R

RENAR Réseau de la Navigation Aérienne (F network)
REP Report
REP Field Repetition Indicator
RER Residual Error Rate
RER Rerouting
RES Radar Environment Simulator
RES Radar Environment System
RESA Runway End Safety Area (ICAO)
RESP Response (ICAO)
RESTQ Recovery Stress Questionnaire
RET Airborne & ground retrofit (issues)
RET Rapid Exit Taxi Way
RET Revised EOBT
RETD Revised Estimated Time of Departure
REV REVision / REVise (message)
RF Radius to a Fix (ARINC 424 Path Terminator)
RF Radio Frequency
RFC Request for Comment
RFC Radar Fallback Communication System
RFCA Panel on Route Facility, Cost Accounting and Cost Allocation (ICAO)
RFCP Route Facility Costs Panel (ICAO)
RFEP Radar Front End Processor
RFF Radar Fall-back Facility
RFG Radio Frequency Generator
RFI Radio Frequency Interferences
RFL Requested Flight Level *
RFLT Radio Frequency Unit *
RFM Remote Field Monitor
RFP Request for Proposal
RFP Replacement Flight Plan (IFPS)
RFPD Repetitive Flight Plan Data