Q

QAR QC QEC QFE
QNE
QNH
QOP QOS QRH Quadrantral
Error
R RA
Rabbit Tracks
Radar
Quick Access Recorder
Quality Control
Quadrantral Error Corrector
A method of setting the altimeter to compensate for changes in barometric pressure and runway elevation. Pilot receives information from airfield and adjusts his altimeter accordingly and it will read zero altitude at touchdown on the runway.
The method of setting the altimeter to the standard atmosphere datum -29.92 inches of mercury (1,013.25 mb). This setting is used in the United States airspace by all aircraft above FL180.
The more common method of setting the altimeter to compensate for changes in barometric pressure. Pilot receives information from airfield,adjusts his altime-ter accordingly and the altimeter will read airfield ele-vation at touchdown.
Quality Operating Procedures
Quality of Service
Quick Reference Handbook
Error in the relative bearing caused by the distortion of the received radio signal (rf fields) by the structure of the aircraft.
R
Right
(1)
 Resolution Advisory (generated by TCAS)

(2)
 Radio Altimeter

Rabbit Tracks,or running rabbits, refer to the distinc-tive display produced by another (alien radar) radar system transmission.
Radio Detecting And Ranging. A system that measures distance and bearing to an object.
Radar Mile  The time interval (approximately 12.359 microsec-
onds) required for radio waves to travel one nautical 
mile and return (total of 2 nmi). 
Radial  A line of direction going out from a VOR station mea-
sured as a bearing with respect to magnetic north. 
Radome  The radome is the protective cover on the aircraft 
nose that fits over the weather radar system antenna. 
The radome is transparent at radar frequencies. 
RAI  Radio Altimeter Indicator 
RAIM  Receiver Autonomous Integrity Monitoring 
RALT  Radio Altimeter (also RA,RADALT, LRA,LRRA)