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A primary Forward Air Control function is ensuring the safety of friendly troops during close air support. Enemy targets in the Front line ("Forward Edge of the Battle Area" in US terminology) are often close to friendly forces and therefore friendly forces are at risk of friendly fire through proximity during air attack. The danger is twofold: the bombing pilot cannot identify the target clearly, and is not aware of the locations of friendly forces. Camouflage, constantly changing situation and the fog of war all increase the risk. Present day doctrine holds that Forward Air Controllers (FACs) are not needed for air interdiction, although there has been such use of FACs in the past. A secondary concern of forward air controllers is the avoidance of harm to noncombatants in the strike area. ==Early air ground support efforts== Even as close air support began during World War I, there were pioneer attempts to direct the trench strafing by the ground troops marking their positions by laying out signal panels on the ground, firing flares, or lighting smoke signals. Aircrews had difficulty communicating with the ground troops; they would drop messages or use messenger pigeons.〔Hallion, pp. 20 - 21, 38 - 40.〕 Benno Fiala von Fernbrugg, an Austro-Hungarian pilot, pioneered the use of radio for fire control; at the Battle of Gorlice he used a radio transmitter in his airplane to send changes via morse code to an artillery battery on the ground.〔Chant, p. 86.〕 Colonel Billy Mitchell also equipped his Spad XVI command airplane with a radio, and the Germans experimented with radios in their Junkers J.I all-metal-structure, armored-fuselage sesquiplanes.〔Hallion, p. 21.〕 The Marines in the so-called Banana Republic wars of the 1920s and 1930s used Curtiss Falcons and Vought Corsairs that were equipped with radios powered by airstream-driven generators, with a range of up to 50 miles. Another method of communication was for the pilot to drop messages in a weighted container, and to swoop in and pick up messages hung out by ground troops on a "clothesline" between poles. The objective was aerial reconnaissance and air attack. Using these various methods, the Marine pilots combined the functions of both FAC and strike aircraft, as they carried out their own air attacks on the Sandinistas in Nicaragua in 1927. The commonality of pilots and ground troops belonging to the same service led to a close air support role similar to that sought by use of FACs, without the actual use of a FAC.〔Hallion, pp. 70 - 74.〕 On 27 October 1927, a Marine patrol used cloth panels to direct an air strike—arguably the first forward air control mission.〔Churchill, p. 2.〕 This distinctive U.S. Marine doctrine of interaction between Marine infantry and aviation would persist, recurring in the Korean War and the Vietnam War.〔Lester, p. 7.〕 French colonial operations in the Rif War from 1920–1926 used air power similarly to the Marines in Nicaragua against the Sandinistas but in a different environment, the desert. The French Mobile Groups of combined arms not only used aircraft for scouting and air attack; the airplanes carried trained artillery officers as observers. These aerial observers called in artillery fire via radio.〔Hallion, pp. 69 - 70.〕 The German military noted close air support operations in the Spanish Civil War and decided to develop its forward air control capability. By 1939, they had forward air control teams called Ground Attack Teams attached to every headquarters from regiment level upwards. These Teams directed air strikes flown by Luftwaffe close air support units. Extensive coordinated training by air and ground troops had raised this system to state of the art by the beginning of World War II.〔Shlight, pp. 29, 32.〕 When the United States Army Air Forces (USAAF) was founded on 20 June 1941, it included provisions for Air Ground Control Parties to serve with the United States Army at the division, corps, and Army headquarters. The Air Ground Control Parties functions were to regulate bombing and artillery in close conjunction with the ground troops, as well as assess bomb damage. They were thus the first of similar units to try to fulfill the functions of the FAC without being airborne.〔Churchill, pp. 1 - 2.〕 However, these units were often plagued by turf wars and cumbersome communications between the respective armies and air forces involved. As a result, it could take hours for an air strike requested by ground troops to actually show up.〔Hallion, pp. 149 - 150.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「forward air control」の詳細全文を読む スポンサード リンク
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