If an aircraft is flying (with flaps and landing gear retracted) in proximity to terrain and its GPWS (Ground Proximity Warning System) get activated, because it is detecting that the aeroplane has an excessive rate of descent, the system provides the following aural warning signals:
Domanda 161, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| 'SINK RATE, SINK RATE' followed by 'WHOOP WHOOP PULL UP' (twice) |
| 'TOO LOW, TERRAIN' (twice) followed by 'TOO LOW GEAR' (twice) |
| 'TERRAIN, TERRAIN' followed by 'WHOOP WHOOP PULL UP' (twice) |
| 'DON'T SINK, DON'T SINK' |
