Cold Soak
8th Aug 2001, 13:42
So this is what what all those TLA's mean... (three letter abbreviations!)
A
A/A Air to Air
AAF Army Air Field
AAL Above Aerodrome Level
AAS Airport Advisory Service
AB Air Base
ABM Abeam
ABN Aerodrome Beacon
AC Air Carrier
ACA Arctic Control Area
ACA Approach Control Area
ACAS Airborne Collision Avoidance System
ACARS Airborne Communications Addressing and Reporting System
ACC Area Control Center
ACFT Aircraft
ACN Aircraft Classification Number
AD Aerodrome
ADA Advisory Area
ADF Automatic Direction Finding
ADIZ Air Defense Identification Zone
ADR Advisory Route
ADV Advisory Area
AEIS Aeronautical Enroute Information Service
AER Approach End Runway
AERADIO Air Radio
AERO Aerodrome
AF Aux Air Force Auxiliary Field
AFB Air Force Base
AFIS Aerodrome Flight Information Service
AFN American Forces Network
AFRS Armed Forces Radio Stations
AFS Air Force Station
AFSS Automated Flight Service Station
A/G Air-to-Ground
AGL Above Ground Level
AGNIS Azimuth Guidance Nose-in-Stand
AH Alert Height
AHP Army Heliport
AIRAC Aeronautical Information Regulation and Control
AIREP Air-Report
ALA Authorized Landing Area
ALF Auxiliary Landing Field
ALT Altitude
ALTN Alternate
AMA Area Minimum Altitude
AMSL Above Mean Sea Level
ANGB Air National Guard Base
AOE Airport/Aerodrome of Entry
AOR Area of Responsibility
APAPI Abbreviated Precision Approach Path Indicator
APC Area Positive Control
APCH Approach
APP Approach Control
APT Airport
ARB Air Reserve Base
ARINC Aeronautical Radio, Inc.
ARO ATS Reporting Office
ARR Arrival
ARTCC Air Route Traffic Control Center
ASDA Accelerate Stop Distance Available
ASOS Automated Surface Observation System
ASR Airport Surveillance Radar
ATA Actual Time of Arrival
ATCAA Air Traffic Control Assigned Airspace
ATCC Air Traffic Control Center
ATCT Air Traffic Control Tower
ATD Actual Time of Departure
ATF Aerodrome Traffic Frequency
ATFM Air Traffic Flow Management
ATIS Automatic Terminal Information Service
ATS Air Traffic Services
ATZ Aerodrome Traffic Zone
AUTH Authorized
AUW All-up Weight
AUX Auxiliary
AVBL Available
AWIB Aerodrome Weather Information Broadcast
AWOS Automated Weather Observing System
AWY Airway
B
BC Back Course
BCM Back Course Marker
BCN Beacon
BCOB Broken Clouds or Better
BCST Broadcast
BDRY Boundary
BLDG Building
BM Back Marker
BRG Bearing
B-RNAV Basic RNAV
BS Broadcast Station (Commercial)
C
C ATC IFR Flight Plan Clearance Delivery Frequency
CADIZ Canadian Air Defense Identification Zcne
CARS Community Aerodrome Radio Station
CAT Category
CDI Course Deviation Indicator
CDR Conditional Route
CDT Central Daylight Time
CEIL Ceiling
CERAP Combined Center/Radar Approach Control
CGAS Coast Guard Air Station
CGL Circling Guidance Lights
CH Channel
CH Critical Height
CMNPS Canadian Minimum Navigation Performance Specification
CNF Computer Navigation Fix
CO County
COMLO Compass Locator
COMM Communications
CONT Continuous
COORD Coordinates
COP Change Over Point
CORR Corridor
CP Command Post
Cpt Clearance (Pre-Taxi Procedure)
CRS Course
CST Central Standard Time
CTA Control Area
CTAF Common Traffic Advisory Frequency
CTL Control
CTR Control Zone
CVFR Controlled VFR
D
D Day
DA Decision Altitude
DA (H) Decision Altitude (Height)
D-ATIS Digital ATIS
DCT Direct
DECMSND Decommissioned
DEG Degree
DEP Departure Control
DEPARTURE Departure Procedure
DER Departure End of Runway
DEWIZ Distance Early Warning Identification Zone
DISPL THRESH Displaced Threshold
DIST Distance
DME Distance Measuring Equipment
DOD Department of Defense
DOM Domestic
DP Departure Procedure
E
E East or Eastern
EAT Expected Approach Time
ECOMS Jeppesen Explanation of Common Minimum Specifications
EDT Eastern Daylight Time
EET Estimated Elapsed Time
EFAS Enroute Flight Advisory Service
EFF Effective
ELEV Elevation
EMERG Emergency
ENG Engine
EOBT Estimated Off Block Time
EST Eastern Standard Time
ETA Estimated Time of Arrival
ETD Estimated Time of Departure
ETE Estimated Time Enroute
ETOPS Extended Range Operation with two engine airplanes
F
FAA Federal Aviation Administration
FAF Final Approach Fix
FAP Final Approach Point
FAR Federal Aviation Regulation
FCP Final Control Point
FIC Flight Information Center
FIR Flight Information Region
FIS Flight Information Service
FL Flight Level (Altitude)
FLD Field
FLG Flashing
FLT Flight
FM Fan Marker
FMS Flight Management System
FPM Feet Per Minute
FREQ Frequency
FSS Flight Service Station
FT Feet
FTS Flexible Track System
G
G Guards only (radio frequencies)
GA General Aviation
GCA Ground Controlled Approach (radar)
GCO Ground Communications Outlet
GEO Geographic or True
GLONASS Global Orbiting Navigation Satellite System
GMT Greenwich Mean Time
GND Ground Control
GND Surface of the Earth (either land or water)
GNSS Global Navigation Satellite System
GP Glidepath
GPS Global Positioning System
GS Glide Slope
G/S Ground Speed
GWT Gross Weight
H
H Non-directional Radio Beacon or High Altitude
H24 24 Hour Service
HAA Height Above Airport
HAS Height Above Site
HAT Height Above Touchdown
HC Critical Height
HDG Heading
HF High Frequency (3-30 MHz)
HI High (altitude)
HI High Intensity (lights)
HIALS High Intensity Approach Light System
HIRL High Intensity Runway Edge Lights
HIWAS Hazardous Inflight Weather Advisory Service
HJ Sunrise to Sunset
HN Sunset to Sunrise
HO By Operational Requirements
hPa Hectopascal (one hectopascal = one millibar)
HR Hours (period of time)
HS During Hours of Scheduled Operations
HST High Speed Taxi-way Turn-off
Hz Hertz (cycles per second)
I
I Island
IAF Initial Approach Fix
IAS Indicated Airspeed
IBN Identification Beacon
ICAO International Civil Aviation Organization
IDENT Identification
IF Intermediate Fix
IFR Instrument Flight Rules
IGS Instrument Guidance System
ILS Instrument Landing System
lM Inner Marker
lMC Instrument Meteorological Conditions
IMTA Intensive Military Training Area
INDEFLY Indefinitely
IN or INS Inches
INFO Information
INOP Inoperative
INS Inertial Navigation System
INT Intersection
INTL International
IORRA Indian Ocean Random RNAV Area Instrument Restricted Controlled Airspace
IR Instrument Restricted Controlled Airspace
IS Islands
ITWS Integrated Terminal weather system
I/V Instrument/Visual Controlled Airspace
J
JAA Joint Aviation Authorities
K
KGS Kilograms
kHz Kilohertz
KIAS Knots Indicated Airspeed
KM Kilometers
KMH Kilometer(s) per Hour
KT Knots
KTAS Knots True Airspeed
L
L Locator (Compass)
LAA Local Airport Advisory
LACFT Large Aircraft
LAHSO Land and Hold Short Operations
LAT Latitude
LBCM Locator Back Course Marker
LBM Locator Back Marker
LBS Pounds (Weight)
LCG Load Classification Group
LCN Load Classification Number
Lctr Locator (Compass)
LDA Landing Distance Available
LDA Localizer type Directional Aid
LDI Landing Direction Indicator
LDIN Lead-in Light System
LGTH Length
LIM Locator Inner Marker
LLWAS Low Level Wind Shear Alert System
LMM Locator Middle Marker
LNDG Landing
LO Locator at Outer Marker Site
LOC Localizer
LOM Locator Outer Marker
LONG Longitude
LSALT Lowest Safe Altitude
LT Local Time
LTS Lights
LVP Low Visibility Procedures
M
M Meters
MAA Maximum Authorized Altitude
MAG Magnetic
MALS Medium Intensity Approach Light System
MALSF Medium Intensity Approach Light System with Sequenced Flashing Lights
MALSR Medium Intensity Approach Light System with Runway Alignment Indicator Lights
MAP Missed Approach Point
MAX Maximum
MB Millibars
MBZ Mandatory Broadcast Zone
MCA Minimum Crossing Altitude
MCAF Marine Corps Air Facility
MCAS Marine Corps Air Station
MCTA Military Controlled Airspace
MDA Minimum Descent Altitude
MDA (H) Minimum Descent Altitude (Height)
MDT Mountain Daylight Time
MEA Minimum Enroute Altitude
MEHT Minimum Eye Height Over Threshold
MEML Memorial
MET Meteorological
MF Medium Frequency (300-3000 kHz) also Mandatory Frequency
MHA Minimum Holding Altitude
MHz Megahertz
MI Medium Intensity (lights)
MIALS Medium Intensity Approach Light System
MIL Military
MIM Minimum
MIN Minute
MIRL Medium Intensity Runway Edge Lights
MKR Marker Radio Beacon
MLS Microwave Landing System
MM Middle Marker
MNPS Minimum Navigation Performance Specifications
MOA Military Operation Area
MOCA Minimum Obstruction Clearance Altitude
MORA Minimum Off-Route Altitude (Grid or Route)
MRA Minimum Reception Altitude
MSA Minimum Safe Altitude
MSL Mean Sea Level
MST Mountain Standard Time
MTA Military Training Area
MTAF Mandatory Traffic Advisory Frequency
MTCA Minimum Terrain Clearance Altitude
MTMA Military Terminal Control Area
MTOW Maximum Take-off Weight
MUN Municipal
MVA Minimum Vectoring Altitude
N
N Night, North or Northern
NA Not Authorized
NAAS Naval Auxiliary Air Station
NADC Naval Air Development Center
NAEC Naval Air Engineering Center
NAF Naval Air Facility
NALF Naval Auxiliary Landing Field
NAR North American Routes
NAS Naval Air Station
NAT North Atlantic Traffic
NAT/OTS North Atlantic Traffic/Organized Track System
NATL National
NAVAID Navigational Aid
NCA Northern Control Area
NCRP Non-Compulsory Reporting Point
NDB Non-Directional Beacon/ Radio Beacon
NE Northeast
NM Nautical Mile(s)
No Number
NoPT No Procedure Turn
NOTAM Notices to Airmen
NW Northwest
NWC Naval Weapons Center
O
O/A On or About
OAC Oceanic Area Control
OCA Oceanic Control Area
OCA (H) Obstacle Clearance Altitude (Height)
OCL Obstruction Clearance Limit
OCNL Occasional
OCTA Oceanic Control Area
ODALS Omni-Directional Approach Light System
OM Outer Marker
OPS Operations or Operates
O/R On Request
O/T Other Times
OTR Oceanic Transition Route
OTS Out-of-Service
P
PANS-OPS Procedures for Air Navigation Services - Aircraft Operations
PAPI Precision Approach Path Indicator
PAR Precision Approach Radar
PCL Pilot Controlled Lighting
PCN Pavement Classification Number
PCZ Positive Control Zone
PDC Pre-Departure Clearance
PDT Pacific Daylight Time
PERM Permanent
PISTON Piston Aircraft
PLASI Pulsating Visual Approach Slope Indicator
PPO Prior Permission Only
PPR Prior Permission Required
PRA Precision Radar Approach
PRM Precision Radar Monitor
PROP Propeller Aircraft
PSP Pierced Steel Planking
PST Pacific Standard Time
PVT Private Operator
Q
QDM Magnetic bearing to facility
QDR Magnetic bearing from facility
QFE Height above airport elevation (or runway threshold elevation) based on local station pressure
QNE Altimeter setting 29.92" Hg or 1013.2 Mb.
QNH Altitude above sea level based on local station pressure
R
RA Radio Altimeter
RAI Runway Alignment Indicator
RAIL Runway Alignment Indicator Lights
RAPCON Radar Approach Control
RCAG Remote Communications Air Ground
RCC Rescue Coordination Center
RCL Runway Centerline
RCLM Runway Center Line Markings
RCO Remote Communications Outlet
REF Reference
REIL Runway End Identifier Lights
REP Reporting Point
REP Ramp Entrance Point
RL Runway (edge) Lights
RNAV Area Navigation
RNP Required Navigation Performance
RNPC Required Navigation Performance Capability
ROC Rate of Climb
RPT Regular Public Transport
RTE Route
RTS Return to Service
RVR Runway Visual Range
RVSM Reduced Vertical Separation Minimum
RVV Runway Visibility Values
RWY Runway
S
S South or Southern
SALS Short Approach Light System
SALSF Short Approach Light System with Sequenced Flashing Lights
SAR Search and Rescue
SATCPM Satellite voice air-ground calling
SAWRS Supplementary Aviation Weather Reporting Station
SCA Southern Control Area
SCOB Scattered Clouds or Better
SDF Simplified Directional Facility
SE Southeast
SEC Seconds
SELCAL Selective Call System
SFL Sequenced Flashing Lights
SFL-V Sequenced Flashing Light(s) - Variable light intensity
SID Standard Instrument Departure
SIWL Single Isolated Wheel Load
SKD Scheduled
SLP Speed Limiting Point
SM Statute Miles
SMGCS Surface Movement Guidance and Control System
SOC Start of Climb
SODALS Simplified Omnidirectional Approach Lighting System
SPAR French Light Precision Approach Radar
SRA Special Rules Area
SRA Surveillance Radar Approach
SRE Surveillance Radar Element
SR-SS Sunrise-Sunset
SSALF Simplified Short Approach Light System with Sequenced Flashing Lights
SSALR Simplified Short Approach Light System with Runway Alignment Indicator Lights
SSALS Simplified Short Approach Light System
SSB Single Sideband
SSR Secondary Surveillance Radar (in U.S.A. ATCRBS)
STAR Standard Terminal Arrival
STD Indication of an altimeter set to 29.92" Hg or 1013.2 Mb without temperature correction
Std Standard
ST-IN Straight-in
STN Station
STOL Short Take-off and Landing
SW Single Wheel Landing Gear
SW Southwest
T
°T True (degrees)
T Terrain clearance altitude -(MOCA)
T Transmits only (radio frequencies)
T-VASI Tee Visual Approach Slope Indicator
TA Transition Altitude
TAA Terminal Arrival Area
TACAN Tactical Air Navigation (bearing and distance station)
TAS True Air Speed
TCAS Traffic Alert and Collision Avoidance System
TCH Threshold Crossing Height
TCTA Transcontinental Control Area
TDWR Terminal Doppler Weather Radar
TDZ Touchdown Zone
TDZE Touchdown Zone Elevation
TEMP Temporary
TERPs United States Standard for Terminal Instrument Procedure
THR Threshold
TIBA Traffic Information Broadcast by Aircraft
TL Transition Level
TMA Terminal Control Area
TML Terminal
TMN Terminates
TODA Take-off Distance Available
TORA Take-off Run Available
TRACON Terminal Radar Approach Control
TRANS ALT Transition Altitude
TRANS LEV Transition Level
TRCV Tri-Color Visual Approach Slope Indicator
TVOR Terminal VOR
TWEB Transcribed Weather Broadcast
TWIP Terminal Weather Information for Pilots
TWR Tower (Aerodrome Control)
TWY Taxiway
U
U Unspecified
U UNICOM
UFN Until Further Notice
UHF Ultra High Frequency (300-3000 MHz)
UIR Upper Flight Information Region
UNCT'L Uncontrolled
UNICOM Aeronautical Advisory Service
UNL Unlimited
U/S Unserviceable
USAF US-Air Force
USB Upper Sideband
USN US-Navy
UTA Upper Control Area
UTC Coordinated Universal Time
V
VAR Magnetic Variation
VASI Visual Approach Slope Indicator
VDP Visual Descent Point
VE Visual Exempted
VFR Visual Flight Rules
VGSI Visual Glide Slope Indicator
VHA Volcanic Hazard Area
VHF Very High Frequency (30-300 MHz)
VIS Visibility
VMC Visual Meteorological Conditions
VNAP Vertical Noise Abatement Procedures
VNAV Vertical Navigation
VOLMET Meteorological Information for Aircraft Flight
VOR VHF Omnidirectional Range
VORTAC VOR and TACAN co-located
VOT Radiated Test Signal VOR
VV Vertical Visibility
V/V Vertical Velocity or speed
W
W West or Western
W/o Without
W/P Area Navigation (RNAV) Way Point
WT Water Tank
WX Weather
X
X On Request
Y
(NO ENTRIES)
Z
Z Zulu Time
Z Coordinated Universal Time (UTC) :confused:
A
A/A Air to Air
AAF Army Air Field
AAL Above Aerodrome Level
AAS Airport Advisory Service
AB Air Base
ABM Abeam
ABN Aerodrome Beacon
AC Air Carrier
ACA Arctic Control Area
ACA Approach Control Area
ACAS Airborne Collision Avoidance System
ACARS Airborne Communications Addressing and Reporting System
ACC Area Control Center
ACFT Aircraft
ACN Aircraft Classification Number
AD Aerodrome
ADA Advisory Area
ADF Automatic Direction Finding
ADIZ Air Defense Identification Zone
ADR Advisory Route
ADV Advisory Area
AEIS Aeronautical Enroute Information Service
AER Approach End Runway
AERADIO Air Radio
AERO Aerodrome
AF Aux Air Force Auxiliary Field
AFB Air Force Base
AFIS Aerodrome Flight Information Service
AFN American Forces Network
AFRS Armed Forces Radio Stations
AFS Air Force Station
AFSS Automated Flight Service Station
A/G Air-to-Ground
AGL Above Ground Level
AGNIS Azimuth Guidance Nose-in-Stand
AH Alert Height
AHP Army Heliport
AIRAC Aeronautical Information Regulation and Control
AIREP Air-Report
ALA Authorized Landing Area
ALF Auxiliary Landing Field
ALT Altitude
ALTN Alternate
AMA Area Minimum Altitude
AMSL Above Mean Sea Level
ANGB Air National Guard Base
AOE Airport/Aerodrome of Entry
AOR Area of Responsibility
APAPI Abbreviated Precision Approach Path Indicator
APC Area Positive Control
APCH Approach
APP Approach Control
APT Airport
ARB Air Reserve Base
ARINC Aeronautical Radio, Inc.
ARO ATS Reporting Office
ARR Arrival
ARTCC Air Route Traffic Control Center
ASDA Accelerate Stop Distance Available
ASOS Automated Surface Observation System
ASR Airport Surveillance Radar
ATA Actual Time of Arrival
ATCAA Air Traffic Control Assigned Airspace
ATCC Air Traffic Control Center
ATCT Air Traffic Control Tower
ATD Actual Time of Departure
ATF Aerodrome Traffic Frequency
ATFM Air Traffic Flow Management
ATIS Automatic Terminal Information Service
ATS Air Traffic Services
ATZ Aerodrome Traffic Zone
AUTH Authorized
AUW All-up Weight
AUX Auxiliary
AVBL Available
AWIB Aerodrome Weather Information Broadcast
AWOS Automated Weather Observing System
AWY Airway
B
BC Back Course
BCM Back Course Marker
BCN Beacon
BCOB Broken Clouds or Better
BCST Broadcast
BDRY Boundary
BLDG Building
BM Back Marker
BRG Bearing
B-RNAV Basic RNAV
BS Broadcast Station (Commercial)
C
C ATC IFR Flight Plan Clearance Delivery Frequency
CADIZ Canadian Air Defense Identification Zcne
CARS Community Aerodrome Radio Station
CAT Category
CDI Course Deviation Indicator
CDR Conditional Route
CDT Central Daylight Time
CEIL Ceiling
CERAP Combined Center/Radar Approach Control
CGAS Coast Guard Air Station
CGL Circling Guidance Lights
CH Channel
CH Critical Height
CMNPS Canadian Minimum Navigation Performance Specification
CNF Computer Navigation Fix
CO County
COMLO Compass Locator
COMM Communications
CONT Continuous
COORD Coordinates
COP Change Over Point
CORR Corridor
CP Command Post
Cpt Clearance (Pre-Taxi Procedure)
CRS Course
CST Central Standard Time
CTA Control Area
CTAF Common Traffic Advisory Frequency
CTL Control
CTR Control Zone
CVFR Controlled VFR
D
D Day
DA Decision Altitude
DA (H) Decision Altitude (Height)
D-ATIS Digital ATIS
DCT Direct
DECMSND Decommissioned
DEG Degree
DEP Departure Control
DEPARTURE Departure Procedure
DER Departure End of Runway
DEWIZ Distance Early Warning Identification Zone
DISPL THRESH Displaced Threshold
DIST Distance
DME Distance Measuring Equipment
DOD Department of Defense
DOM Domestic
DP Departure Procedure
E
E East or Eastern
EAT Expected Approach Time
ECOMS Jeppesen Explanation of Common Minimum Specifications
EDT Eastern Daylight Time
EET Estimated Elapsed Time
EFAS Enroute Flight Advisory Service
EFF Effective
ELEV Elevation
EMERG Emergency
ENG Engine
EOBT Estimated Off Block Time
EST Eastern Standard Time
ETA Estimated Time of Arrival
ETD Estimated Time of Departure
ETE Estimated Time Enroute
ETOPS Extended Range Operation with two engine airplanes
F
FAA Federal Aviation Administration
FAF Final Approach Fix
FAP Final Approach Point
FAR Federal Aviation Regulation
FCP Final Control Point
FIC Flight Information Center
FIR Flight Information Region
FIS Flight Information Service
FL Flight Level (Altitude)
FLD Field
FLG Flashing
FLT Flight
FM Fan Marker
FMS Flight Management System
FPM Feet Per Minute
FREQ Frequency
FSS Flight Service Station
FT Feet
FTS Flexible Track System
G
G Guards only (radio frequencies)
GA General Aviation
GCA Ground Controlled Approach (radar)
GCO Ground Communications Outlet
GEO Geographic or True
GLONASS Global Orbiting Navigation Satellite System
GMT Greenwich Mean Time
GND Ground Control
GND Surface of the Earth (either land or water)
GNSS Global Navigation Satellite System
GP Glidepath
GPS Global Positioning System
GS Glide Slope
G/S Ground Speed
GWT Gross Weight
H
H Non-directional Radio Beacon or High Altitude
H24 24 Hour Service
HAA Height Above Airport
HAS Height Above Site
HAT Height Above Touchdown
HC Critical Height
HDG Heading
HF High Frequency (3-30 MHz)
HI High (altitude)
HI High Intensity (lights)
HIALS High Intensity Approach Light System
HIRL High Intensity Runway Edge Lights
HIWAS Hazardous Inflight Weather Advisory Service
HJ Sunrise to Sunset
HN Sunset to Sunrise
HO By Operational Requirements
hPa Hectopascal (one hectopascal = one millibar)
HR Hours (period of time)
HS During Hours of Scheduled Operations
HST High Speed Taxi-way Turn-off
Hz Hertz (cycles per second)
I
I Island
IAF Initial Approach Fix
IAS Indicated Airspeed
IBN Identification Beacon
ICAO International Civil Aviation Organization
IDENT Identification
IF Intermediate Fix
IFR Instrument Flight Rules
IGS Instrument Guidance System
ILS Instrument Landing System
lM Inner Marker
lMC Instrument Meteorological Conditions
IMTA Intensive Military Training Area
INDEFLY Indefinitely
IN or INS Inches
INFO Information
INOP Inoperative
INS Inertial Navigation System
INT Intersection
INTL International
IORRA Indian Ocean Random RNAV Area Instrument Restricted Controlled Airspace
IR Instrument Restricted Controlled Airspace
IS Islands
ITWS Integrated Terminal weather system
I/V Instrument/Visual Controlled Airspace
J
JAA Joint Aviation Authorities
K
KGS Kilograms
kHz Kilohertz
KIAS Knots Indicated Airspeed
KM Kilometers
KMH Kilometer(s) per Hour
KT Knots
KTAS Knots True Airspeed
L
L Locator (Compass)
LAA Local Airport Advisory
LACFT Large Aircraft
LAHSO Land and Hold Short Operations
LAT Latitude
LBCM Locator Back Course Marker
LBM Locator Back Marker
LBS Pounds (Weight)
LCG Load Classification Group
LCN Load Classification Number
Lctr Locator (Compass)
LDA Landing Distance Available
LDA Localizer type Directional Aid
LDI Landing Direction Indicator
LDIN Lead-in Light System
LGTH Length
LIM Locator Inner Marker
LLWAS Low Level Wind Shear Alert System
LMM Locator Middle Marker
LNDG Landing
LO Locator at Outer Marker Site
LOC Localizer
LOM Locator Outer Marker
LONG Longitude
LSALT Lowest Safe Altitude
LT Local Time
LTS Lights
LVP Low Visibility Procedures
M
M Meters
MAA Maximum Authorized Altitude
MAG Magnetic
MALS Medium Intensity Approach Light System
MALSF Medium Intensity Approach Light System with Sequenced Flashing Lights
MALSR Medium Intensity Approach Light System with Runway Alignment Indicator Lights
MAP Missed Approach Point
MAX Maximum
MB Millibars
MBZ Mandatory Broadcast Zone
MCA Minimum Crossing Altitude
MCAF Marine Corps Air Facility
MCAS Marine Corps Air Station
MCTA Military Controlled Airspace
MDA Minimum Descent Altitude
MDA (H) Minimum Descent Altitude (Height)
MDT Mountain Daylight Time
MEA Minimum Enroute Altitude
MEHT Minimum Eye Height Over Threshold
MEML Memorial
MET Meteorological
MF Medium Frequency (300-3000 kHz) also Mandatory Frequency
MHA Minimum Holding Altitude
MHz Megahertz
MI Medium Intensity (lights)
MIALS Medium Intensity Approach Light System
MIL Military
MIM Minimum
MIN Minute
MIRL Medium Intensity Runway Edge Lights
MKR Marker Radio Beacon
MLS Microwave Landing System
MM Middle Marker
MNPS Minimum Navigation Performance Specifications
MOA Military Operation Area
MOCA Minimum Obstruction Clearance Altitude
MORA Minimum Off-Route Altitude (Grid or Route)
MRA Minimum Reception Altitude
MSA Minimum Safe Altitude
MSL Mean Sea Level
MST Mountain Standard Time
MTA Military Training Area
MTAF Mandatory Traffic Advisory Frequency
MTCA Minimum Terrain Clearance Altitude
MTMA Military Terminal Control Area
MTOW Maximum Take-off Weight
MUN Municipal
MVA Minimum Vectoring Altitude
N
N Night, North or Northern
NA Not Authorized
NAAS Naval Auxiliary Air Station
NADC Naval Air Development Center
NAEC Naval Air Engineering Center
NAF Naval Air Facility
NALF Naval Auxiliary Landing Field
NAR North American Routes
NAS Naval Air Station
NAT North Atlantic Traffic
NAT/OTS North Atlantic Traffic/Organized Track System
NATL National
NAVAID Navigational Aid
NCA Northern Control Area
NCRP Non-Compulsory Reporting Point
NDB Non-Directional Beacon/ Radio Beacon
NE Northeast
NM Nautical Mile(s)
No Number
NoPT No Procedure Turn
NOTAM Notices to Airmen
NW Northwest
NWC Naval Weapons Center
O
O/A On or About
OAC Oceanic Area Control
OCA Oceanic Control Area
OCA (H) Obstacle Clearance Altitude (Height)
OCL Obstruction Clearance Limit
OCNL Occasional
OCTA Oceanic Control Area
ODALS Omni-Directional Approach Light System
OM Outer Marker
OPS Operations or Operates
O/R On Request
O/T Other Times
OTR Oceanic Transition Route
OTS Out-of-Service
P
PANS-OPS Procedures for Air Navigation Services - Aircraft Operations
PAPI Precision Approach Path Indicator
PAR Precision Approach Radar
PCL Pilot Controlled Lighting
PCN Pavement Classification Number
PCZ Positive Control Zone
PDC Pre-Departure Clearance
PDT Pacific Daylight Time
PERM Permanent
PISTON Piston Aircraft
PLASI Pulsating Visual Approach Slope Indicator
PPO Prior Permission Only
PPR Prior Permission Required
PRA Precision Radar Approach
PRM Precision Radar Monitor
PROP Propeller Aircraft
PSP Pierced Steel Planking
PST Pacific Standard Time
PVT Private Operator
Q
QDM Magnetic bearing to facility
QDR Magnetic bearing from facility
QFE Height above airport elevation (or runway threshold elevation) based on local station pressure
QNE Altimeter setting 29.92" Hg or 1013.2 Mb.
QNH Altitude above sea level based on local station pressure
R
RA Radio Altimeter
RAI Runway Alignment Indicator
RAIL Runway Alignment Indicator Lights
RAPCON Radar Approach Control
RCAG Remote Communications Air Ground
RCC Rescue Coordination Center
RCL Runway Centerline
RCLM Runway Center Line Markings
RCO Remote Communications Outlet
REF Reference
REIL Runway End Identifier Lights
REP Reporting Point
REP Ramp Entrance Point
RL Runway (edge) Lights
RNAV Area Navigation
RNP Required Navigation Performance
RNPC Required Navigation Performance Capability
ROC Rate of Climb
RPT Regular Public Transport
RTE Route
RTS Return to Service
RVR Runway Visual Range
RVSM Reduced Vertical Separation Minimum
RVV Runway Visibility Values
RWY Runway
S
S South or Southern
SALS Short Approach Light System
SALSF Short Approach Light System with Sequenced Flashing Lights
SAR Search and Rescue
SATCPM Satellite voice air-ground calling
SAWRS Supplementary Aviation Weather Reporting Station
SCA Southern Control Area
SCOB Scattered Clouds or Better
SDF Simplified Directional Facility
SE Southeast
SEC Seconds
SELCAL Selective Call System
SFL Sequenced Flashing Lights
SFL-V Sequenced Flashing Light(s) - Variable light intensity
SID Standard Instrument Departure
SIWL Single Isolated Wheel Load
SKD Scheduled
SLP Speed Limiting Point
SM Statute Miles
SMGCS Surface Movement Guidance and Control System
SOC Start of Climb
SODALS Simplified Omnidirectional Approach Lighting System
SPAR French Light Precision Approach Radar
SRA Special Rules Area
SRA Surveillance Radar Approach
SRE Surveillance Radar Element
SR-SS Sunrise-Sunset
SSALF Simplified Short Approach Light System with Sequenced Flashing Lights
SSALR Simplified Short Approach Light System with Runway Alignment Indicator Lights
SSALS Simplified Short Approach Light System
SSB Single Sideband
SSR Secondary Surveillance Radar (in U.S.A. ATCRBS)
STAR Standard Terminal Arrival
STD Indication of an altimeter set to 29.92" Hg or 1013.2 Mb without temperature correction
Std Standard
ST-IN Straight-in
STN Station
STOL Short Take-off and Landing
SW Single Wheel Landing Gear
SW Southwest
T
°T True (degrees)
T Terrain clearance altitude -(MOCA)
T Transmits only (radio frequencies)
T-VASI Tee Visual Approach Slope Indicator
TA Transition Altitude
TAA Terminal Arrival Area
TACAN Tactical Air Navigation (bearing and distance station)
TAS True Air Speed
TCAS Traffic Alert and Collision Avoidance System
TCH Threshold Crossing Height
TCTA Transcontinental Control Area
TDWR Terminal Doppler Weather Radar
TDZ Touchdown Zone
TDZE Touchdown Zone Elevation
TEMP Temporary
TERPs United States Standard for Terminal Instrument Procedure
THR Threshold
TIBA Traffic Information Broadcast by Aircraft
TL Transition Level
TMA Terminal Control Area
TML Terminal
TMN Terminates
TODA Take-off Distance Available
TORA Take-off Run Available
TRACON Terminal Radar Approach Control
TRANS ALT Transition Altitude
TRANS LEV Transition Level
TRCV Tri-Color Visual Approach Slope Indicator
TVOR Terminal VOR
TWEB Transcribed Weather Broadcast
TWIP Terminal Weather Information for Pilots
TWR Tower (Aerodrome Control)
TWY Taxiway
U
U Unspecified
U UNICOM
UFN Until Further Notice
UHF Ultra High Frequency (300-3000 MHz)
UIR Upper Flight Information Region
UNCT'L Uncontrolled
UNICOM Aeronautical Advisory Service
UNL Unlimited
U/S Unserviceable
USAF US-Air Force
USB Upper Sideband
USN US-Navy
UTA Upper Control Area
UTC Coordinated Universal Time
V
VAR Magnetic Variation
VASI Visual Approach Slope Indicator
VDP Visual Descent Point
VE Visual Exempted
VFR Visual Flight Rules
VGSI Visual Glide Slope Indicator
VHA Volcanic Hazard Area
VHF Very High Frequency (30-300 MHz)
VIS Visibility
VMC Visual Meteorological Conditions
VNAP Vertical Noise Abatement Procedures
VNAV Vertical Navigation
VOLMET Meteorological Information for Aircraft Flight
VOR VHF Omnidirectional Range
VORTAC VOR and TACAN co-located
VOT Radiated Test Signal VOR
VV Vertical Visibility
V/V Vertical Velocity or speed
W
W West or Western
W/o Without
W/P Area Navigation (RNAV) Way Point
WT Water Tank
WX Weather
X
X On Request
Y
(NO ENTRIES)
Z
Z Zulu Time
Z Coordinated Universal Time (UTC) :confused: