Dopp - eart
- Doppler correlation
- Doppler detection
- Doppler distance-gone indicator
- Doppler drift
- Doppler effect
- Doppler frequency shift
- Doppler hover indicator
- Doppler navigation
- Doppler processor
- Doppler radar
- Doppler shift factor
- dorsal
- dorsal fin
- dose
- dosimeter
- dot
- dot echoes
- dot-and-dash code
- double
- double channel communication
- double channel duplex
- double ring
- double sideband
- double-acting propeller
- double-base propellant
- double-bubble fuselage
- double-decker aircraft
- double-flow engine
- double-head wrench
- double-row radial engine
- double-shock diffuser
- double-slotted flap
- double-slotted inboard flap
- doubledual-rotor helicopter
- dovetail blade attachment
- dovetail groove
- dovetailed blade
- down gust
- down leg
- down link
