半はん数すう必ひっ中ちゅう界かい

noun

circular error probable; CEP

Technical term used in ballistics and missile accuracy measurement. Refers to the radius of a circle within which half of the projectiles are expected to land.

• このミサイルの半はん数すう必ひっ中ちゅう界かいは約やく50メートルと推すい定ていされている。

  The CEP of this missile is estimated to be about 50 meters.