The frequency of an SSR ground transmission is:
Domanda 84, Radio Navigation - ATPL - Airline Transport Pilot license
| 1050 +/- 0.5 MHz |
| 1030 +/- 0.2 MHz |
| 1120 +/- 0.6 MHz |
| 1090 +/- 0.3 MHz |
| 1050 +/- 0.5 MHz |
| 1030 +/- 0.2 MHz |
| 1120 +/- 0.6 MHz |
| 1090 +/- 0.3 MHz |
