Designated Areas of Controlled Airspace

Question 1

Controlled airspace includes:

Answer 1

Controlled zones
Terminal control zones
Control area extensions
Transition areas

Question 2

Control zones

Answer 2

Designated areas around certain aerodromes

Keep IFR aircraft within controlled airspace during approaches

Question 3

Dimension of control zones

Answer 3

If there’s a civilian control tower within a terminal control area: radius of control zone is 7NM
If not, radius is typically 5NM
Special case (ex. military), radius is 10 NM

Capped at 3000ft above aerodrome elevation (AAE)
Military control zones capped at 6000ft AAE

Question 4

Terminal control areas (TCAs)

Answer 4

exists at high-volume airports to provide ATC service to arriving/ departing/ enroute aircraft

Question 5

Dimension of terminal control areas

Answer 5

Inner circle: 12NM radius based at 1200ft AGL
Intermediate circle: 35NM radius based at 2200ft AGL
Outer limit: 45NM radius from the aerodrome geographic coordinated based at 9500ft AGL

Question 6

Control area extensions (CAEs)

Answer 6

Established at some busy airports where controlled airspace is insufficient to permit required separation between IFR arrivals and departures

Question 7

Dimension of control area extensions

Answer 7

From 2200ft AGL up to, but not including 18000ft ASL

Question 8

Transition areas

Answer 8

Established when it is considered advantageous/ necessary to provide additional controlled airspace for containment of IFR operations

Question 9

Dimension of transition area

Answer 9

From 700ft AGL to the base of the overlying controlled airspace

Radius is usually 15NM from the aerodrome coordinates (must be large enough to contain all aerodrome-published instrument approach procedures)