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遇将坠机情况求救的术语为什么叫 mayday? - 知乎
以此作为国际通用海难求救信号,是因为它在电报中是最容易发出,也最容易被接受辨识。 至于为什么不用 help 则与发音有关。 「 help 」的尾音较轻,冲击力不强,而「 Mayday 」的因为有重音,更能引起搜救人员的察觉。
sos(国际摩尔斯电码救难信号)_百度百科
SOS是国际通用的求救信号。在莫尔斯电码中,SOS用三个短信号(点),三个长信号(线)和再三个短信号(点)表示。SOS是世界公认的遇难海洋船只的求救信号。SOS是国际摩尔斯电码救难信号,并非任何单词的缩写。这3个字母组合其实没有任何实际意义,只是因为它的电码是由3个圆点、3条横线,再
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