Appendix B - Acronyms and Abbreviations

CTC—contact DLA—delay or delayed CTL—control DLT—delete CTMA—Center Traffic Management Advisor DLY—daily CUPS—consolidated uniform payroll system DME—distance measuring equipment CVFR—controlled visual flight rules DME/P—precision distance measuring equipment CVTS—compressed video transmission service DMN—Data Multiplexing Network CW—continuous wave DMSTN—demonstration CWSU—Central Weather Service Unit DNL—day-night equivalent sound level (also called Ldn) CWY—clearway DOD—direct outward dial DoD—Department of Defense D DOI—Department of Interior DOS—Department of State DA—direct access; decision altitude/decision height; DOT—Department of Transportation Descent Advisor DOTCC—Department of Transportation Computer Center DABBS—DITCO automated bulletin board system DOTS—dynamic ocean tracking system DAIR—direct altitude and identity readout DP—dew point temperature DALGT—daylight DRFT—snowbank(s) caused by wind action DAR—Designated Agency Representative DSCS—digital satellite compression service DARC—direct access radar channel DSPLCD—displaced dBA—decibels A-weighted DSUA—dynamic special use airspace DBCRC—Defense Base Closure and Realignment DTS—dedicated transmission service Commission DUAT—direct user access terminal DBE—disadvantaged business enterprise DVFR—defense visual flight rules; day visual flight rules DBMS—database management system DVOR—doppler very high frequency omni-directional range DBRITE—digital bright radar indicator tower equipment DYSIM—dynamic simulator DCA—Defense Communications Agency DCAA—dual call, automatic answer device E DCCU—Data Communications Control Unit DCE—data communications equipment E—east DCMSND—decommissioned EA—environmental assessment DCT—direct EARTS—en route automated radar tracking system DDA—dedicated digital access EB—eastbound DDD—direct distance dialing ECOM—en route communications DDM—difference in depth of modulation ECVFP—expanded charted visual flight procedures DDS—Digital Data Service EDCT—expedite departure path DEA—Drug Enforcement Agency EFC—expect further clearance DEDS—data entry and display system EFIS—electronic flight information systems DEGS—degrees EIAF—expanded inward access features DEIS—Draft Environmental Impact Statement EIS—environmental impact statement DEP—depart/departure ELEV—elevation DEPPROC—departure procedures ELT—emergency locator transmitter DEWIZ—distance early warning identification zone ELWRT—electrowriter DF—direction finder EMAS—engineered materials arresting system DFAX—digital facsimile EMPS—en route maintenance processor system DFI—direction finding indicator EMS—environmental management system DGPS—Differential Global Positioning Satellite (System) E-MSAW—en route automated minimum safe altitude DH—decision height warning DID—direct inward dial ENAV—en route navigational aids DIP—drop and insert point ENG—engine DIRF—direction finding ENRT—en route DISABLD—disabled ENTR—entire DIST—distance EOF—emergency Operating Facility DITCO—Defense Information Technology Contracting EPA—Environmental Protection Agency Office Agency EPS—Engineered Performance Standards B-4