ATPL: Control Area (CTA) is defined as follows:
Domanda 194, Air Law - ATPL - Airline Transport Pilot license
| A controlled airspace extending upwards from a height of 900 feet above the Earth. |
| A controlled airspace extending upwards from a height of 1.000 feet above the Earth. |
| A controlled airspace extending upwards from the surface of the Earth to a specified limit. |
| A controlled airspace extending upwards from a specified limit above the Earth. |
