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Diego Garcia is an island of the
British Indian Ocean Territory The British Indian Ocean Territory (BIOT) is an Overseas Territory of the United Kingdom situated in the Indian Ocean, halfway between Tanzania and Indonesia. The territory comprises the seven atolls of the Chagos Archipelago with over 1,000 ...
, a
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overseas territory of the United Kingdom also claimed by Mauritius. It is a militarised atoll just south of the
equator The equator is a circle of latitude, about in circumference, that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, halfway between the North and South poles. The term can als ...
in the central Indian Ocean, and the largest of the 60 small islands of the Chagos Archipelago. Portuguese sailors under Pedro Mascarenhas were the first Europeans to discover the island, finding it uninhabited in 1512. After a 1786 British colony failed, the French began using the island as a
leper colony A leper colony, also known by many other names, is an isolated community for the quarantining and treatment of lepers, people suffering from leprosy. '' M. leprae'', the bacterium responsible for leprosy, is believed to have spread from East Af ...
and, starting in 1793, coconut cultivation by enslaved labor. It was transferred to British rule after the Napoleonic Wars. It was one of the "Dependencies" of the British Colony of Mauritius until the Chagos Islands were detached for inclusion in the newly created British Indian Ocean Territory (BIOT) in 1965. In 1966, the population of the island was 924. These people were employed as contract farm workers primarily on copra plantations owned by the Chagos-Agalega company. Although local plantation managers commonly allowed pensioners and the disabled to remain in the islands and continue to receive housing and rations in exchange for light work, children after the age of 12 were required to work. In 1964, only 3 of a population of 963 were unemployed. In April 1967, the BIOT Administration bought out Chagos-Agalega for £600,000, thus becoming the sole property owner in the BIOT. The Crown immediately leased back the properties to Chagos-Agalega but the company terminated the lease at the end of 1967. Between 1968 and 1973, the Chagossian (Îlois) inhabitants were forcibly expelled from Diego Garcia by the UK Government so that a joint US/UK military base could be established on the island. Many were deported to Mauritius and the Seychelles, following which the United States built the large Naval Support Facility Diego Garcia, which has been in continuous operation since then. In 2019, this action and continued British administration of the archipelago were deemed illegal by the International Court of Justice in The Hague, a ruling the United Nations General Assembly supported. However, the British dismissed this ruling as not legally binding. , Diego Garcia is the only inhabited island of the BIOT; the population is composed of military personnel and supporting contractors. It is one of two critical US bomber bases in the Indo-Pacific region, along with
Andersen Air Force Base Andersen Air Force Base (Andersen AFB, AAFB) is a United States Air Force base located primarily within the village of Yigo in the United States territory of Guam. The host unit at Andersen AFB is the 36th Wing (36 WG), assigned to the Pacific ...
in Guam. The atoll is located east of Tanzania's coast, south-southwest of the southern tip of India (at Kanyakumari), and west-northwest of the west coast of
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
(at Cape Range National Park, Western Australia). Diego Garcia lies at the southernmost tip of the Chagos-Laccadive Ridge, a vast underwater mountain range with peaks consisting of coral reefs, atolls, and islands comprising Lakshadweep, the Maldives, and the Chagos Archipelago. Local time is UTC+6 year-round.


History


Before European discovery

There is no tangible evidence for human contact with the BIOT prior to European arrival. According to Southern Maldivian oral tradition, traders and fishermen were occasionally lost at sea and got stranded on one of the islands of the Chagos. Eventually, they were rescued and brought back home. However, the different atolls of the Chagos have no individual names in the Maldivian oral tradition. Nothing is known of pre-European contact history of Diego Garcia. Speculations include visits during the Austronesian diaspora around AD 700, as some say the old Maldivian name for the islands originated from Malagasy. Arabs, who reached Lakshadweep and Maldives around AD 900, may have visited the Chagos.


European discovery

The uninhabited islands were discovered by the Portuguese navigator, explorer, and diplomat Pedro Mascarenhas in 1512, first named as Dom Garcia, in honour of his patron, Dom Garcia de Noronha when he was detached from the Portuguese India Armadas during his voyage of 1512–1513. Another Portuguese expedition with a Spanish explorer of Andalusian origin, Diego García de Moguer, rediscovered the island in 1544 and named it after himself. Garcia de Moguer died the same year on the return trip to Portugal in the Indian Ocean, off the South African coast. The misnomer "Diego" could have been made unwittingly by the British ever since, as they copied the Portuguese maps. It is assumed that the island was named after one of its first two discoverers—the one by the name of Garcia, the other with name Diego. Also, a cacography of the saying ''Deo Gracias'' () is eligible for the attribution of the atoll. Although the Cantino planisphere (1504) and the Ruysch map (1507) clearly delineate the Maldive Islands, giving them the same names, they do not show any islands to the south which can be identified as the Chagos archipelago. The Sebastian Cabot map (
Antwerp Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,
1544) shows a number of islands to the south which may be the Mascarene Islands. The first map which identifies and names "''Los Chagos''" (in about the right position) is that of
Pierre Desceliers Pierre Desceliers ( 1537–1553) was a French cartographer of the Renaissance and an eminent member of the Dieppe School of Cartography. He is considered the father of French hydrography. Little is known of his life. He was probably born at Arq ...
( Dieppe 1550), although Diego Garcia is not named. An island called "Don Garcia" appears on the '' Theatrum Orbis Terrarum'' of Abraham Ortelius (Antwerp 1570), together with "Dos Compagnos", slightly to the north. It may be the case that "Don Garcia" was named after Garcia de Noronha, although no evidence exists to support this. The island is also labelled "Don Garcia" on Mercator's '' Nova et Aucta Orbis Terrae Descriptio ad Usum Navigatium Emendate'' (Duisburg 1569). However, on the ''Vera Totius Expeditionis Nauticae Description'' of Jodocus Hondius (London 1589), "Don Garcia" mysteriously changes its name to "I. de Dio Gratia", while the "I. de Chagues" appears close by. The first map to delineate the island under its present name, Diego Garcia, is the ''World Map'' of Edward Wright (London 1599), possibly as a result of misreading Dio (or simply "D.") as Diego, and Gratia as Garcia. The ''Nova Totius Terrarum Orbis Geographica'' of
Hendrik Hondius II Henricus Hondius II (1597 – 16 August 1651) was a Dutch engraver, cartographer, and publisher. Life He was born in Amsterdam, the son of the famous cartographer Jodocus Hondius who had started a map-making business in the city. Henricus ...
(Antwerp 1630) repeats Wright's use of the name, which is then proliferated on all subsequent Dutch maps of the period, and to the present day.


Settlement of the island

Diego Garcia and the rest of the Chagos islands were uninhabited until the late 18th century. In 1778, the French Governor of Mauritius granted Monsieur Dupuit de la Faye the island of Diego Garcia, and evidence exists of temporary French visits to collect coconuts and fish. Edis (2004), p. 29. Several Frenchmen living in "a dozen huts" abandoned Diego Garcia when the British East India Company attempted to establish a settlement there in April 1786. The supplies of the 275 settlers were overwhelmed by 250 survivors of the wreck of the British East Indian Ship ''Atlas'' in May, and the colony failed in October. Edis (2004), p. 32. Following the departure of the British, the French colony of Mauritius began marooning lepers on the island, and in 1793, the French established a
coconut The coconut tree (''Cocos nucifera'') is a member of the palm tree family ( Arecaceae) and the only living species of the genus ''Cocos''. The term "coconut" (or the archaic "cocoanut") can refer to the whole coconut palm, the seed, or the ...
plantation using slave labour, which exported, too, cordage made from coir (coconut fibre), and
sea cucumber Sea cucumbers are echinoderms from the class Holothuroidea (). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide. The number of holothuria ...
s as a far-eastern delicacy. Diego Garcia became a colony of the UK after the Napoleonic Wars as part of the Treaty of Paris (1814), and from 1814 to 1965 it was administered from Mauritius; the main plantations were at East Point, the main settlement, Minni Minni, north of East Point, and Pointe Marianne, on the western rim, all on the lagoon side of the atoll. The workers lived at each and at villages scattered around the atoll. From 1881 until 1888, the atoll hosted two coaling stations for steamships crossing the Indian Ocean.D. R. Stoddart (1971): "Settlement and development of Diego Garcia". In: Stoddart & Taylor (1971), pp. 209–218. In 1882, the French-financed, Mauritian-based Société Huilière de Diego et de Peros (the "Oilmaking Company of Diego and Peros"), consolidated all the plantations in the Chagos under its control.


20th century

In 1914, the island was visited by the German light cruiser halfway through its commerce-raiding cruise during the early months of World War I. In 1942, the British opened RAF Station Diego Garcia and established an advanced flying boat unit at the East Point Plantation, staffed and equipped by No. 205 and No. 240 Squadrons, then stationed on Ceylon. Both Catalina and
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aircraft were flown during the course of World War II in search of Japanese and German submarines and surface raiders. At Cannon Point, two 6-inch naval guns were installed by a
Royal Marines The Corps of Royal Marines (RM), also known as the Royal Marines Commandos, are the UK's special operations capable commando force, amphibious light infantry and also one of the five fighting arms of the Royal Navy. The Corps of Royal Marine ...
detachment. In February 1942, the mission was to protect the small Royal Navy base and Royal Air Force station located on the island from Japanese attack. Operation of the guns was later taken over by Mauritian and Indian Coastal Artillery troops. Following the conclusion of hostilities, the station was closed on 30 April 1946. In 1962, the Chagos Agalega Company of the British colony of Seychelles purchased the Société Huilière de Diego et Peros and moved company headquarters to Seychelles. Edis (2004), p. 82. In the early 1960s, the UK was withdrawing its military presence from the Indian Ocean, not including the airfield at RAF Gan to the north of Diego Garcia in the Maldives (which remained open until 1976), and agreed to permit the United States to establish a naval communication station on one of its island territories there. The United States requested an unpopulated island belonging to the UK to avoid political difficulties with newly independent countries, and ultimately the UK and United States agreed that Diego Garcia was a suitable location. Sand (2009), p. 3.


Purchase by the United Kingdom

To accomplish the UK–US mutual defence strategy, in November 1965, the UK purchased the Chagos Archipelago, which includes Diego Garcia, from the then self-governing colony of Mauritius for £3 million to create the
British Indian Ocean Territory The British Indian Ocean Territory (BIOT) is an Overseas Territory of the United Kingdom situated in the Indian Ocean, halfway between Tanzania and Indonesia. The territory comprises the seven atolls of the Chagos Archipelago with over 1,000 ...
(BIOT), with the intent of ultimately closing the plantations to provide the uninhabited British territory from which the United States would conduct its military activities in the region. In April 1966, the British government bought the entire assets of the Chagos Agalega Company in the BIOT for £600,000 and administered them as a government enterprise and immediately leased the plantations back to Chagos Agalega while awaiting United States funding of the proposed facilities, with an interim objective of paying for the administrative expenses of the new territory. However, the plantations, both under their previous private ownership and under government administration, proved consistently unprofitable due to the introduction of new oils and lubricants in the international marketplace, and the establishment of vast coconut plantations in the East Indies and the Philippines and the company terminated the lease at the end of 1967. On 30 December 1966, the United States and the UK executed an agreement through an Exchange of Notes which permitted the United States to use the BIOT for defence purposes for 50 years until December 2016, followed by a 20-year extension (to 2036) as long as neither party gave notice of termination in a two-year window (December 2014 – December 2016) and the UK may decide on what additional terms to extend the agreement. No monetary payment was made from the United States to the UK as part of this agreement or any subsequent amendment. Rather, the United Kingdom received a US$14-million discount from the United States on the acquisition of submarine-launched
Polaris missiles The UGM-27 Polaris missile was a two-stage solid-fueled nuclear-armed submarine-launched ballistic missile (SLBM). As the United States Navy's first SLBM, it served from 1961 to 1980. In the mid-1950s the Navy was involved in the Jupiter missile ...
per a now-declassified addendum to the 1966 agreement.


Arrival of the U.S. Navy

To the United States, Diego Garcia was a prime territory for setting up a foreign military base. According to Stuart Barber—a civilian working for the US Navy at the Pentagon—Diego Garcia was located far away from any potential threats, it was low in a native population and it was an island that was not sought after by other countries as it lacked economic interest. To Barber, Diego Garcia and other acquired islands would play a key role in maintaining US dominance. Here Barber designed the strategic island concept, where the US would obtain as many less populated islands as possible for military purposes. According to Barber, this was the only way to ensure security for a foreign base. Diego Garcia is often referred to as "Fantasy Island" for its seclusion. The key component in obtaining Diego Garcia was the perceived lack of a native population on the island. Uninhabited until the late 18th century, Diego Garcia had no indigenous population. Its only inhabitants were European overseers who managed the coconut plantations for their absentee landowners and contract workers mostly of African, Indian, and Malay ancestry, known as Chagossians, who had lived and worked on the plantations for several generations. Prior to setting up a military base, the United States government was informed by the British government—which owned the island—that Diego Garcia had a population of hundreds. The eventual number of Chagossians numbered around 1,000. Regardless of the size of the population, the Chagossians had to be removed from the island before the base could be constructed. In 1968, the first tactics were implemented to decrease the population of Diego Garcia. Those who left the island—either for vacation or medical purposes—were not allowed to return, and those who stayed could obtain only restricted food and medical supplies. This tactic was in hope that those that stayed would leave "willingly". One of the tactics used was that of killing Chagossian pets. In March 1971, United States Naval construction battalions arrived on Diego Garcia to begin the construction of the communications station and an airfield. To satisfy the terms of an agreement between the UK and the United States for an uninhabited island, the plantation on Diego Garcia was closed in October of that year. Sand (2009), p. 24. The plantation workers and their families were relocated to the plantations on Peros Bahnos and Salomon atolls to the northwest. The by-then-independent Mauritian government refused to accept the islanders without payment, and in 1974, the UK gave the Mauritian government an additional £650,000 to resettle the islanders. Sand (2009), p. 25. Those who still remained on the island of Diego Garcia between 1971 and 1973 were forced onto cargo ships that were heading to Mauritius and the Seychelles. By 1973, construction of the Naval Communications Station was completed. In the early 1970s, setbacks to United States military capabilities in the region including the fall of Saigon, victory of the
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in Cambodia, the closure of the Peshawar Air Station listening post in Pakistan and Kagnew Station in
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, the ''Mayaguez'' incident, and the build-up of Soviet naval presence in
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and a Soviet airbase at Berbera, Somalia, caused the United States to request, and the UK to approve, permission to build a fleet anchorage and enlarged airfield on Diego Garcia, Edis (2004), p. 90. and the Seabees doubled the number of workers constructing these facilities. Following the fall of the Shah of Iran and the Iran Hostage Crisis in 1979–1980, the West became concerned with ensuring the flow of oil from the Persian Gulf through the
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, and the United States received permission for a $400-million expansion of the military facilities on Diego Garcia consisting of two parallel runways, expansive parking aprons for heavy bombers, 20 new anchorages in the lagoon, a deep-water pier, port facilities for the largest naval vessels in the U.S. and British fleets, aircraft hangars, maintenance buildings and an air terminal, a fuel storage area, and billeting and messing facilities for thousands of sailors and support personnel. The closure of the U.S. bases in the Philippines in the early 1990s brought many workers from Subic Bay and
Clark Air Base Clark Air Base is a Philippine Air Force base on Luzon Island in the Philippines, located west of Angeles City, about northwest of Metro Manila. Clark Air Base was previously a United States military facility, operated by the U.S. Air Forc ...
to Diego Garcia.


21st century

On 23 June 2017, the United Nations General Assembly (UNGA) voted in favour of referring the territorial dispute between Mauritius and the UK to the International Court of Justice (ICJ) in order to clarify the legal status of the Chagos Islands archipelago in the Indian Ocean. The motion was approved by a majority vote with 94 voting for and 15 against. In February 2019, the ICJ in The Hague ruled that the United Kingdom must transfer the islands to Mauritius as they were not legally separated from the latter in 1965. The UK Foreign Office said the ruling is not legally binding. In May 2019, the United Nations General Assembly affirmed the decision of the International Court of Justice and demanded that the United Kingdom withdraw its colonial administration from the Islands and cooperate with Mauritius to facilitate the resettlement of Mauritian nationals in the archipelago. In a written statement, the U.S. government said that neither the Americans nor the British have any plans to discontinue use of the military base on Diego Garcia. The statement said in a footnote: "In 2016, there were discussions between the United Kingdom and the United States concerning the continuing importance of the joint base. Neither party gave notice to terminate and the agreement remains in force until 2036". In June 2020, a Mauritian official offered to allow the United States to retain its military base on the island if Mauritius succeeded in regaining sovereignty over the Chagos archipelago.


Chagos Marine Protected Area

On 1 April 2010, the Chagos Marine Protected Area (MPA) was declared to cover the waters around the Chagos Archipelago. However, Mauritius objected, stating this was contrary to its legal rights, and on 18 March 2015, in light of the '' Mauritius v. United Kingdom'' case, the Permanent Court of Arbitration ruled that the Chagos Marine Protected Area was illegal under the United Nations Convention on the Law of the Sea as Mauritius had legally binding rights to fish in the waters surrounding the Chagos Archipelago, to an eventual return of the Chagos Archipelago, and to the preservation of any minerals or oil discovered in or near the Chagos Archipelago prior to its return.


Inhabitants

Diego Garcia had no permanent inhabitants when discovered by the Spanish explorer Diego García de Moguer in the 16th century, then in the service of Portugal, and this remained the case until it was settled as a French colony in 1793.


French settlement

Most inhabitants of Diego Garcia through the period 1793–1971 were plantation workers, but also included Franco-Mauritian managers, Indo-Mauritian administrators, Mauritian and Seychellois contract employees, and in the late 19th century, Chinese and Somali employees. A distinct Creole culture called the Îlois, which means "islanders" in French Creole, evolved from these workers. The Îlois, now called Chagos Islanders or Chagossians since the late-1990s, were descended primarily from
slaves Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...
brought to the island from Madagascar by the French between 1793 and 1810, and Malay slaves from the slave market on Pulo Nyas, an island off the northwest coast of
Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...
, from around 1820 until the slave trade ended following the Slavery Abolition Act of 1833. The Îlois also evolved a French-based Creole dialect now called Chagossian Creole. Throughout their recorded history, the plantations of the Chagos Archipelago had a population of approximately 1,000 individuals, about two-thirds of whom lived on Diego Garcia. A peak population of 1,142 on all islands was recorded in 1953. The primary industry throughout the island's colonial period consisted of coconut plantations producing copra and/or
coconut oil frameless , right , alt = A cracked coconut and a bottle of coconut oil Coconut oil (or coconut butter) is an edible oil derived from the wick, meat, and milk of the coconut palm fruit. Coconut oil is a white solid fat; in warmer climates duri ...
, until closure of the plantations and forced relocation of the inhabitants in October 1971. For a brief period in the 1880s, it served as a coaling station for steamships transiting the Indian Ocean from the
Suez Canal The Suez Canal ( arz, قَنَاةُ ٱلسُّوَيْسِ, ') is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia. The long canal is a popular ...
to
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
.


Expulsion of 1971

All the inhabitants of Diego Garcia were forcibly resettled to other islands in the Chagos Archipelago, Mauritius or Seychelles by 1971 to satisfy the requirements of a UK/United States Exchange of Notes signed in 1966 to depopulate the island when the United States constructed a base upon it. No current agreement exists on how many of the evacuees met the criteria to be an Îlois, and thus be an indigenous person at the time of their removal, but the UK and Mauritian governments agreed in 1972 that 426 families, numbering 1,151 individuals, were due compensation payments as exiled Îlois. The total number of people certified as Îlois by the Mauritian Government's Îlois Trust Fund Board in 1982 was 1,579. Fifteen years after the last expulsion, the Chagossians received compensation from the British, totalling $6,000 per person; some Chagossians received nothing. The British expulsion action remains in litigation . Today, Chagossians remain highly impoverished and are living as "marginalised" outsiders on the island of Mauritius and the Seychelles.


After 1971

Between 1971 and 2001, the only residents on Diego Garcia were UK and US military personnel and civilian employees of those countries. These included contract employees from the Philippines and Mauritius, including some Îlois. During combat operations from the atoll against Afghanistan (2001–2006) and Iraq (2003–2006), a number of allied militaries were based on the island including Australian, Japanese, and the Republic of Korea. According to David Vine, "Today, at any given time, 3,000 to 5,000 US troops and civilian support staff live on the island." The inhabitants today do not rely on the island and the surrounding waters for sustenance. Although some recreational fishing for consumption is permitted, all other food is shipped in by sea or air. In 2004, US Navy recruitment literature described Diego Garcia as being one of the world's best-kept secrets, boasting great recreational facilities, exquisite natural beauty, and outstanding living conditions. Since October 2021 there have been asylum seekers on Diego Garcia.


Politics

Diego Garcia is the only inhabited island in the British Indian Ocean Territory, an
overseas territory of the United Kingdom The British Overseas Territories (BOTs), also known as the United Kingdom Overseas Territories (UKOTs), are fourteen territories with a constitutional and historical link with the United Kingdom. They are the last remnants of the former Bri ...
, usually abbreviated as "BIOT". The Government of the BIOT consists of a
commissioner A commissioner (commonly abbreviated as Comm'r) is, in principle, a member of a commission or an individual who has been given a commission (official charge or authority to do something). In practice, the title of commissioner has evolved to in ...
appointed by King Charles III. The commissioner is based in London, resident in the Foreign, Commonwealth and Development Office (FCDO), and is assisted by an administrator and small staff. Originally colonised by the French, Diego Garcia was ceded, along with the rest of the Chagos Archipelago, to the United Kingdom in the Treaty of Paris (1814) at the conclusion of a portion of the Napoleonic Wars. Diego Garcia and the Chagos Archipelago were administered by the colonial government on the island of Mauritius until 1965, when the UK purchased them from the self-governing colony of Mauritius for £3 million, and declared them to be a separate
British Overseas Territory The British Overseas Territories (BOTs), also known as the United Kingdom Overseas Territories (UKOTs), are fourteen dependent territory, territories with a constitutional and historical link with the United Kingdom. They are the last remna ...
. Edis (2004), p. 84. The BIOT administration was moved to Seychelles following the independence of Mauritius in 1968 until the independence of Seychelles in 1976, Edis (2004), p. 80. and to a desk in the Foreign and Commonwealth Office in London since.


Military administration

The UK represents the territory internationally. A local government as normally envisioned does not exist. Rather, the administration is represented in the territory by the officer commanding British Forces on Diego Garcia, the "Brit rep". Laws and regulations are promulgated by the commissioner and enforced in the BIOT by Brit rep. Of major concern to the BIOT administration is the relationship with the United States military forces resident on Diego Garcia. An annual meeting called "The Pol-Mil Talks" (for "political-military") of all concerned is held at the Foreign and Commonwealth Office in London to resolve pertinent issues. These resolutions are formalised by an "Exchange of Letters". Neither the US nor the UK recognises Diego Garcia as being subject to the
African Nuclear Weapons Free Zone Treaty The African Nuclear-Weapon-Free Zone Treaty, also known as the Treaty of Pelindaba (named after South Africa's main Nuclear Research Centre, run by The South African Nuclear Energy Corporation and was the location where South Africa's atomic bombs ...
, which lists BIOT as covered by the treaty. It is not publicly known whether nuclear weapons have ever been stored on the island. Noam Chomsky and Peter Sand have observed and emphasised that the US and UK stance is blocking the implementation of the treaty.


Transnational political issues

There are two transnational political issues which affect Diego Garcia and the BIOT, through the British government. *The island state of Mauritius claims the Chagos Archipelago (which is conterminous with the BIOT), including Diego Garcia. A subsidiary issue is the Mauritian opposition to the UK Government's declaration of 1 April 2010 that the BIOT is a marine protected area with fishing and
extractive industry Extractivism is the process of extracting natural resources from the Earth to sell on the world market. It exists in an economy that depends primarily on the extraction or removal of natural resources that are considered valuable for exportation w ...
(including oil and gas exploration) prohibited. *The issue of compensation and repatriation of the former inhabitants, exiled since 1973, continues in litigation and as of August 2010 had been submitted to the European Court of Human Rights by a group of former residents. Some groups allege that Diego Garcia and its territorial waters out to have been restricted from public access without permission of the BIOT Government since 1971. On 3 November 2022, the British Foreign Secretary James Cleverly announced that the UK and Mauritius had decided to begin negotiations on sovereignty over the British Indian Ocean Territory, taking into account international legal proceedings. Both states had agreed to ensure the continued operation of the joint UK/US military base on Diego Garcia.


Prison site allegations

In 2015, U.S. Secretary of State
Colin Powell Colin Luther Powell ( ; April 5, 1937 – October 18, 2021) was an American politician, statesman, diplomat, and United States Army officer who served as the 65th United States Secretary of State from 2001 to 2005. He was the first African ...
's former chief of staff, Lawrence Wilkerson, said Diego Garcia was used by the CIA for "nefarious activities". He said that he had heard from three US intelligence sources that Diego Garcia was used as "a transit site where people were temporarily housed, let us say, and interrogated from time to time" and, "What I heard was more along the lines of using it as a transit location when perhaps other places were full or other places were deemed too dangerous or insecure, or unavailable at the moment". In June 2004, the British
Foreign Secretary The secretary of state for foreign, Commonwealth and development affairs, known as the foreign secretary, is a minister of the Crown of the Government of the United Kingdom and head of the Foreign, Commonwealth and Development Office. Seen as ...
Jack Straw stated that United States authorities had repeatedly assured him that no detainees had passed in transit through Diego Garcia or were disembarked there. Diego Garcia was rumoured to have been one of the locations of the CIA's black sites in 2005. Khalid Sheikh Mohammed is one of the " high-value detainees" suspected to have been held in Diego Garcia. In October 2007, the Foreign Affairs Select Committee of the British Parliament announced that it would launch an investigation of continued allegations of a prison camp on Diego Garcia, which it claimed were twice confirmed by comments made by retired U.S. Army general
Barry McCaffrey Barry Richard McCaffrey (born November 17, 1942) is a retired United States Army general and current news commentator, professor and business consultant who served in President Bill Clinton's Cabinet as the Director of the Office of National D ...
. On 31 July 2008, an unnamed former White House official alleged that the United States had imprisoned and interrogated at least one suspect on Diego Garcia during 2002 and possibly 2003. Manfred Nowak, one of five United Nations special rapporteurs on torture, said that credible evidence exists supporting allegations that ships serving as black sites have used Diego Garcia as a base. The human rights group Reprieve alleged that United States-operated ships moored outside the territorial waters of Diego Garcia were used to incarcerate and torture detainees.


Rendition flight refuelling admission

Several groups claim that the military base on Diego Garcia has been used by the United States government for transport of prisoners involved in the controversial extraordinary rendition program, an allegation formally reported to the
Council of Europe The Council of Europe (CoE; french: Conseil de l'Europe, ) is an international organisation founded in the wake of World War II to uphold European Convention on Human Rights, human rights, democracy and the Law in Europe, rule of law in Europe. ...
in June 2007. On 21 February 2008, British Foreign Secretary
David Miliband David Wright Miliband (born 15 July 1965) is the president and chief executive officer (CEO) of the International Rescue Committee and a former British Labour Party politician. He was the Foreign Secretary from 2007 to 2010 and the Member of P ...
admitted that two United States extraordinary rendition flights refuelled on Diego Garcia in 2002, and was "very sorry" that earlier denials were having to be corrected.


Leaked diplomatic cables

According to leaked diplomatic cables, in a calculated move planned in 2009, the UK proposed that the BIOT become a "marine reserve" with the aim of preventing the former inhabitants from returning to the islands. A summary of the diplomatic cable is as follows:
HMG would like to establish a "marine park" or "reserve" providing comprehensive environmental protection to the reefs and waters of the British Indian Ocean Territory (BIOT), a senior Foreign and Commonwealth Office (FCO) official informed Polcouns on 12 May. The official insisted that the establishment of a marine park—the world's largest—would in no way impinge on USG use of the BIOT, including Diego Garcia, for military purposes. He agreed that the UK and United States should carefully negotiate the details of the marine reserve to assure that United States interests were safeguarded and the strategic value of BIOT was upheld. He said that the BIOT's former inhabitants would find it difficult, if not impossible, to pursue their claim for resettlement on the islands if the entire Chagos Archipelago were a marine reserve.


Natural history

No species of plants, birds, amphibians, reptiles, molluscs, crustaceans, or mammals is endemic on Diego Garcia or in the surrounding waters. Several endemic fish and aquatic invertebrates are present, though. All plants, wildlife, and aquatic species are protected to one degree or another. In addition, much of the lagoon waters are protected wetlands as a designated
Ramsar site A Ramsar site is a wetland site designated to be of international importance under the Ramsar Convention,8 ha (O) *** Permanent 8 ha (P) *** Seasonal Intermittent < 8 ha(Ts) **
Diego Garcia is the largest land mass in the Chagos Archipelago (which includes Peros Banhos, the Salomon Islands, the Three Brothers, the Egmont Islands, and the Great Chagos Bank), being an atoll occupying approximately , of which is dry land. The continuous portion of the atoll rim stretches from one end to the other, enclosing a lagoon long and up to wide, with a pass opening at the north. Three small islands are located in the pass. The island consists of the largest continuous dryland rim of all atolls in the world. The dryland rim varies in width from a few hundred metres to 2.4 km. Typical of coral atolls, it has a maximum elevation on some dunes on the ocean side of the rim of 9 m (30 ft) above mean low water. The rim nearly encloses a lagoon about long and up to wide. The atoll forms a nearly complete rim of land around a lagoon, enclosing 90% of its perimeter, with an opening only in the north. The main island is the largest of about 60 islands which form the Chagos Archipelago. Besides the main island, three small islets are at the mouth of the lagoon: West Island (), Middle Island () and East Island (). A fourth, Anniversary Island, 1 km (1,100 yards) southwest of Middle Island, appears as just a sand bar on satellite images. Both Middle Island and Anniversary Island are part of the Spur Reef complex. Natural Resources Management Plan (2005), paragraph 2.5.1. The total area of the atoll is about . The lagoon area is roughly with depths ranging down to about . The total land area (excluding peripheral reefs) is around . The coral reef surrounding the seaward side of the atoll is generally broad, flat, and shallow around below mean sea level in most locations and varying from in width. This fringing seaward reef shelf comprises an area around . At the outer edge of the reef shelf, the bottom slopes very steeply into deep water, at some locations dropping to more than within of the shore. In the lagoon, numerous coral heads present hazards to navigation. The shallow reef shelf surrounding the island on the ocean side offers no ocean-side anchorage. The channel and anchorage areas in the northern half of the lagoon are dredged, along with the pre-1971 ship turning basin. Significant saltwater wetlands called barachois exist in the southern half of the lagoon. These small lagoons off of the main lagoon are filled with seawater at high tide and dry at low tide. Scientific expeditions in 1996 and 2006 described the lagoon and surrounding waters of Diego Garcia, along with the rest of the Chagos Archipelago, as "exceptionally unpolluted" and "pristine". Diego Garcia is frequently subject to earthquakes caused by tectonic plate movement along the
Carlsberg Ridge The Carlsberg Ridge is the northern section of the Central Indian Ridge, a divergent tectonic plate boundary between the African Plate and the Indo-Australian Plate, traversing the western regions of the Indian Ocean. The ridge of which the Carls ...
located just to the west of the island. One was recorded in 1812; one measuring 7.6 on the Richter Scale hit on 30 November 1983, at 23:46 local time and lasted 72 seconds, resulting in minor damage including wave damage to a 50-m stretch of the southern end of the island, and another on 2 December 2002, an earthquake measuring 4.6 on the Richter scale struck the island at 12:21 am. In December 2004, a tsunami generated near Indonesia caused minor shoreline erosion on Barton Point (the northeast point of the atoll of Diego Garcia).


Oceanography

Diego Garcia lies within the influence of the South Equatorial Current year-round. The surface currents of the Indian Ocean also have a monsoonal regimen associated with the Asian Monsoonal wind regimen. Sea surface temperatures are in the range of year-round. Local Area Forecaster's Handbook (2002), p. 13.


Fresh water supply

Diego Garcia is the above-water rim of a coral atoll composed of Holocene coral rubble and sand to the depth of about , overlaying Pleistocene limestone deposited at the then-sea level on top of a
seamount A seamount is a large geologic landform that rises from the ocean floor that does not reach to the water's surface (sea level), and thus is not an island, islet or cliff-rock. Seamounts are typically formed from extinct volcanoes that rise abru ...
rising about from the floor of the Indian Ocean. The Holocene sediments are porous and completely saturated with sea water. Any rain falling on the above-water rim quickly percolates through the surface sand and encounters the salt water underneath. Diego Garcia is of sufficient width to minimise tidal fluctuations in the aquifer, and the rainfall (in excess of 102.5 inches/260 cm per year on average) is sufficient in amount and periodicity for the fresh water to form a series of convex, freshwater, Ghyben-Herzberg lenses floating on the heavier salt water in the saturated sediments. Urish (1974), p. 27. The horizontal structure of each lens is influenced by variations in the type and porosity of the subsurface deposits, which on Diego Garcia are minor. At depth, the lens is globular; near the surface, it generally conforms to the shape of the island. When a Ghyben-Herzberg lens is fully formed, its floating nature will push a freshwater head above mean sea level, and if the island is wide enough, the depth of the lens below mean sea level will be 40 times the height of the water table above sea level. On Diego Garcia, this equates to a maximum depth of 20 m. However, the actual size and depth of each lens is dependent on the width and shape of the island at that point, the permeability of the aquifer, and the equilibrium between recharging rainfall and losses to evaporation to the atmosphere, transpiration by plants, tidal advection, and human use. In the plantation period, shallow wells, supplemented by rainwater collected in cisterns, provided sufficient water for the pastoral lifestyle of the small population. On Diego Garcia today, the military base uses over 100 shallow "horizontal" wells to produce over 560,000 L per day from the "Cantonment" lens on the northwest arm of the island—sufficient water for western-style usage for a population of 3,500. This 3.7 km2 lens holds an estimated 19 million m3 of fresh water and has an average daily recharge from rainfall over 10,000 m3, of which 40% remains in the lens and 60% is lost through evapotranspiration. Extracting fresh water from a lens for human consumption requires careful calculation of the sustainable yield of the lens by season because each lens is susceptible to corruption by saltwater intrusion caused by overuse or drought. In addition, overwash by tsunamis and tropical storms has corrupted lenses in the Maldives and several Pacific islands. Vertical wells can cause salt upcoming into the lens, and overextraction will reduce freshwater pressure resulting in lateral intrusion by seawater. Because the porosity of the surface soil results in virtually zero runoff, lenses are easily polluted by fecal waste, burials, and chemical spills. Corruption of a lens can take years to "flush out" and reform, depending on the ratio of recharge to losses. A few natural depressions on the atoll rim capture the abundant rainfall to form areas of freshwater wetlands.D. R. Stoddart (1971): "Land vegetation of Diego Garcia". In: Stoddart & Taylor (1971), pp. 127–142. Two are of significance to island wildlife and to recharge their respective freshwater lenses. One of these is centred on the northwest point of the atoll; another is found near the Point Marianne Cemetery on the southeast end of the airfield. Other, smaller freshwater wetlands are found along the east side of the runway, and in the vicinity of the receiver antenna field on the northwest arm of the atoll. Also, several man-made freshwater ponds resulted from excavations made during construction of the airfield and road on the western half of the atoll rim. These fill from rainfall and from extending into the Ghyben-Herzberg lenses found on this island.


Climate

Diego Garcia has an equatorial tropical rainforest climate ( Köppen ''Af''). The surrounding sea surface temperature is the primary climatic control, and temperatures are generally uniform throughout the year, with an average maximum of by day during March and April, and from July to September. Diurnal variation is roughly , falling to the low by night. Humidity is high throughout the year. The almost constant breeze keeps conditions reasonably comfortable. From December through March, winds are generally westerly around . During April and May, winds are light and variable, ultimately backing to an east-southeasterly direction. From June through September, the influence of the Southeast trades is felt, with speeds of 10–15 knots. During October and November, winds again go through a period of light and variable conditions veering to a westerly direction with the onset of summer in the Southern Hemisphere. All precipitation falls as rain, characterised by air mass-type showers. Annual rainfall averages , with the heaviest precipitation from September to April. January is the wettest month with of mean monthly precipitation, and August the driest month, averaging of mean monthly precipitation. Thunderstorm activity is generally noticed during the afternoon and evenings during the summer months (December through March), when the
Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ ), known by sailors as the doldrums or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal e ...
is in the vicinity of the island. Local Area Forecaster's Handbook (2002), p. 14. Diego Garcia is at minimum risk from tropical cyclones due to its proximity to the
equator The equator is a circle of latitude, about in circumference, that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, halfway between the North and South poles. The term can als ...
where the coriolis parameter required to organise circulation of the upper atmosphere is minimal. Low-intensity storms have hit the island, including one in 1901, which blew over 1,500 coconut trees; one on 16 September 1944, which caused the wreck of a Royal Air Force PBY Catalina; one in September 1990 which demolished the tent city then being constructed for United States Air Force bomber crews during Operation Desert Storm; and one on 22 July 2007, when winds exceeded and over of rain fell in 24 hours. The island was somewhat affected by the tsunami caused by the
2004 Indian Ocean earthquake An earthquake and a tsunami, known as the Boxing Day Tsunami and, by the scientific community, the Sumatra–Andaman earthquake, occurred at 07:58:53 local time (UTC+7) on 26 December 2004, with an epicentre off the west coast of northern Suma ...
. Service personnel on the western arm of the island reported only a minor increase in wave activity. The island was protected to a large degree by its favourable ocean topography. About east of the atoll lies the 650-km-long (400-mile) Chagos Trench, an underwater canyon plunging more than . The depth of the trench and its grade to the atoll's slope and shelf shore makes it more difficult for substantial tsunami waves to build before passing the atoll from the east. In addition, near-shore coral reefs and an algal platform may have dissipated much of the waves' impact. A biological survey conducted in early 2005 indicated erosional effects of the tsunami wave on Diego Garcia and other islands of the Chagos Archipelago. One stretch of shoreline was found to have been breached by the tsunami wave, representing about 10% of the eastern arm. A biological survey by the Chagos Conservation Trust reported that the resulting inundation additionally washed away shoreline shrubs and small to medium-sized coconut palms.


Vegetation

The first botanical observations of the island were made by Hume in 1883, when the coconut plantations had been in operation for a full century. Subsequent studies and collections during the plantation era were made in 1885, 1905, 1939, and 1967. Thus, very little of the nature of the precontact vegetation is known. The 1967 survey, published by the Smithsonian is used as the most authoritative baseline for more recent research. These studies indicate the vegetation of the island may be changing rapidly. For example, J. M. W. Topp collected data annually between 1993 and 2003 and found that on the average three new plant species arrived each year, mainly on Diego Garcia. His research added fully a third more species to Stoddart. Topp and Martin Hamilton of Kew Gardens compiled the most recent checklist of vegetation in 2009. In 1967, Stoddart described the land area of Diego Garcia as having a littoral hedge of '' Scaevola taccada'', while inland, '' Cocos nucifera'' (coconut) was the most dominant tree, covering most of the island. The substory was either managed and park-like, with understory less than 0.5 m in height, or consisted of what he called "Cocos Bon-Dieu" – an intermediate story of juvenile trees and a luxuriant ground layer of self-sown seedlings – causing those areas to be relatively impenetrable.F. R. Fosberg & A. A. Bullock (1971): "List of Diego Garcia vascular plants". In: Stoddart & Taylor (1971), pp. 143–160. Also, areas of remnant tropical hardwood forest are at the sites of the plantation-era villages, as well as ''
Casuarina equisetifolia ''Casuarina equisetifolia'', common names ''Coastal She-oak'' or ''Horsetail She-oak'' (sometimes referred to as the Australian pine tree or whistling pine tree outside Australia), is a she-oak species of the genus ''Casuarina''. The native ...
'' (iron wood pines) woodlands. In 1997, the United States Navy contracted a vegetation survey that identified about 280 species of terrestrial vascular plants on Diego Garcia. None of these was endemic, and another survey in 2005 identified just 36 species as "native", meaning arriving without the assistance of humans, and found elsewhere in the world. No terrestrial plant species are of any conservation-related concern at present. Of the 36 native vascular plants on Diego Garcia, 12 are trees, five are
shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...
s, seven are
dicotyledon The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, t ...
herbs, three are grasses, four are vines, and five are ferns. The 12 tree species are: '' Barringtonia asiatica'' (fish-poison tree), '' Calophyllum inophyllum'' (Alexandrian laurel), '' Cocos nucifera'', '' Cordia subcordata'', '' Guettarda speciosa'', '' Intsia bijuga'', ''
Hernandia sonora ''Hernandia'' is a genus of flowering plants in the family Hernandiaceae. It was named after the Spanish botanist Francisco Hernández de Toledo. Species , ''Plants of the World Online'' accepted the following species: * ''Hernandia albiflora'' ...
'', '' Morinda citrifolia'', ''
Neisosperma oppositifolium ''Ochrosia oppositifolia'' grows as a small to medium-sized tree up to tall, with a trunk diameter of up to . Its flowers feature a creamy to white corolla. Its habitat is coastal forest, bush or open areas to altitude, rarely inland. Local me ...
'', '' Pisonia grandis'', '' Terminalia catappa'', and '' Heliotropium foertherianum''. Another three tree species are common, and may be native, but they may also have been introduced by humans: ''Casuarina equisetifolia'', '' Hibiscus tiliaceus'', and '' Pipturus argenteus''. The five native shrubs are: '' Caesalpinia bonduc'', '' Pemphis acidula'', '' Premna serratifolia'', ''Scaevola taccada'' (often mispronounced "Scaveola"), and ''
Suriana maritima ''Suriana'' is a monotypic genus of flowering plants containing only ''Suriana maritima'', which is commonly known as bay cedar. Distribution It has a pantropical distribution and can be found on coasts in the New and Old World tropics. Descri ...
''. Also, 134 species of plants are classified as "weedy" or "naturalised alien species", being those unintentionally introduced by man, or intentionally introduced as ornamentals or crop plants which have now "gone native", including 32 new species recorded since 1995, indicating a very rapid rate of introduction. The remainder of the species list consists of cultivated food or ornamental species, grown in restricted environments such as a planter's pot. In 2004, 10 plant communities were recognised on the atoll rim: * ''Calophyllum'' forest, dominated by ''Calophyllum inophyllum'', with trunks that can grow in excess of 2 m in diameter: This forest often contains other species such as ''Hernandia sonora'', ''Cocos nucifera'', and ''Guettarda speciosa'' with a ''Premna obtusifolia'' edge. When found on the beaches, ''Calophyllum'' often extends over the lagoon water and supports nesting red-footed boobies, as does ''Barringtonia asiatica'' found mostly on the eastern arm of the atoll. * ''Cocos'' forest, essentially monotypic (''Cocos bon Dieu''), with the understory consisting of coconut seedlings * ''Cocos-Hernandia'' forest, dominated by two canopy species—''C. nucifera'' and ''H. sonora'' * ''Cocos-Guettarda'' forest, dominated by the canopy species ''C. nucifera'' and ''G. speciosa'': The understory consists of a mix of ''Neisosperma oppositifolium'', with ''Scaevola taccada'' and ''Tournefortia argentea'' on the beach edge. * ''Hernandia'' forest, dominated at the canopy level by ''H. sonora'': The most representative areas of this forest type are on the eastern, undeveloped part of the atoll. ''Calophyllum inophyllum'' and ''C. nucifera'' are often present. Understory species in this forest are often ''Morinda citrifolia'', ''Cocos'' seedlings, and '' Asplenium nidus'' (bird's nest fern), and occasionally, ''N. oppositifolium'' and ''G. speciosa''. * ''Premna'' shrubland, occurring generally between marshy areas and forested areas: The most conspicuous vegetation is primarily ''P. obtusifolia'', with ''Casuarina equisetifolia'' and ''Scaevola taccada'' on the margins. The dense groundcover consists of species such as '' Fimbristylis cymosa'', '' Ipomoea pes-caprae'' (beach morning glory) and '' Triumfetta procumbens''. ''Premna'' shrubland appears mostly adjacent to the developed areas of the atoll, particularly in the well fields. * Littoral scrub lines almost the entire seashore and lagoon shore of the island. It is dominated by ''S. taccada'', but it also contains scattered coconut trees, ''G. speciosa'' and ''Pisonia grandis''. On the seaward side, it also contains ''Tournefortia argentea'' and ''Suriana maritima''. On the lagoon side, it may also contain '' Lepturus repens'', '' Triumfetta procumbens'' and '' Cyperus ligularis''. Large pockets of ''Barringtonia asiatica'' are also on the eastern edge of the lagoon. * Maintained areas of grasses and sedges routinely mowed: Aerial photographs of the island clearly display large areas of grasslands and park-like savanna upon which the United States military has constructed large outdoor facilities such as antenna fields and the airport. * Mixed native forest, with no dominant canopy species * Marshes are divided into three different types: cattail ('' Typha domingensis''), wetland, and mixed species. Cattail marshes contained almost entirely cattails. These areas are often man-made reservoirs or drainages that have been almost entirely monotypic. Wetlands were based upon vegetation that occurred in the area with fresh water. Mixed-species marshes were highly variable and usually had no standing water.


Wildlife

All the terrestrial and aquatic fauna of Diego Garcia are protected, with the exception of certain game fish, rats, and cats; hefty fines are levied against violators.


Crustaceans

The island is a haven for several types of crustacean; "warrior crabs" (''
Cardisoma carnifex ''Cardisoma carnifex'' is a species of terrestrial crab found in coastal regions from the east coast of Africa and the Red Sea across the Indo-Pacific to the Line Islands and the Tuamotu Archipelago. The range includes parts of northern Austral ...
'') overrun the jungle at night. The extremely large coconut crab or robber crab (''Birgus latro'') is found here in large numbers. Because of the protections provided the species on this atoll, and the isolation of the east rim of the atoll, the species is recorded in greater densities there than anywhere else in its range (339 crabs/ha).


Mammals

No
mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...
species are native on Diego Garcia, with no record of bats.Stoddarrt, D. R. (1971): "Terrestrial fauna of Diego Garcia and other Chagos atolls". In: Stoddart & Taylor (1971), pp. 163–170. Other than rats ('' Rattus rattus''), all "wild" mammal species are feral descendants of domesticated species. During the plantation era, Diego Garcia was home to large herds of Sicilian donkeys ('' Equus asinus''), dozens of horses ('' Equus caballus''), hundreds of dogs ('' Canis familiaris''), and house cats ('' Felis catus''). In 1971, the BIOT Commissioner ordered the extermination of feral dogs following the departure of the last plantation workers, and the program continued through 1975, when the last feral dog was observed and shot. Donkeys, which numbered over 400 in 1972, were down to just 20 individuals in 2005. Natural Resources Management Plan (2005), Appendix G, p. 4.27. The last horse was observed in 1995, and by 2005, just two cats were thought to have survived an island-wide eradication program.


Native birds

The total bird list for the Chagos Archipelago, including Diego Garcia, consists of 91 species, with large breeding populations of 16 species. Although no birds are endemic, internationally important seabird colonies exist. Diego Garcia's seabird community includes thriving populations of species which are rapidly declining in other parts of the Indian Ocean. Large nesting colonies of
brown noddies The brown noddy or common noddy (''Anous stolidus'') is a seabird in the family Laridae. The largest of the noddies, it can be told from the closely related black noddy by its larger size and plumage, which is dark brown rather than black. The b ...
, bridled terns, the lesser noddy,
red-footed booby The red-footed booby (''Sula sula'') is a large seabird of the booby family, Sulidae. Adults always have red feet, but the colour of the plumage varies. They are powerful and agile fliers, but they are clumsy in takeoffs and landings. They are f ...
and lesser frigatebirds exist on Diego Garcia. Other nesting native birds include
red-tailed tropicbird The red-tailed tropicbird (''Phaethon rubricauda'') is a seabird native to tropical parts of the Indian and Pacific Oceans. One of three closely related species of tropicbird (Phaethontidae), it was described by Pieter Boddaert in 1783. Superfic ...
s, wedge-tailed shearwaters,
Audubon's shearwater Audubon's shearwater (''Puffinus lherminieri'') is a common tropical seabird in the petrel family. Sometimes known as the dusky-backed shearwater,Carboneras (1992) the specific epithet honours the French naturalist Félix Louis L'Herminier. Cer ...
,
black-naped tern The black-naped tern (''Sterna sumatrana'') is an oceanic tern mostly found in tropical and subtropical areas of the Pacific and Indian Oceans. It is rarely found inland. Description The tern is about 30 cm long with a wing length of 21 ...
s, white terns, striated herons, and white-breasted waterhens. The 680-hectare
Barton Point Nature Reserve Barton Point Nature Reserve is a 680 ha strict nature reserve on the atoll of Diego Garcia in the British Indian Ocean Territory. It lies at the northern end of the eastern side of the atoll. It holds a breeding colony of red-footed booby, ...
was identified as an
Important Bird Area An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife Int ...
for its large breeding colony of red-footed boobies.


Introduced birds

The island hosts introduced bird species from many regions, including cattle egrets ('' Bubulcus ibis''), Indian barred ground dove, also called the zebra dove (''
Geopelia striata The zebra dove (''Geopelia striata''), also known as the barred ground dove, or barred dove, is a species of bird of the dove family, Columbidae, native to Southeast Asia. They are small birds with a long tail, predominantly brownish-grey in col ...
''), turtle dove (''
Nesoenas picturata The Malagasy turtle dove (''Nesoenas picturatus'') is a bird species in the pigeon and dove family, Columbidae. It is found in Mauritian-Indian Ocean Territory, the Comoros, Madagascar, Mauritius, Mayotte, Réunion, and the Seychelles. Taxono ...
''), Indian mynah ('' Acridotheres tristis''), Madagascar fody ('' Foudia madagascariensis''), and chickens ('' Gallus gallus'').


Terrestrial reptiles and freshwater amphibians

Currently, three lizards and one toad are known to inhabit Diego Garcia, and possibly one snake. All are believed to have been introduced by human activity. The house gecko (''
Hemidactylus frenatus The common house gecko (''Hemidactylus frenatus'') is a gecko native to South and Southeast Asia. It is also known as the Asian house gecko, Pacific house gecko, wall gecko, house lizard, tayoto, chipkali or moon lizard. Most geckos are noctur ...
''), the mourning gecko ('' Lepidodactylus lugubris''), the garden lizard (an agamid) ('' Calotes versicolor''), and the cane toad (''
Bufo marinus The cane toad (''Rhinella marina''), also known as the giant neotropical toad or marine toad, is a large, terrestrial true toad native to South and mainland Central America, but which has been introduced to various islands throughout Ocea ...
''). A viable population of a type of blind snake from the family Typhlopidae may be present, probably the brahminy blind snake (''
Ramphotyphlops braminus ''Indotyphlops braminus'', commonly known as the brahminy blind snake and other names, is a non-venomous blind snake species found mostly in Africa and Asia, but has been introduced in many other parts of the world. They are completely fossoria ...
''). This snake feeds on the larvae, eggs, and pupae of ants and termites, and is about the size of a large earthworm.


Sea turtles

Diego Garcia provides suitable foraging and nesting habitat for both the hawksbill turtle ('' Eretmochelys imbricata'') and the green turtle ('' Chelonia mydas''). Juvenile hawksbills are quite common in the lagoon and at Barachois Sylvane (also known as Turtle Cove) in the southern part of the lagoon. Adult hawksbills and greens are common in the surrounding seas and nest regularly on the ocean-side beaches of the atoll. Hawksbills have been observed nesting during June and July, and from November to March. Greens have been observed nesting in every month; the average female lays three clutches per season, each having an average clutch size of 113 eggs. Diurnal nesting is common in both species. An estimated 300–700 hawksbills and 400–800 greens nest in the Chagos.


Endangered species

Four reptiles and six cetaceans are endangered and may or may not be found on or around Diego Garcia: Hawksbill turtle ('' Eretmocheyls imbricata'') – known; leatherback turtle ('' Dermochelys coriacea'') – possible; green turtle (''Chelonia mydas'') – known; olive ridley turtle ('' Lepidochelys oliveacea'') – possible; sperm whale ('' Physeter macrocephalus'') – possible; sei whale ('' Balaeonoptera borealis'') – possible; finback whale ('' Balaeonoptera physalus'') – possible; Bryde's whale ('' Balaeonoptera edeni'') – possible; blue whale ('' Balaeonoptera musculus'') – possible; humpback whale ('' Megaptera novaeangliae'') – possible; southern right whale ('' Eubalaena australis'') – possible.


United Kingdom military activities

British Forces British Indian Ocean Territories (BFBIOT) is the official name for the
British Armed Forces The British Armed Forces, also known as His Majesty's Armed Forces, are the military forces responsible for the defence of the United Kingdom, its Overseas Territories and the Crown Dependencies. They also promote the UK's wider interests, s ...
deployment at the Permanent Joint Operating Base (PJOB) on Diego Garcia, in the British Indian Ocean Territory.Permanent Joint Operating Bases (PJOBs)
www.gov.uk, 12 December 2012
While the naval and airbase facilities on Diego Garcia are leased to the United States, in practice, it operates as a joint UK-US base, with the UK retaining full and continual access. Diego Garcia is strategically located, offering access to East Africa, the Middle East and Southeast Asia. The base serves as a staging area for the buildup or resupply of military forces prior to an operation. There are approximately 40–50 British military personnel posted on Diego Garcia, most of them from Naval Party 1002 (NP1002). NP1002 forms the island's civil administration.


United States military activities

During the
Cold War The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because the ...
era, following the British withdrawal from East of Suez, the United States was keen to establish a military base in the Indian Ocean to counter Soviet influence and establish American dominance in the region and protect its sea-lanes for oil transportation from the Middle East. The United States saw the atoll as the "Malta of the Indian Ocean" equidistant from all points. The value has been proven many times, with the island providing an "
unsinkable aircraft carrier An unsinkable aircraft carrier is a term sometimes used to refer to a geographically or politically important island that is used to extend the power projection of a military force. Because such an entity is capable of acting as an airbase and i ...
" for the United States during the
Iranian revolution The Iranian Revolution ( fa, انقلاب ایران, Enqelâb-e Irân, ), also known as the Islamic Revolution ( fa, انقلاب اسلامی, Enqelâb-e Eslâmī), was a series of events that culminated in the overthrow of the Pahlavi dynas ...
, the Iraqi invasion of Kuwait,
Operation Desert Fox The 1998 bombing of Iraq (code-named Operation Desert Fox) was a major four-day bombing campaign on Iraqi targets from 16 to 19 December 1998, by the United States and the United Kingdom. On 16 December 1998, President of the United States Bill ...
,
Operation Enduring Freedom Operation Enduring Freedom (OEF) was the official name used synonymously by the U.S. government for both the War in Afghanistan (2001–2014) and the larger-scale Global War on Terrorism. On 7 October 2001, in response to the September 11 at ...
, and
Operation Iraqi Freedom {{Infobox military conflict , conflict = Iraq War {{Nobold, {{lang, ar, حرب العراق (Arabic) {{Nobold, {{lang, ku, شەڕی عێراق (Kurdish languages, Kurdish) , partof = the Iraq conflict (2003–present), I ...
. In the contemporary era, the atoll continues to play a key role in America's approach to the Indian Ocean as a flexible forward military hub that can facilitate a range of offensive activities.Walter C. Ladwig III James R. Holmes & Toshi Yoshihara The United States military facilities on Diego Garcia have been known informally as Camp Justice and, after renaming in July 2006, as Camp Thunder Cove. Formally, the base is known as Naval Support Facility Diego Garcia (the US activity) or Permanent Joint Operating Base (PJOB) Diego Garcia (the UK's term). United States military activities in Diego Garcia have caused friction between India and the United States in the past. Political party CPI(m) in India has repeatedly called for the military base to be dismantled, as they saw the United States naval presence in Diego Garcia as a hindrance to peace in the Indian Ocean. In recent years, relations between India and the United States have improved dramatically. Diego Garcia was the site of several naval exercises between the United States and Indian navies held between 2001 and 2004. Recent construction in support of US military activities on Diego Garcia has included Black Construction/Mace International JV building a 34-metre antenna facility (expected completed by April 2021) and two new 13-metre radomes (expected completed by February 2021); and SJC-BVIL moving underground the overhead power and telephone lines that run from the Navy ammunition area to the Air Force ammunition area along DG1 (expected completed by September 2022).


Naval Support Facility Diego Garcia

Naval Support Facility Diego Garcia provides Base Operating Services to tenant commands located on the island. The command's mission is "To provide logistic support to operational forces forward deployed to the Indian Ocean and Persian Gulf AORs in support of national policy objectives." KBR has run base operations support services at Naval Support Facility Diego Garcia.


United States Air Force units based on Diego Garcia

* 36 MSG,
Pacific Air Force The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...
*Det 1, 730th Air Mobility Squadron,
Air Mobility Command Air Mobility Command (AMC) is a major command (MAJCOM) of the U.S. Air Force. It is headquartered at Scott Air Force Base, Illinois, east of St. Louis, Missouri. Air Mobility Command was established on 1 June 1992, and was formed from elements ...
*Det 1,
21st Space Operations Squadron The 21st Space Operations Squadron (21 SOPS) is a satellite control unit of the Space Delta 6 of the United States Space Force, located at Vandenberg Space Force Base, California. Prior to July 2020, it was part of the 50th Network Operations Gro ...
, a Satellite Control Network Remote Tracking Station, Space Operations Command *Det 2, a
GEODSS The United States Space Surveillance Network (SSN) detects, tracks, catalogs and identifies artificial objects orbiting Earth, e.g. active/inactive satellites, spent rocket bodies, or fragmentation debris. The system is the responsibility of Uni ...
facility, Space Operations Command


United States pre-positioned vessels

The atoll shelters the ships of the United States Marine Pre-positioning Squadron Two. These ships carry equipment and supplies to support a major armed force with tanks, armoured personnel carriers, munitions, fuel, spare parts and even a mobile field hospital. This equipment was used during the Persian Gulf War, when the squadron transported equipment to Saudi Arabia. The ship composition of MPSRON TWO is dynamic. During August 2010 it was composed of the following: * MV ''Capt. Steven L. Bennett'' *USNS ''SGT William R. Button'' (T-AK-3012), *MV ''SSG Edward A. Carter, Jr.'' (T-AK-4544), * MV ''Maj. Bernard F. Fisher'' * USNS ''Lawrence H. Gianella'' *USNS ''SGT Matej Kocak'' (T-AK-3005), *USNS ''1st LT Baldomero Lopez'' (T-AK-3010), *MV ''LTC John U. D. Page'' * USNS ''GYSGT Fred W. Stockham'' Five of these vessels carry supplies for the US Marine Corps sufficient to support a
Marine Air-Ground Task Force Marine Air-Ground Task Force (MAGTF, pronounced MAG-TAF) is a term used by the United States Marine Corps to describe the principal organization for all missions across the range of military operations. MAGTFs are a balanced air-ground, combined ar ...
for 30 days: USNS ''Button'', USNS ''Kocak'', USNS ''Lopez'', USNS ''Stockham'', and USNS ''Fisher''. Prior to 2001, COMPSRON 2 consisted of up to 20 ships, including four Combat Force Ships which provided rapid-response delivery of equipment to ground troops in the United States Army. Three are lighter aboard ships (LASH) which carry barges called
lighters A lighter is a portable device which creates a flame, and can be used to ignite a variety of items, such as cigarettes, gas lighter, fireworks, candles or campfires. It consists of a metal or plastic container filled with a flammable liquid or c ...
that contain Army ammunition to be ferried ashore: MV ''American Cormorant'', SS ''Green Harbour'', (LASH), SS ''Green Valley'', (LASH), MV ''Jeb Stuart'', (LASH). There were logistics vessels to service the rapid delivery requirements of the United States Air Force, United States Navy and Defense Logistics Agency. These included container ships for Air Force munitions, missiles and spare parts; a 500-bed hospital ship, and floating storage and offloading units assigned to
Military Sealift Command Military Sealift Command (MSC) is an organization that controls the replenishment and military transport ships of the United States Navy. Military Sealift Command has the responsibility for providing sealift and ocean transportation for all US m ...
supporting the Defense Logistics Agency, and an offshore petroleum discharge system (OPDS)
tanker Tanker may refer to: Transportation * Tanker, a tank crewman (US) * Tanker (ship), a ship designed to carry bulk liquids ** Chemical tanker, a type of tanker designed to transport chemicals in bulk ** Oil tanker, also known as a petroleum ta ...
. Examples of ships are MV ''Buffalo Soldier'', MV ''Green Ridge'', pre-position tanker USNS ''Henry J. Kaiser'', and tanker
USNS Potomac (T-AO-181) The fifth USNS ''Potomac'' (T-AO-181) was a United States Navy oiler in non-commissioned service with the Military Sea Transportation Service, later Military Sealift Command, from 1976 to 1983. ''Potomac'', sixth U.S. Navy ship to bear the nam ...
.


HF global station

The United States Air Force operates a High Frequency Global Communications System transceiver site located on the south end of the atoll near the GEODSS station. The transceiver is operated remotely from
Andrews Air Force Base Andrews Air Force Base (Andrews AFB, AAFB) is the airfield portion of Joint Base Andrews, which is under the jurisdiction of the United States Air Force. In 2009, Andrews Air Force Base merged with Naval Air Facility Washington to form Joint B ...
and Grand Forks Air Force Base and is locally maintained by NCTS FE personnel.


Naval Computer and Telecommunications Station Far East Detachment Diego Garcia

Naval Computer and Telecommunications Station Far East Detachment Diego Garcia operates a detachment in Diego Garcia. This detachment provides base telephone communications, base network services (Local Network Services Center), pier connectivity services, and an AN/GSC-39C SHF satellite terminal, operates the Hydroacoustic Data Acquisition System, and performs on-site maintenance for the remotely operated Air Force
HF-GCS The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface a ...
terminal. In July 2023, Reuters confirmed an underwater fiber-optic cable spur from the Oman Australia Cable was constructed to Diego Garcia during 2022.


Naval Security Group Detachment Diego Garcia

Naval Security Group The Naval Security Group (NAVSECGRU) was an organization within the United States Navy, tasked with intelligence gathering and denial of intelligence to adversaries. A large part of this is signals intelligence gathering, cryptology and information ...
detachment Diego Garcia was disestablished on 30 September 2005. Remaining essential operations were transferred to a contractor. The large AN/AX-16 High Frequency
Radio direction finding Direction finding (DF), or radio direction finding (RDF), isin accordance with International Telecommunication Union (ITU)defined as radio location that uses the reception of radio waves to determine the direction in which a radio station ...
Circularly Disposed Antenna Array has been demolished, but the four satellite antenna radomes around the site remain .


Space Shuttle

The island was designated as one of the emergency landing sites worldwide for the NASA Space Shuttle. None of these facilities were ever used throughout the life of the shuttle program.


Cargo service

All consumable food and equipment are brought to Diego Garcia by sea or air, and all non-biodegradable waste is shipped off the island as well. From 1971 to 1973, United States Navy LSTs provided this service. Beginning in 1973, civilian ships were contracted to provide these services. From 2004 to 2009, the US-flagged container ship MV ''Baffin Strait'', often referred to as the "DGAR shuttle", delivered 250 containers every month from Singapore to Diego Garcia. The ship delivered "more than 200,000 tons of cargo to the island each year". On the return trip to Singapore, it carried recyclable metals. In 2004, TransAtlantic Lines outbid Sealift Incorporated for the transport contract between Singapore and Diego Garcia. The route had previously been serviced by Sealift Inc.'s ''MV Sagamore'', crewed by members of American Maritime Officers and
Seafarers' International Union The Seafarers International Union or SIU is an organization of 12 autonomous labor unions of mariners, fishermen and boatmen working aboard vessels flagged in the United States or Canada. Michael Sacco has been its president since 1988. T ...
. TransAtlantic Lines reportedly won the contract by approximately 10 per cent, representing a price difference of about US$2.7 million. The ''Baffin Straits'' charter ran from 10 January 2005, to 30 September 2008, at a daily rate of US$12,550.


See also

*
James Horsburgh James Horsburgh (28 September 176214 May 1836) was a Scottish hydrographer. He worked for the British East India Company, (EIC) and mapped many seaways around Singapore in the late 18th century and early 19th century. Life Born at Elie, Fife, Hor ...
*
List of British Army installations This is a list of British Army Installations in the United Kingdom and overseas. British overseas bases are concentrated in Cyprus, Brunei, Kenya, the South Atlantic and Germany. Overseas installations Belize British Overseas Territories Berm ...
* List of United States military bases * Robert Moresby *''
Stealing a Nation ''Stealing a Nation'' is a 2004 Granada Television documentary about the British–American clandestine operation that saw the expulsion of the Chagossian population who have lived on Diego Garcia and neighbouring islands since the late 18th c ...
''


References


Bibliography

* * * * * * * * * * *


Further reading

* * Ladwig III, Walter C., Andrew S. Erickson, and Justin D. Mikolay
"Diego Garcia and American Security in the Indian Ocean,"
in Carnes Lord and Andrew Erickson ''Rebalancing US Forces: Basing and Forward Presence in the Asia Pacific'' Annapolis, MD: Naval Institute Press, 2014, pp. 131–180. * Ladwig III, Walter C., *Pilger, John, ''Freedom Next Time'' (2007). *Urish, Daniel W., ''Coral, Copra, and Concrete: An Illustrated Memoir of Diego Garcia Atoll'' (2015). *US Naval Support Facility Diego Garcia "Integrated Natural Resources Management Plan," September 2005. *Wenban-Smith, N. and Carter, M., ''Chagos: A History, Exploration, Exploitation, Expulsion'' Published by Chagos Conservation Trust, London (2016). *Winchester, Simon, ''Outposts: Journeys to the Surviving Relics of the British Empire'' (2004).


External links


BBC News Exiles lose appeal over benefits
02/11/07
The Chagos Conservation TrustThe Chagos Environmental NetworkCIA World Factbook: British Indian Ocean Territory
*
Jonathan Freedland Jonathan Saul Freedland (born 25 February 1967) is a British journalist who writes a weekly column for ''The Guardian''. He presents BBC Radio 4's contemporary history series ''The Long View''. Freedland also writes thrillers, mainly under the ...

"A Black and Disgraceful Site"
'' The New York Review of Books'', 28 May 2009. *Erickson, Andrew S., Walter C. Ladwig III and Justin D. Mikola
"Diego Garcia and the United States' Emerging Indian Ocean Strategy,"
''Asian Security,'' Vol. 6, No. 3 (Autumn 2010), pp. 214–237.
Diego Garcia Online: Information for locals of Diego Garcia.

Recording of ''The Island''
, a jazz opera commissioned and broadcast in the 1960s on radio themed on events in Garcia Diego written by William Russo, words by Adrian Mitchell, performed by the Russo Orchestra sung by