The Non-federal Program regulates a variety of systems, categorized below. Within those categories the FAA has approved certain system models for non-federal use in the National Airspace System.

List of Approved 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.*
• (APRT) Airborne Position Reference Tools
• (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 (MM) & Inner (IM) Markers
• (RTS) Remote Tower Systems
• (RVR) Runway Visual Ranges
• (ILS) Instrument Landing Systems
• (VOR) VHF Omni-Directional Ranges

Non-federal systems may also include certain types of:

• Automation equipment
• Communications equipment
• Surveillance equipment

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