Classes of airspace

AIP ENR 1.4.

Australian airspace is structured similar to International Civil Aviation Organization (ICAO) standards. The aeronautical information publication (AIP) defines the different classes of airspace in Australia. The table below summarises AIP ENR 1.4:

ClassType of flightSeparation providedService providedSpeed limitationRadio communication requirementsSUBJ ATC CLR
AIFRAll aircraftATC serviceN/AContinuous two-wayYES
VFR not permitted (see AIP ENR 1.7)
CIFRIFR from IFR, IFR from VFR IFR from Special VFRATC service250 kt below 10,000 ft AMSL, except where specified in ERSA, DAP or varied by ATC (see note 2)Continuous two-wayYES
VFRVFR from IFRATC service for separation from IFR
VFR/VFR traffic INFO (and traffic avoidance advice on request)
250 kt IAS  below 10,000 ft AMSLContinuous two-wayYES
Special VFRSpecial VFR from special VFR, when VIS does not meet VMCATC serviceContinuous two-wayYES
DIFRIFR from IFR IFR from special VFRATC service, traffic information about VFR flights200 kt IAS at or below 2500 ft AAL within 4 nm of the primary Class D aerodrome  (see note 3)
250 kt IAS  in the remaining Class D airspace
Continuous two-wayYES
VFRNilATC service, traffic INFO on all other flightsContinuous two-wayYES
Special VFRSpecial VFR from special VFR when visibility is less than VMCATC serviceContinuous two-wayYES
EIFRIFR from IFRATC service and traffic info on VFR flights as far as is practicable250 kt IAS  below 10,000 ft AMSLContinuous two-wayYES
VFRNilFIS
SIS—flight following O/R (ATC workload permit)
250 kt IAS  below 10,000 ft AMSLContinuous two-wayNO
G
N*
NilFIS250 kt IAS  below 10,000 ft AMSL250 kt IAS  below 10,000 ft AMSLContinuous two-wayNO
NilFIS
SIS—flight
following O/R
(ATC workload
permitting)
250 kt IAS  below 10,000 ft AMSL250 kt IAS  below 10,000 ft AMSLVHF radio
required for
ops above 5000
ft AMSL and
at aerodromes
where carriage
and use of radio
is required
NO
250 kt IAS  below 10,000 ft AMSL250 kt IAS  below 10,000 ft AMSLVHF radio
required for ops
in reduced VMC
NO
G
S†
IFRNilFIS O/R250 kt IAS  below 10 000 ft AMSLContinuous two-wayNO
VFRNilFIS O/R250 kt IAS below 10,000 ft AMSLNilNO

Notes

  • if a radio is fitted to an aircraft it must be serviceable even though the carriage of a radio may
    not be mandatory
  • N* = on and north of 65° south
  • S† = south of 65° south
  • ATC can vary the speed at their discretion.