CTC —contact 

CTL —control 

CTMA —Center Traffic Management Advisor 

CUPS —consolidated uniform payroll system 

CVFR —controlled visual flight rules 

CVTS —compressed video transmission service 

CW —continuous wave 

CWSU —Central Weather Service Unit 

CWY —clearway 

## D 

DA —direct access; decision altitude/decision height; Descent Advisor 

DABBS —DITCO automated bulletin board system 

DAIR —direct altitude and identity readout 

DALGT —daylight 

DAR —Designated Agency Representative 

DARC —direct access radar channel 

dBA —decibels A-weighted 

DBCRC —Defense Base Closure and Realignment Commission 

DBE —disadvantaged business enterprise 

DBMS —database management system 

DBRITE —digital bright radar indicator tower equipment 

DCA —Defense Communications Agency 

DCAA —dual call, automatic answer device 

DCCU —Data Communications Control Unit 

DCE —data communications equipment 

DCMSND —decommissioned 

DCT —direct 

DDA —dedicated digital access 

DDD —direct distance dialing 

DDM —difference in depth of modulation 

DDS —Digital Data Service 

DEA —Drug Enforcement Agency 

DEDS —data entry and display system 

DEGS —degrees 

DEIS —Draft Environmental Impact Statement 

DEP —depart/departure 

DEPPROC —departure procedures 

DEWIZ —distance early warning identification zone 

DF —direction finder 

DFAX —digital facsimile 

DFI —direction finding indicator 

DGPS —Differential Global Positioning Satellite (System) 

DH —decision height 

DID —direct inward dial 

DIP —drop and insert point 

DIRF —direction finding 

DISABLD —disabled 

DIST —distance 

DITCO —Defense Information Technology Contracting Office Agency 

DLA —delay or delayed 

DLT —delete 

DLY —daily 

DME —distance measuring equipment 

DME/P —precision distance measuring equipment 

DMN —Data Multiplexing Network 

DMSTN —demonstration 

DNL —day-night equivalent sound level (also called Ldn) 

DOD —direct outward dial 

DoD —Department of Defense 

DOI —Department of Interior 

DOS —Department of State 

DOT —Department of Transportation 

DOTCC —Department of Transportation Computer Center 

DOTS —dynamic ocean tracking system 

DP —dew point temperature 

DRFT —snowbank(s) caused by wind action 

DSCS —digital satellite compression service 

DSPLCD —displaced 

DSUA —dynamic special use airspace 

DTS —dedicated transmission service 

DUAT —direct user access terminal 

DVFR —defense visual flight rules; day visual flight rules 

DVOR —doppler very high frequency omni-directional range 

DYSIM —dynamic simulator 

## E 

E —east 

EA —environmental assessment 

EARTS —en route automated radar tracking system 

EB —eastbound 

ECOM —en route communications 

ECVFP —expanded charted visual flight procedures 

EDCT —expedite departure path 

EFC —expect further clearance 

EFIS —electronic flight information systems 

EIAF —expanded inward access features 

EIS —environmental impact statement 

ELEV —elevation 

ELT —emergency locator transmitter 

ELWRT —electrowriter 

EMAS —engineered materials arresting system 

EMPS —en route maintenance processor system 

EMS —environmental management system 

E-MSAW —en route automated minimum safe altitude warning 

ENAV —en route navigational aids 

ENG —engine 

ENRT —en route 

ENTR —entire 

EOF —emergency Operating Facility 

EPA —Environmental Protection Agency 

EPS —Engineered Performance Standards 

