Aviation glossary
CTR
Control Zone — the controlled airspace around a controlled aerodrome. Entry requires an ATC clearance and the appropriate VFR/IFR flight plan.
A CTR (Control Zone) is controlled airspace adjacent to a controlled aerodrome, usually extending from the ground up to several thousand feet. In the Czech Republic examples include Prague (LKPR), Brno (LKTB), Ostrava (LKMT) and Karlovy Vary (LKKV). An ATC clearance is required to transit or land — entering without a clearance has operational and legal consequences.
Related terms
- ATCAir Traffic Control — the service that issues clearances and instructions in controlled airspace and is responsible for aircraft separation.
- ATZAerodrome Traffic Zone — the airspace around an uncontrolled aerodrome. Entry requires two-way radio and knowledge of local procedures.
- AFISAerodrome Flight Information Service — an information service at uncontrolled aerodromes. Provides traffic, weather and runway information but never issues control clearances.