CSU  Configuration Strapping Unit: A LRU used to
select.installed.system.features.on.a.particular. aircraft.
CT  Chromaticity.Tolerance
CTA  ( 1 ) Control Area (ICAO Term) . (.2.).Controlled.Time.of.Arrival
CTAF Common Traffic Advisory Frequency CTAI Cowl.Thermal.Anti-Icing CTAS Center.Tracon.Automation.System CTC Cabin.Temperature.Controller CTD Cross.Track.Deviation CTL Control: Refers to a radio frequency controller CTMO Centralized Air Traffic Flow Management
Organization CTOL Conventional Take Off and Landing CTR (.1.).Center..
(.2.).Control.zone
CTRD Configuration Test Requirements Document CTRL Control CTS Clear.To.Send CTU Cabin.Telecommunications.Unit CU (.1.).Channel.Utilization..
(.2.).Combiner.Unit.(HUD).. (.3.).Control.Unit C/UT Code/Unit.Test CV/DFDR Cockpit.Voice.and.Digital.Flight.Data.Recorder CVR Cockpit.Voice.Recorder CVRCP Cockpit.Voice.Recorder.Control.Panel
CW  (.1.).Clockwise.(cw).. (.2.).Continuous.Wave..A.continuous.train.of. identical.oscillations.
CWC Comparator.Warning.Computer CWI Continuous.Wave.Interference

CWM Comparator.Warning.Monitor CWP (.1.).Controlled.Working.Position.
(.2.).Controller.Working.Position CWS Control.Wheel.Steering DPSK Differential.Eight.Phase.Shift.Keying D&O Description and Operation DA (.1.).Descent.Advisor..
(.2.).Drift.Angle D/A Digital-to-Analog DABS Discrete.Addressable.Beacon.System DADC Digital.Air.Data.Computer DADS Digital.Air.Data.System DAP Digital.Service.Access.Product DAPs Downlink.of.Aircraft.Parameters DAR Designated.Airworthiness.Representative-A.
designation.of.authority.by.the.FAA,.authorized. under.FAR.Part.183,.Subpart.C. DARP Dynamic.Aircraft.Route.Planning DARC Direct.Access.Radar.Channel..An.independent. backup.to.main.ATC.computers. DARPA Defense.Advanced.Research.Projects.Agency DARPS Dynamic.Aircraft.Route.Planning.Study
DAS  Designated.Alteration.Station:.A.designation.of. Authority.authorized.by.the.FAA.under.FAR.Part. 21,.Subpart.M.