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An aircraft approach category is a grouping differentiating aircraft based on the speed at which the aircraft approaches a runway for a landing. == Categories == Specifically the VRef,of a given aircraft, at the maximum certificated landing weight (if VRef is not specified, the approach speed is given as the VS0 multiplied by 1.3) . VRef, VS0, and the maximum certificated landing weight are those values as established for the aircraft by the certification authority of the country of registry. An aircraft shall fit in only one category. If it is necessary to manoeuvre at speeds in excess of the upper limit of a speed range for a category, the minimums for the next higher category should be used. For example, an aircraft which falls in Category A, but is circling to land at a speed in excess of 90 knots, should use the approach Category B minimums when circling to land.〔14 CFR Part 97.3〕 The categories are as follows: * Category A: Speed 90 knots or less. * Category B: Between 91 and 120 knots. * Category C: Between 121 and 140 knots. * Category D: Between 141 knots and 165 knots. * Category E: Speed 166 knots or more. ''Category E contains only certain Military Aircraft.'' 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「Aircraft approach category」の詳細全文を読む スポンサード リンク
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