The angle between the horizontal plane and the axis of the bore when the weapon is laid. (DOD only) It is the algebraic sum of the elevation, angle of site, and complementary angle of site.
quadrant elevation
quadrant elevation
[′kwä·drənt ‚el·ə′vā·shən] (ordnance) Vertical angle between the base and the axis of the bore of a gun which exists just prior to firing.SeeQASeeQE