ATIS
Automatic Terminal Information Service
Last updated: April 20, 2026 · Maintained by Aviatr Editorial Team
What is ATIS?
ATIS (Automatic Terminal Information Service) is a continuous VHF broadcast at busy airports carrying current non-control information — active runway, weather, QNH, NOTAMs, and approach in use — so pilots receive it before calling ATC, reducing repetitive routine transmissions on busy frequencies. Each update is assigned a sequential letter code that pilots quote on first contact.
How is ATIS used?
Pilots tune the published ATIS frequency before entering the terminal area and listen for the airport name, time, ATIS letter, active runway, wind, visibility, cloud, QNH, temperature, dew point, and any special items. On first contact with tower or approach, the pilot reports 'with information Charlie' (or the current letter) to confirm receipt of the latest broadcast. Most major European airports issue a new ATIS every 30-60 minutes; weather-driven updates can occur more frequently. Pilots who miss ATIS receive the information verbally from the controller, consuming valuable frequency time for other traffic. Smaller airports may use AWOS or ASOS automated weather stations that broadcast without the letter-code system. D-ATIS (digital ATIS) is increasingly available via data-link, allowing pilots to review the information before departure without monitoring a separate radio frequency.