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TRB Publications IndexResearch in ProgressTRID
Computer viruses () Communication and control (D) Control (Dc) Use For: Control theory Navigation (Dcn) Navigation processes (Dcnb) Navigational aids (Dcns) Use For: Navaids; Navigation aids Navigation systems (Dcnsb) Navigation charts (Dcnsj) Related Term (Associative): Charts (Xxvmc) Navigation devices (Dcnsp) Related Term (Associative): Instrument panels (Qpeyj) Navigational aids by reference to craft (Dcnsx) Navigational aids specific to a craft or vehicle (Dcnsy) Distress alerting systems (Dcnsz) Obstructions (Navigation) (Dcnu) Use For: Obstacles (Navigation)