救きゅう難なん信しん号ごう

noun

distress signal; SOS

Refers to any signal requesting help in an emergency, such as SOS, Mayday, flares, or radio calls.

• 船ふねが救きゅう難なん信しん号ごうを発はっ信しんした。

  The ship sent out a distress signal.

• 遭そう難なん者しゃは救きゅう難なん信しん号ごうを送おくり続つづけた。

  The survivors kept sending distress signals.