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Warning radio beacons (Dcnspbsw)

Communication and control (D)
    Control (Dc)
         Use For: Control theory
        Navigation (Dcn)
            Navigational aids (Dcns)
                 Use For: Navaids; Navigation aids
                Navigation devices (Dcnsp)
                     Related Term (Associative): Instrument panels (Qpeyj)
                    Beacons (Dcnspb)
                        Radio beacons (Dcnspbs)
                            Warning radio beacons (Dcnspbsw)