…Here, visibility is the maximum distance at which a black target of a suitable size can be identified against the sky at the horizon. Runway visual range (usually called RVR) is the distance to the farthest target in the direction of the runway that can be seen from a height of 5m above the ground at the position of the runway where the first wheels touch the ground when an aircraft takes off or lands. In addition to the runway, runway markings, high-intensity runway lights, and centerline lights are used as targets. … *Some of the terminology that mentions "runway visual range" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ここで視程とは地平線の空を背景とする適当な大きさの黒い目標を識別できる最大距離である。滑走路視距離runway visual rangeふつうRVRと呼ばれ,航空機が離着陸する際,最初に車輪を接地する滑走路の位置で,地上5mの高さから視認できる滑走路方向の最も遠い目標までの距離をいう。目標には滑走路のほか滑走路標識,高光度滑走路灯や中心線灯が用いられる。… ※「runway visual range」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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