The shape of a wing or blade (of a propeller, rotor, or turbine) as seen in cross-section.
An international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services, including those in aviation.
The speed of an aircraft relative to the air through which it is moving.
A service provided by ground-based controllers who direct aircraft on the ground and through controlled airspace.
An instrument that measures the height of an aircraft above a given level, usually mean sea level.
A continuous broadcast of recorded aeronautical information in busier terminal areas.
The angle between the chord line of an airfoil and the direction of the air flowing past the airfoil.
The actual distance between an aircraft and the ground directly below it.
A downward angle from horizontal of an aircraft’s wing or tailplane.
The runway length required for an aircraft to accelerate to takeoff speed and then brake to a full stop.
