Microlight » Air Law » Controlled Airspace
Control Zones (CTR)
A control zone is that portion of airspace around an aerodrome:
- when an aerodrome control service or an aerodrome and approach control service is required; and
- the traffic density and pattern requires controlled airspace.
A control zone must be as small as practical consistent with the need to protect the flight paths of IFR flights arriving at and departing from the aerodrome.
When active require ATC clearance to enter.
Control zones are either Class C or D airspace. When not active become Class G airspace.