(aviation) The orientation of an aircraft with respect to the horizon.

(military) The shore-based officer (aviator) responsible to the landing force commander for control and coordination of air operations within the landing force commander's area of operations when control of these operations is passed ashore.

(military) The principal air operations installation (ship-based) from which all aircraft and air warning functions of tactical air operations are controlled. Also called Navy TACC.

plural of aircraft attitude

plural of tactical air control center

plural of tactical air commander

plural of Air Marshal

(military) The military air force of a particular armed forces. / (US, military, politics) Ellipsis of United States Air Force.

plural of hearing aid

(of a television or radio broadcast) Transmitted without encryption.