High-level control areas (SCA, NCA, ACA)
A control area is named high-level controlled airspace (CARs 101.01): the Southern, Northern and Arctic Control Areas (SCA, NCA, ACA). They encompass high-level airways and the upper portions of some terminal control areas (TC AIM RAC 2.5).
Floors (18,000 ft ASL and up):
| Area | Floor |
|---|---|
| Southern Control Area (SCA) | 18,000 ft ASL |
| Northern Control Area (NCA) | FL 230 |
| Arctic Control Area (ACA) | FL 270 |
(TC AIM RAC 2.6)
Trap: treating the three floors as one level. Floors step up going north: 18,000 ft ASL, FL 230, FL 270.
References
- CARs 101.01
- TC AIM RAC 2.5
- TC AIM RAC 2.6