ATPL: A radio altimeter employing a continuous wave signal would have:
Domanda 241, Radio Navigation - ATPL - Airline Transport Pilot license
| A directional aerial for transmission and an omni-directional aerial for reception |
| An omni-directional aerial for transmission and directional aerial for reception |
| A directional aerial for both transmission and reception |
| Main control station, the monitoring station and the ground antennas |
