(3) When a considerable time has elapsed between the transmission of a signal and the executive sign for that signal. 401. It should be noted, by adding suitable procedure signs, the commander-in-chief can insure any dersired degree of security for the reception of his signal before giving the “execute." Thus: (1) By using the procedure sign "Y" all ships will answer and acknowledge but none will repeat back. (2) By using the procedure sign "G" all ships will repeat back but none will acknowledge. (3) By using the procedure sign "G" and "Y" all ships will repeat back and acknowledge. 402. The "executive" sign can not be annulled after it has once been made. Single Letter Procedure Signs. 403. Single-letter procedure signs are not to be confused with single-letter "signals." When used as signals the letter will follow the signal sign. When used as procedure signs they precede the signal sign. "B." 404. The letter "B" alone as a dispatch signifies "Has dispatch been received?" The letter "B" is not used in the heading as a procedure sign. 405. When making a long dispatch, it may be desirable to send it in portions. In order to insure that each portion has been received before proceeding with the next, the letter "B" is made at the end of each portion. In sending code dispatches in portions, the "B" is to be followed immediately by figures denoting the total number of groups thus far sent. 406. After the conclusion of each portion, if the receiving ship has received the portion transmitted, she makes "K" (go on) and the transmitting ship proceeds with the dispatch. Example (a). B 34 has a 90-word plain-language dispatch to send to B 25. B 25 B 25 makes: B 34 II GR 90 II First thirty words of text II B. K (go on), or IMI etc., as required. 407. As soon as B 25 has made "K," indicating that the first portion has been received, B 34 proceeds with the subsequent portions of the dispatch in a similar manner. The last portion, however, is finished in the usual manner, thus: II last portion of dispatch 1400 AR. B 25 makes: R. 408. When the transmitting ship has more than one dispatch to transmit to the same receiving ship, the letter "B" (preceded by the "break" sign II) is used after the completion of each dispatch. signifying "There is more to follow." The letter "B" is not used upon the completion of the last dispatch, and its omission signifies to the receiving ship that there are no further dispatches to follow at that particular time. Example. B 34 has two dispatches for B 25. B 34 makes the first dispatch as follows: B 25 B 34 II GR 8 II make preparations for sail ing at daylight to-morrow 1825 AR II B. B 25 answers: RIIK. B 34 then proceeds with the second dispatch for B 25 as follows: Un to Captain Smith from Jones II best wishes for a pleasant Voyage AR. B 25 answers: R. 409. The letter "B" followed by a four-figure numeral group (time of origin) or by two four-figure groups separated by "break" (office reference number and date groups and time of origin) signifies: "Has dispatch reference number been received?" Example (a). B 34 wishing to ascertain whether B25 has received dispatch timed 1400, makes: If B 25 is not able to give the required information at once, B 25 answers: R, followed later by: R 1400 or N 1400, according as she has or has not received the dispatch timed 1400 from B 34. "C." 410. The letter "C" used as a dispatch in itself signifies: "You are correct." Example (a). B 25 having repeated back correctly a dispatch from B34 which was prefaced Repeat back" (G), B 34 makes: C. Example (b). B125 in receiving a code dispatch from B 34 is doubtful of the second group, which has been read as "ABKQ." B 25 makes: INT 2 II ABKQ AR. If ABKQ is correct B 34 makes: C. 411. The letter "C," followed by a dispatch or by groups from a dispatch, signifies: "Following is correct version of dispatch timed It may be used in this connection by a ship which discovers an error in the coding or transmission of an outgoing dispatch already transmitted (although the receiving ship has not yet requested a check). In giving the correct version of dispatches or groups in dispatches they are to be made once only, even though the original dispatch may have been sent twice, as in code dispatches. Example (a). B 34, having transmitted a dispatch timed 1015 to B 25, finds that the 12th group was incorrectly coded or transmitted. B 34 corrects the dispatch by making the correct group as follows: С П 12 ЦАBKQ. II 1015 AR. B 25 makes: R. Example (b). B 34 has sent the following to B 25, which B 25 has answered: B 25 B 34 II GR 5 BT APQR II DENS II KHQT II QYPU II 2045 II IMI II GR 5 BT APQR II, etc., II 2045 AR. B 25 subsequently asks B 34 to check the coding from the decode and repeat (1) the whole dispatch; (2) the second and fourth groups. (See art. 417.) (1) B 34 checks the coding of the dispatch and finds that it is correct. B 34 repeats the correct version to B 25, repeating the dispatch only once, thus: B 25 (2) B 34 checks the coding and finds that "DENS" is correct for the second group, but that the fourth group should be “QYBU." B 34 makes the correct version thus: B 25 B 34 II C II 2 II DENS II 4 II QYBU II 2045 AR. 412. The letter "C" is always to be used in reply to the letter "J" (check the coding from the decode and repeat) whether or not the dispatch or group concerned was, in the first instance, correctly coded or transmitted, thus indicating to the receiving ship that the dispatch has been checked. 413. The letter "C" is not used in the heading as a procedure sign. "G." 414. The letter "G" used alone as a dispatch or in the prefix signifies "Repeat back." The complete dispatch is to be transmitted before the receiving ship commences to repeat back, the transmitting ship signifying the end of the dispatch with the "finale" sign AR. When repeating back or correcting repetitions the text or groups concerned are to be made once only, even though the original dispatch may have been made twice, as in code dispatches. Example (a). B 34 has a code dispatch KUBO ABYZ 1040 for B 25 and wishes it repeated back. B 34 makes: B 25 B 34 II GII GR 3 BT KUBO II ABYZ II 1040 П IMI II GII GR 3 BT KUBO II ABYZ II 1040 AR. B 25 repeats back the dispatch as follows: GR 3 BT KUBO II ABYZ II 1040 AR, B 34 makes: C. 415. The letter "G" followed by a four-figure numeral group (time of origin) or by two four-figure groups separated by "break" ("office reference number and date group" and "time of origin") signifies Repeat back dispatch timed Example (a). B 34 sends to B 25 a dispatch timed 1040 and subsequently wishes B 25 to repeat it back. if not in a position to immediatley repeat back B 34's 1040. B 25 subsequently repeats back as follows: B 34 B 25 II B 25 V B 34 II, etc., 1040 AR. If, however, B 25 is able to repeat it back immediately, she does not make "R" but repeats back the dispatch. 416. Should a part of a dispatch be repeated back incorrectly by the receiving ship, the transmitting ship should repeat that part of the dispatch again, commencing, however, a few words (or groups) before, and ending a few words (or groups) after the incorrectly repeated portion. |