f6{ STAT.1 MULTILATERAL-TELECOMMUNICATIONS-OCT. 2 . 1947 (Chapter XIII, art. 35 RR) (840-848) 840 b) exchanging all traffic originating in or destined for mobile stations which are situated within their range and have indicated their presence before the actual cessation of work. Section III. Aeronautical Stations 841 §5. The service of an aeronautical station shall be con- tinuous throughout the period during which it bears primary responsibility for the radiocommunication service to aircraft in flight. Section IV. Ship Stations 842 § 6. (1) For the international service of public correspon- dence, ship radiotelegraph stations are divided into three categories: 843 - Stations of the first category: these stations main- tain a continuous service. 844 - Stations of the second category: these stations maintain a service of limited duration as indi- cated in 847 and 848. 845 - Stations of the third category: these stations maintain a service the duration of which is either shorter than that of stations of the second cate- gory, or is not fixed by these Regulations. 846 (2) Each government shall itself determine the rules under which ship radiotelegraph stations subject to it are to be placed in one or the other of the above three categories. 847 § 7. (1) Ship stations of the second category must provide service at least during the hours fixed by appendix 13. These hours are mentioned in the license. 848 (2) In case of short voyages, they provide service dur- ing the hours fixed by the administration to which they are subject. 1891
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