ATIS—Automatic Terminal Information Service ATS—Air Traffic Service AWC—Aviation Weather Center AWOS—Automated Weather Observing System AWSS—Automated Weather Sensor System 

## B 

Baro-VNAV—Barometric Vertical Navigation B-RNAV—European Basic RNAV 

## C 

CAT—Category CDI—Course Deviation Indicator CDL—Configuration Deviation List CENRAP—Center Radar ARTS Processing CFA—Controlled Firing Areas CFIT—Controlled Flight Into Terrain CFR—Code of Federal Regulations CNF—Computer Navigation Fix COP—Changeover Point COTS—Commercial Off-The-Shelf CRC—Cyclic Redundancy Check CS—Chart Supplement CTAF—Common Traffic Advisory Frequency CVFP—Charted Visual Flight Procedure CWAS—Center Weather Advisories 

## D 

DA—Density Altitude; Decision Altitude D-ATIS—Digital Automatic Terminal Information Service D-CS—Digital Chart Supplement DDA—Derived Decision Altitude DEM—Digital Elevation Model DER—Departure End of the Runway DF—Direction Finding DH—Decision Height DME—Distance Measuring Equipment DOD—Department of Defense DOT—Department of Transportation DPs—Departure Procedures DRVSM—Domestic Reduced Vertical Separation Minimums DUATS—Direct User Access Terminal System DVA—Diverse Vector Area 

## E 

E/D—End of Decent EDCT—Expect Departure Clearance Time EFAS—En-Route Flight Advisory Service EFB—Electronic Flight Bag EFC—Expect Further Clearance EFV—Enhanced Flight Visibility 

