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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク TVMDC ： ウィキペディア英語版 TVMDC TVMDC is a method for converting true, magnetic and compass headings. TVMDC is expressed as: True, variation, magnetic, deviation, compass. The most common use of the TVMDC method is correcting courses during nautical navigation. ==Background== The Geographic North Pole and the Magnetic North Pole are not exactly the same position on the earth. From any position on the globe, a direction can be determined to either the geographic north pole or to the magnetic north pole. These directions are expressed in degrees from 0-360, and also fractions of a degree. The difference between these two directions is known as variation. While a compass is installed in a vehicle or vessel, local anomalies of the vessel can introduce error into the direction that the compass points. The difference between the direction to Magnetic North Pole and the direction that the compass is pointing is known as Deviation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「TVMDC」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.