1.
Murmansk
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The city is named for the Murman Coast, Murman is itself an older Russian term for Norwegians. Although Murmansks population is in decline—299,148,307, 257 ,336, 137 ,468, Murmansk was the last city founded in the Russian Empire. On June 29,1916, Russian Transport Minister Alexander Trepov petitioned to grant urban status to the railway settlement, on July 6,1916, the petition was approved and the town was named Romanov-on-Murman, after the imperial Russian dynasty of Romanovs. On September 21,1916, the ceremony was performed. After the February Revolution of 1917, on April 3,1917, in the winter of 1917 the British North Russia Squadron under Rear Admiral Thomas Kemp was established at Murmansk. From 1918 to 1920, during the Russian Civil War, the town was occupied by the Western powers, who had allied in World War I. On February 13,1926, local self-government was organized in Murmansk for the first time, during a session of the Murmansk City Soviet. Prior to this, the city was governed by the authorities of Alexandrovsky Uyezd, while this plan was not confirmed by the Leningrad Oblast Executive Committee, in 1935–1937 several rural localities of Kolsky and Polyarny Districts were merged into Murmansk anyway. According to the Presidium of the Leningrad Oblast Executive Committee resolution of February 26,1935, however, the provisions of the resolution were not fully implemented, and due to military construction in Polyarnoye, the administrative center was instead moved to Murmansk in the beginning of 1935. In addition to being the center of Murmansk Okrug, Murmansk also continued to serve as the administrative center of Polyarny District until September 11,1938. This status was retained when Murmansk Okrug was transformed into Murmansk Oblast on May 28,1938, the supplies were brought to the city in the Arctic convoys. For the rest of the war, Murmansk served as a point for weapons. This unyielding, stoic resistance was commemorated at the 40th anniversary of the victory over the Germans in the designation of Murmansk as a Hero City on May 6,1985. During the Cold War Murmansk was a center of Soviet submarine, after the dissolution of the Soviet Union, the nearby city and naval base of Severomorsk remains the headquarters of the Russian Northern Fleet. In 1974, a massive 35. 5-meter tall statue Alyosha, in 1984, the Hotel Arctic, now known as Azimut Hotel Murmansk, opened and became the tallest building above the Arctic Circle. Within the framework of administrative divisions, it is incorporated as the City of Murmansk—an administrative unit with the equal to that of the districts. As a municipal division, the City of Murmansk is incorporated as Murmansk Urban Okrug and they were abolished on June 2,1948. The same city districts were created for the time on June 23,1951
2.
Russia
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Russia, also officially the Russian Federation, is a country in Eurasia. The European western part of the country is more populated and urbanised than the eastern. Russias capital Moscow is one of the largest cities in the world, other urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a range of environments. It shares maritime borders with Japan by the Sea of Okhotsk, the East Slavs emerged as a recognizable group in Europe between the 3rd and 8th centuries AD. Founded and ruled by a Varangian warrior elite and their descendants, in 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus ultimately disintegrated into a number of states, most of the Rus lands were overrun by the Mongol invasion. The Soviet Union played a role in the Allied victory in World War II. The Soviet era saw some of the most significant technological achievements of the 20th century, including the worlds first human-made satellite and the launching of the first humans in space. By the end of 1990, the Soviet Union had the second largest economy, largest standing military in the world. It is governed as a federal semi-presidential republic, the Russian economy ranks as the twelfth largest by nominal GDP and sixth largest by purchasing power parity in 2015. Russias extensive mineral and energy resources are the largest such reserves in the world, making it one of the producers of oil. The country is one of the five recognized nuclear weapons states and possesses the largest stockpile of weapons of mass destruction, Russia is a great power as well as a regional power and has been characterised as a potential superpower. The name Russia is derived from Rus, a state populated mostly by the East Slavs. However, this name became more prominent in the later history, and the country typically was called by its inhabitants Русская Земля. In order to distinguish this state from other states derived from it, it is denoted as Kievan Rus by modern historiography, an old Latin version of the name Rus was Ruthenia, mostly applied to the western and southern regions of Rus that were adjacent to Catholic Europe. The current name of the country, Россия, comes from the Byzantine Greek designation of the Kievan Rus, the standard way to refer to citizens of Russia is Russians in English and rossiyane in Russian. There are two Russian words which are translated into English as Russians
3.
Arktika-class icebreaker
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The Arktika class is a Russian class of nuclear-powered icebreakers. Formerly known as Project 10520 nuclear-powered icebreaker, they were the largest and most powerful icebreakers until 2016, of the ten civilian nuclear-powered vessels built by Russia, six have been of this type. They are used for escorting merchant ships in the Arctic Ocean north of Siberia as well as for scientific, on July 3,1971, construction began on a conceptual design of a larger nuclear icebreaker, dubbed Arktika, in the Baltic Shipyard in then Leningrad. Four years later, on December 17,1975, Moscow, the newest and largest nuclear icebreaker at the time was ready for the Arctic. Arktika was the first surface ship to reach the North Pole, a new class of nuclear icebreakers, also called Arktika, was launched in 2016 in anticipation of decreasing ice and increased traffic. The Arktika is an icebreaker, the outer hull is 48 mm thick. At the strongest point, the cast steel prow is 50 cm thick and bow-shaped to aid in icebreaking, the maximum ice thickness it can break through is approximately 5 meters. Like many icebreakers, Arktika also has an Air Bubbling System which delivers 24 m3/s of steam from jets 9 m below the surface to aid in the breakup of ice. The ship is divided by eight bulkheads, providing nine watertight compartments in the event of disaster and it also comes equipped with a helicopter pad and hangar at the aft of the ship. Arktika and the entire Arktika-class icebreaker fleet are outfitted with two OK-900A reactors, which deliver 171 MW each, each reactor is contained in its own closed compartment and weighs 160 tonnes. They are shielded by water, steel, and high density concrete, the reactors were originally fueled by a 90% enriched, zirconium-clad, uranium fuel. Those reactors still in operation today now use a 20%-90% enriched with 60% average enrichment uranium dispersed in an aluminum matrix, the chain reaction can be stopped in 0.6 seconds by the full insertion of safety rods. Arktika consumes up to 200 grams of fuel a day when breaking ice, there are 500 kg of Uranium isotopes in each reactor, allowing for at least 13.7 years between changing reactor cores. The used cores are extracted and replaced in Murmansk, the spent fuel reprocessed, both the OK-150 and OK-900 are pressurized water reactors, meaning that cooling water is continually pumped under pressure through the reactor to remove heat, keeping the cores and the reactor cool. The heated water is pumped from the reactor to a boiler, each set of four boilers drives two steam turbines, which turn three dynamos. One kilovolt of direct current is delivered to three double-wound motors directly connected to the propeller, providing an average screw velocity of 120-180 rpm. Five auxiliary steam turbines are tied into the plant to provide electricity, three fixed-pitch propellers provide Arktika with its thrust, power, and maneuverability. The starboard and centerline propellers turn clockwise while the port turns counter clockwise to compensate
4.
Icebreaker
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An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term refers to ice-breaking ships, it may also refer to smaller vessels. For a ship to be considered an icebreaker, it requires three traits most normal ships lack, a hull, an ice-clearing shape, and the power to push through sea ice. Icebreakers clear paths by pushing straight into ice pockets, the bending strength of sea ice is so low that usually the ice breaks without noticeable change in the vessels trim. In cases of very thick ice, an icebreaker can drive its bow onto the ice to break it under the weight of the ship, even in the earliest days of polar exploration, ice-strengthened ships were used. These were originally wooden and based on existing designs, but reinforced, particularly around the waterline with double planking to the hull, bands of iron were wrapped around the outside. Sometimes metal sheeting was placed at the bows, stern and along the keel, such strengthening was designed to help the ship push through ice and also to protect the ship in case it was nipped by the ice. Nipping occurs when ice floes around a ship are pushed against the ship, trapping it as if in a vise and this vise-like action is caused by the force of winds and tides on ice formations. Although such wind and tidal forces may be exerted many miles away, the first boats to be used in the polar waters were those of the indigenous Arctic people. Their kayaks are small human-powered boats with a deck, and one or more cockpits. Such boats, of course, have no icebreaking capabilities, but they are light, in the 9th and 10th centuries, the Viking expansion reached the North Atlantic, and eventually Greenland and Svalbard in the Arctic. Vikings, however, operated their ships in the waters that were ice-free for most of the year, in the 11th century, in North-Russia started settling the coasts of the White Sea, named so for being ice-covered for over half of a year. The mixed ethnic group of the Karelians and the Russians in the North-Russia that lived on the shores of the Arctic Ocean became known as Pomors. Gradually they developed a type of small one- or two-mast wooden sailing ships, used for voyages in the ice conditions of the Arctic seas. These earliest icebreakers were called kochi, the kochs hull was protected by a belt of ice-floe resistant flush skin-planking along the variable water-line, and had a false keel for on-ice portage. If a koch became squeezed by the ice-fields, its rounded bodylines below the water-line would allow for the ship to be pushed up out of the water, in the 19th century, similar protective measures were adopted to modern steam-powered icebreakers. Fram is said to be the ship to have sailed farthest north and farthest south. An early ship designed to operate in icy conditions was a 51-metre wooden paddle steamer,1, that was built for the city of Philadelphia by Vandusen & Birelyn in 1837
5.
Nuclear reactor
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This article is a subarticle of Nuclear power. A nuclear reactor, formerly known as a pile, is a device used to initiate. Nuclear reactors are used at power plants for electricity generation. Heat from nuclear fission is passed to a fluid, which runs through steam turbines. These either drive a ships propellers or turn electrical generators, Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used to produce isotopes for medical and industrial use, some are run only for research. As of April 2014, the IAEA reports there are 435 nuclear power reactors in operation, when a large fissile atomic nucleus such as uranium-235 or plutonium-239 absorbs a neutron, it may undergo nuclear fission. The heavy nucleus splits into two or more nuclei, releasing kinetic energy, gamma radiation, and free neutrons. A portion of neutrons may later be absorbed by other fissile atoms and trigger further fission events, which release more neutrons. This is known as a chain reaction. To control such a chain reaction, neutron poisons and neutron moderators can change the portion of neutrons that will go on to cause more fission. Nuclear reactors generally have automatic and manual systems to shut the fission reaction down if monitoring detects unsafe conditions, commonly-used moderators include regular water, solid graphite and heavy water. Some experimental types of reactor have used beryllium, and hydrocarbons have been suggested as another possibility, the reactor core generates heat in a number of ways, The kinetic energy of fission products is converted to thermal energy when these nuclei collide with nearby atoms. The reactor absorbs some of the rays produced during fission. Heat is produced by the decay of fission products and materials that have been activated by neutron absorption. This decay heat-source will remain for some even after the reactor is shut down. A kilogram of uranium-235 converted via nuclear processes releases approximately three times more energy than a kilogram of coal burned conventionally. A nuclear reactor coolant — usually water but sometimes a gas or a metal or molten salt — is circulated past the reactor core to absorb the heat that it generates
6.
Mil Mi-2
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The Mil Mi-2 is a small, lightly armored turbine-powered transport helicopter that could also provide close air support when armed with 57 mm rockets and a 23 mm cannon. The Mi-2 was produced exclusively in Poland, in the WSK PZL-Świdnik factory in Świdnik, the first production helicopter in the Soviet Union was the Mil Mi-1, modelled along the lines of the S-51 and Bristol Sycamore and flown by Mikhail Mils bureau in September 1948. During the 1950s it became evident, and confirmed by American and French development, S. P. Isotov developed the GTD-350 engine and Mil used two of these in the far superior Mi-2. The twin shaft-turbine engines used in the Mi-2 develop 40% more power than the Mi-1s piston engines, for half the engine weight. The Mi-2 fuselage was altered from its predecessor, with the engines mounted overhead. However, the dimensions remained similar. The Mil-built prototype first flew in the Soviet Union on 22 September 1961, the first Świdnik-built example flew on 4 November 1965. PZL-Świdnik produced a total of 5,497 helicopters, about a third for military users, the factory also developed fiberglass rotor blades, and developed the wide-body Mi-2M seating 10 passengers instead of eight. Most typical kits include four stretchers for air ambulance usage, or aerospraying or cropdusting applications, the Mi-2 was first introduced into the Soviet Air Force in 1965. The Mi-2 is used by mainly former Soviet and Eastern Bloc countries, although it was purchased by Mexico. Most of the armed Mi-2 variants were used by Poland, some were also used by the former East Germany. North Korea still maintains an active fleet of Mi-2s. Mi-2A Mi-2B Upgraded export version for the Middle East, fitted with improved systems, mi-2Ch Chekla Chemical reconnaissance / smokescreen layer version. Mi-2D Przetacznik Aerial command post equipped with R-111 radio, mi-2P Passenger / cargo version, with accommodation for 6 passengers. Mi-2RM Sea rescue version equipped with winch for two people and dropped rafts. Mi-2Ro Reconnaissance version equipped with cameras, mi-2RS Padalec Chemical and biohazard reconnaissance version. Mi-2S Air ambulance version, equipped to carry four litters, plus an attendant, mi-2US Armed version fitted with a fixed 23mm NS-23 cannon,4 x 7, 62mm PKT machine gun pods and optional cabin PK machine gun. Mi-2URN Żmija Armed reconnaissance variant armed with a fixed 23mm NS-23 gun, optional 7, 62mm PK machine gun window-mounted
7.
Mil Mi-8
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The Mil Mi-8 is a medium twin-turbine helicopter, originally designed by the Soviet Union, and now produced by Russia. In addition to its most common role as a helicopter, the Mi-8 is also used as an airborne command post, armed gunship. Along with the related, more powerful Mil Mi-17, the Mi-8 is among the worlds most-produced helicopters, as of 2015, it is the third most common operational military aircraft in the world. Due to the position of the engine, this enabled Mikhail Mil to justify redesigning the front half of the aircraft around the single engine. The prototype, which was named V-8, was designed in 1958, powered by an AI-242,010 kW Soloviev turboshaft engine, the single engined V-8 prototype had its maiden flight in June 1961 and was first shown on Soviet Aviation Day parade in July 1961. During an official visit to the United States in September 1959, on Khrushchevs return, he ordered the creation of a similar helicopter, which was to be ready for the return visit by the American president, to save face. A luxury version of the Mi-4 was quickly created and Khrushchev took an inspection flight, however, it would be necessary to have a second engine for reliability. In May 1960, the order was given for Mikhail Mil to create his twin engine helicopter, the Sergei Isotov Design Bureau accepted the task of creating the engines. The second prototype flew in September 1961, the aircraft completed its factory based testing in February 1963. The fifth and final prototype was a production prototype for the passenger market. In November 1964, all joint testing had completed and the soviet government began mass production. Production started in the Kazan Production Plant, with the first aircraft completed by the end of 1965 and it was only then that the Soviet military rushed a troop-carrying variant of the Mil Mi-8 into production. By 1967, it had introduced into the Soviet Air Force as the Mi-8. There are numerous variants, including the Mi-8T, which, in addition to carrying 24 troops, is armed with rockets, the Mil Mi-17 export version is employed by around 20 countries, its equivalent in Russian service in the Mi-8M series. The only visible difference between the Mi-8 and Mi-17 is that the rotor is on the starboard side of the Mi-8. Also Mi-17 also has some improved armour plating for its crew, the naval Mil Mi-14 version is also derived from the Mi-8. The Mi-8 is constantly improving and the newest version still remains in production in 2016, the Mi-8 family of helicopters became the main Soviet and later Russian helicopter covering a large range of roles in both peace time and war time. Large fleets of Mi-8 and its derivatives are employed by military and civil operators
8.
Kamov Ka-27
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Variants include the Ka-29 assault transport, the Ka-28 downgraded export version, and the Ka-32 for civilian use. The helicopter was developed for ferrying and anti-submarine warfare, design work began in 1969 and the first prototype flew in 1973. It was intended to replace the decade-old Kamov Ka-25, and is similar in appearance to its due to the requirements of fitting in the same hangar space. Like other Kamov military helicopters it has coaxial rotors, removing the need for a tail rotor, Ka-32 variants, e. g. the Klimov-powered Ka-32A11BC, have been certified for commercial operations throughout the world, notably in Canada and Europe. A Russian Navy Ka-27 helicopter from the Russian Udaloy-class destroyer RS Severomorsk conducted interoperability deck landing training on board USS Mount Whitney on 22 July 2010, Ka-32A11BC multipurpose helicopters have been successfully operated in Portugal for over five years. In 2006, KAMOV JSC won the tender for the supply of Ka-32A11BC firefighting helicopters, to replace Aérospatiale SA-330 Pumas, the Ka-32A11BC features a high power-to-weight ratio and ease of handling, owing to its coaxial rotor design. The Ka-32A11BC may be equipped with the Bambi Bucket suspended fire-fighting system of up to five tons capacity, the service life has been extended to up to 32000 flight hours. Since the 1990s, China has purchased the Ka-28 export version, Ka-31 purchases were first revealed in 2010. It is believed that Chinese Ka-28s have been equipped with enhanced avionics compared to Ka-28s exported to other countries. In 2013, Russia tested the new Kamov Ka-27M with an electronically scanned array radar. The basis of the modernization of the Ka-27M is installed on the airborne radar with an active phased array antenna FH-A. This radar is part of the command and tactical system that combines several other systems, acoustic, magnetometric, signals intelligence. All the information on them is displayed on the display instrumentation, ka-32s are used for construction of transmission towers for overhead power lines, as it has somewhat higher lift capacity than the Vertol 107. In Canada, the Ka-32 is used for selective logging as it is able to lift selective species vertically, in August 2013, a Kamov Ka-32, C-GKHL operating in Bella Coola, Canada, experienced failure of one of its Klimov TV3-117BMA engines. Syrian Navy Ka-27s were used to bomb terrorist groups positions in Damascus during the ongoing Syrian War against terrorist groups, Ka-27PS Search and rescue helicopter, ASW equipment removed and winch fitted. Ka-27PV Armed version of the Ka-27PS, radar mounted under the fuselage and provides allround visibility in the search and detection of surface, air and ground targets. Serial upgrading to the level of combatant helicopters Ka-27M was planned to begin in 2014, until the end of 2016,46 Ka-27PLs planned to modernization, commissioned by the Russian Navy. The first 8 serial Ka-27M, transferred in December 2016, Ka-28 Export version of the Ka-27PL
9.
Nuclear-powered icebreaker
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A nuclear-powered icebreaker is a nuclear-powered ship purpose-built for use in waters covered with ice. The only country constructing nuclear-powered icebreakers is Russia, nuclear-powered icebreakers have been constructed by the USSR and later Russia primarily to aid shipping along the Northern Sea Route in the frozen Arctic waterways north of Siberia. During the winter, the ice along the Northern Sea Route varies in thickness from 1.2 to 2.0 metres, the ice in central parts of the Arctic Ocean is on average 2.5 metres thick. Nuclear-powered icebreakers can force through this ice at speeds up to 10 knots, in ice-free waters the maximum speed of the nuclear-powered icebreakers is as much as 21 knots. Other important ports include Dikson, Tiksi, and Pevek, of six Arktika-class icebreakers built in 1975–2007, four are currently in service. The icebreakers have also used for a number of scientific expeditions in the Arctic. On August 17,1977, Arktika was the first surface vessel in the world to reach the North Pole, since 1989, some icebreakers have been used for Arctic tourist cruises. In all, ten civilian nuclear-powered vessels have been built in the USSR, nine of these are icebreakers, and one is a container ship with an icebreaking bow. All six nuclear-powered icebreakers of the Arktika class have been built at the Baltic Shipyard in St. Petersburg, Vaigach and Taimyr were built at the Helsinki New Shipyard in Finland and then brought to Russia for installation of the reactors and turbogenerators. At its launch in 1957 the icebreaker NS Lenin was both the worlds first nuclear-powered surface ship and the first nuclear-powered civilian vessel, Lenin was put into ordinary operation in 1959. Lenin had two accidents, the first in 1965, and the second in 1967. The second accident resulted in one of the three OK-150 reactors being damaged beyond repair, all three reactors were removed, and replaced by two OK-900 reactors, the ship returned to service in 1970. The Lenin was taken out of operation in November 1989 and laid up at Atomflot, conversion to a museum ship was scheduled to be completed during 2005. Arktika class icebreakers are the bulk of the Russian nuclear icebreaker fleet, since they have been built over a period of thirty years, ships of different classes vary among one another, thus specifications are listed as a range of values. In general, the ships are larger, faster. There is water ballast between the inner and outer hulls which can be shifted to aid icebreaking, icebreaking is also assisted by an air bubbling system which can deliver 24 m³/s of air from jets 9 m below the surface. Some ships have polymer coated hulls to reduce friction, Arktika-class ships can break ice while making way either forwards or backwards. Although they have two reactors, normally only one is used to power, with the other being maintained in a standby mode
10.
Siberia
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Siberia is an extensive geographical region, and by the broadest definition is also known as North Asia. Siberia has historically been a part of Russia since the 17th century, the territory of Siberia extends eastwards from the Ural Mountains to the watershed between the Pacific and Arctic drainage basins. It stretches southwards from the Arctic Ocean to the hills of north-central Kazakhstan and to the borders of Mongolia. With an area of 13.1 million square kilometres, Siberia accounts for 77% of Russias land area and this is equivalent to an average population density of about 3 inhabitants per square kilometre, making Siberia one of the most sparsely populated regions on Earth. If it were a country by itself, it would still be the largest country in area, the origin of the name is unknown. Some sources say that Siberia originates from the Siberian Tatar word for sleeping land, another account sees the name as the ancient tribal ethnonym of the Sirtya, a folk, which spoke a language that later evolved into the Ugric languages. This ethnic group was assimilated to the Siberian Tatar people. The modern usage of the name was recorded in the Russian language after the Empires conquest of the Siberian Khanate, a further variant claims that the region was named after the Xibe people. The Polish historian Chycliczkowski has proposed that the name derives from the word for north. He said that the neighbouring Chinese, Arabs and Mongolians would not have known Russian and he suggests that the name is a combination of two words, su and bir. The region is of significance, as it contains bodies of prehistoric animals from the Pleistocene Epoch. Specimens of Goldfuss cave lion cubs, Yuka and another woolly mammoth from Oymyakon, a rhinoceros from the Kolyma River. The Siberian Traps were formed by one of the largest known volcanic events of the last 500 million years of Earths geological history. They continued for a million years and are considered a cause of the Great Dying about 250 million years ago. At least three species of human lived in Southern Siberia around 40,000 years ago, H. sapiens, H. neanderthalensis, the last was determined in 2010, by DNA evidence, to be a new species. Siberia was inhabited by different groups of such as the Enets, the Nenets, the Huns, the Scythians. The Khan of Sibir in the vicinity of modern Tobolsk was known as a prominent figure who endorsed Kubrat as Khagan of Old Great Bulgaria in 630, the Mongols conquered a large part of this area early in the 13th century. With the breakup of the Golden Horde, the autonomous Khanate of Sibir was established in the late 15th century, turkic-speaking Yakut migrated north from the Lake Baikal region under pressure from the Mongol tribes during the 13th to 15th century
11.
Keel laying
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Laying the keel or laying down is the formal recognition of the start of a ships construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company, keel laying is one of the four specially-celebrated events in the life of a ship, the others are launching, commissioning, and decommissioning. In earlier times, the event recognized as the keel laying was the placement of the central timber making up the backbone of a vessel. As steel ships replaced wooden ones, the central timber gave way to a steel beam. Modern ships are now built in a series of pre-fabricated. The event recognized as the keel laying is the first joining of modular components and it is now often called keel authentication, and is the ceremonial beginning of the ships life, although modules may have been started months before that stage of construction. Keel-related traditions from the times of wooden ships are said to bring luck to the ship during construction and to the captain, the first milestone in the history of a ship is the generally simple ceremony that marks the laying of the keel. Invitations to the ceremony are issued by officials, and the ceremony is conducted by them. The builder may be the commander of a shipyard or the president of a private company. The ships prospective name, without the USS, is mentioned in the invitation, if known, otherwise her type and number are given, e. g. DD2217
12.
Ceremonial ship launching
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Ceremonial ship launching is the process of transferring a vessel to the water. It is a tradition in many cultures, dating back thousands of years. It has been observed as a celebration and a solemn blessing. The process also involves many traditions intended to invite good luck, such as christening by breaking a bottle of champagne over the bow as the ship is named aloud. There are three methods of conveying a new ship from building site to water, only two of which are called launching. The oldest, most familiar, and most widely used is the launch, in which the vessel slides down an inclined slipway. With the side launch, the ship enters the water broadside and this method came into use in the 19th-century on inland waters, rivers, and lakes, and was more widely adopted during World War II. The third method is float-out, used for ships that are built in basins or dry docks and then floated by admitting water into the dock. In all cases, heavy chains are attached to the ship, normally, ways are arranged perpendicular to the shore line and the ship is built with its stern facing the water. The barricades support the two launch ways, the vessel is built upon temporary cribbing that is arranged to give access to the hulls outer bottom and to allow the launchways to be erected under the complete hull. When it is time to prepare for launching, a pair of standing ways is erected under the hull, the surface of the ways is greased. A pair of sliding ways is placed on top, under the hull, the weight of the hull is then transferred from the build cribbing onto the launch cradle. On launching, the vessel slides backwards down the slipway on the ways until it floats by itself, some slipways are built so that the vessel is side-on to the water and is launched sideways. This is done where the limitations of the channel would not allow lengthwise launching. The Great Eastern designed by Brunel was built this way as were many landing craft during World War II and this method requires many more sets of ways to support the weight of the ship. Sometimes ships are launched using a series of inflated tubes underneath the hull and this procedure has the advantages of requiring less permanent infrastructure, risk, and cost. The airbags provide support to the hull of the ship and aid its launching motion into the water and these airbags are usually cylindrical in shape with hemispherical heads at both ends. The Xiao Qinghe shipyard launched a tank barge with marine airbags on January 20,1981, egyptians, Greeks, and Romans called on their gods to protect seamen
Russia
Media related to IMO 9077549 at Wikimedia Commons