Page:United States Statutes at Large Volume 49 Part 2.djvu/459

 TELECOMMUSICATION CONVENTION. DECEMBER 9, 1932. 2475 (116] (c) When a communication for which no special arrangement has been made must be established between a ship station, on one hand, and another ship station or a coast station, on the other hand, the mobile station shall use one of the following fre- quencies situated approximately in the middle of the bands: 4,140 kc (72.46 m) 5,520 kc (54.35 m) 6,210 kc (48.31 m) 8,280 kc (36.23 m) 11,040 kc (27.17 m) 12,420 kc (24.15 m) 16,560 kc (18.12 m) 22,080 kc (13.59 m) [116] N oTE.- The administrations agree, in reporting the frequency of a coast station, to indicate on which one of the waves specified in subparagraph (1) (c) listening will be carried on. [117] (2) (a) Ship stations carrying on commercial service shall use the shared bands above 4,000 kc (wavelengths below 75 m) only when their emissions comply with the frequency tolerances specified for land stations in § 2 (2) of article 6. In this case, the frequencies used must be chosen on the higher-frequency (shorter- wave) side of the shared band and, more especially, in the limits of t.he harmonic bands enumerated below: 4,400 to 4,450 kc (68.18 to 67.42 m) 8,800 to 8,900 kc (34.09 to 33.71 m) 13,200 to 13,350 kc (22.73 to 22.47 m) 17,600 to 17,750 kc (17.05 to 16.90 m) 22,900 to 23,000 kc (13.10 to 13.04 m) (118] (b) Frequencies chosen in the portion of the band reserved to mobile services from 6,600 to 6,675 kc (45.45 to 44.94 m), in harmonic relation with the preceding bands, may also be used. P19] (c) The provisions of subparagraph (2) (a) shall not apply to the portion of the shared band between 4,115 and 4,165 kc (72.90 and 72.03 m) which may be used by any ship station carrying on a commercial service. [,20] (3) In selecting frequencies for new fixed and coast sta- SeJl'Cting ~requencte.o. for nf'W statIOns. tions, the administrations shall avoid using the frequencies in the bands specified in subparagraphs (1) (a), (2) (a), (2) (b), and (2) (c). (121] § 19. (1) It is recognized that the frequencies between 6 000 l.~g-1istllnce eom· , DIIIDlcatIODIi. and 30,000 kc (50 and 10 m) are very efficient for long-distance communications. [1221 (2) The administrations shall make the greatest possible effort to reserve the frequencies of this band for this purpose, except when their use for short- or medium-distance communication is not likely to interfere with long-distance communications. l0401ll0-:W' - - I'T 11-2 ,.,