発はっ光こう信しん号ごう

noun

flash signal; light signal

A signal sent by flashing light, often used between ships or as a warning. Can refer to caution signals or accident warning lights.

• 船ふねは発はっ光こう信しん号ごうを使つかって他ほかの船ふねと通つう信しんした。

  The ship communicated with other ships using flash signals.

• 踏ふみ切きりでは発はっ光こう信しん号ごうが点てん滅めつして列れっ車しゃの接せっ近きんを知しらせる。

  At the railroad crossing, a flashing caution signal warns of an approaching train.