of New London to return to Florida. She reached Key West on 5 March and resumed duty with the Operational Development Force and she remained so engaged until the end of the first week in June. On 7 June, she headed once more and arrived in Portsmouth on 11 June
2.
Kriegsmarine
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The Kriegsmarine was the navy of Nazi Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire and the inter-war Reichsmarine, the Kriegsmarine was one of three official branches—along with the Heer and the Luftwaffe —of the Wehrmacht, the armed forces of Nazi Germany. The Kriegsmarine grew rapidly during German naval rearmament in the 1930s, Kriegsmarine ships were deployed to the waters around Spain during the Spanish Civil War, under the guise of enforcing non-intervention, but in reality supporting the Franco side of the war. In January 1939 Plan Z was ordered, calling for naval parity with the Royal Navy by 1944, however, when World War II broke out in September 1939, Plan Z was shelved in favour of building submarines and prioritizing land and air forces. The Commander-in-Chief of the Kriegsmarine was Adolf Hitler, who exercised his authority through the Oberkommando der Marine, the Kriegsmarines most famous ships were the U-boats, most of which were constructed after Plan Z was abandoned at the beginning of World War II. However, the adoption of convoy escorts, especially in the Atlantic, after the Second World War, the Kriegsmarines remaining ships were divided up amongst the Allied powers and were used for various purposes including minesweeping. Adolf Hitler was the Commander-in-Chief of all German armed forces, including the Kriegsmarine and his authority was exercised through the Oberkommando der Marine, or OKM, with a Commander-in-Chief, a Chief of Naval General Staff and a Chief of Naval Operations. The first Commander-in-Chief of the OKM was Erich Raeder who was the Commander-in-Chief of the Reichsmarine when it was renamed and reorganized in 1935, Raeder held the post until falling out with Hitler after the German failure in the Battle of the Barents Sea. He was replaced by Karl Dönitz on 30 January 1943 who held the command until he was appointed President of Germany upon Hitlers suicide in April 1945, hans-Georg von Friedeburg was then Commander-in-Chief of the OKM for the short period of time until Germany surrendered in May 1945. Subordinate to these were regional, squadron and temporary flotilla commands, regional commands covered significant naval regions and were themselves sub-divided, as necessary. They were commanded by a Generaladmiral or an Admiral, there was a Marineoberkommando for the Baltic Fleet, Nord, Nordsee, Norwegen, Ost/Ostsee, Süd and West. The Kriegsmarine used a form of encoding called Gradnetzmeldeverfahren to denote regions on a map, each squadron also had a command structure with its own Flag Officer. The commands were Battleships, Cruisers, Destroyers, Submarines, Torpedo Boats, Minesweepers, Reconnaissance Forces, Naval Security Forces, Big Guns and Hand Guns, major naval operations were commanded by a Flottenchef. The Flottenchef controlled a flotilla and organized its actions during the operation, the commands were, by their nature, temporary. As a result the German surface fleet was plagued by design flaws throughout the war, military aircraft were also banned, so Germany could have no naval aviation. Under the treaty Germany could only build new ships to replace old ones, All the ships allowed and personnel were taken over from the Kaiserliche Marine, renamed Reichsmarine. From the outset, Germany worked to circumvent the restrictions of the Treaty of Versailles. The launching of the first pocket battleship, Deutschland in 1931 was a step in the formation of a modern German fleet, modern destroyers and light cruisers were also built
3.
French Navy
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The French Navy, informally La Royale, is the maritime arm of the French Armed Forces. As of June 2014, the French Navy employed a total of 36,776 personnel, the reserve element of the French Navy consisted of 4,827 personnel of the Operational Reserve. The French naval fleet includes more than a hundred vessels and nuclear type submarines, the history of the French Navy dates back to the History of the French Navy of Antiquity to the Renaissance, part of the History of the French Navy. The French Royal Navy was quasi inexistent prior 1624, the Ordre de Saint-Jean de Jérusalem, which was both a religious and military order, had its own respective international war fleet which assured the policing of the seas in the Mediterranean. The members which had satisfied obligations for periods in service at sea fulfilling their service, were granted the rank of Knights Hospitaller, however, many considered the naval service formation to integrate later, while being well formed, their respective navy. The Ordre de Saint-Jean de Jérusalem was one of the ancestors of the French naval schools and in principal, the Order accordingly formed most of the ships Captains, Officers of the French Royal Navy and Admirals of the Marine française de guerre de la Méditerranée. During the Revolution, the French Navy succeeded to the French Royal Navy, under the First French Empire and the Second French Empire, the navy was designated as the Imperial French Navy. The French Navy is still designated today familiarly as La Royale and this expression was used by commercial sailors due to their military service at the corps of the navy by the institution of maritime inscription. The implementation then of the Ministère de la Marine later the de la Marine de guerre française at rue Royale. The symbol of the French Navy, which was since origin a golden anchor » and this symbol featured on all naval vessels, the arms, uniforms, the couriers, equipment, and general arms of the navy. This symbol was replaced in 1990 by a logo featuring a bow section of a warship with two ascending red and blue spray foams, and the inscription Marine nationale. The Chief of Staff of the French Navy was Admiral Bernard Louzeau, the navy became a consistent instrument of national power around the seventeenth century with Richelieus efforts under Louis XIII, and Colberts under Louis XIV. Under the tutelage of the Sun King, the French Navy was well-financed and -equipped, managing to score several victories in the Nine Years War against the Royal Navy. Financial troubles, however, forced the navy back to port and allowed the English, before the Nine Years War, in the Franco-Dutch War, it managed to score a decisive victory over a combined Spanish-Dutch fleet at the Battle of Palermo. The French Navy scored various successes, as in the campaigns led in the Atlantic by Picquet de la Motte, in 1766, Bougainville led the first French circumnavigation. During the American Revolutionary War the French Navy played a role in supporting the Americans. French warships participated in the battle by bombarding British ground forces, in India, Suffren waged campaigns against the British, successfully contending for supremacy against Vice-Admiral Sir Edward Hughes. In the Mediterranean, the French Navy waged a campaign during a 1798 French invasion of Egypt
4.
German Navy
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The German Navy is the navy of Germany and part of the unified Bundeswehr, the German Armed Forces. The German Navy was originally known as the Bundesmarine from 1956 until 1995 when Deutsche Marine became the name with respect to the 1990 incorporation of the East German Volksmarine. It is deeply integrated into the NATO alliance and its primary mission is protection of Germanys territorial waters and maritime infrastructure as well as sea lines of communication. Apart from this, the German Navy participates in peacekeeping operations and they also participate in Anti-Piracy operations. The German Navy traces its roots back to the Reichsflotte of the era of 1848–52. The Reichsflotte was the first German navy to sail under the black-red-gold flag, in 1956, with West Germanys accession to NATO, the Bundesmarine, as the navy was known colloquially, was formally established. In the same year the East German Volkspolizei See became the Volksmarine, during the Cold war the all of the German Navys combat vessels were assigned to NATOs Allied Forces Baltic Approachess naval command NAVBALTAP. With the accession of East Germany to the Federal Republic of Germany in 1990 the Volksmarine along with the whole National Peoples Army became part of the Bundeswehr. Since 1995 the name German Navy is used in international context, as of 16 December 2016, the strength of the navy is 16,137 men and women. A number of forces have operated in different periods. The German Navy is also engaged in operations against international terrorism such as Operation Enduring Freedom, presently the largest operation the German Navy is participating in is UNIFIL off the coast of Lebanon. The German contribution to this operation is two frigates, four fast attack craft, and two auxiliary vessels, the naval component of UNIFIL has been under German command. The navy is operating a number of development and testing installations as part of an inter-service, among these is the Centre of Excellence for Operations in Confined and Shallow Waters, an affiliated centre of Allied Command Transformation. The COE CSW was established in April 2007 and officially accredited by NATO on 26 May 2009 and it is co-located with the staff of the German Flotilla 1 in Kiel whose Commander is double-hatted as Director, COE CSW. The displacement of the navy is 220,000 tonnes, in addition, the German Navy and the Royal Danish Navy are in cooperation in the Ark Project. This agreement made the Ark Project responsible for the strategic sealift of German armed forces where the charter of three roll-on-roll-off cargo and troop ships are ready for deployments. In addition, these ships are kept available for the use of the other European NATO countries. The three vessels have a displacement of 60,000 tonnes
5.
Royal Navy
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The Royal Navy is the United Kingdoms naval warfare force. Although warships were used by the English kings from the medieval period. The modern Royal Navy traces its origins to the early 16th century, from the middle decades of the 17th century and through the 18th century, the Royal Navy vied with the Dutch Navy and later with the French Navy for maritime supremacy. From the mid 18th century it was the worlds most powerful navy until surpassed by the United States Navy during the Second World War. The Royal Navy played a key part in establishing the British Empire as the world power during the 19th. Due to this historical prominence, it is common, even among non-Britons, following World War I, the Royal Navy was significantly reduced in size, although at the onset of the Second World War it was still the worlds largest. By the end of the war, however, the United States Navy had emerged as the worlds largest, during the Cold War, the Royal Navy transformed into a primarily anti-submarine force, hunting for Soviet submarines, mostly active in the GIUK gap. The Royal Navy is part of Her Majestys Naval Service, which includes the Royal Marines. The professional head of the Naval Service is the First Sea Lord, the Defence Council delegates management of the Naval Service to the Admiralty Board, chaired by the Secretary of State for Defence. The strength of the fleet of the Kingdom of England was an important element in the power in the 10th century. English naval power declined as a result of the Norman conquest. Medieval fleets, in England as elsewhere, were almost entirely composed of merchant ships enlisted into service in time of war. Englands naval organisation was haphazard and the mobilisation of fleets when war broke out was slow, early in the war French plans for an invasion of England failed when Edward III of England destroyed the French fleet in the Battle of Sluys in 1340. Major fighting was confined to French soil and Englands naval capabilities sufficed to transport armies and supplies safely to their continental destinations. Such raids halted finally only with the occupation of northern France by Henry V. Henry VII deserves a large share of credit in the establishment of a standing navy and he embarked on a program of building ships larger than heretofore. He also invested in dockyards, and commissioned the oldest surviving dry dock in 1495 at Portsmouth, a standing Navy Royal, with its own secretariat, dockyards and a permanent core of purpose-built warships, emerged during the reign of Henry VIII. Under Elizabeth I England became involved in a war with Spain, the new regimes introduction of Navigation Acts, providing that all merchant shipping to and from England or her colonies should be carried out by English ships, led to war with the Dutch Republic. In the early stages of this First Anglo-Dutch War, the superiority of the large, heavily armed English ships was offset by superior Dutch tactical organisation and the fighting was inconclusive
6.
Soviet Navy
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The Soviet Navy was the naval arm of the Soviet Armed Forces. The influence of the Soviet Navy played a role in the Cold War. The Soviet Navy was divided into four major fleets, the Northern, Pacific, Black Sea, the Caspian Flotilla was a smaller force operating in the land-locked Caspian Sea. Main components of the Soviet Navy included Soviet Naval Aviation, Naval Infantry, most of the Soviet Navy was reformed into the Russian Navy after the dissolution of the Soviet Union in 1991, while some elements became the basis of the Ukrainian, Azerbaijani and Georgian navies. During the revolution, sailors deserted their ships at will and generally neglected their duties, the officers were dispersed and most of the sailors left their ships. Work stopped in the shipyards, where uncompleted ships deteriorated rapidly, the Black Sea Fleet fared no better than the Baltic. The Bolshevik revolution entirely disrupted its personnel, with murders of officers. At the end of April 1918, German troops entered Crimea, the more effective ships were moved from Sevastopol to Novorossiysk where, after an ultimatum from Germany, they were scuttled by Vladimir Lenins order. The ships remaining in Sevastopol were captured by the Germans and then, after November 1918, on 1 April 1919, when Red Army forces captured Crimea, the British squadron had to withdraw, but before leaving they damaged all the remaining battleships and sank thirteen new submarines. When the White Army captured Crimea in 1919, it rescued and reconditioned a few units, at the end of the civil war, Wrangels fleet, a White fleet, moved to Bizerta in French Tunisia, where it was interned. The first ship of the navy could be considered the rebellious Imperial Russian cruiser Aurora. Sailors of the Baltic fleet supplied the fighting force of the Bolsheviks during the October Revolution, some imperial vessels continued to serve after the revolution, albeit with different names. The Soviet Navy, established as the Workers and Peasants Red Fleet by a 1918 decree of the Soviet government, was less than service-ready during the interwar years, as the countrys attentions were largely directed internally, the Navy did not have much funding or training. The greater part of the old fleet was sold by the Soviet government to Germany for scrap, in the Baltic Sea there remained only three much-neglected battleships, two cruisers, some ten destroyers, and a few submarines. Despite this state of affairs, the Baltic Fleet remained a significant naval formation, there also existed some thirty minor-waterways combat flotillas. During the 1930s, as the industrialization of the Soviet Union proceeded, approved by the Labour and Defence Council in 1926, the Naval Shipbuilding Program included plans to construct twelve submarines, the first six were to become known as the Dekabrist class. Beginning 4 November 1926, Technical Bureau Nº4, under the leadership of B. M, malinin, managed the submarine construction works at the Baltic Shipyard. In subsequent years,133 submarines were built to designs developed during Malinins management, additional developments included the formation of the Pacific Fleet in 1932 and the Northern Fleet in 1933
7.
United States Navy
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The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U. S. Navy is the largest, most capable navy in the world, the U. S. Navy has the worlds largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 323,792 personnel on duty and 108,515 in the Navy Reserve. It has 274 deployable combat vessels and more than 3,700 operational aircraft as of October 2016, the U. S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. It played a role in the American Civil War by blockading the Confederacy. It played the role in the World War II defeat of Imperial Japan. The 21st century U. S. Navy maintains a global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean. The Navy is administratively managed by the Department of the Navy, the Department of the Navy is itself a division of the Department of Defense, which is headed by the Secretary of Defense. The Chief of Naval Operations is an admiral and the senior naval officer of the Department of the Navy. The CNO may not be the highest ranking officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression, the United States Navy is a seaborne branch of the military of the United States. The Navys three primary areas of responsibility, The preparation of naval forces necessary for the prosecution of war. The development of aircraft, weapons, tactics, technique, organization, U. S. Navy training manuals state that the mission of the U. S. Armed Forces is to prepare and conduct prompt and sustained combat operations in support of the national interest, as part of that establishment, the U. S. Navys functions comprise sea control, power projection and nuclear deterrence, in addition to sealift duties. It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, the Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors, captains, and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia, the establishment of a national navy was an issue of debate among the members of the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, detractors countered that challenging the British Royal Navy, then the worlds preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships, and reported the captures to the Congress
8.
Reichsmark
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The Reichsmark was subdivided into 100 Reichspfennig. The Mark is an ancient Germanic weight measure, traditionally a half pound, from 1871 to 1918 Germany was called the Kaiserreich, or the Deutsches Reich. Although Germany became a republic in 1919, the term Reich remained part of the official name. The Reichsmark was introduced in 1924 as a permanent replacement for the Papiermark and this was necessary due to the 1920s German inflation which had reached its peak in 1923. The exchange rate between the old Papiermark and the Reichsmark was 1 ℛℳ =1012 Papiermark, the Reichsmark was put on the gold standard at the rate previously used by the Goldmark, with the U. S. dollar worth 4.2 ℛℳ. As the market crash of 1929 expanded into the Great Depression and it retained a gold peg at that time. Hyper inflation ensued to the point it was cheaper to burn reichsmark paper notes than to buy fire wood, a number of companies were created with inadequate capital for their operations and authorized to issue bonds exchangeable at a 1,1 rate for Reichsmarks and sold at a discount. The Reichsbank rediscounted the bills of these companies creating a monetary expansion without formally renouncing the link to gold, Deutsche Gesellschaft für öffentliche Arbeiten AG, founded 1 August 1930, ended up issuing 1.26 billion Reichsmarks of Öffa bills to finance public construction. It formed the model for further fraudulent issues of bills. MEFO was a company that was formed with relatively small amounts of capital that was used to finance German rearmament off the books. It issued bills without backing by its own resources but which were guaranteed redeemable at 1,1 for Reichsmarks for five years by the government, the MEFO bills amounts were considered a state secret and were an important element in the impression that Hitlerian economics was a success. This company essentially created an amount of Reichsmarks off the books. With the unification of Germany and Austria in 1938, the Reichsmark replaced the Schilling in Austria. The rates were as follows, After the Second World War, the Reichsmark continued to circulate in Germany, in practice, massive inflation dating back to the latter stages of the war had rendered the Reichsmark nearly worthless. For all intents and purposes, it was supplanted by a barter economy, the Reichsmark was replaced in June 1948 by the Deutsche Mark in the Trizone and later in the same year by the East German Mark in East Germany. Tenenbaum of the US military government, and was executed abruptly on 21 June 1948, three days later, the new currency also replaced the Reichsmark in the three Western sectors of Berlin. In November 1945, the Reichsmark was superseded by the Allied Military Schilling in Austria, in 1947 a local currency was introduced in the Saar. In 1924, coins were introduced in denominations of 1,2,5,10, and 50 Reichspfennig, the 1 and 2 Reichspfennig were struck in bronze, and depicting a wheat sheaf
9.
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
10.
Tonne
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The SI symbol for the tonne is t, adopted at the same time as the unit itself in 1879. Its use is also official, for the metric ton, within the United States, having been adopted by the US National Institute of Standards and it is a symbol, not an abbreviation, and should not be followed by a period. Informal and non-approved symbols or abbreviations include T, mT, MT, in French and all English-speaking countries that are predominantly metric, tonne is the correct spelling. Before metrication in the UK the unit used for most purposes was the Imperial ton of 2,240 pounds avoirdupois, equivalent to 1,016 kg, differing by just 1. 6% from the tonne. Ton and tonne are both derived from a Germanic word in use in the North Sea area since the Middle Ages to designate a large cask. A full tun, standing about a high, could easily weigh a tonne. An English tun of wine weighs roughly a tonne,954 kg if full of water, in the United States, the unit was originally referred to using the French words millier or tonneau, but these terms are now obsolete. The Imperial and US customary units comparable to the tonne are both spelled ton in English, though they differ in mass, one tonne is equivalent to, Metric/SI,1 megagram. Equal to 1000000 grams or 1000 kilograms, megagram, Mg, is the official SI unit. Mg is distinct from mg, milligram, pounds, Exactly 1000/0. 453 592 37 lb, or approximately 2204.622622 lb. US/Short tons, Exactly 1/0. 907 184 74 short tons, or approximately 1.102311311 ST. One short ton is exactly 0.90718474 t, imperial/Long tons, Exactly 1/1. 016 046 9088 long tons, or approximately 0.9842065276 LT. One long ton is exactly 1.0160469088 t, for multiples of the tonne, it is more usual to speak of thousands or millions of tonnes. Kilotonne, megatonne, and gigatonne are more used for the energy of nuclear explosions and other events. When used in context, there is little need to distinguish between metric and other tons, and the unit is spelt either as ton or tonne with the relevant prefix attached. *The equivalent units columns use the short scale large-number naming system used in most English-language countries. †Values in the equivalent short and long tons columns are rounded to five significant figures, ǂThough non-standard, the symbol kt is also sometimes used for knot, a unit of speed for sea-going vessels, and should not be confused with kilotonne. A metric ton unit can mean 10 kilograms within metal trading and it traditionally referred to a metric ton of ore containing 1% of metal. In the case of uranium, the acronym MTU is sometimes considered to be metric ton of uranium, in the petroleum industry the tonne of oil equivalent is a unit of energy, the amount of energy released by burning one tonne of crude oil, approximately 42 GJ
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