distress signal
(historical, WW2) A garishly painted aircraft, flying as an initial reference point for a bomber formation in the early part of a mission.
plural of Babb
eighteen
An emergency signal sent by radio (or other means) from a ship or aircraft in distress or danger. / An indication of distress.
沿岸警備隊は夜明けに故障した貨物船からのかすかな遭難信号を受信した。
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