.
see also: instrument approach waypoints

Fr: point de cheminement terminal vent arrière
DR Abbreviation for: dead reckoning navigation Fr: DR
drag chute
A parachute device installed on certain aircraft that is deployed to assist in deceleration of the aircraft.
Fr: parachute de freinage
drifting snow
Snow that is raised less than approximately 7 ft above ground.
Fr: chasse-neige basse
DTA Abbreviation for: distance of turn anticipation Fr: DTA
DTW Abbreviation for: downwind termination waypoint Fr: DTW
DUATS Abbreviation for: Direct User Access Terminal System Fr: DUATS
DVFR Abbreviation for: defence visual flight rules Fr: DVFR
D-VOLMET Abbreviation for: data link VOLMET Fr: D-VOLMET 
E

EAC Abbreviation for: expected approach clearance time Fr: EAC
EAT Abbreviation for: expected approach time Fr: EAT
ECC Abbreviation for: emergency co-ordination centre Fr: ECC
ECCM Abbreviation for: electronic counter-countermeasures Fr: ECCM
ECM Abbreviation for: electronic countermeasures Fr: ECM
EDCT U.S.: Abbreviation for: expected departure clearance time
EEP Abbreviation for: end exercise point Fr: EEP
EET Abbreviation for: estimated elapsed time Fr: EET
EFC Abbreviation for: expected further clearance time Fr: EFC
effective coverage The area surrounding a non-directional beacon (NDB) within which bearings can be obtained with an accuracy sufficient for the nature of the operation concerned. Fr: couverture effective
electronic counter-countermeasures The division of electronic warfare involving actions taken to ensure friendly, effective use of the electromagnetic spectrum despite the enemy’s use of electronic warfare.
.
abbreviation: ECCM

.
see also: electronic countermeasures

Fr: contre-contre-mesures électroniques
electronic countermeasures The division of electronic warfare involving actions taken to prevent or reduce an enemy’s effective use of the electromagnetic spectrum. ECMs include
(a)
electronic jamming; and

(b)
 electronic deception.

.
abbreviation: ECM

.
see also: electronic counter-countermeasures

Fr: contre-mesures électroniques
electronic deception Electronic countermeasures (ECM) consisting of the deliberate radiation, reradiation, alteration, absorption, or reflection of electromagnetic energy in a manner intended to mislead an enemy in the interpretation or use of information received by his or her electronic systems. There are two categories of electronic deception: