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Extremely detailed chart of Perim Island (also called Mayyun in Arabic) in the Strait of Mandeb, at the southern entrance to the Red Sea.

Perim is a small but geopolitically important island at the entrance to the Red Sea. With the beginning of the French-backed Suez Canal project in the 1850s, the United Kingdom became convinced of the need to offset French power along the route. A number of options were undertaken to counter the French, including the occupation of Perim in 1856. The island was occupied by the Governor of Bombay, under the justification that it had been claimed by the East India Company in 1799 and was therefore already a dependency of India.

Perim's inner harbor, as illustrated on the map, could accommodate very large vessels. It was consequently thought a good place for a coating station, which was established in the 1880s. Water for the steam engine condensers was also provided on Perim (as labeled on the map).

Shortly before this map was printed, during World War I, Ottoman forces landed on the island from Aden to attempt to take it and cut British communication through the Red Sea. The invasion was fought back and troops landed by the Royal Navy at Aden ended any future threat to the island.

In 1967, the British attempted to have the island internationalized, to ensure the long term security of the Red Sea-Suez route, but this was refused. In that year the island was handed over to the People's Republic of South Yemen.

In 2008, the island was to be a component in the so-called Bridge of Horns, which was to link Yemen and Djibouti and be the largest bridge in the world. The Dubai-backed project did not proceed beyond the planning stage.

The island was the site of a battle during the Yemeni Civil War, in which previously displaced Perim natives took the island back from Houthis with the aid of U.A.E. forces.

British Admiralty Biography

The British Admiralty has produced nautical charts since 1795 under the auspices of the United Kingdom Hydrographic Office (HO). Its main task was to provide the Royal Navy with navigational products and service, but since 1821 it has also sold charts to the public.

In 1795, King George III appointed Alexander Dalrymple, a pedantic geographer, to consolidate, catalogue, and improve the Royal Navy’s charts. He produced the first chart as the Hydrographer to the Admiralty in 1802. Dalrymple, known for his sticky personality, served until his death in 1808, when he was succeeded by Captain Thomas Hurd. The HO has been run by naval officers ever since.

Hurd professionalized the office and increased its efficiency. He was succeeded by the Arctic explorer Captain William Parry in 1823. By 1825, the HO was offering over seven hundred charts and views for sale. Under Parry, the HO also began to participate in exploratory expeditions. The first was a joint French-Spanish-British trip to the South Atlantic, a voyage organized in part by the Royal Society of London.

In 1829, Rear-Admiral Sir Francis Beaufort was appointed Hydrographer Royal. Under his management, the HO introduced the wind force scale named for him, as well as began issuing official tide tables (1833). It was under Beaufort that HMS Beagle completed several surveying missions, including its most famous voyage commanded by Captain FitzRoy with Charles Darwin onboard. When Beaufort retired in 1855, the HO had nearly two thousand charts in its catalog.

Later in the nineteenth century, the HO supported the Challenger expedition, which is credited with helping to found the discipline of oceanography. The HO participated in the International Meridian Conference which decided on the Greenwich Meridian as the Prime Meridian. Regulation and standardization of oceanic and navigational measures continued into the twentieth century, with the HO participating at the first International Hydrographic Organization meeting in 1921.

During World War II, the HO chart making facility moved to Taunton, the first purpose-built building it ever inhabited. In 1953, the first purpose-built survey ship went to sea, the HMS Vidal. Today, there is an entire class of survey vessels that make up the Royal Navy’s Hydrographic Squadron. The HO began to computerize their charts in the late 1960s and early 1970s. In 1968, the compilation staff also came to Taunton, and the HO continues to work from there today.