Classification of Airspace

Classification of airspace refers to the system by which airspace is categorized based on the type of operations conducted, the level of ATC service provided, and the requirements placed on pilots and aircraft. In Canada (and under ICAO standards), airspace is classified as Class A, B, C, D, E, F, or G.

Canadian Airspace Classes

  • Class A: FL180 and above; IFR only; ATC clearance required; all aircraft under positive control
  • Class B: 12,500 ft to FL180; IFR and VFR; ATC clearance required for all aircraft
  • Class C: Specified terminal areas; IFR and VFR; ATC clearance and two-way radio required; traffic information provided to VFR
  • Class D: Control zones around controlled airports; IFR and VFR; ATC clearance and two-way radio required
  • Class E: Controlled airspace below 12,500 ft not designated Class A–D; IFR requires ATC clearance; VFR needs no clearance
  • Class F: Special use airspace — advisory, restricted, or danger areas
  • Class G: Uncontrolled airspace; no ATC service; pilot assumes full responsibility

On the TC Written Exam

Airspace classification is heavily tested — for both PPL and CPL. Know which classes require ATC clearance, which require two-way radio, which permit VFR, and what equipment requirements apply. This is a guaranteed exam topic.

Related Terms

See also: Controlled Airspace, Uncontrolled Airspace, Control Zone.