noun
: a method of target designation and marking by reference to a known description point conceived as the center of a clockface, the targets being pointed out as on the hour radii of the imaginary dial
noun
: a method of target designation and marking by reference to a known description point conceived as the center of a clockface, the targets being pointed out as on the hour radii of the imaginary dial
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012