Abort
abandon of action, in this case: to cancel the already started takeoff
ACC
Area Control Center
ADF
Automatic direction finder. A device which shows the direction of the transmitting station on a kompass.
Aileron
a movable control surface on the trailing edge of the wing, near the tip, used to roll the plane
Air brake
a surface on the wing, which when deployed, creates drag to decrease the speed of the aircraft. Also called spoiler.
Altimeter
an instrument, indicating the altitude of the aircraft. Normally measured in Feet, in some countries in Meters.
It shows the altitude above the preselected air pressure. This can be the air pressure of the ground, or when flying on Flight levels the altitude above an air pressure of 1013 mb is showed.ATC
Air Traffic Control
ATIS
Automatic Terminal Information Service. Airport and weather information which are recorded on a tape and transmitted on the approach fix frequency. Updated every 20 minutes.