英语词汇“polar air navigation”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	polar air navigation
释义	polar air navigation polar air navigation Air navigation in the region of the north or south pole. Polar air navigation poses special problems because of the convergence of meridians, erratic behavior of magnetic compasses, unreliability of radio performance and scarcity of radio stations, and inaccurate or inadequate charts. These problems have been partially overcome by the exploitation of electronic and satellite navigation.
随便看	international telecommunications satellite organization international telecommunications service international telecommunications society international telecommunications union international telecommunications union - telecommunications standards sector international telecommunications users group international telecommunication symposium international telecommunication union international telecommunication union itu international telecommunication union-telecommunication international telecommunication union - telecommunications standardization board international telecommunication union -telecommunication standardization sector international telecomunications union international telecomunication union international teleconferencing association international telegram international telegraph alphabet international telegraphic consultative committee code 2 international telegraph & telephonic advisory committee international telegraph union international telenurses association international telephone advisory committee international telephone and telegraph consultative committee international telephone and telegraph federal support system international telephone network

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