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see also: area control centre (ACC)

airship
A power-driven lighter-than-air aircraft.
Fr: dirigeable
air show
An aerial display or demonstration before an assembly of persons by one or more aircraft.
Fr: spectacle aérien
airside The movement area of an airport, including adjacent terrain and buildings or portions thereof, where access is controlled. Fr: c.té piste
air sovereignty test A flight that is designed to test the detection, identification and reporting functions of the air defence forces (aerospace defence control facility (ADCF) and interceptor or fighter units).
.  
abbreviation: SUADE

.  
see also: special aerospace defence exercise (SPADE)

Fr: essai de souveraineté aérienne
airspace classification The division of the Canadian Domestic Airspace (CDA) into seven classes, each identified by a single letter: A, B, C, D, E, F or G. The application of any classification to an airspace structure determines the operating rules, the level of ATC service provided within the structure and, in some instances, communications and equipment requirements. The horizontal and vertical limits of airspace are described in the Designated Airspace Handbook (DAH).
(a)  
Class A airspace Controlled high-level airspace within which only IFR flight is permitted and ATC separation is provided to all aircraft. The vertical dimensions of Class A high level controlled airspace are as follows:

(i)
Southern Control Area (SCA): 18 000 ft ASL to FL 600 inclusive;

(ii)
Northern Control Area (NCA): FL 230 to FL 600 inclusive; and

(iii) Arctic Control Area (ACA): FL 270 to FL 600 inclusive.

(b)  
Class B airspace Controlled low-level airspace within which both IFR and VFR flights are permitted and ATC separation is provided to all aircraft. Class B low level controlled airspace is all airspace above 12 500 ft ASL, or at and above the minimum en route altitude (MEA), whichever is higher, up to, but not including, 18 000 ft ASL. Terminal control areas (TCA) and associated primary control zones may also be classified as Class B airspace.

(c)  
Class C airspace Controlled airspace within which both IFR and VFR flights are permitted, but VFR flights require a clearance to enter. ATC separation is provided to all IFR aircraft and, as necessary to resolve possible conflicts, between IFR and VFR aircraft. TCAs and associated primary control zones may be classified as Class C airspace.

(d)  
Class D airspace Controlled airspace within which both IFR and VFR flights are permitted, but VFR flights must establish two-way communications with the appropriate ATC agency prior to entering the airspace. ATC separation is provided only to IFR aircraft. TCAs and associated primary control zones may be classified as Class D airspace.