Omega Nautical Charts

Japanese: オメガ海図 - おめがかいず
Omega Nautical Charts

...If a hyperbola based on another set of stations is obtained, the ship's position can be found as the intersection of the two lines. Radio navigation charts are charts that plot this hyperbola (radio lattice), and include Loran charts and Omega charts for ocean navigation, and Decca charts for coastal navigation. In addition to the above navigational charts, in a broader sense, special charts for navigational reference, academic use, production resource development, etc. are also included in the term nautical chart.

*Some of the terminology used in reference to "Omega Charts" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…さらにもう1組の局に基づく双曲線を得れば,2線の交点として船位が求められる。電波航法用図はこの双曲線(電波ラティス)を記入した図で,大洋航海用のロラン海図,オメガ海図,沿岸航海用のデッカ海図などがある。以上の航海用海図のほか広義には航海参考用,学術用,生産資源開発用等の特殊図も海図に含めることがある。…

※「オメガ海図」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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