Page:United States Statutes at Large Volume 45 Part 2.djvu/1200

 2876 INTERNATIONAL RADIO CONVENTION. NOVEMBER 25,1927. ARTICLE 26 ~,:.ting of radioteJe- Routing oj radiotelegrams Distress waves. Reducing Interfer- ence. §1. (1) In principle, a mobile station using waves of Type A2, A3 or B shall send its radio telegrams to the nearest land station. (2) When, however, the mobile stationll1ay choose among several land stations, situated at approximately the same distance it shall give the preference to that located on the ter';'tory of the country of destination, or of the normal transit of the radio telegrams to be sent. When tpe station chosen is not the nearest, the mobile station must cease work or change the type or frequency of the emission upon the first request made by the land station in the interested service which is actua.lly the nearest, the request being basen upon the interference which the work in question causes the latter. §2. A mobile statIOn using Type Al waves included in the author- ized band may transmit its radIO telegrams to a land station which is not the netU'est. It is, however, recommended in this case that prtf- erence be given to the land station established on the territory of the c(>u .• try of destination or of the country- which it appears could most reasonably effect the transit of the radlOtelegrams to be sent. §3. (1) .A coast station, to which one or more waves included in the i.land 125-150 kc/s (2400-2000 m.) are allocated, shall have the right of preference on such wave or waves. (2) Any other station in the mobile service transmitting public trafiic on such wave or waves and thereby causing interference to the said coast station must suspend its work at the request of the latter. §4. Except in the case of distress, communicatIOns between ship stations must not interfere with the work of coast stations. When this work is thus interfered with, the ~hip stations causing it must stop sending or change waves, upon the first request of the coast station with which they interfere. §5. If the sender of a radiotelegram filed in a mobile station has designated the land station to which he desires his radio telegram sent, the mobile station must in order to effect this transmission to the del; ignat.ed land station, wait if necessary until the conditions specified" the precedi.ng paragraphs shall have been fulfilled. §6. (1) A mobile station which does not have fued workin~ hours must inform the land station with which it is in communicatIOn the time of closing and the time of reopening its service. (2) Every mobile station whose service is about to close by reason of arriv3.1 in port must notify the nearest land station. ARTICLE 27 Wave to be used in case oj distress In case of distress, the wave of 500 kc/s (600 m.) must be used preferably with Type A2 or B. When it is not possible to use one of these types of waves, Type Al or A3 may be used. Noprovision of the present Regulations shall prevent the use by a mobile station in distress of any means at its disposal to attract attention, indicate its position, and obtain llSsistance. ARTICLE 28 Measure Jor reducing interference §1. In the case where waves other than the normal wave may be used, the ship station shall follow the instructions of the coast sta- tion with which it is in communication. In principle, the normal

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