noun
or visual-aural range
: a radio aid to air navigation by which a pilot determines if he is on course by either an appropriate aural signal, a meter reading, or both
noun
or visual-aural range
: a radio aid to air navigation by which a pilot determines if he is on course by either an appropriate aural signal, a meter reading, or both
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012