Page:United States Statutes at Large Volume 63 Part 2.djvu/656

 t(i STAT. I IMULTILATERAL -TELECOIMMUNICATIONS-OCT. 2, 1947 (Chap. XVI, art. 44 RR) (1026-1033) cially for locating stations sending signals of distress, alarm and urgency. 1026 § 9. The procedure to be followed by radio direction- finding stations is given in appendix 15. 1027 § 10. In the absence of prior arrangements, an aircraft station which calls a radio direction-finding station for a bear- ing must use for this purpose a frequency on which the station called normally keeps watch. 1028 § 11. In the exclusively aeronautical radionavigation ser- vice, the procedure contemplated for radio direction-finding in this section is applicable, except where special procedures are in force as a result of agreements made between the ad- ministrations concerned. Section IL Service of Radiobeacon Stations 1029 § 12. When an administration thinks it desirable in the interests of navigation to organize a service of radiobeacon stations, it may use for this purpose: 1030 a) radiobeacons properly so called, established on land or on ships permanently moored or, excep- tionally, on ships navigating in a restricted area, the limits of which are known and published. The emissions of these radiobeacons may have either directional or non-directional patterns; 1031 b) fixed stations, coast stations or aeronautical sta- tions designated to act as radiobeacons, at the request of mobile stations. 1032 § 13. (1) Radiobeacons properly so called use the frequency bands which are available to them under chapter III. 1033 (2) Other stations notified as radiobeacons use for this purpose their normal working frequency and their normal clam of emission. 1953

�