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Aircraft navigational aids (Dcnsyb)

Communication and control (D)
    Control (Dc)
         Use For: Control theory
        Navigation (Dcn)
            Navigational aids (Dcns)
                 Use For: Navaids; Navigation aids
                Navigational aids specific to a craft or vehicle (Dcnsy)
                    Aircraft navigational aids (Dcnsyb)
                         Use For: Aeronautical instruments
                        Distance measuring equipment (Dcnsybd)
                             Use For: DME
                        Landing aids (Dcnsybm)
                        Stabilized platforms (Dcnsybp)
                        Tactical air navigation system (Dcnsybq)
                             Use For: Tacan
                    Motor vehicle navigational aids (Dcnsyh)
                         Use For: Electronic driving aids
                         Related Term (Associative): Driver information systems (Dsfpd); Vehicle electronics (Qpv)
                    Ship navigational aids (Dcnsys)