AIM
6/17/21
Abbreviation/
Acronym
Meaning
RFM . . . . . . . Rotorcraft Flight Manual
RLIM . . . . . . Runway Light Intensity Monitor
RMI . . . . . . . Radio Magnetic Indicator
RNAV . . . . . . Area Navigation
RNP . . . . . . . Required Navigation Performance
ROC . . . . . . . Required Obstacle Clearance
RPAT . . . . . . RNP Parallel Approach Runway
Transitions
RVR . . . . . . . Runway Visual Range
RVSM . . . . . . Reduced Vertical Separation Minimum
RWSL . . . . . . Runway Status Light
SAFO . . . . . . Safety Alerts For Operators
SAM . . . . . . . System Area Monitor
SAR . . . . . . . Search and Rescue
SAS . . . . . . . Stability Augmentation System
SATR . . . . . . Special Air Traffic Rules
SBAS . . . . . . Satellite
−
based Augmentation System
SCAT
−
1
DGPS . . . . . . Special Category I Differential GPS
SDF . . . . . . . Simplified Directional Facility
SFL . . . . . . . . Sequenced Flashing Lights
SFR . . . . . . . Special Flight Rules
SFRA . . . . . . Special Flight Rules Area
SIAP . . . . . . . Standard Instrument Approach Procedure
SID . . . . . . . . Standard Instrument Departure
SIGMET . . . . Significant Meteorological Information
SM . . . . . . . . Statute Mile
SMGCS . . . . Surface Movement Guidance Control
System
SNR . . . . . . . Signal
−
to
−
noise Ratio
SOIA . . . . . . Simultaneous Offset Instrument
Approaches
SOP . . . . . . . Standard Operating Procedure
SPC . . . . . . . Storm Prediction Center
SPS . . . . . . . . Standard Positioning Service
STAR . . . . . . Standard Terminal Arrival
STARS . . . . . Standard Terminal Automation
Replacement System
STMP . . . . . . Special Traffic Management Program
TA . . . . . . . . . Traffic Advisory
TAA . . . . . . . Terminal Arrival Area
TAC . . . . . . . Terminal Area Chart
TACAN . . . . Tactical Air Navigation
TAS . . . . . . . True Air Speed
TCAS . . . . . . Traffic Alert and Collision Avoidance
System
TCH . . . . . . . Threshold Crossing Height
TD . . . . . . . . Time Difference
TDLS . . . . . . Tower Data Link System
Abbreviation/
Acronym
Meaning
TDWR . . . . . Terminal Doppler Weather Radar
TDZ . . . . . . . Touchdown Zone
TDZE . . . . . . Touchdown Zone Elevation
TDZL . . . . . . Touchdown Zone Lights
TEC . . . . . . . Tower En Route Control
THL . . . . . . . Takeoff Hold Lights
TIS . . . . . . . . Traffic Information Service
TIS
−
B . . . . . . Traffic Information Service
−
Broadcast
TLS . . . . . . . Transponder Landing System
TPP . . . . . . . . Terminal Procedures Publications
TRSA . . . . . . Terminal Radar Service Area
TSO . . . . . . . Technical Standard Order
TWIB . . . . . . Terminal Weather Information for Pilots
System
UA . . . . . . . . Unmanned Aircraft
UAS . . . . . . . Unmanned Aircraft System
UAV . . . . . . . Unmanned Aerial Vehicle
UFO . . . . . . . Unidentified Flying Object
UHF . . . . . . . Ultrahigh Frequency
U.S. . . . . . . . United States
USCG . . . . . . United States Coast Guard
UTC . . . . . . . Coordinated Universal Time
UWS . . . . . . . Urgent Weather SIGMET
VAR . . . . . . . Volcanic Activity Reporting
VASI . . . . . . . Visual Approach Slope Indicator
VCOA . . . . . Visual Climb Over the Airport
VDA . . . . . . . Vertical Descent Angle
VDP . . . . . . . Visual Descent Point
VFR . . . . . . . Visual Flight Rules
VGSI . . . . . . Visual Glide Slope Indicator
VHF . . . . . . . Very High Frequency
VIP . . . . . . . . Video Integrator Processor
VMC . . . . . . Visual Meteorological Conditions
V
MINI
. . . . . . Instrument flight minimum speed, utilized
in complying with minimum limit speed
requirements for instrument flight
VNAV . . . . . . Vertical Navigation
V
NE
. . . . . . . Never exceed speed
V
NEI
. . . . . . . Instrument flight never exceed speed,
utilized instead of V
NE
for compliance with
maximum limit speed requirements for
instrument flight
VOR . . . . . . . Very High Frequency Omni
−
directional
Range
VORTAC . . .
VHF Omni
−
directional Range/Tactical Air
Navigation
VOT . . . . . . . VOR Test Facility
VR . . . . . . . . VFR Military Training Route
Appendix 3
−
4
Abbreviations/Acronyms