ATPL: An aircraft carrying out an ILS approach is receiving more 90 Hz than 150 Hz modulation notes from both the localiser and glidepath transmitters. The ILS indication will show:
Domanda 177, Radio Navigation - ATPL - Airline Transport Pilot license
| Fly left and fly up |
| Fly right and fly down |
| Fly right and fly up |
| 24 seconds (= 1 second per data frame) |
