List of Q Codes QAA Unassigned QAB May I have clearance from ... to ... at ...(height) above ...(datum). QAC Unassigned QAD Unassigned QAE Unassigned QAF Will you advise me when you are/were at/over ...(place) QAG Arrange your flight in order to arrive over ...(place) at ...(time) QAH What is you height above ...(datum) QAI What is the essential aircraft (not communications) traffic QAJ Unassigned QAK Is there any risk of collision QAL Are you going to land at ...(place) or Has aircraft landed at ...(place) QAM What is the latest available meteorological observation for ...(place) QAN What is the surface wind direction and speed at ...(place) QAO What is the wind direction, in degrees TRUE, and the speed at ...(place) QAP Shall I listen for you on ... kHz/MHz QAQ Am I near a prohibited area QAR May I stop listening on the watch frequency for ... minutes QAS Unassigned QAT Unassigned QAU I am about to jettison fuel QAV Are you able to home on your DF equipment QAW I am about to carry out overshoot procedure QAX Unassigned QAY Will you advise me when you pass ...(place) bearing 090 degrees QAZ Are you experiencing communication difficulties due to a storm QBA What is the horizontal visibility at ...(place) QBB What is the amount, type and height of the cloud base at ...(place) QBC Report meteorological conditions at...(position) at ...(time) QBD How much fuel have you remaining QBE I am about to wind in my aerial QBF Are you flying in cloud QBG Are you flying above cloud QBH Are you flying below cloud QBI Is flight under IFR compulsory at ...(place) QBJ What is the amount, type and height of the cloud top at ...(place) QBK Are you flying with no cloud in your vicinity QBL Unassigned QBM Has ...(callsign) sent any message for me QBN Are you flying between two layers of cloud QBO What is the nearest aerodrome where flight under VFR is permissible QBP Are you flying in and out of cloud QBQ Unassigned QBR Unassigned QBS Ascend or descend to ...(figures and units) height above ...(datum) QBT How far along the runway can the observer see the runway lights QBU Unassigned QBV Have you reached the ...(figures and units) height above ...(datum) QBW Unassigned QBX Have you left the ...(figures and units) height above ...(datum) QBY Unassigned QBZ Report your flying conditions in relation to clouds QCA May I change from ... to ...(figures and units) height above ...(datum) QCB Delay is being caused by ...(reason) QCC Unassigned QCD Unassigned QCE When may I expect approach clearance QCF Delay indefinite. Expect approach clearance not later than ... hours QCG Unassigned QCH May I taxi to ...(place) QCI Make a 360 degree turn immediately, turning to the ...(right/left) QCJ Unassigned QCK Unassigned QCL Unassigned QCM Unassigned QCN Unassigned QCO Unassigned QCP Unassigned QCQ Unassigned QCR Unassigned QCS My reception on ... frequency has broken down QCT Unassigned QCU Unassigned QCV Unassigned QCW Unassigned QCX What is your full callsign QCY I am working on trailing aerial QCZ Unassigned QDA Unassigned QDB Have you sent message ... to ...(callsign) QDC Unassigned QDD Unassigned QDE Unassigned QDF What is your D-value at ...(position) QDG Unassigned QDH Unassigned QDI Unassigned QDJ Unassigned QDK Unassigned QDL Do you intend to ask me for a series of bearings QDM Indicate the MAGNETIC heading for me to steer towards you, with no wind QDN Unassigned QDO Unassigned QDP Will you accept control or responsibility of ... now, or at ... hours QDQ Unassigned QDR What is my MAGNETIC bearing from you, or from ...(callsign) QDS Unassigned QDT Are you flying in visual meteorological conditions (VMC) QDU Cancel my IFR flight plan QDV Are you flying in a horizontal visibility of less than ...(figures and units) QDW Unassigned QDX Unassigned QDY Unassigned QDZ Unassigned QEA May I cross the runway ahead of me QEB May I turn at the intersection QEC May I make a 180 degree turn and return down the runway QED Shall I follow the pilot vehicle QEE Unassigned QEF Have I/you reached my/your parking area QEG May I leave the parking area QEH May I move to the holding position for runway number ... QEI Unassigned QEJ May I assume position for take-off QEK Are you ready for immediate take-off QEL May I take-off and make a ...(left/right) hand turn after take-off QEM What is the condition of the landing surface at ...(place) QEN Shall I hold my position QEO Shall I clear the runway or landing area QEP Unassigned QEQ Unassigned QER Unassigned QES Is a right hand circuit in force at ...(place) QET Unassigned QEU Unassigned QEV Unassigned QEW Unassigned QEX Unassigned, but adopted by the American Radio Relay League in the title of its journal called "QEX incorporating Communications Quarterly". QEY Unassigned QEZ Unassigned QFA What is the meteorological forcast for ...(flight, route etc.) QFB The approach/runway/approach and runway lights are out of order QFC What is the amount, type and height of the cloud base above ...(datum) QFD Is the ... visual beacon at ...(place) in operation QFE What is the atmospheric pressure, at aerodrome elevation, at ...(place) QFF What is the atmospheric pressure, converted to mean sea level, at ...(place) QFG Am I overhead QFH May I descend below the clouds QFI Are the aerodrome lights lit or Please light the aerodrome lights QFJ Unassigned QFK Unassigned QFL Will you send up pyrotechnical lights QFM What height above ...(datum) should I maintain/are you maintaining QFN Unassigned QFO May I land immediately QFP Will you give me the latest information concerning ... at ...(place) QFQ Are the approach and runway lights lit QFR Does my landing gear appear damaged QFS Is the radio facility at ...(place) in operation QFT Between what heights above ...(datum) has ice formation been observed QFU What is the MAGNETIC direction or number of the runway to be used QFV Are the floodlights switched on or Please switch on the floodlights QFW What is the length of the runway in ...(figures and units) QFX I am working on a fixed aerial or Work on a fixed aerial QFY Please report the present meteorological landing conditions at ...(place) QFZ What is the aerodrome meteorological forecast for ...(place) QGA Unassigned QGB Unassigned QGC There are obstructions to the ...(left/right) of the runway QGD Are there any obstructions on my track that equal or exceed my altitude QGE What is my distance to your station or to ...(place) QGF Unassigned QGG Unassigned QGH May I land using ...(procedure/facility) QGI Unassigned QGJ Unassigned QGK What track should I make good or What track are you making good QGL May I enter the ...(control area/zone) at ...(place) QGM Leave the ...(control area/zone) QGN May I be cleared to land at ...(place) QGO Landing is prohibited at ...(place) QGP What is my number for landing QGQ May I hold at ...(place) QGR Unassigned QGS Unassigned QGT Fly for ... minutes on a heading that maintains a reciprocle track QGU Fly for ... minutes on a MAGNETIC heading of ... degrees QGV Do you see me or Can you see the aerodrome or Can you see ...(aircraft) QGW Does my landing gear appear to be down and in place QGX Unassigned QGY Unassigned QGZ Hold on ... direction of ... facility QHA Unassigned QHB Unassigned QHC Unassigned QHD Unassigned QHE Will you inform me when you are on ... leg of approach QHF Unassigned QHG May I enter traffic circuit at ...(figures and units) above ...(datum) QHH Are you making an emergency landing QHI Are you (or is ...) ...(waterbourne/on land) QHJ Unassigned QHK Unassigned QHL Unassigned QHM Unassigned QHN Unassigned QHO Unassigned QHP Unassigned QHQ May I make a ... approach at ...(place) or Are you making a ... approach QHR Unassigned QHS Unassigned QHT Unassigned QHU Unassigned QHV Unassigned QHW Unassigned QHX Unassigned QHY Unassigned QHZ Shall I circle the aerodrome (or go around) QIA Unassigned QIB Unassigned QIC May I establish communication with ...(callsign) on ... kHZ/MHz QID Unassigned QIE Unassigned QIF What frequency is ...(callsign) using QIG Unassigned QIH Unassigned QII Unassigned QIJ Unassigned QIK Unassigned QIL Unassigned QIM Unassigned QIN Unassigned QIO Unassigned QIP Unassigned QIQ Unassigned QIR Unassigned QIS Unassigned QIT Unassigned QIU Unassigned QIV Unassigned QIW Unassigned QIX Unassigned QIY Unassigned QIZ Unassigned QJA Is my ...(tape/mark and space) reversed QJB Will you use ...(radio/cable/telegraph/teletypwriter/telphone/receiver/ transmitter/reperforator) QJC Will you check your ...(transmitter-distributor/auto-head/perforator/ printer/printer motor/keyboard/antenna system) QJD Am I transmitting in ...(letters/figures) QJE Is my frequency shift ...(too wide/too narrow/correct) QJF My signal as checked by monitor ...(locally/as radiated) is satisfactory QJG Shall I revert to automatic relay QJH Shall I run ...(my test tape/a test sentence) QJI Will you transmit a continuous ...(mark/space) QJJ Unassigned QJK Are you receiving a ...(continuous mark/continuous space/ mark bias/space bias) QJL Unassigned QJM Unassigned QJN Unassigned QJO Unassigned QJP Unassigned QJQ Unassigned QJR Unassigned QJS Unassigned QJT Unassigned QJU Unassigned QJV Unassigned QJW Unassigned QJX Unassigned QJY Unassigned QJZ Unassigned QKA I have effected rescue and am proceeding to ...(base) QKB Unassigned QKC The sea conditions at ...(place) permit ...(alighting but not take-off/ extremely hazardous alighting) QKD Unassigned QKE Unassigned QKF May I be relieved at ... hours QKG Will relief take place when ...(ident) establishes ...(visual/ communications) contact with survivors QKH Report details of the parallel sweep to be conducted QKI Unassigned QKJ Unassigned QKK Unassigned QKL Unassigned QKM Has the location of the survival craft been marked QKN Aircraft plotted (believed to be you) in position ... at ... hours QKO What other units are taking part in the operation QKP What pattern of search is being followed QKQ Unassigned QKR Unassigned QKS Unassigned QKT Unassigned QKU Unassigned QKV Unassigned QKW What has the rescue vessel or rescue aircraft recovered QKX Unassigned QKY Are you in the search area designated as ...(lat/long or designator) QKZ What is the estimated drift of the survival craft QLA Unassigned QLB Will you monitor ...(callsign) and report range, quality, etc. QLC Unassigned QLD Unassigned QLE Unassigned QLF Unassigned QLG Unassigned QLH Will you use simultaneous keying on ... frequency and ... frequency QLI Unassigned QLJ Unassigned QLK Unassigned QLL Unassigned QLM Unassigned QLN Unassigned QLO Unassigned QLP Unassigned QLQ Unassigned QLR Unassigned QLS Unassigned QLT Unassigned QLU Unassigned QLV Is the ... radio facility still required QLW Unassigned QLX Unassigned QLY Unassigned QLZ Unassigned QMA Unassigned QMB Unassigned QMC Unassigned QMD Unassigned QME Unassigned QMF Unassigned QMG Unassigned QMH Shift to transmit and receive on ... kHz/MHz QMI Report the vertical distribution of cloud at ...(position) QMJ Unassigned QMK Unassigned QML Unassigned QMM Unassigned QMN Unassigned QMO Unassigned QMP Unassigned QMQ Unassigned QMR Unassigned QMS Unassigned QMT Unassigned QMU What is the surface temperature and dew point at ...(position) QMV Unassigned QMW At what heights above ...(datum) are the zero celsius isotherms QMX What is the air temperature at ...(position) at ...(units and figures) height above ...(datum) QMY Unassigned QMZ Have you any amendments to the flight forecast in respect of sections of the route yet to be traversed QNA Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Answer in prearranged order". (This code should only be used by the Net Control Station). QNB Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Act as relay station between ..... and .....". (This code should only be used by the Net Control Station). QNC Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "All net stations copy. I have a message for all net stations". QND Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net is directed (controlled by net control station)". (This code should only be used by the Net Control Station). QNE What indication will my altimeter give on landing at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning "Entire net stand by". (This code should only be used by the Net Control Station). QNF Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net is free (not controlled)". QNG Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Take over as net contol station". QNH What should I set on the sub-scale of my altimeter so that the instrument would indicate my elevation if I were on the ground at your station. Also adopted by the ARRL, for use only in CW nets, as meaning "Your net frequency is high". QNI Between what heights above ...(datum) has turbulence been observed at ...(position). Also adopted by the ARRL, for use only in CW nets, as meaning "Net stations report in" OR "I am reporting into the net". (Follow with a list of traffic or QRU). QNJ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Can you copy me". QNK Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Transmit messages for ..... to .....". (This code should only be used by the Net Control Station). QNL Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Your net frequency is low". QNM Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "You are QRMing the net. Stand by". (This code should only be used by the Net Control Station). QNN Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net control station is ....." OR "What station has net control". QNO I am not equipped to give the information/provide the facility requested Also adopted by the ARRL, for use only in CW nets, as meaning "Station is leaving the net". QNP Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Unable to copy you" OR "Unable to copy .....". QNQ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Move frequency to ..... and wait for ..... to finish handling traffic. Then send him traffic for .....". QNR I am approaching my point of no return. Also adopted by the ARRL, for use only in CW nets, as meaning "Answer ..... and receive traffic". (This code should only be used by the Net Control Station). QNS Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Following stations are in the net" (Follow with list), when used by Net Control Station OR "Request list of stations in the net", when used by other net members. QNT What is the maximum gust speed of the wind at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning "I request permission to leave the net for ..... minutes". QNU Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "The net has traffic for you. Stand by". This code should only be used by the Net Control Station. QNV Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Establish contact with ..... on the frequency. If successful, move to ..... and send him traffic for .....". (This code should only be used by the Net Control Station). QNW Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "How do I route messages for .....". QNX Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "You are excused from the net", when used by Net Control Station OR "Request to be excused from the net", when used by other net members. QNY What is the present weather, and intensity thereof, at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning "Shift to another frequency, or to .....kHz, to clear traffic with .....". (This code should only be used by the Net Control Station). QNZ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Zero beat your signal with mine". QOA to QOZ The series QOA to QQZ, inclusive, have been reserved for QPA to QPZ the Maritime Services but no meanings have been assigned QQA to QQZ to date. QRA What is the name of your station QRB How far, approximately, are you from my station QRC What authority/administration settles the accounts of your station QRD Where are you bound and where are you from QRE What is your estimated time of arrival at ...(place) QRF Are you returning to ...(place) QRG Will you tell me my exact frequency or that of ...(callsign) QRH Does my frequency vary QRI How is the tone of my transmission QRJ How many radio telephone calls have you to book. (See note at the end of this list for a possible alternative meaning). QRK What is the intelligibility of my signals or those of ...(callsign) QRL Are you busy QRM Are you being interfered with QRN Are you troubled by static QRO Shall I increase transmitter power QRP Shall I decrease transmitter power QRQ Shall I send faster QRR Are you ready for automatic operation QRS Shall I send more slowly QRSS Officially unrecognised code, but used by the Amateur Radio Service to mean "Send extremely slowly" This means speeds of one word per minute or less and is a specialised mode used in sub-noise-level communication on the VLF bands. This mode requires special sending and decoding techniques. QRT Shall I stop sending QRU Have you anything for me QRV Are you ready QRW Shall I inform ...(callsign) that you are calling him on ... kHz/MHz QRX When will you call me again on ... kHz/MHz. Must I wait QRY What is my turn QRZ Who is calling me QSA What is the strength of my signals or those of ...(callsign) QSB Are my signals fading QSC Are you a cargo vessel QSD Is my keying defective QSE What is the estimated drift of the survival craft QSF Have you effected rescue QSG Shall I send ...(number) telegrams at a time QSH Are you able to home on your D/F equipment QSI Will you inform ...(callsign) that I have been unable to break in QSJ What is the charge to be collected to ...(callsign), including your charge QSK Can you hear me between your signals and, if so, can I break in QSL Can you acknowledge receipt QSLL Officially unrecognised code, but used by the Amateur Radio Service to mean "I will send you a QSL card for this contact after I receive one from you" QSM Shall I repeat the last telegram which I sent to you QSN Did you hear me or ...(callsign) on ... kHz/MHz QSO Can you communicate with ...(callsign) direct or by relay QSP Will you relay to ...(callsign), free of charge QSQ Have you a doctor on board or Is ...(named person) on board QSR Shall I repeat the call on the calling frequency QSS What working frequency will you use QST Unassigned, but adopted by the American Radio Relay League to mean "CQ ARRL members". Also the title of the ARRL's official journal. QSU Shall I send or reply on this frequency or on ... kHz/MHz QSV Shall I send a series of V's on this frequency or on ... kHz/MHz QSW Will you send on this frequency or on ... kHz/MHz QSX Will you listen to ...(callsign) on ... kHz/MHz QSY Shall I change to transmission on another frequency QSZ Shall I send each word or group more than once QTA Shall I cancel telegram number ... QTB Do you agree with my counting of words QTC How many telegrams have you to send QTD What has the rescue vessel or rescue aircraft recovered QTE What is my TRUE bearing from you or from ...(callsign) QTF Will you give me the position of my station according to the bearings taken by the D/F stations which you control QTG Will you send two dashes of ten seconds each followed by your callsign repeated ... times on ... kHz/MHz QTH What is your position in latitude and longitude (or according to any other indication) QTHR Officially unrecognised code, but adopted by the RSGB to mean "Name and address correct in the UK Call Book" QTI What is your TRUE track QTJ What is your speed QTK What is the speed of your aircraft in relation to the earth's surface QTL What is you TRUE heading QTM What is your MAGNETIC heading QTN At what time did you depart from ...(place) QTO Are you airborne or Have you left dock/port QTP Are you going to alight/land or Are you going to enter dock/port QTQ Can you communicate with my station by means of the international code of signals QTR What is the correct time QTS Will you send your callsign for tuning purposes or frequency measurement QTT The identification signal which follows is superimposed on another transmission QTU What are the hours during which your station is open QTV Shall I stand guard for you on the frequency of ...kHz/MHz QTW What is the condition of survivors QTX Will you keep your station open for further communication with me QTY Are you proceeding to the position of the incident and, if so, when do you expect to arrive QTZ Are you continuing the search QUA Have you news of ...(callsign) QUB Can you give me, in the following order, information concerning:- the direction in degrees TRUE and the speed of the surface wind, present weather, visibility and amount, type and height of cloud base above the surface elevation at ...(place) QUC What is the number or other identification of the last message you received from me or from ...(callsign) QUD Have you received the urgency signal sent by ...(callsign) QUE Can you use telephony in ...(language), with interpreter if necessary, if so, on what frequencies QUF Have you received the distress signal sent by ...(callsign) QUG Will you be forced to alight or land QUH Will you give me the present barometric pressure at sea level QUI Are your navigation lights working QUJ Will you indicate the TRUE track to reach you QUK Can you tell me the condition of the sea observed at ...(place) QUL Can you tell me the swell observed at ...(place) QUM May I resume normal working or Has the distress traffic ended QUN Will vessels in my immediate vicinity please indicate their position, TRUE course and speed QUO Shall I search for ...(aircraft/ship/survival craft) in the vicinity of...(position) QUP Will you indicate your position by ...(searchlight/black smoke trail/ pyrotechnic lights) QUQ Shall I train my searchlight nearly vertical on a cloud, occulting if possible and, if your aircraft is seen or heard, deflect the beam up wind and on the water or land to facilitate your landing QUR Have survivors ...(received survival equipment/been picked up by a rescue vessel/been reached by ground rescue party) QUS Have you sighted survivors or wreckage. If so in what position QUT Is position of incident marked QUU Shall I home ship or aircraft to my position QUV What is my MAGNETIC bearing from you or from ...(callsign) QUW Are you in the search area designated as ...(lat/long or designator) QUX Will you indicate the MAGNETIC course for me to steer towards you or ...(callsign) with no wind QUY Is position of survival craft marked QUZ Unassigned QVA to QVZ No "official" meanings for the series QVA to QZZ, inclusive, have QWA to QWZ been allocated to date, but see note below. QXA to QXZ QYA to QYZ QZA to QZZ NOTES The ARRL has assigned "unofficial" meanings to QEX and QST and to all codes in the QNA to QNZ series. These are included in the above list. Also included, are the meanings of the officially unrecognised four letter codes QRSS, QSLL and QTHR. Robert Harris, in his book "Enigma", states that QRJ, QWP, QXA, QXH and QZE have the meanings stated below, but the authenticity of these definitions is open to debate. QRJ Your signals are too weak QWP Observe Regulations QXAn My message consists of n cipher groups QXH Broadcast your traffic QZE Your frequency is too high