7 Control Zones in Canada
Classes
A,B,C,D,E,F,G
Class A
Control High Level Airspace
Class B
Controlled Low Level Airspace
Class C
Control zone and terminal control area for busy airports
Class D
Control zone and terminal control area for moderate traffic airports
Class E
Control zone with airport without towers. ATC to monitor and manage flight safely
Class G
Uncontrolled airspace
Class F
Restricted airspace. No aircraft may enter without permission. From the user agency or controlling agency