| Airspace Organization (A) | |
|---|---|
| AA | MINIMUM ALTITUDE |
| AC | CLASS B, C, D OR E SURFACE AREA (ICAO-CONTROL ZONE) |
| AD | ADIZ |
| AE | CONTROL AREA |
| AF | FLIGHT INFORMATION REGION (FIR) |
| AG | GENERAL FACILITY |
| AH | UPPER CONTROL AREA |
| AL | MINIMUM USABLE FLIGHT LEVEL |
| AN | AIR NAVIGATION ROUTE |
| AO | OCEANIC CONTROL ZONE (OCA) |
| AP | REPORTING POINT |
| AR | ATS ROUTE |
| AT | TERMINAL CONTROL AREA (TMA) |
| AU | UPPER FLIGHT INFORMATION REGION |
| AV | UPPER ADVISORY AREA |
| AX | INTERSECTION |
| AZ | AERODROME TRAFFIC ZONE (ATZ) |
| Communications and Radar (C) | |
|---|---|
| CA | AIR/GROUND FACILITY |
| CB | AUTOMATIC DEPENDENT SURVEILLANCE - BROADCAST |
| CC | AUTOMATIC DEPENDENT SURVEILLANCE - CONTRACT |
| CD | CONTROLLER-PILOT DATA LINK COMMUNICATIONS |
| CE | ENROUTE SURVELLENCE RADAR |
| CG | GROUND CONTROLLED APPROACH SYSTEM (GCA) |
| CL | SELECTIVE CALLING SYSTEM |
| CM | SURFACE MOVEMENT RADAR |
| CP | PAR |
| CR | SURVEILLANCE RADAR ELEMENT OF PAR SYSTEM |
| CS | SECONDARY SURVEILLANCE RADAR |
| CT | TERMINAL AREA SURVEILLANCE RADAR |
| GJ | ASR |
| GK | PRECISION APPROACH LANDING SYSTEM |
| Facilities and Services (F) | |
|---|---|
| FA | AERODROME |
| FB | BRAKING ACTION MEASUREMENT EQUIPMENT |
| FC | CEILING MEASUREMENT EQUIPMENT |
| FD | DOCKING SYSTEM |
| FE | OXYGEN |
| FF | FIRE FIGHTING AND RESCUE |
| FG | GROUND MOVEMENT CONTROL |
| FH | HELICOPTER ALIGHTING AREA/PLATFORM |
| FI | AIRCRAFT DE-ICING |
| FJ | OILS |
| FL | LANDING DIRECTION INDICATOR |
| FM | METEOROLOGICAL SERVICE |
| FO | FOG DISPERSAL SYSTEM |
| FP | HELIPORT |
| FS | SNOW REMOVAL EQUIPMENT |
| FT | TRANSMISSOMETER |
| FU | FUEL AVAILABILITY |
| FW | WIND DIRECTION INDICATOR |
| FZ | CUSTOMS |
| GC | TRANSIENT MAINTENANCE |
| GD | STARTER UNIT |
| GE | SOAP |
| GF | DEMINERALIZED WATER |
| GG | OXYGEN |
| GH | OIL |
| GI | DRAG CHUTES |
| GL | FACSFAC |
| GS | NITROGEN |
| GU | DE-ICE |
| GZ | BASE OPERATIONS |
| Military (G) | |
|---|---|
| GB | OPTICAL LANDING SYSTEM |
| GC | TRANSIENT MAINTENANCE |
| GD | STARTER UNIT |
| GE | SOAP |
| GF | DEMINERALIZED WATER |
| GG | OXYGEN |
| GH | OIL |
| GI | DRAG CHUTES |
| GJ | ASR |
| GK | PRECISION APPROACH LANDING SYSTEM |
| GL | FACSFAC |
| GM | FIRING RANGE |
| GN | NIGHT VISION GOGGLE (NVG) OPERATIONS |
| GO | WARNING AREA |
| GP | ARRESTING GEAR MARKERS (AGM) |
| GQ | PULSATING/STEADY VISUAL APPROACH SLOPE INDICATOR |
| GR | DIVERSE DEPARTURE |
| GS | NITROGEN |
| GT | IFR TAKE-OFF MINIMUMS AND DEPARTURE PROCEDURES |
| GU | DE-ICE |
| GV | CLEAR ZONE |
| GX | RUNWAY DISTANCE REMAINING (RDR) SIGNS |
| GY | HELO PAD |
| GZ | BASE OPERATIONS |
| Instrument and Microwave Landing (I) | |
|---|---|
| IC | ILS |
| ID | DME ASSOCIATED WITH ILS |
| IG | GLIDE PATH (ILS) |
| II | INNER MARKER (ILS) |
| IL | LOCALIZER (ILS) |
| IM | MIDDLE MARKER (ILS) |
| IN | LOCALIZER |
| IO | OUTER MARKER (ILS) |
| IS | ILS CATEGORY I |
| IT | ILS CATEGORY II |
| IU | ILS CATEGORY III |
| IW | MLS |
| IX | LOCATOR, OUTER, (ILS) |
| IY | LOCATOR, MIDDLE (ILS) |
| GM | FIRING RANGE |
| Lighting (L) | |
|---|---|
| LA | APPROACH LIGHTING SYSTEM |
| LB | AERODROME BEACON |
| LC | RUNWAY CENTERLINE LIGHTS |
| LD | LANDING DIRECTION INDICATOR LIGHTS |
| LE | RUNWAY EDGE LIGHTS |
| LF | SEQUENCED FLASHING LIGHTS |
| LG | PILOT-CONTROLLED LIGHTING |
| LH | HIGH INTENSITY RUNWAY LIGHTS |
| LI | RUNWAY END IDENTIFIER LIGHTS |
| LJ | RUNWAY ALIGNMENT INDICATOR LIGHTS |
| LK | CATEGORY II COMPONENTS OF APPROACH LIGHTING SYSTEM |
| LL | LOW INTENSITY RUNWAY LIGHTS |
| LM | MEDIUM INTENSITY RUNWAY LIGHTS |
| LP | PRECISION APPROACH PATH INDICATOR |
| LR | ALL LANDING AREA LIGHTING FACILITIES |
| LS | STOPWAY LIGHTS |
| LT | THRESHOLD LIGHTS |
| LU | HELICOPTER APPROACH PATH INDICATOR |
| LV | VISUAL APRROACH SLOPE INDICATOR |
| LW | HELIPORT LIGHTING |
| LX | TAXIWAY CENTER LINE LIGHTS |
| LY | TAXIWAY EDGE LIGHTS |
| LZ | RUNWAY TOUCH DOWN ZONE LIGHTS |
| GB | OPTICAL LANDING SYSTEM |
| Movement and Landing Area (M) | |
|---|---|
| MA | MOVEMENT AREA |
| MB | BEARING STRENGTH |
| MC | CLEARWAY |
| MD | DECLARED DISTANCES |
| MG | TAXIING GUIDANCE SYSTEM |
| MH | RUNWAY ARRESTING GEAR |
| MK | PARKING AREA |
| MM | DAYLIGHT MARKINGS |
| MN | APRON |
| MO | STOP BAR |
| MP | AIRCRAFT STANDS |
| MR | RUNWAY |
| MS | STOPWAY |
| MT | THRESHOLD |
| MU | RUNWAY TURNING BAY |
| MW | STRIP |
| MX | TAXIWAY |
| MY | RAPID EXIT TAXIWAY |
| Terminal and En-route Navigation (N) | |
|---|---|
| NA | ALL RADIO NAVIGATION FACILITIES |
| NB | NDB |
| NC | DECCA |
| ND | DME |
| NF | FAN MARKER |
| NL | LOCATOR |
| NM | VOR/DME |
| NN | TACAN |
| NT | VORTAC |
| NV | VOR |
| NX | DIRECTION FINDING STATION |
| Other Information (O) | |
|---|---|
| OA | AERONAUTICAL INFORMATION SERVICE |
| OB | OBSTACLE |
| OE | AIRCRAFT ENTRY REQUIREMENTS |
| OL | OBSTACLE LIGHTS |
| OR | RESCUE COORDINATION CENTER |
| Air Traffic Procedures (P) | |
|---|---|
| PA | STANDARD INSTRUMENT ARRIVAL (STAR) |
| PB | STANDARD VFR ARRIVAL |
| PC | CONTINGENCY PROCEDURES |
| PD | STANDARD INSTRUMENT DEPARTURE (SID) |
| PE | STANDARD VFR DEPARTURE |
| PF | FLOW CONTROL PROCEDURES |
| PH | HOLDING PROCEDURES |
| PI | INSTRUMENT APPROACH PROCEDURE |
| PK | VFR APPROACH PROCEDURE |
| PL | OBSTACLE CLEARANCE LIMIT |
| PM | AERODROME OPERATING MINIMA |
| PN | NOISE OPERATING RESTRICTIONS |
| PO | OBSTACLE CLEARANCE ALTITUDE |
| PP | OBSTACLE CLEARANCE HEIGHT |
| PR | RADIO FAILURE PROCEDURE |
| PT | TRANSITION ALTITUDE |
| PU | MISSED APPROACH PROCEDURE |
| PX | MINIMUM HOLDING ALTITUDE |
| PZ | ADIZ PROCEDURE |
| GR | DIVERSE DEPARTURE |
| GT | IFR TAKE-OFF MINIMUMS AND DEPARTURE PROCEDURES |
| Airspace Restrictions (R) | |
|---|---|
| RA | AIRSPACE RESERVATION |
| RD | DANGER AREA |
| RM | |
| RO | OVERFLYING OF |
| RP | PROHIBITED AREA |
| RR | RESTRICTED AREA |
| RT | TEMPORARY RESTRICTED AREA |
| GO | WARNING AREA |
| Air Traffic and VOLMET Services (S) | |
|---|---|
| SA | AUTOMATIC TERMINAL INFORMATION SERVICE (ATIS) |
| SB | ATS REPORT OFFICE |
| SC | AREA CONTROL CENTER |
| SE | FLIGHT INFORMATION SERVICE |
| SF | AERODROME FLIGHT INFORMATION SERVICE (AFIS) |
| SL | FLOW CONTROL CENTER |
| SO | OCEANIC AREA CONTROL CENTER |
| SP | APPROACH CONTROL |
| SS | FLIGHT SERVICE STATION |
| ST | AERODROME CONTROL TOWER |
| SU | UPPER AREA CONTROL CENTER |
| SV | VOLMENT BROADCAST |
| SY | UPPER ADVISORY SERVICE |
| Hazard (T) | |
|---|---|
| TT | MIJI |
| Warnings (W) | |
|---|---|
| WA | AIR DISPLAY |
| WB | AEROBATICS |
| WC | CAPTIVE BALLOON OR KITE |
| WD | DEMOLITION OF EXPLOSIVES |
| WE | EXERCISES |
| WF | AIR REFUELING |
| WG | GLIDER FLYING |
| WH | BLASTING |
| WJ | BANNER/TARGET TOWING |
| WL | ASCENT OF FREE BALLOON |
| WM | MISSLE, GUN OR ROCKET FIRING |
| WP | PARACHUTE JUMPING EXERCISE |
| WR | RADIOACTIVE MATERIALS OR TOXIC CHEMICALS |
| WS | BURNING OR BLOWING GAS |
| WT | MASS MOVEMENT OF ACFT |
| WU | UNMANNED AIRCRAFT |
| WV | FORMATION FLT |
| WW | SIGNIFICANT VOLCANIC ACTIVITY |
| WY | AERIAL SURVEY |
| WZ | MODEL FLYING |
| Other (X) | |
|---|---|
| XX | |