NAVAIDS Localizer Depiction Restrictive Airspeeds Along the Procedure Track FAA Chart Users’ Guide - Terminal Procedures Publication (TPP) - Terms 102 NAVAIDs used on ground based charts will show the appropriate symbol accompanied by a data box that contains the  facility name, frequency, identifier and Morse code. A NAVAID box with a heavy line indicates the primary NAVAID used for  the approach. NAVAIDs used on GPS based charts show the appropriate symbol identified with the name and identifier. The localizer is depicted in the Planview using the following symbol. The size of the charted localizer symbol does not  serve as an indication of the service volume. Restrictive airspeeds along the procedure track are shown paired with their respective fix/facility. Type Description Example Recommended Speed Recommended speed is depicted with no lines above or below it Minimum Speed Minimum speed is depicted as a number with a line below it Maximum Speed Maximum speed is depicted as a number with a line above it Mandatory Speed Mandatory speed is depicted as a number with a line above and below it Primary NAVAID - LOC Secondary NAVAID - VORDME Primary NAVAID - NDB/DME  Secondary NAVAID - NDB/DME NAVAID - ILS Approach NAVAID - RNAV Approach