hundred-percent rectangle

hundred-percent rectangle

[¦hən·drəd pər′sent ′rek‚taŋ·gəl]
(ordnance)
A rectangle whose length is eight probable errors in range, and whose breadth is eight probable errors in direction; its center is the center of dispersion; it is the area in which all shots (except wild shots) will fall when fired with the same data under identical conditions. Also known as rectangle of dispersion.