1.
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
2.
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
3.
Royal Canadian Navy
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The Royal Canadian Navy is the naval force of Canada. The RCN is one of three environmental commands within the unified Canadian Armed Forces, as of 2017 Canadas navy operates 12 frigates,4 patrol submarines,12 coastal defence vessels and 8 unarmed patrol/training vessels, as well as several auxiliary vessels. The Royal Canadian Navy consists of 8,500 Regular Force and 5,100 Primary Reserve sailors, vice-Admiral Ron Lloyd is the current Commander of the Royal Canadian Navy and Chief of the Naval Staff. In 2011, its title of Royal Canadian Navy was restored. The bill received assent on 4 May 1910. Initially equipped with two former Royal Navy vessels, HMCS Niobe and HMCS Rainbow, the service was renamed Royal Canadian Navy by King George V on 29 August 1911. At the outbreak of the Second World War, the Navy had 11 combat vessels,145 officers and 1,674 men, during the Second World War, the Royal Canadian Navy expanded significantly, ultimately gaining responsibility for the entire Northwest Atlantic theatre of war. During the Battle of the Atlantic, the RCN sank 31 U-boats and sank or captured 42 enemy surface vessels, the Navy lost 24 ships and 1,797 sailors in the war. In 1940–41, the Royal Canadian Navy Reserves scheme for training yacht club members developed the first central registry system, from 1950 to 1955, during the Korean War, Canadian destroyers maintained a presence off the Korean peninsula, engaging in shore bombardments and maritime interdiction. During the Cold War, the Navy developed a capability to counter the growing Soviet naval threat. At that time, Canada was also operating a carrier, HMCS Bonaventure, flying the McDonnell F2H Banshee fighter jet until 1962. In 1968, under the Liberal government of Lester B, pearson, the Royal Canadian Navy, Royal Canadian Air Force and Canadian Army were amalgamated to form the unified Canadian Forces. This process was overseen by then–Defence Minister Paul Hellyer, the controversial merger resulted in the abolition of the Royal Canadian Navy as a separate legal entity. All personnel, ships, and aircraft became part of Maritime Command, ship-borne aircraft continued to be under the command of MARCOM, while shore-based patrol aircraft of the former Royal Canadian Air Force were transferred to MARCOM. In 1975 Air Command was formed and all aircraft were transferred to Air Commands Maritime Air Group. The unification of the Canadian Forces in 1968 was the first time that a nation with a military combined its formerly separate naval, land. In 1990, Canada deployed three warships to support the Operation Friction, later in the decade, ships were deployed to patrol the Adriatic Sea during the Yugoslav Wars and the Kosovo War. More recently, Maritime Command provided vessels to serve as a part of Operation Apollo, the Royal Canadian Navy is headquartered at National Defence Headquarters in Ottawa, Ontario
4.
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
5.
Imperial Japanese Navy
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The Imperial Japanese Navy was the navy of the Empire of Japan from 1868 until 1945, when it was dissolved following Japans defeat and surrender in World War II. The Japan Maritime Self-Defense Force was formed after the dissolution of the IJN, the Japanese Navy was the third largest navy in the world by 1920, behind the Royal Navy and the United States Navy. It was supported by the Imperial Japanese Navy Air Service for aircraft and it was the primary opponent of the Western Allies in the Pacific War. This eventually led to the Meiji Restoration, accompanying the re-ascendance of the Emperor came a period of frantic modernization and industrialization. Following the attempts at Mongol invasions of Japan by Kubilai Khan in 1274 and 1281, Japan undertook major naval building efforts in the 16th century, during the Warring States period, when feudal rulers vying for supremacy built vast coastal navies of several hundred ships. Around that time Japan may have developed one of the first ironclad warships when Oda Nobunaga, in 1588 Toyotomi Hideyoshi issued a ban on Wakō piracy, the pirates then became vassals of Hideyoshi, and comprised the naval force used in the Japanese invasion of Korea. Japan built her first large ocean-going warships in the beginning of the 17th century, from 1604 the Bakufu also commissioned about 350 Red seal ships, usually armed and incorporating some Western technologies, mainly for Southeast Asian trade. For more than 200 years, beginning in the 1640s, the Japanese policy of seclusion forbade contacts with the outside world and prohibited the construction of ocean-going ships on pain of death. Contacts were maintained, however, with the Dutch through the port of Nagasaki, the Chinese also through Nagasaki and the Ryukyus and Korea through intermediaries with Tsushima. Apart from Dutch trade ships no other Western vessels were allowed to enter Japanese ports, an exception was during the Napoleonic wars. However frictions with foreign ships started from the beginning of the 19th century, the Nagasaki Harbour Incident involving the HMS Phaeton in 1808 and other subsequent incidents in the following decades led to the Shogunate to enact an edict to repel foreign vessels. Western ships which were increasing their presence around Japan due to whaling, the shogunate also began to strengthen the nations coastal defenses. Numerous attempts to open Japan ended in failure in part to Japanese resistance, during 1853 and 1854, American warships under the command of Commodore Matthew Perry entered Edo Bay and made demonstrations of force requesting trade negotiations. After two hundred years of seclusion the 1854 Convention of Kanagawa led to the opening of Japan to international trade and this was soon followed by the 1858 Treaty of Amity and Commerce and treaties with other powers. In 1855, with Dutch assistance, the Shogunate acquired its first steam warship, Kankō Maru, samurai such as the future Admiral Enomoto Takeaki were sent by the Shogunate to study in the Netherlands for several years. In 1859 the Naval Training Center relocated to Tsukiji in Tokyo, in 1857 the Shogunate acquired its first screw-driven steam warship Kanrin Maru and used it as an escort for the 1860 Japanese delegation to the United States. In 1865 the French naval engineer Léonce Verny was hired to build Japans first modern naval arsenals, at Yokosuka, in 1867–1868 a British Naval mission headed by Commander Richard Tracey went to Japan to assist the development of the Japanese Navy and to organize the naval school of Tsukiji. The Shogunate also allowed and then ordered various domains to purchase warships and to develop naval fleets, Satsuma, a naval center had been set up by the Satsuma domain in Kagoshima, students were sent abroad for training and a number of ships were acquired
6.
Wickes-class destroyer
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The Wickes-class destroyers were a class of 111 destroyers built by the United States Navy in 1917–19. Along with the 6 preceding Caldwell-class and 156 subsequent Clemson-class destroyers, only a few were completed in time to serve in World War I, including USS Wickes, the lead ship of the class. While some were scrapped in the 1930s, the rest served through World War II, most of these were converted to other uses, nearly all in U. S. service had half their boilers and one or more stacks removed to increase fuel and range or accommodate troops. Others were transferred to the British Royal Navy and the Royal Canadian Navy, All were scrapped within a few years after World War II. The destroyer type was at time a relatively new class of fighting ship for the U. S. Navy. The type arose in response to torpedo boats that had been developing from 1865, a series of destroyers had been built over the preceding years, designed for high smooth water speed, with indifferent results, especially poor performance in heavy seas and poor fuel economy. The lesson of these destroyers was the appreciation of the need for true seakeeping and seagoing abilities. There were few cruisers in the Navy, which was a fleet of battleships and destroyers so destroyers performed scouting missions. A report of October 1915 by Captain W. S. Sims noted that the smaller destroyers used fuel far too quickly, and that war games showed the need for fast vessels with a larger radius of action. As a result, the size of U. S. destroyer classes increased steadily, starting at 450 tons and rising to over 1,000 tons between 1905 and 1916. The increase in size has never stopped, with some US Arleigh Burke-class destroyers now up to 10,800 tons full load. With World War I then in its year and tensions between the U. S. and Germany increasing, the U. S. needed to expand its navy. The Naval Appropriation Act of 1916 called for a second to none. The Act authorized 10 battleships,6 Lexington-class battlecruisers,10 Omaha-class scout cruisers, a subsequent General Board recommendation for further destroyers to combat the submarine threat resulted in a total of 267 Wickes- and Clemson-class destroyers completed. However, the design of the ships remained optimized for operation with the battleship fleet, the requirements of the new design were high speed and mass production. The development of warfare during World War I created a requirement for destroyers in numbers that had not been contemplated before the war. A top speed of 35 knots was needed for operation with the Lexington battlecruisers, the final design had a flush deck and four smokestacks. It was a fairly straightforward evolution of the preceding Caldwell class, General dissatisfaction with the earlier 1,000 ton designs led to the fuller hull form of the flush deck type
7.
Farragut-class destroyer (1934)
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The Farragut-class destroyers were a class of eight 1, 365-ton destroyers in the United States Navy, and the first US destroyers of post-World War I design. Their construction, along with the Porter class, was authorized by Congress on 29 April 1916, limited to 1,500 tons standard displacement by the provisions of the London Naval Treaty of 1930, the ships were laid down beginning in 1932 and were completed by 1935. After 12 years since the last of the class of American destroyers was commissioned. These ships were larger than their predecessors, faster. The class was the first of six classes of 1, 500-ton destroyers built in the 1930s to modernize the United States Navy, after numerous incremental improvements, the 1, 500-tonners were succeeded by the 2, 100-ton Fletcher class, which was not subject to treaty restrictions. The Farraguts were an improvement from previous destroyers, taking advantage of technological advances during the 12-year gap in destroyer production. The impact of aircraft on naval warfare was reflected in their heavy main gun armament. They also had greatly improved machinery and greater fuel capacity that extended their range to 5,980 nautical miles as opposed to the Clemsons 4,900 nautical miles and their larger size and improved habitability soon earned them the nickname of goldplaters from the crews of older destroyers. The list of desired improvements compiled from the experience of the earlier Wickes. Both classes had pointed sterns that deeply dug into the water and this was addressed with the transom stern design of the Farragut class. The previous classes were flush deck designs, while providing good hull strength and this was addressed with the raised forecastle employed on the Farragut class. The Farragut class corrected this range deficiency by having a range of 5,980 nautical miles as opposed to the Clemsons 4,900 nautical miles. Steady improvements to boilers and steam turbines in the years between the Clemson and Farragut designs allowed this improved range, along with greater speed and a reduction from 4 to 2 stacks. Those advantages were, The Farragut class was 3.3 knots faster, the class had double the GM height. They had 25% more armament—5 main guns rather than 4—and about 35% greater firepower, All 8 torpedo tubes were on the preferred centerline position. The guns were fed by power hoist from the magazines, being high-freeboard vessels, sea-keeping was much improved over the flush deckers that preceded it. The radius of action increased by 450 nautical miles and this had all been accomplished on a displacement rise of only 22%. However, the Farragut-class destroyers were considered unstable in heavy weather and this was compounded by war-time modifications that made them even more top-heavy
8.
Destroyer
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Before World War II, destroyers were light vessels with little endurance for unattended ocean operations, typically a number of destroyers and a single destroyer tender operated together. After the war, the advent of the missile allowed destroyers to take on the surface combatant roles previously filled by battleships. This resulted in larger and more powerful guided missile destroyers more capable of independent operation, the emergence and development of the destroyer was related to the invention of the self-propelled torpedo in the 1860s. A navy now had the potential to destroy an enemy battle fleet using steam launches to launch torpedoes. Fast boats armed with torpedoes were built and called torpedo boats, the first seagoing vessel designed to fire the self-propelled Whitehead torpedo was the 33-ton HMS Lightning in 1876. She was armed with two drop collars to launch these weapons, these were replaced in 1879 by a torpedo tube in the bow. By the 1880s, the type had evolved into small ships of 50–100 tons, in response to this new threat, more heavily gunned picket boats called catchers were built which were used to escort the battle fleet at sea. The anti-torpedo boat origin of this type of ship is retained in its name in other languages, including French, Italian, Portuguese, Czech, Greek, Dutch and, up until the Second World War, Polish. At that time, and even into World War I, the function of destroyers was to protect their own battle fleet from enemy torpedo attacks. The task of escorting merchant convoys was still in the future, an important development came with the construction of HMS Swift in 1884, later redesignated TB81. This was a torpedo boat with four 47 mm quick-firing guns. At 23.75 knots, while still not fast enough to engage torpedo boats reliably. Another forerunner of the torpedo boat destroyer was the Japanese torpedo boat Kotaka, designed to Japanese specifications and ordered from the London Yarrow shipyards in 1885, she was transported in parts to Japan, where she was assembled and launched in 1887. The 165-foot long vessel was armed with four 1-pounder quick-firing guns and six torpedo tubes, reached 19 knots, in her trials in 1889, Kotaka demonstrated that she could exceed the role of coastal defense, and was capable of accompanying larger warships on the high seas. The Yarrow shipyards, builder of the parts for the Kotaka, the first vessel designed for the explicit purpose of hunting and destroying torpedo boats was the torpedo gunboat. Essentially very small cruisers, torpedo gunboats were equipped with torpedo tubes, by the end of the 1890s torpedo gunboats were made obsolete by their more successful contemporaries, the torpedo boat destroyers, which were much faster. The first example of this was HMS Rattlesnake, designed by Nathaniel Barnaby in 1885, the gunboat was armed with torpedoes and designed for hunting and destroying smaller torpedo boats. Exactly 200 feet long and 23 feet in beam, she displaced 550 tons, built of steel, Rattlesnake was un-armoured with the exception of a 3⁄4-inch protective deck
9.
Boiler
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A boiler is a closed vessel in which water or other fluid is heated. The fluid does not necessarily boil, the heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation. The pressure vessel of a boiler is usually made of steel, stainless steel, especially of the austenitic types, is not used in wetted parts of boilers due to corrosion and stress corrosion cracking. In live steam models, copper or brass is used because it is more easily fabricated in smaller size boilers. For much of the Victorian age of steam, the material used for boilermaking was the highest grade of wrought iron. In the 20th century, design practice instead moved towards the use of steel, which is stronger and cheaper, with welded construction, which is quicker and requires less labour. It should be noted, however, that wrought iron boilers corrode far slower than their steel counterparts. This makes the longevity of older wrought-iron boilers far superior to those of welded steel boilers, cast iron may be used for the heating vessel of domestic water heaters. Although such heaters are usually termed boilers in some countries, their purpose is usually to produce hot water, not steam, the brittleness of cast iron makes it impractical for high-pressure steam boilers. The source of heat for a boiler is combustion of any of several fuels, such as wood, coal, oil, electric steam boilers use resistance- or immersion-type heating elements. Nuclear fission is used as a heat source for generating steam, either directly or, in most cases. Heat recovery steam generators use the heat rejected from other such as gas turbine. 18th century Haycock boilers generally produced and stored large volumes of very low-pressure steam and these could burn wood or most often, coal. Flued boiler with one or two large flues—an early type or forerunner of fire-tube boiler, fire-tube boiler, Here, water partially fills a boiler barrel with a small volume left above to accommodate the steam. This is the type of boiler used in nearly all steam locomotives, the heat source is inside a furnace or firebox that has to be kept permanently surrounded by the water in order to maintain the temperature of the heating surface below the boiling point. Fire-tube boilers usually have a low rate of steam production. Fire-tube boilers mostly burn solid fuels, but are adaptable to those of the liquid or gas variety. Water-tube boiler, In this type, tubes filled with water are arranged inside a furnace in a number of possible configurations and this type generally gives high steam production rates, but less storage capacity than the above
10.
Gear
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A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source, Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape, two or more meshing gears, working in a sequence, are called a gear train or a transmission. A gear can mesh with a linear toothed part, called a rack, the gears in a transmission are analogous to the wheels in a crossed, belt pulley system. An advantage of gears is that the teeth of a gear prevent slippage, in transmissions with multiple gear ratios—such as bicycles, motorcycles, and cars—the term gear as in first gear refers to a gear ratio rather than an actual physical gear. The term describes similar devices, even when the ratio is continuous rather than discrete, or when the device does not actually contain gears. Early examples of gears date from the 4th century BC in China, examples of further development include, Ma Jun used gears as part of a south-pointing chariot. The Antikythera mechanism is an example of an early and intricate geared device. Its time of construction is now estimated between 150 and 100 BC, the water-powered grain-mill, the water-powered saw mill, fulling mill, and other applications of watermill often used gears. The first mechanical clocks were built in AD725, the 1386 Salisbury cathedral clock may be the worlds oldest working mechanical clock. The definite ratio that teeth give gears provides an advantage over other drives in precision machines such as watches that depend upon an exact velocity ratio, an external gear is one with the teeth formed on the outer surface of a cylinder or cone. Conversely, a gear is one with the teeth formed on the inner surface of a cylinder or cone. For bevel gears, a gear is one with the pitch angle exceeding 90 degrees. Internal gears do not cause output shaft direction reversal, spur gears or straight-cut gears are the simplest type of gear. They consist of a cylinder or disk with teeth projecting radially, though the teeth are not straight-sided, the edge of each tooth is straight and aligned parallel to the axis of rotation. These gears mesh together correctly only if fitted to parallel shafts, No axial thrust is created by the tooth loads. Spur gears are excellent at moderate speeds but tend to be noisy at high speeds, helical or dry fixed gears offer a refinement over spur gears. The leading edges of the teeth are not parallel to the axis of rotation, since the gear is curved, this angling makes the tooth shape a segment of a helix
11.
Steam turbine
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A steam turbine is a device that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Sir Charles Parsons in 1884, in 1551, Taqi al-Din in Ottoman Egypt described a steam turbine with the practical application of rotating a spit. Steam turbines were described by the Italian Giovanni Branca and John Wilkins in England. The devices described by Taqi al-Din and Wilkins are today known as steam jacks, in 1672 an impulse steam turbine driven car was designed by Ferdinand Verbiest. A more modern version of car was produced some time in the late 18th century by an unknown German mechanic. The modern steam turbine was invented in 1884 by Sir Charles Parsons, the invention of Parsons steam turbine made cheap and plentiful electricity possible and revolutionized marine transport and naval warfare. Parsons design was a reaction type and his patent was licensed and the turbine scaled-up shortly after by an American, George Westinghouse. The Parsons turbine also turned out to be easy to scale up. Parsons had the satisfaction of seeing his invention adopted for all major world power stations, a number of other variations of turbines have been developed that work effectively with steam. The de Laval turbine accelerated the steam to full speed before running it against a turbine blade, De Lavals impulse turbine is simpler, less expensive and does not need to be pressure-proof. It can operate with any pressure of steam, but is less efficient. He taught at the École des mines de Saint-Étienne for a decade until 1897, one of the founders of the modern theory of steam and gas turbines was Aurel Stodola, a Slovak physicist and engineer and professor at the Swiss Polytechnical Institute in Zurich. His work Die Dampfturbinen und ihre Aussichten als Wärmekraftmaschinen was published in Berlin in 1903, a further book Dampf und Gas-Turbinen was published in 1922. It was used in John Brown-engined merchant ships and warships, including liners, the present-day manufacturing industry for steam turbines is dominated by Chinese power equipment makers. Other manufacturers with minor market share include Bhel, Siemens, Alstom, GE, Doosan Škoda Power, Mitsubishi Heavy Industries, the consulting firm Frost & Sullivan projects that manufacturing of steam turbines will become more consolidated by 2020 as Chinese power manufacturers win increasing business outside of China. There are several classifications for modern steam turbines, Turbine blades are of two basic types, blades and nozzles. Blades move entirely due to the impact of steam on them and this results in a steam velocity drop and essentially no pressure drop as steam moves through the blades. A turbine composed of alternating with fixed nozzles is called an impulse turbine, Curtis turbine, Rateau turbine
12.
Nautical mile
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A nautical mile is a unit of measurement defined as exactly 1852 meters. Historically, it was defined as one minute of latitude, which is equivalent to one sixtieth of a degree of latitude. Today it is an SI derived unit, being rounded to a number of meters. The derived unit of speed is the knot, defined as one mile per hour. The geographical mile is the length of one minute of longitude along the Equator, there is no internationally agreed symbol. M is used as the abbreviation for the mile by the International Hydrographic Organization and by the International Bureau of Weights. NM is used by the International Civil Aviation Organization, nm is used by the U. S. National Oceanic and Atmospheric Administration. Nmi is used by the Institute of Electrical and Electronics Engineers, the word mile is from the Latin word for a thousand paces, mīlia. In 1617 the Dutch scientist Snell assessed the circumference of the Earth at 24,630 Roman miles, around that time British mathematician Edmund Gunter improved navigational tools including a new quadrant to determine latitude at sea. He reasoned that the lines of latitude could be used as the basis for a unit of measurement for distance, as one degree is 1/360 of a circle, one minute of arc is 1/21600 of a circle. These sexagesimal units originated in Babylonian astronomy, Gunter used Snells circumference to define a nautical mile as 6,080 feet, the length of one minute of arc at 48 degrees latitude.3 metres. Other countries measure the minute of arc at 45 degrees latitude, in 1929, the international nautical mile was defined by the First International Extraordinary Hydrographic Conference in Monaco as 1,852 meters. Imperial units and United States customary units used a definition of the nautical mile based on the Clarke Spheroid, the United States nautical mile was defined as 6,080.20 feet based in the Mendenhall Order foot of 1893. It was abandoned in favour of the nautical mile in 1954.181 meters. It was abandoned in 1970 and, legally, references to the unit are now converted to 1,853 meters. Conversion of units Orders of magnitude
13.
4"/50 caliber gun
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The 4/50 caliber gun was the standard low-angle, quick-firing gun for United States, first appearing on the monitor Arkansas and then used on Flush Deck destroyers through World War I and the 1920s. It was also the deck gun on S-class submarines, and was used to rearm numerous submarines built with 3-inch guns early in World War II. United States naval gun terminology indicates the gun fired a projectile 4-inch in diameter, and the barrel was 50 calibers long. The original 4-inch/50 caliber Mark 7 gun, M1898, serial nos. 213–254, 257–281, 316–338, was an entirely new high-power design built-up gun with a tube, jacket, hoop, locking ring, the ammunition was about 7 lb heavier than a 4-inch/40 caliber round. The Mod 1 was a Mod 0 that used a steel liner and the Mod 2 was either a Mod 0 or Mod 1 that was relined using a conical nickel-steel liner. Gun No.353 was the prototype of the Mark 8 and was test fired on 22 September 1910 and this gun had been ordered 16 June 1907 and delivered in November 1907. The simplified design of the Mark 8 had just a gun tube, the jacket extended all the way to the muzzle and ended in a muzzle bell. The production run was small with only 12 guns built, Nos. 353–364, the Mark 9 was a design directly resulting from tests with gun No.353. It was designed to be light in weight, and would go on to be the standard 4-inch gun used on destroyers, the gun would use an A tube, full-length jacket, a muzzle swell with a side swing Smith-Asbury breech mechanism and Welin breech block. The gun weighed about 2.725 short tons,365, the first Mark 9, was ordered from Midvale Steel on 18 October 1911. There were 390 Mark 9s built by four different manufacturers from 1911 until the US entered World War I in 1917, during the war another 1,885 guns were produced, with Root & VanDervoort, American Radiator Company and Poole Engineering joining the pre-war manufacturers. After the Armistice another 713 guns were produced, with orders for 3538 guns cancelled and it was decided after World War I that all destroyers would carry the 4-inch/50 caliber Mark 9 Mod 5 gun, the refits were completed in autumn 1921. 365-A, was order in 1915 but does not appear to have been completed until after WW I, the initial drawings were for a 4-inch/50 caliber anti-aircraft gun dated January and February 1915. Fixed ammunition with a 14. 5-pound charge of smokeless powder gave a 33-pound projectile a velocity of 2,900 ft/s, range was 9 mi at the maximum elevation of 20 degrees. Useful life expectancy was 400–500 effective full charges for a non-chrome plated barrel, increasing awareness of the need for improved anti-aircraft protection resulted in the mounting of dual purpose guns on destroyers beginning in the 1930s. The dual-purpose 5-inch/38 caliber gun became standard for United States destroyers constructed from the 1930s through World War II, United States destroyers built with 4-inch/50 caliber low-angle guns were mostly rearmed with dual-purpose 3-inch/50 caliber guns during the war. The 4-inch/50 caliber guns removed from destroyers were mounted on Defensively Equipped Merchant Ships of the British Merchant Navy, the unassigned numbers mostly corresponded to gun orders that were cancelled with the signing of the Armistice. They seem to have withdrawn in 1943 as other defenses were constructed
14.
3"/23 caliber gun
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The 3/23 caliber gun was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. Range was 10100 yards at 45 degrees elevation, ceiling was 18000 feet at the maximum elevation of 75 degrees. A partially retractable version was mounted as a gun on the US L-class, M-1, AA-1 class. Some major warships carried 3/23 caliber guns temporarily while awaiting installation of quad 1. 1/75 caliber guns, naval Weapons of World War Two. The Ships and Aircraft of the U. S. Fleet, british and Dominion Warships of World War II. DiGiulian, Tony Navweaps. com 3/23 caliber gun
15.
Anti-aircraft warfare
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Anti-aircraft warfare or counter-air defence is defined by NATO as all measures designed to nullify or reduce the effectiveness of hostile air action. They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and it may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be homeland defence, NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight, a surface-based air defence capability can also be deployed offensively to deny the use of airspace to an opponent. Until the 1950s, guns firing ballistic munitions ranging from 20 mm to 150 mm were the weapons, guided missiles then became dominant. The term air defence was probably first used by Britain when Air Defence of Great Britain was created as a Royal Air Force command in 1925. However, arrangements in the UK were also called anti-aircraft, abbreviated as AA, after the First World War it was sometimes prefixed by Light or Heavy to classify a type of gun or unit. Nicknames for anti-aircraft guns include AA, AAA or triple-A, an abbreviation of anti-aircraft artillery, ack-ack, NATO defines anti-aircraft warfare as measures taken to defend a maritime force against attacks by airborne weapons launched from aircraft, ships, submarines and land-based sites. In some armies the term All-Arms Air Defence is used for air defence by nonspecialist troops, other terms from the late 20th century include GBAD with related terms SHORAD and MANPADS. Anti-aircraft missiles are variously called surface-to-air missile, abbreviated and pronounced SAM, non-English terms for air defence include the German FlaK, whence English flak, and the Russian term Protivovozdushnaya oborona, a literal translation of anti-air defence, abbreviated as PVO. In Russian the AA systems are called zenitnye systems, in French, air defence is called DCA. The maximum distance at which a gun or missile can engage an aircraft is an important figure, however, many different definitions are used but unless the same definition is used, performance of different guns or missiles cannot be compared. For AA guns only the part of the trajectory can be usefully used. By the late 1930s the British definition was that height at which an approaching target at 400 mph can be engaged for 20 seconds before the gun reaches 70 degrees elevation. However, effective ceiling for heavy AA guns was affected by nonballistic factors, The maximum running time of the fuse, the capability of fire control instruments to determine target height at long range. The essence of air defence is to detect aircraft and destroy them. The critical issue is to hit a target moving in three-dimensional space, Air defence evolution covered the areas of sensors and technical fire control, weapons, and command and control. At the start of the 20th century these were very primitive or non-existent
16.
Torpedo tube
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A torpedo tube is a cylinder shaped device for launching torpedoes. There are two types of torpedo tube, underwater tubes fitted to submarines and some surface ships. Thus a submarine torpedo tube operates on the principle of an airlock, the diagram on the right illustrates the operation of a submarine torpedo tube. The diagram is somewhat simplified but does show the working of a torpedo launch. A torpedo tube has a number of interlocks for safety reasons. For example, an interlock prevents the door and muzzle door from opening at the same time. The submarine torpedo launch sequence is, in simplified form, Open the breech door in the torpedo room, load the torpedo into the tube. Hook up the connection and the torpedo power cable. Shut and lock the breech door, turn on power to the torpedo. A minimum amount of time is required for torpedo warmup, fire control programs are uploaded to the torpedo. This may be manually or automatically, from sea or from tanks. The tube must be vented during this process to allow for complete filling, Open the equalizing valve to equalize pressure in the tube with ambient sea pressure. If the tube is set up for Impulse Mode the slide valve will open with the muzzle door, if Swim Out Mode is selected, the slide valve remains closed. The slide valve allows water from the pump to enter the tube. Modern torpedoes have a safety mechanism that prevents activation of the torpedo unless the torpedo senses the required amount of G-force, the power cable is severed at launch. However, if a wire is used, it remains connected through a drum of wire in the tube. Torpedo propulsion systems vary but electric torpedoes swim out of the tube on their own and are of a smaller diameter,21 weapons with fuel-burning engines usually start outside of the tube. Once outside the tube the torpedo begins its run toward the target as programmed by the control system
17.
World War I
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World War I, also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history and it was one of the deadliest conflicts in history, and paved the way for major political changes, including revolutions in many of the nations involved. The war drew in all the worlds great powers, assembled in two opposing alliances, the Allies versus the Central Powers of Germany and Austria-Hungary. These alliances were reorganised and expanded as more nations entered the war, Italy, Japan, the trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary, by Yugoslav nationalist Gavrilo Princip in Sarajevo on 28 June 1914. This set off a crisis when Austria-Hungary delivered an ultimatum to the Kingdom of Serbia. Within weeks, the powers were at war and the conflict soon spread around the world. On 25 July Russia began mobilisation and on 28 July, the Austro-Hungarians declared war on Serbia, Germany presented an ultimatum to Russia to demobilise, and when this was refused, declared war on Russia on 1 August. Germany then invaded neutral Belgium and Luxembourg before moving towards France, after the German march on Paris was halted, what became known as the Western Front settled into a battle of attrition, with a trench line that changed little until 1917. On the Eastern Front, the Russian army was successful against the Austro-Hungarians, in November 1914, the Ottoman Empire joined the Central Powers, opening fronts in the Caucasus, Mesopotamia and the Sinai. In 1915, Italy joined the Allies and Bulgaria joined the Central Powers, Romania joined the Allies in 1916, after a stunning German offensive along the Western Front in the spring of 1918, the Allies rallied and drove back the Germans in a series of successful offensives. By the end of the war or soon after, the German Empire, Russian Empire, Austro-Hungarian Empire, national borders were redrawn, with several independent nations restored or created, and Germanys colonies were parceled out among the victors. During the Paris Peace Conference of 1919, the Big Four imposed their terms in a series of treaties, the League of Nations was formed with the aim of preventing any repetition of such a conflict. This effort failed, and economic depression, renewed nationalism, weakened successor states, and feelings of humiliation eventually contributed to World War II. From the time of its start until the approach of World War II, at the time, it was also sometimes called the war to end war or the war to end all wars due to its then-unparalleled scale and devastation. In Canada, Macleans magazine in October 1914 wrote, Some wars name themselves, during the interwar period, the war was most often called the World War and the Great War in English-speaking countries. Will become the first world war in the sense of the word. These began in 1815, with the Holy Alliance between Prussia, Russia, and Austria, when Germany was united in 1871, Prussia became part of the new German nation. Soon after, in October 1873, German Chancellor Otto von Bismarck negotiated the League of the Three Emperors between the monarchs of Austria-Hungary, Russia and Germany
18.
World War II
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World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan
19.
Huntington Ingalls Industries
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Huntington Ingalls Industries is an American Fortune 500 shipbuilding company formed on March 31,2011 as a spin-off of Northrop Grumman. Mike Petters is currently the president and CEO of Huntington Ingalls Industries, HII is the sole designer, builder, and refueler of nuclear-powered aircraft carriers in the United States. It is one of two nuclear-powered submarine builders,70 percent of the current, active US Navy fleet has been built by HIIs erstwhile units. The company takes its name from the founders of its two facilities, Collis Potter Huntington and Robert Ingalls.5 billion. HII is to build ten Gerald R. Ford-class aircraft carriers for the US Navy and it is scheduled to deliver one carrier every five years starting in 2015. The US Navy awarded HII a $2.4 billion fixed-price incentive contract for the design and construction of the amphibious assault ship America. Work will be performed primarily at the shipyard in Pascagoula, Miss. In June,2016 Huntington Ingalls Industries has been awarded a million contract to build the U. S. Navy’s newest amphibious assault warship. The total contract value for the construction of the third America-class ship is over $3 billion and this contract included planning, advanced engineering and procurement of long-lead material for the new vessel. In April 2011, the US Navy awarded HII a $1.5 billion contract for the construction of John P. Murtha and this was the first Navy contract awarded to HII, though Ingalls Shipbuilding had already built three ships of the class. The US Navy is building Virginia-class submarines as replacements for the Los Angeles-class submarines which are currently being phased out, HII and Electric Boat alternate work on the reactor plant, final assembly, test, outfit and delivery
20.
New York Shipbuilding Corporation
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At its peak during World War II, NYSB was the largest and most productive shipyard in the world. It was founded in 1899 by Henry G. Morse, a noted in connection with bridge design and construction. The original plan was to build a shipyard on Staten Island, site selection specifically considered the needs of the planned application of bridge building practices of prefabrication and assembly line production of ships in covered ways. Construction of the plant began in July 1899 and was so rapid that the keel of the first ship was laid November 1900. That ship, contract number 1, was M. S. Dollar, later to be modified as an oil tanker and renamed J. M. Guffey. Two of the first contracts were for ships that were among the largest then being built in the United States, #5 for Mongolia. Morse died after securing contracts for 20 ships and he was followed as president by De Coursey May. R. Grace & Company and the Pacific Mail Steamship Company, New York Ships unusual covered ways produced everything from aircraft carriers, battleships, and luxury liners to barges and car floats. During World War I, New York Ship expanded rapidly to fill orders from the U. S. Navy and the Emergency Fleet Corporation. A critical shortage of housing led to the construction of Yorkship Village. Yorkship Village is now the Fairview section of the City of Camden, after World War II, a much-diminished New York Ship subsisted on a trickle of contracts from the United States Maritime Administration and the U. S. Navy. The yard launched its last civilian vessel in 1960, and its last naval vessel, the companys final completed submarine was USS Guardfish, which had been ordered in the early 1960s, but construction was halted from 1963 to 1965 because of the loss of the USS Thresher. Guardfish was commissioned in December 1967, in 1968, lacking new naval orders, NYS went bankrupt. USS Pogy, then under construction, was towed to Ingalls Shipbuilding in Pascagoula, Mississippi, the yards site is now part of the Port of Camden, and handles breakbulk cargo. Ships built by New York Ship include, Oil tankers Gulflight launched 1914, center of a diplomatic incident when torpedoed in World War I
21.
William Cramp & Sons
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William Cramp & Sons Shipbuilding Company of Philadelphia was founded in 1830 by William Cramp, and was the preeminent U. S. iron shipbuilder of the late 19th century. In 1890 the company built the battleships USS Indiana and USS Massachusetts, armored cruiser USS New York, three of these ships took a part in the battle with the Spanish fleet in 1898 at Santiago de Cuba. In 1940, the Navy spent $22 million to reopen the yard as Cramp Shipbuilding to build cruisers, Cramp used the long slipways to construct two submarines at a time, with the intention of launching them simultaneously. However, the submarine construction program was not especially successful. The first delivery was made two years after laying, and fitting out was then done by Portsmouth Navy Yard. The best construction time for a submarine was 644 days, Cramp closed in 1947 and the site, on the Delaware River in Philadelphias Port Richmond neighborhood, became an industrial park. SS Valencia, an ocean liner built for the Red D Line in 1882. She was wrecked on the coastline of Vancouver Island, on January 22,1906, valencias loss is considered one of the worst shipwrecks in the region known as the Graveyard of the Pacific. USS New York, was launched on 2 December 1891 and became flagship of Admiral William T. Sampsons squadron during the Spanish–American War, USS Indiana, Battleship No.1 of the United States Navy, launched 28 February 1893. SS St. Louis and SS St. Paul —the first major ocean liners built in the United States after the collapse of the Collins Line in the 1850s, varyag contracted by Russian Imperial Admiralty, launched October 31,1899. The cruiser was sunk by the crew in Russo-Japanese War, salvaged by the Japanese, SS Evangeline, a coastal passenger liner built in 1927 for the Eastern Steamship Company. While operating as the cruise ship Yarmouth Castle in 1965, she caught fire, on 6 September 1941, the keel for the Cleveland-class light cruiser designated CL-90 was laid down by the Cramp Shipbuilding Company. On 6 March 1943, CL-90 USS Astoria was launched, on 8 December 1942, the keel to the Cleveland-class light cruiser designated CL-91, was laid down by the Cramp Shipbuilding Company. On 22 April 1943, Oklahomans were outraged, having just learned that the Japanese had executed the captured American pilots from Jimmy Doolittles bombing raid over Tokyo. That same day, booths were set up in Oklahoma City with the a goal to sell $40 million in War Bonds to fund the construction of a cruiser and that goal was topped by $5 million when the booths closed that night. CL-91 then became the USS Oklahoma City, the last ship Cramps built was the cruiser USS Galveston, launched on April 22,1945. SSW of Pensacola Pass, Pensacola, Florida Philadelphia Naval Shipyard Lewis Nixon and Arthur Leopold Busch, ships Built - Cramp Shipbuilding, Philadelphia
22.
Bethlehem Steel
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Bethlehem Steel Corporation was Americas second-largest steel producer and largest shipbuilder. Bethlehem Steel and a company, Bethlehem Shipbuilding Corporation, were two of the most powerful symbols of American industrial manufacturing leadership. In 2005, ISG merged with Mittal Steel, ending American ownership of the assets of Bethlehem Steel, the companys roots go back to 1857 when the Saucona Iron Company was first organized by Augustus Wolle. The Panic of 1857, a financial crisis, halted further organization of the company. Eventually, the organization was completed, the site moved elsewhere in South Bethlehem, on June 14,1860, the board of directors of the fledgling company elected Alfred Hunt president. On May 1,1861, the title was changed again. Construction of the first blast furnace began on July 1,1861, the first rolling mill was built between the spring of 1861 and the summer of 1863, with the first railroad rails being rolled on September 26. A machine shop, in 1865, and another blast furnace, during its early years, the company produced rails for the rapidly expanding railroads and armor plating for the US Navy. In 1899, the company assumed the name Bethlehem Steel Company, in 1904, Charles M. Schwab and Joseph Wharton formed the Bethlehem Steel Corporation with Schwab becoming its first president and chairman of its board of directors. The Bethlehem Steel Corporation installed the gray rolling mill and producing the first wide-flange structural shapes to be made in America and these shapes were partly responsible for ushering in the age of the skyscraper and establishing Bethlehem Steel as the leading supplier of steel to the construction industry. In the early 1900s, the corporation branched out from steel, with mines in Cuba. In 1913, it acquired the Fore River Shipbuilding Company of Quincy, Massachusetts, in 1917, it incorporated its shipbuilding division as Bethlehem Shipbuilding Corporation, Limited. In 1922, it purchased the Lackawanna Steel Company, which included the Delaware, Lackawanna, the nations decision to rebuild the United States Navy with steam-driven, steel-hulled warships reshaped Bethlehem Iron Companys destiny. Following the American Civil War, the Navy quickly downsized after the end of hostilities, as national energies were redirected toward settling the West, almost no new ordinance was produced, and new technology was neglected. By 1881, international incidents highlighted the poor condition of the U. S. fleet, in 1883, Secretary of the Navy William E. Chandler and Secretary of the Army Robert Todd Lincoln appointed Lt. William Jaques to the Gun Foundry Board. Jaques was sent on several fact-finding tours of European armament makers and on one of these trips he formed ties with the firm of Joseph Whitworth of Manchester. He returned to America as Whitworths agent and, in 1885, was granted a furlough to pursue this personal interest. Jaques was aware that the U. S. Navy would soon solicit bids for the production of heavy guns and other products such as armor that would be needed to further expand the fleet
23.
Mare Island Naval Shipyard
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The Mare Island Naval Shipyard was the first United States Navy base established on the Pacific Ocean. It is located 25 miles northeast of San Francisco in Vallejo, the Napa River goes through the Mare Island Strait and separates the peninsula shipyard from the main portion of the city of Vallejo. MINSY made a name for itself as the premier US West Coast submarine port as well as serving as the force in San Francisco Bay Area shipbuilding efforts during World War II. The base closed in 1996 and has gone through several redevelopment phases and it was registered as a California Historical Landmark in 1960, and parts of it were declared a National Historic Landmark District in 1975. They managed to survey the Mare Island Strait before steaming to Hawaii to obtain crewmen from Hawaiian monarch King Kamehameha III. They returned to San Francisco in the spring of 1850 with the survey of northern California beginning on April 4,1850. On August 1,1850, while still in Oregon, McArthur purchased a 1⁄16 interest in Mare Island for $468.50 then returned to San Francisco later that month to prepare charts, on January 15,1852, Secretary of the Navy Will A. Graham ordered a Naval Commission to select a site for a yard on the Pacific Coast. Commodore D. Sloat along with Commodore C, sanger were appointed to the commission. On July 13,1852, Sloat recommended the island across the Napa River from the settlement of Vallejo, the Navy purchased the original 956 acres of MINSY on January 4,1853. MINSY served as a major Pacific Ocean repair station during the late 19th century, handling American as well as Japanese, in 1861, the longest lived of the clipper ships, Syren, was brought to Mare Island Navy Yard for $15,000 of repairs. Syren had struck Mile Rock two times while trying to out of the Golden Gate. Marines first arrived for duty in 1862 under the command of Maj. Addison Garland, Mare Island Naval Shipyard also took a commanding role in civil defense and emergency response on the West Coast, dispatching warships to the Pacific Northwest to subdue Native American violence. MINSY sent ships such as Wyoming south to Central America and the Panama Canal to protect US political and commercial interests, some of the support, logistics and munition requirements for the Spanish–American War were filled by Mare Island. MINSY sent men, materiel and ships to San Francisco in response to the following the 1906 earthquake. Arctic rescue missions were mounted as necessary, ordnance manufacturing and storage were two further key missions at MINSY for nearly all of its active service, including ordnance used prior to the American Civil War. In 1911, the Marine Corps established two West Coast recruit training depots first at Mare Island, the second at Puget Sound, Mare Island eventually became the West Coasts only recruit training facility when the Puget Sound operation consolidated to the San Francisco Bay Area in 1912. Instructors trained recruits there until August 10,1923, when they relocated to the Marine Corps Recruit Depot San Diego, in March 1917 MINSY was the site of a major explosion of barges loaded with munitions
24.
Norfolk Naval Shipyard
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The Norfolk Naval Shipyard, often called the Norfolk Navy Yard and abbreviated as NNSY, is a U. S. Navy facility in Portsmouth, Virginia, for building, remodeling, and repairing the Navys ships. It is the oldest and largest industrial facility that belongs to the U. S. Navy as well as the most multifaceted, located on the Elizabeth River, the yard is just a short distance upriver from its mouth at Hampton Roads. It was established as Gosport Shipyard in 1767, destroyed during the American Revolutionary War, it was rebuilt and became home to the first operational drydock in the United States in the 1820s. Changing hands during the American Civil War, it served the Confederate States Navy until it was destroyed in 1862. The shipyard was again rebuilt, and has continued operation through the present day, the Gosport Shipyard was founded on November 1,1767 by Andrew Sprowle on the western shore of the Elizabeth River in Norfolk County in the Virginia Colony. This shipyard became a naval and merchant facility for the British Crown. In 1775, at the beginning of the American Revolution, Sprowle stayed loyal to the Crown and fled Virginia, in 1779, while the newly formed Commonwealth of Virginia was operating the shipyard, it was burned by British troops. In 1794, United States Congress passed An Act to Provide a Naval Armament, in 1799 the keel of USS Chesapeake, one of the first six frigates authorized by Congress, was laid, making her the first ship built in Gosport for the U. S. Navy. The federal government purchased the shipyard from Virginia in 1801 for $12,000 and this tract of land measured 16 acres and now makes up the northeastern corner of the current shipyard. In 1827, construction began on the first of what would be the first two dry docks in the United States. The first one was completed three weeks ahead of projects in both Boston, Massachusetts and South America, making it the first functional dry dock in the Americas. Dry Dock One, as it is referred to today, is operational and is listed as historical landmark in Portsmouth. Officers Quarters A, B, and C were built about 1837, additional land on the eastern side of the Elizabeth River was purchased in 1845. Enslaved Labor, slave labor was utilized in the Norfolk Navy Yard from its foundation until the Civil War. Some idea of the scale can be found in this exert from a letter of Commodore Lewis Warrington dated 12 October 1831 to the Navy Board of Commissioners. Warringtons letter to the BNC, was in response to various worker petitions. usgwarchives. net/va/portsmouth/shipyard/nnysharp. html#enslaved> In 1861, fearing that the Confederacy would take control of the facility, the shipyard commander Charles Stewart McCauley ordered the burning of the shipyard. The Confederate forces did in fact take over the shipyard, the capture of the shipyard allowed a tremendous amount of war material to fall into Confederate hands. 1,195 heavy guns were taken for the defense of the Confederacy, and employed in areas from Hampton Roads all the way to Fort Donelson Tennessee, Port Hudson
25.
Bath Iron Works
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Bath Iron Works is a major American shipyard located on the Kennebec River in Bath, Maine. Since its founding in 1884, BIW has built private, commercial and military vessels, the shipyard has built and sometimes designed battleships, frigates, cruisers and destroyers, including the Arleigh Burke class, which are currently among the worlds most advanced surface warships. Since 1995, Bath Iron Works has been a subsidiary of General Dynamics, during World War II, ships built at BIW were considered by sailors and Navy officials to be of superior toughness, giving rise to the phrase Bath-built is best-built. Bath Iron Works was incorporated in 1884 by General Thomas W. Hyde, after the war, Hyde bought a local shop that helped make windlasses and other iron hardware for the wooden ships built in Baths many shipyards. He expanded the business by improving its practices, entering new markets, by 1882, Hyde Windlass was eyeing the new and growing business of iron shipbuilding, two years later, it incorporated as Bath Iron Works. On February 28,1890, BIW won its first contract for complete vessels, the Machias, one of these 190-foot gunboats, was the first ship launched by the company. In 1892, the yard won its first commercial contract for a steel vessel, in the 1890s, the company built several yachts for wealthy sailors. In 1899, General Hyde, suffering from the Brights Disease that would kill him later that year, resigned from management of the shipyard, leaving his sons Edward and that year the shipyard began construction of the Georgia, the only battleship to be built in Bath. The ship dominated the yard for five years until its launching in 1904, the yard faced numerous challenges because of the weight of armor and weapons. In sea trials, the Georgia averaged 19.26 knots for four hours, making her the fastest ship in her class, the company continued to rely on Navy contracts, which provided 86% of the value of new contracts between 1905 and 1917. The yard also produced fishing trawlers, freighters, and yachts throughout the first half of the century, at peak production during World War II, the shipyard launched a destroyer every 17 days. Bath Iron Works ranked 50th among United States corporations in the value of World War II military production contracts, in 1981, Falcon Transport ordered two tankers, the last commercial vessels built by BIW. In 1988, the USS Samuel B, Roberts, commissioned two years earlier at Bath, survived a mine explosion that tore a hole in its engine room and flooded two compartments. Over the next two years, BIW repaired the Roberts in unique fashion, the guided missile frigate was towed to the companys dry dock in Portland, Maine, and put up on blocks, where its damaged engine room was cut out of the ship. Meanwhile, workers in Bath built a 315-ton replacement, when it was ready, the module was floated south to Portland, placed on the dry dock, slid into place under the Roberts, jacked up, and welded into place. In 2001, BIW wrapped up an effort to build an enormous concrete platform. Instead of being built on a way so that they could slide into the Kennebec at launch. This greatly reduced the work involved in building and launching the ships, the 750-foot,28, 000-ton dry dock was built by Chinas Jiangdu Yuchai Shipbuilding Company for $27 million
26.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
27.
Fletcher-class destroyer
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The Fletcher class was a class of destroyers built by the United States during World War II. The class was designed in 1939, as a result of dissatisfaction with the destroyer leader types of the Porter. Some went on to serve during the Korean War and into the Vietnam War, the United States Navy commissioned 175 Fletcher-class destroyers between 1942 and 1944, more than any other destroyer class, and the design was generally regarded as highly successful. Fletchers had a speed of 38 knots, and an armament of five 5 guns in single mounts with 1021 torpedoes in two quintuple centerline mounts. The Allen M. Sumner and Gearing classes were Fletcher derivatives, the long-range Fletcher-class ships performed every task asked of a destroyer, from anti-submarine warfare and anti-aircraft warfare to surface action. They could cover the vast distances required by fleet actions in the Pacific, in fact, they served almost exclusively in the Pacific Theater of Operations during World War II, during which they accounted for 29 Imperial Japanese Navy submarines sunk. Three have been preserved as museum ships in the U. S. the Fletcher class was the largest class of destroyer ordered, and was also one of the most successful and popular with the destroyer men themselves. Compared to earlier classes built for the Navy, they carried a significant increase in weapons and other weaponry. Their flush deck construction added structural strength, although it did make them rather cramped, the Fletcher-class was the first generation of destroyers designed after the series of Naval Treaties that had limited ship designs heretofore. The growth in the design was in part to answer a question that always dogged U. S. Navy designs, that being the long range required by operations in the Pacific Ocean. They were also to no less than five 5 in guns and ten deck-mounted torpedo tubes on the centerline. Compared to earlier designs, the Fletchers were large, allowing them to absorb the addition of two 40 mm Bofors quadruple mount AA guns as well as six 20 mm Oerlikon dual AA gun positions. This addition to the AA suite required the deletion of the forward quintuple torpedo mount, Fletchers were also much less top-heavy than previous classes, allowing them to take on additional equipment and weapons without major redesign. They were fortunate in catching American production at the moment, becoming the destroyer design, and only Fletcher-class derivatives. The first design inputs were in the fall of 1939 from questionnaires distributed around design bureaus, the design parameters were the armaments desired of the next destroyer. As such, the questions were of how many guns, torpedoes, also asked was at what point would the design grow large enough to become a torpedo target instead of a torpedo delivery system. As with other previous U. S. flush deck destroyer designs and this was mitigated by deployment to the Pacific Ocean, which is relatively calm. To achieve 38 kn with a 500-ton increase in displacement, shaft horsepower was increased from 50,000 to 60,000 compared to the previous Benson and Gleaves classes
28.
Knot (unit)
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The knot is a unit of speed equal to one nautical mile per hour, approximately 1.151 mph. The ISO Standard symbol for the knot is kn, the same symbol is preferred by the IEEE, kt is also common. The knot is a unit that is accepted for use with the SI. Etymologically, the term derives from counting the number of knots in the line that unspooled from the reel of a log in a specific time. 1 international knot =1 nautical mile per hour,1.852 kilometres per hour,0.514 metres per second,1.151 miles per hour,20.254 inches per second,1852 m is the length of the internationally agreed nautical mile. The US adopted the definition in 1954, having previously used the US nautical mile. The UK adopted the international nautical mile definition in 1970, having used the UK Admiralty nautical mile. The speeds of vessels relative to the fluids in which they travel are measured in knots, for consistency, the speeds of navigational fluids are also measured in knots. Thus, speed over the ground and rate of progress towards a distant point are given in knots. Until the mid-19th century, vessel speed at sea was measured using a chip log, the chip log was cast over the stern of the moving vessel and the line allowed to pay out. Knots placed at a distance of 8 fathoms -47 feet 3 inches from each other, passed through a sailors fingers, the knot count would be reported and used in the sailing masters dead reckoning and navigation. This method gives a value for the knot of 20.25 in/s, the difference from the modern definition is less than 0. 02%. On a chart of the North Atlantic, the scale varies by a factor of two from Florida to Greenland, a single graphic scale, of the sort on many maps, would therefore be useless on such a chart. Recent British Admiralty charts have a latitude scale down the middle to make this even easier, speed is sometimes incorrectly expressed as knots per hour, which is in fact a measure of acceleration. Prior to 1969, airworthiness standards for aircraft in the United States Federal Aviation Regulations specified that distances were to be in statute miles. In 1969, these standards were amended to specify that distances were to be in nautical miles. At 11000 m, an airspeed of 300 kn may correspond to a true airspeed of 500 kn in standard conditions. Beaufort scale Hull speed, which deals with theoretical estimates of maximum speed of displacement hulls Knot count Knotted cord Metre per second Orders of magnitude Rope Kemp
29.
Depth charge
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A depth charge is an anti-submarine warfare weapon. It is intended to destroy a submarine by being dropped into the nearby and detonating, subjecting the target to a powerful. Most depth charges use high explosive charges and a set to detonate the charge. Depth charges can be dropped by ships, patrol aircraft, Depth charges were developed during World War I, and were one of the first effective methods of attacking a submarine underwater. They were widely used in World War I and World War II and they remained part of the anti-submarine arsenals of many navies during the Cold War. Depth charges have now largely replaced by anti-submarine homing torpedoes. A depth charge fitted with a warhead is known as a nuclear depth bomb. These were designed to be dropped from a plane or deployed by an anti-submarine missile from a surface ship, or another submarine. All nuclear anti-submarine weapons were withdrawn from service by the United States, the United Kingdom, France, Russia and they were replaced by conventional weapons whose accuracy and range had improved greatly as ASW technology improved. The first attempt to fire charges against submerged targets was with aircraft bombs attached to lanyards which triggered them, a similar idea was a 16 lb guncotton charge in a lanyarded can. Two of these together became known as the depth charge Type A. Problems with the lanyards tangling and failing to function led to the development of a chemical pellet trigger as the Type B and these were effective at a distance of around 20 ft. A1913 Royal Navy Torpedo School report described a device intended for countermining, at Admiral John Jellicoes request, the standard Mark II mine was fitted with a hydrostatic pistol preset for 45 ft firing, to be launched from a stern platform. Weighing 1,150 lb, and effective at 100 ft, the design work was carried out by Herbert Taylor at the RN Torpedo and Mine School, HMS Vernon. The first effective depth charge, the Type D, became available in January 1916 and it was a barrel-like casing containing a high explosive. There were initially two sizes—Type D, with a 300 lb charge for fast ships, and Type D* with a 120 lb charge for ships too slow to leave the area before the more powerful charge detonated. A hydrostatic pistol actuated by water pressure at a pre-selected depth detonated the charge, initial depth settings were 40 or 80 ft. Because production could not keep up with demand, anti-submarine vessels initially carried two depth charges, to be released from a chute at the stern of the ship
30.
Destroyer escort
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Destroyer escort was the United States Navy mid-20th century classification for a 20-knot warship designed with endurance to escort mid-ocean convoys of merchant marine ships. Kaibōkan were designed for a role in the Imperial Japanese Navy. The Royal Navy and Commonwealth forces identified such warships as frigates, Destroyer escorts, frigates and kaibōkan were mass-produced for World War II as a less expensive anti-submarine warfare alternative to fleet destroyers. Post-war destroyer escorts and frigates were larger than those produced during wartime, with increased anti-aircraft capability, as Cold War destroyer escorts became as large as wartime destroyers, the United States Navy converted some of their World War II destroyers to escort destroyers. Full-size destroyers must be able to steam as fast or faster than the fast capital ships such as carriers and cruisers. This typically requires a speed of 25–35 knots and they must carry torpedoes and a smaller caliber of cannon to use against enemy ships, as well as anti-submarine detection equipment and weapons. A destroyer escort needed only to be able to maneuver relative to a slow convoy and these lower requirements greatly reduce the size, cost, and crew required for the destroyer escort. Destroyer escorts were optimized for anti-submarine warfare, having a turning radius. Their much slower speed was not a liability in this context, Destroyer escorts were also considerably more sea-kindly than corvettes. Electric drive was selected because it does not need gearboxes to adjust engine speed to the much lower optimum speed for the propellers, Destroyer escorts were also useful for coastal anti-submarine and radar picket ship duty. During World War II, seven destroyer escorts were converted to radar picket destroyer escorts, although these were relegated to secondary roles after the war, in the mid-1950s twelve more DEs were converted to DERs, serving as such until 1960-1965. Their mission was to extend the Distant Early Warning line on coasts, in conjunction with sixteen Guardian-class radar picket ships, which were converted Liberty ships. In World War II, some 95 destroyer escorts were converted by the US to high-speed transports and this involved adding an extra deck which allowed space for about 10 officers and 150 men. Two large davits were installed, one on either side of the ship. This enabled the UK to commission the US to design, build and supply an escort vessel that was suitable for anti-submarine warfare in deep open ocean situations, cochrane of the American Bureau of Shipping came up with a design which was known as the British Destroyer Escort. S. Navy and one to the Royal Navy, after World War II United States Navy destroyer escorts were referred to as ocean escorts, but retained the hull classification symbol DE. However other navies, most notably those of NATO countries and the USSR, in order to remedy this problem the 1975 ship reclassification reclassified ocean escorts as frigates. This brought the USNs nomenclature more in line with NATO, as of 2006 there are no plans for future frigates for the US Navy
31.
Fuel oil
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Fuel oil, is a fraction obtained from petroleum distillation, either as a distillate or a residue. In this sense, diesel is a type of fuel oil, Fuel oil is made of long hydrocarbon chains, particularly alkanes, cycloalkanes and aromatics. The term fuel oil is used in a stricter sense to refer only to the heaviest commercial fuel that can be obtained from crude oil, i. e. heavier than gasoline. In some countries, the fuel oil usually refers specifically to diesel fuel while in Australia. Although the following trends generally hold true, different organizations may have different numerical specifications for the six fuel grades, the boiling point and carbon chain length of the fuel increases with fuel oil number. Viscosity also increases with number, and the heaviest oil must be heated for it to flow, price usually decreases as the fuel number increases. Number 1 fuel oil is a distillate oil intended for vaporizing pot-type burners. It is the kerosene refinery cut that boils off immediately after the heavy naphtha cut used for gasoline, former names include, coal oil, stove oil and range oil. Number 2 fuel oil is a home heating oil. This fuel is known as Bunker A. Trucks and some cars use similar diesel fuel with a cetane number limit describing the quality of the fuel. Both are typically obtained from the gas oil cut. Gas oil refers to the use of this fraction in the late 19th. Number 3 fuel oil was an oil for burners requiring low-viscosity fuel. ASTM merged this grade into the number 2 specification, and the term has been used since the mid-20th century. Number 4 fuel oil is a heating oil for burner installations not equipped with preheaters. It may be obtained from the gas oil cut. Number 5 fuel oil is an industrial heating oil requiring preheating to 77–104 °C for proper atomization at the burners
32.
General Board of the United States Navy
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The General Board of the United States Navy was an advisory body of the United States Navy, somewhat akin to a naval general staff and somewhat not. The General Board was established by general order 544, issued on March 13,1900 by John Davis Long, the order was officially recognized by Congress in 1916. The General Board was disbanded in 1951, the war with Spain had underlined the need for adequate staff work and the success of the War Board had pointed the way for the future. Among the most persistent advocates of a staff for the Navy was Captain H. C. Taylor. He had first laid plans for such a staff before Roosevelt in May 1897, the board had two categories of members – the full time executive committee and ex officio members, senior officers holding specifics posts, who attended monthly board meetings. The ex officio members of the board included the President of the Naval War College, the director of intelligence. The general board was a version of the naval general staff proposed by a line officer. Originally consisting of nine officers, the membership of the board was changed frequently – in 1902 to 10, in 1904 to 14, in 1905 to seven, the board was headed by a chairman. George Dewey chaired the board from its inception until 1917, although a stroke in 1914 limited his abilities in the last three years of his tenure. The role that the General Board of the Navy played was the critical organizational dynamic in linking the treaty system and innovation in the fleet. In its beginning years, the General Board of the United States Navy was effectively a naval general staff, but started to lose its influence with the creation of the Chief of Naval Operations. During the latter years of its life – particularly since, the establishment of the Joint Chiefs of Staff, the board was inactivated by order of Chief of Naval Operations Forrest Sherman in April 1951 and abolished the following month
33.
Battleship
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A battleship is a large armored warship with a main battery consisting of large caliber guns. During the late 19th and early 20th centuries the battleship was the most powerful type of warship, the word battleship was coined around 1794 and is a contraction of the phrase line-of-battle ship, the dominant wooden warship during the Age of Sail. The term came into use in the late 1880s to describe a type of ironclad warship. In 1906, the commissioning of HMS Dreadnought heralded a revolution in battleship design, subsequent battleship designs, influenced by HMS Dreadnought, were referred to as dreadnoughts. Battleships were a symbol of naval dominance and national might, the launch of Dreadnought in 1906 commenced a new naval arms race. Jutland was the largest naval battle and the only full-scale clash of battleships in the war, the Naval Treaties of the 1920s and 1930s limited the number of battleships, though technical innovation in battleship design continued. The value of the battleship has been questioned, even during their heyday, there were few of the decisive fleet battles that battleship proponents expected, and used to justify the vast resources spent on building battlefleets. Battleships were retained by the United States Navy into the Cold War for fire support purposes before being stricken from the U. S. Naval Vessel Register in the 2000s. A ship of the line was a large, unarmored wooden sailing ship which mounted a battery of up to 120 smoothbore guns, from 1794, the alternative term line of battle ship was contracted to battle ship or battleship. The sheer number of guns fired broadside meant a sail battleship could wreck any wooden enemy, holing her hull, knocking down masts, wrecking her rigging, and killing her crew. However, the range of the guns was as little as a few hundred yards. The first major change to the ship of the concept was the introduction of steam power as an auxiliary propulsion system. Steam power was introduced to the navy in the first half of the 19th century, initially for small craft. The French Navy introduced steam to the line of battle with the 90-gun Napoléon in 1850—the first true steam battleship, Napoléon was armed as a conventional ship-of-the-line, but her steam engines could give her a speed of 12 knots, regardless of the wind condition. This was a decisive advantage in a naval engagement. The introduction of steam accelerated the growth in size of battleships, the adoption of steam power was only one of a number of technological advances which revolutionized warship design in the 19th century. The ship of the line was overtaken by the ironclad, powered by steam, protected by metal armor, and armed with guns firing high-explosive shells. In the Crimean War, six ships and two frigates of the Russian Black Sea Fleet destroyed seven Turkish frigates and three corvettes with explosive shells at the Battle of Sinop in 1853
34.
USS Lamson (DD-328)
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USS Lamson was a Clemson-class destroyer built for the United States Navy during World War I. The Clemson class was a repeat of the preceding Wickes class although more fuel capacity was added, the ships displaced 1,290 long tons at standard load and 1,389 long tons at deep load. They had a length of 314 feet 4 inches, a beam of 30 feet 11 inches. They had a crew of 6 officers and 108 enlisted men, performance differed radically between the ships of the class, often due to poor workmanship. The Clemson class was powered by two turbines, each driving one propeller shaft, using steam provided by four water-tube boilers. The turbines were designed to produce a total of 27,000 shaft horsepower intended to reach a speed of 35 knots, the ships carried a maximum of 371 long tons of fuel oil which was intended gave them a range of 2,500 nautical miles at 20 knots. The ships were armed with four 4-inch guns in single mounts and were fitted with two 1-pdr guns for anti-aircraft defense, in many ships a shortage of 1-pounders caused them to be replaced by 3-inch guns. Their primary weapon, though, was their torpedo battery of a dozen 21-inch torpedo tubes in four triple mounts and they also carried a pair of depth charge rails. A Y-gun depth charge thrower was added to many ships, after shakedown, Lamson was assigned to the Atlantic Fleet, arriving Charleston, South Carolina,28 December 1921. From 1921 to 1925, the destroyer operated along the east coast and in the Caribbean, participating in maneuvers, war games. Assigned to the U. S. Naval Forces in Europe, Lamson departed Boston, returning to the United States 1 year later, Lamson rejoined the Scouting Fleet and resumed exercises and maneuvers along the Atlantic coast and in the Caribbean. The destroyer continued operations until she decommissioned at Philadelphia 1 May 1930. Lamson was sold 17 January 1931 to Boston Iron & Metal Company, Baltimore, U. S. Destroyers, An Illustrated Design History. Gardiner, Robert & Gray, Randal, eds, conways All the Worlds Fighting Ships, 1906–1921. This article incorporates text from the public domain Dictionary of American Naval Fighting Ships, the entry can be found here
35.
Destroyers for Bases Agreement
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Generally referred to as the twelve hundred-ton type, the destroyers became the Town-class and were named after towns common to both the United States and Britain. The agreement was a violation of the neutral position of the United States. The Second World War started in September 1939, after the eight month interlude of the Phony War, France and the Low Countries were quickly overrun by the Nazi German Blitzkrieg in the Battle of France in May 1940. This left the United Kingdom and British Empire fighting alone, against Germany, although its government was sympathetic to Britains plight, American public opinion at the time overwhelmingly supported isolationism to avoid US involvement in another European war. Reflecting this sentiment, Congress had passed the Neutrality Acts three years previously, which banned the shipment or sale of arms from the US to any combatant nation. Additionally, President Franklin D. Roosevelt was further constrained by the upcoming 1940 Presidential election, British Prime Minister Winston Churchill initially rejected the offer on May 27 unless Britain received something immediate in return. But Roosevelt rejected Churchills pleas for destroyers for the Royal Navy, by August, while Britain and her Empire stood alone against Germany, the American Ambassador Joseph P. Kennedy reported from London that a British surrender was inevitable. On September 2,1940, as the Battle of Britain intensified, United States Secretary of State Cordell Hull signaled agreement to the transfer of the warships to the Royal Navy, both territories were vital to trans-Atlantic shipping, aviation, and to the Battle of the Atlantic. Although enemy attack on either was unlikely, it could not be discounted, the deal allowed Britain to hand much of the defence of Bermuda over to the still-neutral US, freeing British forces for redeployment to more active theatres. It also enabled the development of facilities at US expense which British forces would also utilise. The Royal Air Force and the Fleet Air Arm each maintained air stations in Bermuda at the start of the war, the airfield was named Kindley Field. RAF Transport Command relocated its operations to the airfield when it was completed in 1943, prior to this, the US Navy had established the Naval Operating Base at Bermudas West End. This was a boat station, from which maritime patrols were operated for the remainder of the war. The RAF and FAA facilities were closed after the war, leaving only the US air bases in Bermuda, the Naval Operating Base ceased to be an air station in 1965, when its flying boats were replaced by Neptune landplanes, operating from the Kindley Air Force Base. These US air bases were in only two of several US military facilities that operated in Bermuda during the Twentieth Century. The United States abandoned many of these bases in 1949 and the few were closed in 1995. The US does retain the right to military forces in Bermuda. Forty-three ships initially went to the British Royal Navy and seven to the Royal Canadian Navy, in the Commonwealth navies the ships were renamed after towns, and were therefore known as the Town class, although they had originally belonged to three ship classes
36.
Anti-submarine weapon
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An anti-submarine weapon is any one of a number of devices that are intended to act against a submarine and its crew, to destroy the vessel or reduce its capability as a weapon of war. In its simplest sense, a weapon is usually a projectile, missile or bomb that is optimized to destroy submarines. Prior to about 1890, naval weapons were used against surface shipping. With the rise of the submarine after this time, countermeasures were considered for use against them. The first submarine installation of tubes was in 1885 and the first ship was sunk by a submarine-launched torpedo in 1887. There were only two ways of countering the military initially, ramming them or sinking them with gunfire. However, once they were submerged, they were largely immune until they had to surface again, by the start of the First World War there were nearly 300 submarines in service with another 80 in production. World War I marked the first earnest conflict involving significant use of submarines, in particular, the United Kingdom was desperate to defeat the U-Boat threat against British merchant shipping. When the bombs that it employed were found to be ineffective it began equipping its destroyers with simple depth charges that could be dropped into the water around a suspected submarines location. During this period it was found that explosions of these charges were more efficient if the charges were set to explode below or above the submarine, however, many other techniques were used, including minefields, barrages and Q-ships and the use of cryptanalysis against intercepted radio messages. The airship was used to drop bombs but fixed-wing aircraft were used for reconnaissance. However, the most effective countermeasure was the convoy, in 1918 U-boat losses became unbearably high. Most of the losses were due to mines but two were torpedoed, french, Italian and Russian submarines were also destroyed. Before the war ended, the need for forward-throwing weapons had been recognized by the British, hydrophones had been developed and were becoming effective as detection and location devices. Also, aircraft and airships had flown with depth bombs, albeit small ones with poor explosives. In addition, the specialist hunter-killer submarine had appeared, HMS R-1, the main developments in this period were in detection, with both active sonar and radar becoming effective. The British integrated the sonar with fire control and weapons to form a system for warships. Germany was banned from having a fleet but began construction in secret during the 1930s
37.
Y-gun
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A depth charge is an anti-submarine warfare weapon. It is intended to destroy a submarine by being dropped into the nearby and detonating, subjecting the target to a powerful. Most depth charges use high explosive charges and a set to detonate the charge. Depth charges can be dropped by ships, patrol aircraft, Depth charges were developed during World War I, and were one of the first effective methods of attacking a submarine underwater. They were widely used in World War I and World War II and they remained part of the anti-submarine arsenals of many navies during the Cold War. Depth charges have now largely replaced by anti-submarine homing torpedoes. A depth charge fitted with a warhead is known as a nuclear depth bomb. These were designed to be dropped from a plane or deployed by an anti-submarine missile from a surface ship, or another submarine. All nuclear anti-submarine weapons were withdrawn from service by the United States, the United Kingdom, France, Russia and they were replaced by conventional weapons whose accuracy and range had improved greatly as ASW technology improved. The first attempt to fire charges against submerged targets was with aircraft bombs attached to lanyards which triggered them, a similar idea was a 16 lb guncotton charge in a lanyarded can. Two of these together became known as the depth charge Type A. Problems with the lanyards tangling and failing to function led to the development of a chemical pellet trigger as the Type B and these were effective at a distance of around 20 ft. A1913 Royal Navy Torpedo School report described a device intended for countermining, at Admiral John Jellicoes request, the standard Mark II mine was fitted with a hydrostatic pistol preset for 45 ft firing, to be launched from a stern platform. Weighing 1,150 lb, and effective at 100 ft, the design work was carried out by Herbert Taylor at the RN Torpedo and Mine School, HMS Vernon. The first effective depth charge, the Type D, became available in January 1916 and it was a barrel-like casing containing a high explosive. There were initially two sizes—Type D, with a 300 lb charge for fast ships, and Type D* with a 120 lb charge for ships too slow to leave the area before the more powerful charge detonated. A hydrostatic pistol actuated by water pressure at a pre-selected depth detonated the charge, initial depth settings were 40 or 80 ft. Because production could not keep up with demand, anti-submarine vessels initially carried two depth charges, to be released from a chute at the stern of the ship
38.
USS Hovey (DD-208)
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USS Hovey was a Clemson-class destroyer in the United States Navy during World War II. She was the ship named for Ensign Charles Hovey. She was one of only a few Clemson class destroyers armed with four twin Mk 14 4-inch guns and she sailed from Dalmatia, Italy 10 July 1920 for the Adriatic Sea to deliver important papers and claims. Arriving Constantinople 12 July she later visited various Russian ports as station ship until 17 December when she sailed for Port Said, Egypt, Hovey remained on the Asiatic station until she returned to San Francisco, California 2 October 1922, decommissioning at San Diego,1 February 1923. Hovey recommissioned 20 February 1930 at San Diego, California, Commander Stuart O. Greig in command. After shakedown out of San Diego and Mare Island she served principally as training ship for reservists until 9 April 1934 when she transited the Panama Canal, after training and fleet exercises out of New England and off the Florida coast, Hovey returned to San Diego 9 November. After overhaul at Mare Island, she resumed her operations along the West Coast with additional exercises and fleet problems in the Canal Zone, george Thomas Sullivan and Francis Henry Sullivan, two of the five Sullivan Brothers served aboard the Hovey. Hovey converted to a high speed minesweeper and was reclassified DMS-1119 November 1940, after intensive training she sailed 4 February 1941 for duty at Pearl Harbor. When the Japanese bombed Pearl Harbor 7 December 1941 Hovey was steaming in company with Chandler as antisubmarine screen for Minneapolis, the minesweeper immediately took up patrol and convoy duty around Pearl Harbor until 20 May when she escorted a 20-ship convoy to San Francisco, arriving 31 May. Hovey returned to Pearl Harbor in mid-June and sailed 10 July for the southwest Pacific escorting Argonne in company with Hovey and she reached the Fiji Islands 23 July and joined Minesweeping Group of Rear Admiral Richmond K. Turners South Pacific Amphibious Force the 31st. On 7 August, during the invasion of Guadalcanal, the first amphibious assault in the long island-hopping campaign, then, shortly before 0800, she took a bombardment station to cover the landings east of Gavutu. Japanese shore batteries opened up but were silenced by accurate fire from Hovey. She next joined other DMSs for sweeps between Gavutu and Bungana Islands, the next morning she steamed into Lengo Channel to help ward off an attack by a squadron of torpedo bombers. Intensive US anti-aircraft fire caused the Japanese planes to drop their torpedoes prematurely and hence at too great a range, Hovey continued her operations around Guadalcanal before retiring to New Caledonia 13 September for replenishment. From there she proceeded to Samoa before returning to Ndeni, Santa Cruz, returning to New Caledonia, Hovey departed 10 October with two PT boats in tow and 127 drums of aviation gasoline on board, which she delivered to Tulagi two days later. Hovey continued escort duty between Guadalcanal and Espiritu Santo, until she returned to San Francisco 19 April 1943 for overhaul and she joined a convoy out of Mare Island 31 May for New Caledonia, arriving 10 August. She then resumed her escort and patrol duties until 30 October when she joined Rear Admiral Theodore S. Wilkinsons III Amphibious Force for the Cape Torokina landing,1 November 1943. For the next week during the seizure of Empress Augusta Bay, Hovey operated with the forces, screening transports
39.
USS Long
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USS Long, named for John Davis Long, Secretary of the Navy from 1897 to 1902, was a Clemson-class destroyer in the United States Navy. Long was laid down by the William Cramp and Sons at Philadelphia on 23 September 1918, launched on 26 April 1919 by Mrs. Arnold Knapp and commissioned on 20 October 1919, after shakedown along the Atlantic coast, Long sailed late in the year for the Mediterranean. Assigned to Destroyer Division 26, she patrolled the Adriatic and Mediterranean, based at Cavite, Luzon, she patrolled the South China Sea until July 1922 when she was ordered to the United States. Long decommissioned at San Diego, California,30 December 1922, Long recommissioned at San Diego 29 March 1930, Lieutenant Commander William J. Butler in command. Operating out of San Diego during the decade, Long cruised primarily in the Pacific off North and Central America for division exercises and screen. Between 1933 and 1935 she twice entered the rotating Reserve as part of Destroyer Squadron 20, in 1940, she was converted to destroyer minesweeper, and reclassified DMS-12 on 19 November 1940. Long operated along the west coast and in Hawaiian waters with Mine Squadron 2, on 5 December 1941, she departed Pearl Harbor in the screen for Indianapolis. Following the Japanese attack on Pearl Harbor 2 days later, she returned there 9 December and she also escorted ships among the Hawaiian Islands and between March and June 1942, made escort runs to Midway, Palmyra, and Canton. During the Arctic winter she patrolled the approaches to Adak and guarded convoys as American forces sought to defeat Japanese garrisons in the western Aleutians. Long took part in the occupation of Amchitka 12 January 1943. Thence, she joined Rear Admiral Francis W. Rockwells TF51 on 3 May for the Invasion of Attu. Steaming through the heavy spring seas and blanketing fog of the Bering Sea, she closed Attu 11 May and swept for mines prior to the successful landings later that day. After patrol in Hawaiian waters 15 November to 22 January 1944, she escorted reinforcements to Roi and Namur in the Marshalls 2 February, then joined TF76 on 28 February in New Guinea waters. She served as escort and swept mines in the conquest of the Admiralties early in March, then escorted convoys to and from Milne Bay, Guadalcanal, and Espiritu Santo from Cape Sudest. On 18 April, Long sailed for the invasion of the Hollandia area, she entered Humboldt Bay 22 April, made an exploratory sweep, Long arrived at Guadalcanal early in May to prepare for the Marianas assault, for which she sailed 4 June. After antisubmarine and convoy duty, Long joined TG32.5 at Guadalcanal 16 August. Leaving Seeadler Harbor 10 October with Minesweeping Unit 1, Long entered Leyte Gulf the 17th, spearheading the invasion, she cleared mines off Dinagat and Hibuson Islands, and in the Dulag-Tacloban approach channel. After sweeping Surigao Strait, she patrolled and served as smokescreen ship in Leyte Gulf until 23 October, Long began mine sweeps in Lingayen Gulf 6 January, evading and firing upon Japanese aircraft as she carried out her intricate mission
40.
5"/51 caliber gun
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5/51 caliber guns initially served as the secondary battery of United States Navy battleships built from 1907 through the 1920s, also serving on other vessels. United States naval gun terminology indicates the gun fired a projectile 5-inch in diameter, the different marks of the gun were Marks 7,8,9,14, and 15. The built-up gun consisted of a tube, full-length jacket, and single hoop with side swing Welin breech block, some Marks included a tapered liner. A24.5 lb charge of smokeless powder gave a 50-pound projectile a velocity of 3,150 ft/s, range was 15,850 yards at the maximum elevation of 20 degrees. Useful life expectancy was 900 effective full charges per liner, the 5-inch/51 caliber gun was designed to engage destroyers, torpedo boats, and other surface targets. It entered service in 1911 as secondary armament on the Florida-class battleships, most of the remaining guns were moved to redesigned casemates during the 1927–1930 refits. A1939 Table of Organization and Equipment shows Marine defense battalions were equipped with six of these guns each, 5-inch/51 shore batteries were used with great effectiveness by the 1st Marine Defense Battalion during the Battle of Wake Island in December 1941. These were eventually replaced in the defense battalions by the 155 mm Long Tom gun, six Tambor-class submarines were rearmed with wet mount 5-inch/51 guns during World War II, taken from Barracuda-class submarines or spares for that class. This list may not be exhaustive and they were grouped into two-gun batteries unless otherwise noted. During World War I three of these formed part of the coastal defences of Scapa Flow. In World War II a small number of these guns entered British service on ships transferred under the Lend-Lease arrangement. Some of these guns were transferred to New Zealand and deployed ashore for coastal defence. S. Jack, Roberts, Stephen S. Register of Ships of the U. S. Navy, 1775-1990, american Seacoast Defenses, A Reference Guide, Third Edition. Naval Weapons of World War Two, the Ships and Aircraft of the U. S. Fleet. The Ships and Aircraft of the U. S. Fleet, naval Weapons of World War One. List of all US coastal forts and batteries at the Coast Defense Study Group, Inc. website FortWiki, lists most CONUS and Canadian forts
41.
Honda Point disaster
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The Honda Point disaster was the largest peacetime loss of U. S. Navy ships. Two other ships grounded, but were able to free of the rocks. Twenty-three sailors died in the disaster, the area of Honda Point is extremely treacherous for central California mariners, as it features a series of rocky outcroppings, collectively known as Woodbury Rocks by locals. Called the Devils Jaw, the area has been a hazard since the Spanish explorers first came in the 16th century. It is just north of the entrance to the Santa Barbara Channel, Captain Edward H. Watson, an 1895 graduate of the United States Naval Academy, commanded Destroyer Squadron Eleven. He had served during the Spanish–American War, the Philippine Insurrection, Watson was promoted to captain in 1917. Assigned command of Destroyer Squadron Eleven in July 1922, it was his first time as a fleet commander, the fourteen ships of Destroyer Squadron 11 were steaming south from San Francisco Bay to San Diego Bay in the late summer of 1923. The squadron was led by Commodore Edward H. Watson, on the flagship destroyer USS Delphy, all were Clemson-class destroyers, less than five years old. The ships turned east to course 095, supposedly heading into the Santa Barbara Channel, the ships were navigating by dead reckoning, estimating positions from their course and speed, as measured by propeller revolutions per minute. At that time radio navigation aids were new and not completely trusted, the USS Delphy was equipped with a radio navigation receiver, but her navigator and captain ignored its indicated bearings, believing them to be erroneous. No effort was made to take soundings of water due to the necessity of slowing the ships down to take the measurements. The ships were performing an exercise that simulated wartime conditions, hence the decision was not to slow down. In this case, the reckoning was wrong, and the mistakes were fatal. Despite the heavy fog, Commodore Watson ordered all ships to travel in close formation and, turning too soon, two ships whose captains disobeyed the close-formation order survived, although they also hit the rocks. Earlier the same day, the mail steamship SS Cuba ran aground nearby, some attributed these incidents in the Santa Barbara Channel to unusual currents caused by the great Tokyo earthquake of the previous week. Destroyer Squadron Eleven was on an exercise from northern California to southern California. The flagship was responsible for navigation, as the USS Delphy steamed along the coastline, poor visibility meant the navigators had to go by the age-old technique of dead reckoning. They had to estimate their position based on their speed and heading, based solely on dead reckoning, Captain Watson ordered the fleet to turn east into the Santa Barbara Channel
42.
London Naval Treaty
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Ratifications were exchanged in London on October 27,1930, and the treaty went into effect on the same day. It was registered in League of Nations Treaty Series on February 6,1931, the terms of the treaty were seen as an extension of the conditions agreed in the Washington Naval Treaty. That treaty had been an effort to prevent an arms race after World War I. The Conference was a revival of the efforts which had gone into the Geneva Naval Conference of 1927, at Geneva, the various negotiators had been unable to reach agreement because of bad feeling between the British Government and that of the United States. Submarine gun caliber was also restricted for the first time to 6.1 inches with one exception and this put an end to the big-gun submarine concept pioneered by the British M class and the French Surcouf. The Treaty also established a distinction between cruisers armed with no greater than 6.1 inches from those with guns up to 8 inches. The number of cruisers was limited – Britain was permitted 15 with a total tonnage of 147,000, the U. S.18 totalling 180,000. For light cruisers, no numbers were specified but tonnage limits were 143,500 tons for the U. S.192,200 tons for the British, and 100,450 tons for the Japanese. Destroyer tonnage was also limited, with destroyers being defined as ships of less than 1,850 tons and guns not exceeding 5.1 inches, the Americans and British were permitted up to 150,000 tons and Japan 105,500 tons. Article 22 relating to submarine warfare declared international law applied to them as to surface vessels, also merchant vessels which demonstrated persistent refusal to stop or active resistance could be sunk without the ships crew and passengers being first delivered to a place of safety. Active negotiations amongst the other treaty signatories continued during the following years and this was followed by the Second London Naval Treaty of 1936. Treaty for the Limitation of Naval Armament Second London Naval Treaty – List of treaties signed in London, Treaty of London – List of treaties signed in London. May 15 Incident - attempted coup in Japan Steiner, Zara S, the Lights that Failed, European International History 1919–1933. ISBN 978-0-19-822114-2, OCLC58853793 Text of the treaty
43.
Yarrow boiler
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Yarrow boilers are an important class of high-pressure water-tube boilers. They were developed by Yarrow & Co, shipbuilders and Engineers and were widely used on ships, particularly warships. The Yarrow boiler design is characteristic of the boiler, two banks of straight water-tubes are arranged in a triangular row with a single furnace between them. A single steam drum is mounted at the top between them, with water drums at the base of each bank. Circulation, both upwards and downwards, occurs within this same tube bank, the Yarrows distinctive features were the use of straight tubes and also circulation in both directions taking place entirely within the tube bank, rather than using external downcomers. Early use of the water-tube boiler within the Royal Navy was controversial at times and these first boilers, such as the Belleville and Niclausse, were large-tube designs, with simple straight tubes of around 4 diameter, at a shallow angle to the horizontal. These tubes were jointed into cast iron headers and gave much trouble with leakage at these joints, at the time, an assumption was that thermal expansion in these straight tubes was straining the joints. These boilers were also large, and although fitted to many pre-dreadnought battleships, could not be fitted to the torpedo boats. To provide a lighter boiler for smaller vessels, the Express types were developed and these used smaller water-tubes of around 2 diameter, giving a greater ratio of heating area to volume. Most of these were of the pattern, particularly of the Du Temple. This gave a more vertical arrangement of the water-tubes, thus encouraging thermosyphon circulation in these narrow tubes. The previous problems of tube expansion were still a concern and so the tubes were either curved, or even convoluted into hairpins and S shapes. Alfred Yarrow developed his boiler as a response to others that had already developed water-tube boilers and this was a long process based on theoretical experiment rather than evolution of practical boilers. Work began in 1877 and the first commercial boiler was not supplied until 10 years later, despite this long gestation, the boilers origins appear to have been most direct. Already expressed two of the three basic design principles. Early water-tube designers had been concerned with the expansion of the tubes when heated. Efforts were made to them to expand freely, particularly so that those closest to the furnace might expand relatively more than those further away. Typically this was done by arranging the tubes in large looping curves and these had difficulties in manufacturing and required support in use
44.
Destroyer minelayer
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Before World War II, destroyers were light vessels with little endurance for unattended ocean operations, typically a number of destroyers and a single destroyer tender operated together. After the war, the advent of the missile allowed destroyers to take on the surface combatant roles previously filled by battleships. This resulted in larger and more powerful guided missile destroyers more capable of independent operation, the emergence and development of the destroyer was related to the invention of the self-propelled torpedo in the 1860s. A navy now had the potential to destroy an enemy battle fleet using steam launches to launch torpedoes. Fast boats armed with torpedoes were built and called torpedo boats, the first seagoing vessel designed to fire the self-propelled Whitehead torpedo was the 33-ton HMS Lightning in 1876. She was armed with two drop collars to launch these weapons, these were replaced in 1879 by a torpedo tube in the bow. By the 1880s, the type had evolved into small ships of 50–100 tons, in response to this new threat, more heavily gunned picket boats called catchers were built which were used to escort the battle fleet at sea. The anti-torpedo boat origin of this type of ship is retained in its name in other languages, including French, Italian, Portuguese, Czech, Greek, Dutch and, up until the Second World War, Polish. At that time, and even into World War I, the function of destroyers was to protect their own battle fleet from enemy torpedo attacks. The task of escorting merchant convoys was still in the future, an important development came with the construction of HMS Swift in 1884, later redesignated TB81. This was a torpedo boat with four 47 mm quick-firing guns. At 23.75 knots, while still not fast enough to engage torpedo boats reliably. Another forerunner of the torpedo boat destroyer was the Japanese torpedo boat Kotaka, designed to Japanese specifications and ordered from the London Yarrow shipyards in 1885, she was transported in parts to Japan, where she was assembled and launched in 1887. The 165-foot long vessel was armed with four 1-pounder quick-firing guns and six torpedo tubes, reached 19 knots, in her trials in 1889, Kotaka demonstrated that she could exceed the role of coastal defense, and was capable of accompanying larger warships on the high seas. The Yarrow shipyards, builder of the parts for the Kotaka, the first vessel designed for the explicit purpose of hunting and destroying torpedo boats was the torpedo gunboat. Essentially very small cruisers, torpedo gunboats were equipped with torpedo tubes, by the end of the 1890s torpedo gunboats were made obsolete by their more successful contemporaries, the torpedo boat destroyers, which were much faster. The first example of this was HMS Rattlesnake, designed by Nathaniel Barnaby in 1885, the gunboat was armed with torpedoes and designed for hunting and destroying smaller torpedo boats. Exactly 200 feet long and 23 feet in beam, she displaced 550 tons, built of steel, Rattlesnake was un-armoured with the exception of a 3⁄4-inch protective deck
45.
Town-class destroyer
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They were known as four-pipers or four-stackers because they had four smokestacks. Later classes of destroyers typically had one or two, some went to the Royal Canadian Navy at the outset. Others went on to the Royal Norwegian Navy, the Royal Netherlands Navy, although given a set of names by the Commonwealth navies that suggested they were one class they actually came from three classes of destroyer, Caldwell, Wickes, and Clemson. Town class refers to the Admiralty renaming these ships after towns common to the United States, ships initially commissioned into the Royal Canadian Navy, however, followed the Canadian practice of giving destroyers the names of Canadian rivers. One of the Towns achieved lasting fame, HMS Campbeltown, in the Commando raid Operation Chariot, Campbeltown, fitted with a large demolition charge, rammed the Normandie Lock at Saint-Nazaire, France. The charge detonated on 29 March 1942, breaching the drydock and destroying Campbeltown and this exploit was depicted in the 1950 Trevor Howard film The Gift Horse, which starred HMS Leamington after her return from service in Russia. Roughly contemporaneous to the British V and W-class destroyers they were not much liked by their new crews and they were uncomfortable and wet, working badly in a seaway. Their hull lines were narrow and herring-gutted which gave them a vicious roll. The officers didnt like the way they handled either, since they had built with propellers that turned the same way. They also had fully enclosed bridges which caused problems with reflections in the glass at night, the original armament was four 4-inch guns, one 3-inch anti-aircraft gun, and twelve torpedo tubes. On the Wickes class, the 4-inch gun placement was one gun in a shield on the forecastle, one on the quarterdeck, the Admiralty promptly removed one of the 4-inch guns and six torpedo tubes to improve stability. Twenty-three of the class had further armament reductions for anti-submarine escort of trade convoys, Two of the remaining 4-inch guns and three of the remaining torpedo tubes were removed to allow increased depth charge stowage and installation of Hedgehog anti-submarine mortar system. USS Conner became HMS Leeds on 23 October 1940 and she was scrapped on 19 January 1949. USS Conway became HMS Lewes on 23 October 1940 and she outlived all of her sisters in British service and was stripped of valuable scrap and scuttled off Sydney, Australia on 25 May 1946. USS Stockton became HMS Ludlow on 23 October 1940, stripped and beached as a target for rocket firing aircraft off Fidra Island, USS Aaron Ward became HMS Castleton on 9 September 1940. She was scrapped on 2 January 1948, USS Abbot became HMS Charlestown on 23 September 1940. She was scrapped on 3 December 1948, USS Buchanan became HMS Campbeltown on 9 September 1940. She was destroyed in Operation Chariot on 29 March 1942, USS Claxton became HMS Salisbury on 5 December 1940, she was employed as a special escort for specific convoys, including escorting Wasp during the supply of Spitfires to Malta
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