A navigation system developed to alleviate the increasing air traffic, especially congestion around navigational radio facilities and terminals, and to make effective use of airspace. It is abbreviated as RNAV. Rather than being limited to the traditional air routes set between navigational radio facilities, specific or arbitrary points called waypoints are set on a map, and in principle, aircraft fly along routes connecting the waypoints. Waypoints are determined by latitude and longitude coordinates or the angle from a VOR station and the distance from a distance measuring device (DME), and an on-board computer calculates the flight route between the specified waypoints based on this information. When an inertial navigation system is used, in addition to the flight route between waypoints, it is also possible to add a function to set a route parallel to it. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
増加する航空交通,とくに航行援助無線施設およびターミナル付近の混雑を緩和し,空域を有効に利用する目的で開発されている航法システム。RNAVと略称される。従来の航行援助無線施設間を結んで設定された航空路にこだわらず,地図上で,ウェーポイントと呼ばれる特定または任意の点を定め,原則としてウェーポイント間を結んだ経路を飛行する。ウェーポイントは緯度・経度座標またはVOR局からの角度と距離測定装置(DME)からの距離で定められ,機上のコンピューターがその情報に基づいて所定のウェーポイント間の飛行経路を算出するもので,慣性航法装置を用いる場合,ウェーポイント間の飛行経路のほか,これと平行な経路を設定する機能を付加することもできる。
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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