R
- race
- radar
- radar approach
- radar contact
- radar control
- radar controller
- radar data
- radar display
- radar identification
- radar map
- radar monitoring
- radar position indication
- radar position symbol
- radar separation
- radar service
- radar surveillance
- radar track position
- radar unit
- radar vectoring
- radial
- radial engine
- radian
- radio-frequency
- radio altimeter
- radio direction-finding station
- radio direction finder
- radio direction finding
- radio navigation aid
- radio wave
- radionavigation
- radiosonde
- radiosonde station
- radiotelephony
- radome
- rain shower
- raingauge
- raingauge shield
- ram air temperature
- ram air turbine
- ramjet engine
- ramming intake
- rapid deceleration
- rapid exit taxiway
- rapid exit taxiway indicator lights
- rate of climb
- rate of descent
- rated air traffic controller
- rated takeoff thrust
- rating
- reaction engine
- readback
- real time
- rearward flight
- receiver aircraft (1)
- receiver aircraft (2)
- receiver autonomous integrity monitoring
- receiving unit
- reciprocity
- reconnaissance flight
- recovery position
- reduced runway separation minima
- reduced vertical separation minimum
- reducing valve
- reference humidity
- refuelling
- refuelling boom
- refuelling hose
- regional accident and incident investigation organization
- regional air service
- regional aircraft
- regional aviation
- regional carrier
- regional hub
- regional jet
- regional safety oversight organization
- registered baggage
- regulated agent
- rejected take-off distance available (helicopter)
- rejected takeoff
- relative wind
- release of goods
- relief
- relief flight
- relief flights
- relief valve
- remote air traffic control towers
- remote pilot
- remote pilot station
- remotely-piloted aircraft system
- remotely piloted aircraft
- remotely piloted aircraft system panel
- removal of a person
- removal order
- rendezvous point
- repair
- repetitive flight plan
- reporting point
- required navigation performance
- requirement
- rescue
- rescue and firefighting
- rescue and firefighting service
- rescue boat
- rescue coordination centre
- rescue operation
- rescue strap
- rescue subcentre
- rescue unit
- reserve parachute
- resolution of safety concerns
- respiratory protection equipment
- response time
- rest period
- restricted area
- resultant wind
- retarder parachute
- retractable landing gear
- retreating blade
- revenue passenger-kilometres
- reversal procedure
- reverse pitch
- reversible-pitch propeller
- revolutions per minute
- rhumb line
- rib
- ribbon parachute
- rigging line
- right-handed engine
- right of overflight
- right of technical stop
- rigid airship
- risk
- risk assessment
- risk management
- risk not determined
- risk of collision
- RNP type
- road
- road-holding position
- road-holding position marking
- rocket
- rocket motor
- roger
- roll
- roll guidance
- romeo
- rotary-wing aircraft
- rotating stall
- rotation speed
- rotor
- rotor blade (airfoil)
- rotor brake
- rotor disk
- rotor lift
- rotorcraft
- route
- route segment
- route stage
- rudder
- rudder pedal
- ruddervator
- running landing
- runway
- runway-holding position
- runway-in-use
- runway centerline lighting
- runway centre line marking
- runway condition assessment matrix
- runway condition code
- runway condition report
- runway designation marking
- runway edge lights
- runway end lights
- runway end safety area
- runway excursion
- runway exit sign
- runway guard lights
- runway heading
- runway incursion
- runway lead-in lighting system
- runway side stripe marking
- runway slope
- runway status lights
- runway strip
- runway surface condition
- runway surface condition descriptor
- runway threshold
- runway threshold identification lights
- runway threshold light(s)
- runway turn pad
- runway visual range