2870 Dis;ress traffic. INTERNATIONAL RADIO CO~VEXTION. NOVEMBER 25,1927. §9. (1) Stations which receive a distress message from a mobile station which unquestionably is in their immediate vicinity, must at once acknowledge receipt thereof (see sections 15 and 16 below), taking care not to interfere with the transmission of the acknowledg- ments of receipt of the said message sent by other stations. (2) Stations which receive a distress message from a mobile station which unquestionably is not in their immediate vicinity, must listen for a short period before acknowledging receipt thereof in order to permit the stations nearer to the mobile station in distress to answer and acknowledge receipt without interference. Distress traffic §10. Distress traffic shall include all messages relative to immediate relief of the mobile station in distress. §11. All distress traffic must include the distress signal, sent before the time of filing. §12. The control of distress communications devolves upon the mobile station in distress or upon the mobile station which, by application of the ~r{)visions of section 8, su bparagraph (a), sent the distress call. These stations may delegate the control of the distress communications to another station. §13. All stations which are within the range of the distress com- munications but which do not take part in them must refrain from using the distress wave until the distress communications are finished. As soon as these communications are established on the distress wave. mobile stations not taking part in them may continue their normai service on other authorized waves of Type AI, if by so doing they are still able effectively to receive the distress traffic. §14. (1) When distress communications are ended and silence is no longer necessary, the station which has controlled these communica- tions shall send a message on the distress Wave addressed to CQ, indicating that the distress communications are ended. This message shall take the following form: Call CQ (three times), word DE, call signal of the station transmit- ting the message, distress signal, time of filing the message, name and call signal of tho l1l0bile station which was in distress, words" distress traffic ended." (2) This message shall be repeated, where necessary, on the other waves on which the distress traffic has been sent. re~~k~r:'li~?~gm~: Ac7c1WWZedgment oj receipt oj a distress message-Repetition oj a distres8 sage. coIl or me88age §15. Acknowledgment of receipt of a distress mes.sage shall be made in the following form: Call signal of the mobile station in distress (three times), word DE, call signal of the station acknowledging receipt (three times), group RRR, distress signal. §16. Every mobile station which acknowledges receipt of a dis- tress message must make its name and position known as soon as possible (in the form shown in Paragraph 4), taking care not to inter- fere with other stations more favorably situated to render immediate relief to the station in distress. §17. If a mobile station employing continuous waves not ipcluded in the band 485 to 515 kc/s (620-580 m.) hears a distress message sent on the wave of 500 kc/s (600 m.), during other than the obliglitory silence periods on the wave of 500 kc/s (600 m.), and if the ship, aircraft or other mobile station is not in a position to render assist- ance, the said station must take all possible steps to attract the
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