1.
Atoll
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An atoll, sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely. There may be coral islands/cays on the rim, the coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water. The lagoon forms over the crater or caldera while the higher rim remains above water or at shallow depths that permit the coral to grow. For the atoll to persist, continued erosion or subsidence must be at a slow enough to permit reef growth upwards and outwards to replace the lost height. The word atoll comes from the Dhivehi word atholhu, meaning an administrative subdivision, the distribution of atolls around the globe is instructive, most of the worlds atolls are in the Pacific Ocean and Indian Ocean. The Atlantic Ocean has no large groups of atolls, other than eight atolls east of Nicaragua that belong to the Colombian department of San Andres and Providencia in the Caribbean. Reef-building corals will thrive only in tropical and subtropical waters of oceans and seas. The northernmost atoll of the world is Kure Atoll at 28°24 N, the southernmost atolls of the world are Elizabeth Reef at 29°58 S, and nearby Middleton Reef at 29°29 S, in the Tasman Sea, both of which are part of the Coral Sea Islands Territory. The next southerly atoll is Ducie Island in the Pitcairn Islands Group, at this latitude coral reefs would not develop without the warming waters of the Gulf Stream. However, Bermuda is termed a pseudo-atoll because its general form, while there is no atoll directly on the equator, the closest atoll to the Equator is Aranuka of Kiribati, with its southern tip just 12 km north of the equator. In most cases, the area of an atoll is very small in comparison to the total area. Atoll islands are low lying, with their elevations less than 5 meters, measured by total area, Lifou is the largest raised coral atoll of the world, followed by Rennell Island. More sources however list as the largest atoll in the world in terms of land area Kiritimati, the remains of an ancient atoll as a hill in a limestone area is called a reef knoll. The second largest atoll by dry land area is Aldabra with 155 km², the largest atoll in terms of island numbers is Huvadhu Atoll in the south of the Maldives with 255 islands. In 1842, Charles Darwin explained the creation of coral atolls in the southern Pacific Ocean based upon observations made during a voyage aboard the HMS Beagle from 1831 to 1836. In time, subsidence carries the old volcano below the ocean surface, at this point, the island has become an atoll. Atolls are the product of the growth of marine organisms. Volcanic islands located beyond the water temperature requirements of hermatypic organisms become seamounts as they subside and are eroded away at the surface
2.
Kiribati
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Kiribati, officially the Republic of Kiribati, is an island nation in the central Pacific Ocean. The permanent population is just over 100,000, more than half of live on Tarawa Atoll. The nation comprises 33 atolls and reef islands and one raised coral island and they have a total land area of 800 square kilometres and are dispersed over 3.5 million square kilometers. Their spread straddles the equator and the 180th meridian, although the International Date Line is indented to bring the Line Islands in the day as the Kiribati Islands. The International Date Line circumscribes Kiribati by swinging far to the east, almost reaching the 150°W meridian, Kiribatis easternmost islands, the southern Line Islands south of Hawaii, have the most advanced time on Earth, UTC+14 hours. Kiribati became independent from the United Kingdom in 1979, the capital and now most populated area, South Tarawa, consists of a number of islets, connected by a series of causeways. These comprise about half the area of Tarawa Atoll, Kiribati is a member of the Commonwealth of Nations, the IMF and the World Bank, and became a full member of the United Nations in 1999. The name Kiribati was adopted at independence and it is local enunciation of Gilberts. This name derives from the archipelago that forms the nation. It was named the Gilbert Islands after the British explorer Thomas Gilbert and he sighted many of the islands in 1788 while mapping out the Outer Passage route from Port Jackson to Canton. The Kiribati archipelago was named Îles Gilbert, in about 1820, by Russian admiral Adam von Krusenstern, both their maps, published in 1820, were written in French. The archipelagos name was incorporated in the entire Gilbert and Ellice Islands Colony from 1916, the spelling of Gilberts in the Gilbertese language as Kiribati may be found in books in Gilbertese prepared by missionaries and others. It is often suggested that the name for the Gilbert Islands proper is Tungaru. The pronunciation differs, Kiribas is the pronunciation as ti in Kiribatese makes an s sound. The area now called Kiribati has been inhabited by Micronesians speaking the same Oceanic language since sometime between 3000 BC and AD1300, the area was not isolated, invaders from Samoa, Tonga, and Fiji, later introduced Polynesian and Melanesian cultural aspects, respectively. Intermarriage tended to blur cultural differences and resulted in a significant degree of cultural homogenisation, chance visits by European ships occurred in the 17th and 18th centuries, as these ships attempted circumnavigations of the world or sought sailing routes from the south to north Pacific Ocean. The passing trade gave rise to European, Chinese, Samoan and other residents from the 1830s, they included beachcombers, castaways, traders and missionaries. In 1892 local authorities on each of the Gilbert Islands agreed to Captain Davis RN declaring them part of a British protectorate with the nearby Ellice Islands
3.
South Tarawa
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South Tarawa is the capital and hub of the Republic of Kiribati and home to approximately half of Kiribatis total population. The South Tarawa population centre consists of all the islets from Betio in the West to Bonriki in the East, connected by the South Tarawa main road. The Roman Catholic diocese is based in Teaorereke, the Kiribati Protestant Church in Antebuka, at the local government level, South Tarawa has two administrative subdivisions, Betio Town Council, on Betio, Teinainano Urban Council, from Bairiki to Tanaea. South Tarawa is a string of islets between the Tarawa Lagoon to the north, with a depth of 25 metres. The island has been built from sediments from the lagoon, the process of soil accumulation is driven by the dominant easterly trade winds, and can be reversed during extended periods of westerly winds during El Niño–Southern Oscillations. All of these islets are now joined by causeways, forming one long islet on the reef along the side of the Tarawa Lagoon. Most of South Tarawa is less than 3 metres above sea level with a width of only 450 metres. At the time of the 1978 Census, South Tarawa had a population of 17,921 with most residents living in the population centres of Betio, Bairiki. Since Kiribati became independent in 1979, the population of South Tarawa has almost tripled, all of South Tarawa is now urbanised, and is effectively one continuous settlement from the Northeastern end of the island, Tanaea, to its Southwestern end at Betio. Buota in North Tarawa is also connected to the South Tarawa main road and is growing rapidly. Betio was the location of the Battle of Tarawa, the highest point on South Tarawa is only a few meters above sea level, making the island extremely vulnerable to climate change and natural disasters. Already the effects of rising sea-levels and associated soil salination are starting to threaten limited fresh water supplies, the weather in South Tarawa is warm and humid all year round and average rainfalls are relatively high. However rainfall is unpredictable, varying with the El Niño–Southern Oscillation. South Tarawa has very limited resources for its rapidly growing population. During the frequent droughts, the source of water is the shallow freshwater lens which permeates the coral rock of the atoll. The water lenses at Bonriki and Buota have been declared as water reserves, other previously declared water reserves have been relinquished for urbanisation, or abandoned due to over-pumping and pollution from human settlement. Most schools and community buildings have no water supply at all, because of the shortage of fresh water, sanitation systems must use saltwater for flushing. The current sanitation network on South Tarawa is performing poorly
4.
Breadfruit
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Breadfruit is a species of flowering tree in the mulberry and jackfruit family originating in the South Pacific and that was eventually spread to the rest of Oceania. Its name is derived from the texture of the ripe fruit when cooked, similar to freshly baked bread. According to DNA fingerprinting studies, breadfruit has its origins in the region of Oceania from New Guinea through the Indo-Malayan Archipelago to western Micronesia, the trees have been widely planted in tropical regions elsewhere, including lowland Central America, northern South America, and the Caribbean. In addition to the serving as a staple food in many cultures. Sir Joseph Banks and others saw the value of breadfruit as a highly productive food in 1769, in 1787, William Bligh was appointed Captain of the HMS Bounty, and ordered to proceed to the South Pacific to collect the plants. Although Bligh won the Royal Society medal for his efforts, the introduction was not entirely successful, Breadfruit trees grow to a height of 26 m. The large and thick leaves are cut into pinnate lobes. All parts of the tree yield latex, which is useful for boat caulking, the trees are monoecious, with male and female flowers growing on the same tree. The male flowers emerge first, followed shortly afterward by the female flowers, the latter grow into capitula, which are capable of pollination just three days later. Pollination occurs mainly by bats, but cultivated varieties produce fruit without pollination. The compound, false fruit develops from the perianth, and originates from 1. Breadfruit is one of the food plants, with a single tree producing up to 200 or more grapefruit-sized fruits per season. In the South Pacific, the trees yield 50 to 150 fruits per year, usually round, productivity varies between wet and dry areas. Studies in Barbados indicate a potential of 16 to 32 tons per hectare. The ovoid fruit has a surface, and each fruit is divided into many achenes, each achene surrounded by a fleshy perianth. Most selectively bred cultivars have seedless fruit, whereas seeded varieties are mainly for their edible seeds. Breadfruit is usually propagated using root cuttings, Breadfruit is closely related to the breadnut, from which it might have been naturally selected. It is noticeably similar in appearance to its relative of the same genus, Breadfruit has hundreds of varieties and thousands of common names varying according to its geographic distribution, and is cultivated in some 90 countries
5.
Papaya
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The papaya, papaw, or pawpaw is the plant Carica papaya, one of the 22 accepted species in the genus Carica of the family Caricaceae. It is native to the tropics of the Americas, perhaps from southern Mexico and it was first cultivated in Mexico several centuries before the emergence of the Mesoamerican classical civilizations. The papaya is a small, sparsely branched tree, usually with a stem growing from 5 to 10 m tall. The lower trunk is conspicuously scarred where leaves and fruit were borne, the leaves are large, 50–70 cm in diameter, deeply palmately lobed, with seven lobes. All parts of the plant contain latex in articulated laticifers, unusually for such large plants, the trees are dioecious. The flowers are 5-parted and highly dimorphic, the flowers with the stamens fused to the petals. The female flowers have a superior ovary and five contorted petals loosely connected at the base, male and female flowers are borne in the leaf axils, the males in multiflowered dichasia, the female flowers is few-flowered dichasia. The flowers are sweet-scented, open at night and are moth-pollinated, the fruit is a large berry about 15–45 cm long and 10–30 cm in diameter. It is ripe when it feels soft and its skin has attained an amber to orange hue, Papaya is native to Mexico and extends to South America and has become naturalized throughout the Caribbean Islands, Florida and several countries of Africa. Additional crops are grown in India, Australia, Malaysia, Indonesia, the Philippines, Thailand, Papaya plants grow in three sexes, male, female, hermaphrodite. The male produces only pollen, never fruit, the female will produce small, inedible fruits unless pollinated. The hermaphrodite can self-pollinate since its flowers contain both male stamens and female ovaries, almost all commercial papaya orchards contain only hermaphrodites. Originally from southern Mexico, Central America, and northern South America, in cultivation, it grows rapidly, fruiting within three years. It is, however, highly frost-sensitive, limiting its production to tropical climates, temperatures below −2 °C are greatly harmful if not fatal. In Florida and California, growth is limited to southern parts of the states. It prefers sandy, well-drained soil, as standing water will kill the plant within 24 hours, India and Brazil are the major producers of papaya, together providing 57% of the world total of 12.4 million tons in 2013. Gaining in popularity among tropical fruits worldwide, papaya is now ranked fourth in total tropical fruit production after bananas, oranges, global papaya production has grown significantly over the last few years, mainly as a result of increased production in India. Papaya has become an important agricultural export for developing countries, where export revenues of the fruit provide a livelihood for thousands of people, especially in Asia, Carica papaya was the first transgenic fruit tree to have its genome sequenced
6.
Coconut
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The coconut tree is a member of the family Arecaceae and the only species of the genus Cocos. The term coconut can refer to the coconut palm or the seed, or the fruit. The spelling cocoanut is a form of the word. The term is derived from the 16th-century Portuguese and Spanish word coco meaning head or skull, coconuts are known for their great versatility, as evidenced by many traditional uses, ranging from food to cosmetics. They form a part of the diets of many people in the tropics and subtropics. Coconuts are distinct from other fruits for their quantity of water. When mature, they can be used as seed nuts or processed to give oil from the kernel, charcoal from the hard shell, the endosperm is initially in its nuclear phase suspended within the coconut water. As development continues, cellular layers of endosperm deposit along the walls of the coconut, when dried, the coconut flesh is called copra. The oil and milk derived from it are used in cooking and frying, as well as in soaps. The husks and leaves can be used as material to make a variety of products for furnishing and decorating, the coconut also has cultural and religious significance in certain societies, particularly in India, where it is used in Hindu rituals. Cocos nucifera is a palm, growing up to 30 m tall, with pinnate leaves 4–6 m long. Coconuts are generally classified into two types, tall and dwarf. On fertile soil, a coconut palm tree can yield up to 75 fruits per year. Given proper care and growing conditions, coconut palms produce their first fruit in six to ten years, botanically, the coconut fruit is a drupe, not a true nut. Like other fruits, it has three layers, the exocarp, mesocarp, and endocarp, the exocarp and mesocarp make up the husk of the coconuts. Coconuts sold in the shops of nontropical countries often have had the exocarp removed, the mesocarp is composed of a fiber, called coir, which has many traditional and commercial uses. The shell has three germination pores or eyes that are visible on its outside surface once the husk is removed. A full-sized coconut weighs about 1.44 kg and it takes around 6,000 full-grown coconuts to produce a tonne of copra
7.
Pandanus
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Pandanus is a genus of monocots with some 750 accepted species. They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics, common names include pandan, screw palm, and screw pine. They are classified in the order Pandanales, family Pandanaceae, often called pandanus palms, these plants are not closely related to palm trees. The species vary in size from small shrubs less than 1 m tall, to medium-sized trees 20 m tall, typically with a canopy, heavy fruit. The trunk is stout, wide-branching, and ringed with leaf scars. Depending on the species, the trunk can be smooth, rough, the roots forms a pyramidal tract to hold the trunk. They commonly have many thick prop roots near the base, which provide support as the tree grows top-heavy with leaves, fruit and these roots are adventitious and often branched. The top of the plant has one or more crowns of strap-shaped leaves that may be spiny and they are dioecious, with male and female flowers produced on different plants. The flowers of the tree are 2–3 cm long and fragrant, surrounded by narrow. The female tree produces flowers with round fruits that are also bract-surrounded, typically, the fruit changes from green to bright orange or red as it matures. The fruits can stay on the tree for more than 12 months and these plants grow from sea level to 3,300 m. Pandanus trees are of cultural, health, and economic importance in the Pacific and they grow wild mainly in seminatural vegetation in littoral habitats throughout the tropical and subtropical Pacific, where they can withstand drought, strong winds, and salt spray. They propagate readily from seed, but also are widely propagated from cuttings by local people. Species growing on exposed headlands and along beaches have thick prop roots as anchors in the loose sand. Those prop roots emerge from the stem, usually close to but above the ground, other species are adapted to mountain habitats and riverine forests. The tree is grown and propagated from shoots that form spontaneously in the axils of lower leaves, Pandanus fruit are eaten by animals including bats, rats, crabs, elephants and monitor lizards, but the vast majority of species are dispersed primarily by water. Its fruit can float and spread to other islands without help from man, craftsmen collect the pandan leaves from plants in the wild. Only the mature leaves are cut so the plant will naturally regenerate, the leaves are sliced in fine strips and sorted for further processing
8.
Cyclone
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In meteorology, a cyclone is a large scale air mass that rotates around a strong center of low atmospheric pressure. A cyclone differs from a hurricane or typhoon only on the basis of location, a hurricane is a storm that occurs in the Atlantic Ocean and northeastern Pacific Ocean, a typhoon occurs in the northwestern Pacific Ocean, and a cyclone occurs in the south Pacific or Indian Ocean. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure, the largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale. Warm-core cyclones such as cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes and dust devils lie within the smaller mesoscale, Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the Tropical Upper Tropospheric Trough during the summer months in the Northern Hemisphere. Cyclones have also seen on extraterrestrial planets, such as Mars. Cyclogenesis describes the process of formation and intensification. Extratropical cyclones begin as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones and these zones contract and form weather fronts as the cyclonic circulation closes and intensifies. Later in their cycle, extratropical cyclones occlude as cold air masses undercut the warmer air. A cyclones track is guided over the course of its 2 to 6 day life cycle by the flow of the subtropical jet stream. Weather fronts mark the boundary between two masses of air of different temperature, humidity, and densities, and are associated with the most prominent meteorological phenomena. Strong cold fronts typically feature narrow bands of thunderstorms and severe weather, such fronts form west of the circulation center and generally move from west to east, warm fronts form east of the cyclone center and are usually preceded by stratiform precipitation and fog. Warm fronts move poleward ahead of the cyclone path, occluded fronts form late in the cyclone life cycle near the center of the cyclone and often wrap around the storm center. Tropical cyclogenesis describes the process of development of tropical cyclones, Tropical cyclones form due to latent heat driven by significant thunderstorm activity, and are warm core. Cyclones can transition between extratropical, subtropical, and tropical phases, mesocyclones form as warm core cyclones over land, and can lead to tornado formation. Waterspouts can also form from mesocyclones, but more often develop from environments of high instability, henry Piddington published almost 40 papers dealing with tropical storms from Calcutta between 1835 and 1855 in The Journal of the Asiatic Society. He also coined the term cyclone, meaning the coil of a snake, in 1842, he published his landmark thesis, Laws of the Storms. There are a number of characteristics common to all cyclones
9.
Bonriki International Airport
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Bonriki International Airport is an international airport in Kiribati, serving as the main gateway to the country. It is located in its capital, South Tarawa, which a group of islets in the atoll of Tarawa in the Gilbert Islands. Fijis national carrier, Fiji Airways, and Kiribatis state-owned airline, Air Kiribati, Nauru Airlines provided a service to Nauru International Airport, via Honiara, the capital of Solomon Islands, and further to Brisbane, Australia. This service was suspended from July 2008 to November 2009, Air Kiribati and Coral Sun Airways both serve all 16 other airports in the Gilbert Islands, but not all these destinations are flown directly from Tarawa. The longer runway at Mullinix became the base for the VII Bomber Command Headquarters, in addition, the USAAF stationed the B-24 Liberator-equipped 11th Bombardment Group and B-25 Mitchell-equipped 41st Bombardment Group at the airfield. In April 1944, the units moved forward to Kwajalein Airfield in the Marshall Islands. By the end of the war, the Americans abandoned the facilities, the airport resides at an elevation of 9 feet above mean sea level. It has one runway designated 09/27 with a surface measuring 2,011 by 41 metres. USAAF in the Central Pacific Arrivals and Departures for Bonriki Airport Current weather for Tarawa, Kiribati at NOAA/NWS Accident history for TRW / NGTA at Aviation Safety Network
10.
East India Company
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The company also ruled the beginnings of the British Empire in India. The company received a Royal Charter from Queen Elizabeth I on 31 December 1600, wealthy merchants and aristocrats owned the Companys shares. Initially the government owned no shares and had only indirect control, during its first century of operation the focus of the Company was trade, not the building of an empire in India. The company eventually came to rule large areas of India with its own armies, exercising military power. Despite frequent government intervention, the company had recurring problems with its finances, the official government machinery of British India had assumed its governmental functions and absorbed its armies. Soon after the defeat of the Spanish Armada in 1588, London merchants presented a petition to Queen Elizabeth I for permission to sail to the Indian Ocean, one of them, Edward Bonventure, then sailed around Cape Comorin to the Malay Peninsula and returned to England in 1594. In 1596, three ships sailed east, however, these were all lost at sea. Two days later, on 24 September, the Adventurers reconvened and resolved to apply to the Queen for support of the project, the Adventurers convened again a year later. For a period of fifteen years the charter awarded the newly formed company a monopoly on trade with all countries east of the Cape of Good Hope and west of the Straits of Magellan. Anybody who traded in breach of the charter without a licence from the Company was liable to forfeiture of their ships and cargo, the governance of the company was in the hands of one governor and 24 directors or committees, who made up the Court of Directors. They, in turn, reported to the Court of Proprietors, ten committees reported to the Court of Directors. According to tradition, business was transacted at the Nags Head Inn, opposite St Botolphs church in Bishopsgate. Sir James Lancaster commanded the first East India Company voyage in 1601, in March 1604 Sir Henry Middleton commanded the second voyage. Early in 1608 Alexander Sharpeigh was appointed captain of the Companys Ascension, thereafter two ships, Ascension and Union sailed from Woolwich on 14 March 1607–8. Initially, the company struggled in the trade because of the competition from the already well-established Dutch East India Company. The company opened a factory in Bantam on the first voyage, the factory in Bantam was closed in 1683. During this time belonging to the company arriving in India docked at Surat. In the next two years, the company established its first factory in south India in the town of Machilipatnam on the Coromandel Coast of the Bay of Bengal
11.
United States Marine Corps
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The U. S. Marine Corps is one of the four armed service branches in the U. S. Department of Defense and one of the seven uniformed services of the United States. The current Chairman of the Joint Chiefs of Staff, the military officer in the U. S. Armed Forces, is a Marine Corps general, the Marine Corps has been a component of the U. S. Department of the Navy since 30 June 1834, working closely with naval forces for training, transportation, and logistics. The USMC operates posts on land and aboard sea-going amphibious warfare ships around the world, two battalions of Continental Marines were formed on 10 November 1775 in Philadelphia as a service branch of infantry troops capable of fighting for independence both at sea and on shore. The role of the Corps has since grown and evolved, expanding to aerial warfare and earning popular titles such as, Americas third air force, and, second land army. By the mid-20th century, the U. S. Marine Corps had become a major theorist of and its ability to rapidly respond on short notice to expeditionary crises gives it a strong role in the implementation and execution of American foreign policy. As of 2016, the USMC has around 182,000 active duty members and it is the smallest of the U. S. The USMC serves as an expeditionary force-in-readiness and this last clause, while seemingly redundant given the Presidents position as Commander-in-chief, is a codification of the expeditionary responsibilities of the Marine Corps. It derives from similar language in the Congressional acts For the Better Organization of the Marine Corps of 1834, in 1951, the House of Representatives Armed Services Committee called the clause one of the most important statutory – and traditional – functions of the Marine Corps. In addition to its duties, the Marine Corps conducts Visit, Board, Search, and Seizure operations, as well as missions in direct support of the White House. The Marine Band, dubbed the Presidents Own by Thomas Jefferson, Marines from Ceremonial Companies A & B, quartered in Marine Barracks, Washington, D. C. The Executive Flight Detachment also provides transport to Cabinet members. The relationship between the Department of State and the U. S. Marine Corps is nearly as old as the corps itself, for over 200 years, Marines have served at the request of various Secretaries of State. After World War II, an alert, disciplined force was needed to protect American embassies, consulates, in 1947, a proposal was made that the Department of War furnish Marine Corps personnel for Foreign Service guard duty under the provisions of the Foreign Service Act of 1946. A formal Memorandum of Agreement was signed between the Department of State and the Secretary of the Navy on December 15,1948, during the first year of the MSG program,36 detachments were deployed worldwide. Continental Marines manned raiding parties, both at sea and ashore, the Advanced Base Doctrine of the early 20th century codified their combat duties ashore, outlining the use of Marines in the seizure of bases and other duties on land to support naval campaigns. Throughout the late 19th and 20th centuries, Marine detachments served aboard Navy cruisers, battleships, Marine detachments served in their traditional duties as a ships landing force, manning the ships weapons and providing shipboard security. Marines would develop tactics and techniques of amphibious assault on defended coastlines in time for use in World War II, during World War II, Marines continued to serve on capital ships
12.
Bunker
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A bunker is a defensive military fortification designed to protect people or valued materials from falling bombs or other attacks. Bunkers are mostly underground, compared to blockhouses which are mostly above ground and they were used extensively in World War I, World War II, and the Cold War for weapons facilities, command and control centers, and storage facilities. Bunkers can also be used as protection from tornadoes, trench bunkers are small concrete structures, partly dug into the ground. Many artillery installations, especially for coastal artillery, have historically been protected by extensive bunker systems, typical industrial bunkers include mining sites, food storage areas, dumps for materials, data storage, and sometimes living quarters. When a house is purpose-built with a bunker, the location is a reinforced below-ground bathroom with fibre-reinforced plastic shells. Bunkers deflect the blast wave from nearby explosions to prevent ear, nuclear bunkers must also cope with the underpressure that lasts for several seconds after the shock wave passes, and block radiation. A bunkers door must be at least as strong as the walls, in bunkers inhabited for prolonged periods, large amounts of ventilation or air conditioning must be provided. Bunkers can be destroyed with explosives and bunker-busting warheads. The word bunker originates as a Scots word for bench, seat, the word possibly has a Scandinavian origin, Old Swedish bunke means boards used to protect the cargo of a ship. A sense of earthen seat is recorded 1805, with the spelling boncure from whence the use to refer to sand traps in golf, all the early references to its usage in the Oxford English Dictionary are to German fortifications. This type of bunker is a concrete structure, partly dug into the ground. Such bunkers give the defending soldiers better protection than the open trench and they also provide shelter against the weather. The front bunker of a system usually includes machine guns or mortars. The rear bunkers are usually used as posts or Tactical Operations Centers, for storage. Many artillery installations, especially for coastal artillery, have historically been protected by extensive bunker systems, artillery bunkers are some of the largest individual pre-Cold War bunkers. The walls of the Batterie Todt gun installation in northern France were up to 3.5 m thick, typical industrial bunkers include mining sites, food storage areas, dumps for materials, data storage, and sometimes living quarters. They were built mainly by nations like Germany during World War II to protect important industries from aerial bombardment, industrial bunkers are also built for control rooms of dangerous activities, e. g. tests of rocket engines or explosive experiments. They are also built in order to perform experiments in them or to store radioactive or explosive goods
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