From psimpson@isd.3com.com Fri Mar 28 09:43:02 1997 Received: from ISD.3Com.com (chipcom.com [192.41.247.9]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id JAA01254 for ; Fri, 28 Mar 1997 09:42:55 -0500 (EST) X-Received-x: from ISD.3Com.com (chipcom.com [192.41.247.9]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id JAA01254 for ; Fri, 28 Mar 1997 09:42:55 -0500 (EST) From: psimpson@isd.3com.com Received: from pheasant.chipcom.com (pheasant.isd.3com.com) by ISD.3Com.com (4.1/SMI-4.0) id AA07916; Fri, 28 Mar 97 09:41:32 EST Received: by pheasant.chipcom.com (4.1/SMI-4.1) id AA24025; Fri, 28 Mar 97 09:42:42 EST Date: Fri, 28 Mar 97 09:42:42 EST Message-Id: <9703281442.AA24025@pheasant.chipcom.com> To: wmcfadde@oucsace.cs.ohiou.edu Status: RO Army Z Signals courtesy Doug Faunt, N6TQS Question Answer, Advice or Order ZAA You are not observing proper circuit discipline. ZAB Your speed key is improperly adjusted. 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 transmission...). ZAH Unable to relay message...in 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 to... 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 precedence... - 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 channel or...channel). 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) is...to... 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 restored. - 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 message...to... (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 Your...is 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)...? as...group(s). ZBU Report when you are in radio communication with... ZBV Answer me (or...) on...kHz (or MHz). ZBW Will you shift (or ask...to I am (or...) is shifting to transmit shift) to transmit on...kHz on...kHz (or MHz). (or MHz). ZBX Will you shift (or ask...to 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 only). 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 corruption). 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 message...to 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 forthcoming. 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. number)? 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 delay. ZDO I could not send message...to... ZDP Hold my message...until correctness is confirmed. ZDQ Message...was relayed to...at... 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 from...to... (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 until...). ZDZ On...(date) message(s) was (were) mailed to...(command(s)) bearing serial numbers... ZEA Pass plain language copy to...by 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 data). ZED The following confirmatory inform- ation as received is at variance with the text. ZEE Request message...be 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 at...). 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 signal. 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 obtained. ZEQ Your message...has been missent to this station...(1. Request you re- transmit to correct addressee; 2. I will retransmit to correct addressee). 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 retransmission. ZET Message has been protected and no further action by...is 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 number...). 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) (BASEGRAM) 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. 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 (or...). 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... 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 Message...is 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 message...as channel number... ZFX Channel number (or station serial number)...is 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 of...is...(1. 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...is or has been) calling you (on...kHz (or MHz)). 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 for...). ZGM Did you (or...) hear...at...? I have (or...has) been unable to communicate with...(since...). ZGN When was I (or...) last heard? Nothing heard from you (or...) (since...). 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 numbers. ZIB Two messages...and... (or Change station serial number of group counts and time of message...to read number...OR origin...and...), both Assign to message...station serial received as serial number... number... What are correct serial numbers? 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 number(s). ZIF I (or...) did not use serial number(s). ZIG Is (are) number(s)... (to...) Number(s)...(to...) is (are) blank. blank? ZIH Repeat headings of message number ...to...transmitted 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 background). 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 (or...is) 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 received. - 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- ception). ZJQ Repeat signal (or message...) the senior officer (senior officer present afloat) (or ship indicated) is now transmitting or is about to transmit. 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 (or...is) 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 MHz)). ZKG Observe (or direct...to obeserve) schedule with...on...kHz (or MHz) (at...). ZKH Did you (or...) observe I (or...) observed schedule with schedule with...at...? ...(at...). ZKI Set watch on...kHz (or MHz)... (1. Continuous; 2. Until further notice). 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 MHz)). ZKN I have taken over guard on...kHz (or MHz). 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 (or...is) radio guard for... for... (on...kHz (or MHz))? (on...kHz (or MHz)). ZKQ Indicate ships or stations for which you are (or...is) guard. (1. Radio (on...kHz (or MHz)); 2. Visual). ZKR On what frequencies are you I am (or...is) 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 (or...is) maintaining continuous watch, or (1. Single operator period; 2. Two operator period; 3. General periods only; 4. Reduced single- operator period) on...(callsign)... Broadcast. ZKV I am (or...is) 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 pictures). 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- ceiver). 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. (facility)? 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...) at...(time). 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)) (from...to...kHz (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- sign...). 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 involved. 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 authenticated). ZNR This message may be forwarded without change by radio or non-approved circuit. 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 message... ZOC Station(s) called relay this message to addressees for whom you are responsible. 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...) to...now (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 message...in 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 (to...). 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 area(s)...). 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 follow(s). 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 by... ZOW Broadcast this message at special watchkeeping periods for ships with (1. One radio operator; 2. Two radio operators). - Page 24 - Question: Answer, Advice or Order: ZOX Place this message (or message...) on submarine broadcast indicated by following specific broadcast designator(s)... 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 decryption. 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 reperforator). ZPS -Unassigned- ZPT This transmission is a transmitter pre-acceptance trial. Request expeditious strength and readability reply. 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 number). ZPV If the earlier wind warnings ident- ified by DTG(s) following this signal are awaiting transmission, file those warnings without further trans- mission. ZPW This message cancelled at time indicated. File without further transmission. 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 (or...is)...at...(time). (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 the...radio 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). channel(s). - Page 28 - Question: Answer, Advice or Order: ZRP Transfer signal on channel...to channel... 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 for...minutes. 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- teletypewriter). 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. My...is faulty). ZTD Shall I use...? Use... ZTE Are you (or is...) able to I am (or...is) able to use... use...? ZTF Are repairs completed? Repairs completed. ZTG ...(class of emission/type of transmission). 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 (or...is) connected to... to...? ZTL Are you (or is...) about to I am (or...is) about to disconnect. 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) fast. 2. 150 milliseconds (7.5 units) correct. 3. 152 milliseconds (7.6 units) slow. 4. ... erratic per character. 45.5 Baud Equipment ------------------- 1. 161 milliseconds (7.35 units) fast. 2. 163 milliseconds (7.42 units) correct. 3. 165 milliseconds (7.5 units) slow. 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... ZUC From...to... 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 indicated. 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 (or...channel/circuit termination(s) of this designated) are...(1. Secured for channel (or...channel/circuit Restricted; 2. Secured for Confid- designated)? ential; 3. Secured for Secret; 4. Secured for Top Secret). ZVF This channel (or...channel/circuit 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 stations. 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 required. ZWM Correct answer to last question (or question...) is...(or will be found in...). 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 messages. 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...) to...in 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 is...). 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 signal. ZXX This message has been delivered to all information addressees whose designations follow this operating signal. 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 Sign). 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 that...is 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 call. 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 speeds... 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 -