AIM
4/3/14
Appendix 3−4
Abbreviations/Acronyms
Abbreviation/
Acronym
Meaning
RAA . . . . . . .
Remote Advisory Airport
RAIM . . . . . .
Receiver Autonomous Integrity Monitoring
STMP . . . . . .
Special Traffic Management Program
SWSL . . . . . .
Supplemental Weather Service Locations
RAIS . . . . . .
Remote Airport Information Service
RBDT . . . . . .
Ribbon Display Terminals
RCAG . . . . .
Remote Center Air/Ground
RCC . . . . . . .
Rescue Coordination Center
RCLS . . . . . .
Runway Centerline Lighting System
RCO . . . . . . .
Remote Communications Outlet
RD . . . . . . . .
Rotor Diameter
REIL . . . . . . .
Runway End Identifier Lights
REL . . . . . . .
Runway Entrance Lights
RFM . . . . . . .
Rotorcraft Flight Manual
RIL . . . . . . . .
Runway Intersection Lights
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
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
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
Abbreviation/
Acronym
Meaning
STARS . . . . .
Standard Terminal Automation
Replacement System
TA . . . . . . . . .
Traffic Advisory
TAA . . . . . . .
Terminal Arrival Area
TAC . . . . . . .
Terminal Area Chart
TACAN . . . .
Tactical Air Navigation
TAF . . . . . . .
Aerodrome Forecast
TAS . . . . . . .
True Air Speed
TCAS . . . . . .
Traffic Alert and Collision Avoidance
System
TCH . . . . . . .
Threshold Crossing Height
TD . . . . . . . .
Time Difference
TDLS . . . . . .
Tower Data Link System
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
TIBS . . . . . . .
Telephone Information Briefing Service
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
TWEB . . . . .
Transcribed Weather Broadcast
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