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Braking action in aviation is a description of how easily an aircraft can stop after landing on a runway. Either pilots or airport management can report the braking action according to the Federal Aviation Administration of the United States.〔(3-3-4. BRAKING ACTION )〕 When reporting braking action, any of the following terms may be used: Good; Medium (medium used to be known as Fair, though Fair is still in use in the US〔); Poor; Nil - bad or no braking action. If an air traffic controller receives a braking action report worse than good, an advisory must be included in the Automatic Terminal Information Service ("Braking Action Advisories are in effect"). ==Europe== In Europe this differs from the above reference. Braking action reports in Europe are an indication/declaration of reduced friction on a runway due to runway contamination (see Landing performance, under the Runway Surface section) which may impact an aircraft's crosswind limits. European reports have nothing to do with stopping distances on a runway, though they should alert pilots that stopping distances will also be affected. Landing distances are empirically dealt with by landing performance data on dry/wet/contaminated runways for each aircraft type.〔(【引用サイトリンク】url=http://www.aopa.org/asf/publications/SB03.pdf )〕 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「braking action」の詳細全文を読む スポンサード リンク
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