R | Red |
...R | Right (preceded by runway designation number to identify a parallel runway) |
R... | Restricted area (followed by identification) |
RA | Rain |
RAC | Rules of the air and air traffic services |
RADV | Minimum radar vectoring altitude chart |
RAG | Ragged |
RAG | Runway arresting gear |
RAI | Runway alignment indicator |
RAIM | Receiver autonomous integrity monitoring |
RB | Rescue boat |
RCA | Reach cruising altitude |
RCC | Rescue co−ordination centre |
RCF | Radiocommunication failure (message typ designator) |
RCH | Reach or reaching |
RCL | Runway centre line |
RCLL | Runway centre line light(s) |
RCLR | Recleared |
RDH | Reference datum height |
RDL | Radial |
RDO | Radio |
RDP | Radar data processing |
RE... | Recent (used to qualify weather phenomena e.g.recent rain = RERA) |
REC | Receive or receiver |
REDL | Runway edge light(s) |
REG | Registration |
RENL | Runway end light(s) |
REP | Report or reporting or reporting point |
REQ | Request or requested |
RERTE | Re−route |
RG | Range (lights) |
RHC | Right−hand circuit |
RIF | Reclearance in flight |
RL | Report leaving |
RLA | Relay to |
RLLS | Runway lead−in lighting system |
RMAC | Radar minimum altitude chart |
RMK | Remark |
RNAV | Area navigation (to be pronounced "AR−NAV") |
RNG | Radio range |
RNP | Required navigation performance |
ROC | Rate of climb |
ROD | Rate of descent |
ROFOR | Route forecast (in meteorological code) |
RPL | Repetitive flight plan |
RPLC | Replace or replaced |
RPS | Radar position symbol |
RQMNTS | Requirements |
RQP | Request flight plan (message type designator) |
RQS | Request supplementary flight plan (message type designator) |
RR | Report reaching |
RRA | Delayed meteorological message (or RRB, RRC ... etc., in sequence) (message type designator) |
RSC | Rescue sub−centre |
RSCD | Runway surface condition |
RSP | Responder beacon |
RSR | En−route surveillance radar |
RTD | Delayed (used to indicate delayed meteorological message |
RTE | Route |
RTF | Radiotelephone |
RTG | Radiotelehgraph |
RTHL | Runway threshold light(s) |
RTN | Return or returned or returning |
RTODAH | Rejected take−off distance available, helicopter |
RTS | Return to service |
RTT | Radioteletypewriter |
RTZL | Runway touchdown zone light(s) |
RUS | Russian language |
RUT | Standard regional route transmitting frequencies |
RV | Rescue vessel |
RVR | Runway visual range |
RVSM | Reduced vertical separation minimum (300 m (1000 ft)) between FL 290 and FL 410 |
RWY | Runway |