Page:United States Statutes at Large Volume 63 Part 2.djvu/660

 It8 STAT. I IMULTILAT'ERAL-TELECOMMUIiNICATIONS-OCT. 2. 1947 (Chapter XVI, art. 45 RR) (1048-1063) meteorology and the aeronautical meteorological service, in conformity with regional agreements made by the services concerned for the use of these frequencies. 1048 § 4. (1) Meteorological messages intended specially for all ship stations are sent, in principle, in conformity with a fixed time table, and, as far as practicable, at times when they can be received by ship stations having only one operator. The speed of transmission is chosen so that an operator possessing only a second class certificate may be able to read the signals. 1049 (2) During the transmission "to all stations" of meteor- ological messages intended for stations of the maritime mobile service, all stations of this service whose transmissions might interfere with the reception of these messages, must keep silent in order to permit all stations which desire to do so, to receive these messages. 1050 (3) Meteorological warning messages for the maritime mobile service are transmitted without delay. They must be repeated at the end of the first silence period which follows (see 733) as well as at the end of the first silence period which occurs in the working hours of a ship station haying a single operator. They are preceded by the safety signal and are sent on the frequencies laid down by 946. 1051 (4) In addition to the regular information services con- templated in the preceding sub-paragraphs, administrations take the necessary steps to ensure that certain stations shall, upon request, communicate meteorological messages to sta- tions in the maritime mobile services. 1052 (5) The provisions of 1048 to 1051 are applicable to the aeronautical mobile service, insofar as they are not con- trary to more detailed special arrangements ensuring at least equal protection to air navigation. 1053 § 5. (1) Messages originating in mobile stations and contain- ing information concerning the presence of tropical cyclones must be transmitted, with the least possible delay, to other 1957

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