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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 Aircraft emergency frequency ： ウィキペディア英語版 Aircraft emergency frequency The aircraft emergency frequency (also known as guard) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress. The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD) or VHF Guard, and 243.0 MHz for military use, also known as Military Air Distress (MAD) or UHF Guard. Earlier emergency locator transmitters used the guard frequencies to transmit, but an additional frequency of 406 MHz is used by more modern ELTs. ==History== The choice of 121.5 MHz was made by the ICAO in conjunction with ARINC and the ITU. 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「Aircraft emergency frequency」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.