Page:United States Statutes at Large Volume 49 Part 2.djvu/457

 TELECOMMUNICATION CONVENTION. DECEMBER 9, 1932. peN] § 13. In principle, the stations shall use the same frequencies and the same types of emission for the transmission of messages by the unilateral method as for their normal service. Regional arrange- ments may, however, be made for the purpose of exempting the sta- tions concerned from complying with this rule. 2473 [ 105] § 14. A fL'{ed station may as secondary service on its normal "'fobile statj(?~ trans-, , ml,SlOns; conditions. working frequency, make transmissions intended for mobile stations on the following conditions: P06] (a) that the administrations concerned deem it nec- essary to use this exceptional working method; P07] (b) that no increase in interference results therefrom. [ lOS] § 15 In order to facilitate the exchange of synoptic meteoro- Excbangin.!! :;ynoptie • meteorologiC::! lIles- logical messages in the European regions, the frequencies of 41.6 sages. kc and 89.5 kc (7,210 m and 3,352 m) shall be allocated to this service. [109] § 16. To facilitate rapid transmission and distribution of infor- et~:rilIlin:l) detection. mation of value in the detection of crime and pursuit of criminals, a frequency between 37.5 and 100 kc (between 8,000 and 3,000 m) shall be reserved for this purpose by regional arrangements. [110] § 17. Each administration may allocate to amateur stations Mnaleur stations. frequency bands in accordance with the allocation table (§ 7 above). [lll] § 18. In order to decrease interference in the frequency bands Si(l~.errerelwe pwyi- above 4,000 kc (wavelengths below 75 m), used by the mobile service, nnd particularly in order to avoid interfering ",it11 the long-distanco telephone communications of this service, the administrations agree to adopt the following rules, wherever possible, taking into account current engineering development: [112] (1) (a) In the frequency bands above 5,500 kc (wave- m~:Ii~:) ;(\ti~:,l.'.", cnll'- lengths below 54.55 m) allocated exclusively to the mobile service, the frequencies (wavelengths) which must be used by ship stations carrying on commercial service shall be on the low-frequency (long- wave) side of the band, and especially in the limits of the harmonic bands enumerated below: 5,500 to 5,550 kc (54.55 to 54.05 m) 6,170 to 6,250 kc (48.62 to 48.00 m) 8,230 to 8,330 kc (36.45 to 36.01 m) 11,000 to 11,100 kc (27.27 to 27.03 m) 12,340 to 12,500 kc (24.31 to 24.00 m) 16,460 to 16,660 kc (18.23 to 18.01 m) 22,000 to 22,200 kc (13.64 to 13.51 m) [113] NOTE. - The frequency bands 4,115 to 4,165 kc (72.90 to 72.03 m) may also be used by the stations mentioned above [see also (2) (c) below]. [114] (b) However, any commercial ship station the emis- FI 'ip to wast. sions of which comply with the frequency tolerances required of land stations under § 2 (2) of article 6, may transmit on the same frequency Ante. p. 24 .5 .3 . as the coast station with which it communicates.