方ほう向こう探たん知ち機き

noun

direction finder

A device that determines the direction of a radio signal or sound source; used in navigation, aviation, and maritime contexts.

• 方ほう向こう探たん知ち機きを使つかって遭そう難なん信しん号ごうの発はっ信しん源げんを特とく定ていした。

  They located the source of the distress signal using a direction finder.