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英语 词库
precision approach runway
航空	One of the following types of runways intended for the operation of aircraft using instrument approach procedures: 1. Non-precision approach runway. An instrument runway served by visual aids and a non-visual aid providing at least directional guidance adequate for a straight-in approach. 2. Precision approach runway, category I. An instrument runway served by ILS and/or MLS and visual aids intended for operations with a decision height not lower than 60 m 200 ft and either a visibility not less than 800 m or a runway visual range not less than 550 m. 3. Precision approach runway, category II. An instrument runway served by ILS and/or MLS and visual aids intended for operations with a decision height lower than 60 m 200 ft but not lower than 30 m 100 ft and a runway visual range not less than 350 m. 4. Precision approach runway, category III. An instrument runway served by ILS and/or MLS to and along the surface of the runway and: A — intended for operations with a decision height lower than 30 m 100 ft, or no decision height and a runway visual range not less than 200 m. B — intended for operations with a decision height lower than 15 m 50 ft, or no decision height and a runway visual range less than 200 m but not less than 50 m. C — intended for operations with no decision height and no runway visual range limitations. Note 1. — See Annex 10, Volume I, for related ILS and/or MLS specifications. Note 2. — Visual aids need not necessarily be matched to the scale of non-visual aids provided. The criterion for the selection of visual aids is the conditions in which operations are intended to be conducted.

precision : 4 短语, 3 学科

微软	1
数学	1
经济	2