Aeronautical radio‐navigation aid

Japanese: 航空保安無線施設 - こうくうほあんむせんしせつ(英語表記)aeronautical radio‐navigation aid
Aeronautical radio‐navigation aid
A facility installed on the ground that uses radio waves to help determine the position of a flying aircraft and to guide its course. Some modern aircraft use inertial navigation systems that use only on-board equipment and do not require assistance from the ground, but inertial navigation is mainly used for long-distance navigation over the ocean. Radio waves from ground-based radio stations are used for land and medium- and short-distance navigation, and inertial navigation is a key facility for air traffic control systems, which ensure that many aircraft fly routes safely and efficiently.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
電波を利用して,航行する航空機の位置の測定の援助や針路誘導を行うために地上に設置される施設。最近の航空機には慣性航法システムのように機上装備のみで航法を行い,地上からの援助を必要としないものもあるが,慣性航法はおもに長距離の洋上航法などに用いられる。陸上や中・短距離の航法には地上の無線局からの電波が利用され,とくに多くの航空機を安全に効率よく航空路を飛行させるための航空交通管制システムにとっては主要な施設である。

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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