(i6 STAT.I IU'LTILATERAL-TELECOM)aIUNICATIONS-OCT. 2, 1947 (Chapter XIV. art. :{7 RR) (890-896) 890 (4) When the mobile station in distress receives no answer to a distress message sent on a distress frequency, the message may be repeated on any other available frequency on which attention might be attracted. 891 § 17. Immediately before a crash landing, a forced land- ing (on land or sea) of an aircraft, as well as before total abandonment of a ship or an aircraft, the radio apparatus must, if circumstances permit, be set for continuous emission. 892 § 18. A mobile station which learns that another mobile station is in distress may transmit the distress message in either of the following cases: 893 a) the station in distress is not itself in a position to transmit it; 894 b) the master or person responsible for the ship, aircraft or other vehicle carrying the station which intervenes, believes that further help is necessary. 895 § 19. (1) Stations of the mobile service which receive a dis- tress message from a mobile station which is, beyond any pos- sible doubt, in their vicinity, must immediately acknowledge receipt (see 913, 914 and 915). If the distress call has not been preceded by the alarm signal, these stations may transmit this alarm signal with the permission of the authority responsible for the station (for mobile stations see 565), taking care not to interfere with the transmission of acknowledgments of receipt sent by other stations. 896 (2) Stations of the mobile service which receive a dis- tress message from a mobile station which, beyond any pos- sible doubt, is not in their vicinity, must allow a short interval of time before acknowledging receipt of the message, in order to permit stations nearer to the mobile station in distress to answer and acknowledge receipt without interference. 1907
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