ENR 1.4 ATS airspace classification
1 Classification of airspaces
Class A. IFR flights only are permitted, all flights are subject to air traffic control service and are separated from each other.
Class B. IFR and VFR flights are permitted, all flights are subject to air traffic control service and are separated from each other.
Class C. IFR and VFR flights are permitted, all flights are subject to air traffic control service and IFR flights are separated from other IFR flights and from VFR flights. VFR flights are separated from IFR flights and receive traffic information in respect of other VFR flights.
Class D. IFR and VFR flights are permitted and all flights are subject to air traffic control service, IFR flights are separated from other IFR flights and receive traffic information in respect of VFR flights, VFR flights receive traffic information in respect of all other flights.
Class E. IFR and VFR flights are permitted, IFR flights are subject to air traffic control service and are separated from other IFR flights. All flights receive traffic information as far as is practical.
Class F. IFR and VFR flights are permitted, all participating IFR flights receive an air traffic advisory service and all flights receive flight information service if requested.
Class G. IFR and VFR flights are permitted and receive flight information service if requested.
The requirements for the flights within each class of airspace are as shown in the following table.
| Class | Type of flight | Separation provided | Service provided | VMC visibility and distance from cloud minima | Speed limitation | Radio communication requirement | Subject to an ATC clearance |
|---|---|---|---|---|---|---|---|
| A | IFR only | All aircraft | Air traffic control service | Not applicable | Not applicable | Continuous two-way | Yes |
| B | IFR | All aircraft | Air traffic control service | Not applicable | Not applicable | Continuous two-way | Yes |
| VFR | All aircraft | Air traffic control service | 8 KM at and above FL 100 AMSL 5 KM below FL 100 AMSL Clear of clouds | Not applicable | Continuous two-way | Yes | |
| C | IFR | IFR from IFR IFR from VFR | Air traffic control service | Not applicable | Not applicable | Continuous two-way | Yes |
| VFR | VFR from IFR |
| 8 KM at and above FL 100 AMSL 5 KM below FL 100 AMSL 1 500 M horizontal; 300 M vertical distance from cloud | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | Yes | |
| D | IFR | IFR from IFR | Air traffic control service including traffic information about VFR flights (and traffic avoidance advice on request) | Not applicable | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | Yes |
| VFR | Nil | Traffic information between VFR and IFR flights (and traffic avoidance advice on request) | 8 KM at and above FL 100 AMSL 5 KM below FL 100 AMSL 1 500 M horizontal; 300 M vertical distance from cloud | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | Yes | |
| E | IFR | IFR from IFR | Air traffic control service and traffic information about VFR flights as far as practical | Not applicable | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | Yes |
| VFR | Nil | flight information service. Traffic information as far as practical | 8 KM at and above FL 100 AMSL 5 KM below FL 100 AMSL 1 500 M horizontal; 300 M vertical distance from cloud | 250 KT IAS below 3 050 M (10 000 FT) AMSL | No | No | |
| F | IFR | IFR from IFR as far as practical | Air traffic advisory service; flight information service | Not applicable | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | No |
| VFR | Nil | Flight information service | 8 KM at and above FL 100 AMSL 5 KM below 10000ft MSLAMSL 1 500 M horizontal; 300 M vertical distance from cloud At and below 3000ft MLS AMSL or 1000ft above terrain whichever is higher – 5 KM, clear of cloud and in sight of ground or water 3 KM, clear of cloud and in sight of ground or water | 250 KT IAS below 3 050 M (10 000 FT) AMSL 250 KT IAS 140 KT IAS | No | No | |
| G | IFR | Nil | Flight information service | Not applicable | 250 KT IAS below 3 050 M (10 000 FT) AMSL | Continuous two-way | No |
| VFR | Nil | Flight information service | 8 KM at and above FL 100 AMSL 5 KM below FL 100 AMSL 1 500 M horizontal; 300 M vertical distance from cloud At and below 900 M AMSL or 300 M above terrain whichever is higher – 5 KM, clear of cloud and in sight of ground or water | 250 KT IAS below 3 050 M (10 000 FT) AMSL 250 KT IAS 140 KT IAS | Normally no radio communication requirement. However parts of the airspace, designated Traffic Information Areas (TIZ or TIA), has a requirement for continuous two-way radio communication. No requirement for clearance. | No | |
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