1.
ICAO airport code
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The ICAO airport code or location indicator is a four-character alphanumeric code designating aerodromes around the world. ICAO codes are used to identify other aviation facilities such as weather stations, International Flight Service Stations or Area Control Centers. Flight information regions are identified by a unique ICAO-code. Code selections in North America were based on existing radio station identifiers, for example, radio stations in Canada were already starting with C, so it seemed logical to begin Canadian airport identifiers with Cxxx. The United States had many pre-existing airports with established mnemonic codes and their ICAO codes were formed simply by prepending a K to the existing codes, as half the radio station identifiers in the US began with K. Most ICAO codes outside the US and Canada have a geographical structure. Most of the rest of the world was classified in a more planned top-down manner, thus Uxxx referred to the Soviet Union with the second letter denoting the specific region within it, and so forth. Europe had too many locations for one starting letter, so it was split into Exxx for northern Europe. The second letter was more specific, EGxx was the United Kingdom, EDxx was West Germany, ETxx was East Germany, LExx was Spain, LAxx was Albania, France was designated LFxx, as the counterpart EFxx was the unambiguously northern Finland. ICAO codes are separate and different from IATA codes, which are used for airline timetables, reservations. For example, the IATA code for Londons Heathrow Airport is LHR, in general IATA codes are usually derived from the name of the airport or the city it serves, while ICAO codes are distributed by region and country. Far more aerodromes have ICAO codes than IATA codes, and to add to the confusion IATA codes are assigned to railway stations. Unlike the IATA codes, the ICAO codes generally have a structure and are comprehensive. In general, the first letter is allocated by continent and represents a country or group of countries within that continent, the second letter generally represents a country within that region, and the remaining two are used to identify each airport. The exception to rule is larger countries that have single-letter country codes. In either case, ICAO codes generally provide geographical context unlike IATA codes, for example, if one knows that the ICAO code for Heathrow is EGLL, then one can deduce that the airport EGGP is somewhere in the UK. On the other hand, knowing that the IATA code for Heathrow is LHR does not enable one to deduce the location of the airport LHV with any greater certainty, there are a few exceptions to the regional structure of the ICAO code made for political or administrative reasons. Similarly Saint Pierre and Miquelon is controlled by France, and airports there are assigned LFxx as though they were in Europe, further, in region L, all available 2-letter prefixes have been exhausted and thus no additional countries can be added
2.
Air Ministry
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The Air Ministry was a department of the Government of the United Kingdom with the responsibility of managing the affairs of the Royal Air Force, that existed from 1918 to 1964. It was under the authority of the Secretary of State for Air. The new Air Committee was composed of representatives of the two war ministries, and although it could make recommendations, it lacked executive authority. The recommendations of the Air Committee had to be ratified by the Admiralty Board and the Imperial General Staff and, in consequence, the Committee was not particularly effective. The increasing separation of army and naval aviation from 1912 to 1914 only exacerbated the Air Committees ineffectiveness and it was the supply problems to which an attempt at rectification was first made. This committee was titled the Joint War Air Committee, and its chairman was Lord Derby and it was also at the meeting on 15 February that Curzon proposed the creation of an Air Ministry. As with the pre-war Air Committee, the Joint War Air Committee lacked any executive powers, after only eight sittings, Lord Derby resigned from the Committee, stating that It appears to me quite impossible to bring the two wings closer together. Unless and until the system of the Air Service is changed. The next attempt to establish effective co-ordination between the two air services was the creation of an Air Board, the first Air Board came into being on 15 May 1916 with Lord Curzon as its chairman. The inclusion of Curzon, a Cabinet Minister, and other political figures was intended to give the Air Board greater status than the Joint War Air Committee, in October 1916 the Air Board published its first report which was highly critical of the arrangements within the British air services. In January 1917 the Prime Minister David Lloyd George replaced the chairman Lord Curzon with Lord Cowdray. Godfrey Paine, who served in the newly created post of Fifth Sea Lord and Director of Naval Aviation, sat on the board, despite attempts at reorganization of the Air Board, the earlier problems failed to be completely resolved. In addition, the number of German air raids against Great Britain led to public disquiet. Towards the end of the First World War, on 17 August 1917, Lord Rothermere was appointed the first Air Minister. Later, in 1919, it moved to Adastral House on Kingsway, the creation of the Air Ministry resulted in the disestablishment of the Army Councils post of Director-General of Military Aeronautics. In April 1921 David Lloyd George appointed Frederick Guest as Secretary of State for Air, more importantly in the long term he was also responsible for the appointment of Sir Sefton Brancker to develop civil aviation. With the fall of Lloyd George in October 1922 Sir Samuel Hoare became the Secretary of State for Air. He was the first Secretary to have a seat in the Cabinet, and remained in the post until January 1924, a supporter of airships, Thomson was responsible for the Imperial Airship Scheme, which involved the construction of R101 at the Royal Airship Works at Cardington
3.
Royal Air Force
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The Royal Air Force is the United Kingdoms aerial warfare force. Formed towards the end of the First World War on 1 April 1918, following victory over the Central Powers in 1918 the RAF emerged as, at the time, the largest air force in the world. The RAF describe its mission statement as, an agile, adaptable and capable Air Force that, person for person, is second to none, and that makes a decisive air power contribution in support of the UK Defence Mission. The mission statement is supported by the RAFs definition of air power, Air power is defined as the ability to project power from the air and space to influence the behaviour of people or the course of events. Today the Royal Air Force maintains a fleet of various types of aircraft. The majority of the RAFs rotary-wing aircraft form part of the tri-service Joint Helicopter Command in support of ground forces, most of the RAFs aircraft and personnel are based in the UK, with many others serving on operations or at long-established overseas bases. It was founded on 1 April 1918, with headquarters located in the former Hotel Cecil, during the First World War, by the amalgamation of the Royal Flying Corps, at that time it was the largest air force in the world. The RAFs naval aviation branch, the Fleet Air Arm, was founded in 1924, the RAF developed the doctrine of strategic bombing which led to the construction of long-range bombers and became its main bombing strategy in the Second World War. The RAF underwent rapid expansion prior to and during the Second World War, under the British Commonwealth Air Training Plan of December 1939, the air forces of British Commonwealth countries trained and formed Article XV squadrons for service with RAF formations. Many individual personnel from countries, and exiles from occupied Europe. By the end of the war the Royal Canadian Air Force had contributed more than 30 squadrons to serve in RAF formations, additionally, the Royal Australian Air Force represented around nine percent of all RAF personnel who served in the European and Mediterranean theatres. In the Battle of Britain in 1940, the RAF defended the skies over Britain against the numerically superior German Luftwaffe, the largest RAF effort during the war was the strategic bombing campaign against Germany by Bomber Command. Following victory in the Second World War, the RAF underwent significant re-organisation, during the early stages of the Cold War, one of the first major operations undertaken by the Royal Air Force was in 1948 and the Berlin Airlift, codenamed Operation Plainfire. Before Britain developed its own nuclear weapons the RAF was provided with American nuclear weapons under Project E and these were initially armed with nuclear gravity bombs, later being equipped with the Blue Steel missile. Following the development of the Royal Navys Polaris submarines, the nuclear deterrent passed to the navys submarines on 30 June 1969. With the introduction of Polaris, the RAFs strategic nuclear role was reduced to a tactical one and this tactical role was continued by the V bombers into the 1980s and until 1998 by Tornado GR1s. For much of the Cold War the primary role of the RAF was the defence of Western Europe against potential attack by the Soviet Union, with many squadrons based in West Germany. With the decline of the British Empire, global operations were scaled back, despite this, the RAF fought in many battles in the Cold War period
4.
United States Army Air Forces
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Each of these forces had a commanding general who reported directly to the Army Chief of Staff. S. Army to control its own installations and support personnel, the peak size of the AAF during the Second World War was over 2.4 million men and women in service and nearly 80,000 aircraft by 1944, and 783 domestic bases in December 1943. By V-E Day, the Army Air Forces had 1.25 million men stationed overseas, in its expansion and conduct of the war, the AAF became more than just an arm of the greater organization. By the end of World War II, the Army Air Forces had become virtually an independent service and this contrast between theory and fact is. fundamental to an understanding of the AAF. Gen. Billy Mitchell that led to his later court-martial, a strategy stressing precision bombing of industrial targets by heavily armed, long-range bombers emerged, formulated by the men who would become its leaders. Since 1920, control of units had resided with commanders of the corps areas. Both were created in 1933 when a conflict with Cuba seemed possible following a coup détat. Activation of GHQ Air Force represented a compromise between strategic airpower advocates and ground force commanders who demanded that the Air Corps mission remain tied to that of the land forces. GHQ Air Force organized combat groups administratively into a force of three wings deployed to the Atlantic, Pacific, and Gulf coasts but was small in comparison to European air forces. Corps area commanders continued to control over airfields and administration of personnel. The expected activation of Army General Headquarters prompted Army Chief of Staff George C. Marshall to request a study from Chief of the Air Corps Maj. Gen. Henry H. Arnold resulting on 5 October 1940 in a proposal for creation of an air staff, unification of the air arm under one commander, and equality with the ground and supply forces. Marshall implemented a compromise that the Air Corps found entirely inadequate, naming Arnold as acting Deputy Chief of Staff for Air but rejecting all organizational points of his proposal. GHQ Air Force instead was assigned to the control of Army General Headquarters, although the latter was a training and not an operational component, when it was activated in November 1940. A division of the GHQ Air Force into four air defense districts on 19 October 1940 was concurrent with the creation of air forces to defend Hawaii. The air districts were converted in March 1941 into numbered air forces with an organization of 54 groups. Marshall had come to the view that the air forces needed a simpler system, Arnold and Marshall agreed that the AAF would enjoy a general autonomy within the War Department until the end of the war, while its commanders would cease lobbying for independence. Marshall, a proponent of airpower, left understood that the Air Force would likely achieve its independence following the war
5.
Chilbolton
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Chilbolton is a village and civil parish in Hampshire, England, near to Stockbridge. It is situated 18 miles north of Southampton and 4 miles south of Andover and its most notable feature is the Chilbolton Observatory situated on the disused RAF Chilbolton airfield. The parish church of St Mary the Less dates back to the 12th century, the River Test runs through Chilbolton Common. Chilbolton is recorded in the Domesday Book under the name Cilbodentune, Chilbolton and Wherwell Website ANY-village for Chilbolton Publications featuring Chilbolton
6.
Hampshire
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Hampshire is a county on the southern coast of England in the United Kingdom. The county town of Hampshire is Winchester, the capital city of England. The larger South Hampshire metropolitan area has a population of 1,547,000, Hampshire is notable for housing the birthplaces of the Royal Navy, British Army, and Royal Air Force. It is bordered by Dorset to the west, Wiltshire to the north-west, Berkshire to the north, Surrey to the north-east, the southern boundary is the coastline of the English Channel and the Solent, facing the Isle of Wight. At its greatest size in 1890, Hampshire was the fifth largest county in England and it now has an overall area of 3,700 square kilometres, and measures about 86 kilometres east–west and 76 kilometres north–south. Hampshires tourist attractions include many seaside resorts and two parks, the New Forest and the South Downs. Hampshire has a maritime history and two of Europes largest ports, Portsmouth and Southampton, lie on its coast. The county is famed as home of writers Jane Austen and Charles Dickens, Hampshire takes its name from the settlement that is now the city of Southampton. Southampton was known in Old English as Hamtun, roughly meaning village-town, the old name was recorded in the Domesday book as Hantescire, and it is from this spelling that the modern abbreviation Hants derives. From 1889 until 1959, the county was named the County of Southampton and has also been known as Southamptonshire. The region is believed to have continuously occupied since the end of the last Ice Age about 12,000 BCE. At this time Britain was still attached to the European continent and was covered with deciduous woodland. The first inhabitants came overland from Europe, these were anatomically and behaviourally modern humans, notable sites from this period include Bouldnor Cliff. Agriculture had arrived in southern Britain by 4000 BCE, and with it a neolithic culture, some deforestation took place at that time, although it was during the Bronze Age, beginning in 2200 BCE, that this became more widespread and systematic. Hampshire has few monuments to show from early periods, although nearby Stonehenge was built in several phases at some time between 3100 BCE and 2200 BCE. It is maintained that by this period the people of Britain predominantly spoke a Celtic language, hillforts largely declined in importance in the second half of the second century BCE, with many being abandoned. Julius Caesar invaded southeastern England briefly in 55 and again in 54 BCE, notable sites from this period include Hengistbury Head, which was a major port. There is a Museum of the Iron Age in Andover, the Romans invaded Britain again in 43 CE, and Hampshire was incorporated into the Roman province of Britannia very quickly
7.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
8.
Runway
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According to the International Civil Aviation Organization, a runway is a defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft. Runways may be a surface or a natural surface. Runways are named by a number between 01 and 36, which is generally the magnetic azimuth of the heading in decadegrees. This heading differs from true north by the magnetic declination. A runway numbered 09 points east, runway 18 is south, runway 27 points west, when taking off from or landing on runway 09, a plane would be heading 90°. A runway can normally be used in both directions, and is named for each separately, e. g. runway 33 in one direction is runway 15 when used in the other. The two numbers usually differ by 18, Runway Zero Three Left becomes Runway Two One Right when used in the opposite direction. In some countries, if parallel runways are too close to each other, at large airports with four or more parallel runways some runway identifiers are shifted by 10 degrees to avoid the ambiguity that would result with more than three parallel runways. For example, in Los Angeles, this results in runways 6L, 6R, 7L. At Dallas/Fort Worth International Airport, there are five parallel runways, named 17L, 17C, 17R, 18L, for clarity in radio communications, each digit in the runway name is pronounced individually, runway three six, runway one four, etc. A leading zero, for example in runway zero six or runway zero one left, is included for all ICAO, however, most U. S. civil aviation airports drop the leading zero as required by FAA regulation. This also includes some military airfields such as Cairns Army Airfield and this American anomaly may lead to inconsistencies in conversations between American pilots and controllers in other countries. It is very common in a such as Canada for a controller to clear an incoming American aircraft to, for example, runway 04. In flight simulation programs those of American origin might apply U. S. usage to airports around the world, for example, runway 05 at Halifax will appear on the program as the single digit 5 rather than 05. Runway designations change over time because the magnetic poles slowly drift on the Earths surface, depending on the airport location and how much drift takes place, it may be necessary over time to change the runway designation. As runways are designated with headings rounded to the nearest 10 degrees, for example, if the magnetic heading of a runway is 233 degrees, it would be designated Runway 23. If the magnetic heading changed downwards by 5 degrees to 228, if on the other hand the original magnetic heading was 226, and the heading decreased by only 2 degrees to 224, the runway should become Runway 22. Because the drift itself is slow, runway designation changes are uncommon
This article incorporates public domain material from the Air Force Historical Research Agency website http://www.afhra.af.mil/.
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