…VFR flight is possible when there are no clouds within a vertical distance of 150m above, 300m below, and 600m horizontally from the aircraft, and flight visibility is 5km or more (1500m or more in airspace outside of the controlled zone). When flight meteorological conditions fall below the limit of VMC, they are called instrument meteorological conditions (IFR) (IMC), and the aircraft must operate under IFR. The lowest meteorological conditions that allow takeoff and landing under IFR are the minimum meteorological conditions. … *Some of the terms mentioned in "IFR meteorological condition" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…飛行中では航空機からの鉛直距離で上方150m,下方300m,水平距離600mの範囲内に雲がなく,飛行視程が5km以上(管制圏外の空域では1500m以上)の条件時にはVFRの飛行ができる。飛行気象状態がVMCの限界以下になれば,これを計器気象状態IFR meteorological condition(IMC)といい,航空機はIFRをとらなければならない。IFRで離着陸できる気象条件の最下限が最低気象条件である。… ※「IFR meteorological condition」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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