124-531: (Redirected from Freebooters ) Freebooter may refer to: [REDACTED] Look up freebooter in Wiktionary, the free dictionary. Marine freebooters, or pirates Filibuster (military) , an individual who engages in unauthorized warfare against foreign countries Rapparee , the Irish usage Meadowbrook Freebooters , American polo team Freebooter (comics) ,
248-574: A century. More recently, pirates of the "golden age" were further stereotyped and popularized by the Pirates of the Caribbean film franchise, which began in 2003. The English word "pirate" is derived from the Latin pirata ("pirate, corsair, sea robber"), which comes from Greek πειρατής ( peiratēs ), "brigand", from πειράομαι (peiráomai), "I attempt", from πεῖρα ( peîra ), "attempt, experience". The meaning of
372-675: A companionship of privateers who later turned to piracy as the Likedeelers . They were especially noted for their leaders Klaus Störtebeker and Gödeke Michels . Until about 1440, maritime trade in both the North Sea , the Baltic Sea and the Gulf of Bothnia was seriously in danger of attack by the pirates. H. Thomas Milhorn mentions a certain Englishman named William Maurice, convicted of piracy in 1241, as
496-537: A few years later. In 264, the Goths reached Galatia and Cappadocia , and Gothic pirates landed on Cyprus and Crete . In the process, the Goths seized enormous booty and took thousands into captivity. In 286 AD, Carausius , a Roman military commander of Gaulish origins, was appointed to command the Classis Britannica , and given the responsibility of eliminating Frankish and Saxon pirates who had been raiding
620-553: A fictional character Freebooters F.C. , a former Irish football team A form of copyright infringement Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Freebooter . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Freebooter&oldid=1055403292 " Category : Disambiguation pages Hidden categories: Short description
744-462: A global rise in sea level. Sea level also increases in the Indian Ocean, except in the south tropical Indian Ocean where it decreases, a pattern most likely caused by rising levels of greenhouse gases . Among the tropical oceans, the western Indian Ocean hosts one of the largest concentrations of phytoplankton blooms in summer, due to the strong monsoon winds. The monsoonal wind forcing leads to
868-601: A lasting peace, while Tripoli was similarly coerced in 1686. In 1783 and 1784 the Spaniards bombarded Algiers in an effort to stem the piracy. The second time , Admiral Barceló damaged the city so severely that the Algerian Dey asked Spain to negotiate a peace treaty. From then on, Spanish vessels and coasts were safe for several years. Until the American Declaration of Independence in 1776, British treaties with
992-759: A legitimate response to the fact that their land was poor and it became their main source of income. The main victims of Maniot pirates were the Ottomans but the Maniots also targeted ships of European countries. Zaporizhian Sich was a pirate republic in Europe from the 16th through to the 18th century. Situated in Cossack territory in the remote steppe of Eastern Europe, it was populated with Ukrainian peasants that had run away from their feudal masters, outlaws, destitute gentry, run-away slaves from Turkish galleys , etc. The remoteness of
1116-723: A maximum depth of 7,290 m (23,920 ft). All of the Indian Ocean is in the Eastern Hemisphere and the centre of the Eastern Hemisphere, the 90th meridian east , passes through the Ninety East Ridge . Within these waters are a number of islands. These include those controlled by surrounding countries, and independent island states and territories. Of the non-coastal islands, there are two broad clusters: one around Madagascar, and one south of India. A few other oceanic islands are scattered elsewhere. In contrast to
1240-647: A part of Western pop culture . The two-volume A General History of the Pyrates , published in London in 1724, is generally credited with bringing key piratical figures and a semi-accurate description of their milieu in the " Golden Age of Piracy " to the public's imagination. The General History inspired and informed many later fictional depictions of piracy, most notably the novels Treasure Island (1883) and Peter Pan (1911), both of which have been adapted and readapted for stage, film, television, and other media across over
1364-463: A period of six years, except for debris that gets indefinitely stuck in the centre of the gyre. The garbage patch in the Indian Ocean will, according to a 2012 study, decrease in size after several decades to vanish completely over centuries. Over several millennia, however, the global system of garbage patches will accumulate in the North Pacific. There are two amphidromes of opposite rotation in
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#17328485120081488-787: A process of aridification began in the southwest Indian Ocean began around 4,000 years ago. Mammalian megafauna once widespread in the MPA was driven to near extinction in the early 20th century. Some species have been successfully recovered since then — the population of white rhinoceros ( Ceratotherium simum simum ) increased from less than 20 individuals in 1895 to more than 17,000 as of 2013. Other species still depend on fenced areas and management programs, including black rhinoceros ( Diceros bicornis minor ), African wild dog ( Lycaon pictus ), cheetah ( Acynonix jubatus ), elephant ( Loxodonta africana ), and lion ( Panthera leo ). This biodiversity hotspot (and namesake ecoregion and "Endemic Bird Area")
1612-504: A significant portion of the world's tuna catch and is home to endangered marine species. It faces challenges like overfishing and pollution , including a significant garbage patch . Historically, the Indian Ocean has been a hub of cultural and commercial exchange since ancient times. It played a key role in early human migrations and the spread of civilizations. In modern times, it remains crucial for global trade, especially in oil and hydrocarbons. Environmental and geopolitical concerns in
1736-419: A smaller type than battle galleys, often referred to as galiots or fustas . Pirate galleys were small, nimble, lightly armed, but often crewed in large numbers in order to overwhelm the often minimal crews of merchant ships. In general, pirate craft were extremely difficult for patrolling craft to actually hunt down and capture. Anne Hilarion de Tourville , a French admiral of the 17th century, believed that
1860-419: A state government . Piracy or pirating is the name of a specific crime under customary international law and also the name of a number of crimes under the municipal law of a number of states. In the 21st century , seaborne piracy against transport vessels remains a significant issue, with estimated worldwide losses of US$ 25 billion in 2023, increased from US$ 16 billion in 2004. The waters between
1984-464: A strong coastal and open ocean upwelling , which introduces nutrients into the upper zones where sufficient light is available for photosynthesis and phytoplankton production. These phytoplankton blooms support the marine ecosystem, as the base of the marine food web, and eventually the larger fish species. The Indian Ocean accounts for the second-largest share of the most economically valuable tuna catch. Its fish are of great and growing importance to
2108-665: A tribe called the Narentines revived the old Illyrian piratical habits and often raided the Adriatic Sea starting in the 7th century. Their raids in the Adriatic increased rapidly, until the whole Sea was no longer safe for travel. The Narentines took more liberties in their raiding quests while the Venetian Navy was abroad, as when it was campaigning in Sicilian waters in 827–882. As soon as
2232-615: A year of capture, most of the captives of the Iranun and Banguingui would be bartered off in Jolo usually for rice, opium, bolts of cloth, iron bars, brassware, and weapons. The buyers were usually Tausug datu from the Sultanate of Sulu who had preferential treatment, but buyers also included European ( Dutch and Portuguese ) and Chinese traders as well as Visayan pirates ( renegados ). Spanish authorities and native Christian Filipinos responded to
2356-464: Is a patchwork of small forested areas, often with a unique assemblage of species within each, located within 200 km (120 mi) from the coast and covering a total area of c. 6,200 km (2,400 sq mi). It also encompasses coastal islands, including Zanzibar and Pemba, and Mafia. This area, one of the only two hotspots that are entirely arid, includes the Ethiopian Highlands ,
2480-619: Is approximately 30° north in the Persian Gulf . The Indian Ocean covers 70,560,000 km (27,240,000 sq mi), including the Red Sea and the Persian Gulf but excluding the Southern Ocean, or 19.5% of the world's oceans; its volume is 264,000,000 km (63,000,000 cu mi) or 19.8% of the world's oceans' volume; it has an average depth of 3,741 m (12,274 ft) and
2604-739: Is artificially connected to the Mediterranean Sea without ship lock through the Suez Canal , which is accessible via the Red Sea. The Arabian Sea is connected to the Persian Gulf by the Gulf of Oman and the Strait of Hormuz . In the Persian Gulf, the Gulf of Bahrain separates Qatar from the Arabic Peninsula. Along the west coast of India, the Gulf of Kutch and Gulf of Khambat are located in Gujarat in
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#17328485120082728-467: Is different from Wikidata All article disambiguation pages All disambiguation pages Piracy Piracy is an act of robbery or criminal violence by ship or boat-borne attackers upon another ship or a coastal area, typically with the goal of stealing cargo and other valuable goods. Those who conduct acts of piracy are called pirates , and vessels used for piracy are called pirate ships . The earliest documented instances of piracy were in
2852-475: Is facing many challenges in bringing modern pirates to justice , as these attacks often occur in international waters . Nations have used their naval forces to repel and pursue pirates, and some private vessels use armed security guards, high-pressure water cannons , or sound cannons to repel boarders, and use radar to avoid potential threats. Romanticised accounts of piracy during the Age of Sail have long been
2976-464: Is projected to push the tropical Indian Ocean into a basin-wide near-permanent heatwave state by the end of the 21st century, where marine heatwaves are projected to increase from 20 days per year (during 1970–2000) to 220–250 days per year. South of the Equator (20–5°S), the Indian Ocean is gaining heat from June to October, during the austral winter, while it is losing heat from November to March, during
3100-714: The Andaman Sea , the Arabian Sea , the Bay of Bengal , and the Laccadive Sea . Once called the Eastern Ocean, it is now named after India , which protrudes into it, and has been known by its current name since at least 1515. It is the only ocean named after a country. It has an average depth of 3,741 m. All of the Indian Ocean is in the Eastern Hemisphere . Unlike the Atlantic and Pacific,
3224-711: The Arabian Peninsula in the Northern Hemisphere and north of the trade winds in the Southern Hemisphere. The Indonesian Throughflow is a unique Equatorial connection to the Pacific. 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 and west winds prevail. In the Arabian Sea, the violent Monsoon brings rain to
3348-759: The Arabs . In 846, the Narentines broke through to Venice itself and raided its lagoon city of Caorle . This caused a Byzantine military action against them that brought Christianity to them. After the Arab raids on the Adriatic coast circa 872 and the retreat of the Imperial Navy, the Narentines continued their raids of Venetian waters, causing new conflicts with the Italians in 887–888. The Venetians futilely continued to fight them throughout
3472-759: The Congress of Aix-la-Chapelle in 1818. In 1820, another British fleet under Admiral Sir Harry Neal again bombarded Algiers. Corsair activity based in Algiers did not entirely cease until its conquest by France in 1830 . In thalassocratic Austronesian cultures in Island Southeast Asia , maritime raids for slaves and resources against rival polities have ancient origins. It was associated with prestige and prowess and often recorded in tattoos. Reciprocal raiding traditions were recorded by early European cultures as being prevalent throughout Island Southeast Asia. With
3596-619: The Dodecanese islet of Pharmacusa . The Senate invested the general Gnaeus Pompeius Magnus with powers to deal with piracy in 67 BC (the Lex Gabinia ), and Pompey, after three months of naval warfare, managed to suppress the threat . As early as 258 AD, the Gothic - Herulic fleet ravaged towns on the coasts of the Black Sea and Sea of Marmara . The Aegean coast suffered similar attacks
3720-560: The East African Rift valley , the Socotra islands, as well as some small islands in the Red Sea and areas on the southern Arabic Peninsula. Endemic and threatened mammals include the dibatag ( Ammodorcas clarkei ) and Speke's gazelle ( Gazella spekei ); the Somali wild ass ( Equus africanus somaliensis ) and hamadryas baboon ( Papio hamadryas ). It also contains many reptiles. In Somalia,
3844-519: The Gulf of Aden , and the English Channel , whose geographic structures facilitated pirate attacks. The term piracy generally refers to maritime piracy, although the term has been generalized to refer to acts committed on land, in the air, on computer networks , and (in science fiction) outer space. Piracy usually excludes crimes committed by the perpetrator on their own vessel (e.g. theft), as well as privateering , which implies authorization by
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3968-608: The Malacca , Sunda and Torres Straits . The Gulf of Carpentaria is located on the Australian north coast while the Great Australian Bight constitutes a large part of its southern coast. Several features make the Indian Ocean unique. It constitutes the core of the large-scale Tropical Warm Pool which, when interacting with the atmosphere, affects the climate both regionally and globally. Asia blocks heat export and prevents
4092-773: The Mascarene Basin the CDW becomes a deep western boundary current before it is met by a re-circulated branch of itself, the North Indian Deep Water. This mixed water partly flows north into the Somali Basin whilst most of it flows clockwise in the Mascarene Basin where an oscillating flow is produced by Rossby waves . Water circulation in the Indian Ocean is dominated by the Subtropical Anticyclonic Gyre,
4216-580: The North African states protected American ships from the Barbary corsairs. Morocco , which in 1777 was the first independent nation to publicly recognize the United States , became in 1784 the first Barbary power to seize an American vessel after independence. While the United States managed to secure peace treaties, these obliged it to pay tribute for protection from attack. Payments in ransom and tribute to
4340-661: The Ottoman Sultan to flee his palace. Don Cossacks under Stenka Razin even ravaged the Persian coasts. Though less famous and romanticized than Atlantic or Caribbean pirates, corsairs in the Mediterranean equaled or outnumbered the former at any given point in history. Mediterranean piracy was conducted almost entirely with galleys until the mid-17th century, when they were gradually replaced with highly maneuverable sailing vessels such as xebecs and brigantines . They were of
4464-646: The Philippines after 1565. These slaves were taken from piracy on passing ships as well as coastal raids on settlements as far as the Malacca Strait , Java , the southern coast of China and the islands beyond the Makassar Strait . Most of the slaves were Tagalogs , Visayans , and "Malays" (including Bugis , Mandarese , Iban , and Makassar ). There were also occasional European and Chinese captives who were usually ransomed off through Tausug intermediaries of
4588-561: The Qing period, Chinese pirate fleets grew increasingly large. The effects large-scale piracy had on the Chinese economy were immense. They preyed voraciously on China's junk trade, which flourished in Fujian and Guangdong and was a vital artery of Chinese commerce. Pirate fleets exercised hegemony over villages on the coast, collecting revenue by exacting tribute and running extortion rackets. In 1802,
4712-526: The Red Sea and the Indian Ocean , off the Somali coast and in the Strait of Malacca and Singapore have frequently been targeted by modern pirates armed with automatic weapons, such as assault rifles , and machine guns, grenades and rocket propelled grenades . They often use small motorboats to attack and board ships, a tactic that takes advantage of the small number of crew members on modern cargo vessels and transport ships. The international community
4836-741: The Roman Republic . It was not until 229 BC when the Romans decisively beat the Illyrian fleets that their threat was ended. During the 1st century BC, there were pirate states along the Anatolian coast, threatening the commerce of the Roman Empire in the eastern Mediterranean. On one voyage across the Aegean Sea in 75 BC, Julius Caesar was kidnapped and briefly held by Cilician pirates and held prisoner in
4960-422: The Sea of Zanj is located north of Madagascar. On the northern coast of the Arabian Sea , Gulf of Aden is connected to the Red Sea by the strait of Bab-el-Mandeb . In the Gulf of Aden, the Gulf of Tadjoura is located in Djibouti and the Guardafui Channel separates Socotra island from the Horn of Africa. The northern end of the Red Sea terminates in the Gulf of Aqaba and Gulf of Suez . The Indian Ocean
5084-406: The Sulu Sea : the Sultanate of Sulu , the Sultanate of Maguindanao , and the Confederation of Sultanates in Lanao (the modern Moro people ). It is estimated that from 1770 to 1870, around 200,000 to 300,000 people were enslaved by Iranun and Banguingui slavers. David P. Forsythe put the estimate much higher, at around 2 million slaves captured within the first two centuries of Spanish rule of
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5208-410: The Sulu Sultanate . Slaves were the primary indicators of wealth and status, and they were the source of labor for the farms, fisheries, and workshops of the sultanates. While personal slaves were rarely sold, they trafficked extensively in slaves purchased from the Iranun and Banguingui slave markets . By the 1850s, slaves constituted 50% or more of the population of the Sulu archipelago. The scale
5332-413: The Yellow Sea . Heungdeok agreed and in 828 formally established the Cheonghae ( 淸海 , "clear sea") Garrison ( 청해진 ) at what is today Wando island off Korea's South Jeolla province. Heungdeok gave Jang an army of 10,000 men to establish and man the defensive works. The remnants of Cheonghae Garrison can still be seen on Jang islet just off Wando's southern coast. Jang's force, though nominally bequeathed by
5456-432: The runoff water to the Indian Ocean. Mainly in summer, this runoff flows into the Arabian Sea but also south across the Equator where it mixes with fresher seawater from the Indonesian Throughflow . This mixed freshwater joins the South Equatorial Current in the southern tropical Indian Ocean. Sea surface salinity is highest (more than 36 PSU ) in the Arabian Sea because evaporation exceeds precipitation there. In
5580-423: The "Hinge zone may represent the relict of continental and proto-oceanic crustal boundary formed during the rifting of India from Antarctica ." Australia, Indonesia, and India are the three countries with the longest shorelines and exclusive economic zones . The continental shelf makes up 15% of the Indian Ocean. More than two billion people live in countries bordering the Indian Ocean, compared to 1.7 billion for
5704-454: The 10th and 11th centuries. Domagoj was accused of attacking a ship which was bringing home the papal legates who had participated in the Eighth Catholic Ecumenical Council , after which Pope John VIII addresses to Domagoj with request that his pirates stop attacking Christians at sea. In 937, Irish pirates sided with the Scots, Vikings, Picts , and Welsh in their invasion of England. Athelstan drove them back. The Slavic piracy in
5828-409: The 14th century BC, when the Sea Peoples , a group of ocean raiders, attacked the ships of the Aegean and Mediterranean civilisations. Narrow channels which funnel shipping into predictable routes have long created opportunities for piracy, as well as for privateering and commerce raiding . Historic examples of such areas include the waters of Gibraltar , the Strait of Malacca , Madagascar ,
5952-443: The 15th century called it the Western Oceans. In Ancient Greek geography , the Indian Ocean region known to the Greeks was called the Erythraean Sea . The borders of the Indian Ocean , as delineated by the International Hydrographic Organization in 1953 included the Southern Ocean but not the marginal seas along the northern rim but in 2002 the IHO delimited the Southern Ocean separately, which removed waters south of 60°s from
6076-442: The 17th century. France encouraged the corsairs against Spain, and later Britain and Holland supported them against France. By the second half of the 17th century the greater European naval powers began to initiate reprisals to intimidate the Barbary States into making peace with them. The most successful of the Christian states in dealing with the corsair threat was England. From the 1630s onwards England had signed peace treaties with
6200-413: The Arabian Peninsula) and Limpopo rivers. After the breakup of East Gondwana and the formation of the Himalayas, the Ganges-Brahmaputra rivers flow into the world's largest delta known as the Bengal delta or Sunderbans . Marginal seas , gulfs, bays and straits of the Indian Ocean include: Along the east coast of Africa, the Mozambique Channel separates Madagascar from mainland Africa, while
6324-423: The Atlantic and 2.7 billion for the Pacific (some countries border more than one ocean). The Indian Ocean drainage basin covers 21,100,000 km (8,100,000 sq mi), virtually identical to that of the Pacific Ocean and half that of the Atlantic basin, or 30% of its ocean surface (compared to 15% for the Pacific). The Indian Ocean drainage basin is divided into roughly 800 individual basins, half that of
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#17328485120086448-482: The Atlantic and Pacific, the Indian Ocean is enclosed by major landmasses and an archipelago on three sides and does not stretch from pole to pole, and can be likened to an embayed ocean. It is centered on the Indian Peninsula. Although this subcontinent has played a significant role in its history, the Indian Ocean has foremostly been a cosmopolitan stage, interlinking diverse regions by innovations, trade, and religion since early in human history. The active margins of
6572-405: The Atlantic and struck as far north as Iceland. According to Robert Davis between 1 million and 1.25 million Europeans were captured by Barbary corsairs and sold as slaves in North Africa and the Ottoman Empire between the 16th and 19th centuries. The most famous corsairs were the Ottoman Albanian Hayreddin and his older brother Oruç Reis (Redbeard), Turgut Reis (known as Dragut in
6696-405: The Baltic Sea ended with the Danish conquest of the Rani stronghold of Arkona in 1168. In the 12th century the coasts of western Scandinavia were plundered by Curonians and Oeselians from the eastern coast of the Baltic Sea. In the 13th and 14th century, pirates threatened the Hanseatic routes and nearly brought sea trade to the brink of extinction. The Victual Brothers of Gotland were
6820-429: The Barbary States on various occasions, but invariably breaches of these agreements led to renewed wars. Albanian piracy , mainly centered in the town of Ulcinj (thus came to be known as Dulcignotti ), flourished during the 15th to the 19th century. France, which had recently emerged as a leading naval power, achieved comparable success soon afterwards, with bombardments of Algiers in 1682, 1683 and 1688 securing
6944-484: The Barbary states amounted to 20% of United States government annual expenditures in 1800, leading to the Barbary Wars that ended the payment of tribute. Algiers broke the 1805 peace treaty after only two years, and refused to implement the 1815 treaty until compelled to do so by Britain in 1816. In 1815, the sacking of Palma on the island of Sardinia by a Tunisian squadron, which carried off 158 inhabitants, roused widespread indignation. Britain had by this time banned
7068-462: The Comoros. Although both species represent an order of lobe-finned fishes known from the Early Devonian (410 mya ) and though extinct 66 mya, they are morphologically distinct from their Devonian ancestors. Over millions of years, coelacanths evolved to inhabit different environments — lungs adapted for shallow, brackish waters evolved into gills adapted for deep marine waters. Of Earth's 36 biodiversity hotspots nine (or 25%) are located on
7192-403: The East India Coastal Current to the Arabian Sea from January to April. An Indian Ocean garbage patch was discovered in 2010 covering at least 5 million square kilometres (1.9 million square miles). Riding the southern Indian Ocean Gyre , this vortex of plastic garbage constantly circulates the ocean from Australia to Africa, down the Mozambique Channel , and back to Australia in
7316-412: The Greek word peiratēs literally is "anyone who attempts something". Over time it came to be used of anyone who engaged in robbery or brigandry on land or sea. The term first appeared in English c. 1300. Spelling did not become standardised until the eighteenth century, and spellings such as "pirrot", "pyrate" and "pyrat" occurred until this period. The earliest documented instances of piracy are
7440-411: The Indian Ocean but included the northern marginal seas. Meridionally , the Indian Ocean is delimited from the Atlantic Ocean by the 20° east meridian , running south from Cape Agulhas , South Africa, and from the Pacific Ocean by the meridian of 146°49'E, running south from South East Cape on the island of Tasmania in Australia. The northernmost extent of the Indian Ocean (including marginal seas)
7564-405: The Indian Ocean have an average width (horizontal distance from land to shelf break ) of 19 ± 0.61 km (11.81 ± 0.38 mi) with a maximum width of 175 km (109 mi). The passive margins have an average width of 47.6 ± 0.8 km (29.58 ± 0.50 mi). The average width of the slopes (horizontal distance from shelf break to foot of slope) of
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#17328485120087688-457: The Indian Ocean includes beaches and intertidal zones covering 3,000 km (1,200 sq mi) and 246 larger estuaries . Upwelling areas are small but important. The hypersaline salterns in India covers between 5,000–10,000 km (1,900–3,900 sq mi) and species adapted for this environment, such as Artemia salina and Dunaliella salina , are important to bird life. Coral reefs, sea grass beds, and mangrove forests are
7812-445: The Indian Ocean is bordered by landmasses and an archipelago on three sides, making it more like an embayed ocean centered on the Indian Peninsula. Its coasts and shelves differ from other oceans, with distinct features, such as a narrower continental shelf . In terms of geology, the Indian Ocean is the youngest of the major oceans, with active spreading ridges and features like seamounts and ridges formed by hotspots . The climate of
7936-432: The Indian Ocean is characterized by monsoons . It is the warmest ocean, with a significant impact on global climate due to its interaction with the atmosphere. Its waters are affected by the Indian Ocean Walker circulation , resulting in unique oceanic currents and upwelling patterns. The Indian Ocean is ecologically diverse, with important marine life and ecosystems like coral reefs, mangroves, and sea grass beds. It hosts
8060-424: The Indian Ocean region, or almost half of the world's mangrove habitat, of which 42,500 km (16,400 sq mi) is located in Indonesia, or 50% of mangroves in the Indian Ocean. Mangroves originated in the Indian Ocean region and have adapted to a wide range of its habitats but it is also where it suffers its biggest loss of habitat. In 2016, six new animal species were identified at hydrothermal vents in
8184-666: The Indian Ocean, during the past six decades. The tuna catch rates have also declined 50–90% during the past half-century, mostly due to increased industrial fisheries, with the ocean warming adding further stress to the fish species. Endangered and vulnerable marine mammals and turtles: 80% of the Indian Ocean is open ocean and includes nine large marine ecosystems : the Agulhas Current , Somali Coastal Current , Red Sea , Arabian Sea , Bay of Bengal , Gulf of Thailand , West Central Australian Shelf , Northwest Australian Shelf and Southwest Australian Shelf . Coral reefs cover c. 200,000 km (77,000 sq mi). The coasts of
8308-432: The Indian Ocean, probably caused by Rossby wave propagation. Icebergs drift as far north as 55° south latitude , similar to the Pacific but less than in the Atlantic where icebergs reach up to 45°S. The volume of iceberg loss in the Indian Ocean between 2004 and 2012 was 24 Gt . Since the 1960s, anthropogenic warming of the global ocean combined with contributions of freshwater from retreating land ice causes
8432-411: The Indian Ocean. While the Indian Ocean warmed at a rate of 1.2°C per century during 1950–2020, climate models predict accelerated warming, at a rate of 1.7 °C–3.8 °C per century during 2020–2100. Though the warming is basin-wide, maximum warming is in the northwestern Indian Ocean including the Arabian Sea, and reduced warming off the Sumatra and Java coasts in the southeast Indian Ocean. Global warming
8556-401: The Indian subcontinent. In the southern hemisphere, the winds are generally milder, but summer storms near Mauritius can be severe. When the monsoon winds change, cyclones sometimes strike the shores of the Arabian Sea and the Bay of Bengal . Some 80% of the total annual rainfall in India occurs during summer and the region is so dependent on this rainfall that many civilisations perished when
8680-408: The Monsoon failed in the past. The huge variability in the Indian Summer Monsoon has also occurred pre-historically, with a strong, wet phase 33,500–32,500 BP; a weak, dry phase 26,000–23,500 BC; and a very weak phase 17,000–15,000 BP, corresponding to a series of dramatic global events: Bølling–Allerød warming , Heinrich , and Younger Dryas . The Indian Ocean is the warmest ocean in
8804-434: The Moro raiders and could give chase. As resistance against raiders increased, Lanong warships of the Iranun were eventually replaced by the smaller and faster garay warships of the Banguingui in the early 19th century. The Moro raids were eventually subdued by several major naval expeditions by the Spanish and local forces from 1848 to 1891, including retaliatory bombardment and capture of Moro settlements. By this time,
8928-669: The Moro slave raids by building watchtowers and forts across the Philippine archipelago, many of which are still standing today. Some provincial capitals were also moved further inland. Major command posts were built in Manila , Cavite , Cebu , Iloilo , Zamboanga , and Iligan . Defending ships were also built by local communities, especially in the Visayas Islands , including the construction of war " barangayanes " ( balangay ) that were faster than
9052-645: The Pacific, of which 50% are located in Asia, 30% in Africa, and 20% in Australasia. The rivers of the Indian Ocean are shorter on average (740 km (460 mi)) than those of the other major oceans. The largest rivers are ( order 5 ) the Zambezi , Ganges - Brahmaputra , Indus , Jubba , and Murray rivers and (order 4) the Shatt al-Arab , Wadi Ad Dawasir (a dried-out river system on
9176-758: The Qing navy. However, a combination of famine, Qing naval opposition, and internal rifts crippled piracy in China around the 1820s, and it has never again reached the same status. In the 1840s and 1850s, United States Navy and Royal Navy forces campaigned together against Chinese pirates. Major battles were fought such as those at Ty-ho Bay and the Tonkin River though pirate junks continued operating off China for years more. However, some British and American individual citizens also volunteered to serve with Chinese pirates to fight against European forces. The British offered rewards for
9300-631: The Silla king, was effectively under his own control. Jang became arbiter of Yellow Sea commerce and navigation. From the 13th century, Wokou based in Japan made their debut in East Asia, initiating invasions that would persist for 300 years. The wokou raids peaked in the 1550s , but by then the wokou were mostly Chinese smugglers who reacted strongly against the Ming dynasty 's strict prohibition on private sea trade. During
9424-602: The Southeast Arabian Sea salinity drops to less than 34 PSU. It is the lowest (c. 33 PSU) in the Bay of Bengal because of river runoff and precipitation. The Indonesian Throughflow and precipitation results in lower salinity (34 PSU) along the Sumatran west coast. Monsoonal variation results in eastward transportation of saltier water from the Arabian Sea to the Bay of Bengal from June to September and in westerly transport by
9548-536: The Southwest Indian Ridge, from where it continues into the Mozambique Channel and Prince Edward Fracture Zone . North of 20° south latitude the minimum surface temperature is 22 °C (72 °F), exceeding 28 °C (82 °F) to the east. Southward of 40° south latitude , temperatures drop quickly. The Bay of Bengal contributes more than half (2,950 km or 710 cu mi) of
9672-516: The Southwest Indian Ridge: a "Hoff" crab, a "giant peltospirid" snail, a whelk-like snail, a limpet, a scaleworm and a polychaete worm. The West Indian Ocean coelacanth was discovered in the Indian Ocean off South Africa in the 1930s and in the late 1990s another species, the Indonesian coelacanth , was discovered off Sulawesi Island , Indonesia. Most extant coelacanths have been found in
9796-561: The Spanish had also acquired steam gunboats ( vapor ), which could easily overtake and destroy the native Moro warships. Aside from the Iranun and Banguingui pirates, other polities were also associated with maritime raiding. The Bugis sailors of South Sulawesi were infamous as pirates who used to range as far west as Singapore and as far north as the Philippines in search of targets for piracy. The Orang laut pirates controlled shipping in
9920-557: The Straits of Malacca and the waters around Singapore, and the Malay and Sea Dayak pirates preyed on maritime shipping in the waters between Singapore and Hong Kong from their haven in Borneo . In East Asia by the ninth century, populations centered mostly around merchant activities in coastal Shandong and Jiangsu . Wealthy benefactors including Jang Bogo established Silla Buddhist temples in
10044-479: The Tunisian coast were brutally treated without his knowledge. As Sardinians they were technically under British protection and the government sent Exmouth back to secure reparation. On August 17, in combination with a Dutch squadron under Admiral Van de Capellen, he bombarded Algiers. Both Algiers and Tunis made fresh concessions as a result. Securing uniform compliance with a total prohibition of slave-raiding, which
10168-588: The Venetian fleet would return to the Adriatic, the Narentines momentarily outcast their habits again, even signing a Treaty in Venice and baptising their Slavic pagan leader into Christianity. In 834 or 835 they broke the treaty and again they raided Venetian traders returning from Benevento. All of Venice's military attempts to punish them in 839 and 840 utterly failed. Later, they raided the Venetians more often, together with
10292-750: The West), Kurtoglu (known as Curtogoli in the West), Kemal Reis , Salih Reis and Koca Murat Reis . A few Barbary corsairs, such as the Dutch Jan Janszoon and the English John Ward (Muslim name Yusuf Reis), were renegade European privateers who had converted to Islam. The Barbary pirates had a direct Christian counterpart in the military order of the Knights of Saint John that operated first out of Rhodes and after 1530 Malta , though they were less numerous and took fewer slaves. Both sides waged war against
10416-631: The advent of Islam and the colonial era , slaves became a valuable resource for trading with European, Arab, and Chinese slavers, and the volume of piracy and slave raids increased significantly. Numerous native peoples engaged in sea raiding; they include the Iranun and Balanguingui slavers of Sulu , the Iban headhunters of Borneo , the Bugis sailors of South Sulawesi , and the Malays of western Southeast Asia. Piracy
10540-722: The austral summer. In 1999, the Indian Ocean Experiment showed that fossil fuel and biomass burning in South and Southeast Asia caused air pollution (also known as the Asian brown cloud ) that reach as far as the Intertropical Convergence Zone . This pollution has implications on both a local and global scale. Forty percent of the sediment of the Indian Ocean is found in the Indus and Ganges fans. The oceanic basins adjacent to
10664-400: The bordering countries for domestic consumption and export. Fishing fleets from Russia, Japan, South Korea , and Taiwan also exploit the Indian Ocean, mainly for shrimp and tuna. Research indicates that increasing ocean temperatures are taking a toll on the marine ecosystem. A study on the phytoplankton changes in the Indian Ocean indicates a decline of up to 20% in the marine plankton in
10788-582: The capture of westerners serving with Chinese pirates. During the Second Opium War and the Taiping Rebellion , piratical junks were again destroyed in large numbers by British naval forces but ultimately it was not until the 1860s and 1870s that fleets of pirate junks ceased to exist. Chinese Pirates also plagued the Tonkin Gulf area. Indian Ocean The Indian Ocean is the third-largest of
10912-686: The centre of the 1,500,000 km (580,000 sq mi) hotspot, the landscape is dominated by Acacia - Commiphora deciduous bushland, but also includes the Yeheb nut ( Cordeauxia edulus ) and species discovered more recently such as the Somali cyclamen ( Cyclamen somalense ), the only cyclamen outside the Mediterranean. Warsangli linnet ( Carduelis johannis ) is an endemic bird found only in northern Somalia. An unstable political situation and mismanagement has resulted in overgrazing which has produced one of
11036-607: The coasts of Armorica and Belgic Gaul . In the Roman province of Britannia, Saint Patrick was captured and enslaved by Irish pirates. The most widely recognized and far-reaching pirates in medieval Europe were the Vikings , seaborne warriors from Scandinavia who raided and looted mainly between the 8th and 12th centuries, during the Viking Age in the Early Middle Ages . They raided
11160-720: The coasts, rivers and inland cities of all Western Europe as far as Seville , which was attacked by the Norse in 844. Vikings also attacked the coasts of North Africa and Italy and plundered all the coasts of the Baltic Sea . Some Vikings ascended the rivers of Eastern Europe as far as the Black Sea and Persia. In the Late Middle Ages, the Frisian pirates known as Arumer Zwarte Hoop led by Pier Gerlofs Donia and Wijerd Jelckama , fought against
11284-496: The continental shelves are 50.4–52.4 km (31.3–32.6 mi) for active and passive margins respectively, with a maximum width of 205.3–255.2 km (127.6–158.6 mi). In correspondence of the Shelf break , also known as Hinge zone, the Bouguer gravity ranges from 0 to 30 mGals that is unusual for a continental region of around 16 km thick sediments. It has been hypothesized that
11408-541: The continental slopes mostly contain terrigenous sediments. The ocean south of the polar front (roughly 50° south latitude ) is high in biologic productivity and dominated by non-stratified sediment composed mostly of siliceous oozes . Near the three major mid-ocean ridges the ocean floor is relatively young and therefore bare of sediment, except for the Southwest Indian Ridge due to its ultra-slow spreading rate. The ocean's currents are mainly controlled by
11532-602: The eastern extension of which is blocked by the Southeast Indian Ridge and the 90°E Ridge. Madagascar and the Southwest Indian Ridge separate three cells south of Madagascar and off South Africa. North Atlantic Deep Water reaches into the Indian Ocean south of Africa at a depth of 2,000–3,000 m (6,600–9,800 ft) and flows north along the eastern continental slope of Africa. Deeper than NADW, Antarctic Bottom Water flows from Enderby Basin to Agulhas Basin across deep channels (<4,000 m (13,000 ft)) in
11656-789: The exploits of the Sea Peoples who threatened the ships sailing in the Aegean and Mediterranean waters in the 14th century BC. In classical antiquity , the Phoenicians , Illyrians and Tyrrhenians were known as pirates. In the pre-classical era, the ancient Greeks condoned piracy as a viable profession; it apparently was widespread and "regarded as an entirely honourable way of making a living". References are made to its perfectly normal occurrence in many texts including in Homer's Iliad and Odyssey , and abduction of women and children to be sold into slavery
11780-532: The first person known to have been hanged, drawn and quartered , which would indicate that the then-ruling King Henry III took an especially severe view of this crime. The ushkuiniks were Novgorodian pirates who looted the cities on the Volga and Kama Rivers in the 14th century. As early as Byzantine times, the Maniots (one of Greece's toughest populations) were known as pirates. The Maniots considered piracy as
11904-580: The islands of the Indian Ocean are textbook cases of evolutionary processes; the dung beetles , day geckos , and lemurs are all examples of adaptive radiation . Many bones (250 bones per square metre) of recently extinct vertebrates have been found in the Mare aux Songes swamp in Mauritius, including bones of the Dodo bird ( Raphus cucullatus ) and Cylindraspis giant tortoise. An analysis of these remains suggests
12028-641: The lower decks, like the James Galley and Charles Galley , and oar-equipped sloops proved highly useful for pirate hunting, though they were not built in sufficient numbers to check piracy until the 1720s. The expansion of Muslim power through the Ottoman conquest of large parts of the eastern Mediterranean in the 15th and 16th century resulted in extensive piracy on sea trading. The so-called Barbary pirates began to operate out of North African ports in Algiers, Tunis, Tripoli, Morocco around 1500, preying primarily on
12152-481: The margins of the Indian Ocean. The origin of this diversity is debated; the break-up of Gondwana can explain vicariance older than 100 mya, but the diversity on the younger, smaller islands must have required a Cenozoic dispersal from the rims of the Indian Ocean to the islands. A "reverse colonisation", from islands to continents, apparently occurred more recently; the chameleons , for example, first diversified on Madagascar and then colonised Africa. Several species on
12276-458: The menacing Zheng Yi inherited the fleet of his cousin, captain Zheng Qi, whose death provided Zheng Yi with considerably more influence in the world of piracy. Zheng Yi and his wife, Zheng Yi Sao (who would eventually inherit the leadership of his pirate confederacy) then formed a pirate coalition that, by 1804, consisted of over ten thousand men. Their military might alone was sufficient to combat
12400-568: The mid-18th century, as opposed to the Western Ocean ( Atlantic ) before the Pacific was surmised. In modern times, the name Afro-Asian Ocean has occasionally been used. The Hindi name for the Ocean is हिंद महासागर ( Hind Mahāsāgar ; lit. transl. Ocean of India ). Conversely, Chinese explorers (e.g., Zheng He during the Ming dynasty ) who traveled to the Indian Ocean during
12524-457: The monsoon. Two large gyres , one in the northern hemisphere flowing clockwise and one south of the equator moving anticlockwise (including the Agulhas Current and Agulhas Return Current ), constitute the dominant flow pattern. During the winter monsoon (November–February), however, circulation is reversed north of 30°S and winds are weakened during winter and the transitional periods between
12648-602: The monsoons. The Indian Ocean contains the largest submarine fans of the world, the Bengal Fan and Indus Fan , and the largest areas of slope terraces and rift valleys . The inflow of deep water into the Indian Ocean is 11 Sv , most of which comes from the Circumpolar Deep Water (CDW). The CDW enters the Indian Ocean through the Crozet and Madagascar basins and crosses the Southwest Indian Ridge at 30°S. In
12772-535: The most productive ecosystems of the Indian Ocean ;— coastal areas produce 20 tones of fish per square kilometre. These areas, however, are also being urbanised with populations often exceeding several thousand people per square kilometre and fishing techniques become more effective and often destructive beyond sustainable levels while the increase in sea surface temperature spreads coral bleaching. Mangroves covers 80,984 km (31,268 sq mi) in
12896-521: The need for protection from violence. The system has been described as a "massive, multinational protection racket", the Christian side of which was not ended until 1798 in the Napoleonic Wars. The Barbary corsairs were quelled as late as the 1830s, effectively ending the last vestiges of counter-crusading jihad . Piracy off the Barbary coast was often assisted by competition among European powers in
13020-571: The northern end while the Laccadive Sea separates the Maldives from the southern tip of India. The Bay of Bengal is off the east coast of India. The Gulf of Mannar and the Palk Strait separate Sri Lanka from India, while Adam's Bridge separates the two. The Andaman Sea is located between the Bay of Bengal and the Andaman Islands. In Indonesia, the so-called Indonesian Seaway is composed of
13144-545: The only way to run down raiders from the infamous corsair Moroccan port of Salé was by using a captured pirate vessel of the same type. Using oared vessels to combat pirates was common, and was even practiced by the major powers in the Caribbean. Purpose-built galleys, or hybrid sailing vessels, were built by the English in Jamaica in 1683 and by the Spanish in the late 16th century. Specially-built sailing frigates with oar-ports on
13268-680: The passes in the Alps . Moor pirates operated out of the Balearic Islands in the 10th century. From 824 to 961 Arab pirates in the Emirate of Crete raided the entire Mediterranean. In the 14th century, raids by Moor pirates forced the Venetian Duke of Crete to ask Venice to keep its fleet on constant guard. After the Slavic invasions of the former Roman province of Dalmatia in the 5th and 6th centuries,
13392-519: The place and the rapids at the Dnieper river effectively guarded the place from invasions of vengeful powers. The main target of the inhabitants of the Zaporizhian Sich who called themselves "Cossacks", were rich settlements at the Black Sea shores of Ottoman Empire and Crimean Khanate . By 1615 and 1625, Zaporozhian Cossacks had even managed to raze townships on the outskirts of Istanbul , forcing
13516-519: The region include the effects of climate change , piracy, and strategic disputes over island territories. The Indian Ocean has been known by its present name since at least 1515, when the Latin form Oceanus Orientalis Indicus ( lit. ' Indian Eastern Ocean ' ) is attested, named after India, which projects into it. It was earlier known as the Eastern Ocean , a term that was still in use during
13640-456: The region. Jang Bogo had become incensed at the treatment of his fellow countrymen, who in the unstable milieu of late Tang often fell victim to coastal pirates or inland bandits. After returning to Silla around 825, and in possession of a formidable private fleet headquartered at Cheonghae ( Wando ), Jang Bogo petitioned the Silla king Heungdeok ( r. 826–836 ) to establish a permanent maritime garrison to protect Silla merchant activities in
13764-432: The respective enemies of their faith, and both used galleys as their primary weapons. Both sides also used captured or bought galley slaves to man the oars of their ships. The Muslims relied mostly on captured Christians, the Christians used a mix of Muslim slaves, Christian convicts and a small contingency of buonavoglie , free men who out of desperation or poverty had taken to rowing. Historian Peter Earle has described
13888-417: The shipping of Christian powers, including massive slave raids at sea as well as on land. The Barbary pirates were nominally under Ottoman suzerainty , but had considerable independence to prey on the enemies of Islam. The Muslim corsairs were technically often privateers with support from legitimate, though highly belligerent, states. They considered themselves as holy Muslim warriors, or ghazis , carrying on
14012-414: The slave trade and was seeking to induce other countries to do likewise. This led to complaints from states which were still vulnerable to the corsairs that Britain's enthusiasm for ending the trade in African slaves did not extend to stopping the enslavement of Europeans and Americans by the Barbary States. In order to neutralise this objection and further the anti-slavery campaign, in 1816 Lord Exmouth
14136-415: The tradition of fighting the incursion of Western Christians that had begun with the First Crusade late in the 11th century. Coastal villages and towns of Italy, Spain and islands in the Mediterranean were frequently attacked by Muslim corsairs, and long stretches of the Italian and Spanish coasts were almost completely abandoned by their inhabitants. After 1600, the Barbary corsairs occasionally entered
14260-424: The troops of the Holy Roman Emperor Charles V with some success. Toward the end of the 9th century, Moorish pirate havens were established along the coast of southern France and northern Italy. In 846 Moor raiders sacked the extra muros Basilicas of Saint Peter and Saint Paul in Rome. In 911, the bishop of Narbonne was unable to return to France from Rome because the Moors from Fraxinet controlled all
14384-401: The two sides of the Christian-Muslim Mediterranean conflict as "mirror image[s] of maritime predation, two businesslike fleets of plunderers set against each other". This conflict of faith in the form of privateering, piracy and slave raiding generated a complex system that was upheld/financed/operated on the trade in plunder and slaves that was generated from a low-intensive conflict, as well as
14508-415: The ventilation of the Indian Ocean thermocline . That continent also drives the Indian Ocean monsoon , the strongest on Earth, which causes large-scale seasonal variations in ocean currents, including the reversal of the Somali Current and Indian Monsoon Current . Because of the Indian Ocean Walker circulation there are no continuous equatorial easterlies. Upwelling occurs near the Horn of Africa and
14632-410: The world's five oceanic divisions, covering 70,560,000 km (27,240,000 sq mi) or approximately 20% of the water area of Earth's surface . It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by the Southern Ocean , or Antarctica , depending on the definition in use. The Indian Ocean has large marginal, or regional seas, such as
14756-417: The world. Long-term ocean temperature records show a rapid, continuous warming in the Indian Ocean, at about 1.2 °C (34.2 °F) (compared to 0.7 °C (33.3 °F) for the warm pool region) during 1901–2012. Research indicates that human induced greenhouse warming , and changes in the frequency and magnitude of El Niño (or the Indian Ocean Dipole ), events are a trigger to this strong warming in
14880-404: Was also practiced by foreign seafarers on a smaller scale, including Chinese, Japanese, and European traders, renegades, and outlaws. The volume of piracy and raids were often dependent on the ebb and flow of trade and monsoons , with pirate season (known colloquially as the "Pirate Wind") starting from August to September. Slave raids were of high economic importance to the Muslim Sultanates in
15004-407: Was common. By the era of Classical Greece , piracy was looked upon as a "disgrace" to have as a profession. In the 3rd century BC, pirate attacks on Olympus in Lycia brought impoverishment. Among some of the most famous ancient pirateering peoples were the Illyrians, a people populating the western Balkan peninsula. Constantly raiding the Adriatic Sea , the Illyrians caused many conflicts with
15128-437: Was sent to secure new concessions from Tripoli , Tunis , and Algiers , including a pledge to treat Christian captives in any future conflict as prisoners of war rather than slaves and the imposition of peace between Algiers and the kingdoms of Sardinia and Sicily . On his first visit he negotiated satisfactory treaties and sailed for home. While he was negotiating, a number of Sardinian fishermen who had settled at Bona on
15252-556: Was so massive that the word for "pirate" in Malay became lanun , an exonym of the Iranun people. The economy of the Sulu sultanates was largely run by slaves and the slave trade. Male captives of the Iranun and the Banguingui were treated brutally, even fellow Muslim captives were not spared. They were usually forced to serve as galley slaves on the lanong and garay warships of their captors. Female captives, however, were usually treated better. There were no recorded accounts of rapes, though some were starved for discipline. Within
15376-404: Was traditionally of central importance to the North African economy, presented difficulties beyond those faced in ending attacks on ships of individual nations, which had left slavers able to continue their accustomed way of life by preying on less well-protected peoples. Algiers renewed its slave-raiding, though on a smaller scale. Measures to be taken against the city's government were discussed at
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