attack targets with a useful payload and then return to its base. comms Communications. concussive With violent, if not explosive, force. contrails Trails of condensed water vapor created in the air by an aircraft flying at high altitude. corner velocity (corner speed) The minimum speed at which an aircraft can pull its maximum rated g's. critical Mach number The Mach number of the total airframe, as opposed to local Mach numbers which could vary across an aircraft from wing to fuselage. cross-deck pendant On an aircraft carrier, the portion of the arresting cable which stretches across the deck and engages the hook. crosswind The wind vector component which is perpendicular to an aircraft's course. crosswind crab Correction of aircraft heading to compensate for crosswind drift. CRT azimuth The angular measure of direction in the horizontal plane displayed with a cathode ray tube (CRT) instrument system. CAW Carrier Air Wing. See air wing.