https://declassified.library.utoronto.ca/files/original/bbb5d5e0697ac88be2cb054d9a6a6acf.pdf 5c4b3421618baba715908af13351c6ff PDF Text Text Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information --1.4- * • RESTRICTED >tf°o 2723-2(DCommS) MEMORANDUM 29 Jun 65 DCommP2 COMMUNECATION INSTRUCTIONS HYDRA SERVICE PROCEDURES (HSP 101) lo The Working Group, as directed under paras 19., 20.a., and 21.a., of 0 2723-2(DCommP) dated 27 May 65, assembled; and the proposed changes to HSP 101, as outlined in Annex A to this letter, are recommended. 2. These proposed changes to HSP 101 include more than the essential changes which must be made in order to pass traffic through STRSD i.e., Start of Message Indicator, Routing Instructions, and End of Message Indicator,. They include the essential changes which must be made to ensure the proper handling, and recording, of traffic through STRAD and contain the following: a. To include Transmission Identification (TI) that incorporates a channel number which identifies the direction of traffic flow between two stations- Reason: To prepare equipment to receive Start of Message Indicator, to check continuits' of channel numbers, and to accommodate Top Line monitoring in recording a message received,, b« To include a Security Warning Prosign - line 1, during message alignment. Reason: To assist STRAD in the selection of a channel over which the transmission can be made. c. To include Routing Line Segregation as opposed to Pre-determined Routing. Reason: To prevent traffic being returned over routes from which it was received and thus prevent the setting-up of barred routes. To accommodate revised procedures for the handling of Missent messages and self-addressed channel checks. d. In Multiple call messages, to remove the repeated Precedence Prosign preceding each routing indicator except the first in format line 2. Reason: To permit the recognition of routing instructions by STRAD. e. To include the T.H.I. in format line 3 (a part of message identification) as opposed to format line 9» Reason: To accommodate Top Line monitoring, which monitors and records to the end of format line 3, so that it may include the complete Message Identification in format line 3» f. To prohibit manual cadence - keyboard transmission into STRAD. Reason: To prevent automatic termination of a transmission (ZXB) that is interrupted for a pause greater than 30 seconds. To prevent STRAD being programmed to cater to manual cadence. Manual cadence requires the complete message being received and stored prior to transmission and thus prevents the message being transmitted in segments of half tracks as received, RESTRICTED OttA 9 / <C 000104 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information * • - 2 RESTRICTED 3„ Since HSP 101 was written along the procedures contained in an earlier edition of ACP 127 and these procedures were changed on the implementation of ACP 127(C) to accommodate automatic relay equipment, it was necessary to include such changes in the proposed amendments to HSP 101. In the main, those changes affect the following procedures: a. b» c. do Cancellations of interrupted transmissions0„ Action to be taken on. receipt of a Missent message. Action to be taken on receipt of a Misroute message. Action to be taken on receipt of a message containing channel number discrepancies. e. The handling of messages transmitted "Subject to Correction". f„ Request for corrections and retransmissions, A. The amendments to HSP 101 as proposed in Annex A are based on procedures as revised by ACP 127(C) Communication Instructions Tape Relay Procedures, and on the meaning to operating signals as revised by ACP 131(B) Communication Instructions Operating Signals, 5, Annex B - Automatic Equipment (STRAD) - is included to amplify and substantiate the reasons, given above, for the proposed changes to HSP 101. 6. The essential changes in Hydra procedures contained in the Canadian Supplement to Hydra Service Publication 101, can not be identified or proposed at this time. It will be necessary, first, to learn to what degree concurrence is given to the proposed changes to HSP 101; and, second, to become familiar with the operations and capibilities of the installation being made, at Carp, to accommodate the Hydra System. (WYR. Smith) Captain Chairman, Hydra Procedure Working Group 2-6188 ccs F/L Capt Mr. Mr 0 A.M. WoTo CoG. G.Wo MacKenzie HQ CFCS Lawson 701 Comm Sqn Gardner Ottawa Wireless Station Cook HQ CFCS RESTRICTED 000105 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information RESTRICTED * ANNEX A TO 0 2723-2(DCommS) 0 2723-4 •••'•- PROPOSED CHANGES TO COEMUNICATION INSTRUCTIONS HYDRA SERVICE PROCEDURES HSP 101 1. Forward Page, page III, para after United Kingdom, - amend to read: in co-ordination with the Director General of Communications, Canadian Forces Headquarters as joint operators of the Hydra System. 2. after Washington USA, and before, Or Diplomatic Wireless Service, - amend to read: Commander, Headquarters Canadian Forces Communication System (HQ CFCS) Ottawa Canada. Forward Page, page III, para 5b.: 3. Table of Contents, Pages V - IX: - amend accordingly. A. para 103: after second word (examples) first line, and before the word (shown) first line, - add: and diagrams. 5. para 105a.(1): - amend to read: All messages shall be preceded by 5 spaces, the appropriate Security Warning Prosign, 2 carriage returns and 1 line feed. The 5 spaces shall be transmitted; tape feed out functions preceding the 5 spaces shall not be transmitted. 6, para 108a« - amend to read: Messages handled over the Hydra Services, shall be prepared in accordance with the schematic diagram shown in para 109» 1 7. para 109: PARTS FORMAT LINE H E; A D I N G H E A D I N G - amend diagram as follows: CONTENTS EXPLANATION % Transmission Identification; Security warning prosign; Pilot - Pilot contains; Repeated precedence prosign tsk\ Routing indicator(s); prosigns, operating signals and address designations *** as required. Handling Instructions Line - always contains Transmission Identification (which includes the "start of message indicator" when necessary); also contains pilot(s) as required to convey specific message handling instructions. Repeated precedence prosign **; Routing indicator(s) of Station(s) responsible for delivery. Basic Routing Line - repeated precedence prosign **; Routing indicator(s) of Station(s) responsible for delivery. Prosign DE; designation of station calling; Station Serial Number; Filing Time; Date separated by slant from hour and minutes expressed in digits followed by zone suffix. Filing time is the date and time the message was filed with the communication centre. ,./2 RESTRICTED 000106 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information 4 TR H B A D I N G H E A D I N G T E X T E N D I N G ED PAGE 2 TO ANNEX A TO 0 2723-2(DCommS) 0 2723=4 Precedence prosign(s); date and time expressed in digits, and zone suffix; operating signal(s). Contains the precedence prosign once and in case of dual precedence both will be shown separated by a space; the date time group (T.OoOo) and originator's message instructions in the form of operating signals, i.e., ZFF. Prosign FM; originator's designation. Contains the prosign FM and the designation of the originator which may be indicated by plain language, or address group. Prosign TO; Address group(s) operating signal(s) address designation(s). Contains the prosign TO; the repeated precedence prosign (and/or the precedence in words when plain language is used) for each action address e e ^ ) ; the designation of the action addressee(s) in the form of plain language, or address group(s). It may also contain operating signal(s) i.e., ZDB<£ O Prosign INFO; Address group(s), operating signal(s), address designate ion(s). Contains the prosign INFO; the designation of the information addressee(s) in the form of plain language, or address group(s). It may also contain operating signal(s). Internal instructions; thought or idea as expressed by the originator. Contains the text of the message which may contain message handling instructions as well as the thought or idea as expressed by the originator. Group count designation; accounting symbol. Contains the prosign GR:(encrypted messages will carry a numerical group count, plain language messages may carry an approximate numerical group count, i.e., ten groups per line). Accounting symbol. (2CR)(8LF)NNNN (12 LTRS) The NNNN in this sequence is the end of message indicator. A Included only when required for clarity. AA If message is dual precedence, only the higher precedence is shown in this line. AAA Plain language designations are not permitted in codress messages. . • •-/3 RESTRICTED 000107 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information * RESTRICTED . PAGE 3 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 8. para 112.; - amend to read: a. Messages may be assigned two precedences. The higher precedence prosign only will appear as the first element in format line 2. b. When dual precedence is indicated, the high precedence prosign will appear first separated by a space in format line 4. c. The appropriate precedence prosign will appear before each address group in format line 6, 9. para 115,: - delete para 115 and substitute new para 115 as follows: 115 Approved Channel One approved to carry classified clear text messages. 10, para 122.: - after para 122, add new para and number para 123 as follows: 123 Channel Serial Three numeral characters which serve to sequentially number each transmission and which start at one (ool) on a daily basis. 11. Re-number: - re-number paras 123, 124» 125 and 126 to read: paras 124, 125, 126 and 127 respectively. 12. para 127.: - after para 127 (Missent Message), add new para 128 as follows: 128 Non-approved Channel One which may carry only encrypted text or authorized unclassified clear text messages. 13. Re-number: - re-number paras 127 (Open Number), 128 (T.O.O.), 129 (Pilot) and 130 (Plaindres® Message) to read: paras 129, 130, 131 and 132 respectively. 14. para 132,: - after para 132 (Plaindress Message), add new paras 133, 134, 135 and 136 as follows: 133 Routing Indicator A five letter group assigned to stations responsible for the delivery and distribution or relay of messages. 134 Security Warning Prosign(s) A two letter prosign used in format line 1 to indicate whether a message need be transmitted over an approved channel or may be transmitted over a nonapproved channel. ../4 RESTRICTED 000108 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information RESTRICTED * PAGE 4 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 • 135 Start of Message Indicator (SOM) - ZCZC An indicator employed to activate automatic message switching equipment. It is required on messages passing into or through automatic switching systems to indicate the start of a message. 136 Start of Transmission Function The letters and key functions (i.e., W 3 spaces) which immediately precede the Channel Number, or the letter (i.e., V) which immediately precedes the Start of Message Indicator (ZCZC). • •', 15. Re-number: - re-number para 131 (Service Message) and para 132 (Station Serial Number) to read: para 137 and para 138 respectively. 16. para 138.: - after para 138 (Station Serial Number), add new para 139 as follows: 139 Transmission Identification The collection of letters, figures and machine functions which identifies a transmission from one station to the next station in a relay route. It precedes the Start of Message Function and consists of the Start pf Transmission Function, the Start of Message Indicator (when used) and the Channel Number,. in that order. 17. Re-number: - re-number para 133 (Tributary Stations) to reads para 140, 18. paras 134 140 Spare: - delete entry 134 - 140 Spare. 19. para 141: •<• after prosign GR, and before prosign IMI, add prosign HH as follows: HH 20. para 141: f 21. para 142: This message must be transmitted over an approved channel. - after prosign TO, and before prosign WA, add prosign UU as follows: UU This message may be transmitted over a non-approved channel. - opposite ZAI, amend entry to read: Ruh...(l. Caller; 2. Test tape; 3. Synchronizing tape; 4. Traffic tape; 5, Marking signals; 6, Spacing signals; 7, Reversals; 8. Run teletypewriter space bar signals). O 60 0/ J RESTRICTED 000109 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information RESTRICTED * . PAGE 5 TO .ANNEX A TO 0 2723-2(DCommS) 0 2723-4 - opposite ZDF, amend entry to. read: Message ... was received by ...(addressee designation) at ... Z or was (1. Received by action addressee(s) at Z; 2, Received by information addressee(s) at ... Z; 3. Received by all addressees at ... Z; 4. Received by action addrepsee(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. - opposite ZDG, amend entry to read: Accuracy of following message(s) or (Message ...) is doubtful. Correction or confirmation will be forthcoming. - after ZDG, add: ZDH Request corrected copy of message ... be forwarded wO 0 e o - opposite ZEL, amend entry under Answer Column to read: This message is a correction (to message ...)(transmitted by ...) Note: May only be used in conjunction with ZDG. - opposite ZEN, amend entry to read: This message has been delivered by a separate transmission or by other means (1. Messenger/Courier 5 2. Mail) to the addressee(s) immediately following this operating signal. - after ZEN, add: ZES Your message ... has been received ... (1. incomplete; 2. Garbled). Request retransmission. - opposite ZFF, amend entry to read: Inform me when this message (or message ...) has been received by ... (addressee designation) or by ... (1. Action addressee(s); 2, Information addressee(s); 3. All addressees; 4. Action addressee's/addressees' message centre; 5. Information addressee's/addressees8 message centre; 6. All addressees' message centre). - opposite ZFQ, delete entry and substitute new entry under Answer Column as follows: Two messages, .... and ..., received under channel number (or station serial number) ... Both released. - ZFS, delete this operating signal and entry. 9t(i/O RESTRICTED 000110 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information RESTRICTED * PAGE 6 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 . - opposite ZFT, delete entry and substitute new entry under Answer Column as follows: Message ,., received without channel number (or station serial number) following message bearing channel number (or station serial number) ... Message released. •* opposite ZFU, delete entry and substitute new entry under Answer Column as follows: Channel numbers ... and ... preceded message ... Lower number recorded and higher number blanked, - opposite ZFV, delete entry and substitute new entry under Answer Column as follows: Message ... containing channel number ... separated by portions of the message, released subject to correction. Take necessary action to provide corrected copy. - opposite ZFX, delete entry and substitute new entry under Answer Column as follows: Channel number (or station serial number) ... is open. - opposite ZIE, amend entry to read: 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). - opposite ZOE, amend entries to read as follows: Question Can you accept message for ...? Answer Give me your message, I will dispose of it. - after ZWL, add new operating signal ZXB as follows: ZXB 22. para 202a. Example.: Called statioa(s) obtain a complete copy of this interrupted transmission by addressing a service message to the originating station. - amend Example to read as follows1 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES )UU(2CR)(LF). Opposite (LINE 3) delete DE ALKLTC 2K/06 and substitute; DE ALKLTC 2K 06/1230Z. Line (LINE 9) delete entire entry ((LINE 9) 061230Z (2CR)(LF)). Line (LINE 10) amend (LINE 10) to read; (LINE 9 ) . 23. para 202b. - amend Explanation to read as follows: Explanation.s sub para (1) amend to read; (5 SPACES)UU(2CR)(LF). a o • 0/ RESTRICTED ( 000111 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information ESTRICTED PAGE 7 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 sub para (a) delete the period at end of sentence and add; and the relay of it through semi-automatic and automatic systems. after sub para (a) add new sub para (b) as follovis: (b) UU is the Security;Warning Prosign. Re-number sub para (b) to read sub para (c). sub para (3) after (LINE 3) amend to read; "DE ALKLTC 2K 06/1230Z." sub para (b) amend "ALKLTC 2K/06" to read; "ALKLTC 2K". after sub para (b) add new sub para (c) as follows: (c) "O6/123OZ" is the date and time the message was received by the communication centre. sub para (10) delete sub para (10) and all detail. sub para (li) re-number to read; sub para (10) and amend (LINE 10) to read (LINE 9 ) . sub para (12) re-number to read; sub para (11). para 203a. Example,; - amend Example to read as follows: 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR)(LF). Opposite (LINE 3) after DE HUPDL add; 16/2014Z. Line (LINE 9) delete entire entry. Line (LINE 10) amend (LINE 10) to read; (LINE 9 ) . para 203b. - amend Explanation to read as follows: Explanation: sub para (2) after (LINE 3) amend to read; DE HUPDL 16/2014Z. sub para (2) in sub para (2) after sub para (b) add new sub para (c) as follows: (c) "16/2014Z" is the date and time the message was received by the communication centre. sub para (9) delete sub para (9) and all detail. sub para (10) re-number to read; sub para (9) and amend (LINE 10) to read (LINE 9) ..../8 RESTRICTED �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information * PAGE 8 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4^ -: r,.. • 26. para 205a, Example,: - Amend Example to read as follows: 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR)(LF). Opposite (LINE 3) delete DE HCPJW 14/12 and substitute; D E HCPJW 14 12/1503Z. Line (LINE 9) delete entire entry. Line (LINE 10) amend (LINE 10) to read; (LINE 9 ) . 27. para 205b, Explanation: - amend Explanation to read as follows: sub para (1) amend to read; (5 SPACES)UU(2CR)(LF). sub para (a) delete the period a t end of sentence and add; and the relay of i t through semi-automatic and automatic systems, after sub para (a) add mew sub para (b) as follows: (b) UU is the Security Warning Prosign. Re-number sub para (b) to read sub para (c). sub para (3) after (LINE 3) amend to read; Dl HCPJW 14 I2/I503Z. sub para (b) amend "HCPJW 14/12" to read; "HCPJW 14". after sub para (b) add new sub para (c) as follows: (c) "12/1503Z" is the date and time the message was received by the communication, centre. sub para (10) delete sub para (10) and all detail. sub para (11) re-number to read; sub para (10) and amend (LINE 10) to read (LINE 9 ) . 28, para 205c Example.: - amend Example to read as follows: 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR)(LF). opposite (LINE 2) delete PP HCPFN RR HCPFW and substitute ; PP HCPFN HCPFW. opposite (LINE 3) delete DE ANXL0T 39B/14 and substitute; DE ANXLOT 39B 14/1255Z. Line (LINE 9) delete entire entry. ; : Line (LINE 10) amend (LINB^IO) to read; (LINE 9) 79 ED 000113 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information RESTRICTED * PAGE 9 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 . 29. para 205d. Explanation. -amend Explanation to read as follows: sub para (4) amend (LINE 10) to read; (LINE 9 ) . 30. para 205e. Example.; - amend Example to read as follows: 1st line delete (5 SPAGES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR){LF). opposite (LINE 2) delete RR HCPFO RR HCPFW and substitute; RR HCPFO HCPFW. opposite (LINE 3) delete DEB ASOLTG F3/11 and substitute; DE ASOLTC F3 11/1700Z. Line (LINE 9) delete entire entry. Line (LINE 10) amend (LINE 10) to read; (LINE 9 ) . >|l 31. para 205f. Explanation, I I I. M l — M — - amend Explanation to read as follows: sub para (1) amend to read; (5 SPACES)UU(2CR)(LF). sub para (a) delete the .period, at .end of sentence and add; and the relay of it through semi-automatic and automatic systems. after sub para (a) add new sub para (b) as follows: (b) UU is the Security Warning Prosign. Re-number sub para (b) to read sub para (c). sub para (2) after (LINE 2) amend to read; RR HCPFO HCPFW. , sub para (a) amend to read; "RR" is the repeated precedence prosign. sub'para (3) after (LINE 3) amend to read; DI ASOLTG F3 11/1700Z. sub para (b) amend "ASOLTC F3/11" to read; "ASOLTC F3". after sub para (b) add new sub para (c) as follows: (c) "II/I70OZ" is the date and time the message was received by the communication centre. sub para (10) delete sub para (10) and all detail. sub para (11) re-number to read; sub para (10) and amend (LINE 10) to read (LINE 9 ) . ,./10 RESTRICTED 000114 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information D * . 32, para 206e. Example Part One.: PAGE 10 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 - amend Example to read as follows: 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR)(LF). opposite (LINE 3) delete DE ABOLTC 14/09 and substitute; DE ABOLTC 14 O9/I8OOZ. Line (LINE 9) delete entire entry. Line (LINE 10) amend (LINE 10) to read; (LINE 9 ) . 33. para 206e. Example Part Two,: T amend Example to read as follows: 1st line delete (5 SPACES)(2CR)(LF) and substitute; (5 SPACES)UU(2CR)(LF). opposite (LINE 3) delete DE ABOLTC 15/09 and substitute; DE ABOLTC 15 09/1800Z. Line (LINE 9) delete entire entry. Line (LINE 10) amend (LINE 10) to read (LINE 9 ) . 34. chapter 3 page 3-d. J - amend heading to read: Chapter 3 - Routing and Relay of Messages - Section I General. 35. paras 301, 302.: - delete paras 301 and 302 and substitute,; 301. Relay of Single Call Messages - When properly prepared at the originating station, a single call message requires no reprocessing during tape relay, 302. Relay of Multiple Call Messages: (a) Relay of multiple call messages is accomplished by routing line segregation. (b) Each multiple call message starts out from the originating station as a single transmission containing in format line 2 all of the routing indicators required to effect transmission to all tributary stations responsible for delivery to any of the addressees. (c) Each subsequent station is responsible for ensuring that the message is forwarded (and/or returned) to all stations called in the routing line of the transmission as received by that station. (d) Each linking station which must forward the message over more than one transmission path shall segregate the routing line. Each new transmission shall contain in the routing line only those routing indicators pertinent to that transmission. (e) Each tributary station receives the message as a single call message routed to the routing indicator of that station. a o o e/il RESTRICTED 000115 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information 4 PAGE 11 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 • (f) The following examples show the relay of a single call and a multiple call message: REFER TO NETWORK DIAGRAM PAGE 3-5 (1) A single call message as prepared by HCPFW and transmitted to HCPAO for relay VZCZCPMA011 (5 SPACES )UU(2CR)(LF) RR HCPFO DE HCPFW 73 09/1705Z R 091632Z FM AECLOS TO RR ANSLOZ (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(2LF) W W W 0 9ft• 0 (2) by HCPAO to HCPFO for delivery -W ( 3 SPACES )MQA015( 5 SPACES)UU( 2CR) (LF) RR HCPFO (2CR)(LF) DE HCPFW 73 O9/I7O5Z (2CR)(LF) R 091632Z (2CR)(LF) FM AECLOS (2CR)(LF) TO RR ANSLOZ (2CR)(2LF) 6uCo e 0 0 o (3) A multiple call message as prepared by HCPFW and transmitted to HCPAO for relay VZCZCPMA018(5 SPACES)UU(2CR)(LF) RR HCPFN HCPFO HUPDL DE HCPFW 96 11/1802Z R 111745Z FM AECLOS -t TO RR ACELYZ RR ANSLOZ RR ARQLOP 6jwC«eoe« (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2GR)(2LF) ' (4) by HCPAO to HCPFN for delivery W ( 3 SpACES)MNA045(.5 SPACES )UU(2CR)(LF) RR HCPFN (2CR)(LF) m HCPFW 96 11/1802Z (2CR)(LF) R 111745Z (2CR)(LF) FM AECLOS (2CR)(LF) TO RR ACELYZ RR ANSLOZ RR ARQLOP (2CR)(2LF) etc, ' o o o o 0 (5.) by HCPAO to HCPFO for delivery W ( 3 SPACES)MQA022(5 SPACES)UU(2CR)(LF) RR HCPFO (2CR)(LF) DE HCPFW 96 11/1802Z (2CR)(LF) R 111745Z (2CR)(LF) FM AECLOS (2CR)(LF) TO RR ACELYZ RR ANSLOZ RR ARQLOP (2CR)(2LF) etc< ' o e 0 00 0 0 0 0 / Xic RESTRICTED 000116 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information * PAGE 12 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 • (6) by HCPAO to HUPDL for relay W ( 3 SPACES)MBA121(5 SPACES)UU(2CR)(LF) RR .HUPDL (2CR)(LF) DE HCPFW 96 11/1802Z (2CR)(LF) R 111745Z (2CR)(LF) FM AECLOS (2CR)(LF) TO RR ACILYZ RR ANSLOZ RR ARQLOP (2CR)(2LF) 6wC00000 • (7) by HUPDL for relay or delivery to ARQLOP (line 6 ) . Note (a) There are two systems of distributing traffic from linking stations: (1) HCPAO - Distribution made in accordance with Routing Indicator located in the routing lines (format line 1 or 2). (2) HUPDL - Distribution made in accordance with address groups located in the address lines (format lines 6 and 7 ) . (b) Traffic from HUPDL to HCPAO will carry the appropriate Routing Indicator in the routing line in order that HCPAO can effect delivery. (c) Traffic from HCPAO to HUPDL need only carry the one routing indicator (HUPDL) as delivery will be effected by use of the address group(s) located in lines 6 and 7. 36. para 303.5 - delete sub paras (b), (c), (d) and (e) and substitute: (b) When a station has agreed to accept traffic for alternative routing: (1) The message(s) shall be transmitted without new handling instructions; i.e., no pilot, (2) Subsequent relaying shall be accomplished through normal channels without further requests, (3) All traffic accepted for alternative routing shall be transmitted in order of receipt and precedence. It shall not be treated separately from other traffic. (c) When the alternative route is no longer required, the requesting station shall so advise the other station concerned. (d) Example of Alternative Routing - refer to Network Diagram page 3-5• (1) Situation: HCPAO has an Operational Immediate message for HCPFN but has temporarily lost its normal route. 0 0 0 0 / X. j RESTRICTED 000117 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information j RESTRICTED PAGE 13 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4: 'i "-''-:- (2) HCPAO asks HCPFW to act as an alternative route: W (3 SPACES)MPA023(5 SPACES)UU(2CR)(LF) 00 HCPFW (2CR)(LF) DE HCPAO 25 15/1525Z (2CR)(2LF) UNCLAS SVC INT ZOE HCPFN (2CR)(8LF) (4N's)(l2LTRS) Note: Precedence of request shall be the same as the highest precedence message awaiting transmission. (3) HCPFW has the capability to act as an alternative route and answers; VZCZCPMA045(5 SPACES)UU(2CR)(LF) 00 HCPAO DE HCPFW 27 15/1527Z . UNCLAS SVC ZOB HCPFN y ' '' r': 37. para 403.5 (2CR)(LF) (2CR)(2LF) (2CR) {8LF) (4N's)(12LTRS) - delete para ,403 and substitute:.,, 403 Transmission/Message Identification a. Transmission Identification (TI) - A transmission identification is required in the heading of each message to provide a means of maintaining continuity of traffic. (l) When sent by automatic numbering devices, the transmission identification shall consist of the following characters in the sequence indicated!; (a) By station transmitting directly into, fully automatic linking stations: (V)(START OF MESSAGE INDICATOR ZCZC)(3 STATION AND CHANNEL LETTERS)(1 FIGURES SHIFT)(3 NUMERAL CHARACTERS)(1 LITTERS SHIFT) Example: VZCZCABC(FIGS)027(LTRS) Explanation: 1, The letter V is required to ensure that the first character of intelligence is not lost or garbled. 2*, ZCZC is the start of message indicator. It must appear once (and only once) in each transmission introduced directly into an automatic relay station. 3, ABC are the station and channel designator letters of the station making the transmission. • o « « / i./f RESTRICTED 000118 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information 4 ED • PAGE 14 TO ANNEX A TO 0 2723-2(DComraS) 0: 2723-4'••?5&t'-"'5 4. The FIGS shift is operated once to ib'h'i'ft the equipment from lower to tipper case to receive the channel ierial which follows. 5. 027 is the channel serial. 6. The LTRS shift is operated once to bring the equipment back to lower case. (b) By stations transmitting directly into manual or semi automatic linking stations: (W)(3 SPACES)(3 STATION AND CHANNEL LETTERS)(1 FIGURES SHIFT)(3 NUMERAL CHARACTERS) (1 LITTER SHIFT) Example: ' W(3 SPACES)ABC(FIGSJ027(LTRS) Explanations Same as the explanation under paragraph (a) above except that W ( 3 SPACES) are used instead of V to provide machine synchronization. The start of message indicator ZCZC is not used. (2) Transmission identification to be sent by means of a detached number tab ahead of each message shall be prepared as indicated in paragraph.(a) and (b) above,-'as applicable, except that 8 to 12 LTRS shall follow the channel serial to provide the means for detaching a single number tab from a roll. (3) Since alteration of the format for transmission identification prescribed above will cause the message involved to be rejected by fully automatic relay equipment, any variation of this component must be avoided. (4) Station and channel letters (see channel number) shall be derived in accordance with supplements to HSP 101 as authorized and distributed to stations concerned. b. Message Identification - This is a combination of letters and figures used to identify a message between communication centres. It will normally consist of the following components in sequence taken from format line 3« (1) The routing indicator. (2) The station serial number. (3) The filing time/time handed in. Example: HCPFW 96 11/1802Z 0 o 0 0 / J-P RESTRICTED �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information RESTRICTED * • 38. para 406.: PAGE 15 TO ANNEX A TO 0 2723=2(DCommS) 0 2723-4 - amend last sentence to read as follows: Open numbers shall be reported as they occur. 39. para 407.: - delete and substitute new para as follows: 407 Tape Preparation a. Errors made during tape preparation in format lines 1, 2 or 3 shall not be corrected; the incorrect tape shall be discarded and a new tape prepared. b. When perforating original tapes, errors made in other than format lines 1, 2 or 3 shall be corrected by backspacing the tape and obliterating the error by use of the (LTRS) key. c. Errors made in the end of message functions shall be corrected by backspacing and obliterating the entire end of message functions. 40. para 408,: - delete and substitute new para as follows: 408 Keyboard Transmission a. During keyboard transmission errors made in the message heading shall not be corrected. The incorrect transmission shall be cancelled by transmitting the error prosign followed by the end of transmission prosign and the end of message functions (E1EEEEEE1AR(2CR)(8LF)(4N's) (12LTRS). Transmission of the message shall then recommence. b, During keyboard transmission when an error is detected during original transmission of the message text, the operator shall correct the error by transmitting the error prosign after the error. Transmission shall then be resumed by repeating the last correctly transmitted Word or group and continuing with the message text (IN ACCORDANCE WITH MESSG Z 1 I 1 I I I 1 WITH; MESSAGE SENT ETC .....). NOTE: Keyboard transmission is not permitted when working into an automatic linking station. Pauses during transmission which exceed the length of pause permitted by the automatic equipment will cause the transmission to be automatically terminated during the pause. The remainder of that transmission, made after the pause (not being preceded by the start of message functions VZCZC), will be ignored. 41. para 410,: - delete sub para i., and renumber sub para j., t© read i. ..../l6 RESTRICTED 000120 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi syr faeces a {'information f RESTRICTED 42. para 411a. (1) PAGE 16 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 -r add the following sentences to the end of the para: The same channel number shall NOT be used on a succeeding transmission. A record of cancellation shall be made. 43. para 411a.(2) - delete and substitute new para (2) as follows: (2) The operating signal ZXB (repeated) will be used in place of the prosign EEEEEEEE AR by an automatic linking station to indicate to the called station that the transmission has been interrupted. The called station shall then request a complete copy from the calling station. This will necessitate the interrupted transmission being forwarded as for a complete transmission through the system to the called station, 44. para 411a.(3) - delete example and substitute new example as follows: Example: VZCZCBMA125(5 SPACES)UU(2CR)(LF) RR HCPAO (2CR)(LF) DE HUPDL 104 12/1645Z . (2CR)(LF) ZFR BMB 112 ALKLTC 2K 06/1230Z (2CR)(8LF) (4N's)(12LTRS) 45« para 412c, *• delete example and substitute new example as follows: Example: 46. para 413a. (TI)(5 SPACES)UU(2CR)(LF) 00 HCP10 ZDG HCPAO . YMA145(5 SPACES) UU 00 HCPEO DE HCPEN 25 19/1245Z 0 191238Z etc --- - delete example and substitute new example as follows: Example: 47, para 414 .^<:: (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (TI)(5 SPACES)UU(2CR)(LF) 00 HCPEO ZEL HCPAO YMA152 (5 SPACES) UU ' 00 HCPEO DE HCPEN 25 19/1245Z 0 191238Z etc — (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) - delete para 414 and substitute: 414 Mjsrouted Messages a. A misrouted message is one bearing an incorrect routing instruction. b. When a station detects a misrouted message it shall affix a misroute pilot to the message and forward the message onward, over the most direct route, to the correct station. The pilot shall consist of: (1) The appropriate security warning prosign, o0o o/if RESTRICTED 000121 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information RESTRICTED 4 PAGE 17 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 (2) The appropriate precedence prosign repeated. (3) The correct routing indicator of the station to effect delivery. (4) The operating signal ZOV. (5) The routing indicator of the station preparing the pilot. Example: MPA045BMA111(5 SPACES)UU(2CR)(LF) PP HCPFW DE ARQLOP 16 23/1623Z etc (2CR)(LF) (2CR)(LF) As rerouted by HCPFW (TI)(5 SPACES)UU(2CR)(LF) PP HCPFN ZOV HCPFW MPA045BMA11K5 SPACES )UU(2CR)(LF) PP HCPFW DE ARQLOP 16 23/1623Z etc — (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) e. After a misrouted message has been rerouted, the station rerouting the message shall transmit a service message to the station of origin identifyng the particular message, pointing out the incorrect routing and indicating corrective action taken. 48. para 415 r> delete para 415 an<i substitute hew para 415 as follows: 415 Mi6sent Messages a. A missent message is one which bears a correct routing instruction'but has been transmitted to a station other than that indicated. b, When a station detects a missent message, that station shall forward the message onward to the correct station over the most direct route. A pilot is not affixed. Onward relay shall be made without alteration. 49« para 416a, « delete example and substitute new example as follows: Example: As received by HUPDL MBA162(5 SPACES)UU(2CR)(LF) PP HUPDL DE HCPJW 16 12/1605Z P 121550Z FM ASOASO TO PP ARQLOP etc - — ! . (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) ..../18 RESTRICTED 000122 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information TRICTED 4 PAGE 18 TO ANNEX A TO 0 2723-2 (DCommS) 0 2723-4 As forwarded by HUPDL (TI)(5 SPACES)UU(2CR)(LF) PP ARQLOP ZFD HUPDL MBAl62(5 SPACES)UU(2CR)(LF) PP HUPDL DE HCPJW 16 12/1605Z P 121550Z FM ASOASO TO PP ARQLOP etc — r (2CR)(LF) (2CRHLF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(LF) 50. para 417.s - delete para 417 and substitute the following: i 417 Two messages with same number a. When two different messages bearing identical channel numbers are received, both shall be released immediately if they are otherwise correct. . b. After the messages have been released, a service message shall be sent to the preceding station giving notification of the duplication and the action taken. The preceding station shall make a record of the discrepancy and check to see if it was caused by equipment malfunction. Example: (TI)(5 SPACES)UU(2CR)(LF) RR HCPFW DE HCPAO 22/1745Z ZFQ PMA025 HCPFW 25 22/1740Z AND HCPFW 24 22/1732Z (2CR)(LF) (2CR)(LF) (2CR)(8LF) (4N'S)(12LTRS) c. A notation shall be made in the receiving station's records, identifying the number under which two messages were received and also identifying the second message. 51, para 418.5 - delete para 418 and substitute the following: 418 One Message Preceded by Two Numbers . a. When a station receives a message preceded by two consecutive transmission identifications ©f the preceding station, and there is nothing else wrong with the message, it shall be recorded under the lower number and released immediately. b. The higher number shall be recorded in the receiving station's records as a "Number only" (BLANKED). c. A service message shall be sent to the preceding station advising of the discrepancy and the action taken. ../19 D 000123 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information 4 PAGE 19 TO ANNEX A TO 02723-2(DCommS) 0272304 ' Example: (TI)(5 SPACES)UU(2CR)(LF) RR HCPFW DE HCPAO 21/1635Z ZPU PMA028 PMA029 HCPFW 29 21/1628Z (2CR)(LF) (2CR)(LF) (2CR)(8LF) (4N'S)(12LTRS) d. It shall be the responsibility ©f the station receiving a service message such as that in e. to ascertain whether ©r not a transmission has lost. If a message had been transmitted under higher of the two channel numbers, it shall be transmitted under a new channel number. 52. para 419.: above been the re- - delete para 419 and substitute new para 419 as follows: 419 One Transmission Containing Channel Numbers Separated by Portions of the Message Involved a. When a station receives a message containing two or more channel numbers and the numbers are separated by a portion of the message involved, the message shall be released "subject to correction" for onward relay or delivery. The lower number, being in the proper position, shall be retained in the corrected version; the higher number(s) shall be blanked. b. If the extraneous transmission identifications are identified as those of the preceding station, the receiving station shall advise the preceding station of the discrepancy and include the destination station as an Information addressee. Example: (5 SPACES)UU(2CR)(LF) RR HCPFW HCPSO DE HCPAO 23/1840Z TO,HCPFW INFO HCPSO ZFV HCPFW 31 23/1800Z PMA111 PMA112 (2CR)(LF) (2CR)(LF) (2CR)(LF) (2CR)(2LF) (2CR)(8LF) (4N's)(12LTRS) c. If the extraneous transmission identificatisns were inserted beyond the immediately preceding station, "subject to correction" shall be taken with the station of origin and the station of destination. No action need be made to correct the number discrepancies. 53. para 420.: - delete para 420 and substitute the following: 420 Message Without A Channel Number a. A message received without a channel number shall be released for onward transmission or delivery if it is otherwise correct. • o o ,9 f <&J RESTRICTED 000124 �Document disclosed under the Access to Information Act"*— ' Document divulgue en vertu de la Loi sur faeces a {'information #m RESTRICTED PAGE 20 TO iNNEX A TO 0 2723-2(DCommS) 0 2723-4 b. A service message shall be sent to the preceding station giving notification of the discrepancy and indicating the numbered transmission which the unnumbered message followed. c. A notation shall be made in the receiving station's records identifying the unnumbered message and indicating the sequence in which it was received. Example: (TI)(5SPACES)UU(2CR)(LF) RR HCPFW DE HCPAO 24/1230Z ZFT HCPFW 26 24/1155Z FMA096 54. (2CR)(LF) (2CR)(LF) (2CR)(8LF) (4N's)(l2LTRS) para 421.: - delete para 421 and substitute the following: 421 Open Numbers a. When an open number, i.e., a sequential number for which no transmission was received, is discovered, the transmitting station shall be advised by OPERATIONAL IMMEDIATE service message. The Service message will merely report that the number is open; it will not contain a request for retransmission. After appropriate record is made, the matter shall be considered Closed insofar as the reporting station Is concerned, b. Upon receipt ©f a report of an open number, the transmitting station shall determine whether or not a transmission had been made under that number. If not, appropriate notation shall be made in station records and no further action taken; if so, the transmission shall be retransmitted under a new channel number. Example: (1) HCPAO reports an open number to HCPFW (TI)(5 SPACES)UU(2CR)(LF) 00 HCPFW DE HCPAO 24 13/H22Z ZFX PMA085 (2CR)(LF) (2CR)(LF) (2CR)(8LF) (4N's)(l2LTRS) (2) HCPFW, after ascertaining that a transmission was made under PMA085 retransmits: VZCZC PMA09K5 SPACES)UU(2CR)(LF) RR HCPSO DE HCPFW 65 13/1345Z etc — (2CR)(LF) (2CR)(LF) ! o e o 0 / 4&X RESTRICTED 000125 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information * RESTRICTED 55. PAGE 21 TO ANNEX A TO 0 2723-2(DCommS) 0 2723-4 para 422.: - Add para 422 as follews: 422 Message Without a Station Serial Number If a called station receives a message without a station serial number, that station shall obtain the omitted data, if required, by sending a service message to the originating station. RESTRICTED 000126 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information . . ANNEX B TO 0 2723-2 (DCommS) 0 2723-4 AUTOMATIC EQUIPMENT (STRAD) 1. The Telegraph Automatic Routing Equipment (STRAD) has been operational at CARP ONTARIO CANADA JUN 64,and it is felt that a report on its operations might serve as familiarization data. At the beginning of the operational period rejects were high and were due in the main to: (a) Operating. (b) Equipment. 2. Operating An important thing to remember is that what might have been acceptable in Torn Tape with human surveillance and common sense being applied is not acceptable to an automatic equipment conditioned to accept and act upon a precise function or set of functions. e.g. 1. 5 spaces HH 2 CR LF letters PP space RBDAC Acceptable in torn tape, rejected by STRAD. 2. 5 spaces UU 2CR LF PP space RBDAXARBDWC Normally accepted by the operator in Torn Tape, rejected by STRAD. In order that this may be clearly understood the following notes on the action of the Decoder in STRAD are forwarded. (Refer to Appendix 1). ACTION OF THE DECODER IN STRAD •• •1 - . 3. STRAD is conditioned to start recording by the start of message function VZCZG. After receiving this on an incoming line every single subsequent character meaningful or not is recorded until the receipt of either an end of message function or another start of message function. 4. Although every character is recorded, only a few combinations of characters are recognised by the decoder. These are as follows: Line 1 - Space UU or HH. Beginning of Line 2 - LF (from end of Line 1) precedence Prosign (MM, RR, PP, 00, YY, ZZ). Routing Line 2 - Space Routing Indicator Space Routing Indicator etc to 2CR LF Space Routing Indicator etc to 2CR LF. End of Routing Line - LF (from end of Line 2) DE Space or LF (from end of Line 2) Z and any other letter but not Z. These functions of the decoder are discussed in detail in subsequent paragraphs. 5. Routing Line 1 In the first instance the decoder looks for sp UU or sp HH. On receipt of either of these combinations it will treat the message as unclassified or classified. If neither U nor H is received it will assume that the message is classified. No matter what garble or gibberish is included in Line 1 no reject action can be taken by the decoder until after it has received instructions to start Line 2, the routing line. 000127 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information PAGE 2 TO ANNEX B TO 0 2723-2(DCommS) 0 2723-4: 6. Start of Rquting Line 2 The decoder is looking for line feed immediately followed by one of the six letters M, R, P, 0, Y or Z. If it does not receive one of these six combinations it assumes that it is still in Line 1 and routing has not started. A necessary exception to this rule is that characters used for the bell signal (figure shift, J, S and letter shift) can be interposed between the line feed and the first character of the precedence prosign. If any other letter or function other than these four is interposed then decoding of the routing line will not take place. Example 2CR LF (FIGS)JJJJJSSSSS(LTRS) ZZ is read by the decoder as 2CR LF ZZ and the routing line is deemed to have started. Whereas 2CR LF (FIGS)JJJJJSSSSS(LTRS) Space ZZ is read as 2CR LF Sp ZZ and the decoder will assume routing has not started. 1' Routing Line,2 The decoder having received start of routing will expect to see next: (a) The second letter of the precedence prosign. (b) Space. (e) All the routing indicators each separated by a space and if necessary two carriage returns line feed. (d) The end of routing combination which is either line feed DE space or line feed Z. Any other letter but not Z. In order that the decoder shall recognise the routing indicators it is essential that each one be separated by a space. Any garble in the routing line after the receipt of the start of routing combination will cause the message to be rejected to a manual position. The omission or garble of a space will also activate an audible and visual alarm. It will only recognize those routing indicators programmed into it. ANY OTHERS ARE REJECTED. 8. End of Routing Line 2 The decoder will carry on attempting to decode routing indicators until it is told to stop by the receipt of one of the two possible end of routing line combinations: (a) Line feed, DE, space (b) Line feed, Z. Any other letter but not Z. 0 0 * 0 / J5 000128 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information PAGE 3 TO ANNEX B TO 0 2723-2(DCommS) 0 2723-4; If any one of these characters is garbled or omitted or if any other function or character is Interposed then the decoder will not know that the routing line is ended and will continue to try to decode the next group of characters. Such messages are invariably rejected. Example 1 2CR LF 00 Sp RBXYZ Sp RBABC 2CR LF DE Sp RBCBA figs 01/1400 letters Z This message has the correct format. addressees. Example 2 Transmissions will go to both 2CR LF 00 Sp RBXYZ Sp RBABC 2CR LF letters DE Sp RBCBA Sp Figs 01/1400 letters Z The introduction of a letter shift after the line feed (a common fault) has caused the decoder to continue to decode into Line 3. It does not recognise letter shift DE as an acceptable routing indicator nor for that matter 01/1300Z. The message is rejected to a manual position and has to be reprocessed and fed back into the machine, 9. It will be seen from the above that a large number of traps exists for the unwary or unfortunate operator who is working into STRAD:(a) He forgets to put on a start of message function. ignore him. STRAD will coldly (b) He puts on two start of message functions. (This is a possible fault in the automatic message number sender). STRAD ceases to record after the second S.0,M. and the message itself is lost, (c) He garbles the start of routing function. . STRAD will ignore the routing line and attempt to route one of the subsequent lines. Normally this will result in the message being rejected. However if the routing line happens to be a pilot the result can be even more catastrophic. A normal message preceded by a pilot is in effect a message with two routing lines. If for any reason STRAD ignores the first routing line there is a good chance that it will take action on the second which is clearly just what the sender of the message did not want. Example HH 2CR LF Sp 00 Sp RBXYZ 2CR LF ZVA (5 spaces) HH 2CR LF 00 Sp RBABC Sp RBDEF Sp RBXPQ 2CR LF DE Sp RBCBA etc'. The STRAD decoder will ignore the pilot which has an incorrect start of routing (space before 00) and will operate happily on the next line which has correct start of routing. Since the rest of the routing line is in correct format, it is unlikely that the STRAD Controller will notice that any thing is wrong. (d) He produces a garble in routing Line 2 or in the end of routing function. STRAD rejects the whole message to a paper tape manual position. A complete new format for Lines 1, 2 and 3 has to be inserted manually on the tape which is then fed back into STRAD for onward transmission. A long unnecessary delay has been imposed upon the message and most of the advantages of an automatic relay have, been nullified. ...,/4 000129 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a /'information +• PAGE 4 TO ANNEX B TO 0 2723-2(DCommS) 0 2723-4 (e) He omits or garbles the end of message combination. This can have different effects according to whether he is working on a line circuit or a radio^channel with or scheduled to have, error detecting equipment, (i) On a line circuit. If the message is not followed within thirty seconds by another message an artificial end of message (ZXB) will be inserted by STRAD, The recipient may not Ipjow if the message is complete or not and will most likely ask for a re-run. If the message is followed by another message within thirty seconds the start of message function of the second message will activate the artificial termination of the first message with ZXB. Thus the first message will reach its destination with a ZXB ending, the second message having now lost its SOM will not be recorded by STRAD at all and is lost. Certainly one and probably both messages will eventually require to be re-run, (ii) On an E.D<,C. radio channel. STRAD is conditioned to wait indefinitely until the whole of a message is received before it begins retrnamission. No artificial termination is applied as in (e) above and the message can1be held for hours awaiting an end of. message function. Whenever the end of message function is garbled or omitted, invariably STRAD has to wait for the next start of message before the first transmission can be terminated and retransmitted. As before, the first message is given a ZXB end and the second message is not recorded, (iii) It can and sometimes does happen that the end of message function of one message is garbled, and the start of message function of the following message is also garbled. The second message then tags on to the end of the first, A misroute or a breach of security or both may result, 10, All the mistakes referred tc above have been encountered during the period that STRAD has been in operation although some are more common than others. A few-are caused by distortion on channels and some by faulty equipment. By far the greatest number are due to lack of care by the operator, and failure to comply with rules of procedure, A little more care when the message is prepared may take a few extra seconds, but will save hours, later on, when the message gets to the automatic relay equipment. 11. Special points for the operator to remember; (a) STRAD is a machine. It does not make mistakes itself but cannot correct errors made by you, (b) STRAD records everything it receives. Eventually all your mistakes are printed out for everyone to see. (c) Receipt of a second start of message function while a message is in progress and before the end of message function has been received, causes the message to be artificially terminated. At the same time STRAD is conditioned to cease recording until the receipt of another start of message function, (d) Garbles in Line 1 do not cause the message to be rejected. Only messages with mistakes in routing Line 2 or the end of routing line combination are put out at the reject position, (e) Garbles in the start of routing Line 2 in a pilot may cause STRAD to ignore the pilot and act on the routing line of the message. O O9 O/ J 000130 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur faeces a {'information PAGE 5 TO ANNEX B TO 0 2723-2(DCommS) 0 2723-/;, General (a) Probably our most serious problem is the question of open numbers. At the moment, ZFX are running high. It will be appreciated Just what this means in services to and from this station. The automatic equipment does an automatic number comparison and if disagreement occurs raises an alarm, both aural and visual and prints out the disagreement, e.g. TI Disagreement Correct SpSp WCA012 WCA013 WCA012 WCA012 It does this when a number disagrees and when the TI is formed otherwise than that laid down. e.g. WCA space 012 The main cause of open numbers in STRAD is the lost VZCZC or NNNN letters and consequent non recording of the message. The TI disagreement occurs when the next message comes in. (b) Another cause of rejects not mentioned above is where the total number of characters/functions exceed 136 down to the end of Line 3. This means that in a multi address message nine routing indicators in Line 2 may be the maximum acceptable but the yard stick is 136 characters. The maximum is often exceeded by excessive characters between the TI and 5 spaces UU/HH all of which count towards the 136. (c) Bell Signals The positioning of these within a message is causing trouble and as these are always associated with High Precedence messages it is imperative that the correct format is used. (See para 6 above). 000131 �Document disclosed under the Access to Information Act Document divulgue en vertu de |a Loi sur faeces a {'information , - V^""V - ESSENTIAL MESSAGE FORMAT VV/THOUT LlME ONE P/LOT FORMAT LINE N/UMBER U//,V. • -• — ^ - ESSEN7/AL MESSAGE FORMAT, yjiTH ONE PILOT FORMAT LINE NUMBER MESSAGE o ZTZ3 •Z(t>£c'wS) •' '-, UNE r •-•.'/"' ^ MENAGE VZCZCAeAt'^^-^^UlK^ / \/ZC2CABAfl23^^+-*VU«B 2 f?R->HCPSp->>HCPFO*HCPEQ<<^ 2 HCP$\Ah--HCpEA/<<=. - 3 DE^HCPFW^ff73^A^ti9///90l2«= 2. 4-/ PREAMBLE, A0t>R£$$3 TEXT: 3 PE->ARQLOP->f/6+lB/'6231,Z«Z 9 (2CR)(ZLmNNN(llUTR$ 4-^ PREAMBLE, ADDXESSiTEXT* f (2CK\tlLF)NNNN0ZLTRS).::'- RR->HCPFM«E ...•'. : • •. ^ '- /'.'..'• Z0V+HCpFW<<2±:. -,.,§ RR->HCPFW«EL LEGEND 1 - i(Fi6's) HLWS) -* (SPACI=)<(CARR/AGE RETURN) f (LW£ FEED) tNDKATQRS AS REQUIRED EACH -~(A00)TIONAL •• : : • ' - -" .• : —. SPACEfrgy-*) : : : 000132 � Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Hydra Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context HY00262 Title A name given to the resource Communication Instructions Hydra Service Procedures (HSP 101) Date A point or period of time associated with an event in the lifecycle of the resource 06/29/1965 Source A related resource from which the described resource is derived Fixed Communications - Hydra Telegraph Relay System - Relocation of Hydra - Plans and Policy, RG24, S-2723-2, Vol. 1, Library and Archives Canada (LAC) Creator An entity primarily responsible for making the resource Department of National Defence Rights Information about rights held in and over the resource Canadian Crown Subject The topic of the resource STRAD, ACP 127, standards, procedures Description An account of the resource Memorandum from W.R. Smith, Captain, Chairman, Hydra Procedure Working Group to D Comm P2, cc: HQ CFCS, 701 Comm Sqn, Ottawa Wireless Station pertaining to proposed changes to HSP 101 (Hydra Service Procedures) in order to pass traffic through STRAD. Changes initiated due to changes with ACP 127 - NATO tape relay message standard. Publisher An entity responsible for making the resource available Canada Declassified Type The nature or genre of the resource Text Format The file format, physical medium, or dimensions of the resource PDF Language A language of the resource en