ENR 1.4  ATS Airspace Classification and Description

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.).

1   AIRSPACE BELOW FL 660

1.1   ICAO Airspace Classification (SERA.6001)

The requirements for the flights within each class of airspace are as shown in the following table.

ClassType of flightSeparation providedService providedSpeed limitation(*)Radio communication capability requirementContinuous two-way-air-ground voice communication requiredSubject 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.

(***) Air-ground voice communications are mandatory for flights participating in the advisory service. Pilots shall maintain continuous air-ground voice communication watch and establish two-way communication, as necessary, when flying in RMZ.

AIFR onlyall ACFTATC servicenot applicableyesyesyes
BIFRall ACFTATC servicenot applicableyesyesyes
VFRall ACFTATC servicenot applicableyesyesyes
CIFRIFR from IFRATC servicenot applicableyesyesyes
IFR from VFR
VFRVFR from IFR(1) ATC service for separation from IFR;250 KIAS below FL 100yesyesyes
(2) ATC service VFR/VFR traffic information (and traffic avoidance advice on request)
DIFRIFR from IFRATC service including traffic information about VFR flights (and traffic avoidance advice on request)250 KIAS below FL 100yesyesyes
VFRNILATC service IFR/VFR and VFR/VFR traffic information (and traffic avoidance advice on request)250 KIAS below FL 100yesyesyes
EIFRIFR from IFRATC service, as far as practical, traffic information about VFR flights250 KIAS below FL 100yesyesyes
VFRNILtraffic information as far as practical250 KIAS below FL 100no(**)no(**)no
FIFRIFR from IFR as far as practicalair traffic advisory service, FIS if requested250 KIAS below FL 100yes(***)no(***)no
VFRNILFIS if requested250 KIAS below FL 100no(**)no(**)no
GIFRNILFIS if requested250 KIAS below FL 100yes(**)no(**)no
VFRNILFIS if requested250 KIAS below FL 100no(**)no(**)no
Operational Air Traffic

Deviations from the ICAO airspace classification valid for OAT are highlighted in bold in the table below.

ClassTypeSeparationServiceSpeed limitationRadio communicationSubject to ATC CLR
CIFRIFR from IFR
IFR from VFR
ATC servicenot applicablecontinuous two-wayyes
VFRVFR from IFRATC service for separation from IFR
VFR traffic information (and traffic avoidance advice on request)
not applicablecontinuous two-wayyes
DIFRIFR from IFRATC service including traffic information about VFR flights (and traffic avoidance advice on request)not applicablecontinuous two-wayyes
VFRnot providedaerodrome control servicenot applicablecontinuous two-wayyes
GIFRnot providedFIS and RISnot applicablerequiredno
VFRnot providedFIS and RISnot applicablerequiredno

2   AIRSPACE ABOVE FL 660

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: