ILS AND MARKER SYSTEM
The ILS sends to the flight crew or Autopilot (AP) signals for optimum descent path for landing. The ILS signal reception is done in part by the Multi-Mode Receiver (MMR). The system provides lateral guidance and vertical guidance to the aircraft approaching the runway.
The marker beacon system is a radio navigation aid that, in conjunction with an instrument landing system, indicates the distance between the A/C and the runway threshold. The marker function is done inside the VOR receivers, but it is only active in VOR 1.
There are three types of marker beacons on an ILS:
- the outer marker,
- the middle marker,
- the inner marker.
When the aircraft goes over the beacons, the marker beacon information is displayed flashing on the PFDs, with related audio signals.
The ILS information is displayed on the PFDs as 2 scales. One horizontal scale for the localizer signal and one vertical scale for the Glide Slope (G/S) signal.
Note that for redundancy:
- ILS 1 is displayed on PFD 1 and ND 2,
- ILS 2 is displayed on PFD 2 and ND 1.
Credit : Satyam Pandey
The marker beacon system is a radio navigation aid that, in conjunction with an instrument landing system, indicates the distance between the A/C and the runway threshold. The marker function is done inside the VOR receivers, but it is only active in VOR 1.
There are three types of marker beacons on an ILS:
- the outer marker,
- the middle marker,
- the inner marker.
When the aircraft goes over the beacons, the marker beacon information is displayed flashing on the PFDs, with related audio signals.
The ILS information is displayed on the PFDs as 2 scales. One horizontal scale for the localizer signal and one vertical scale for the Glide Slope (G/S) signal.
Note that for redundancy:
- ILS 1 is displayed on PFD 1 and ND 2,
- ILS 2 is displayed on PFD 2 and ND 1.
Credit : Satyam Pandey
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