1.
Geographic coordinate system
–
A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
2.
Body of water
–
A body of water or waterbody is any significant accumulation of water, generally on a planets surface. The term most often refers to oceans, seas, and lakes, a body of water does not have to be still or contained, Rivers, streams, canals, and other geographical features where water moves from one place to another are also considered bodies of water. Most are naturally occurring geographical features, but some are artificial, there are types that can be either. For example, most reservoirs are created by engineering dams, similarly, most harbors are naturally occurring bays, but some harbors have been created through construction. Bodies of water that are navigable are known as waterways, some bodies of water collect and move water, such as rivers and streams, and others primarily hold water, such as lakes and oceans. The term body of water can also refer to a reservoir of water held by a plant, note that there are some geographical features involving water that are not bodies of water, for example waterfalls, geysers and rapids. Arm of the sea - also sea arm, used to describe a sea loch, arroyo - a usually dry creek bed or gulch that temporarily fills with water after a heavy rain, or seasonally. Artificial lake or artificial pond - see reservoir or impoundment, barachois - a lagoon separated from the ocean by a sand bar. Bay - an area of water bordered by land on three sides, similar to, but smaller than a gulf, bayou - a slow-moving stream or a marshy lake. Bight - a large and often only slightly receding bay, or a bend in any geographical feature, billabong - see Oxbow lake, a pond or still body of water created when a river changes course and some water becomes trapped. Boil - see Seep Brook - a small stream, canal - an artificial waterway, usually connected to existing lakes, rivers, or oceans. Channel - the physical confine of a river, slough or ocean consisting of a bed. See also stream bed and strait, earth scientists generally use the term to describe a circular or round inlet with a narrow entrance, though colloquially the term is sometimes used to describe any sheltered bay. Basin - a region of land where water from rain or snowmelt drains downhill into another body of water, such as a river, lake, creek - an inlet of the sea, narrower than a cove. Delta - the location where a river flows into an ocean, sea, estuary, lake, distributary or distributary channel - a stream that branches off and flows away from a main stream channel. Draw - a usually dry creek bed or gulch that temporarily fills with water after a heavy rain, fjord - a submergent landform which has occurred due to glacial activity. Glacier - a large collection of ice or a river that moves slowly down a mountain. Glacial Pothole - see Kettle Gulf - a part of a lake or ocean that extends so that it is surrounded by land on three sides, similar to, but larger than a bay, headland - an area of water bordered by land on three sides
3.
Sea
–
A sea is a large body of salt water that is surrounded in whole or in part by land. More broadly, the sea is the system of Earths salty. The sea moderates Earths climate and has important roles in the cycle, carbon cycle. Although the sea has been traveled and explored since prehistory, the scientific study of the sea—oceanography—dates broadly to the British Challenger expedition of the 1870s. Owing to the present state of continental drift, the Northern Hemisphere is now equally divided between land and sea but the South is overwhelmingly oceanic. Salinity in the ocean is generally in a narrow band around 3. 5% by mass, although this can vary in more landlocked waters, near the mouths of large rivers. About 85% of the solids in the sea are sodium chloride. Deep-sea currents are produced by differences in salinity and temperature, surface currents are formed by the friction of waves produced by the wind and by tides, the changes in local sea level produced by the gravity of the Moon and Sun. The direction of all of these is governed by surface and submarine land masses, former changes in sea levels have left continental shelves, shallow areas in the sea close to land. The most diverse areas surround great tropical coral reefs, whaling in the deep sea was once common but whales dwindling numbers prompted international conservation efforts and finally a moratorium on most commercial hunting. Life may have started there and aquatic microbial mats are generally credited with the oxygenation of Earths atmosphere, the sea is an essential aspect of human trade, travel, mineral extraction, and power generation. It is the scene of activities including swimming, diving, surfing. However, population growth, industrialization, and intensive farming have all contributed to marine pollution. Atmospheric carbon dioxide is being absorbed in increasing amounts, lowering its pH in a known as ocean acidification. The shared nature of the sea has made overfishing an increasing problem, both senses of sea date to Old English, the larger sense has required a definite article since Early Middle English. Seas are generally larger than lakes and contain salt water, while the defining elements of size and being bounded are generally used, there is no formally accepted technical definition of sea among oceanographers. In international law, the United Nations Convention on the Law of the Sea states that all the ocean is the sea. Earth is the known planet with seas of liquid water on its surface, although Mars possesses ice caps
4.
Drainage basin
–
A drainage basin or catchment area is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. Drainage basins connect into other drainage basins at elevations in a hierarchical pattern, with smaller sub-drainage basins. Other terms used to describe drainage basins are catchment, catchment basin, drainage area, river basin and water basin. In closed drainage basins the water converges to a point inside the basin, known as a sink, which may be a permanent lake. The drainage basin acts as a funnel by collecting all the water within the covered by the basin. Each drainage basin is separated topographically from adjacent basins by a perimeter, drainage basins are similar but not identical to hydrologic units, which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system. Hydrologic units are defined to allow multiple inlets, outlets, or sinks, in a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins. Drainage basins of the oceans and seas of the world. Grey areas are endorheic basins that do not drain to the oceans, the following is a list of the major ocean basins, About 48. 7% of the worlds land drains to the Atlantic Ocean. The two major mediterranean seas of the world also flow to the Atlantic, The Caribbean Sea and Gulf of Mexico basin includes most of the U. S. The Mediterranean Sea basin includes much of North Africa, east-central Africa, Southern, Central, and Eastern Europe, Turkey, and the areas of Israel, Lebanon. Just over 13% of the land in the world drains to the Pacific Ocean, the Indian Oceans drainage basin also comprises about 13% of Earths land. It drains the eastern coast of Africa, the coasts of the Red Sea and the Persian Gulf, the Indian subcontinent, Burma, antarctica comprises approximately eight percent of the Earths land. The five largest river basins, from largest to smallest, are the basins of the Amazon, the Río de la Plata, the Congo, the Nile, and the Mississippi. The three rivers that drain the most water, from most to least, are the Amazon, Ganga, endorheic drainage basins are inland basins that do not drain to an ocean. Around 18% of all land drains to endorheic lakes or seas or sinks, the largest of these consists of much of the interior of Asia, which drains into the Caspian Sea, the Aral Sea, and numerous smaller lakes. Some of these, such as the Great Basin, are not single drainage basins but collections of separate, in endorheic bodies of standing water where evaporation is the primary means of water loss, the water is typically more saline than the oceans. An extreme example of this is the Dead Sea, drainage basins have been historically important for determining territorial boundaries, particularly in regions where trade by water has been important
5.
India
–
India, officially the Republic of India, is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and it is bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It shares land borders with Pakistan to the west, China, Nepal, and Bhutan to the northeast, in the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Indias Andaman and Nicobar Islands share a border with Thailand. The Indian subcontinent was home to the urban Indus Valley Civilisation of the 3rd millennium BCE, in the following millennium, the oldest scriptures associated with Hinduism began to be composed. Social stratification, based on caste, emerged in the first millennium BCE, early political consolidations took place under the Maurya and Gupta empires, the later peninsular Middle Kingdoms influenced cultures as far as southeast Asia. In the medieval era, Judaism, Zoroastrianism, Christianity, and Islam arrived, much of the north fell to the Delhi sultanate, the south was united under the Vijayanagara Empire. The economy expanded in the 17th century in the Mughal empire, in the mid-18th century, the subcontinent came under British East India Company rule, and in the mid-19th under British crown rule. A nationalist movement emerged in the late 19th century, which later, under Mahatma Gandhi, was noted for nonviolent resistance, in 2015, the Indian economy was the worlds seventh largest by nominal GDP and third largest by purchasing power parity. Following market-based economic reforms in 1991, India became one of the major economies and is considered a newly industrialised country. However, it continues to face the challenges of poverty, corruption, malnutrition, a nuclear weapons state and regional power, it has the third largest standing army in the world and ranks sixth in military expenditure among nations. India is a constitutional republic governed under a parliamentary system. It is a pluralistic, multilingual and multi-ethnic society and is home to a diversity of wildlife in a variety of protected habitats. The name India is derived from Indus, which originates from the Old Persian word Hindu, the latter term stems from the Sanskrit word Sindhu, which was the historical local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi, which translates as The people of the Indus, the geographical term Bharat, which is recognised by the Constitution of India as an official name for the country, is used by many Indian languages in its variations. Scholars believe it to be named after the Vedic tribe of Bharatas in the second millennium B. C. E and it is also traditionally associated with the rule of the legendary emperor Bharata. Gaṇarājya is the Sanskrit/Hindi term for republic dating back to the ancient times, hindustan is a Persian name for India dating back to the 3rd century B. C. E. It was introduced into India by the Mughals and widely used since then and its meaning varied, referring to a region that encompassed northern India and Pakistan or India in its entirety
6.
Myanmar
–
Myanmar, officially the Republic of the Union of Myanmar and also known as Burma, is a sovereign state in South East Asia bordered by Bangladesh, India, China, Laos and Thailand. About one third of Myanmars total perimeter of 5,876 km, forms an uninterrupted coastline of 1,930 km along the Bay of Bengal, the countrys 2014 census revealed a much lower population than expected, with 51 million people recorded. Myanmar is 676,578 square kilometres in size and its capital city is Naypyidaw and its largest city and former capital city is Yangon. Early civilizations in Myanmar included the Tibeto-Burman-speaking Pyu city-states in Upper Burma, the Pagan Kingdom fell due to the Mongol invasions and several warring states emerged. In the 16th century, reunified by the Taungoo Dynasty, the country was for a period the largest empire in the history of Mainland Southeast Asia. The early 19th century Konbaung Dynasty ruled over an area included modern Myanmar and briefly controlled Manipur. The British invaded Myanmar after three Anglo-Burmese Wars in the 19th century and the became a British colony. Myanmar became an independent nation in 1948, initially as a nation and then, following a coup détat in 1962. For most of its independent years, the country has been engrossed in rampant ethnic strife, during this time, the United Nations and several other organisations have reported consistent and systematic human rights violations in the country. In 2011, the junta was officially dissolved following a 2010 general election. While former military leaders still wield enormous power in the country, there is, however, continuing criticism of the governments treatment of the Muslim Rohingya minority and its poor response to the religious clashes. In the landmark 2015 election, Aung San Suu Kyis party won a majority in both houses, Myanmar is a country rich in jade and gems, oil, natural gas and other mineral resources. In 2013, its GDP stood at US$56.7 billion, the income gap in Myanmar is among the widest in the world, as a large proportion of the economy is controlled by supporters of the former military government. As of 2016, according to the Human Development Index, Myanmar had a level of human development. The renaming remains a contested issue, many political and ethnic opposition groups and countries continue to use Burma because they do not recognise the legitimacy of the ruling military government or its authority to rename the country. The countrys official name is the Republic of the Union of Myanmar. Countries that do not officially recognise that name use the long form Union of Burma instead, in English, the country is popularly known as either Burma or Myanmar /ˈmjɑːnˌmɑːr/. Both these names are derived from the name of the majority Burmese Bamar ethnic group, Myanmar is considered to be the literary form of the name of the group, while Burma is derived from Bamar, the colloquial form of the groups name
7.
Thailand
–
Thailand, officially the Kingdom of Thailand, formerly known as Siam, is a country at the centre of the Indochinese peninsula in Southeast Asia. With a total area of approximately 513,000 km2, Thailand is the worlds 51st-largest country and it is the 20th-most-populous country in the world, with around 66 million people. The capital and largest city is Bangkok, Thailand is a constitutional monarchy and has switched between parliamentary democracy and military junta for decades, the latest coup being in May 2014 by the National Council for Peace and Order. Its capital and most populous city is Bangkok and its maritime boundaries include Vietnam in the Gulf of Thailand to the southeast, and Indonesia and India on the Andaman Sea to the southwest. The Thai economy is the worlds 20th largest by GDP at PPP and it became a newly industrialised country and a major exporter in the 1990s. Manufacturing, agriculture, and tourism are leading sectors of the economy and it is considered a middle power in the region and around the world. The country has always been called Mueang Thai by its citizens, by outsiders prior to 1949, it was usually known by the exonym Siam. The word Siam has been identified with the Sanskrit Śyāma, the names Shan and A-hom seem to be variants of the same word. The word Śyâma is possibly not its origin, but a learned, another theory is the name derives from Chinese, Ayutthaya emerged as a dominant centre in the late fourteenth century. The Chinese called this region Xian, which the Portuguese converted into Siam, the signature of King Mongkut reads SPPM Mongkut King of the Siamese, giving the name Siam official status until 24 June 1939 when it was changed to Thailand. Thailand was renamed Siam from 1945 to 11 May 1949, after which it reverted to Thailand. According to George Cœdès, the word Thai means free man in the Thai language, ratcha Anachak Thai means kingdom of Thailand or kingdom of Thai. Etymologically, its components are, ratcha, -ana- -chak, the Thai National Anthem, written by Luang Saranupraphan during the extremely patriotic 1930s, refers to the Thai nation as, prathet Thai. The first line of the anthem is, prathet thai ruam lueat nuea chat chuea thai, Thailand is the unity of Thai flesh. There is evidence of habitation in Thailand that has been dated at 40,000 years before the present. Similar to other regions in Southeast Asia, Thailand was heavily influenced by the culture and religions of India, Thailand in its earliest days was under the rule of the Khmer Empire, which had strong Hindu roots, and the influence among Thais remains even today. Voretzsch believes that Buddhism must have been flowing into Siam from India in the time of the Indian Emperor Ashoka of the Maurya Empire, later Thailand was influenced by the south Indian Pallava dynasty and north Indian Gupta Empire. The Menam Basin was originally populated by the Mons, and the location of Dvaravati in the 7th century, the History of the Yuan mentions an embassy from the kingdom of Sukhothai in 1282
8.
Indonesia
–
Indonesia, officially the Republic of Indonesia, is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania. Situated between the Indian and Pacific oceans, it is the worlds largest island country, with more than seventeen thousand islands. At 1,904,569 square kilometres, Indonesia is the worlds 14th-largest country in terms of area and worlds 7th-largest country in terms of combined sea. It has an population of over 260 million people and is the worlds fourth most populous country. The worlds most populous island, Java, contains more than half of the countrys population, Indonesias republican form of government includes an elected legislature and president. Indonesia has 34 provinces, of which five have Special Administrative status and its capital and countrys most populous city is Jakarta, which is also the most populous city in Southeast Asia and the second in Asia. The country shares land borders with Papua New Guinea, East Timor, other neighbouring countries include Singapore, Vietnam, the Philippines, Australia, Palau, and the Indian territory of the Andaman and Nicobar Islands. Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support the second highest level of biodiversity. The country has abundant natural resources like oil and natural gas, tin, copper, agriculture mainly produces rice, palm oil, tea, coffee, cacao, medicinal plants, spices and rubber. Indonesias major trading partners are Japan, United States, China, the Indonesian archipelago has been an important region for trade since at least the 7th century, when Srivijaya and then later Majapahit traded with China and India. Local rulers gradually absorbed foreign cultural, religious and political models from the early centuries CE, Indonesian history has been influenced by foreign powers drawn to its natural resources. Indonesia consists of hundreds of native ethnic and linguistic groups. The largest – and politically dominant – ethnic group are the Javanese, a shared identity has developed, defined by a national language, ethnic diversity, religious pluralism within a Muslim-majority population, and a history of colonialism and rebellion against it. Indonesias national motto, Bhinneka Tunggal Ika, articulates the diversity that shapes the country, Indonesias economy is the worlds 16th largest by nominal GDP and the 8th largest by GDP at PPP, the largest in Southeast Asia, and is considered an emerging market and newly industrialised country. Indonesia has been a member of the United Nations since 1950, Indonesia is a member of the G20 major economies and World Trade Organization. The name Indonesia derives from the Greek name of the Indós, the name dates to the 18th century, far predating the formation of independent Indonesia. In 1850, George Windsor Earl, an English ethnologist, proposed the terms Indunesians—and, his preference, in the same publication, one of his students, James Richardson Logan, used Indonesia as a synonym for Indian Archipelago. However, Dutch academics writing in East Indies publications were reluctant to use Indonesia, they preferred Malay Archipelago, the Netherlands East Indies, popularly Indië, the East, and Insulinde
9.
Malaysia
–
Malaysia is a federal constitutional monarchy located in Southeast Asia. Peninsular Malaysia shares a land and maritime border with Thailand and maritime borders with Singapore, Vietnam, East Malaysia shares land and maritime borders with Brunei and Indonesia and a maritime border with the Philippines and Vietnam. The capital city is Kuala Lumpur, while Putrajaya is the seat of the federal government, with a population of over 30 million, Malaysia is the 44th most populous country. The southernmost point of continental Eurasia, Tanjung Piai, is in Malaysia, located in the tropics, Malaysia is one of 17 megadiverse countries on earth, with large numbers of endemic species. Malaysia has its origins in the Malay kingdoms present in the area which, from the 18th century, the first British territories were known as the Straits Settlements, whose establishment was followed by the Malay kingdoms becoming British protectorates. The territories on Peninsular Malaysia were first unified as the Malayan Union in 1946, Malaya was restructured as the Federation of Malaya in 1948, and achieved independence on 31 August 1957. Malaya united with North Borneo, Sarawak, and Singapore on 16 September 1963 to become Malaysia, less than two years later in 1965, Singapore was expelled from the federation. The country is multi-ethnic and multi-cultural, which plays a role in politics. About half the population is ethnically Malay, with minorities of Malaysian Chinese, Malaysian Indians. The constitution declares Islam the state religion while allowing freedom of religion for non-Muslims, the government system is closely modelled on the Westminster parliamentary system and the legal system is based on common law. The head of state is the king, known as the Yang di-Pertuan Agong and he is an elected monarch chosen from the hereditary rulers of the nine Malay states every five years. The head of government is the prime minister, since its independence, Malaysia has had one of the best economic records in Asia, with its GDP growing at an average of 6. 5% per annum for almost 50 years. The economy has traditionally been fuelled by its resources, but is expanding in the sectors of science, tourism, commerce. Today, Malaysia has a newly industrialised market economy, ranked third largest in Southeast Asia, the name Malaysia is a combination of the word Malay and the Latin-Greek suffix -sia/-σία. The word melayu in Malay may derive from the Tamil words malai and ur meaning mountain and city, land, malayadvipa was the word used by ancient Indian traders when referring to the Malay Peninsula. Whether or not it originated from these roots, the word melayu or mlayu may have used in early Malay/Javanese to mean to steadily accelerate or run. This term was applied to describe the current of the river Melayu in Sumatra. The name was adopted by the Melayu Kingdom that existed in the seventh century on Sumatra
10.
Indian Ocean
–
The Indian Ocean is the third largest of the worlds oceanic divisions, covering 70,560,000 km2. It is bounded by Asia on the north, on the west by Africa, on the east by Australia, the Indian Ocean is known as Ratnākara, the mine of gems in ancient Sanskrit literature, and as Hind Mahāsāgar, in Hindi. The northernmost extent of the Indian Ocean is approximately 30° north in the Persian Gulf, the oceans continental shelves are narrow, averaging 200 kilometres in width. An exception is found off Australias western coast, where the width exceeds 1,000 kilometres. The average depth of the ocean is 3,890 m and its deepest point is Diamantina Deep in Diamantina Trench, at 8,047 m deep, Sunda Trench has a depth of 7, 258–7,725 m. North of 50° south latitude, 86% of the basin is covered by pelagic sediments. The remaining 14% is layered with terrigenous sediments, glacial outwash dominates the extreme southern latitudes. The major choke points include Bab el Mandeb, Strait of Hormuz, the Lombok Strait, the Strait of Malacca, the Indian Ocean is artificially connected to the Mediterranean Sea through the Suez Canal, which is accessible via the Red Sea. All of the Indian Ocean is in the Eastern Hemisphere and the centre of the Eastern Hemisphere is in this ocean, marginal seas, gulfs, bays and straits of the Indian Ocean include, The climate north of the equator is affected by a monsoon climate. Strong north-east winds blow from October until April, from May until October south, in the Arabian Sea the violent Monsoon brings rain to the Indian subcontinent. In the southern hemisphere, the winds are milder. When the monsoon winds change, cyclones sometimes strike the shores of the Arabian Sea, the Indian Ocean is the warmest ocean in the world. Long-term ocean temperature records show a rapid, continuous warming in the Indian Ocean, Indian Ocean warming is the largest among the tropical oceans, and about 3 times faster than the warming observed in the Pacific. Research indicates that human induced greenhouse warming, and changes in the frequency, among the few large rivers flowing into the Indian Ocean are the Zambezi, Shatt al-Arab, Indus, Godavari, Krishna, Narmada, Ganges, Brahmaputra, Jubba and Irrawaddy River. The oceans currents are controlled by the monsoon. Two large gyres, one in the northern hemisphere flowing clockwise and one south of the equator moving anticlockwise, during the winter monsoon, however, currents in the north are reversed. Deep water circulation is controlled primarily by inflows from the Atlantic Ocean, the Red Sea, north of 20° south latitude the minimum surface temperature is 22 °C, exceeding 28 °C to the east. Southward of 40° south latitude, temperatures drop quickly, surface water salinity ranges from 32 to 37 parts per 1000, the highest occurring in the Arabian Sea and in a belt between southern Africa and south-western Australia
11.
Bay of Bengal
–
The Bay of Bengal, the largest bay in the world, forms the northeastern part of the Indian Ocean. Roughly triangular, it is bordered mostly by India and Sri Lanka to the west, Bangladesh to the north, and Myanmar, the Bay of Bengal occupies an area of 2,172,000 square kilometres. Among the important ports are Chennai, Chittagong, Colombo, Kolkata, Mongla, Paradip, Tuticorin, Visakhapatnam, on the south, Adams Bridge and from the southern extreme of Dondra Head to the north point of Poeloe Bras. The bay gets its name from the historical Bengal region, in ancient Hindu scriptures, this water body is referred to as Mahodadhi while it appears as Sinus Gangeticus or Gangeticus Sinus, meaning Gulf of the Ganges, in ancient maps. The other Sanskrit names for Bay of Bengal are Vangopasagara, also called as Vangasagara. Even today in Bengali, it is known as Bongoposagor, many major rivers of the Indian subcontinent flow west to east before draining into the Bay of Bengal. The Ganga is the northernmost of these and its main channel enters and flows through Bangladesh, where it is known as the Padma River, before joining the Meghna River. However, the Brahmaputra River flows from east to west in Assam before turning south and this joins the Padma whereupon the Padma joins the Meghna River that finally drains into Bay of Bengal. The Sundarbans mangrove forest at the delta of the Ganges, Brahmaputra and Meghna rivers lies partly in West Bengal, the Brahmaputra at 2,948 km is the 28th longest River in the world. The Hooghly River, another channel of the Ganga that flows through Calcutta drains into Bay of Bengal in India itself, the Ganga–Brahmaputra rivers deposits nearly 1000 million tons of sediment per year. The Bay of Bengal used to be deeper than the Mariana Trench, the fan has buried organic carbon at a rate of nearly 1.1 trillion mol/yr since the early Miocene period. The two rivers currently contribute nearly 8% of the organic carbon deposited in the worlds oceans. Due to high TOC accumulation in the sea bed of the Bay of Bengal. Bangladesh can reclaim land substantially and economically from the sea area by constructing sea dikes, bunds, causeways and by trapping the sediment from its rivers. Further south of Bengal, the Mahanadi, Godavari, Krishna and Kaveri Rivers are the rivers that flow from west to east in the Indian subcontinent. Many small rivers drain directly into the Bay of Bengal. The Irrawaddy River in Myanmar flows into the Andaman Sea of the Bay of Bengal, some of the biggest ports in the world — Chennai, Visakhapatnam, Paradip, Kolkata in India as well as Chittagong and Mongla in Bangladesh — are on the bay. Other Indian ports on the bay include Kakinada, Pondicherry, Dhamra, the islands in the bay are numerous, including the Andaman Islands, Nicobar and Mergui groups of India
12.
Andaman and Nicobar Islands
–
The Andaman and Nicobar Islands, one of the seven union territories of India, are a group of islands at the juncture of the Bay of Bengal and Andaman Sea. The territory is 150 km north of Aceh in Indonesia and separated from Thailand and it comprises two island groups, the Andaman Islands and the Nicobar Islands, separated by the 10°N parallel, with the Andamans to the north of this latitude, and the Nicobars to the south. The Andaman Sea lies to the east and the Bay of Bengal to the west, the territorys capital is the Andamanese town of Port Blair. The total land area of islands is approximately 8,249 km2. The capital of Nicobar Islands is Car Nicobar, the islands host the Andaman and Nicobar Command, the only tri-service geographical command of the Indian Armed Forces. The Andaman Islands are home to the only known Paleolithic people, the Sentinelese people, the earliest archaeological evidence yet documented goes back some 2,200 years. Since that time, the Andamanese have diversified into distinct linguistic, the Nicobar Islands appear to have been populated by people of various backgrounds. At the time of the European contact, the inhabitants were the Nicobarese people, speaking a Mon-Khmer language. Both are unrelated to the Andamanese, but being closely related to the Myanmarese, rajendra Chola I, one of the Tamil Chola dynasty kings, conquered the Andaman and Nicobar Islands to use them as a strategic naval base to launch a naval expedition against the Sriwijaya Empire. The islands also provided a maritime base for ships of the Maratha Empire in the 17th century. The Maratha navys admiral Kanhoji Angre established naval supremacy with a base in the islands and is credited with attaching those islands to India. The history of organised European colonisation on the islands began when the Danish settlers of the Danish East India Company arrived in the Nicobar Islands on 12 December 1755. On 1 January 1756, the Nicobar Islands were made a Danish colony, first named New Denmark, during 1754–1756 they were administrated from Tranquebar. The islands were abandoned due to outbreaks of malaria between 14 April 1759 and 19 August 1768, from 1787 to 1807/05,1814 to 1831,1830 to 1834. From 1 June 1778 to 1784, Austria mistakenly assumed that Denmark had abandoned its claims to the Nicobar Islands and attempted to establish a colony on them, renaming them Theresia Islands. In 1789 the British set up a base and penal colony on Chatham Island next to Great Andaman. Two years later the colony was moved to Port Cornwallis on Great Andaman, denmarks presence in the territory ended formally on 16 October 1868 when it sold the rights to the Nicobar Islands to Britain, which made them part of British India in 1869. In 1858 the British again established a colony at Port Blair, the primary purpose was to set up a penal colony criminal convicts from the Indian subcontinent
13.
Malay Peninsula
–
The Malay Peninsula is a peninsula in Southeast Asia. The land mass runs approximately north-south and, at its terminus, is the southernmost point of the Asian mainland, the area contains the southernmost tip of Myanmar, Peninsular Malaysia, and Southern Thailand. The Titiwangsa Mountains are part of the Tenasserim Hills system, and they form the southernmost section of the central cordillera which runs from Tibet through the Kra Isthmus into the Malay Peninsula. The Strait of Malacca separates the Malay Peninsula from the Indonesian island of Sumatra while the south coast is separated from the island of Singapore by the Straits of Johor, the Malay term Tanah Melayu is derived from the word Tanah and Melayu, thus it means the Malay land. The term can be found in various pre-modern Malay texts, of which the oldest dating back to the early 17th century and it is frequently mentioned in the Hikayat Hang Tuah, a well known classical work that began as oral tales associated with the legendary heroes of Malacca Sultanate. Tanah Melayu in the text is consistently employed to refer to the area under Melakan dominance, prior to the foundation of Melaka, reference to Malay peninsula was made in different terms from various foreign sources. According to several Indian scholars, the word Malayadvipa, mentioned in the ancient Indian text, Vayu Purana, may possibly refer to the Malay peninsula. Another Indian source, an inscription on the wall of the Brihadeeswarar Temple, recorded the word Malaiur. The Greek source, Geographia, written by Ptolemy, labelled a geographical part of Golden Chersonese as Maleu-kolon, a term thought to derive from Sanskrit malayakolam or malaikurram. During the same era, Marco Polo made a reference to Malauir in his travelogue, as a kingdom located in the Malay peninsula, possibly similar to the one mentioned in Yuan chronicle
14.
Sumatra
–
Sumatra is a large island in western Indonesia that is part of the Sunda Islands. It is the largest island that is entirely in Indonesia and the sixth-largest island in the world at 473,481 km2, Sumatra is an elongated landmass spanning a diagonal northwest-southeast axis. The Indian Ocean borders the west, northwest, and southwest sides of Sumatra with the chain of Simeulue, Nias. On the northeast side the narrow Strait of Malacca separates the island from the Malay Peninsula, on the southeast the narrow Sunda Strait separates Sumatra from Java. The northern tip of Sumatra borders the Andaman Islands, while on the eastern side are the islands of Bangka and Belitung, Karimata Strait. The Bukit Barisan mountains, which several active volcanoes, form the backbone of the island, while the northeast sides are outlying lowlands with swamps, mangrove. The equator crosses the island at its center on West Sumatra, the climate of the island is tropical, hot and humid with lush tropical rain forest once dominating the landscape. Sumatra was known in ancient times by the Sanskrit names of Swarnadwīpa and Swarnabhūmi, the first word mentioning the name of Sumatra was the name of Srivijayan Haji Sumatrabhumi, who sent an envoy to China in 1017. Arab geographers referred to the island as Lamri in the tenth through thirteenth centuries, late in the 14th century the name Sumatra became popular in reference to the kingdom of Samudra Pasai, which was a rising power until it was replaced by Sultanate of Aceh. Sultan Alauddin Shah of Aceh, on letters written in 1602 addressed to Queen Elizabeth I of England, referred to himself as king of Aceh, the word itself is from Sanskrit Samudra, meaning gathering together of waters, sea or ocean. European writers in the 19th century found that the inhabitants did not have a name for the island. The Melayu Kingdom was absorbed by Srivijaya, Srivijaya was a Buddhist monarchy centred in what is now Palembang. Dominating the region trade and conquest throughout the 7th to 9th centuries. The empire was a thalassocracy or maritime power that extended its influence from island to island, Palembang was a center for scholarly learning, and it was there the Chinese Buddhist pilgrim I Ching studied Sanskrit in 671 CE before departing for India. On his journey to China, he spent four years in Palembang translating Buddhist texts, Srivijayan influence waned in the 11th century after it was defeated by the Chola Empire of southern India. At the same time, Islam made its way to Sumatra through Arabs, by the late 13th century, the monarch of the Samudra kingdom had converted to Islam. Marco Polo visited the island in 1292, and Ibn Battuta visited twice during 1345–1346, Samudra was succeeded by the powerful Aceh Sultanate, which survived to the 20th century. With the coming of the Dutch, the many Sumatran princely states fell under their control
15.
Coral reef
–
Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. Coral reefs are built by colonies of tiny animals found in waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups, the polyps belong to a group of animals known as Cnidaria, which also includes sea anemones and jellyfish. Unlike sea anemones, corals secrete hard carbonate exoskeletons which support, most reefs grow best in warm, shallow, clear, sunny and agitated waters. Often called rainforests of the sea, shallow coral reefs form some of the most diverse ecosystems on Earth, paradoxically, coral reefs flourish even though they are surrounded by ocean waters that provide few nutrients. They are most commonly found at depths in tropical waters. Coral reefs deliver ecosystem services to tourism, fisheries and shoreline protection, the annual global economic value of coral reefs is estimated between US$29. 8-375 billion. However, coral reefs are fragile ecosystems, partly because they are sensitive to water temperature. Most of the coral reefs we can see today were formed after the last glacial period when melting ice caused the sea level to rise and this means that most modern coral reefs are less than 10,000 years old. As communities established themselves on the shelves, the reefs grew upwards, Reefs that rose too slowly could become drowned reefs. They are covered by so much water there was insufficient light. Coral reefs are found in the sea away from continental shelves, around oceanic islands. The vast majority of islands are volcanic in origin. The few exceptions have tectonic origins where plate movements have lifted the deep ocean floor on the surface. In 1842 in his first monograph, The Structure and Distribution of Coral Reefs, Charles Darwin set out his theory of the formation of atoll reefs and he theorized uplift and subsidence of the Earths crust under the oceans formed the atolls. Darwin’s theory sets out a sequence of three stages in atoll formation and it starts with a fringing reef forming around an extinct volcanic island as the island and ocean floor subsides. As the subsidence continues, the reef becomes a barrier reef. Darwin predicted that underneath each lagoon would be a bed rock base, where the level of the underlying earth allows, the corals grow around the coast to form what he called fringing reefs, and can eventually grow out from the shore to become a barrier reef
16.
2004 Indian Ocean earthquake and tsunami
–
The 2004 Indian Ocean earthquake occurred at 00,58,53 UTC on 26 December with the epicentre off the west coast of Sumatra, Indonesia. The shock had a moment magnitude of 9. 1–9.3 and it was one of the deadliest natural disasters in recorded history. Indonesia was the country, followed by Sri Lanka, India. It is the third-largest earthquake ever recorded on a seismograph and had the longest duration of faulting ever observed and it caused the entire planet to vibrate as much as 1 centimetre and triggered other earthquakes as far away as Alaska. Its epicentre was between Simeulue and mainland Indonesia, the plight of the affected people and countries prompted a worldwide humanitarian response. In all, the community donated more than US$14 billion in humanitarian aid. The event is known by the community as the Sumatra–Andaman earthquake. The resulting tsunami was given names, including the 2004 Indian Ocean tsunami, South Asian tsunami, Indonesian tsunami, the Christmas tsunami. The tsunami was initially documented as moment magnitude 8.8, in February 2005 scientists revised the estimate of the magnitude to 9.0. Although the Pacific Tsunami Warning Center has accepted these new numbers, the most recent studies in 2006 have obtained a magnitude of Mw 9. 1–9.3. Dr. Hiroo Kanamori of the California Institute of Technology believes that Mw 9.2 is a representative value for the size of this great earthquake. The hypocentre of the earthquake was approximately 160 km off the western coast of northern Sumatra. The northern section of the Sunda megathrust ruptured over a length of 1,300 km, the earthquake was felt in Bangladesh, India, Malaysia, Myanmar, Thailand, Singapore and the Maldives. Splay faults, or secondary pop up faults, caused long and this quickly elevated the height and increased the speed of waves, causing the complete destruction of the nearby Indonesian town of Lhoknga. Of all the seismic moment released by earthquakes in the 100 years from 1906 through 2005 and this quake, together with the Good Friday earthquake and the Great Chilean earthquake, account for almost half of the total moment. The much smaller but still catastrophic 1906 San Francisco earthquake is included in the diagram for perspective, Mw denotes the magnitude of an earthquake on the moment magnitude scale. Since 1900 the only recorded with a greater magnitude were the 1960 Great Chilean earthquake. The only other recorded earthquakes of magnitude 9.0 or greater were off Kamchatka, Russia, on 4 November 1952 and Tōhoku, each of these megathrust earthquakes also spawned tsunamis in the Pacific Ocean
17.
Indian Plate
–
The Indian Plate or India Plate is a major tectonic plate straddling the equator in the eastern hemisphere. Originally a part of the ancient continent of Gondwana, India broke away from the fragments of Gondwana 100 million years ago. The Indian plate includes most of South Asia—i. e, until roughly 140 million years ago, the Indian Plate formed part of the supercontinent Gondwana together with modern Africa, Australia, Antarctica, and South America. Gondwana broke up as these continents drifted apart at different velocities, in the late Cretaceous, approximately 100 million years ago and subsequent to the splitting off from Gondwana of conjoined Madagascar and India, the Indian Plate split from Madagascar. It began moving north, at about 20 centimetres per year, however, some authors suggest that the collision between India and Eurasia occurred much later, around 35 million years ago. If the collision occurred between 55 and 50 Mya, the Indian Plate would have covered a distance of 3,000 to 2,000 kilometres, moving faster than any other known plate. These authors propose a continental fragment of northern Gondwana rifted from India, traveled northward and this was followed by the hard collision between India and Asia occurred at ~25 Ma. In 2007, German geologists suggested that the reason the Indian Plate moved so quickly is that it is half as thick as the other plates which formerly constituted Gondwana. The mantle plume that once broke up Gondwana might also have melted the part of the Indian subcontinent. The remains of this plume today form the Marion Hotspot, the Kerguelen hotspot, as India moved north, it is possible that the thickness of the Indian plate degenerated further as it passed over the hotspots and magmatic extrusions associated with the Deccan and Rajmahal Traps. The Indian Plate is currently moving north-east at 5 centimetres per year and this is causing the Eurasian Plate to deform, and the Indian Plate to compress at a rate of 4 millimetres per year. The westerly side of the Indian Plate is a boundary with the Arabian Plate called the Owen Fracture Zone. The northerly side of the Plate is a convergent boundary with the Eurasian Plate forming the Himalaya, List of tectonic plates List of tectonic plate interactions Paleogeography
18.
Burma Plate
–
The Burma Plate is a minor tectonic plate or microplate located in Southeast Asia, sometimes considered a part of the larger Eurasian Plate. The Andaman Islands, Nicobar Islands, and northwestern Sumatra are located on the plate and this island arc separates the Andaman Sea from the main Indian Ocean to the west. To its east lies the Sunda Plate, from which it is separated along a transform boundary, to the west is the much larger India Plate, which is subducting beneath the eastern facet of the Burma Plate. This extensive subduction zone has formed the Sunda Trench, as the India Plate drifted northwards at a relatively rapid rate of an average 16 cm/yr, it also rotated in an counterclockwise direction. As a result of movement and rotation, the convergence along the plates eastern boundary with Eurasia was at an oblique angle. On December 26,2004, a portion of the boundary between the Burma Plate and the Indian Plate slipped, causing the 2004 Indian Ocean earthquake. This megathrust earthquake had a moment magnitude of 9. 1–9.3 Mw. Over 1600 km of the boundary underwent thrust faulting and shifted up to 5 meters vertically and 11 meters horizontally and this rapid rise in the sea floor over such a short time generated a massive tsunami that killed approximately 229,800 people along the coast of the Indian Ocean. Curray, JR.2002 Chapman Conference on Continent – Ocean Interactions within the East Asian Marginal Seas, tectonics and History of the Andaman Sea Region. Pdf Paul, J. Burgmann, R. Gaur, V. K. Bilham, R. Larson, K. M. Ananda, M. B. Jade, S. Mukal, M. Anupama, T. S. Satyal, G. Kumar, D.2001 The motion and active deformation of India
19.
Strait of Malacca
–
The Strait of Malacca or Straits of Malacca is a narrow,550 mi stretch of water between the Malay Peninsula and the Indonesian island of Sumatra. It is named after the Malacca sultanate that ruled over the archipelago between 1400 and 1511, the International Hydrographic Organization defines the limits of the Strait of Malacca as follows, On the West. A line joining Pedropunt, the Northernmost point of Sumatra and Lem Voalan the Southern extremity of Goh Puket in Siam, a line joining Tanjong Piai, the Southern extremity of the Malay Peninsula and The Brothers and thence to Klein Karimoen. The Southwestern coast of the Malay Peninsula, the Northeastern coast of Sumatra as far to the eastward as Tanjong Kedabu thence to Klein Karimoen. From an economic and strategic perspective, the Strait of Malacca is one of the most important shipping lanes in the world. The strait is the shipping channel between the Indian Ocean and the Pacific Ocean, linking major Asian economies such as India, China, Japan, Taiwan. Over 94,000 vessels pass through the strait each year, carrying about one-fourth of the traded goods, including oil, Chinese manufactured products. About a quarter of all oil carried by sea passes through the Strait, in 2007, an estimated 13.7 million barrels per day were transported through the strait, increasing to an estimated 15.2 million barrels per day in 2011. In addition, it is one of the worlds most congested shipping choke points because it narrows to only 2.8 km wide at the Phillips Channel. The maximum size of a vessel that can pass through the Strait is referred to as Malaccamax, for some of the worlds largest ships, the Straits minimum depth isnt deep enough. In addition, the next closest passageway is even more shallow and narrow than Malacca, therefore, these large ships must detour several thousand miles/kilometers and use the Lombok Strait, Makassar Strait, Sibutu Passage, or Mindoro Strait instead. Piracy has been a problem in the strait, piracy had been high in the 2000s, with additional increase after the events of September 11,2001. After attacks rose again in the first half of 2004, regional navies stepped up their patrols of the area in July 2004, subsequently, attacks on ships in the Strait of Malacca dropped, to 79 in 2005 and 50 in 2006. Recent reports indicate that attacks have dropped to levels in recent years. There are 34 shipwrecks, some dating to the 1880s, in the Traffic Separation Scheme and these pose a collision hazard in the narrow and shallow strait. Another risk is the annual haze due to raging bush fires in Sumatra and it may reduce visibility to 200 metres, forcing ships to slow down in the busy strait. The strait is used by Ships longer than 350 metres. Thailand has developed plans to diminish the economic significance of the strait
20.
International Hydrographic Organization
–
The International Hydrographic Organization is the inter-governmental organisation representing hydrography. A principal aim of the IHO is to ensure that the seas, oceans. It does this through the setting of standards, the co-ordination of the endeavours of the worlds national hydrographic offices. The IHO enjoys observer status at the United Nations where it is the competent authority on hydrographic surveying. When referring to hydrography and nautical charting in Conventions and similar Instruments, it is the IHO standards, the IHO was established in 1921 as the International Hydrographic Bureau. The present name was adopted in 1970 as part of a new international Convention on the IHO adopted by the member nations. The former name International Hydrographic Bureau was retained to describe the IHO secretariat until 8 November 2016, there were substantial differences in hydrographic procedures charts, and publications. In 1889, an International Maritime Conference was held at Washington, D. C. similar proposals were made at the sessions of the International Congress of Navigation held at Saint Petersburg in 1908 and the International Maritime Conference held at Saint Petersburg in 1912. In 1919 the hydrographers of Great Britain and France cooperated in taking the steps to convene an international conference of hydrographers. London was selected as the most suitable place for this conference, and on 24 July 1919 and this is still the major purpose of the IHO. As a result of the conference, a permanent organization was formed, the IHB, now the IHO, began its activities in 1921 with 18 nations as members. The Principality of Monaco was selected as the seat of the organization as a result of the offer of Albert I, the IHO develops hydrographic and nautical charting standards. These standards are adopted and used by its 86 member countries and others in their surveys, nautical charts. Much has been done in the field of standardisation since the Bureau was founded, the IHO has encouraged the formation of Regional Hydrographic Commissions. Each RHC coordinates the national surveying and charting activities of countries within each region, the 15 RHCs plus the IHO Hydrographic Commission on Antarctica effectively cover the world. The IHO, in partnership with the Intergovernmental Oceanographic Commission, directs the General Bathymetric Chart of the Oceans programme, in 2010 the IHO introduced a new, contemporary hydrographic geospatial standard for modelling marine data and information, known as S-100. S-100 and any dependent product specifications are underpinned by an on-line registry accessible via the IHO website, S-100 is aligned with the ISO19100 series of geographic standards, thereby making it fully compatible with contemporary geospatial data standards. Because S-100 is based on ISO19100, it can be used by other providers for their maritime-related data
21.
Nicobar Islands
–
The Nicobar Islands are an archipelagic island chain in the eastern Indian Ocean and one of the most isolated in the world. They are located in Southeast Asia,150 km north of Aceh on Sumatra, located 1,300 km southeast of the Indian subcontinent, across the Bay of Bengal, they form part of the Union Territory of Andaman and Nicobar Islands, India. UNESCO has declared the Great Nicobar Island as one of the World Network of Biosphere Reserves, the Nicobar Islands cover a land area of 1,648.13 km2 and had a population of 36,844 at the 2011 Census. The Nicobar Islands are part of an island arc created by the collision of the Indo-Australian Plate with Eurasia. The climate is warm and tropical, with temperatures ranging from 22 to 30 °C, rainfall is heavy due to annual monsoons and measures around 3000 to 3800 mm each year. The vegetation of the Nicobars is typically divided into the mangrove forests. Additionally, several islands contain extensive inland grasslands, though these are thought to result from human intervention, the Nicobar Islands are recognised as a distinct terrestrial ecoregion, the Nicobar Islands rain forests, with many endemic species. The Nicobar Islands are believed to have inhabited for thousands of years. An indigenous tribe living at the tip of Great Nicobar, called the Shompen. The modern name is derived from the Chola dynasty name for the islands. Marco Polo also referred to this island as Necuverann, the history of organised European colonisation on the islands began with the Danish East India Company in 1754/56. Between 1778 and 1783, William Bolts attempted to establish an Austrian colony on the islands on the assumption that Denmark–Norway had abandoned its claims to the islands. Italy made an attempt at buying the Nicobar Islands from Denmark between 1864 and 1868, the Italian Minister of Agriculture and Commerce Luigi Torelli started a negotiation that looked promising, but failed due to the unexpected end of his Office and the first La Marmora Cabinet. The negotiations were interrupted and never brought up again, denmarks presence in the islands ended formally on 16 October 1868 when it sold the rights to the Nicobar Islands to Britain, which in 1869 made them part of British India. During World War II, the islands were occupied by Japan between 1942 and 1945, India occupied the Island after that, as its Territory. Together with the Andaman Islands, they became a territory of India in 1950. On 26 December 2004, the coast of the Nicobar Islands was devastated by a 10–15 m high tsunami following the 2004 Indian Ocean earthquake. At least 6,000 people were killed on the Andaman, several islands were heavily damaged with initial reports of islands broken in two or three pieces and coral reefs moved above water
22.
Andaman Islands
–
The Andaman Islands form an archipelago in the Bay of Bengal between India, to the west, and Myanmar, to the north and east. Most are part of the Andaman and Nicobar Islands Union Territory of India, while a number in the north of the archipelago, including the Coco Islands. The Andaman Islands are home to the Sentinelese, who have had no contact with any other people, the name of the Andaman Islands is ancient. A theory that became prevalent in the late 19th century is that it derives from Andoman, a form of Hanuman, another Italian traveller, Niccolò de Conti, mentioned the islands and said that the name means Island of Gold. The Andaman islands have been inhabited for several years, at the very least. The indigenous Andamanese people appear to have lived on the islands in substantial isolation from that time until the 18th century CE, from 800 to 1200 CE, the Tamil Chola dynasty created an empire that eventually extended from southeastern peninsular India to parts of Malaysia. Rajendra Chola I took over the Andaman and Nicobar Islands and maintained them as a naval base to launch a naval expedition against the Srivijaya empire. In 1789, Bengal Presidency established a base and penal colony on Chatham Island in the southeast bay of Great Andaman. The settlement is now known as Port Blair, after two years, the colony was moved to the northeast part of Great Andaman and was named Port Cornwallis after Admiral William Cornwallis. However, there was disease and death in the penal colony. In 1824, Port Cornwallis was the rendezvous of the carrying the army to the First Burmese War. In the 1830s and 1840s, shipwrecked crews who landed on the Andamans were often attacked and killed by the natives, in 1855, the government proposed another settlement on the islands, including a convict establishment, but the Indian Rebellion of 1857 forced a delay in its construction. However, because the rebellion gave the British so many prisoners, it made the new Andaman settlement and prison urgently necessary. Construction began in November 1857 at Port Blair using inmates labour,17 May 1859 was another major day for Andaman. The Battle of Aberdeen was fought between the Great Andamanese Tribe and the British, today, a memorial stands in Andaman Water sports complex as a tribute to the people who lost their life. Fearing foreign invasion and with help from a convict from Cellular Jail, the great Andamanese tribe stormed the British post. Later, it was identified that a convict named Doodnath had changed sides. Today, the tribe has been reduced to some 50 people, the government of Andaman Islands is making efforts to increase the headcount of this tribe
_of_A-SEA_in_2D_and_3D_(sectioned_along_95E).png)
_for_June_and_December.png)
_in_metres.png)
Andaman Sea travel guide from Wikivoyage
