FAA Chart Users’ Guide - IFR Enroute Symbology Pvt - Private Use The airport identifier in parentheses follows the airport name or Pvt. Associated city names for public airports are shown above or preceding the airport name and city name are the same only the airport  name is shown. City names for military and private airports are not shown. Airports shown on the Alask High Altitude Charts have a minimum hard or soft surface runway of 4000’. Airports shown on the U.S. High Altitude Charts have a minimum hard surface runway of 5000’. Non-IAP Airports shown on the U.S. Low Altitude Charts have a minimum hard surface runway of 3000’. All IAP Airports are shown on the Low Altitude Charts. Facilities in BLUE or GREEN have an approved Instrument Approach Procedure and/or RADAR MINIMA published in either the FAA  Terminal Procedures Publication or the DoD FLIPs. Those in BLUE have an Instrument Approach Procedure and/or RADAR MINIMA  published at least in the High Altitude DoD FLIPs. Facilities in BROWN do not have a published Instrument Procedure or RADAR  MINIMA. IFR ENROUTE LOW / HIGH ALTITUDE SYMBOLS  (U.S., PACIFIC AND ALASKA CHARTS) AIRPORTS Airport Data - Low/High Altitude Civil  Charts: High/Low Civil And Military  Charts: High/Low Military  Charts: High/Low Seaplane - Civil  Charts: Low Heliport  Charts: Low Emergency Use Only Pacific Only  AIRPORT DATA DEPICTION Low Altitude  5.   or   following the airport identifier indicates Class C or  Class D Airspace 4. “NO SVFR” above the airport name indicates FAR 91 fixed- wing special VFR flight is prohibited. 3. A solid line box enclosed the airport name indicates FAR 93  Special Requirements - see Directory/Supplement 2. Pvt - Private use, not available to general public 1. Airport elevation given in feet above or below mean sea level 6. Associated city names for public airports are shown above or  preceding the airport name. If airport name and city name are  the same, only the airport name is shown. The airport identifier in  parentheses follows the airport name. City names for military and  private airports are not shown. 7. Airport Ident ICAO Location Indicator shown outside contiguous  U.S. 8. AFIS Alaska only High Altitude - Alaska High Altitude - U.S. 69