433 abbreviations
AbbreviationMeaning
NVDNight vision device
NVGNight vision goggles
OATOutside air temperature
OBSOmnibearing selector
OCCOperations Control Center
OMOuter marker
OWE/OEWOperating Weight Empty/Operating empty weight
PAPublic address system
PALPilot Activated Lighting
PAPIPrecision approach path indicator
PARPrecision approach radar
PCLPilot Controlled Lighting
P-CodeGPS precision code
PDProfile descent
PDOPPosition dilution of precision
PFDPrimary flight display or primary flight director
PMGPermanent magnet generator
PNDPrimary navigation display
PNRPassive noise reduction
POFPhase of flight
POSPosition
P-RNAVprecision area navigation
PSRPrimary surveillance radar
PSUPassenger service unit
PTTPush-to-talk
QARQuick Access Recorder
QNHBarometric pressure adjusted to sea level
QRHQuick Reference Handbook
RAResolution advisory (TCAS)
RAIRadio altimeter indicator
RAIMReceiver-autonomous integrity monitoring, also remote autonomous integrity monitoring
RALTRadar or radio altimeter
RATRam air turbine
RCRReverse current relay
RCVRReceiver
RDMIRadio distance magnetic indicator
RDPRadar data processing system
RDRRadar
REFReference
REILRunway end identifier lights
RELRelative
RFRadio frequency
RFIRadio frequency interference
RHSMReduced horizontal separation minimal
RLGRing laser gyroscope
RLYRelay
RMIRadio magnetic indicator
R-NAVArea navigation
RNGRange
RNPRequired navigation performance