Aircraft flying under VFR are not required to be in contact with air traffic controllers and are responsible for their own separation from other aircraft. Widebody Aircraft Generally considered to be any airliner with more than one aisle in the passenger cabin. Technically, any aircraft with a fuselage diameter in excess of 200 inches may be considered a widebody. Windshear Weather phenomenon entailing a strong downdraft of air that can result in the loss of lift for an aircraft passing through it. Yaw A description of the movement of the nose of an aircraft from side to side, or left and right.
Yaw motion is controlled by the vertical stabilizer and the rudder.
Yield Average revenue per revenue passenger mile or revenue ton mile, expressed in cents per mile. Yield Management Also known as revenue management, the process airlines use to set prices for a flight. The goal is to find the mix of seat prices that produces the most revenue.