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List of Non-Federal Systems


Systems regulated by the Non-Federal Program include, but are not limited to:

  • (ALS) Approach Lighting Systems that are part of a precision approach.*
  • (AWOS) Automated Weather Observing Systems
  • (DME) Distance Measuring Equipment
  • (GBAS) Ground Based Augmentation Systems
  • (GS) Glide Slopes
  • (LOC) Localizers
  • (NDB) Non-Directional Beacons
  • (OM) Outer Marker Beacons, as well as Middle & Inner Markers
  • (RT) Remote Tower Systems
  • (RVR) Runway Visual Ranges
  • (ILS) Instrument Landing Systems
  • (VOR) VHF Omni-Directional Ranges

* The Non-Federal Program regulates four types ALS, all of which are associated with precision instrument approaches. They are: ALSF-2, MALS, MALSF, and MALSR.

Non-Federal systems may also include certain types of:

  • Automation equipment
  • Communications equipment
  • Surveillance equipment

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