ATPL: The operating frequency range of a low altitude radio altimeter is:
Domanda 239, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| 5400 MHz or 9400 MHz. |
| 2700 MHz to 2900 MHz. |
| 4200 MHz to 4400 MHz. |
| 5 GHz. |
| 5400 MHz or 9400 MHz. |
| 2700 MHz to 2900 MHz. |
| 4200 MHz to 4400 MHz. |
| 5 GHz. |
