Gunner's quadrant

Also found in: Encyclopedia.
an instrument consisting of a graduated limb, with a plumb line or spirit level, and an arm by which it is applied to a cannon or mortar in adjusting it to the elevation required for attaining the desired range.

See also: Quadrant

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
"Ground War" evaluates how innovations ranging from the stirrup to the gunner's quadrant have transformed battles on land; "Warplane" chronicles airborne military advances in the century since the Wright brothers opened up the skies; and "Warship" reveals naval military history up to modern-day nuclear aircraft carriers, submarines, and more.
With classic examples like the stirrup and lesser known innovations like the gunner's quadrant, the series reveals how even the smallest innovations can have a wide-ranging effect on the way wars are fought.
A new gunner's quadrant lighting kits is available that makes the M1A1 quadrant readable at night.