Below the tropopause, when descending at constant CAS:
Domanda 14, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| Mach number decreases and the velocity of sound increases. |
| Mach number and the velocity of sound decrease. |
| Mach number and the velocity of sound increase. |
| Mach number increases and the velocity of sound decreases. |
