ILS

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VHF/UHF based landing beacon system designed to provide vertical (height, or altitude) guidance (glideslope - a beam that the aircraft can follow or "ride" down to the runway, following the glideslope indications (if the aircraft is too high, too low or on track to land), horizontal guidance (if the aircraft is to the left of the runway centerline, to the right of the runway centerline, or aligned with the runway) as well as positional guidance (markers - indicating to the pilot his location in relation to the runway threshold).   
VHF/UHF based landing beacon system designed to provide vertical (height, or altitude) guidance (glideslope - a beam that the aircraft can follow or "ride" down to the runway, following the glideslope indications (if the aircraft is too high, too low or on track to land), horizontal guidance (if the aircraft is to the left of the runway centerline, to the right of the runway centerline, or aligned with the runway) as well as positional guidance (markers - indicating to the pilot his location in relation to the runway threshold).   
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The ILS is gradually being replaced in day to day use by GPS based systems, but is maintained (along with the VOR system) as a backup and secondary navigational tool.   
+
The ILS is gradually being replaced in day to day use by [[GPS]] (SATNAV) based systems, but is maintained (along with the VOR system) as a backup and secondary navigational tool.   
-Will be updated at a later date, see also:
-Will be updated at a later date, see also:

Revision as of 19:26, 9 January 2023

Instrument Landing System, the "NAV" part of the VHF aircraft band "NAV/COM" 108-137 MHz band. NAV is 108.0 MHz to 117.95 MHz. VHF navigation band is shared between the localizer portion of ILS and the VOR system.

VHF/UHF based landing beacon system designed to provide vertical (height, or altitude) guidance (glideslope - a beam that the aircraft can follow or "ride" down to the runway, following the glideslope indications (if the aircraft is too high, too low or on track to land), horizontal guidance (if the aircraft is to the left of the runway centerline, to the right of the runway centerline, or aligned with the runway) as well as positional guidance (markers - indicating to the pilot his location in relation to the runway threshold).

The ILS is gradually being replaced in day to day use by GPS (SATNAV) based systems, but is maintained (along with the VOR system) as a backup and secondary navigational tool.

-Will be updated at a later date, see also:

ILS frequencies:

  • Marker beacons: 75.000 MHz (75 MHz)
  • Localizer: 108.100 MHz - 111.950 MHz (shared with VOR stations, see list below)
  • Glideslope: 329.150 MHz - 335.000 MHz


  • Localizer / Glide slope frequency pairs:
  • 108.10 MHz / 334.70 MHz
  • 108.15 MHz / 335.55 MHz
  • 108.30 MHz / 334.10 MHz
  • 108.35 MHz / 333.95 MHz
  • 108.50 MHz / 329.90 MHz
  • 108.55 MHz / 329.75 MHz
  • 108.70 MHz / 330.50 MHz
  • 108.75 MHz / 330.75 MHz
  • 108.90 MHz / 329.30 MHz
  • 108.95 MHz / 329.15 MHz
  • 109.10 MHz / 331.40 MHz
  • 109.15 MHz / 331.25 MHz
  • 109.30 MHz / 332.00 MHz
  • 109.35 MHz / 331.85 MHz
  • 109.50 MHz / 332.60 MHz
  • 109.55 MHz / 332.45 MHz
  • 109.70 MHz / 333.20 MHz
  • 109.75 MHz / 333.05 MHz
  • 109.90 MHz / 333.80 MHz
  • 109.95 MHz / 333.65 MHz
  • 110.10 MHz / 334.40 MHz
  • 110.15 MHz / 334.25 MHz
  • 110.30 MHz / 335.00 MHz
  • 110.35 MHz / 334.85 MHz
  • 110.50 MHz / 329.60 MHz
  • 110.55 MHz / 329.45 MHz
  • 110.70 MHz / 330.20 MHz
  • 110.75 MHz / 330.05 MHz
  • 110.90 MHz / 330.80 MHz
  • 110.95 MHz / 330.65 MHz
  • 111.10 MHz / 331.70 MHz
  • 111.15 MHz / 331.55 MHz
  • 111.30 MHz / 332.30 MHz
  • 111.35 MHz / 332.15 MHz
  • 111.50 MHz / 332.90 MHz
  • 111.55 MHz / 332.75 MHz
  • 111.70 MHz / 333.50 MHz
  • 111.75 MHz / 333.35 MHz
  • 111.90 MHz / 331.10 MHz
  • 111.95 MHz / 330.95 MHz



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