ATPL: An aircraft, at FL 410 is passing overhead a DME station at mean sea level. The DME indicates approximately:
Domanda 121, Radio Navigation - ATPL - Airline Transport Pilot license
| 6.8 NM |
| 6.1 km |
| 6.1 NM |
| It is of no use to civil aviation |
| 6.8 NM |
| 6.1 km |
| 6.1 NM |
| It is of no use to civil aviation |
