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Airspace classes used in Australia

Picture showing Australian airspace map

Four of the International Civil Aviation Organisation (ICAO) controlled airspace classes are used in Australia: A, C, D and E.

Uncontrolled Airspace (no separation service is provided by ATC ) is Class G.

Uses of each type of airspace:

Class A	High level enroute airspace. Well suited for modern passenger jets.
Class C	Surrounds major city airports starting at ground level.
Class D	This airspace is often used at smaller regional airports. The upper boundary of Class D is usually 4500 feet (1368 m).
Class E	Australian Class E is mid-level enroute ‘controlled’ airspace. Its base is at 8500 feet (2584 m) within enroute secondary surveillance radar coverage.
Class G	Uncontrolled airspace. Flight Information Service and Traffic Information Service only..