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Automatic tracking (Dcnsbyb)

Communication and control (D)
    Control (Dc)
         Use For: Control theory
        Navigation (Dcn)
            Navigational aids (Dcns)
                 Use For: Navaids; Navigation aids
                Navigation systems (Dcnsb)
                    Tracking systems (Dcnsby)
                        Automatic tracking (Dcnsbyb)
                        Radar tracking (Dcnsbyr)