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
• (RTS) 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