This page is provided to interpret the contents of coded international NOTAMs, the code group found in NOTAMs is made up of 5 letters, the first is a Q and indicates what follows are abbreviations, the second and thord letters identify the subject being reported, and the fourth and fifth letters identify the status of operation. The two abbreviations are categorised by the first letter and are grouped as follows:

Categories based on Second Letter

ATM Airspace Organisation
CNS Communications and Surveillance Facilities
AGA Facilities and Services
CNS GNSS Services
CNS Instrument and Microwave Landing System
AGA Lighting Facilites
AGA Movement and Landing Areas
COM Terminal and En Route Navigation Facilities
Other Information
ATM Air Traffic Procedures
Navigation Warnings: Airspace Restrictions
ATM Air Traffic and VOLMET Services
Navigation Warnings: Warnings

Categories based on Fourth Letter

Hazard Conditions

Q Code Letters 2 and 3

???? - Any
AAAA - Minimum altitude
ACAC - Class B, C, D, or E Surface Area
ADAD - Air defense identification zone
AEAE - Control area
AFAF - Flight information region
AHAH - Upper control area
ALAL - Minimum usable flight level
ANAN - Area navigation route
AOAO - Oceanic control area
APAP - Reporting point
ARAR - ATS route
ATAT - Terminal control area
AUAU - Upper flight information region
AVAV - Upper advisory area
AXAX - Significant point
AZAZ - Aerodrome traffic zone
CACA - Air/ground facility
CBCB - Automatic dependent surveillance - broadcast
CCCC - Automatic dependent surveillance - contract
CDCD - Controller pilot data link communications
CECE - En route surveillance radar
CGCG - Ground controlled approach system (GCA)
CLCL - Selective calling system (SELCAL)
CMCM - Surface movement radar
CPCP - Precision approach radar (PAR)
CRCR - Surveillance radar element of precision approach radar system
CSCS - Secondary surveillance radar (SSR)
CTCT - Terminal area surveillance radar (TAR)
FAFA - Aerodrome
FBFB - Friction measuring device
FCFC - Ceiling measurement equipment
FDFD - Docking system
FEFE - Oxygen
FFFF - Fire fighting and rescue
FGFG - Ground movement control
FHFH - Helicopter alighting area/platform
FIFI - Aircraft de-icing
FJFJ - Oils
FLFL - Landing direction indicator
FMFM - Meteorological service
FOFO - Fog dispersal system
FPFP - Heliport
FSFS - Snow removal equipment
FTFT - Transmissometer
FUFU - Fuel availability
FWFW - Wind direction indicator
FZFZ - Customs/immigration
GAGA - GNSS airfield specific operations
GWGW - GNSS area wide operations
ICIC - Instrument landing system
IDID - DME associated with ILS
IGIG - Glide path (ILS)
IIII - Inner marker (ILS)
ILIL - Localizer (ILS)
IMIM - Middle marker (ILS)
ININ - Localizer
IOIO - Outer marker (ILS)
ISIS - ILS Category I
ITIT - ILS Category II
IUIU - ILS Category III
IWIW - Microwave landing system (MLS)
IXIX - Locator outer (ILS)
IYIY - Locator middle (ILS)
LALA - Approach lighting system
LBLB - Aerodrome beacon
LCLC - Runway centre line lights
LDLD - Landing direction indicator lights
LELE - Runway edge lights
LFLF - Sequenced flashing lights
LGLG - Pilot-controlled lighting
LHLH - High intensity runway lights
LILI - Runway end identifier lights
LJLJ - Runway alignment indicator lights
LKLK - Category II components of approach lighting system
LLLL - Low intensity runway lights
LMLM - Medium intensity runway lights
LPLP - Precision approach path indicator
LRLR - All landing area lighting facilities
LSLS - Stopway lights
LTLT - Threshold lights
LULU - Helicopter approach path indicator
LVLV - Visual approach slope indicator system
LWLW - Heliport lighting
LXLX - Taxiway centre line lights
LYLY - Taxiway edge lights
LZLZ - Runway touchdown zone lights
MAMA - Movement area
MBMB - Bearing strength
MCMC - Clearway
MDMD - Declared distances
MGMG - Taxiing guidance system
MHMH - Runway arresting gear
MKMK - Parking area
MMMM - Daylight markings
MNMN - Apron
MOMO - Stop bar
MPMP - Aircraft stands
MRMR - Runway
MSMS - Stopway
MTMT - Threshold
MUMU - Runway turning bay
MWMW - Strip/shoulder
MXMX - Taxiway(s)
MYMY - Rapid exit taxiway
NANA - All radio navigation facilities
NBNB - Nondirectional radio beacon
NDND - Distance measuring equipment (DME)
NFNF - Fan marker
NLNL - Locator
NXNX - Direction-finding station
OAOA - Aeronautical information service
OBOB - Obstacle
OEOE - Aircraft entry requirements
OLOL - Obstacle lights on ...
OROR - Rescue coordination centre
PAPA - Standard instrument arrival
PBPB - Standard VFR arrival
PCPC - Contingency procedures
PDPD - Standard instrument departure
PEPE - Standard VFR departure
PFPF - Flow control procedure
PHPH - Holding procedure
PIPI - Instrument approach procedure
PKPK - VFR approach procedure
PLPL - Flight plan processing
PMPM - Aerodrome operating minima
PNPN - Noise operating restriction
POPO - Obstacle clearance altitude and height
PRPR - Radio failure procedure
PTPT - Transition altitude or transition level
PUPU - Missed approach procedure
PXPX - Minimum holding altitude
PZPZ - ADIZ procedure
RARA - Airspace reservation
RDRD - Danger area
RMRM - Military operating area
RORO - Overflying of ...
RPRP - Prohibited area
RRRR - Restricted area
RTRT - Temporary restricted area
SASA - Automatic terminal information service
SBSB - ATS reporting office
SCSC - Area control centre
SESE - Flight information service
SFSF - Aerodrome flight information service
SLSL - Flow control centre
SOSO - Oceanic area control centre
SPSP - Approach control service
SSSS - Flight service station
STST - Aerodrome control tower
SUSU - Upper area control centre
SVSV - VOLMET broadcast
SYSY - Upper advisory service
WAWA - Air display
WBWB - Aerobatics
WCWC - Captive balloon or kite
WDWD - Demolition of explosives
WEWE - Exercises
WFWF - Air refueling
WGWG - Glider flying
WHWH - Blasting
WJWJ - Banner/target towing
WLWL - Ascent of free balloon
WMWM - Missile, gun or rocket firing
WPWP - Parachute jumping exercise, paragliding, or hang gliding
WRWR - Radioactive materials or toxic chemicals
WSWS - Burning or blowing gas
WTWT - Mass movement of aircraft
WUWU - Unmanned aircraft
WVWV - Formation flight
WWWW - Significant volcanic activity
WYWY - Aerial survey
WZWZ - Model flying

Q Code Letters 4 and 5

???? - Any
ACAC - Withdrawn for maintenance
ADAD - Available for daylight operation
AFAF - Flight checked and found reliable
AGAG - Operating but ground checked only, awaiting flight check
AHAH - Hours of service are now
AKAK - Resumed normal operations
ALAL - Operative (or reoperative) subject to previously published limitations/conditions
AMAM - Military operations only
ANAN - Available for night operation
AOAO - Operational
APAP - Available, prior permission required
ARAR - Available on request
ASAS - Unserviceable
AUAU - Not available
AWAW - Completely withdrawn
AXAX - Previously promulgated shutdown has been canceled
CACA - Activated
CCCC - Completed
CDCD - Deactivated
CECE - Erected
CFCF - Operating frequency(ies) changed to
CGCG - Downgraded to
CHCH - Changed
CICI - Identification or radio call sign changed to
CLCL - Realigned
CMCM - Displaced
CNCN - Canceled
COCO - Operating
CPCP - Operating on reduced power
CRCR - Temporarily replaced by
CSCS - Installed
CTCT - On test, do not use
HAHA - Braking action is ...
HBHB - Friction coefficient is
HCHC - Covered by compacted snow to depth of
HDHD - Covered by dry snow to a depth of
HEHE - Covered by water to a depth of
HFHF - Totally free of snow and ice
HGHG - Grass cutting in progress
HHHH - Hazard due to
HIHI - Covered by ice
HJHJ - Launch planned
HKHK - Bird migration in progress
HLHL - Snow clearance completed
HMHM - Marked by
HNHN - Covered by wet snow or slush to a depth of
HOHO - Obscured by snow
HPHP - Snow clearance in progress
HQHQ - Operation canceled
HRHR - Standing water
HSHS - Sanding in progress
HTHT - Approach according to signal area only
HUHU - Launch in progress
HVHV - Work completed
HWHW - Work in progress
HXHX - Concentration of birds
HYHY - Snow banks exist
HZHZ - Covered by frozen ruts and ridges
LALA - Operating on auxiliary power supply
LBLB - Reserved for aircraft based therein
LCLC - Closed
LDLD - Unsafe
LELE - Operating without auxiliary power supply
LFLF - Interference from
LGLG - Operating without identification
LHLH - Unserviceable for aircraft heavier than
LILI - Closed to IFR operations
LKLK - Operating as a fixed light
LLLL - Usable for length of...and width of...
LNLN - Closed to all night operations
LPLP - Prohibited to
LRLR - Aircraft restricted to runways and taxiways
LSLS - Subject to interruption
LTLT - Limited to
LVLV - Closed to VFR operations
LWLW - Will take place
LXLX - Operating but caution advised due to
XXXX - Where 4th and 5th letter Code does not cover the situation, use XX and supplement by plain language

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