電でん波ぱ探たん知ち機き

noun

radar

A device that detects objects by emitting radio waves and analyzing their reflections. This is a technical term, but it is understood in general contexts.

• 船ふねは電でん波ぱ探たん知ち機きで他ほかの船ふねの位い置ちを確かく認にんした。

  The ship used radar to confirm the positions of other vessels.

• 電でん波ぱ探たん知ち機きの開かい発はつは第だい二に次じ世せ界かい大たい戦せん中ちゅうに急きゅう速そくに進すすんだ。

  The development of radar advanced rapidly during World War II.