Call for availability and to place an order The Airport/Facility Directory is a pilot's manual which contains data on public and joint use airports, seaplane bases, heliports, VFR airport sketches, NAVAIDs, communications data weather data sources, airspace, special notices, VFR waypoints and operational procedures.IFR Charts are updated every 56 days.  EC EAST CENTRALNC NORTH CENTRALNE NORTHEASTNW NORTHWESTSC SOUTH CENTRALSE SOUTHEASTSW SOUTHWESTACS SUPPLEMENT - ALASKA