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THE DOCUMENT TO WHICH this introduction refers was extracted from a fairly old
copy of the Allied Communications Publication 131(B) amended to Change No 1.

My reason for "publishing" these meanings is partly nostalgic and
partly for the unintentional humour some of them seem to engender.
If I have time, I may compile a list of the Allied Z-code, although it would
probably only be of passing interest. (Even though ZBM2 could perhaps be used
to inflict some pain in certain circumstances).

E&OE of course.

    1) a qualified speed-key operator.
    2) a competent operator.

Question: Answer, Advice or Order:

QAA -unassigned-

QAB May I have clearance (for...) You are cleared ( cleared)
from...(place and/or control) by...from...(place and/or control)
at...(figures & units) height to...(place and/or control) at...
above...(datum)? (figures & units) height above...

QAC -unassigned-

QAD -unassigned-

QAE -unassigned-

QAF Will you advise me when you I am (was) at (over)...(place)
are (were) at (over)... (at...hours) (at...(figures
(place)? units)) height above...(datum)

QAG Arrange your flight in order to
        arrive over...(place) at...hours.
        I am arranging my flight in order
        to arrive over...(place) at ...hours

QAH What is your height above... I am at...(figures & units) height
(datum)? above datum.

Note: An aircraft is permitted to reply to QAH IMI by using any of
the answer forms of signals QBF, QBG, QBH, QBK, QBN or QBP. In such
cases the signal QAH is omitted from the reply.
        Arrange your flight so as to reach...
        (figures & units) height above...(datum)
        at...(hours or place).

QAI What is the essential traffic? The essential traffic is...

Note: Relates to aircraft and Note: Relates to aircraft and not
not communications traffic. communications traffic.

QAJ -unassigned-

QAK Is there any risk of collision? There is risk of collision.

Note: This signal should be followed by appropriate Q signals or
ICAO approved abbreviations giving instructions for avoiding collision.

QAL Are you going to land at... I am going to land at...(place).
         or or
Has aircraft landed at... You may land at...(place).
(place)? or
(See also signal QTP). Aircraft...landed at...(place).
        (See also signal QTP)

QAM What is the latest available Meteorological observation made
meteorological observation at...hours was as follows...

Note: The information may be given in Q-code form or the AERO form
of the International Meteorological Figure Code. When in Q-code,
the information is to be given in the following sequence of Q-signal
answer (or advice) forms: QAN, QBA, QNY, QBB, QNH and/or QFE and,
if necessary QMU, QNT, QBJ. It is not normally necessary to precede the
QAN, QBA, QNY and QBB information by these Q-signals but this may be
done if considered desirable. When in the AERO form of International
Meteorological Figure Code, the abbreviation AERO is to precede
the information.

QAN What is the surface wind The surface wind direction & speed
direction & speed at... at...(place) at...hours is...(dir-
(place)? ection)...(speed figures & units).

Note: Unless otherwise indicated in the question, answer (or advice),
surface wind direction is given in degrees relative to MAGNETIC North.

QAO What is the wind direction in The wind direction & speed at...
degrees TRUE and speed at... (position or zone/s) at the follow-
(position or zone/s) at each ing heights above...(datum) is:
of the...(figures)...(units) ...(vertical distance in figures &
levels above...(datum)? units)...degrees TRUE...(speed in
        figures and units).

QAP Shall I listen for you (or Listen for me (or for...) on...kHz
for...) on ...kHz (or... (...MHz).
MHz)? Note: If the frequency is given in
Note: If the frequency is MHz, the abbreviation "MHz" is to
given in MHz, the abbreviation be used.
"MHz" is to be used. (See also signal QSX).
(See also signal QSX).

QAQ Am I near a prohibited area You are...
(or...prohibited area)? 1) near
          2) flying over
        a prohibited area (or...prohibited area).

QAR May I stop listening on the You may stop listening on the watch
watch frequency for... minutes? frequency for...minutes.

QAS -unassigned-

QAT -unassigned-

QAU I am about to jettison fuel.

QAV Are you able to home on I am homing on my DF equipment
your DF equipment? on...station.

QAW I am about to carry out overshoot

QAX -unassigned-

QAY Will you advise me when you I passed...(place) bearing...degrees
pass (passed)...(place) relative to my heading at...hours.
bearing 090 (270) degrees
relative to your heading?

QAZ Are you experiencing comm- I am experiencing communication
unication difficulties difficulties through flying in a
through flying in a storm? storm.

Note: attention is invited to the possible supplementary use of
signals QAR, QBE, QCS, QRM, QRN, QRX QSZ or the signal CL to amplify the
meaning associated with signal QAZ.

QBA What is the horizontal visib- The horizontal visibility at...
ility at...(place)? (place) at...hours is...(distance
        figures & units).

QBB What is the amount, type and The amount, type and height above
height above official aero- official aerodrome elevation of the
drom elevation of the base base of the cloud at...(place) at...
of the cloud (at...(place))? hours is:
          ...eighths [oktas] (...type)
          at...(figures & units)*
          height above official
          aerodrome elevation.

*Note: The cloud amount, type (if reported) and vertical
distance information is reported in sequence if several
cloud layers are present, the order of reporting being
from low to high levels in accordance with the following
        a) the lowest individual layer of any amount;
        b) the next higher individual layer the amount of
         which is three-eighths [3 oktas] (to the nearest
         eighth [okta]);
        c) the next higher individual layer the amount of which
         is five-eighths [5 oktas] or more (to the nearest
         eighth [okta]).

Example: = QBB CYUL 1300 2 300 FT 3 1500 FT 6 9000 FT =

QBC Report meteorological The meteorological conditions
conditions as observed as observed from my aircraft
from your aircraft at...(position or zone) at ...
(at...(position or zone)) hours at ...(figures and units)
(at...hours). height above...datum) are ...

Note: - The information may be given in the AIREP, POMAR or Q
Code form. When given in Q Code, the following sequence of
Q signal answer (or advice) forms is used: QMX, QNY, QAO,

QBD How much fuel have you Fuel remaining is ...(hours
remaining (expressed as and/or minutes of consumption).
hours and/or minutes of

QBE I am about to wind in my aerial.

QBF Are you flying in cloud? I am flying in cloud at ...
        (figures and units) height above
        ...(datum) (and I am ascending
        (descending) to ... (figures and
        units) height above that datum).

QBG Are you flying above cloud? I am flying above cloud and at ...
        (figures and units) height above
        Maintain a vertical distance of
        ...(figures and units) above
        cloud, smoke, haze or fog levels.

QBH Are you flying below cloud? I am flying below cloud and at ...
        (figures and units) height above
        Maintain a vertical distance of
        ...(figures and units) below

QBI Is flight under IFR Flight under IFR is compulsory
compulsory at... at...(place) (or
(place) (or from... (place)).

QBJ What is the amount, type At...hours at...(position or zone)
and height above...(datum) the top of the cloud is:
...(datum) of the top of the amount...eighths) (...type) at...
cloud (at ...(position or (figures and units) height
zone))? above...(datum).

QBK Are you flying with no cloud I am flying with no cloud
in your vicinity? in my vicinity and at ...
        (figures and units) height above

QBM Has...sent any message for me? Here is the message sent by... at
        ... hours.

QBN Are you flying between two I am flying between two layers
layers of cloud? of cloud and at ...(figures and
        units) height above...(datum).

QBO What is the nearest Flying under VFR is permissible
aerodrome at which flight at...(place) which would be suitable
under VFR is permissible and for your landing.
which would be suitable for
my landing?

QBP Are you flying in and out of I am flying in and out of cloud
cloud? and at ...(figures and units)
        height above...(datum).

QBQ -unassigned-

QBR -unassigned-

QBS Ascend or descend to...(figures
        and units) height above...(datum)
        before encountering instrument
        meteorological conditions or if
        visibility falls beow...(figures
        and units of distance) and advise.

QBT How far, along the runway, At...hours, the observer at the
from the approach end, can threshold of runway number...could
the observer at the runway see the runway lights in operatation
threshold see the runway for your landing (at...(place)) for
lights which will be in a distance of...(figures & units)
operation for my landing from the approach end.

Note: If the station enquired of is
not equipped to make the special observation requested,
the reply to QBT IMI is given by the signal QNO.

QBU -unassigned-

QBV Have you reached the... I have reached the...(figures &
(figures & units) height units) height above...(datum) (or
above...(datum) (or... ...(area or place)).
(area or place))? or
        Report reaching the...
        (figures & units)
        height above...(datum)
        (or (area or place)).

QBW -unassigned-

QBX Have you left the...(figures I have left the...(figures & units)
& units) height above... height above...(datum) (or...(area
(datum) (or...(area or place))? or place)).
        Report leaving the...(figures & units)
        height above...(datum) (or (area or

QBY -unassigned-

QBZ Report your flying conditions The reply to QBZ IMI is given by the
in relation to clouds. appropriate answer form of signals
        QBF, QBG, QBH, QBK, QBN and QBP.

QCA May I change from...(figures You may change from...(figures &
& units) to...(figures & units) height above...(datum).
units) height above...(datum)? or
        I am changing from...(figures &
        units) to...(figures & units)
        height above...(datum)

QCB Delay is being caused by...
          1) your transmitting out of turn.
          2) your slowness in answering
          3) lack of your reply to my...

QCC -unassigned-

QCD -unassigned-

QCE When may I expect approach Expect approach clearance at...hours
clearance? or
        No delay expected.

QCF Delay indefinite. Expect approach
        clearance not later than...hours.

QCG -unassigned-

QCH May I taxi to...(place)? Cleared to taxi to...(place). (The
        place is given in plain language).

QCI Make a 360-degree turn immediately
        (turning to the...).
        I am making a 360-degree turn
        immediately (turning to the...).
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? My full callsign is...
        Use your full callsign until
        further notice.

QCY I am working on trailing aerial.
        Work on trailing aerial.

QCZ -unassigned-

QDA -unassigned-

QDB Have you sent message... I have sent

QDC -unassigned-

QDD -unassigned-

QDE -unassigned-

QDF What is your D-Value My D-Value at...(position) at...
at...(position)? (figures & units) height above the
        1013.2 millibars datum is...
        (D-Value figures & units)...*
        (specify plus or minus)
         or or
What is the D-value at The D-Value at...(place or position)
...(place or position) at...hours for the ...millibar
(at...hours) for the... level is...(D-value figures and
millibar level? units)...* (specify plus or minus).

*Note: When the true altitude (radio altitude)
is greater than the pressure altitude PS (plus)
is used and when it is less MS (minus) is used.

QDG -unassigned-

QDH -unassigned-

QDI -unassigned-

QDJ -unassigned-

QDK -unassigned-

QDL Do you intend to ask me for I intend to ask you for a series of
a series of bearings? bearings.

QDM Will you indicate the The MAGNETIC heading for you to
MAGNETIC heading for me to steer to reach me (or...) with no
steer towards you (or...) wind was...degrees (at...hours).
with no wind?

QDN -unassigned-

QDO -unassigned-

QDP Will you accept control I will accept control (or respon-
(or responsibility) of sibility) of (for) (or at
... now (or at ...hours)? ...hours).

QDQ -unassigned-

QDR What is my MAGNETIC bearing Your MAGNETIC bearing from me
from you (or from...)? (or from...) was...degrees (at...

QDS -unassigned-

QDT Are you flying in Visual I am flying in Visual Meteorological
Meteorological Conditions Conditions (VMC).
(VMC)? or
        Fly at all times in Visual Meteor-
        ological Conditions (VMC).

QDU Cancel my IFR flight plan.

QDV Are you flying in a horizontal I am flying in a horizontal visibil-
visibility of less than... ity of less than...(figures & units)
(figures & units)? at...(figures & units) height above

QDW -unassigned-

QDX -unassigned-

QDY -unassigned-

QDZ -unassigned-

QEA May I cross the runway You may cross the runway ahead
ahead of me? of you.

QEB May I turn at the intersection? Taxi as follows at the intersection:
        (straight ahead DRT
        turn left LEFT
        turn right RITE).

QEC May I make a 180-degree turn You may make a 180-degree turn and
and return down the runway? return down the runway.

QED Shall I follow the pilot Follow the pilot vehicle.

QEE -unassigned-

QEF Have I reached my parking area? You have reached your parking area.
or or
Have you reached your parking I have reached my parking area.

QEG May I leave the parking area? You may leave the parking area.
or or
Have you left the parking area? I have left the parking area.

QEH May I move to the holding Cleared to the holding position for
position for runway number...? runway number...
or or
Have you moved to the holding I have moved to the holding position
position for runway number...? for runway number...

QEI -unassigned-

QEJ May I assume position for Cleared to hold at take-off position
take-off? for runway number...
or or
Have you assumed position I am assuming take-off position for
for take-off? runway number...and am holding.

QEK Are you ready for immediate I am ready for immediate take-off.

QEL May I take-off (and make You are cleared to take-off (turn as
a...hand turn after take- follows after take-off...).

QEM What is the condition of the The condition of the landing surface
landing surface at...(place)? at...(place) is...

Note: the information is given by sending appropriate NOTAM Code groups.

QEN Shall I hold my position? Hold your position.

QEO Shall I clear the runway (or Clear the runway (or landing area).
landing area)?
or or
Have you cleared the runway I have cleared the runway (or
(or landing area)? landing area).

QEP -unassigned-

QEQ -unassigned-

QER -unassigned-

QES Is a right-hand circuit in A right-hand circuit is in force
force at...(place)? at...(place).

QET -unassigned-

QEU -unassigned-

QEV -unassigned-

QEW -unassigned-

QEX -unassigned-

QEY -unassigned-

QEZ -unassigned-

QFA What is the meteorological The meteorological forecast for...
forecast for...(flight, (flight, route, section of route or
route, section of route or zone) for the period...hours until
zone) for the period...hours ...hours is...

Note: When the forecast is given in
Q Code the following sequence of Q
signal answer (or advice) forms is
to be given: QAO, QMX, QMI, QNY, QBA, QMW, QFT and QNI.

QFB The...
          1) approach
          2) runway
          3) approach & runway lights are
          out of order.

QFC What is the amount, the type At...(place, position or zone) the
and height above...(datum) of base of the cloud is...eighths
the base of the cloud at... [oktas]...type at...(figures &
(place, position or zone)? units) height above...(datum).

Note: if several cloud layers or masses are present,
the lowest is reported first.

QFD 1) Is the...visual beacon (at 1) The...visual beacon (at...
...(place) in operation? (place))is in operation.
2) Will you switch on the... 2) I will extinguish the aerodrome
visual beacon (at...(place))? beacon (at...(place)) until your
3) Will you extinguish the landing is completed.
aerodrome visual beacon (at
...(place)) until I have

QFE (At...(place)) what is the At...(place) the atmospheric
present atmospheric pressure pressure at official aerodrome
at official aerodrome elevation? elevation is (or was observed at
        ...hours to be)...millibars.

QFF (At...(place)) what is the At...(place) the atmospheric
present atmospheric pressure pressure converted to mean sea
converted to mean sea level level in accordance with metero-
in accordance with meteor- ological practice is (or was
ological practice? determined at...hours to be)

QFG Am I overhead? You are overhead.

QFH May I descend below the clouds? You may descend below the clouds.

QFI Are the aerodrome lights lit? The aerodrome lights are lit.
Please light the aerodrome lights.

QFJ -unassigned-

QFK -unassigned-

QFL Will you send up pyrotechnical I will send up pyrotechnical lights.

QFM What height above...(datum) ...
... 1) Maintain (or fly at)...(figures
1) should I maintain? & units) height above...(datum).
2) are you maintaining? 2) I am maintaining...(figures &
3) do you intend cruising units) height above...(datum).
at? 3) I intend cruising at...(figures
          & units) height above...(datum).

QFN -unassigned-

QFO May I land immediately? You may land immediately.

QFP Will you give me the latest The latest information concerning...
information concerning... facility ( is as
facility (at...(place))? follows...

Note: The information is given by sending appropriate NOTAM Code groups.

QFQ Are the approach and runway The approach and runway lights
lights lit? are lit.
        Please light the approach and
        runway lights.

QFR Does my landing gear appear Your landing gear appears damaged.

QFS Is the radio facility at... facility at...(place)
(place) in operation? is in operation (or will be in
        operation in...hours).
        Please have facility
        at...(place) put in operation.

QFT Between what heights above Ice formation has been observed
...(datum) has ice formation at...(position or zone) in the type
been observed (at...(position of...and with an accretion rate of
or zone))? ...between...(figures & units) and
        ...(figures & units) heights above

QFU What is the magnetic direction The magnetic direction (or number)
(or number) of the runway to of the runway to be used is...
be used?

Note: The runway number is indicated
by a two-figure group and the magnetic
direction by a three-figure group.

QFV Are the floodlights switched on? The floodlights are switched on.
Please switch on the floodlights.

QFW What is the length of the runway The length of in use
in use in...(units)? is...(figures & units).

QFX I am working (or am going to work)
        on a fixed aerial.
        Work on a fixed aerial.

QFY Please report the present The present meteorological landing
meteorological landing conditions at...(place) are...
conditions (at...(place)).

Note: When given in Q Code the information is sent
in the following sequence: QAN, QBA, QNY, QBB, QNH and/or
QFE and, if necessary, QMU QNT, QBJ. It is not normally
necessary to precede the QAN, QBA, QNY and QBB information by these
Q signals but this may be done if considered desirable.

QFZ What is the aerodrome meteor- The aerodrome meteorological fore-
ological forecast for...(place) cast for...(place) for the period
for the period...hours until ...hours until...hours is...

Note: When given in Q Code the following sequence of Q signal
answer (or advice) forms is to be used: QAN, QBA, QNY, QBB and,
if necessary, QMU, QNT and QBJ.

QGA -unassigned-

QGB -unassigned-

QGC There are obstructions to the...
        of runway...

QGD Are there on my track any There are obstructions on your track
obstructions whose elevation ...(figures & units) height above...
equals or exceeds my (datum).

QGE What is my distance to Your distance to my station (or
your station (or to...)? to...) is...(distance figures &

Note: This signal is normally used in conjuction with one of the
signals QDM, QDR, QTE or QUJ.

QGF -unassigned-

QGG -unassigned-

QGH May I land using... You may land using...(procedure or
(procedure or facility)? facility).

QGI -unassigned-

QGJ -unassigned-

QGK What track should I make good? Make good a track from...(place)
        on...degrees...(true or magnetic).
         or or
What track are you making good? I am making good a track from...
        (place) on...degrees...
        (true or magnetic).

QGL May I enter the... (control You may enter the...(control area
area or zone) at...(place)? or zone) at...(place).

QGM Leave the...(control area or zone).

QGN May I be cleared to land You are cleared to land
at...(place). at...(place).

QGO Landing is prohibited at...(place).

QGP What is my number for landing? You are land.

QGQ May I hold at...(place)? Hold at...(place) at...(figures &
        units) height above...(datum) and

      await orders.

QGR -unassigned-

QGS -unassigned-

QGT Fly for...minutes on a heading that
        will enable you to maintain a track
        reciprocal to your present one.

QGU Fly for...minutes on a magnetic
        heading of...degrees.

QGV Do you see me? I see you at...(cardinal or quad-
         or rantal point of direction).
Can you see the aerodrome? or
         or I can see the aerodrome.
Can you see...(aircraft)? or
        I see...(aircraft).

QGW Does my landing gear appear Your landing gear appears to be down
to be down and in place? 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 I am on...
you are on...leg of approach? 1) cross-wind leg)
          2) down-wind leg )
          3) base leg ) of approach.
          4) final leg )

QHF -unassigned-

QHG May I enter traffic circuit Cleared to enter traffic circuit
at...(figures & units) height at...(figures & units) height
above...(datum)? above...(datum).

QHH Are you making an emergency I am making an emergency landing.
landing? or
        Emergency landing being made at...
        (place). All aircraft below...
        (figures & units) height above...
        (datum) and within a distance of
        ...(figures & units) leave...
        (place or headings).

QHI Are you (or is...)... I am (
1) waterborne? 1) waterborne ) at...hours.
2) on land? 2) on land )

QHJ -unassigned-

QHK -unassigned-

QHL -unassigned-

QHM -unassigned-

QHN -unassigned-

QHO -unassigned-

QHP -unassigned-

QHQ May I make a...approach You may make a...approach (at...
at...(place))? (place)).
         or or
Are you making a...approach? I am 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 Circle the aerodrome (or go around).
(or go around)?

QIA -unassigned-

QIB -unassigned-

QIC May I establish communication Establish communication with... station on...kHz, radio station on...kHz (or...MHz)
(or...MHz) now (or at...hours)? now (or at...hours).

QID -unassigned-

QIE -unassigned-

QIF What frequency is...using? using...kHz. (or...MHz).

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... Your...
1) tape ) reversed? 1) tape ) is
2) mark & space ) 2) mark & space ) reversed.

QJB Will you use... I will use...
1) radio? 1) radio.
2) cable? 2) cable.
3) telegraph? 3) telegraph.
4) teletypwriter? 4) teletypwriter.
5) telephone? 5) telephone.
6) receiver? 6) receiver.
7) transmitter? 7) transmitter.
8) reperforator? 8) reperforator.

QJC Will you check your... I will check my...
1) transmitter- 1) transmitter-
distributor? distributor.
2) auto-head? 2) auto-head.
3) perforator? 3) perforator.
4) reperforator? 4) reperforator.
5) printer? 5) printer.
6) printer motor? 6) printer motor.
7) keyboard? 7) keyboard.
8) antenna system? 8) andtenna system.

QJD Am I transmitting... You are transmitting...
1) in letters? 1) in letters.
2) in figures? 2) in figures.

QJE Is my frequency shift... Your frequency shift is...
1) too wide? 1) too wide.
2) too narrow? 2) too narrow.
3) correct? 3) correct.

QJF My signal as checked by monitor...
        is satisfactory...
          1) locally.
          2) as radiated.

QJG Shall I revert to automatic Revert to automatic relay.

QJH Shall I run... Run...
1) my test tape? 1) your test tape.
2) a test sentence? 2) a test sentence.

QJI Will you transmit a Transmit a continuous...
1) mark? 1) mark.
2) space? 2) space.

QJJ -unassigned-

QJK Are you receiving... I am receiving...
1) a continuous mark? 1) a continuous mark.
2) a continuous space? 2) a continuous space.
3) a mark bias? 3) a mark bias.
4) a space bias? 4) a 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 (with...
        persons requiring ambulance).

QKB -unassigned-

QKC The sea conditions (at...position)
        1) permit alighting but not take-off.
        2) render alighting extremely hazardous.

QKD -unassigned-

QKE -unassigned-

QKF May I be relieved (at.. You may expect to be relieved at...
hours)? hours (by...1) aircraft...(ident-
        ification) (type...). 2) vessel
        whose callsign is...(callsign)
        (and/or whose name (

QKG Will relief take place when... Relief will take place when...
(identification) establishes... (identification) establishes...
1) visual, 1) visual,
2) communciations, contact 2) communcications, contact with
with survivors? survivors.

QKH Report details of the parallel
sweep (track search being (or
to be) conducted?
In the parallel sweep (track The parallel sweep (track) search is
search being (or to be) cond- being (or is to be) conducted...
ucted, what is (are)...
1) the direction of 1) with direction of sweeps...
sweeps? degrees...(true or magnetic).
2) the separation between 2) with...(distance figures &
sweeps? units) separation between
3) the height above the sweeps.
datum, employed in the 3) at a height of...(figures &
search pattern? units) above...(datum).

QKI -unassigned-

QKJ -unassigned-

QKK -unassigned-

QKL -unassigned-

QKM Has locationof the survival The location of the survival
craft been marked? craft was marked at...hours by:
          1) flame or smoke float.
          2) sea marker.
          3) sea marker dye.
          4) ...(specify other marking).

QKN Aircraft plotted (believed to be
        you) in position...on track...
        degrees at...hours.

QKO What other units are (or will In the operation (...(identification
be) taking part in the oper- )), the following units are (or will
ation (...(identification of be) taking part...(name of units).
operation))? or
        ...(name) unit is taking part in
        operation (...(identification))
        (with effect from...hours).

QKP Which pattern of search is The search pattern is...
being followed? 1) parallel sweep.
          2) square search.
          3) creeping line ahead.
          4) track crawl.
          5) contour search.
          6) combined search by aircraft
          and ship.
          7) ...(specify).

QKQ -unassigned-

QKR -unassigned-

QKS -unassigned-

QKT -unassigned-

QKU -unassigned-

QKV -unassigned-

QKW What has the rescue vessel ...(identification) has recovered:
or rescue aircraft recoverd? 1) (...(number)) survivors.
          2) wreckage.
          3) (...(number)) bodies.

QKX -unassigned-

QKY Are you in the search area I am in the (...(designation))
(designated as...(desig- search area.
nator or latitude/longitude))?

QKZ What is the estimated drift The estimated drift of the survival
of the survival craft? craft is...(figures and units).

QLA -unassigned-

QLB Will you monitor...station I have monitored...station and
and report regarding range, report (briefly) as follows...
quality, etc?

QLC -unassigned-

QLD -unassigned-

QLE -unassigned-

QLF -unassigned-

QLG -unassigned-

QLH Will you use simultaneous I will now key simultaneously on...
keying on...frequency and 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 facility facility is still
still required? 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 (or MHz);
        if communication is not established
        within 5 minutes, revert
        to present frequency.

QMI Report the vertical distrib- The vertical distribution of cloud
ution of cloud (at...(posit- as observed from my aircraft at...
ion or zone)) as observed hours at...(position or zone) is:
from your aircraft. lowest layer observed *...(eighths
        [oktas] (...type) with base of...
        (figures & units) and tops of...
        (figures & units).
        *(and similarly in sequence for
        each of the layers observed.)
        height above...(datum).

Example: = QMI 1400 11 2 CU 1000
FT 2500 FT 6 SC 6000 FT 10000 FT
5 AC 13000 FT 14000 FT MER =

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 The surface temperature at...(place)
at...(place) and what is the at...hours is...degrees and the dew
dew point temperature at that? point temperature at that time and
        place is...degrees.

QMV -unassigned-

QMW At...(position or zone) what At...(position or zone) the zero
is (are) the height(s) above celsius isotherm(s) is (are) at...
...(datum) of the zero celsius (figures & units) height above...
isotherm(s)? (datum).

QMX What is the air temperature At...(position or zone) at...hours
(at...(position or zone)) the air temperature is...(degrees
(at...hours) at the... and units) at...(figures & units)
(figures & units) height height above...(datum).

Note: Aircraft reporting QMX inform-
ation will transmit the temperature
figures as corrected for airspeed.

QMY -unassigned-

QMZ Have you any amendments to The following amendment(s) should be
the flight forecast in respect made to the flight forecast...
of section of route yet to be (If no amendments, signal QMZ NIL).

QNA -unassigned-

QNB -unassigned-

QNC -unassigned-

QND -unassigned-

QNE What indication will my On landing at...(place) at...hours
altimeter give on landing with your sub-scale being set to
at...(place) at...hours, my 1013.2 millibars (29.92 inches),
sub-scale being set to 1013.2 your altimeter will indicate...
millibars (29.92 inches)? (figures & units).

QNF -unassigned-

QNG -unassigned-

QNH What should I set on the sub- If you set the sub-scale of your
scale of my altimeter so that altimeter to read...millibars (or
the instrument would indicate hundredths of an inch *), the
my elevation if I were on the instrument would indicate your
ground at your station? elevation if you were on the ground
        at my station at...hours.

* Note: When the setting is given in hundredths of an inch the abbrev-
iation "INS" is used to identify the units.

QNI Between what heights above... Turbulence has been observed at...
(datum) has turbulence been (position or zone) with an intensity
observed at... (position or of...between...(figures & units)
zone)? and...(figures & units) heights

QNJ -unassigned-

QNK -unassigned-

QNL -unassigned-

QNM -unassigned-

QNN -unassigned-

QNO I am not equipped to give the
        information (or provide the
        facility) requested.

QNP -unassigned-

QNQ -unassigned-

QNR I am approaching my point of no

QNS -unassigned-

QNT What is the maximum gust speed The maximum gust speed of the
of the surface wind at... surface wind at...(place) at...
(place)? hours is...(speed figures & units).

QNU -unassigned-

QNV -unassigned-

QNW -unassigned-

QNX -unassigned-

QNY What is the present weather The present weather and intensity
and the intensity thereof thereof at...(place, position or
at...(place, position or zone) at...hours is... (See Notes
zone)? a) and b)).

a) When present weather information is transmitted by a ground station, the
information shall be selected from the present weather table
(Table III) in PANSMET (Doc 7605- MET/526). If none of these condit-
ions prevail the reply shall be QNY NIL.

b) When present weather information is transmitted by an aircraft, the
information shall be selected from item 11, AIREP. If none of these
conditions prevail the reply shall be QNY NIL or alternatively the
appropriate answer (or advice) form of signals QBF, QBG, QBH, QBK, QBN
or QBP. The alternative may also be given in addition to present weather
conditions when one or more of the conditions listed in Item 11 prevail.

QNZ -unassigned-

QOA to QQZ The series QOA to QQZ inclusive is reserved for
         the Maritime Services; however, no meanings have
         been assigned to date.

QRA What is the name of your The name of my station is...

QRB How far approximately are The approximate distance between our
you from my station? stations is...nautical miles (or...

QRC By what private enterprise (or The accounts for charges of my
State administration) are are settled by the private
accounts for charges for your enterprise...(or State admin-
station settled? istration).

QRD Where are you bound and where I am bound for...from...
are you from?

QRE What is your estimated time of My estimated time of arrival at...
arrival at...(or over...) (or over...) (place) is...hours.

QRF Are you returning to...(place)? I am returning to...(place).
        Return to...(place).

QRG Will you tell me my exact Your exact frequency (or that of...)
frequency (or that of...)? is...kHz (or MHz).

QRH Does my frequency vary? Your frequency varies.

QRI How is the tone of my The tone of your transmission is:
transmission? 1) good.
          2) variable.
          3) bad.

QRJ How many radiotelephone calls I have...radiotelephone calls to
have you to book? book.

QRK What is the intelligibility of The intelligibility of your signals
my signals (or those of...)? (or those of...) is...
          1) bad.
          2) poor.
          3) fair.
          4) good.
          5) excellent.

QRL Are you busy? I am busy (or I am busy with...)
        Please do not interfere.

QRM Are you being interfered with? I am being interfered with
          (1. nil
          2. slightly
          3. moderately
          4. severely
          5. extremely).

QRN Are you troubled by static? I am troubled by static
          (1. nil
          2. slightly
          3. moderately
          4. severely
          5. extremely).

QRO Shall I increase transmitter Increase transmitter power.

QRP Shall I decrease transmitter Decrease transmitter power.

QRQ Shall I send faster? Send faster (...words per minute).

QRR Are you ready for automatic I am ready for automatic operation.
operation? Send at...words per minute.

QRS Shall I send more slowly? Send more slowly (...words per

QRT Shall I stop sending? Stop sending.

QRU Have you anything for me? I have nothing for you.

QRV Are you ready? I am ready.

QRW Shall I inform...that you Please inform...that I am calling
are calling him on...kHz him on...kHz (or MHz).
(or MHz)?

QRX When will you call me again? I will call you again at...hours
(on...kHz (or MHz)). Must Wait. (or Wait until I have finished
I wait? communicating with ...)

QRY What is my turn? Your turn is number...(or according
(Relates to communication). to any other indication). (Relates
        to communication).

QRZ Who is calling me? You are being called by...(on...kHz
        or MHz)).

QSA What is the strength of my The strength of your signals (or
signals (or those of...)? those of...) is...
          1) scarcely perceptible.
          2) weak.
          3) fairly good.
          4) good.
          5) very good.

QSB Are my signals fading? Your signals are fading.

QSC Are you a cargo vessel? I am a cargo vessel.

QSD Is my keying defective? Your keying is defective.

QSE What is the estimated drift The estimated drift of the survival
of the survival craft? craft is...(figures & units).

QSF Have you effected rescue? I have effected rescue and am
        proceeding to...base (with...
        persons injured requiring

QSG Shall I send...telegrams at Send...telegrams at a time.
a time?

QSH Are you able to home on your I am able to home on my D/F
D/F equipment? equipment (on station...).

QSI Will you inform ... (callsign) I have been unable to break in on
that I have been unable to your transmission
break in on his transmission
(on...kHz (or MHz)?

QSJ What is the charge to be The charge to be collected to...
collected to...including including my internal telegraph
your internal telegraph charge is ...francs.

QSK Can you hear me between your I can hear you between my signals;
your signals and if so can I break in on my transmission.
break in on your transmission?

QSL Can you acknowledge receipt? I am acknowledging receipt.

QSM Shall I repeat the last telegram Repeat the last telegram which you
telegram which I sent to you (or sent me (or telegram(s) number(s)...)
previous telegram)?

QSN Did you hear me (or...(call- I did hear you (or...(callsign))
sign)) on...kHz (or MHz)? on...kHz (or MHz).

QSO Can you communicate with... I can communicate (or
direct or by relay? by relay through...).

QSP Will you relay of I will relay of charge.

QSQ Have you a doctor on board I have a doctor on board (or...
(or is...(name of person) on (name of person) is on board).

QSR Shall I repeat the call on Repeat your call on the calling
the calling frequency? frequency; did not hear you (or
        have interference).

QSS What working frequency will I will use the working frequency
you use? ...kHz (normally only the last
        three figures of the frequency
        need be given).

QST -unassigned-

QSU Shall I send or reply on this Send or reply on this frequency (or
frequency (or on...kHz (or MHz) on...kHz (or MHz)) (with emission of
(with emissions of class...)? class...).

QSV Shall I send a series of V's Send a series of V's on this freq-
on this frequency (or...kHz uency (or on...kHz (or MHz)).
(or MHz))?

QSW Will you send on this frequency I am going to send on this frequency
(or on...kHz (or MHz)) (with (or on...kHz (or MHz)) (with
emissions of class...? emissions of class...).

QSX Will you listen to...(call- I am listening to...(callsign(s))
sign(s)) on...kHz (or MHz)? on...kHz (or MHz).

QSY Shall I change to transmission Change to transmission on another
on another frequency? frequency (or on...kHz (or MHz)).

QSZ Shall I send each word or group Send each word or group twice (or...
more than once? times).

QTA Shall I cancel telegram Cancel telegram number...

QTB Do you agree with my counting I do not agree with your counting of
of words? words; I will repeat the first letter
        or digit of each word or group.

QTC How many telegrams have you to I have...telegrams for you (or
send? for...).

QTD What has the rescue vessel or ...(identification) has recovered...
rescue aircraft recovered? 1) ...(number) survivors.
          2) wreckage.
          3) ...(number) bodies.

QTE What is my TRUE bearing from Your TRUE bearing from me is...
you? degrees (at...hours).
         or or
What is my TRUE bearing from Your TRUE bearing from...(callsign)
...(callsign)? was...degrees (at...hours).
         or or
What is the TRUE bearing of The TRUE bearing of...(callsign)
...(callsign) from...(call- from...(callsign) was...degrees
sign)? at...hours.

QTF Will give me the position of The position of your station
my station according to the according to the bearings taken
bearings taken by the D/F by the D/F stations which I control
stations which you control? was...latitude...longitude (or other
        indication of position), class...

QTG Will you send two dashes of I am going to send two dashes of ten
ten seconds each followed by seconds each followed by my callsign
your callsign (repeated... (repeated...times) (on...kHz (or
times) (on...kHz (or MHz))? MHz).
    or or
Will you send two I have send two
dashes of ten seconds followed dashes of ten seconds followed by
by his callsign (repeated... his callsign (repeated...times) on
times) on...kHz (or MHz)? ...kHz (or MHz).

QTH What is your position in My position is...latitude...longitude
latitude and longitude (or (or according to any other
according to any other indication).

QTI What is your TRUE track? My TRUE track is...degrees.

QTJ What is your speed? My speed is...knots (or kilometres
        or statute miles per hour).
        (Indicates the speed of a ship or
        aircraft through the water or air

QTK What is the speed of your The speed of my aircraft in relation
aircraft in relation to the to the surface of the earth is...
surface of the earth? knots (or...kilometres or statute
miles per hour).

QTL What is your TRUE heading? My TRUE heading is...degrees.

QTM What is your MAGNETIC heading? My MAGNETIC heading is...degrees.

QTN At what time did you depart I departed from...(place) at...
from...(place)? hours.

QTO Are you airborne? I am airborne.
         or or
Have you left dock (or port)? I have left dock (or port).

QTP Are you going to alight (or I am going to alight (or land).
    or or
Are you going to enter dock I am going to enter dock (or port).
(or port)?

QTQ Can you communicate with my I am going to communciate with your
station by means of the station by means of the international
international code of signals? code of signals.

QTR What is the correct time? The correct time is...hours.

QTS Will you send your callsign I will send my callsign for tuning
for tuning purposes or so purposes or so that my frequency may
that your frequency can be be measured now (or at...hours) on...
measured now (or at...hours) kHz (or MHz).
on...kHz (or MHz)?

QTT The identification signal which
        follows is superimposed on another

QTU What are the hours during which My station is open
your station is open?

QTV Shall I stand guard for you on Stand guard for me on the frequency
the frequency of...kHz (or MHz) of...kHz (or MHz) (
( hours).

QTW What is the condition of Survivors are in...condition and
survivors? urgently need...

QTX Will you keep your station open I will keep my station open for
for further communciation with further communcation with you
me until further notice (or until further notice (or until...
until...hours)? hours).

QTY Are you proceeding to the I am proceeding to the position of
position of incident and if so the incident and expect to arrive
when do you expect to arrive? at...hours (

QTZ Are you continuing the search? I am continuing the search for...
        (aircraft, ship, survival craft,
        survivors or wreckage).

QUA Have you news of...(callsign)? Here is news of...(callsign).

QUB Can you give me, in the Here is the information requested...
following order, information
concerning: the direction in
degrees TRUE and speed of the
surface wind; (The units used
for speed and distances should
be indicated), present weather,
visibility, and amount, type and
height of base of cloud above
surface elevation at...
(place of observation)?

QUC What is the number (or other The number (or other indication) of
indication) of the last the last message I received from you
message you received from me (or from...(callsign) is...
(or from...(callsign))?

QUD Have you received the urgency I have received the urgency signal
signal sent by...(callsign of sent by...(callsign of mobile
mobile station)? station) at...hours.

QUE Can you use telephony in... I can use telephony in...(language)
(language), with interpreter on...kHz (or MHz).
if necessary; if so, on what

QUF Have you received the distress I have received the distress signal
signal sent by...(callsign of sent by...(callsign of mobile
mobile station)? station) at...hours.

QUG Will you be forced to alight I am forced to alight (or land)
(or land)? immediately.
        I will be forced to alight (or land)
        at...(position or place) at...hours.

QUH Will you give me the present The present barometric pressure at
barometric pressure at sea sea level is...(units).

Aeronautical Note:
Stations of the international aeronautical telecommunications service
will interpret this signal as:

What is the present atmospheric The present atmospheric pressure at
pressure at... ...(place or position) at...hours
(place or position)? is...(figures & units).

QUI Are your navigation lights My navigation lights are working.

QUJ Will you indicate the TRUE The TRUE track to reach me (or...)
track to reach you (or...)? is...degrees at...hours.

QUK Can you tell me the condition The sea at...(place of co-ordinates)
of the sea observed at... is...
(place or co-ordinates)?

Aeronautical Note: Stations of the international aeronautical tele-
communications service will complete the answer, information or advice
form by the use of a numbered alternative as given hereunder, selected
according to the average wave height as obtained from the larger
well-formed waves of the wave system being observed. If observed height
coincides with one of the limits, report the lower numbered alternative,
e.g. waves with a mean maximum height of 4 metres are to be reported
as "5".

         Number Metres Feet (approx)
         0 Calm-glassy 0 0
         1 Calm-rippled 0-0.1 0-1/3
         2 Smooth wavelets 0.1-0.5 1/3-1 2/3
         3 Slight 0.5-1.25 1 2/3-4
         4 Moderate 1.25-2.5 4-8
         5 Rough 2.5-4 8-13
         6 Very rough 4-6 13-20
         7 High 6-9 20-30
         8 Very high 9-14 30-45
         9 Phenomenal Over 14 Over 45

QUL Can you tell me the swell The swell at...(place or co-ordin-
observed at...(place or ates) is...

Aeronautical Note: Stations of the international aeronautical tele-
communications service will complete the answer, information or advice
form by the use of the following numbered alternatives:

Number Length of Swell Height Number Length of Swell Height
0 - - 5 Long Moderate
1 Short or average Low 6 Short Heavy
2 Long Low 7 Average Heavy
3 Short Moderate 8 Long Heavy
4 Average Moderate 9 Confused -

Additionally, stations of the international aeronautical
telecommunication service may indicate the direction of swell by the
use of the appropriate cardinal or quadrantal point abbreviation N,
NE, E, SE, etc. following the numbered alternate for indicating swell
condition. The descriptions in the above numbered alternatives are
as follows:

        Length of Swell
      Metres Feet (approx)
Short = 0-100 0-300
Average = 100-200 300-600
Long = Over 200 Over 600

        Height of Swell
      Metres Feet (approx)
Low = 0-2 0-7
Moderate = 2-4 7-13
Heavy = Over 4 Over 13

When there is no swell, the numbered alternative "0" is used;
when the swell is such that the length and height of the swell waves
cannot be determined, the numbered alternative "9" is used.

QUM May I resume normal working? Normal working may be resumed.
         or or
Is the distress traffic ended? The distress traffic is ended.

QUN Will vessels in my immediate My position, TRUE course and
vicinity (or in the vicinity speed are...
of...latitude...longitude (or
of...)) please indicate their
position, TRUE course and

Aeronautical Notes:
a) All stations of the international aeronautical telecommunication
service will interpret this signal (in part) as referring to

b) English-speaking stations of the maritime mobile service
may interpret this signal (in part) as referring to TRUE HEADING.
When communicating with such stations it is recommended that supple-
mentary use be made of the signal QTI to avoid any misunderstanding.

QUO Shall I search for... Please search for...
1) aircraft, 1) aircraft,
2) ship, 2) ship,
3) survival craft, 3) survival craft
in the vicinity of... in the vicinity of...latitude
latitude...longitude (or ...longitude (or according to
according to any other any other indication).

QUP Will you indicate your My position is indicated by...
position by... 1) searchlight.
1) searchlight? 2) black smoke trail.
2) black smoke trail? 3) pyrotechnic lights.
3) pyrotechnic lights?

QUQ Shall I train my searchlight Please train your searchlight on a
nearly vertical on a cloud, cloud, occulting if possible and,
occulting if possible and, if my aircraft is seen or heard,
if your aircraft is seen or deflect the beam up wind and on the
heard, deflect the beam up water (or land) to facilitate my
wind and on the water (or landing.
land) to facilitate your

QUR Have survivors... Survivors...
1) received survival 1) are in possession of survival
equipment? equipment dropped by...
2) been picked up by 2) have been picked up by rescue
rescue vessel? vessel.
3) been reached by ground 3) have been reached by ground
rescue party? rescue party.

QUS Have you sighted survivors or Have sighted...
wreckage? 1) survivors in water,
If so, in what position? 2) survivors on rafts,
          3) wreckage,
        in position...latitude...longitude
        (or according to any other indication).

QUT Is position of incident Position of incident is marked by...
marked? 1) flame or smoke float.
          2) sea marker.
          3) sea marker dye.
          4) ...(specify other marking).

QUU Shall I home ship or aircraft Home ship or aircraft...(callsign)
to my position? ...
          1) to your position by trans-
          mitting your callsign and
          long dashes on...kHz (or MHz).
          2) by transmitting on...kHz
          (or MHz) TRUE track to reach you.

QUV What is my MAGNETIC bearing Your MAGNETIC bearing from me
from you (or from...)? (or from...) was...degrees at...
(This signal, in general, hours. (This signal, in general,
will not be used in the will not be used in the maritime
maritime mobile service.) mobile service.)

Aeronautical notes:
a) When using QDL QUV procedure in the international aeronautical
telecommunication service, completion of the "hours" blank
space is not required.
b) In communications between stations of the aeronautical mobile
service the signal QDR will be used instead of QUV.

QUW Are you in the search area I am in the...(designation) search
designated as...(designator area.
or latitude & longitude)?

QUX Will you indicate the MAGNETIC The MAGNETIC course* for you to
course* for me to steer towards steer to reach me (or...) with no
you (or...) with no wind? wind was...degrees at...hours.
(This signal, in general, hours. (This signal, in general,
will not be used in the will not be used in the maritime
maritime mobile service.) mobile service.)

Aeronautical notes:
a) All stations of the international aeronautical tele-
communication service will interpret "course" as referring
to "heading".
b) When using QDL QUV procedure in the international aeronautical
telecommunication service, completion of the "hours" blank
space is not required.
c) In communications between stations of the aeronautical mobile
service the signal QDR will be used instead of QUV.

QUY Is position of survival craft Position of survival craft was
marked? marked at...hours by...
          1) flame or smoke float.
          2) sea marker.
          3) sea marker dye.
          4)....(specify other marking)

QVA to QZZ The series QVA-QZZ inclusive has not been allocated to date


Signal Question Answer, advice or order

ZAA You are not observing proper
        circuit discipline.

ZAB Your speed key is improperly

ZAC Cease using speed key.

ZAD Your operating signal (made at
        ...) received as ...
          (1. Not understood
          2. Not held.)

ZAE I am unable to receive you.
        Receipt through...

ZAF Will you patch me through I am about to patch you through
to...(via you or...)? to...(via...)

    Army Z Signals
    Ralph Kennedy

Question Answer, Advice or Order

ZAA You are not observing proper circuit

ZAB Your speed key is improperly

ZAC Cease using speed key.

ZAD Your operating signal (made at...)
        received as...(1. Not understood;
        2. Not held).

ZAE I am unable to receive you.
        Receipt through...

ZAF Will you patch me through I am about to patch you through
to...(via you or...)? to...(via...).

ZAG Break...(1. Go ahead with next tape;
        2. Go back...feet; 3. Advance your
        key tape to reference mark number
        and repeat last transmission (or

ZAH Unable to relay present
        form. We file. Transmit correctly
        prepared tape under new number to
        all addressees (or to...).

ZAI Run...(1. Caller; 2. Test tape;
        3. Synchronising tape; 4. Traffic
        tape; 5. Marking signals; 6. Spacing
        signals; 7. Reversals; 8. Run tele-
        typewriter space bar signals).

ZAJ I have (or...has) been unable to
        break you.

ZAK Transmission on...kHz (or MHz)
        suspended until...(or was suspend-
        ed at...) on account of electrical
        hazards (or...)

ZAL I am closing down (until...) due

ZAM I am unable to obtain reply from
        teleprinter switchboard...(for
        connection to...). Request you call
        him (or other intermediate switch-
        board) for me.

ZAN Transmit only messages of and above

      - Page 1 -

Question: Answer, Advice or Order:

ZAO I cannot understand your speech.
        Use radiotelegraph.

ZAP Shall I work...(1. Simplex; Work...(1. Simplex; 2. Duplex;
2. Duplex; 3. Diplex; 3. Diplex; 4. Multiplex;
4. Multiplex; 5. Single 5. Single Sideband; 6. With auto-
Sideband; 6. With automatic matic error correction system;
error correction system; 7. Without automatic error correct-
7. Without automatic error ion system.
correction system)?

ZAQ The last word (or group)... (1. Re-
        ceived from you was...; 2. Trans-
        mitted to you was...)

ZAR This is my...request (or reply).
        (1. First; 2. Second; 3. Third; etc.)

ZAS Rerun all tapes run on...since...
        (1. Your present frequency; 2....kHz
        (or MHz); 3. Callsign...; 4. This

ZAT Am preparing traffic (perforating
        tape) for transmission.

ZAU What is the teletype range of Teletype range taken on your
my signal(s)? signal(s)

ZAV Transmit traffic for me (or for...)
        by broadcast method until further
        directed (or until...).

ZAW Shall I transmit 12 inches of Transmit 12 inches of blank tape at
blank tape at short intervals short intervals at...words per
at...words per minute? minute.

ZAX You are...(1. Causing interference.
        Listen before sending. 2. Causing
        interference by inattention to order
        to wait; 3. Sending at the same time
        as...(callsign); 4. Causing delay by
        slowness in answering. 5. Causing
        delay by slowness in answering my
        service or procedure messages;
        6. Answering out of turn).

ZAY Transmit traffic to me (or to...
        on...kHz (or MHz) without waiting
        for receipts. I (or...) will receipt
        your traffic later (on...kHz)
        (or MHz)).

ZAZ One or more transmitters, simul-
        taneously keying on this broadcast,
        are defective but transmission will
        continue on remaining transmitters.
        Traffic so transmitted will be re-
        peated when full service is

      - Page 2 -

Question: Answer, Advice or Order:

ZBA What is the cause of delay Delay (or bad transmission) due
(or of bad transmission)? to...

ZBB For following message you will
        require a total of...copies.

ZBC You are transmitting a continuous
        (1. Mark; 2. Space).

ZBD Will you repeat what you Following is what I (or...) sent
(or...) sent (at...)? (at...).

ZBE Retransmit (for...)
        (1. Action; 2. Information).

ZBF For following message use large
        message forms.

ZBG You are transmitting in upper case.

ZBH Make preliminary call before trans-
        mitting traffic.

ZBI Listen for radiotelephony.

ZBJ -unassigned-

ZBK Are you receiving my traffic I am receiving your traffic...
clear? (1. Clear; 2. Garbled).

ZBL I am unable to receive you while I
        am transmitting. Do not use break-
        in procedure.

ZBM Place...on watch on this frequency.
        (1. A qualified speed key operator;
        (2. A competent operator).

ZBN reversed. (1. Tape;
        2. Mark & Space).

ZBO Of what precedence(s)? I have (or...has)...(numeral follow-
        ed by precedence prosign for each
        precedence) message(s) for you
        (or for...).

ZBP Your...(1. Characters are indistinct;
        2. Spacing is bad).

ZBQ When and on what frequency Message...was received at...on...
was message...received? kHz (or MHz).

ZBR Shall I send by... Send by...(1. Direct (R) method;
(1. Direct (R) method; 2. 2. Broadcast (F) method; 3. Int-
Broadcast (F) method; ercept (I) method; 4. Repeat back
3. Intercept (I) method; (G) method.
4. Repeat back (G) method)?

      - Page 3 -

Question: Answer, Advice or Order:

ZBS Your...(1. Dots are too heavy; 2.
        Dots are too light; 3. Dots are
        varying in bias; 4. Dot spacing is
        bad.; 5. Dots are missing; 6. Dots
        are burring).

ZBT How do you count following Text group(s) should be counted
text group(s)...?

ZBU Report when you are in radio
        communication with...

ZBV Answer me (or...) on...kHz (or MHz).

ZBW Will you shift (or I am (or...) is shifting to transmit
shift) to transmit on...kHz on...kHz (or MHz).
(or MHz).

ZBX Will you shift (or I am (or...) is shifting to receive
shift) to receive on...kHz on...kHz (or MHz).
(or MHz).

ZBY Pass...(1. On boradcast...;
        2. On broadcast...single
        operator; 3. On broadcast...
        two operator period; 4. On
        broadcast...general periods

ZBZ What is the printing accuracy The printing accuracy of your signals
of my signals (or those of...)? (or those of...) is...(1. Totally
        corrupt; 2. Very corrupt; 3. Partly
        corrupt rendering traffic unaccept-
        able; 4. Occasionally corrupt but
        traffic acceptable; 5. Perfect - no

ZCA -unassigned-

ZCB -unassigned-

ZCD -unassigned-

ZCD -unassigned-

ZCE -unassigned-

ZCF -unassigned-

ZCG -unassigned-

ZCH -unassigned-

ZCI -unassigned-

ZCJ -unassigned-

ZCK -unassigned-

ZCL -unassigned-

      - Page 4 -

Question: Answer, Advice or Order:

ZCM -unassigned-

ZCN -unassigned-

ZCO -unassigned-

ZCP -unassigned-

ZCQ -unassigned-

ZCR -unassigned-

ZCS -unassigned-

ZCT -unassigned-

ZCU -unassigned-

ZCV -unassigned-

ZCW -unassigned-

ZCX -unassigned-

ZCY -unassigned-

ZCZ -unassigned-

ZDA I have a formal message for you.
        (precedence is...).

ZDB Expedite reply(ies) to my...(1.
        Previous operating signal; 2.
        Request(s) for repetition and
        correction; 3. Service message...).

ZDC Does the last message (or Last message (or message...)
message...) require a signal requires a signal of execution.
of execution?

ZDD Bring the circuit.

ZDE Message...undelivered...(1. Will
        continue efforts to effect
        disposal; 2. Advise disposition;
        3. Will not continue further
        efforts. Request cancel and file;
        4. Give more complete address.

      - Page 5 -

Question: Answer, Advice or Order:

ZDF Message...was received by...
        (addressee designation) at...Z or
        was (1. Received by action address-
        ee(s) at...Z; 2. Received by info-
        rmation addressee(s) at...Z;
        3. Received by all addressees at...Z;
        4. Received by action addressee(s)
        message centre at...Z; 5. Received by
        information addressee(s) message
        centre at...Z; 6. Received by all
        addressees' message centre at...Z;
        7. Delivered by broadcast at...Z;
        8. Forwarded by commercial means
        at...Z; 9. Mailed at...Z).

ZDG Accuracy of following message(s)
        (or message...) is doubtful.
        Correction or confirmation will be

ZDH Request corrected copy of message be
        forwarded to...

ZDI Place this message (or message...)
        on (1. MERCAST; 2. MERCAST one
        operator period).

ZDJ How many groups does your I have a message containing...groups
message contain? to transmit to you (or to...).

ZDK Will you repeat message...(or Following repetition (of...) is made
portion...) (or will you rerun in accordance with your request.

ZDL Confirmation...(1. Was omitted;
        2. Differs from text).

ZDM I am holding your message...

ZDN Report disposal of message...your
        your station with any reason for

ZDO I could not send

ZDP Hold my message...until correctness
        is confirmed.

ZDQ Message...was relayed
        by...(on...kHz (or MHz)).

ZDR This is a multiple-address or book
        message tape containing...routeing
        indicators in the routing line which
        is to be routed in accordance with
        the established doctrine.

      - Page 6 -

Question: Answer, Advice or
Order: portion...) is...

ZDS Message (or message...) which you
        have (or...has) just forwarded was
        incorrectly transmitted. Correct
        version of message (or part or

ZDT Exercise messages are not to be sent
        until further orders (or until...).

ZDU Pass the following...(1. Private
        message (telegram); 2. Service
        telegram...) (Number of words charged
        for is...).

ZDV Private message (telegram) received
        for...Request instructions.

ZDW In addition to the regular broadcast
        times, this hydrographic message is
        to be transmitted on the following
        hydrographic schedules...
        (1...schedule; 2. All schedules on...
        (date); 3. All schedules
        (dates inclusive)).

ZDX Messages up to and including serial
        (or circuit) number...have been
        previously transmitted.

ZDY Private messages (telegrams) are not
        to be sent until further orders. (or

ZDZ On...(date) message(s) was (were)
        mailed to...(command(s)) bearing
        serial numbers...

ZEA Pass plain language copy
        by secure means.

ZEB This is a reprocessed ICAO message.

ZEC Have you received message...? Message...(1. Not received; 2.Unid-
        entified. Give better identifying

ZED The following confirmatory inform-
        ation as received is at variance
        with the text.

ZEE Request transmitted.

ZEF This message has been read (received
        or intercepted) from a ship at sea.

ZEG This message is not to be decrypted
        or reported outside the communication
        centre in...(1. Agressor force;
        2. Friendly force).

      - Page 7 -

Question: Answer, Advice or
Order: portion...) is...

ZEH Accuracy of...portion of following
        message (or message...) is doubtful.
        Correction or confirmation will be
        forwarded when received.

ZEI Accuracy is doubtful of heading of
        message received as follows...Check
        to station of origin if necessary
        and repeat.

ZEJ Replies to this message (or
        message...) are to be sent now (or

ZEK No answer is required.

ZEL Is message...a correction to This message is a correction (to
message...which was previously message...) (transmitted to...)
transmitted with doubtful or Note: May only be used in conjun-
missing groups (words)? ction with ZDG.

ZEM -unassigned-

ZEN This message has been delivered by a
        separate transmission or by other
        means (1. Messenger/courier;
        2. Mail) to the addressee(s)
        immediately following this operating

ZEO Transmit this message by rapid means
        when no charges are involved and to
        all others by mail.

ZEP This message (or message...) was
        was incompletely received. Each word
        or group missed, which is indicated
        by position of ZEP in the message,
        will be forwarded as soon as

ZEQ Your message...has been missent to
        this station...(1. Request you re-
        transmit to correct addressee;
        2. I will retransmit to correct

ZER This is a multiple-address or book
        message tape containing...routeing
        indicators in the routing line for
        which the station called in the
        pilot is responsible.

ZES Your message...has been received...
        (1 Incomplete; 2. Garbled). Request

ZET Message has been protected and no
        further action required.

      - Page 8 -

Question: Answer, Advice or Order:

ZEU Exercise (drill) message.

ZEV Request you acknowledge Message (or message...) is
message... acknowledged.

ZEW Your attention is invited, for...
        (1. Action; 2. Information) to
        message...which is in your files.

ZEX This is a book message and may be
        delivered as a single-address
        message to addressees for whom you
        are responsible.

ZEY This message (or message...) has
        been (or will be) put on the...
        broadcast schedules (serial

ZEZ When delivery is effected of this
        book message to addressee by comm-
        ercial means, or when copy is
        forwareded to confirm message pre-
        viously delivered by telephone, it
        is to be sent as a single address
        message. (May only be used in
        conjunction with ZEX).

ZFA Following message has been read
        (received or intercepted).

ZFB Pass this message to...(1. On
        arrival; 2. On return to base)

ZFC Have you received (or sent) Executive signal ("Execute") for last
the executive signal message (or following message) has
("Execute") for message... been made (or was made at...).

ZFD This message is a suspected duplicate.

ZFE Pass message...(which is in your
        files) to addressee(s) for whom you
        are responsible using the indicated
        supplementary heading.

ZFF Inform me when this message (or
        message...) has been received by...
        (addressee designation) or by...
        (1. Action addressee(s); 2. Inform-
        ation addressee(s); 3. All address-
        ee(s); 4. Action addressee's/
        addressees' message centre; 5. Inform
        -ation addressee's/addressees'
        message centre; 6. All addressees'
        message centre).

ZFG This message is an exact duplicate of
        a message previously transmitted.

      - Page 9 -

Question: Answer, Advice or Order:

ZFH This message (or message...) is being
        (or has been) passed to you (or..)
        for...(1. Action; 2. Information;
        3. Comment) (at the request of...)

ZFI Is there any reply to There is no reply to message.

ZFJ Message(s)...number(s)...not trans-
        mitted on this schedule (or on
        schedule...) are no longer needed.

ZFK Does message...(or station Message...(or station serial number
serial number...) concern me ...)...(1. Does not concern you
(or...)? (or...); 2. No longer concerns you

ZFL Was there any traffic addressed Following traffic was addressed to
to me on...broadcast schedule you on...broadcast schedule between
between serial numbers... serial numbers...and...

ZFM Message(s) serial number(s)...(to
        ...) which was (were) transmitted
        during unserviceability of one or
        more transmitters, simultaneously
        keyed, will now be repeated.

ZFN -unassigned-

ZFO being delivered as a
        basegram message.

ZFP Basegram.

ZFQ Two messages (...and...) received
        under channel number (or station
        serial number)... Both released.

ZFR Cancel transmission...(made under
        channel or station serial number...).

ZFS Make message...same channel or
        station serial number as this
        procedure message.

ZFT Message...received without channel
        number (or station serial number)
        following message bearing channel
        number (or station serial number)...
        Both released.

ZFU Channel numbers...and...preceeded
        message... Lower number recorded
        and higher number blanked.

      - Page 10 -

Question: Answer, Advice or Order:

ZFV Message...containing channel number
        ...separated by portions of the
        message, released subject to
        correction. Take necessary action
        to provide corrected copy.

ZFW BLANK channel number(s)...Forward channel number...

ZFX Channel number (or station serial
        number) open.

ZFY -unassigned-

ZFZ -unassigned-

ZGA What is my callsign for Your callsign for use on this
use on this circuit only? circuit only is...

ZGB Send (answer)...(1. In alphabetical
        sequence of callsigns. Each station
        to make its callsigns once (or...
        times); 2. In the following sequence
        of callsigns).

ZGC -unassigned-

ZGD Two stations are using the same
        indefinite callsign on...kHz (or
        MHz). Both stations are to select
        different callsigns.

ZGE Send your callsign(s) once (or...
        times) on this frequency (or on
        ...kHz (or MHz)).

ZGF Make callsigns more distinctly.

ZGG What is callsign of... Callsign Friendly
(1. Friendly striking force striking force aircraft; 2. Friend-
aircraft; 2. Friendly shadow- shadowing aircraft; 3. Incoming
ing aircraft; 3. Incoming vessel; 4. Senior officer present
vessel; 4. Senior officer afloat (or Officer in tactical
present afloat (or Officer in command); 5. Ship acting as flag-
tacticl command); 5. Ship ship for...).
acting as flagship for...)?

ZGH I am using this transmitter to answer
        calls on two or more frequencies.
        Answer to calls may be delayed.

ZGI I am or have been ( or has
        been) calling you (on...kHz (or

ZGJ When will you call me again I will call you again as soon as
on present frequency (or on possible (or at...) on present
...kHz (or MHz))? frequency (or on...kHz (or MHz)).

      - Page 11 -

Question: Answer, Advice or Order:

ZGK When shall I call you again Call me again at...on present
on present frequency (or on frequency (or on...kHz (or MHz)).
...kHz (or MHz))?

ZGL ...will answer calls for me (or

ZGM Did you (or...) I have (or...has) been unable to
        communicate with...(since...).

ZGN When was I (or...) last heard? Nothing heard from you (or...)

ZGO What is my number and sequence Your number is... Answer after
of answering? number... (Numbers are to be
        separated by separative sign).

ZGP Answer calls for me on present
        frequency (or on...kHz (or MHz)).

ZGQ -unassigned-

ZGR -unassigned-

ZGS -unassigned-

ZGT -unassigned-

ZGU -unassigned-

ZGV -unassigned-

ZGW -unassigned-

ZGX -unassigned-

ZGY -unassigned-

ZGZ -unassigned-

ZHA Shall I decrease frequency Decrease frequency very slightly (or
very slightly (or...kHz) ...kHz) to clear interference.
to clear interference?

ZHB Shall I increase frequency Increase frequency very slightly (or
very slightly (or...kHz) ...kHz) to clear interference.
to clear interference?

ZHC -unassigned-

ZHD -unassigned-

ZHE -unassigned-

ZHF -unassigned-

ZHG -unassigned-

ZHH -unassigned-

      - Page 12 -

Question: Answer, Advice or Order:

ZHI -unassigned-

ZHJ -unassigned-

ZHK -unassigned-

ZHL -unassigned-

ZHM -unassigned-

ZHN How do you receive my Your automatic transmissions are...
automatic transmission? (1. Good; 2. Fair; 3. Unreadable).

ZHO What is your speed of auto- My speed of automatic transmission
matic transmission? in...(1. Revolutions per minute;
        2. Words per minute; 3. Bauds) is...

ZHP What is preventing automatic Automatic reception is prevented by
reception? ...

ZHQ Please listen for me on...kHz (or
        MHz) and transmit to me on...kHz
        (or MHz).

ZHR Is my speed of automatic Your speed of automatic transmission
transmission correct? is...(1. Fast; 2. Slow; 3. Erratic;
        4. Correct).

ZHS -unassigned-

ZHT -unassigned-

ZHU -unassigned-

ZHV -unassigned-

ZHW -unassigned-

ZHX -unassigned-

ZHY -unassigned-

ZHZ -unassigned-

ZIA This message (or message...) is
        being (or has been) passed out of
        proper sequence of station serial

ZIB Two messages...and... (or Change station serial number of
group counts and time of read number...OR
origin...and...), both Assign to message...station serial
received as serial number... number...
What are correct serial

ZIC What is (are) station serial Station serial number(s) or channel
number(s) or channel number(s) number(s) of last message(s) trans-
of last message(s) you trans- mitted to you (or to...) is (are)...
mitted to me (or to...)?

      - Page 13 -

Question: Answer, Advice or Order:

ZID What is (are) station serial Station serial number(s) or channel
number(s) or channel number(s) number(s) of last message(s) received
of last message(s) received from you (or from...) is (are)...
from me (or from...)?

ZIE Station serial number(s) or channel
        number(s) (from...) has (have) not
        been received. Repeat message(s) or
        cancel serial number(s) or channel

ZIF I (or...) did not use serial

ZIG Is (are) number(s)... (to...) Number(s)...(to...) is (are) blank.

ZIH Repeat headings of message number by you (or...)
        to check serial numbers.

ZII What was...of your (or...'s) My (or...'s) number...had following
number...? (1. Date-time group; ...(1. Date-time group; 2. Filing
2. Filing time)? time).

ZIJ I am now changing my channel number/
        letter. Last number sent in this
        series is that of this message.

ZIK This is a weather controlled message
        which is not to be transmitted in the
        clear over radio circuits.

ZIL -unassigned-

ZIM -unassigned-

ZIN -unassigned-

ZIO -unassigned-

ZIP Have set continuous watch, or (1.
        Single operator period; 2. Two
        operator period; 3. General periods
        only; 4. Reduced single operator
        periods) on broadcast indicated.
        First serial number received is...
        /No number yet received.

ZIQ -unassigned-

ZIR -unassigned-

ZIS -unassigned-

ZIT -unassigned-

ZIU -unassigned-

ZIV -unassigned-

      - Page 14 -

Question: Answer, Advice or Order:

ZIW -unassigned-

ZIX -unassigned-

ZIY -unassigned-

ZIZ -unassigned-

ZJA Read signalling light of...

ZJB May I close down visual Close down visual watch now (or
watch now (or at...)? at...).

ZJC Repeat all flag signals made by the
        senior officer (senior officer
        present afloat).

ZJD Use...(1. Better light; 2. Better

ZJE Set visual watch now (or at...).

ZJF Visual relaying station between
        senior officer (senior officer
        present afloat) (or...) and...
        is to be...

ZJG Repeat all flashing (or semaphore)
        messages made by the senior officer
        (senior officer afloat).

ZJH Your light is unreadable...(1. Not
        trained correctly; 2. Not bright
        enough; 3. Too bright).

ZJI What are the callsigns of the Callsigns of teh ships in company
ships in company with you? with me are...(For visual use only).

ZJJ Use double-flash procedure.

ZJK Are you (or is...) visual I am ( visual guard for...
guard for...?

ZJL Hoist the following signal.

ZJM ...(1. Flaghoist; 2. Semaphore;
        3. 20-inch signalling projector;
        4. 10-inch signalling projector;
        5. ALDIS; 6. Intermediate;
        7. Heather; 8. Daylight signalling
        lantern; 9. Masthead flashing light;
        10. Infrared; 11. Signal searchlight;
        12. Omnidirectional flashing light;
        13. Directional flashing light)

ZJN Message...has been passed to those
        for whom I am responsible (or to...)
        (at...) but "L" has not been

      - Page 15 -

Question: Answer, Advice or Order:

ZJO Repeat back each group of the text
        of this message as it is transmitted.

ZJP Message which follows is to be
        encrypted and passed to all
        addressees (by...). (Only to be used
        by visual not liable to inter-

ZJQ Repeat signal (or message...) the
        senior officer (senior officer
        present afloat) (or ship indicated)
        is now transmitting or is about to

ZJR Only semaphore is to be used for
        visual signalling between...and
        ...(or from...).

ZJS Directional lights of minimum
        brillance are to be used for all
        visual traffic between...and...
        except for messages of precedence
        priority and above requiring
        transmission to two or more ships.

ZJT Broadcast transmitter indicated is
        about to be taken off for...minutes
        (or until...).

ZJU -unassigned-

ZJV -unassigned-

ZJW -unassigned-

ZJX -unassigned-

ZJY -unassigned-

ZJZ -unassigned-

ZKA Who is controlling station I am ( controlling station
(net control station) on (net control station) on this
this frequency (or on... frequency (or on...kHz (or MHz)).
kHz (or MHz))?

ZKB Is it necessary to obtain the It is necessary to obtain the
permission of the controlling permission of the controlling
station (net control station) station (net control station)
before transmitting messages? before transmitting messages.

ZKC Substitute code sign (callsign) of
        of control station of group (net)
        in place of this operating signal.

ZKD Shall I take control of net Take control of the net (for...)
(for...) (until...)? (until...).

      - Page 16 -

Question: Answer, Advice or Order:

ZKF Station leaves net temporarily (or
        for...minutes) (to communicate
        with...) (will be on...kHz (or

ZKG Observe (or obeserve)
        schedule with...on...kHz (or MHz)

ZKH Did you (or...) observe I (or...) observed schedule with
schedule ...(at...).

ZKI Set watch on...kHz (or MHz)...
        (1. Continuous; 2. Until further

ZKJ May I close down (until...)? ...(1. Close down (until...);
        2. I am closing down (until...))

ZKK Assume radiotelegraph (wireless)
        organisation...forthwith (or at...)

ZKL Resume normal radio communication
        now (or at...).

ZKM Take guard (for...) (on...kHz (or

ZKN I have taken over guard on...kHz (or

ZKO I have handed over guard (to...) (on
        ...kHz (or MHz)). (Serial number of
        last message received was...

ZKP Are you (or is...) radio guard I am ( radio guard for...
for... (on...kHz (or MHz))? (on...kHz (or MHz)).

ZKQ Indicate ships or stations for which
        you are ( guard. (1. Radio
        (on...kHz (or MHz)); 2. Visual).

ZKR On what frequencies are you I am ( maintaining watch on
(or...) maintaining watch? ...kHz (or MHz)).

ZKS What stations are keeping Following stations are keeping watch
watch on...kHz (or MHz) (or on...kHz (or MHz) (or are in net).
are in net)?

ZKT Am keeping watch on...kHz (or MHz)
        for...(1. First five minutes in each
        half hour; 2. From 10 to 15 and 40
        to 45 minutes past the hour;
        3. Between...and...minutes past
        the hour).

      - Page 17 -

Question: Answer, Advice or Order:

ZKU I am ( maintaining continuous
        watch, or (1. Single operator period;
        2. Two operator period; 3. General
        periods only; 4. Reduced single-
        operator period) on...(callsign)...

ZKV I am ( standing splitphone
        watch on...and...kHz (or MHz).

ZKW -unassigned-

ZKX -unassigned-

ZKY -unassigned-

ZKZ -unassigned-

ZLA I have pictures of the following
        types to tranmsit...(1. Photo-
        graphs; 2. Weather maps; 3. Blue-
        prints; 4. Printed matter; 5. Test).

ZLB What drum rotation speed Transmit at...revolutions per minute.
shall I use? (1. 30; 2. 45; 3. 50; 4. 60; 5. 90;
        6. 100)

ZLC Your transmission...(1. Shows object-
        ional modulation; 2. Suitable for
        communication but not for picture;
        3. Shows caption too close to edge of
        picture; 4. Shows buckled print;
        5. Shows fork drift; 6. Picture shows
        too much contrast; 7. Picture shows
        insufficient contrast; 8. Picture
        shows cross-over).

ZLD I am unable to...(1. Sychronise with
        you; 2. Transmit pictures; 3. Copy

ZLE Send...(1.Fence; 2. White; 3. Black;
        4. Picture; 5. Synchronise; 6. Fence
        swinging black; 7. Fence swinging
        white until I stop you).

ZLF ...(1. Inverter; 2. Converter; 3. 96-
        line 12 x 18 transceiver; 4. 100-
        line transceiver; 5. 300-line trans-

ZLG Shall I transmit (1. Negative; Transmit...(1. Negative;
2. Positive)? 2. Positive).

ZLH Will you transmit map(s)... I am going to transmit mpa(s)...
(...area...time...type)? (...area...time...type).

ZLI Reverse material on drum and re-run
        until I break you.

      - Page 18 -

Question: Answer, Advice or Order:

ZLJ What size lettering shall Use...(1. Standard telegraphic type-
I use? writer; 2. Jumbo typewriter (if
        available; 3. Hand lettering at least
        3/16 of an inch high).

ZLK -unassigned-

ZLL -unassigned-

ZLM -unassigned-

ZLN Facility indicated cannot be operated
        at present.

ZLO Is (are) facility(ies)... The following...facility(ies) is
operative at your station (are) operative at this station (or
(or at...)? at...). 1. Homing beacon; 2. Radar
        beacon; 3. Revolving and/or flashing
        beacon; 4. Radio beacon;
        5. Instrument landing system;
        6. Ground control approach;
        7. Approach control; 8. Tower
        transmitter (state which type LF, MF
        VHF or UHF); 9. MF direction finder;
        10. VHF direction finder; 11. UHF
        direction finder; 12. Runway lights;
        13. Sandra lights; 14. Radio track
        guide; 15. Radio range).

ZLP What is (are) the magnetic The magnetic line(s) of shoot of the
line(s) of shoot of the... ...(facility) is (are)... degrees.

ZLQ -unassigned-

ZLR -unassigned-

ZLS -unassigned-

ZLT -unassigned-

ZLU -unassigned-

ZLV -unassigned-

ZLW -unassigned-

ZLX -unassigned-

ZLY -unassigned-

ZLZ -unassigned-

ZMA What was bearing of unknown Bearing of unknown station (or
station (or station using station using callsign...) was...
callsign...) at...(time) (at...time) class...(on...kHz
(on...kHz (or MHz))? (or MHz)).

      - Page 19 -

Question: Answer, Advice or Order:

ZMB Bearing of you (or of...) was...
        (class...) from me (or from...)

ZMC Bearing of station which answered
        message (or transmission) from...
        was...(at...(time)) class...(on
        ...kHz (or MHz)).

ZMD 1. Your bearing appears to be between
        ...degrees and...degrees, and sense
        indicates you are to the...(direct-
        ion) of this station;
        2. Your bearing is changing rapidly.

ZME Pass in direction finding bearing
        (of...) obtained on...kHz (or MHz)
        (or between...and...kHz (or MHz).

ZMF Will you endeavour to obtain Bearing of station now transmitting
a direction finding bearing (or of...) (on...kHz (or MHz)) was
of station now transmitting ...(class...) sense determined at...
(or of...) (on...kHz
(or MHz))?

ZMG This bearing (course or position) is
        unreliable. Error in excess of class
        C bearing (or position) may amount
        to...degrees or miles).

ZMH Surface craft using callsign...
        cooperating. Change to...kHz (or MHz)
        and follow diretion finding procedure
        when called.

ZMI Will you send your callsign I am about to send my callsign and
and dashes of five-seconds' dashes of five seconds' duration at
duration at intervals in intervals in order that you (or...)
order that I (or...) may may home on me.
home on you?

ZMJ Check...(1. Correctness of last QUV;
        2. Sense of last QDR; 3. Correctness
        of last QDM; 4. Sense of last QDM).

ZMK Cannot determine your (or...'s...)
        (1. Position; 2. Bearing).

ZML Steer...degrees for 2 minutes if
        possible and send callsign and long
        dashes while you are so doing.

ZMM Increase height to enable more
        accurate bearing to be completed.

ZMN Change over to loop direction finding
        on...kHz (or MHz) (and home on
        transmissions made by...).

      - Page 20 -

Question: Answer, Advice or Order:

ZMO What is my position by Your position by direction finding
direction finding bearing cross bearings from nearest landmark
from the nearest landmark (or from...) is...(class...) at...
(or from...)? (hours).

ZMP Endeavour to plot position from
        bearings taken on station(s) now
        transmitting (or of...) (on...kHz
        (or MHz)).

ZMQ Cannot determine your position, you
        are in line or nearly in line with
        direction finding station baseline.

ZMR Take over direction finding guard as
        previously ordered (on...kHz (or
        MHz)) ( (or MHz)).

ZMS Carry out short direction finding
        procedure (as locally prescribed).

ZMT Sense determination unreliable,
        bearing may be reciprocal.

ZMU ...(1. Listen (for...0 on direction
        finding on...kHz (or MHz) (or between
        ...and...kHz (or MHz));
        2. Shift to direction finding
        frequency...and listen for call-

ZMV What is the Grid Course for The Grid Course for you to steer to
me to steer to reach you reach me (or...) is...degrees at...
(or...)? hours.

ZMW -unassigned-

ZMX -unassigned-

ZMY -unassigned-

ZMZ -unassigned-

ZNA You are encrypting...incorrectly.
        (1. Operating signals; 2. Radio
        callsigns; 3. Address groups).

ZNB What is authentication of... Authentication (of...) is...
(1. Message...; 2. Last (1. Message; 2. Last transmission;
transmission; 3. ...)? 3. ...).

ZNC All transmissions will be authentic-
        ated...(1. On all circuits; 2. On
        this circuit; 3. On...frequency).

ZND You are using authenticator in-
        correctly...(1. Verify authenticator
        system key; 2. Check authentication
        of your last transmission).

      - Page 21 -

Question: Answer, Advice or Order:

ZNE I am prepared to authenticate.

ZNF Addressees who are not holders of
        the cryptographic system employed
        in the text need not decrypt
        (decipher), but shall sight (read)
        translation at first opportunity
        and obtain copy if applicable.

ZNG Commands who are included in the
        collective address used in this
        heading, who are not holders of
        the cryptographic system employed
        in the text, are exempted.

ZNH Plaintext tape of this message
        should be prepared during process
        of decipherment.

ZNI Shift to...(1. On-line; 2. Plain)
        operation now.

ZNJ -unassigned-

ZNK Addressees who do not hold crypto-
        graphic facilities are exempted.

ZNL Receiving Cryptographic Office
        concerned should refer queries
        relating to the text of this
        message (e.g. requests for
        verification) to...(address
        designators except plain language).
        Note: To be used in codress messages
        when necessary to indicate
        originating crypto centre and then
        normally limited to messages of
        Immediate precedence and above.

ZNM Originator authorises the transfer
        of this message into the secure
        networks of all authorities address-
        ed, provided the networks are
        secured or approved for the security
        classification of the message

ZNO Unable to decrypt message... (from
        indefinite callsign...). Note: Only
        to be used under circumstances laid
        down in cryptographic instructions.

ZNP Transfer operation of channel now
        to...(1. Normal; 2. Top Secret;
        3. Conference; 4. Engineering;)
        on-line cipher operation. Note:
        Note: This signal is for use only
        when already in on-line operation.

      - Page 22 -

Question: Answer, Advice or Order:

ZNQ This message (or message...) received
        at this station... (1. Without
        authentication (when authentication
        is in force); 2. Incorrectly

ZNR This message may be forwarded without
        change by radio or non-approved

ZNS -unassigned-

ZNT -unassigned-

ZNU -unassigned-

ZNV -unassigned-

ZNW -unassigned-

ZNX -unassigned-

ZNY -unassigned-

ZNZ -unassigned-

ZOA Relay this message (or message...)
        by visual (to...).

ZOB Take (I will take) no further
        action regarding forwarding

ZOC Station(s) called relay this message
        to addressees for whom you are

ZOD Act as radio link (relaying station)
        between me and...(or between...and

ZOE Can you accept message Give me your message. I will dispose
for...? (1. On-line; of it...(1. On-line; 2. Off-line).
2. Off-line)

ZOF Relay (pass) this message (or
        message...) (or at...).

ZOG Transmit (pass) this message (or
        message...) to...(for...)
        (1. Action; 2. Information).

ZOH Send message for...on...kHz (or MHz)
        by...(1. Receipt method; 2. Broadcast
        method; 3. Intercept method).

ZOI Pass this message to the nearest
        (or...) weather central/control.

      - Page 23 -

Question: Answer, Advice or Order:

ZOJ Unable to relay present
        form...(1. Callsigns not encrypted;
        2. Text not encrypted).

ZOK Relay this message via...

ZOL I will relay your callsign to senior
        officer present afloat, whose call-
        sign is...

ZOM Delivery of this message by mail in
        lieu of broadcast permissable

ZON Place this message (or message...)
        on...(1. Continuous wave broadcast;
        2. Radioteletype broadcast)
        indicated by following specific
        broadcast designator(s)...

ZOO Place this message (or message...)
        on MERCAST indicated by following
        specific broadcast designator(s).

ZOP This message (or message...) has
        been delivered to all broadcast areas
        (or to the following specific broad-
        cast area(s)...).

ZOQ Deliver this message (or message...)
        to all broadcast areas (or to the
        following specific broadcast

ZOR 1. Route traffic for...via...area
        broadcast; 2. Beginning at...
        traffic for you (or...) will be
        routed via...area broadcast.

ZOS Request area routeing for Area routeing for messages for...
messages for... is...

ZOT Transmit or handle this message at
        the lower precedence to the station
        or address designator(s) which

ZOU How should traffic for... Route traffic for...through...(on...
be routed. kHz (or MHz)).

ZOV Station designation preceding this
        operating signal is the correct
        routeing for this message, rerouted

ZOW Broadcast this message at special
        watchkeeping periods for ships with
        (1. One radio operator; 2. Two radio

      - Page 24 -

Question: Answer, Advice or Order:

ZOX Place this message (or message...)
        on submarine broadcast indicated
        by following specific broadcast

ZOY Relay this message only to the
        station(s) whose designation(s)
        preceed this operating signal.

ZOZ Relay this message (or message...)
        in its present form without

ZPA Your speech is distorted.

ZPB Your transmitter has strong radiation
        while idling.

ZPC Your signals are...(1. Fading badly;
        2. Fading slightly; 3. Good for...
        ...words per minute; 4. Getting
        stronger; 5. Getting weaker).

ZPD Is your signal as checked by My signal as checked by monitor...
monitor...satisfactory (1. is satisfactory (1. Locally;
Locally; 2. As radiated)? 2. As radiated).

ZPE Maximum power is now being radiated.

ZPF What is the readability of the The readability of the signals of
signals of the group (net) the group (net) (or of...) is...
(or of...)? (1 to 5).

ZPG What is (are) signal strength(s) Signal strength(s) of the group (net)
of group (net) (or of...)? (or of...) is... (1 to 5).

ZPH -Unassigned-

ZPI -Unassigned-

ZPJ -Unassigned-

ZPK -Unassigned-

ZPL -Unassigned-

ZPM -Unassigned-

ZPN IFF switched ON in distress position.

ZPO The text of this message is to be
        relayed in precisely the same format
        as that in which it is received. No
        characters or machine functions are
        to be added, inserted or deleted and
        the relative positions of the groups
        are to be retained.

      - Page 25 -

Question: Answer, Advice or Order:

ZPP Message which follows is a a
        submarine surfacing signal to be
        cleared on the calling frequency.

ZPQ -Unassigned-

ZPR I have (number) messages (precedence)
        prepared in tape relay format for
        you (or for...(addressees)).
        (Consideration should be given to
        receiving these messages directly
        on a printing reperforator/typing

ZPS -Unassigned-

ZPT This transmission is a transmitter
        pre-acceptance trial. Request
        expeditious strength and readability

ZPU If more than one tropical wind
        warning message in this sequence is
        awaiting transmission, transmit
        highest serial number first.
        (Sequence/serial is understood to
        include tropical warning name or
        number and consecutive warning

ZPV If the earlier wind warnings ident-
        ified by DTG(s) following this signal
        are awaiting transmission, file those
        warnings without further trans-

ZPW This message cancelled at time
        indicated. File without further

ZPX This message is forwarded to your
        for screening and determination of
        need for broadcast promulgation.
        Advise broadcast control commander
        of recommended message disposition.

ZPY -Unassigned-

ZPZ -Unassigned-

ZQA The landing lights at the aerodrome
        (or at the aerodrome at...) are out
        of order.

ZQB What is the magnetic direction The magnetic direction in which
in which landing is to be made? landing is to be made is... degrees.

      - Page 26 -

Question: Answer, Advice or Order:

ZQC Are you (or is...)... I am (
(1. Airborne; 2. Waterborne; (1. Airborne; 2. Waterborne;
3. On land)? 3. On land).

ZQD Am I to carry out the procedure You are to carry out the procedure
appropriate to the use of the appropriate to the use of the...
...(facility)? (facility).

ZQE What is your desired rate of My desired rate of descent is...
descent expressed in hundreds hundreds of feet per minute.
of feet per minute?

ZQF What is the length in yards of The length of the runway in use
the runway in use? is ...yards.

ZQG -Unassigned-

ZQH -Unassigned-

ZQI -Unassigned-

ZQJ -Unassigned-

ZQK -Unassigned-

ZQL -Unassigned-

ZQM -Unassigned-

ZQN -Unassigned-

ZQO -Unassigned-

ZQP -Unassigned-

ZQQ -Unassigned-

ZQR -Unassigned-

ZQS -Unassigned-

ZQT -Unassigned-

ZQU -Unassigned-

ZQV -Unassigned-

ZQW -Unassigned-

ZQX -Unassigned-

ZQY -Unassigned-

ZQZ -Unassigned-

      - Page 27 -

Question: Answer, Advice or Order:

ZRA How does my frequency check? Your frequency is...(1. Correct;
        2. Slightly (or...Hz (or kHz))
        high; 3. Slightly (or...Hz (or kHz))
        low; 4. Stable on steady mark;
        5. Stable on steady space;
        6. Unstable; 7. Erratic).

ZRB Check your (or...'s) frequency on
        this circuit (or on...kHz (or MHz)).

ZRC Shall I tune my transmitter Tune your transmitter to...(1. Proper
to...(1. Proper frequency; frequency; 2. Zero beat with my
2. Zero beat with your (or...) transmitter).
(or...) transmitter)?

ZRD What is the frequency of the... The frequency of facility
radio facility now in operation? now in operation is...

ZRE On what frequency do you hear I hear you best on...kHz (or MHz).
me best?

ZRF Will you send tuning signal on Am about to send tuning signal on my
your present frequency (or on present frequency (or on...kHz (or
...kHz (or MHz)) for one MHz)).
minute or until AS is given?

ZRG When will a change of frequency A change in frquency (to...kHz (or
(to...kHz (or MHz)) be MHz)) will be necessary at
necessary? approximately...

ZRH Is my frequency shift correct? Your frequency shift is...(1. Too
        wide; 2. Too narrow; 3. Not linear;
        4. Correct) (by Hz).

ZRI -Unassigned-

ZRJ Will you check your...? I will check my...

ZRK Shall I revert to single Revert to single channel working.
channel working?

ZRL Are you working on the correct I am working on the correct code.
code? NOTE: This meaning NOTE: This meaning applies only to
applies only to frequency frequency shift diplex.
shift diplex.

ZRM Can you receive both sidebands I can receive...(1. The upper side-
of my independent sideband band; 2. The lower sideband; 3. Both
transmissions? sidebands).

ZRN Do you intend to transmit on... I intend to transmit on...(1. The
(1. The upper sideband; 2. The upper sideband; 2. The lower side-
lower sideband; 3. Both band; 3. Both sidebands independ-
sidebands independently)? ently).

ZRO Can you read me on... (1. I can read you on...(1. Channel A;
Channel A; 2. Channel B; 2. Channel B; 3. Channel(s)... 4. All
3. Channel(s)...; 4. All channel(s).

      - Page 28 -

Question: Answer, Advice or Order:

ZRP Transfer signal on

ZRQ Change to other sideband.

ZRR Message(s) number(s)...will no longer
        be broadcast but are effective and of
        interest (to units indicated).

ZRS Your carrier is...(1. Over-suppressed;
        2. Under-suppressed).

ZRT Radiate full unmodulated power

ZRU Are my tone frequencies Your tone for...(1. Marking and
correct? spacing are high; 2. Marking and
        spacing are low; 3. Marking and
        spacing are correct).

ZRV -Unassigned-

ZRW -Unassigned-

ZRX -Unassigned-

ZRY -Unassigned-

ZRZ -Unassigned-

ZSA May I ascend to...(height)? You may ascend to...(height).

ZSB May I descend to...(height)? You may descend to...(height).

ZSC Switch on IFF.

ZSD IFF switched OFF.

ZSE Do you have glider in tow? ...(1. We have glider in tow; 2. We
        are forced to release glider at
        (approximate position)...).

ZSF Switch off...(1. IFF; 2. IFF sets for
        10 minutes in area denoted except for
        ships whose callsigns follow).

ZSG May I make an approach using You may approach using the facility
the facility indicated. indicated.

ZSH -Unassigned-

ZSI You are...(1. To maintain height
        of...feet and report over...(call-
        sign) range station; 2. To hold on
        ...leg of the beam...(callsign)
        range station at height...feet)

ZSJ -Unassigned-

ZSK -Unassigned-

      - Page 29 -

Question: Answer, Advice or Order:

ZSL -Unassigned-

ZSM -Unassigned-

ZSN -Unassigned-

ZSO Send tapes...(1. Once; 2. Twice).

ZSP -Unassigned-

ZSQ -Unassigned-

ZSR -Unassigned-

ZSS -Unassigned-

ZST -Unassigned-

ZSU -Unassigned-

ZSV -Unassigned-

ZSW -Unassigned-

ZSX -Unassigned-

ZSY -Unassigned-

ZSZ -Unassigned-

ZTA ...(1. Radio; 2. Visual; 3. Landline;
        4. Teletypewriter (Teleprinter);
        5. Telephone; 6. Automatic;
        7. Fascimile; 8. Shore telephone;
        9. Shore teleprinter; 10. Radio-

ZTB ...(1. Tranmitter-distributor;
        2. Auto-head; 3. Perforator;
        4. Reperforator; 5. Printer;
        6. Undulator; 7. Keyboard;
        8. Frequency shift keyer;
        9. Multiplexing carrier base;
        10. On-line crypto device).

ZTC ...(1. Does my...appear to be ...(1. Your...appears to be faulty;
faulty; 2. Is your...faulty)? 2. faulty).

ZTD Shall I use...? Use...

ZTE Are you (or is...) able to I am ( able to use...

ZTF Are repairs completed? Repairs completed.

ZTG ...(class of emission/type of

ZTH -Unassigned-

      - Page 30 -

Question: Answer, Advice or Order:

ZTI ...(1. Receiver; 2. Transmitter;
        3. Power supply; 4. Antenna system;
        5. Radio direction finder).

ZTJ Cease using...

ZTK Are you (or is...) connected I am ( connected to...

ZTL Are you (or is...) about to I am ( about to disconnect.

ZTM I (or...) is unable to use...

ZTN What is my bias distortion? Your bias distortion is...
        (1. Excessive; 2. ...percent
        (marking); 3. ...percent (spacing);
        4. ...percent (total distortion)).

ZTO Is my character formation Your character formation is...
correct? (1. Correct; 2. Defective in the
        start element; 3. Defective in the
        1st unit; 4. Defective in the 2nd
        unit; 5. Defective in the 3rd unit;
        6. Defective in the 4th unit;
        7. Defective in the 5th unit;
        8. Defective in the stop element).

ZTP What is the duration of your The duration of my modulation
modulation cycle? cycle is...
          50 Baud Equipment
        1. 148 milliseconds (7.42 units)
        2. 150 milliseconds (7.5 units)
        3. 152 milliseconds (7.6 units)
        4. ... erratic per character.

          45.5 Baud Equipment
        1. 161 milliseconds (7.35 units)
        2. 163 milliseconds (7.42 units)
        3. 165 milliseconds (7.5 units)
        4. ... erratic per character.

ZTQ Will you...(1. Get the Circuit I will...(1. Get the Circuit
Engineer/Facility Control Engineer/Facility Control Tech-
Technician to speak on this nician to speak on the circuit;
circuit (or circuit...); 2. Hand the line over to the
2. Hand the line over to the Circuit Engineer/Facility Tech-
Circuit Engineer/Facility nician for check and call you when
Control Technician for check)? check has been completed).

      - Page 31 -

Question: Answer, Advice or Order:

ZTR Will you...(1. Disconnect your I will...(1. Disconnect (or I am
equipment from line and carry disconnecting) my equipment from
out local test, reconnecting to and carry (or to carry) out local
line in ...minutes; 2. Connect test, reconnecting to line in...
your transmit line to your minutes; 2. Connect my transmit line
receive line to enable me to to my receive line to enable you to
carry out a loop test for... carry out a loop test for...
minutes)? minutes).

ZTS Is the line satisfactory? The line is...(1. Satisfactory;
        2. Unsatisfactory).

ZTT -Unassigned-

ZTU -Unassigned-

ZTV -Unassigned-

ZTW -Unassigned-

ZTX -Unassigned-

ZTY -Unassigned-

ZTZ -Unassigned-

ZUA Request a timing signal now Timing signal will be transmitted now
(or at...) (or at...). The numerals indicating
        the time will be followed by a five-
        second dash terminating exactly at
        the time indicated.

ZUB At...


ZUD Until further orders (or until...).

ZUE Affirmative (Yes).

ZUF Air raid...(1. Warning; 2. In
        progress; 3. All clear).

ZUG Negative (No).

ZUH Unable to comply.

ZUJ Stand by.

ZUK ...(Appointment Code) desires ...(Appointment Code) is now ready
key conversation on this to begin key conversation with...
circuit with...(Appointment (Appointment Code).
Code). Will you indicate when
you are ready?

ZUL -Unassigned-

ZUM -Unassigned-

ZUN -Unassigned-

      - Page 32 -

Question: Answer, Advice or Order:

ZUO -Unassigned-

ZUP -Unassigned-

ZUQ -Unassigned-

ZUR -Unassigned-

ZUS -Unassigned-

ZUT -Unassigned-

ZUU -Unassigned-

ZUV -Unassigned-

ZUW -Unassigned-

ZUX -Unassigned-

ZUY -Unassigned-

ZUZ -Unassigned-

ZVA Station called is responsible for
        relay or delivery to all stations
        in line two (2) or to stations

ZVB What was your time over last My time over last compulsory
compulsory reporting point, reporting point was...and my ETA
and ETA at next compulsory at next compulsory reporting point
reporting point? is...

ZVC -Unassigned-

ZVD -Unassigned-

ZVE What are the security Security conditions at my termination
conditions of your of this channel (
termination(s) of this designated) are...(1. Secured for
channel ( Restricted; 2. Secured for Confid-
designated)? ential; 3. Secured for Secret;
        4. Secured for Top Secret).

ZVF This channel (
        designated) is unserviceable for
        classified traffic.

ZVG -Unassigned-

ZVH -Unassigned-

ZVI -Unassigned-

ZVJ -Unassigned-

ZVK -Unassigned-

ZVL -Unassigned-

      - Page 33 -

Question: Answer, Advice or Order:

ZVM -Unassigned-

ZVN -Unassigned-

ZVO -Unassigned-

ZVP -Unassigned-

ZVQ This message, relating to a warning,
        an alert, distress, or an emergency,
        is authorised to be relayed via the
        facilities of your network without
        prior arrangement.

ZVR Retransmit this message (or message
        ...) at once to all subordinate

ZVS -Unassigned-

ZVT -Unassigned-

ZVU -Unassigned-

ZVV -Unassigned-

ZVW -Unassigned-

ZVX -Unassigned-

ZVY -Unassigned-

ZVZ -Unassigned-

ZWL No forwarding action to the desig-
        nation(s) immediately following is

ZWM Correct answer to last question (or
        question...) is...(or will be found

ZWN Correct version of the part of the
        last message (or message...) which
        was sent incorrectly is...(or will
        be found in...).

ZWO Following message (or question, or
        exercise) is for the exercise of
        (1. Junior operators; 2. Senior
        operators; 3. Ratings on watch).

ZWP A junior operator is to carry out...
        (1. A standard flashing exercise;
        2. A standard semaphore exercise;
        3. A standard radio telegraphy
        transmitting exercise; 4. A standard
        radio telegraphy receiving exercise).

ZWQ -Unassigned-

      - Page 34 -

Question: Answer, Advice or Order:

ZWR -Unassigned-

ZWS -Unassigned-

ZWT -Unassigned-

ZWU -Unassigned-

ZWV -Unassigned-

ZWW -Unassigned-

ZWX -Unassigned-

ZWY -Unassigned-

ZWZ -Unassigned-

ZXA The following group is a callsign,
        delivery group or an address group.
        (Used in plain language texts of
        messages other than procedure

ZXB Station(s) to whom this message is
        routed obtain a complete copy of
        this interrupted transmission by
        addressing a service message to
        the originating station.

ZXC -Unassigned-

ZXD This message is to be delivered to
        the addressee(s) in tape form.

ZXE -Unassigned-

ZXF -Unassigned-

ZXG -Unassigned-

ZXH -Unassigned-

ZXI -Unassigned-

ZXJ -Unassigned-

ZXK Station called relay this message
        (or message...) addition to
        predetermined responsibilities.

ZXL -Unassigned-

ZXM -Unassigned-

ZXN -Unassigned-

ZXO Request you obtain retransmission
        of messages...from station...

      - Page 35 -

Question: Answer, Advice or Order:

ZXP I have for you...(1. A request for
        direct air support; 2. A reply to
        a support request. Precedence

ZXQ I have for you...(1. A request for
        tactical reconnaisance; 2. A request
        for photographic reconnaisance;
        3. A request for artillery reconn-
        aisance. Precedence is...)

ZXR Extensive flag signalling will take
        place shortly (or in...minutes).

ZXS Message which follows is to be
        handled by...(Officer Emergency
        Cryptographic team; 2. Ratings
        Emergency Cryptographic team;
        3. Senior Communications Rating;
        4. Junior Communications Rating;
        5. Coder (Educational)).

ZXT This message is not to be transmitted
        by radio telegraph or radiotelephone
        in any form over part of its route.

ZXU -Unassigned-

ZXV -Unassigned-

ZXW This message has been delivered to
        all action addressees whose
        designations follow this operating

ZXX This message has been delivered to
        all information addressees whose
        designations follow this operating

ZXY Transmit this message to the add-
        ressee(s) indicated by the
        numeral(s) following... All add-
        ressees are to be counted conseq-
        utively as they appear (numbers to
        be separated by the Separative

ZXZ -Unassigned-

The series ZYA through ZZZ is reserved for assignment as required by
national authorities.

      - Page 36 -

Cable & Wireless Service Z-Code.

(This is probably not a complete list

ZAC.....Advise...(callsign) the frequency you are reading
        ...running dual for you.

ZAK.....Transmission interrupted at...hours.

ZAL.....Alter your wavelength. (Change frequency).

ZAN.....We can receive absolutely nothing.

ZAP.....Acknowledge please.

ZAR.....Revert to automatic relay.

ZCA.....Circuit seriously affected. All signals or channels
        from...unreadable. Please try to advise us on which
        frequency a readable signal is useable.

ZCB.....Circuit interrupted. Signals unheard.

ZCC.....Collate code.

ZCD.....Your collation is different.

ZCF.....Please check your centre frequency.

ZCI.....Circuit interrupted. We are advised
        running and available. Please cover also and
        advise which signal first becomes useable.

ZCK.....Check your keying.

ZCL.....Transmit your callsign intelligibly (in
        international morse at no more than 24 wpm, (or by
        voice) for station identification.

ZCO.....Collation is missing.

ZCP.....Local receiving conditions are poor, please
        increase power to maximum.

ZCR.....Now using concentrator. Please give preliminary

ZCS.....Cease sending.

ZCT.....Send words twice.

ZCW.....Are you in direct communication with...?

ZDC.....We are diagnosing circuit faults and will advise.

ZDF.....Your frequency is drifting

ZDH.....Your dots are too heavy.

ZDL.....Your dots are too light.

ZDM.....Your dots are missing.

      - Page 37 -

ZDT.....Following transmitters are running dual...

ZDV.....Your dots are varying in length.

ZED.....We are experiencing drop-outs.

ZEF.....We are experiencing fill-ins.

ZEG.....We are experiencing garbles.

ZFA.....Auto transmission is failing.

ZFB.....Signals are fading badly.

ZFC.....Please check your shift.

ZFD.....Your signal is fading.

ZFF.....Please observe and furnish FRAME code
        reports on...(...frequency).

ZFK.....Revert to FSK.

ZFO.....Signals faded out.

ZFQ.....Your frequency shift is...Hz.

ZFR.....Your signal is fading rapidly.

ZFS.....Your signal is fading slightly

ZGF.....Your signals good for...wpm.

ZGP.....Please give priority.

ZGS.....Your signals getting stronger.

ZGW.....Your signals getting weaker.

ZHA.....How are your conditions for auto reception?

ZHM.....Indicate extent of reception of harmonic radiation.

ZHS.....Send high speed auto.

ZHY.....We are holding your...

ZIM.....Interruption by ISM interference.

ZIP.....Increase power.

ZKO.....Revert to on/off keying.

ZKQ.....Advise when ready to resume.

ZKW.....The key weight of your signals is...percent.

ZLB.....Please give long breaks.

ZLD.....Receiving a long dash (mark or space) from you.

      - Page 38 -

ZLL.....Landline control signals distorted due to
        inductive pickup.

ZLP.....Reduce power.

ZLS.....We are suffering from a lightning storm.

ZMH.....Magnetic activity.

ZMO.....Standby a moment.

ZMP.....Mispunch or perforator failures

ZMQ.....Standby for...

ZMU.....Multipath effect causing distortion.

ZNB.....We do not get your breaks, we send twice.

ZNC.....No contact with...

ZNG.....Receiving conditions no good for code.

ZNI.....No call letters (ident) heard.

ZNN.....Nothing further. All traffic cleared.

ZNO.....Not on the air.

ZNR.....Not received.

ZNS.....Here new slip.

ZOA.....We have checked...(equipment or callsign).

ZOD.....We are observing...

ZOK.....Receiving OK.

ZOL.....OK on line.

ZOM.....Mail delivery possible.

ZOR.....Transmit reversals.

ZPA.....Printer line-feed missing.

ZPC.....Printer carriage-return missing.

ZPE.....Punch (perforate) everything.

ZPF.....Printer motor running fast.

ZPO.....Send plain once.

ZPP.....Punch (perforate) plain only.

ZPR.....Restart present slip.

ZPS.....Printer motor running slow.

      - Page 39 -

ZPT.....Send plain twice.

ZRA.....Your tape is reversed.

ZRB.....Relayed signals is corrupt. Please check
        signal being received.

ZRC.....Can you receive code?

ZRF.....Run foxes. (Send a QBF test tape).

ZRK.....Reversed keying.

ZRL.....Rerun previous slip.

ZRM.....Please remove modulation from...

ZRN.....Rough note.

ZRO.....Are you receiving OK?

ZRR.....Run reversals.

ZRS.....Rerun slip number...

ZRT.....Revert to traffic.

ZRY.....Run a test tape.

ZSF.....Send faster.

ZSH.....Heavy static.

ZSI.....Advise signal intensity as received.

ZSM.....Microvolt input to receiver is...

ZSN.....Please observe and furnish SINPO code
        reports on...(call and/or frequency).

ZSO.....Send slips once.

ZSR.....Signals strong/readable.

ZSS.....Send slower.

ZST.....Send slips twice.

ZSU.....Your signals unreadable.

ZSV.....Your speed is varying.

ZTA.....Transmit by auto.

ZTH.....Transmit by hand.

ZTI.....Transmission temporarily interrupted.

ZUA.....Conditions unsuitable for automatic working.

ZUB.....Unable to break you.

      - Page 40 -

ZUC.....Unable to comply. (Will do so at...hours).

ZVB.....Varying bias.

ZVF.....Signals varying in frequency.

ZVP.....Send Vs please.

ZVS.....Signals vary in intensity.

ZWC.....Wipers or clicks here.

ZWO.....Send words once.

ZWR.....Signals weak but readable.

ZWS.....Frequency varies.

ZWT.....Send words twice.

ZXA.....Adjusting (or please adjust) to receive

ZXC.....Pictures...conditionally accepted. Will advise.

ZXD.....Send dashes.

ZXF.....You are floating badly.

ZXH.....Your limits are too high. Reduce to...Hz.

ZXJ.....You are jumping out of phase.

ZXK.....Is your sync correct?

ZXL.....Your limits are too low. Reduce to...Hz.

ZXO.....Last run defaced (due to...).

ZXP.....Go ahead with pictures.

ZXS.....You are floating slowly.

ZXV.....Your modulation varies.

ZYA.....Cease traffic on all channels. Send As on
        "A" channel for synch.

ZYC.....Cycling on ARQ with errors stored your end.

ZYK.....Your keying on channel...affected; please check.

ZYN.....Reduce bias.

ZYP.....Change from multiplex to single-channel.

ZYR.....Put...on multiplex reversals.

ZYS.....Transmission speed is...

ZYX.....Revert to multiplex reversals...channels.

      - Page 41 -