ATPL: The pressure altitude is the altitude corresponding:
Domanda 9, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| In ambient atmosphere, to the reference pressure Ps. |
| In standard atmosphere, to the reference pressure Ps. |
| In standard atmosphere, to the pressure Ps prevailing at this point. |
| In ambient atmosphere, to the pressure Ps prevailing at this point. |
