A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

RRed
...RRight (preceded by runway designation number to identify a parallel runway)
R...Restricted area (followed by identification)
RARain
RACRules of the air and air traffic services
RADVMinimum radar vectoring altitude chart
RAGRagged
RAGRunway arresting gear
RAIRunway alignment indicator
RAIMReceiver autonomous integrity monitoring
RBRescue boat
RCAReach cruising altitude
RCCRescue co−ordination centre
RCFRadiocommunication failure (message typ designator)
RCHReach or reaching
RCLRunway centre line
RCLLRunway centre line light(s)
RCLRRecleared
RDHReference datum height
RDLRadial
RDORadio
RDPRadar data processing
RE...Recent (used to qualify weather phenomena e.g.recent rain = RERA)
RECReceive or receiver
REDLRunway edge light(s)
REGRegistration
RENLRunway end light(s)
REPReport or reporting or reporting point
REQRequest or requested
RERTERe−route
RGRange (lights)
RHCRight−hand circuit
RIFReclearance in flight
RLReport leaving
RLARelay to
RLLSRunway lead−in lighting system
RMACRadar minimum altitude chart
RMKRemark
RNAVArea navigation (to be pronounced "AR−NAV")
RNGRadio range
RNPRequired navigation performance
ROCRate of climb
RODRate of descent
ROFORRoute forecast (in meteorological code)
RPLRepetitive flight plan
RPLCReplace or replaced
RPSRadar position symbol
RQMNTSRequirements
RQPRequest flight plan (message type designator)
RQSRequest supplementary flight plan (message type designator)
RRReport reaching
RRADelayed meteorological message (or RRB, RRC ... etc., in sequence) (message type designator)
RSCRescue sub−centre
RSCDRunway surface condition
RSPResponder beacon
RSREn−route surveillance radar
RTDDelayed (used to indicate delayed meteorological message
RTERoute
RTFRadiotelephone
RTGRadiotelehgraph
RTHLRunway threshold light(s)
RTNReturn or returned or returning
RTODAHRejected take−off distance available, helicopter
RTSReturn to service
RTTRadioteletypewriter
RTZLRunway touchdown zone light(s)
RUSRussian language
RUTStandard regional route transmitting frequencies
RVRescue vessel
RVRRunway visual range
RVSMReduced vertical separation minimum (300 m (1000 ft)) between FL 290 and FL 410
RWYRunway
(C) 2012-18 Jan Hrkal