AIRPORT/FACILITY DIRECTORY- A publication designed primarily as a pilot's operational manual containing all airports, seaplane bases, and heliports open to the public including communications data, navigational facilities, and certain special notices and procedures. This publication is issued in seven volumes according to geographical area.
From the Pilot's Handbook of Aeronautical Knowledge:
- Airport/Facility Directory (A/FD). An FAA publication containing information on all airports, communications, and NAVAIDs.