Aviation glossary
ATZ
Aerodrome Traffic Zone — the airspace around an uncontrolled aerodrome. Entry requires two-way radio and knowledge of local procedures.
An ATZ (Aerodrome Traffic Zone) is airspace around an uncontrolled aerodrome, typically 3 NM in radius and up to 4000 ft AGL. Two-way radio contact and knowledge of local procedures (arrival routes, circuit altitude, active runway, AFIS or Radio traffic advisory service) are mandatory. Pilots report on the appropriate frequency at least three minutes before entering.
Related terms
- AFISAerodrome Flight Information Service — an information service at uncontrolled aerodromes. Provides traffic, weather and runway information but never issues control clearances.
- CTRControl Zone — the controlled airspace around a controlled aerodrome. Entry requires an ATC clearance and the appropriate VFR/IFR flight plan.