Definition
A continuous broadcast of recorded non-control information at busier airports, providing arriving and departing pilots with current airport and weather data such as the active runway, wind, visibility, ceiling, altimeter setting, and any pertinent remarks. Each broadcast is identified by a phonetic letter (Alpha, Bravo, Charlie, etc.) that changes whenever the information is updated, allowing pilots to confirm they have the latest version when contacting ATC.
Plain English
A looping recorded message you tune into before talking to the tower or approach, telling you the latest weather and which runway is in use, so the controller doesn't have to read it all to every pilot.
Context Anchor
Pilots encounter ATIS before arriving at or departing from a controlled airport, usually by listening on a published radio frequency or receiving the information through approved cockpit equipment.
Derivation
Automatic' because it plays on its own without a controller speaking live each time. 'Terminal' refers to the terminal area around an airport, not the building. 'Information Service' signals that it carries information only — no clearances or instructions.
Why Pilots Care
Listening to ATIS lets pilots obtain current airport details without occupying air traffic control frequencies, supporting safer and more efficient operations.
Analogy
Like a recorded announcement at a busy train station that updates arriving passengers on platform changes and track conditions.
Intuition Check
Do not read “terminal” as the passenger terminal building. Here it means the airport operating area. ATIS gives information; it does not give you permission to take off, land, or enter controlled airspace.
Example Sentence 1
Ten miles out, the pilot tuned in ATIS and noted the active runway, wind, and altimeter before calling approach.
Example Sentence 2
Before entering the traffic pattern she checked the latest ATIS to confirm wind direction and any runway closures.