GIANT KILLER

GIANT KILLER is a military Air Traffic Control (ATC) call sign used within certain regions of the contiguous United States (CONUS). The call sign is given to air traffic controllers responsible for flight operations within restricted military airspace reserved for combat training exercises. The call sign is commonly published in NOTAMs that designate restricted airspace reserved for military flight operations or combat exercises where normal airspace separation rules do not apply. Previous to the use of the call sign, no standardized identification method existed for civilian or military aircraft to communicate to the managing controller.