QCODE 2nd & 3rd LETTERS (A) Airspace Organization (C) Communications and Radar (F) Facilities and Services (G) Military (I) Instrument and Microwave Landing (L) Lighting (M) Movement and Landing Area (N) Terminal and En-route Navigation (O) Other Information (P) Air Traffic Procedures (R) Airspace Restrictions (S) Air Traffic and VOLMET Services (T) Hazard (W) Warnings (X) Other 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) Top 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 Top 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 Top Military (G) GA 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 GW GX RUNWAY DISTANCE REMAINING (RDR) SIGNS GY HELO PAD GZ BASE OPERATIONS Top 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) Top 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 Top 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 Top 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 Top Other Information (O) OA AERONAUTICAL INFORMATION SERVICE OB OBSTACLE OE AIRCRAFT ENTRY REQUIREMENTS OL OBSTACLE LIGHTS OR RESCUE COORDINATION CENTER Top 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 Top Airspace Restrictions (R) RA AIRSPACE RESERVATION RD DANGER AREA RM RO OVERFLYING OF RP PROHIBITED AREA RR RESTRICTED AREA RT TEMPORARY RESTRICTED AREA Top 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 Top Hazard (T) TT MIJI Top 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 Top Other (X) XX Top

QCODE 4th & 5th LETTERS (A) Availability (C) Change (G) Military (H) Hazard Conditions (K) (L) Limitations (X) Other Availability (A) AC WITHDRAWN FOR MAINTENANCE AD AVAILABLE FOR DAYLIGHT OPERATIONS AF FLIGHT CHECKED AND FOUND RELIABLE AG OPERATING BUT GROUND CHECKED ONLY, AWAITING FLIGHT CHECK AH HOURS OF SERVICE ARE AK RESUMED NORMAL OPERATIONS AM MILITARY OPERATIONS ONLY AN AVAILABLE FOR NIGHT OPERATIONS AO OPERATIONAL AP PRIOR PERMISSION REQUIRED AQ COMPLETELY WITHDRAWN AR AVAILABLE, PRIOR PERMISSION REQUIRED AS UNSERVICEABLE AU NOT AVAILABLE AW COMPLETELY WITHDRAWN AX PREVIOUSLY PROMULGATED SHUTDOWN HAS BEEN CANCELLED Top Change (C) CA ACTIVATED CC COMPLETED CD DEACTIVATED CE ERECTED CF FREQUENCY CHANGED TO CG DOWNGRADED TO CH CHANGED CI IDENTIFICATION OR RADIO CALL SIGN CHANGED TO CL REALIGNED CM DISPLACED CO OPERATING CP OPERATING ON REDUCED POWER CR TEMPORARILY REPLACED BY CS INSTALLED CT ON TEST, DO NOT USE Top Military (G) GA NOT COINCIDENTAL WITH ILS/PAR GB IN RAISED POSITION GC TAIL HOOK ONLY GD OFFICIAL BUSINESS ONLY GE EXPECT LANDING DELAY GF EXTENSIVE SERVICE DELAY GG UNUSABLE BEYOND GH UNUSABLE GI UNMONITORED GJ IN PROGRESS GK MODERATE GL SEVERE GM NOT ILLUMINATED GN FREQUENCY NOT AVAILABLE GO IS WET GV NOT AUTHORIZED Top Hazard Conditions (H) HA BRAKING ACTION IS HB BRAKING COEFFICIENT IS HC COVERED BY COMPACTED SNOW TO A DEPTH OF HD COVERED BY DRY SNOW TO A DEPTH OF HE COVERED BY WATER TO A DEPTH OF HF TOTALLY FREE OF SNOW AND ICE HG GRASS CUTTING IN PROGRESS HH HAZARD DUE TO HI COVERED BY ICE HJ LAUNCH PLANNED HK MIGRATION IN PROGRESS HL SNOW CLEARANCE COMPLETED HM MARKED BY HN COVERED BY WET SNOW OR SLUSH TO A DEPTH OF HO OBSCURED BY SNOW HP SNOW CLEARANCE IN PROGRESS HQ OPERATIONS CANCELLED HR STANDING WATER HS SANDING HT APPROACH ACCORDING TO SIGNAL AREA ONLY HU LAUNCH IN PROGRESS HV WORK COMPLETED HW WORK IN PROGRESS HX CONCENTRATION OF BIRDS HY SNOW BANKS EXIST HZ COVERED BY FROZEN RUTS AND RIDGES Top (K) KK Volcanic Activity Top Limitations (L) LA OPERATING ON AUXILIARY POWER SUPPLY LB RESERVED FOR AIRCRAFT BASED THEREIN LC CLOSED LD UNSAFE LE OPERATING WITHOUT AUXILIARY POWER SUPPLY LF INTERFERENCE FROM LG OPERATING WITHOUT IDENTIFICATION LH UNSERVICEABLE FOR AIRCRAFT HEAVIER THAN LI CLOSED TO IFR OPERATIONS LK OPERATING AS A FIXED LIGHT LL USABLE FOR LENGTH OF AND WIDTH OF LN CLOSED TO ALL NIGHT OPERATIONS LP PROHIBITED TO LR AIRCRAFT RESTRICTED TO RUNWAYS AND TAXIWAYS LS SUBJECT TO INTERRUPTION LT LIMITED TO LV CLOSED TO VFR OPERATIONS LW WILL TAKE PLACE LX OPERATING BUT CAUTION ADVISED DUE TO LY EFFECTIVE TT HAZARD Top Other (X) XX Top