ATPL: A ground proximity warning system (GPWS), when mandatory installed on board an aircraft, must in all cases generate:
Domanda 159, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| At least one sound alarm to which a visual alarm can be added |
| A visual alarm to which a sound alarm can be added |
| A sound and visual alarm |
| A sound alarm or a visual alarm |
