英语词汇“terrain alert”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	terrain alert
释义	terrain alert terrain alert i. A facility that alerts the pilot when the aircraft reaches a preset altitude above the terrain during descent. This facility is in the form of an audio and/or visual warning. ii. A terrain or an obstruction alert is issued when, in the controller's judgment, an aircraft's altitude places it in an unsafe proximity to the terrain and/or obstructions.
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