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Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
97-2 Data Base Standardization for the Global Positioning System (GPS) Overlay Program

This advisory circular (AC) contains information and guidance to be used by data base vendors that develop data for use in the National Airspace System (NAS) for the non precision GPS overlay program.

Cancelled AFS-420 1993-11-19
97-1A Runway Visual Range (RVR)

This advisory circular is issued to describe RVR measuring equipment and its operating use.

 Cancelled AFS-400 1977-09-28