1. 조난신호에 관한 ICAO 규정으로 옳지 않은 것은?

  • 1
    A distress message sent via data link which transmits the intent of the word "MAYDAY"

  • 2
    A radiotelephony distress signal consisting of the spoken word "MAYDAY"

  • 3
    A parachute flare showing a green light

  • 4
    A signal made by radiotelegraphy or by any other signaling method consisting of the group "SOS"
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