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

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