The airspace within the Brussels FIR/UIR is subdivided into four classifications (C, D, E and G) according to ICAO specifications.
Note 1: If an airspace is not activated at specific times, the classification of the surrounding airspace applies.
Note 2: Where ATS airspaces with a different class of airspace adjoin vertically, flights at a common level shall comply with the requirements of, and will receive the services applicable to, the less restrictive class of airspace (class B is considered less restrictive than class A; class C is considered less restrictive than class B; etc.).
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 | Speed limitation(*) | Radio communication capability requirement | Continuous two-way-air-ground voice communication required | Subject to ATC CLR |
---|---|---|---|---|---|---|---|
(*) the CAA may exempt aircraft types that cannot maintain this speed for technical or safety reasons. | |||||||
(**) Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, when flying in RMZ. | |||||||
A | IFR only | all ACFT | ATC service | not applicable | yes | yes | yes |
B | IFR | all ACFT | ATC service | not applicable | yes | yes | yes |
VFR | all ACFT | ATC service | not applicable | yes | yes | yes | |
C | IFR | IFR from IFR | ATC service | not applicable | yes | yes | yes |
IFR from VFR | |||||||
VFR | VFR from IFR | (1) ATC service for separation from IFR; | 250 KIAS below FL 100 | yes | yes | yes | |
(2) ATC service, VFR/VFR traffic information (and traffic avoidance advice on request) | |||||||
D | IFR | IFR from IFR | ATC service, traffic information about VFR flights (and traffic avoidance advice on request) | 250 KIAS below FL 100 | yes | yes | yes |
VFR | NIL | ATC service, IFR/VFR and VFR/VFR traffic information (and traffic avoidance advice on request) | 250 KIAS below FL 100 | yes | yes | yes | |
E | IFR | IFR from IFR | ATC service and, as far as practical, traffic information about VFR flights | 250 KIAS below FL 100 | yes | yes | yes |
VFR | NIL | traffic information as far as practical | 250 KIAS below FL 100 | no(**) | no(**) | no | |
F | IFR | IFR from IFR as far as practical | air traffic advisory service, FIS if requested | 250 KIAS below FL 100 | yes | yes | no |
VFR | NIL | FIS if requested | 250 KIAS below FL 100 | no(**) | no(**) | no | |
G | IFR | NIL | FIS if requested | 250 KIAS below FL 100 | yes | yes | no |
VFR | NIL | FIS if requested | 250 KIAS below FL 100 | no(**) | no(**) | no |
Deviations from the ICAO airspace classification valid for OAT are highlighted in bold in the table below.
Class | Type | Separation | Service | Speed limitation | Radio communication | Subject to ATC CLR |
---|---|---|---|---|---|---|
C | IFR | IFR from IFR IFR from VFR | ATC service | not applicable | continuous two-way | yes |
VFR | VFR from IFR | ATC service for separation from IFR VFR traffic information (and traffic avoidance advice on request) | not applicable | continuous two-way | yes | |
D | IFR | IFR from IFR | ATC service including traffic information about VFR flights (and traffic avoidance advice on request) | not applicable | continuous two-way | yes |
VFR | not provided | aerodrome control service | not applicable | continuous two-way | yes | |
G | IFR | not provided | FIS and RIS | not applicable | required | no |
VFR | not provided | FIS and RIS | not applicable | required | no |
The airspace above FL 660 is an unclassified, uncontrolled airspace within which only IFR flights are permitted. Aircraft operating within this airspace are submitted to following conditions: