What are the classes of controlled airspace in Canada?

Controlled Airspace. Controlled airspace will be classified as Class A, B, C, D or E airspace. It is the airspace within which all aircraft may be subject to air traffic control and there may be licensing and equipment requirements to fly in it. All uncontrolled airspace is Class G airspace.



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There are two categories of airspace or airspace areas: Regulatory (Class A, B, C, D, and E airspace areas, restricted and prohibited areas). Nonregulatory (military operations areas [MOA], warning areas, alert areas, controlled firing areas [CFA], and national security areas [NSA]).

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B4UFLY Mobile App Download the FAA's safety app, which provides real-time information about airspace restrictions and other flying requirements based on your GPS location.

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Class D airspace is usually a control zone for smaller airports or aerodromes that has a 5-nautical-mile (9.3 km) radius and a height of 3,000 ft (910 m) AAE. Airports in extremely busy airspace may have only a 3-nautical-mile (5.6 km) radius control zone.

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The Class C airspace around Toronto/Lester B. Pearson International Airport (LBPIA) naturally concentrates circumnavigating traffic around its periphery.

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Class C: This is the controlled airspace above 7,500 feet and surrounding major airports. Both IFR and VFR flights are permitted and both require ATC clearance and separation service is to be provided by ATC. Class G: This airspace is uncontrolled.

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Class D. IFR and VFR flights are permitted and all flights are provided with air traffic control service, IFR flights are separated from other IFR flights and receive traffic information in respect of VFR flights, VFR flights receive traffic information in respect of all other flights.

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In short, the real purpose of Class F is to allow flights to remain IFR in uncontrolled environments. Since this is a sort of mix between Class E and Class G airspace, there is no Class F inside the United States.

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In the 1900s, Hungarian physicist Theodore von Kármán determined the boundary to be around 50 miles up, or roughly 80 kilometers above sea level. Today, though, the Kármán line is set at what NOAA calls “an imaginary boundary” that's 62 miles up, or roughly a hundred kilometers above sea level.

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