1521 54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 probable time at which the work can begin, as well as the frequency and the type of wave which will be used in the work with it, if this is necessary. [458] §4. When a land station receives calls from several mobile stations at practically the same time, it shall decide as to the order in which these stations may transmit their traffic to it, its decision being based only on the necessity for permitting each calling station to exchange with it the greatest possible number of radiotelegrams. [459] §5. (1) When communication is first established with a land station, every mobile station, if it deems it advisable on account of possible confusion, can transmit its name spelled out as it appears in the nomenclature. If the mobile station does not yet appear in the nomenclature, it may transmit its name fully spelled out. [460] (2) The land station can, by means of the abbreviation PTR, request the mobile station to give it the following information: [461] (a) approximate distance in nautical miles and bearing with reference to the land station, or else the position indicated by latitude and longitude; [462] (b) next place of call. [463] (3) The information covered by paragraph (2) [No. 460] shall be furnished by authorization of the commander or the person respon- sible for the vehicle carrying the mobile station and only in case it is requested by the land station. [464] §6. In communications between land stations and mobile sta- tions, the mobile station shall comply with the instructions given by the land station, in all questions relative to the order and the time of transmission, to the choice of frequency (wavelength) and/or of the type of wave, and to the suspension of work. This provision shall not apply to cases of distress. [465] §7. In communications between mobile stations, and except for cases of distress, the station called shall control the work as indi- cated in §6 above [No. 464]. [466] §8. (1) When a station called does not answer a call sent three times, at intervals of 2 minutes, the call must cease and it may be resumed only 15 minutes later. [467] In the case of communications between a station of the mari- time mobile service and an aircraft station, the call may be resumed 5 minutes later. [468] The calling station, before resuming the call, must make cer- tain that the station called is not in communication with another station at that time. [469] (2) The call may be repeated at shorter intervals if there is no danger that it will interfere with communications in progress. [470] §9. When the name and the address of the operating agency of a mobile station are not shown in the nomenclature or are no longer in accord with the data given therein, it shall devolve upon the mobile station, as a matter of routine, to furnish the land station to which it
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