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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 Warning Service ： ウィキペディア英語版 Aircraft Warning Service The Aircraft Warning Service (AWS) was a civilian service of the United States Army Ground Observer Corps instated during World War II to keep watch for enemy planes entering American airspace. It became inactive on May 29, 1944. ==Purpose== During World War I the airplane was not generally used as a long-range fighting machine. However, during the period from 1919 to the start of World War II, the heavy bomber was created, capable of ranging far from its home base and carrying a lethal load of high explosives. It soon became clear that a warning system was needed to protect against this new threat. Technology at the outset of World War II consisted of mechanical sound detectors that were found to be inadequate to the job. It was also argued that while soldier lookouts would be valuable, their use would detract from other needed military operations.〔Aircraft Warning Service Volunteer, June 1944〕 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 Warning Service」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.