ATIS vs AFIS explained: compare one-way broadcasts, two-way aerodrome information, pilot responsibilities, radio use and simulator limits.
ATIS is a one-way, repeating broadcast of an aerodrome’s weather, runway, approach and operational information. AFIS usually means Aerodrome Flight Information Service: a person provides two-way traffic information and an alerting service at a non-controlled aerodrome, but does not issue air traffic control clearances. The terms are not interchangeable.
In Aviation & Real-World Flying terms, the practical rule is simple: listen to ATIS, but call AFIS. An aerodrome can have either service or both, so the presence of ATIS does not reveal whether traffic is controlled.
ATIS vs AFIS at a glance
| Feature | ATIS | AFIS |
|---|---|---|
| Full name | Automatic Terminal Information Service | Usually Aerodrome Flight Information Service |
| Communication | One-way recorded or synthesised broadcast, sometimes also available by data link | Two-way radio contact with an AFIS officer or operator |
| Main purpose | Reduces frequency congestion by broadcasting routine terminal information repeatedly | Provides flight, traffic and aerodrome information at a designated non-controlled aerodrome |
| Typical content | Wind, visibility, cloud, QNH or altimeter setting, runway, approach and significant notices | Known traffic, runway and aerodrome status, weather, local information and alerting assistance |
| Control authority | None; it is an information broadcast | Not an ATC service; exact ground authority varies by country |
| Pilot action | Listen, copy the information code and report that code when requested | Call with position, altitude where relevant, intentions and other locally required details |
ATIS messages are normally identified by a letter such as Alpha or Bravo. A new code indicates an updated message; our guide to copying and acknowledging ATIS broadcasts explains the message sequence in more detail.
Which frequency should a pilot use first?
If an aerodrome publishes both services, obtain ATIS first and then contact AFIS on its separate frequency.
- Check the chart or aerodrome information. Confirm the published frequencies, service hours and local procedures. Outside AFIS hours, the aerodrome may become unattended, use another type of service or close altogether.
- Listen to ATIS. Copy the current identifier, wind, runway, QNH or altimeter setting and any operational restrictions. Do not attempt to transmit on an ATIS frequency.
- Call AFIS. Give your callsign, position and intentions using the phraseology required by that country. Mention the ATIS identifier if local procedures request it.
- Maintain pilot responsibility. Use the traffic information to sequence and separate yourself as required. AFIS information does not transfer command responsibility from the pilot in command.
Can AFIS clear an aircraft to take off or land?
An AFIS officer does not independently issue an ATC take-off or landing clearance. The service reports known traffic and runway conditions so the pilot can act under the applicable national and aerodrome procedures.
The exact authority is jurisdiction-dependent. In some countries, a flight information service officer may issue instructions to aircraft and vehicles on the ground, or relay a clearance issued by another ATC unit. That does not turn AFIS into tower control; our explanation of ATC responsibilities covers the distinction between information and control.
An AFIS aerodrome can also lie beneath or within controlled airspace. Any required airspace clearance still comes from the responsible ATC unit, even if AFIS relays the message.
Can an aerodrome have both ATIS and AFIS?
Yes. ATIS can handle repetitive weather and runway information while the AFIS frequency handles live traffic reports and pilot calls.
The Lausanne scenery package for FSX provides a practical simulator example whose airport information lists separate ATIS and AFIS frequencies. In a simulator, however, a listed AFIS frequency does not guarantee a functioning human-style information service. Scenery can update airport data without adding the radio logic needed to answer calls.
What mistakes are commonly made with ATIS and AFIS?
- Calling ATIS as though it were a controller: ATIS is receive-only from the pilot’s perspective, so nobody will answer.
- Treating AFIS as a control tower: the word “Information” in the callsign is a strong clue that the station is providing information rather than ATC clearances.
- Using an old ATIS code: weather or runway changes may replace the message while the aircraft is taxiing or approaching. Confirm the latest identifier when practical.
- Assuming ATIS is only automated weather: it also carries runway, approach and operational details. Our comparison of ATIS with AWOS and ASOS explains the weather-service distinction.
- Ignoring operating hours: AFIS is often available only during published periods. Never assume that a frequency shown in a simulator or navigation database is continuously staffed.
Does AFIS always mean Aerodrome Flight Information Service?
No. In the ICAO-style aerodrome context, AFIS generally means Aerodrome Flight Information Service. Some regions, avionics systems and commercial products use AFIS for Automatic or Automated Flight Information Service instead.
Check the chart legend, national publication or product documentation rather than relying on the acronym alone. If the service involves a live two-way aerodrome information frequency, it is the Aerodrome Flight Information Service described here; if it is an automated broadcast or data product, its purpose and operating method may be different.