An NDB transmits a signal pattern in the horizontal plane which is:
Domanda 50, Radio Navigation - ATPL - Airline Transport Pilot license
| Omnidirectional |
| A beam rotating at 30 Hz |
| A cardioid balanced at 30 Hz |
| Bi-lobal circular |
| Omnidirectional |
| A beam rotating at 30 Hz |
| A cardioid balanced at 30 Hz |
| Bi-lobal circular |
