15 FAA Chart Users’ Guide - VFR Terms and Symbols RADIO AIDS TO NAVIGATION AIRPORTS  Hard-surfaced runways greater than 8069’ or some multiple runways less than 8069’  Hard-surfaced runways 1500’ to 8069’  Other than hard-surfaced runways  Seaplane bases Airports in the following categories are charted as indicated (additional symbols are shown later in this Section). Public use airports: Military airports: Other than hard-surfaced runways Hard-surfaced runways are depicted the same as public-use airports. U.S. military airports are identified by abbreviations such as AAF (Army Air Field), AFB (Air Force Base), MCAS (Marine  Corps Air Station), NAS (Naval Air Station), NAV (Naval Air Facility), NAAS (Naval Auxiliary Air Station), etc. Canadian  military airports are identified by the abbreviation DND (Department of National Defense). Fuel Available: Fuel availability indicated by use of tick marks around the basic airport symbol. Consult Chart Supplement  for details and availability. Other airports with or without fuel: DMEs are shown without the compass rose.  The type of NAVAID will be identified by: "VOR," (VHF Omni-Directional Range)  "VORTAC" (VOR Tactical Aircraft Control), "VOR-DME," (VOR-Distance Measuring  Equipment) or “DME” (Distance Measuring Equipment) positioned on and breaking  the top line of the NAVAID box. A NAVAID that is physically located on an airport may not always be represented as a  typical NAVAID symbol. A small open circle indicates the NAVAID location when  collocated with an airport icon. those items that differ (e.g., frequency, Morse Code) are repeated in the box in the appropriate color. The choice of  separate or combined boxes is made in each case on the basis of economy of space and clear identification of the radio  aids. avoided. When two or more radio aids in a general area have the same name with different frequencies, Tactical Air Navigation  (TACAN) channel numbers, or identification letters, and no  misinterpretation can result, the name of the radio aid may be  indicated only once within the identification box. Very High  Frequency/Ultra High Frequency (VHF/UHF) NAVAID names  and identification boxes (shown in blue) take precedence. Only  On VFR Charts, information about radio aids to navigation (NAVAID) are boxed, as illustrated. Duplication of data is 