acp131 operating sigs

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UNCLASSIFIED ORIGINAL

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COMMUNICATIONS INSTR UCTIONS

OP ER ATING SIGNALS

ACP 131(E)

MAR CH 1997


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1 March 1997

FOREWORD

1. ACP 131, COMMUNICATION INSTRUCTIONS, OPERATING SIGNALS, is an

UNCLASSIF IED Allied Commu nication Pu blicat ion (ACP). Per iodic accountin g is not requir ed.

2. ACP 131 will be effective for National, Service or Allied use when directed by the appropriate

Implementing Agency.

3. This publication contains Allied military information and is furnished for official purposes only.

4. I t is permitted to copy or make extracts from this publication without consultat ion with the

Combined Commu nications E lectr onics Board.

5. This publica t ion may be car r ied in a ircraft for use there in .


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THE COMBINED COMMUNICATION-ELECTRONICS BOARD

LETTER OF P ROMULGATION

FO R ACP 131(E)

1. The purpose of this Combined Communication Electronics Board (CCEB) Letter of Promulgation

is to implemen t ACP 131(E) with in th e Arm ed Forces of th e CCEB Nat ions. ACP 131(E),

COMMUNICATIONS INSTRUCTIONS OPERATING SIGNALS, is an U NCLASSIF IED pu blicat ion

developed for Allied use an d, under th e direction of the CCEB Principals. It is pr omulgated for guida nce,

information, and use by the Armed Forces and other users of military communications facilities.

2. ACP 131(E) will be made EF FE CTIVE WHEN DIRECTED by th e CCEB an d, when effective,

will supersede ACP 131(D) which shall be destroyed in accordance with Nat iona l regulat ions. The

effective status of this publication is shown below.

EFFECTIVE STATUS

Publica tion Effective for Date Authority

ACP131(E) CCEB When Directed LOP

3. Service-originat ed corr espondence will be forwar ded th rough th e norma l militar y chain of

comma nd, mar ked for th e att ent ion of th e appropria te Service commu nications chief or director. All

proposed amen dment s to the pu blication a re to be forwarded to the n at ional coordinating a ut horities of

the CCEB.

For th e CCEB Principals:

I R WILLIAMS

Lieutenant Colonel

Chairman of the CCEB Washington Staff


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RECORD OF CHANGES AND CORRECTIONS

E n t e r C h a n g e or C o r r e c t i o n i n Ap p r o p r i a t e C o lu m n

Iden t i fi ca t ion o f Cha nge o r

C o r r e c t i o n a n d d a t e o f s a m e

Da t e E n ter ed By w h om en te r ed

(S ig n a t u r e : r a n k ;

g r a d e o r r a t e :

n a m e , c o m m a n d )

Ch a n ge Cor r ect ion


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TABLE OF CONTE NTS

Title Pa ge ..................................................... ...................................................i

Foreword..........................................................................................................iiiCCEB Letter of Promulgat ion .................................................... .......................v

Record of Chan ges and Corr ection ....................................................... ..............vii

Table of Conten ts......................... ....................................................... ..............ix - xi

CHAPTER 1 - GENER AL INSTRUCTIONS

Purpose............................................................................................................1-1

General............................................................................................................1-1

Auth orizat ion ................................................ ...................................................1-1

Inst ructions .....................................................................................................1-2 - 1-4

CHAPTE R 2 - OPE RATING SIGNALS - DECODE

Q SIGNALS

QAA - QAZ.... . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2A1 - 2A3

QBA - QBZ.... . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2A3 - 2A5

QCA - QCZ.... . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2A5 - 2A6

QDA - QDZ.....................................................................................................2A6 - 2A7

QEA - QEZ.....................................................................................................2A7 - 2A8

QFA - QFZ.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2A8 - 2A10

QGA - QGZ.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2A10 - 2A11

QHA - QHZ ....................................................................................................2A11

QIA - QIZ.... . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2A11 - 2A12

QJA - QJZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2A12 - 2A13

QKA - QKZ.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2A13 - 2A15

QLA - QLZ.....................................................................................................2A15

QMA - QMZ....................................................................................................2A15 - 2A16

QNA - QNZ ..... . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2A16 - 2A18

QOA - QOT ..... . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2A18 - 2A19

QOU - QOZ.....................................................................................................2A19

QRA - QRZ.... . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2A19 - 2A20

QSA - QSZ.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2A20 - 2A21

QTA - QTZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2A21 - 2A23

QUA - QUZ ..... . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2A23 - 2A26

QVA - QZZ .....................................................................................................2A26


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TABLE OF CONTENTS (Cont d)

Z SIGNALS

ZAA - ZAZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B1 - 2B2

ZBA - ZBZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B2 - 2B4ZCA - ZCZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B4 - 2B7

ZDA - ZDZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B7 - 2B9

ZEA - ZEZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B9 - 2B10

ZFA - ZFZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B10 - 2B12

ZGA - ZGZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B12 - 2B13

ZHA - ZHZ.....................................................................................................2B13 - 2B14

ZIA - ZIZ .... . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2B14 - 2B15

ZJA - ZJ Z.... . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2B15 - 2B16

ZKA - ZKZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B16 - 2B18

ZLA - ZLZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B18 - 2B19

ZMA - ZMZ.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B19 - 2B21

ZNA - ZNZ.....................................................................................................2B21 - 2B23

ZOA - ZOZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B23 - 2B24ZPA - ZPZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B24 - 2B26

ZQA - ZQZ .....................................................................................................2B26

ZRA - ZRZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B27 - 2B28

ZSA - ZSZ.... . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..2B28 - 2B29

ZTA - ZTZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B29 - 2B30

ZUA - ZUZ.... .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B30 - 2B31

ZVA - ZVZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B31 - 2B32

ZWA - ZWZ ..... . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .2B32 - 2B33

ZXA - ZXZ .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .2B33 - 2B35

CHAPTE R 3 - OPE RATING SIGNALS - ENCODE

Search and Rescue.... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..3A1 - 3A4

Radio Navigation .... . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .3B1 - 3B3

Direction Finding .... . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .3C1 - 3C3

Aeronautical and Sea Operations.... . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..3D1 - 3D11

Meteorology......................................................................................................3E1 - 3E8

Communications Equipment and Circuits Adjusting and Testing . .. .. .. .. . .. .. .. .. . .. ..3F1 - 3F14

Circuit Discipline and Net Control .. .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..3G1 - 3G9

Message Handling .... . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..3H1 - 3H15

Security and Cryptographic... . . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . ..3I1 - 3I3

Visual.. . . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .3J1 - 3J2

Exercise and Miscellaneous .... . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. . .. . . .. . .. . .. . . .. . .. . .. . . .. .3K1 - 3K2

CHAP TER 4 - MISCEL LANEOUS ABBREVIATIONS AND SYMBOLS

Decode .............................................................................................................4A1 - 4A4

Encode .............................................................................................................4B1 - 4B5


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TABLE OF CONTENTS (Cont d)

CHAP TER 5 - SE RIE S ZYA - ZZZ (Reserved for intra-nation, intra service or intra command use)

ZYA - ZZA........................................................................................................5-1 - 5-3

CHAPTER 6 - DESIGNATION OF EMISSIONS

Emission Designation Features.........................................................................6-1

Necessary Bandwidt h - The First F our Symbols ................................................6-1

Classificat ion - The Next Thr ee Symbols......................................... ....6-2

Additional Char acterist ics - The Last Two Symbols ...........................................6-4

Fourt h Symbol - Deta ils of Signa l (s) ................................................... ..............6-4

Fifth Sym bol - Natu re of Multiplexing..................... ..........................................6-5

Classificat ion of Typical Em issions ...................................................... ..............6-5

List of Effective Pa ges......................................................................... ..............LEP -1


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CHAP TER 1

GENER AL INSTRUCTIONS

101. P UR P OSE

The purpose of this publication is to list operating signals and provide instructions for their use.

102. GE NE R AL

This publication includes:

a. Operating Signals from the following series of internat ional civil Q code:

(1) The series QAA to QNZ inclusive, the meanings of which are assigned by the

Int ern at iona l Civil Aviation Organizat ion (ICAO). In genera l, th e only civil stat ions th at will ha ve

available a copy of this series ar e th ose of the Aeronau tical Service. Therefore, th is series is not to be

used with other civil stations unless it is kn own t hat the stat ion concerned is familiar with t he series.

(Note: Sta tions of th e Aeronau tical Service ar e those operat ed in accordance with I CAO int erna tionalstandards and recommended practices to provide for the safety of air navigation and for the regular,

efficient and economical operation of the air services).

(2) The series QOA to QQZ inclusive is reserved for th e Maritime Services.

(3) The series QRA to QUZ inclusive, the meanings of which are assigned by the

Int ern at iona l Telecommun icat ions Un ion (ITU). In gener al, all civil sta tions will have available a copy

of th is series. Therefore, th is series may be used with a ll civil sta tions unless th e stat ion concerned

indicates its un familiarity with t he series.

(4) The series QVA to QZZ inclusive has not been allocated to date.

b. Operating signals from the series ZAA to ZXZ inclusive of the allied military Z code. The

series ZYA to ZZZ inclusive is reserved for the temporary or permanent assignment of meanings on an

intr a-military basis by any n ation, service or comman d au thorized use of this publication. For th e

convenience of assigning authorities, provision for this series (ZYA-ZZZ) is included in Chapter 5 of this

publication.

c. Miscellaneous abbreviations and symbols developed or approved by ICAO for use with the

series QAA to QNZ inclusive. These abbr eviations and s ymbols, however, are au th orized for u se by

allied military stations with any Q or Z signal subject to the use limitations, if any, of that Q or Z signal

(see par agraph 103).

103. AUTH OR IZAT ION

a. The series QAA to QUZ of the internat ional civil Q code, and the series ZAA to ZXZ of the

allied military Z code, are authorized for use between allied military stations subject to the provisions of

par agra ph 102. Q and Z signals of th ese series may be used together between allied militar y stations.


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b. The series QAA to QUZ of the interna tional civil Q code are aut horized for use between

Allied milita ry sta tions and civil stat ions, subject to the pr ovisions of par agra ph 102. The allied

military Z code (ZAA-ZZZ) is not authorized for use between allied military stations and civil commercial

stations.

c. Any nation, service or command may prohibit or restrict the military use, within its area

of jurisdiction, of an y opera ting signa l. However, when su ch opera ting signa ls are r eceived from otherusers, they must be recognized and acted upon.

104. INSTR UCTIONS

a. Action. Q or Z signals ordering or indicating that an action is to be taken (a change of

frequency, for example) will be answered before the action is taken, unless the "Broadcast" method is

used or the st ation ordering or indicating th e action h as indicated t hat an answer is not required.

b. Affirmatives or Negatives. Operat ing signals, as appropriate, will be used by allied

military stations to convey an affirmative or negative sense...

(1) To civil stat ions by adding "C" (affirmat ive) or "N" (negative) after the Q signal and

any data used with it:

Examples (of replies):

(a) QFQ C means: (Yes) The approach and runway l ights are li t .

(b) QAK N means: (No) There is no risk of collision. "NO", instead of "N", is

au th orized for u se by an d to civil stat ions of th e Aeronau tical Service.

(2) To allied military stations by using the appropriate Q or Z signal:

Examples (of replies):

(a) QHZ means: (Yes) Circle the aerodrome (or go around).

(b) ZOE Means: (Yes) Give me your message. I will dispose of it.

NOTE: In addition to the above, replies to questions from militar y stations may be made by using ZUE

meaning Affirmative (Yes) or ZUG meaning Negative (No).

c. Blank Spaces. Blank spaces in the meanings of Q and Z signals will be completed, in t he

order in which they appear; however, blank spaces enclosed in parentheses normally will be completed

on an optiona l basis only.

Examples:

(1) QBM BF6 1010Z means: Here is the message sent by BF6 at 1010Z

hours.

NOTE: The meaning assigned QBM is "Here is the message sent by..at...hours"; ther efore, as these

blank spaces are not included in parentheses, all are completed, in the order in which they

appear.


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(2) ZKO BG2 means: I have handed over guard to BG2.

NOTE: The meaning a ssigned ZKO is "I ha ve handed over guard (to...) (on...kHz (or MHz)) (serial

number of last message received was...)"; however, in the above example, the user elected to

complete only one of the blan k spa ces enclosed in pa rent heses.

d. Call Signs. Normally call signs will follow the Q or Z signal to which they refer;however, th ey also ma y precede the operatin g signa l for separa tion or clarity.

e. Frequencies:

(1) When the mean ing of a Q or Z signal includes the expression "on... kHz (or MHz)",

the figures used alone (not supplemented by an abbreviation) always will indicate the frequency in

kiloher tz per second. To indicat e the frequency in megaher tz per second, the figur es will be

supplemen ted by th e abbreviation "MHz".

(2) Provided that n o confusion can arise, in those Q or Z signals whose meaning

includes the expression "on...kHz (or MHz)", the circuit designator or other disguised reference, if

available, will be used in place of the a ctual frequen cy.

(3) Although not provided for in the meaning of a Q or Z signal, a frequency may be

used with any such operating signal by adding figures and the appropriate abbreviation ("kHz"

(kiloher tz) or "MHz" (megahert z)).

f. Numbered Alternates. Q and Z signals with numbered alternate meanings wil l be

followed, without spacing, by the appropriate number to indicate the meaning intended.

Examples:

(1) QCB2 means: Delay is being caused by your slowness in answering.

NOTE: QCB has the following numbered alternat e meanings - "Delay is being caused by...(1. your

transmitting out of turn; 2. your slowness in answering; 3. lack of your reply to my...)."

(2) ZAP5 means: Work s ingle sideband.

NOTE: ZAP h as t he following numbered altern ate m eanings - "Work...(1. simplex; 2. duplex; 3. diplex;

4. mu ltiplex; 5. single sideban d)."

g. Plain Language. Plain unabbreviated language is authorized for use to complete or

amplify the mea ning of opera ting signals only when n o oth er a pproved method will do.

h. Questions. Operating signals, as appropriate, will be used by allied military stations to

ask quest ions:

(1) Of civil stations, by adding the prosign IMI after the Q signal and any data used

with it;

Example: QAR 15 IMI means: May I stop listening on th e wat ch frequency for 15

minutes?


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(2) Of military stations, by inserting the prosign INT before the Q or Z signal to

which it refers.

Examples:

(a) INT QAR 15 means: May I stop listening on the watch frequency for 15 minutes?

(b) INT ZDJ means: How many groups does your message contain?

i . Securi ty. Operating signals possess no securi ty. They must be regarded as the

equivalent of plain langua ge.

j. Separation. The separative sign (prosign II, written as a short dash) may be used to

separ at e Q or Z signa ls when desired.

k. Time Groups. Time groups (including date-time groups) used with Q or Z signals always

will be followed, without spa cing, by a zone suffix lett er (see ACP 121). Alth ough not provided for in t he

meaning of a Q or Z signal, a time group (including date-time group) may be used with any such

operating signal.

l. Units of Measurement. When units of measurement are desired for use which differ from

th ose in th e mean ing of an operating signal, an appr opriate abbreviation will be used (see Chapter 4).

m. Class of Emission (Chapter 6). When using operating signals concerning radio equipment

or its use, e.g. QSU, QSW, ZTD, ZTE, ZTJ, ZTM, the class of emission/type of transmission may be

indicated by use of the tables in Chapter 6. The operating signal ZTG is used for this purpose unless

Chapter 6 is referred to in the meaning of the signal.

Examples:

(1) QSU F1B means: Send or reply on this frequency use frequency shift keyed

telegraphy.

(2) ZTM ZTG R3E means: I am unable to use single sideband, reduced carrier,

telephony.


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CHAP TER 2

OP ERATING SIGNALS

DECODE

SECT ION A - Q SIGNALS

SIGNAL QUESTION ANSWER, ADVICE OR ORDER

QAA

QAB Ma y I ha ve clea r an ce (for ...) fr om ...(p la ce

and/or control) to...(place and/or control)

at...(figures and units) height

above...(datum)?

You are cleared (or...is cleared) by... from...

(place and/or control) to... (place and/or control)

at...(figures and units) height above...(datum).

QAC

QAD

QAE

QAF Will you advice me wh en you ar e (wer e)

at (over)...(place)?

I am (was) at (over)...(place) (at...hours)

(at...(figures an d un its)) height above...

(datum).

QAG Arrange your flight in order to ar rive

over...(place) a t...hours

or

I am a rr anging my flight in order to arr ive

over...(place) a t...hours .

QAH Wh at is you r h eigh t a bove... (da tu m)? I am at ...(figu res an d u nit s) h eigh t

above...(dat um ). Note: An aircra ft is

permitt ed to reply to QAH IMI by using a ny of

th e an swer form s of signals QBF, QBG, QBH,

QBK, QBN or QBP. In such cases the signa lQAH is omitt ed from the r eply.

or

Arr an ge your flight s o as t o reach...(figures

and units) height above...(datum) at...(hours or

place).

QAI What is the essent ial t raffic?

Note: Relates to aircraft an d not

communication traffic.

The essential traffic is...

Note: Relates to aircraft an d not

communication traffic.

QAJ

QAK Is there any r isk of collision? There is r isk of collision.

Note: This signa l should be followed by

appr opriat e Q signals or ICAO approved

abbreviat ions giving instr uctions for a voiding

collision.

QAL Ar e you goin g t o la nd at ...(pla ce)?

or

Has aircraft...landed at...(place)?

(See also signa l QTP.)

I am going to land at ...(place)

or

(You may) land at...(place).

or

Aircraft...landed at...(place).

(See also signa l QTP.)


13/166


14/166

ACP 131(E)

DECODE


2A - 3


QAZ Ar e you exper ien cin g comm un ica tion

difficulties th rough flying in a st orm?

I a m experiencing commu nication difficulties

thr ough flying in a storm

Note: Att ention is invited to the possible

supplement ar y 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 th e h or izont al visibilit y

at...(place)?

The h orizont al visibility a t... (place) at...hours

is... (distance figures and units).

QBB What is the amount, type and height

above official a erodrome eleva tion of the

base of the cloud (at ...(place)?

The a mount , type an d height above official

aerodrome elevation of the base of the cloud

at... (place) at...hours is:

...eighth s (...type)

at...(figures and units)*

height above official aerodrome elevation.

*NOTE: The cloud a mount , type (if reported) an d vertical distan ce inform at ion is reported in sequen ce

if severa l cloud layers a re pr esent, t he order of reportin g being from low to high levels in accordan ce

with the following cloud layer specifications:

a) the lowest individual layer of any amount;

b) t he next h igh er in divid ua l la yer t h e a mou n t of wh ich is th r ee-eigh th s or m or e (t o t he

nearest eighth );

c) t h e n ext h igh er in divid ua l la yer t h e a mou n t of wh ich is five-eigh t hs or m or e (t o t h e

nearest eighth ).

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

QBC Repor t m et eor ologica l con dit ion s a s

observed from your aircraft at... (position

or zone) at...hours at...(figures and units)height above...(dat um).

The meteorological conditions as observed from

my air craft a t... (position or zone) at...hours

at...(figures and units) height above...(datum)are...

Note: The information may be given in AIREP,

or Q Code form. When given in Q Code, the

following sequen ce of Q signa l QBC an swer (or

advice) forms is used: QMX, QNY, QAO, QDF,

QMI, QFT and QNI.

QBD How much fuel have you remaining

(expressed as hours and/or minutes of

consumption)?

Fuel r emaining is...(hours an d/or m inut es of

consumption).

QBE I am about to wind in my aerial.

QBF Are you flying in cloud? I am flying in cloud a t ... (figures and units)

height above...(datum) (and I am ascending

(descending) t o...(figures an d u nits ) height

above that datum ).

QBG Are you flying above cloud? I am flying above cloud and a t ...(figures and

units) height above...(datu m)

or

Maintain a vertical distance of...(figures and

units) above cloud, smoke, haze or fog levels.


15/166

ACP 131(E)

DECODE


2A - 4


QBH Are you flying below cloud? I am flying below cloud and a t ...(figures and

units) height above...(datum).

or

Maintain a vertical distance of...(figures andun its) below cloud.

QBI Is flight under IFR compulsory

at ...(place) (or from...to...(place))?

Flight un der IFR is compu lsory at ...(place) (or

from...to... (place)).

QBJ What is the amount, type and height

above...(datum) of the top of the cloud

(at... (position or zone))?

At...hours at...(position or zone) the top of the

cloud is: am ount ...eighth s (...type) at ...(figures

and units) height above ...(datum).

QBK Ar e you flyin g wit h n o clou d in you r

vicinity?

I am flying with n o cloud in my vicinity a nd

at...(figures and units) height above ...(datum).

QBL

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

QBN Ar e you flyin g bet ween t wo la yer s of

cloud?

I am flying between two layers of cloud and

at...(figures and units) height above ...(datum).QBO What is t he n ear est aerodrome a t wh ich

flight under VFR is permissible and

which would be su itable for m y landing?

Flying un der VFR is perm issible at...(place)

which would be su itable for your la nding.

QBP Are you flying in and out of cloud? I am flying in and out of cloud and at

...(figures a nd u nits ) height a bove ...(datu m).

QBQ

QBR

QBS Ascend (or descend) to... (figures and units)

height above...(datu m) before encoun ter ing

instr um ent meteorological condit ions or if

visibility falls below... (figures and units of

distan ce) and a dvise.

QBT How far, a long the runway, from the

approach end, can the observer at the

run way threshold see the ru nway lights

which will be in opera tion for my lan ding

(at...(place))?

At...hours, the observer at the threshold of

run way number... could see the ru nway light s

in operation for your landing (at...(place)) for a

distance of...(figures and units) from the

approach end.

Note: If the sta tion inquired of is not equipped

to make the special observation requested, the

reply to QBT IMI is given by t he signa l QNO.

QBU

QBV Ha ve you r ea ch ed t he... (figu res a nd

un its) height above...(dat um ) (or... (ar ea

or place))?

I have reached the...(figures and units) height

above...(datum) (or...(area or place)).

or

Report reaching the...(figures and units)height above... (datum) (or...(area or place)).

QBW


16/166


17/166

ACP 131(E)

DECODE


2A - 6


QCV

QCW

QCX What is your fu ll ca ll sign? My full ca ll sign is...

orUse your full call sign until further notice.

QCY I am working on t ra iling aer ia l.

or

Work on tra iling aer ial.

QCZ

QDA

QDB Have you sent message...to...? I have sent message...to...

QDC

QDD

QDE

QDF Wh at is you r D-Va lu e a t...(posit ion )?

or

What is the D-Value at... (place or

position) a t...hours) for th e...millibar

level?

My D-Value at...(position) at... (figures and

units) height above the 1013.2 millibars datumis...(D-Value figures and units)... *(specify plus

or minus).

or

The D-Value at...(place or position) at hours for

th e...millibar level is...(D-Valu e figures an d

un its...*(specify plus or min us).

Note: When the tru e altitude (radio altitude)

is greater t han the pressure altitude PS (plus)

is used and when it is less MS (minus) is used.

QDG

QDH

QDI

QDJ

QDK

QDL Do you in ten d t o a sk me for a ser ies of

bearings?

I inten d to ask you for a ser ies of bear ings.

QDM Will you indicate the MAGNETIC

hea ding for m e to steer towards you (or...)

with no wind?

The MAGNETIC h eading for you t o steer t o

rea ch me (or...) with no wind was...degrees

(at...hours).

QDN

QDO

QDP Will you accept con t rol (or resp on sibilit y)

of (for)... now (or a t ...hours )?

I will accept cont rol (or resp onsibility) of

(for)...now (or at...hours).

QDQ

QDR What is my MAGNE TIC bear ing fromyou (or from...)?

Your MAGNETIC bear ing from m e (or from...)was...degrees (at... hours ).

QDS

QDT Ar e you flyin g in visu al m et eor ologica l

conditions?

I am flying in visual meteorological conditions.

or

Fly at all times in visu al met eorological

conditions.


18/166

ACP 131(E)

DECODE


2A - 7


QDU Cancel my IFR flight plan.

QDV Ar e you flyin g in a hor izon t al visibilit y of

less than... (figures and units)?

I am flying in a horizontal visibility of less

tha n... (figures a nd u nits) at ... (figures a nd

units) height above...(datum).QDW

QDX

QDY

QDZ

QE A Ma y I cr oss t he r un wa y a hea d of you ? You ma y cr oss t he r un wa y a hea d of me.

QEB May I turn a t the intersect ion? Taxi as follows at the in tersection...

(straight ahead DRT

turn left LEFT

tur n right RITE)

QEC May I make a 180-degree turn and ret urn

down the r unway?

You ma y make a 180-degree tur n an d retur n

down the runway.

QED Shall I follow the pilot vehicle? Follow the pilot vehicle.QEE

QEF Have I reached my parking area?

or

Have you r eached your parking a rea?

You have reached your parking area.

or

I have reached my park ing area.

QEG May I leave the parking area?

or

Have you left t he par king area?

You m ay leave the par king area.

or

I have left th e parking area.

QEH Ma y I move t o t he h oldin g posit ion for

run way number...?

or

Have you moved to the holding position

for r un way number ?

Clear ed to th e holding position for ru nway

number...

or

I have moved to th e holding position for

runway number...

QEI

QEJ May I assume posit ion for take-off?

or

Have you assumed position for take-off?

Cleared to hold at take-off position for runway

number...

or

I a m a ssu min g ta ke-off position for ru nway

number...and am holding.

QE K Ar e you rea dy for im media te t ak e-off? I a m r ea dy for im media te t ak e-off.

QEL Ma y I t ake-off (an d ma ke a ... ha nd t ur n

after take-off)?

You are cleared to take-off (turn as follows

aft er ta ke-off...).

QEM Wh at is t he con dit ion of t he la ndin g

surface at...(place)?

The condition of th e lan ding su rface at ...(place)

is...

Note: The informa tion is given by sending

appr opriate N OTAM Code groups.QEN Shall I hold my posit ion? Hold your posit ion.

QEO Sh all I clear th e ru nwa y (or la nding

area)?

or

Have you cleared the runway(or landing

area)?

Clear the runway (or landing area).

or

I have cleared the runway (or landing area).

QEP

QEQ


19/166

ACP 131(E)

DECODE


2A - 8


QER

QES Is a r ight-hand circuit in force

at...(place)?

A right-ha nd circuit is in force at ...(place).

QETQEU

QEV

QEW

QEX

QEY

QEZ

QF A Wh at is t he met eor ologica l for eca st

for...(flight, route, section of route or

zone) for the period...hours until ...hours?

The meteorological forecast for...(flight, route,

section of route or zone) for the period...hours

un til hours .is

Note: When the forecas t is given in Q Code

th e following sequence of Q signa l an swer (or

advice) forms is to be given: QAO, QMX, QMI,QNY, QBA, QMW, QFT and QNI.

QFB The...

1) approach

2) runway

3) approach and run way

light s ar e out of order.

QFC What is the amount , the type and the

height above...(datu m) of th e base of the

cloud at ...(place, position or zone)?

At...(place, position or zone) the base of the

cloud is... eighths...type at...(figures and units)

height above... (dat um).

Note: If several cloud layers or ma sses ar e

present, the lowest is reported first.

QF D 1) I s t he...visu a l bea con (a t ...(pla ce)) in

operation?

2) Will you switch on th e... visua l beacon

(at...(place))?

3) Will you extinguish th e aer odrome

visual bea con (at...(place)) unt il I ha ve

landed?

1) The ...visual beacon (at ... (place)) is in

operation.

2) I will switch on the... visua l beacon

(at...(place)).

3) I will extinguish th e aerodrome visual

beacon (at... (place)) unt il your land ing is

completed.

QF E (At...(place)) wha t is the present

atmospheric pressure at official

aerodrome elevation?

At...(place) the a tmospher ic pressur e a t official

aerodrome elevation is (or was observed

at...hours to be) ...millibars.

QF F (At...(place)) wha t is t he present

atmospheric pressure converted to mean

sea level in a ccordance with

meteorological practice?

At...(place) th e at mospheric pressu re converted

to mean sea level in accordan ce with

meteorological practice is (or was determined

at...hours to be) ...millibars.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 .

or

Please light the aerodrome lights.

QF J

QF K

QF L


20/166

ACP 131(E)

DECODE


2A - 9


QF M What height above..(datum)...

1) should I maint ain?

2) are you mainta ining?

3) do you inten d cru ising at ?

1) Maint ain (or fly at )... (figures an d un its)

height above...(dat um).

2) I am maint aining...(figures and un its)

height above ...(dat um).3) I intend cruising at... (figures an d units)


QF N

QFO May I land immediately? You may land immediately.

QF P Will you give me t he la test in for ma tion

concerning... facility (at...(place))?

The latest information concerning...facility

(at... (place)) is as follows...

Note: The informa tion is given by sending

appr opriate N OTAM Code groups.

QF Q Ar e t he a ppr oa ch an d r un wa y ligh ts lit ? Th e a ppr oa ch an d r un wa y ligh ts a re lit .

or

Please light th e approach an d run way lights.

QF R Does m y la ndin g gea r a ppea r da ma ged? You r la ndin g gea r a ppea rs da ma ged.QF S Is t he...r adio fa cilit y a t...(pla ce) in

operation?

The...radio facility at...(place) is in operation

(or will be in operation in...hours).

or

Please ha ve th e...radio facility at ...(place) put

in operation.

QF T Bet ween wha t h eigh ts above...(da tu m)

ha s ice forma tion been observed

(at...(position or zone))?

Ice format ion h as been observed at

...(position or zone) in the type of...and with an

accretion rate of...between...(figures and units)

and...(figures and units) h eights

above...(datum).

QF U What is th e magn etic direction (or

nu mber) of the ru nway to be used?

The magnetic direction (or number) of the

run way to be used is...

Note: The run way number is indicated by atwo-figure gr oup an d th e ma gnetic direction by

a three-figure group.

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

or

Please switch on t he floodlights.

QF W What is th e lengt h of t he r un way in use

in...(units)?

The lengt h of run way...now in us e is...(figures

and u nits).

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

aerial.

or

Work on a fixed aer ial.

QF Y P lea se r epor t t he pr esen t m et eor ologica l

landing conditions (at...(place)).

The p resent meteorological la nding conditions

at ...(place) are...

Note: When given in Q Code th e inform at ion is

sent in the following sequence: QAN, QBA,

QNY, QBB, QNH, an d/or QF E a nd, if

necessa ry, QMU, QNT, QBJ. It is not

norma lly necessar y to pr ecede th e QAN, QBA,

QNY an d QBB informat ion by t hese Q signa ls

but this m ay be done if considered desira ble.


21/166

ACP 131(E)

DECODE


2A - 10


QF Z Wh at is t he a er odr ome met eor ologica l

forecast for...(place) for the period...hours

until...hours?

The aerodrome meteorological forecast

for...(place) for t he period...hours un til...hour s

is...

Note: When given in Q Code th e followingsequence of Q signal answer (or advice) forms

is t o be used: QAN, QBA, QNY, QBB and, if

necessary, QMU, QNT and QBJ.

QGA

QGB

QGC There are obst ruct ions to the... of runway...

QGD Ar e t her e on my tr ack any obstr uct ions

whose elevation equals or exceeds my

altitude?

There are obstructions on your track ...(figures

and units) height above...(datum).

QGE Wh at is my dist an ce t o you r st at ion (or

to...)?

Your distance to my station (or to...)

is...(distance figures and units).

Note: This signal is norma lly used inconjun ction with one of th e signals QDM,

QDR, QTE or QUJ .

QGF

QGG

QGH May I land usin g... (procedu re or

facility)?

You may land using...(procedure or facility).

QGI

QGJ

QGK What t rack should I make good?

or

What t rack ar e you m aking good?

Make good a track from...(place) on ...degrees

...(true or magnetic).

or

I am making good a track from...(place) on...

degrees... (tr ue or magn etic).

QGL Ma y I en ter th e...(con tr ol a rea or zon e)

at (place)?

You may en ter th e...(cont rol area or zone)

at...(place).

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

QGN Ma y I be clea red to la nd (a t...(pla ce)? You ar e clea red to la nd (a t... (pla ce).

QGO Landing is prohibited a t ... (place).

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

QGQ May I hold at ...(place)? Hold at ...(place) a t ...(figures and units) height

above... (datum) and await orders.

QGR

QGS

QGT Fly for...minutes on a heading that will enable

you to maintain a track reciprocal to yourpresent one.

QGU Fly for ...minutes on a magnetic heading

of...degrees.

QGV Do you see me?

or

Can you see th e aerodrome?

or

Can you see...(aircra ft)?

I see you at...(cardinal or quadrantal point of

direction). or

I can see the aerodrome

or

I see...(aircraft).


22/166

ACP 131(E)

DECODE


2A - 11


QGW Does my la ndin g gea r a ppea r t o be down

and in place?

Your landin g gear appear s to be down an d in

place.

QGY

QGZ Hold on...direct ion of... facility.QH A

QH B

QH C

QH D

QH E Will you in for m m e wh en you a re on ...leg

of approach?

I am on...

1) cross-wind leg

2) down-wind leg of app roach.

3) base leg

4) final leg

QH F

QH G Ma y I en ter tr affic cir cu it at ...(figu res

and units) height above...(datum)?

Cleared to enter traffic circuit at...(figures and

units) height above...(datum).QH H Ar e you ma kin g a n emer gen cy la ndin g? I am ma kin g a n em er gen cy la ndin g.

or

Emergency landing being made at...(place).

All aircra ft below...(figures an d u nits ) height

above...(dat um ) and with in a d ista nce of...

(figures a nd un its) leave...(place or hea dings)

QHI Are you (or is...)...

1) waterborne?

2) on land?

I am (or...is)...athours.

1) waterborne

2) on land

QH J

QH K

QH L

QH M

QH N

QH O

QH P

QH Q Ma y I ma ke a...a ppr oa ch (a t...(pla ce))?

or

Are you making a... approach?

You ma y ma ke a ...appr oach (at... (place)).

or

I am making a...approach.

QH R

QH S

QH T

QH U

QH V

QH W

QH X

QH Y

QHZ Sh all I circle t he a erodrome (or go

around)?

Circle the aerodrome (or go around).

QIA

QIB


23/166

ACP 131(E)

DECODE


2A - 12


QIC May I establish communicat ion with

...ra dio sta tion on...kH z. (or...MHz.) now

(or at ...hour s)?

Establish communication with...radio station

on...kHz. (or...MHz.) now (or at ...hour s).

or

I will establish communication with ...radiosta tion on...kHz (or..MHz) now (or at ...hour s)

QID

QIE

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

QIG

QIH

QII

QIJ

QIK

QIL

QIM

QINQIO

QIP

QIQ

QIR

QIS

QIT

QIU

QIV

QIW

QIX

QIY

QIZQJ A Is my...

1) tape)

2) mar k and space) reversed?

Your...

1) tape)

2) mar k and space) is reversed.

QJ B Will you use...

1) radio?

2) cable?

3) telegraph?

4) teletypewriter?

5) telephone?

6) receiver?

7) transmitter?

8) reperforator?

I will use...

1) radio.

2) cable.

3) telegraph.

4) teletypewriter.

5) telephone.

6) receiver.

7) transmitter.

8) reperforator.

QJ C Will you check your ...

1) transmitter distributor?

2) auto-head?

3) perforator?

4) reperforator?

5) printer?

6) printer motor?

7) keyboard?

8) an tenn a system?

I will check my...

1) transmitter distr ibutor.

2) auto-head.

3) perforator.

4) reperforator.

5) printer.

6) printer motor.

7) keyboard.

8) an tenn a system.


24/166

ACP 131(E)

DECODE


2A - 13


QJ D Am I t r ansmit t ing...

1) in letter s?

2) in figur es?

You are transmitting...

1) in letter s.

2) in figures.

QJ E Is my frequency shift ...1) too wide?

2) t oo na rr ow?

3) correct?

Your frequen cy shift is...1) too wide.

2) too na rr ow (by...Hz).

3) correct.

QJ F My signal as checked by monitor ...is

satisfactory...

1) locally.

2) a s radiat ed.

QJ G Shall I revert to automatic relay? Revert to automatic relay.

QJ H Sha ll I run...

1) my test tape?

2) a test senten ce?

Run...

1) your test tape.

2) a test senten ce.

QJ I Will you t ransmit a cont inuous...1) mark?

2) space?

I am tra nsmitting a continuous...1) mark.

2) space.

QJ J

QJ K Are you receiving...

1) a continuous mar k?

2) a continuous space?

3) a mark bias?

4) a space bias?

I am receiving...

1) a continuous mar k.

2) a continuous space.

3) a mar k bias.

4) a space bias.

QJ L

QJ M

QJ N

QJ O

QJ P

QJ Q

QJ R

QJ S

QJ T

QJ U

QJ V

QJ W

QJ X

QJ Y

QJ Z

QKA

QKB

QKC The sea condit ions (a t ...posit ion)....

1) perm it alightin g but not ta ke-off.

2) render alighting extremely hazar dous.

QKD

QKE


25/166

ACP 131(E)

DECODE


2A - 14


QKF May I be relieved (at ... hours)? You may expect to be relieved a t ...hours by...1)

aircraft... (identification) (type...). 2) vessel

whose call sign is... (call sign) (and/or whose

na me (is...(name)).QKG Will relief take place when

...(ident ificat ion) esta blishes...

1) visual,

2) comm un icat ions, conta ct with

survivors?

Relief will take place when... (identification)

establishes...

1) visual,

2) commu nicat ions, cont act with sur vivors .

QKH Repor t det ails of t he pa ra llel sweep

(track) search being (or to be) conducted?

or

In the parallel sweep (track search being

(or to be) conducted, what is (are).

1) th e direction of sweeps,

2) the separat ion between

3) th e height a bove th e datum , employed

in the search pattern?

The pa ra llel sweep (tr ack) search is being (or

to be) conducted...

1) with dir ection of sweeps...degrees... (true or

magnetic).

2) with...(distance figures sweeps, and units)

separation between sweeps.

3) at a h eight of... (figures) above... (dat um ).

QKI

QKJ

QKK

QKL

QKM

QKN Aircraft plotted (believed to be you) in

position...on track....degrees at...hours.

QKO Wh at ot her un it s a re (or will be) t akin g

par t in t he opera tion (...(identificat ion ofoperation))?

In th e operat ion (...(ident ificat ion)) the

following units are (or will be) takingpart...(name of units).

or

...(nam e) unit is ta king par t in operat ion (...

(identification)) (with effect from... hour s).

QKP Which pat tern of search is being

followed?

The search pattern is...

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

QKR

QKS

QKT

QKU

QKV

QKW


26/166

ACP 131(E)

DECODE


2A - 15


QKX

QKY

QKZ

QL A

QLB Will you mon it or ...st at ion an d r epor t

regarding r ange, qua lity, etc.?

I have monitored...station and report (briefly)

as follows...

QL C

QLD

QL E

QLF

QLG

QLH Will you use simu lt an eous keyin g

on...frequen cy and...frequen cy?

I will now key simult an eously on...frequ ency

and...frequency.

QL I

QL J

QLKQLL

QL M

QLN

QLO

QLP

QLQ

QL R

QL S

QLT

QLU

QLV Is t he...r adio fa cilit y st ill r equ ir ed? Th e...r adio fa cilit y is st ill r equ ir ed.

QLWQLX

QLY

QLZ

QMA

QMB

QMC

QMD

QME

QMF

QMG

QMH Shift to transmit and receive on ...kHz (or

MHz); if commu nication is n ot esta blishedwithin 5 minut es, revert to present frequency.


27/166

ACP 131(E)

DECODE


2A - 16


QMI Repor t t he ver tica l dist ribu tion of clou d

(at ...(position or zone)) as observed from

your aircraft.

The vert ical dist ribut ion of cloud as observed

from my aircraft at...hours at... (position or

zone) is: lowest layer Observed *...eighths

(...type) with base of...(figures an d u nits ) andtops of...(figures an d u nits ) (*and s imilarly in

sequence for each of the layers observed.)


Exam ple: = QMI 1400 11 2 CU 1000 FT 2500

FT 6 SC 6000 F T 10000 FT 5 AC 13000 FT

14000 FT ALT =

QMJ

QMK

QML

QMM

QMN

QMOQMP

QMQ

QMR

QMS

QMT

QMU What is the surface temperature

at ...(place) an d wha t is t he dew point

temperature at that place?

The sur face temper atu re a t...(place) at ...

hours is...degrees and the dew point

temperature at t hat t ime and place

is...degrees.

QMV

QMW At ...(p os it ion or zon e) wh at is (a r e) t he

height(s) above...(datu m) of the zero

Celsius isotherm(s)?

At...(position or zone) t he zero Celsius

isotherm(s) is (are) at...(figures and units)

height(s) above ...(datum).

QMX What is the a ir temperature (a t ...

(position or zone)) (at...hours) at the...

(figures and units) height above...

(datum)?

At...(position or zone) at... hours th e a ir

tempera tur e is...(degrees and units) at ...

(figures a nd u nits) height above...(datu m).

Note: Aircraft report ing QMX informa tion will

transmit the temperature figures as corrected

for airspeed.

QMY

QMZ Have you any amendmen ts to the flight

forecast in respect of section of route yet

to be traversed?

The following amendm ent (s) should be ma de to

the flight forecast... (If no amendments, signal

QMZ NIL.)

QN A

QN BQN C

QN D

QN E Wh at in dica tion will m y a lt im et er give on

landing at...(place) at...hours, my

sub-scale being set t o1013.2 millibars

(29.925 inches)?

On landing at...(place) at... hours, with your

sub-scale being set to 1013.2 millibars (29.92

inches), your altim eter will indicate...(figur es

and u nits).

QN F

QN G


28/166

ACP 131(E)

DECODE


2A - 17


QNH Wh at sh ou ld I set on th e su b-sca le of my

altimeter so that the instrument would

indicat e my elevation if I were on th e

ground a t your st ation?

If you set t he su b-scale of your a ltimeter to

read...millibars (or hun dredth s of a inch*), th e

instrument would indicate your elevation if

you were on the ground at my stationat.. .hours.

Note: When th e setting is given in

hun dredths of an inch t he a bbreviation "INS"

is used to identify the units.

QNI Bet ween wha t h eigh ts a bove...(da tu m)

has turbulence been observed

at ...(position or zone)?

Turbu lence has been observed a t...(position or

zone) with an inten sity of...between ...(figures

and units) an d...(figures an d un its) heights

above...(datum).

QN J

QN K

QN L

QN MQN N

QNO I am not equipped to give the information (or

provide the facility) requested.

QN P

QN Q

QNR I am approaching my point of no return.

QN S

QNT What is the maximum gust speed of the

surface wind at...(place)?

The ma ximum gust speed of the su rface wind

at ...(place) at... hours is...(speed figur es an d

units).

QN U

QN V

QN W

QN X

QNY What is the present weather and the

intensity thereof at...(place, position or

zone)?

The present weather a nd intensity thereof

at...(place, position or zone) at...hours is... (See

Notes a) and b)).

Notes:

a) When present weath er information is

tran smitted by a ground st ation, the

information shall be selected from the present

weather table (Table III) in PANSMET (Doc

7605- MET/526). If none of th ese cond itions

prevail the reply shall be QNY NIL.


29/166


30/166

ACP 131(E)

DECODE


2A - 19


QOM On wh at fr equ en cies ca n you r vessel be

reached by a selective call?

My vessel can be reached by a selective call on

the following Frequency(ies)... (periods of time

to be added is necessary).

(MARITIME USE ONLY)QON to

QOS

The ser ies QON to QOS inclusive is reserved for th e Mar itime Services.

QOT Do you hear my call; what is the

appr oximate d elay in minut es before we

may exchange traffic?

I hear your call; the approximate delay is ...

minutes.

(MARITIME USE ONLY)

QOU to

QQZ

The ser ies QOU to QQZ inclusive is reserved for t he Mar itime Ser vices

QRA What is the name of your stat ion? The name of my sta t ion is...

QRB How fa r a ppr oxima tely a re you fr om my

station?

The approximate distance between our stations

is...na ut ical miles (or...kilomet ers).

QRC By wha t privat e enterprise (or State

administra tion) ar e account s for char gesfor your st at ion set tled?

The accounts for charges of my station are

settled by the private enterprise...(or Stateadministration).

QRD Wh er e ar e you bou nd a nd wh ere a re you

from?

I am bound for...from...

QRE Wha t is your est ima ted t ime of ar riva l

at... (or over...) (place)?

My estimated time of arrival at...(or over...)

(place) is...hours .

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

or

Return to...(place).

QRG Will you tell m e m y exa ct fr equ en cy (or

that of...)?

Your exact frequency (or that of...) is...kHz (or

MHz).

QRH Does my frequency vary? Your frequency var ies.

QRI How is t he tone of my t ra nsmission? The t on e of you r tr ansmission is...

1) good.

2) variable.

3) bad.

QRJ How ma ny r adioteleph on e ca lls h ave you

to book?

I have...radiotelephone calls to book.

QRK Wh at is t he in telligibilit y of m y sign als

(or those of...)?

The intelligibility of your signals (or those of...)

is...

1) bad.

2) poor.

3) fa i r .

4) good.

5) excellent.

QRL Are you busy? I am busy (or I am busy with...). P lease do notinterfere.

QRM Are you being interfered with? I am being interfered with

1) nil

2) slightly

3) moderately

4) severely

5) extremely.


31/166

ACP 131(E)

DECODE


2A - 20


QRN Are you troubled by stat ic? I am t roubled by sta t ic

1) nil

2) slightly

3) moderately4) severely

5) extremely.

QRO Shall I increase transmitter power? Increase t ransmitter power.

QRP Shall I decrease t ransmitter power? Decrease t ransmitter power.

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

QRR Ar e you r ea dy for a ut om at ic oper at ion ? I am r ea dy for a ut om at ic oper at ion . Sen d

at...words per minu te.

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

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 Sh all I in for m...t ha t you ar e ca llin g h imon...kHz(or MHz).

Please inform...that I am calling him on...kHz(or MHz).

QRX When will you call me again? I will ca ll you again at ...hours (on...kHz (or

MHz).

QRY What is my turn?

(Relates to commu nication.)

Your t urn is nu mber...(or according to any

other indication). (Relates to commu nication)

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

QSA What is the strength of my signals (or

those of...)?

The s tr ength of your signals (or th ose of...) is...

1) scarcely percept ible.

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 est imated dr ift of the

sur vival craft?

The estimated drift of the survival craft

is...(figures and units).

QSF Have you effected rescue? I have effected rescue and am proceeding

to...base (with... persons injured requiring

ambulance).

QSG Shall I send...telegrams at a t ime? Send...telegrams at a t ime.

QSH Are you able to home on your D/F

equipment?

I am able to home on my D/F equipm ent (on

station...).

QSI I have been unable to break in on your

transmission.or

Will you inform ...(call sign) th at I h ave been

una ble to break in on h is tran smission

(on...kH z. (or...MHz)).

QSJ What is the charge to be collected

to...including your internal telegraph

charge?

The cha rge t o be collected to... including my

intern al telegraph charge is...fra ncs.


32/166

ACP 131(E)

DECODE


2A - 21


QSK Can you hear me between your signals

and if so can I break in on your

transmission?

I can h ear you between my signals; break in

on my transmission.

QSL Can you acknowledge receipt? I am acknowledging receiptQSM Sh all I r epea t t he last telegra m which I

sent you(or some previous telegram)?

Repeat t he last t elegram which you sent me

(or telegram(s) number(s)...).

QSN Did you hea r m e (or ... (ca ll sign )) on ...

kHz (or MHz)?

I did hea r you (or...(call sign )) on...kHz (or

MHz).

QSO Ca n you com mu nica te wit h... dir ect or by

relay?

I can communicate with...direct(or by relay

through...).

QSP Will you relay to...free of charge? I will relay to...free of charge.

QSQ H ave you a doct or on boa rd (or is...(n am e

of person) on board)?

I have a doctor on board (or... (name of person)

is on board ).

QSR Sha ll I repeat the ca ll on the callin g

frequency?

Repeat your call on th e calling frequen cy; did

not h ear you (or ha ve interference).

QSS Wh at wor kin g fr equ en cy will you u se? I will u se t he wor kin g fr equ en cy...k Hz(normally only the last three figures of the

frequency need be given).

QST

QSU Sh all I sen d or reply on th is fr equ en cy (or

on... kHz (or MHz)) (with emissions of

class...)?

Send or reply on this frequency(or on...kHz (or

MHz)) (with emiss ions of clas s...).

QSV Shall I send a series of V's on this

frequency (or...kH z (or MHz))?

Send a series of V's on this frequency (or

on...kHz (or MHz)).

QSW Will you sen d on th is fr equ en cy (or

on...kHz (or MHz)) (with emissions of

class...)?

I am going to send on this frequency (or

on...kHz (or MHz)) (with emissions of class...).

QS X Will you lis ten t o...(ca ll s ign (s )) on ...k Hz

(or MHz)?

I am listening to...(call sign(s)) on...kHz (or

MHz).

QSY Shall I change to t ransmission on

another frequency?

Change to tr ansmission on a nother frequency

(or on...kHz (or MH z)).

QSZ Sh all I send each wor d or group more

than once?

Send each word or group twice(or...times).

QTA Shall I cancel telegram number ...? Cancel telegram number ...

Q TB Do you agree with m y coun t ing of words? I do not agree with your coun t ing of words ; I

will repeat th e first letter or digit of each word

or group.

Q TC H ow m an y t elegr am s h ave you to sen d? I h a ve...t elegr a ms for you (or for ...).

QTD Wha t ha s th e r escue vessel or rescu e

aircraft recovered?

...(identification) has recovered

1) ...(number) survivors.

2) ...wreckage.3) ...(number) bodies.

QTE What is my TRUE bear ing from you?

degrees (at ...hours ).

or

What is my TRUE bearing from... (call

sign)? or

What is the TRUE bearing of...(call sign)

from...(call sign )?

Your TRUE bearing from me is...

or

Your TRUE bear ing from...(call sign) was

...degrees (at...hours).

or

The TRUE bearing of...(call sign) from...(call

sign) was...degrees at...hours.


33/166

ACP 131(E)

DECODE


2A - 22


QTF Will you give me th e posit ion of my

station according to the bearings taken

by the D/F stations which you control?

The position of your sta tion a ccording to th e

bearings ta ken by the D/F stat ions which I

cont rol was... latitu de... longitude (or other

indication of position), class ...at ...hour s.QTG Will you sen d t wo da sh es of t en secon ds

each followed by your call sign

(repeated...times) (on...kHz (or MHz))?

or

Will you request ...to send two dash es of

ten seconds followed by h is call sign

(repeated...times) on... kHz (or MHz)?

I am going to send t wo dashes of ten seconds

each followed by my call sign (repeated

...times ) (on...kHz (or MH z)).

or

I ha ve requested...to send t wo dashes of ten

seconds followed by his call sign (repeated...

times) on...kHz (or MHz).

QTH What is you r posit ion in lat itu de and

longitude (or... according to any other

indication)?

My position is...latitude longitude (or according

to an y other in dicat ion).

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

QTJ What is your speed?

(Requests t he speed of a ship or a ircraft

through aircraft through the water or air

respectively.)

My speed is...knots (or... kilometers

or...stat ute miles per hour). (Indicat es the

speed of a ship or th e water or air

respectively.)

QTK Wh at is the speed of you r aircr aft in

relation to the surface of the earth?

The speed of my aircraft in relation to the

surface of the earth is...knots (or...kilometers

or...stat ute miles per h our).

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

QTM Wha t is your MAGNETIC heading? My MAGNE TIC h ea din g is...degr ees.

QTN At what t ime did you depart

from...(place)?

I depa rt ed from...(place) at ...hour s.

QTO Are you airborne?

or

Have you left dock (or port )?

I am a irborne.

or

I have left dock (or port).QTP Are you going to alight (or land)?

or

Are you going to enter dock (or port)?

I am going to alight (or la nd).

or

I am going to enter dock (or port).

QTQ Ca n you commun icat e with my st at ion by

mean s of th e intern at iona l code of

signals?

I am going to communicate with your station

by mean s of th e inter na tional code of signals.

QTR What is the correct t ime? The correct t ime is...hours.

QTS Will you sen d you r ca ll sign for t un in g

pur poses or so tha t your frequency can be

meas ur ed now (or a t...hours) on...kHz (or

MHz)?

I will send m y call sign for t un ing pur poses or

so that my frequency may be measured n ow

(or at ...hour s) on...kHz (or MHz).

QTT The identification signal which follows issuperimposed on another tra nsmission.

QTU What are the hours during which your

station is open?

My station is open from... to...hours.

QTV Shall I stand guard for you on the

frequency of...kHz(or MHz)

(from...to...hours)?

Stand guard for me on the frequency of...kHz

(or MHz) (from...to...hours).

QTW Wh at is t he con dit ion of su rvivor s? Su rvivor s a re in ...con dit ion a nd u rgen tly

need...


34/166

ACP 131(E)

DECODE


2A - 23


QTX Will you keep you r st at ion open for

further communication with me until

further notice (or until...hours)?

I will keep my stat ion open for fur th er

commu nication with you u nt il furt her notice

(or until... hours).

QTY Ar e you pr oceedin g t o t he posit ion of incident and if so when do you expect to

arrive?

I am proceeding to the position of incident an dexpect t o arr ive at...hours (on...date).

QTZ Are you cont inuing the search? I am cont inuing the search for .. (aircraft , sh ip,

survival craft,. survivors or wreckage).

QUA Have you news of... (call sign)? Here is news of...(ca ll sign).

QU B Ca n you give me in th e followin g or der

information concerning: the direction....

in degrees TRUE an d speed of th e sur face

wind; visibility; present weather; and

amoun t, type a nd h eight of base of cloud

above surface elevation at...(place of

observation)?

Here is th e informa tion r equested (The un its

used for speed a nd dist ances should be

indicated.)

QU C Wh at is t he n umber (or ot her in dica tion )

of the last message you received from

me(or fr om...(call s ign))?

The nu mber (or other indication) of the last

message I received from you (or from... (call

sign)) is...

QU D Ha ve you received t he u rgen cy sign al

sent by... (call sign of mobile station)?

I have received the urgency signal sent

by...(call sign of mobile st at ion) a t...hours.

QU E Ca n you u se t eleph on y in ... (la ngu age),

with int erpr eter if necessar y; if so, on

what frequencies?

I can use telephony in... (language) on...kHz

(or MHz).

QU F H ave you r eceived t he dist ress sign al sen t

by... (call sign of mobile sta tion)?

I have received the distress signal sent

by...(call sign of mobile st at ion) a t...hours.

QU G Will you be for ced t o a ligh t(or la nd)? I a m for ced to a ligh t (or la nd) im media tely.

or

I will be forced to alight (or la nd) a t... (positionor place) at...hours.

QUH Will you give m e t he pr esen t ba rom et ric

pressu re at sea level? Aeronau tical Note:

Stat ions of the interna tional a eronautical

telecommu nication ser vice will int erpr et

this signal as: What is the present

atmospheric pressure at the present

water level?

The present bar ometric pressure at sea level

is...(units). Aeronautical Note: Stations of the

international aeronautical telecommunication

service will interpr et t his signal a s: The

present at mospheric pressure at the present

water level at... (place or position) at ...hour s

is...(figures and units).

QUI Ar e you r n aviga tion light s wor kin g? My na vigat ion ligh ts ar e working.

QUJ Will you indicate the TRUE track to

reach you (or...)?

The TRUE track to reach me (or...) is...degrees

at.. .hours.

QU K Ca n you tell m e t he con dit ion of t he seaobserved at... (place or coordinates)? The s ea at ...(place or coordin at es) is...

Aeronau tical Note: Sta tions of th e intern at iona l aeronau tical telecommun icat ion service will complete

the answer, information or advice form by the use of a numbered alternative as given hereunder,

selected a ccording to the a verage wave height a s obtained from th e larger well formed waves of th e wave

system being observed. If observed height coincides with one of the limits, r eport t he lower nu mbered

alternative, e.g. waves with a mean maximum height of 4 meters are to be reported as "5".


35/166

ACP 131(E)

DECODE


2A - 24


Nu m b er H eigh t

Me t e r s F ee t (a p p r ox.)

0 Calm-glassy 0 01 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 observedat...(place or coordinates)?

The swell at...(place or coordinates) is...

Aeronau tical Note: Sta tions of th e intern at iona l aeronau tical telecommun icat ion service will complete

the answer, information or advice form by the use of the following numbered alternatives:

Nu m b e r Len gt h of Sw e ll H eigh t Nu m b er Le n gt h of Sw e ll H eigh t

0 - - 5 Long Moderate

1 Short or Average Low 6 Short Heavy

2 Long Low 7 Average Heavy

3 Shor t 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 quandrantal point abbreviation N, NE, E, SE,

etc. following the n umber ed alter na te for indicatin g swell condition. The descriptions in th e above

numbered alternatives are as follows:

Leng th o f Sw e l l

Me t e r s F ee t (Ap p r ox.)

Short 0 - 100 0- 300

Average 100 - 200 300 - 600

Long Over 200 Over 600

H eigh t o f Sw e llMe t e r s F ee t (Ap p r ox.)

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

an d height of the swell waves can not be determ ined, the n umber ed alter na tive "9" is used.


36/166

ACP 131(E)

DECODE


2A - 25


QUM May I resume normal working? Normal working may be resumed.

QU N Will vessels in my im media te vicin it y (or

in the vicinity of...latitude ...longitude(or

of...)) please indicate their position, TRUEcourse an d speed?

Aeronautical Notes:

a) All stations of the international

aeronautical telecommunication service

will inter pret t his signal (in par t) as

referring to TRUE TRACK.

b) English-speaking stations of the

mar itime mobile service ma y interpr et

this signal (in part ) as referring to TRUE

HEADING. When commu nicating with

such stations it is recommended that t hat

supplementary use be made of the signal

QTI to avoid any misun derstan ding.

My position, TRUE cour se an d speed a re...

Aeronautical Notes:

a) All stations of the international aeronautical

telecommunication service will interpret this

signal (in par t) as r eferr ing to TRUE TRACK.

b) English-speaking stat ions of the mar itime

mobile service may interpret this signal (in

part) as referring TRUE HEADING. When

commu nicating with such st ations it is

recommended tha t supplementar y use be made

of th e signal QTI t o avoid an y

misunderstanding.

QUO Shall I search for ...

1) aircraft,

2) ship,

3) survival craft,

in the vicinity of... latitude...longitude (or

according to an y other indication)?

Please search for...

1) aircraft,

2) ship,

3) survival craft,

in the vicinity of...latitude... longitude (or

according to a ny oth er in dicat ion).

QU P Will you in dica te you r posit ion by...

1) searchlight?

2) black smoke trail?

3) pyrotechn ic lights?

My position is indicated by...

1) searchlight.

2) black smoke trail.

3) pyrotechn ic lights.

QUQ Shall I t ra in my searchlight near ly

vertical on a cloud, occulting if possibleand, if your aircraft is seen or heard,

deflect the beam up wind and on the

water (or lan d) to facilitat e your landin g?

Please train your searchlight on a cloud,

occulting if possible and, if my aircraft is seenor h eard, deflect t he beam u p wind and on t he

water (or land) to facilitate my landing.

QUR Have survivors...

1) received survival equipment ?

2) been picked up by rescue vessel

3) been reached by ground rescue party?

Survivors...

1) are in possession of sur vival equipmen t

dropped by...

2) have been picked up by r escue vessel.

3) have been reached by ground rescue party.

QU S Ha ve you sigh ted su rvivor s or wr ecka ge?

If so, in wha t position?

Have sighted...

1) survivors in wat er,

2) survivors on rafts,

3) wreckage, in position... lat itud e... longitu de

(or according to any other indication).


37/166


38/166

ACP 131(E)

2B - 1


DECODE

SECT ION B - Z SIGNALS


ZAA You are not observing proper circuit discipline.

ZAB Your speed key is improperly adjusted.

ZAC Cease using speed key.

ZAD Your operat ing signal (made a t ...) received

as...(1. Not u nder stood; 2. Not held).

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

ZAF Will you pa tch me t hr ou gh to... (via you

or...)?

I am about to patch you through to...(via...).

ZAG Break...(1. Go ahead with next tape; 2. Go

back...feet; 3. Advan ce your key t ape t o

reference mark number and repeat last

tra nsmission (or tr ansm ission...).ZAH Unable to relay message...in present form

(1. Not in prescribed format; 2. Format

lines ...incorrect ; 3. No on -line facility

available; 4. Call signs not encrypted; 5. Text

not en crypted). We file. Tran smit corr ectly

prepar ed messa ge to all add ressees (or to...).

ZAI Run...(1. Caller; 2. Test tape;

3. Synchronizing ta pe; 4. Traffic tape;

5. Marking signals; 6. Spacing signa ls;

7. Reversals; 8. Run teletypewriter space bar

signals; 9. Date1 test at....bd).

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

ZAK Transmission on...kHz (or MHz) suspendedun til...(or wa s su spended at ...) on a ccount of

electrical hazards (or...)

ZAL I am closing down (unt il...) due to....

ZAM I am unable to obtain reply from teleprinter

switchboard...(for connection to...). Request

you call him (or other intermediate

switchboard) for me.

ZAN Transmit only messages of and above

precedence...

ZAO I cannot understand your speech. Use

radiotelegraph.

ZAP Sh all I wor k...(1. Simplex; 2. Du plex;3. Diplex; 4. Multiplex; 5. Single Side-

band; 6. With automatic error correction

system; 7. Without aut omatic error

correction system; 8. With time a nd

frequency diversity modem)?

Work...(1. Simplex; 2. Duplex; 3. Diplex; 4.Multiplex; 5. Single Sideban d; 6. With

automatic error correction system; 7. Without

automatic error correction system. 8. With

time a nd frequen cy diversity modem).

ZAQ The last word (or group)... (1. Received from

you wa s...; 2. Tran smit ted t o you was...).


39/166

ACP 131(E)

DECODE


2B - 2


ZAR This is my...request (or reply). (1. First ;

2. Second; 3. Third; etc.).

ZAS Rerun a ll tapes run on...since...

1) Your presen t frequency;2) ....kHz (or MHz);

3) Call sign...;

4) This chann el or...cha nn el.

ZAT Am preparing traffic (perforating tape) for

transmission.

ZAU What is teletype range taken on my

signal(s)?

Teletype range taken on your signal(s) is...to...

ZAV Transmit traffic for me (or for...) by broadcast

method until further directed (or until...).

ZAW Sh all I t ra nsmit 12 in ch es of bla nk t ape

at sh ort intervals at... words per minu te?

Tran smit 12 inches of blank t ape at short

intervals at ...words per minu te.

ZAX You are...1) Cau sing inter ference. Listen before

sending;

2) Caus ing inter ference by inat ten tion to

order to wait;

3) Sendin g at th e sam e time as...(call sign);

4) Caus ing delay by slowness in an swering;

5) Cau sing delay by slowness in answering my service or proceduremessages;

6) Answering out of tu rn .

ZAY Transmit t raffic to me (or to...on ...kHz (or

MHz)) without waiting for receipts. I (or...) will

receipt for traffic later (on...kHz (or MHz))ZAZ One or more transmit ters, simultaneously

keying on t his broadcast , are defective but

tra nsmission will continue on rema ining

tra nsmitt ers. Traffic so tran smitted will be

repeat ed when full service is rest ored.

ZBA What is cause of delay (or of bad

transmission)?

Delay (or bad transmission) due to ...

ZBB For following message you will require a total

of...copies.

ZBC You are transmit t ing a cont inuous ...

(1. Mark; 2. Space).

ZBD Will you repea t wh at you (or ...) sen t

(at...)?

Following is what I (or...) sent (at...).

ZBE Retransmit message... to... (for ...)

(1. Action; 2. Information).

ZBF For following message use large message

forms.


40/166

ACP 131(E)

DECODE


2B - 3


ZBG You are transmitt ing in upper case.

ZBH Make preliminary ca ll before t ransmit t ing

traffic.

ZBI Listen for radiotelephony.ZBJ What are the est imated errors per

thousan d chara cters in my signals(or

those of .)?

The estimated errors per th ousan d printed

char acter s in your signals (or th ose of...) is

1) Greater tha n 13

2) 7 to 12

3) 1 to 6

4) Nil

ZBK Ar e you receivin g my t ra ffic clea r? I a m r eceivin g you r t ra ffic... (1. Clea r; 2.

Garbled).

ZBL Am unable to receive you while I am

transmitting. Do not use break-in-procedure.

ZBM Place...on watch on th is frequency.

acp131 operating sigs

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