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police aviation
Police aviation is the use of rotary-wing aircraft, fixed-wing aircraft, nonrigid-wing aircraft or lighter-than-air aircraft in police operations. Police services commonly use aircraft for traffic control, ground support, search and rescue, high-speed car pursuits, observation, air patrol and control of large-scale public events and/or public order incidents. In some major cities, police rotary-wing aircraft are also used as air transportation for personnel belonging to SWAT-style units. In large, sparsely populated areas, fixed-wing aircraft are sometimes used to transport personnel and equipment.
==History==
The first police aviation department was established in New York City in 1919 with two fixed-wing aircraft. Fixed-wing aircraft have generally been replaced by more versatile rotary-wing aircraft since the late 1940s. However, fixed-wing aircraft are still used in some missions, such as border patrol, as their higher speed and greater operating altitude allow larger areas to be covered.〔
In 1921, the British airship R33 was used to help the police with traffic control around horse racing events at Epsom and Ascot.〔(【引用サイトリンク】title=R33 - G F A A G 1916- 1921 : Early Life )〕
A large mural on the side of St. George's Town Hall in the East End of London depicting the 1936 Battle of Cable Street public order incident includes the police autogyro,〔(【引用サイトリンク】title=The Battle of Cable Street mural, Shadwell )〕 that was present during the incident, overhead.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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