Definition
Aerodrome Flight Information Service. A service provided at certain non-towered or part-time-towered aerodromes (primarily outside the United States, especially in ICAO countries) by a ground-based specialist who supplies pilots with traffic, weather, runway, and field condition information by radio. AFIS personnel do not issue clearances or control instructions; pilots remain responsible for separation and for their own takeoff, landing, and taxi decisions.
Plain English
A radio service at some smaller airports where a person on the ground gives you useful information — like other traffic, the wind, which runway is in use, and the condition of the field — but does not tell you what to do. You still make all the decisions about when to take off, land, or taxi.
Context Anchor
You may see AFIS listed with airport frequency information, or hear it as a recorded broadcast before contacting flight service or another radio frequency at an airport that provides the service.
Derivation
From 'aerodrome' (the international term for airport) plus 'flight information service' (an ICAO category of service that provides information rather than control). The name itself signals the key distinction: information, not instructions.
Why Pilots Care
Gives pilots critical situational awareness at airports lacking full ATC, helping avoid traffic conflicts and weather surprises during arrival and departure.
Intuition Check
AFIS sounds like it might be a control service, but it is not. AFIS gives information; it does not clear an aircraft to take off, land, taxi, or enter controlled airspace.
Example Sentence 1
Inverness Radio, Cessna G-ABCD, ten miles south, inbound for landing, request airport advisory.
Example Sentence 2
AFIS advised of two aircraft in the pattern and confirmed the preferred runway was clear of debris.