RADIO AIDS TO NAVIGATION (Continued)  FAA Chart Users’ Guide - IFR Enroute Symbology 73 LOW ENROUTE CHARTS VOR/DME No Voice Communications (Y) Mode DME R - Receive only 122.1R Controlling FSS Name - BUFFALO Shadow NAVAID Box FSS Associated with NAVAID TACAN  TACAN Channels are without  voice but not underlined  Part Time NAVAID VORTAC Shutdown status DME DME Channel, Ident, Morse Code,  VHF Frequency NDB A - ASOS/AWOS Available Shutdown status  NDB/DME  No Voice Communications (Y) Mode DME Shadow NAVAID Box FSS Associated with NAVAID Notes: HIGH ENROUTE CHARTS VOR/DME  Off Route (Greyed NAVAID Box  and NAVAID) Service Volume - L DME in Y Mode  Shadow NAVAID Box FSS Associated with NAVAID  TACAN  Off Route  Off Route - Part Time NAVAID (Greyed NAVAID Box and NAVAID)  Service Volume - L VORTAC Off Route (Greyed NAVAID Box  and NAVAID)  Service Volume - L DME DME Channel, Ident,  VHF Frequency NDB NDB/DME No Voice Communications (Y) Mode DME Shadow NAVAID Box FSS Associated with NAVAID Notes:  Morse Code is not shown on High NAVAID Boxes. Navigation And Communication Boxes - Examples (Continued)