Which one of the following methods is used by a Microwave Landing System (MLS) to indicate distance from the runway threshold?
Domanda 126, Radio Navigation - ATPL - Airline Transport Pilot license
| Timing the interval between the transmission and reception of primary radar pulses from the aircraft to MLS station |
| Measurement of the frequency shift between the MLS azimuth and elevation transmissions |
| A precision facility DME |
| + or - 50° of the runway centre-line |
