Page:United States Statutes at Large Volume 54 Part 2.djvu/251

 54 STAT.] MULTILATERAL-TELECOMMUNICATION-APR. 8, 1938 adopt the following rules, wherever possible, taking into account cur- rent engineering development: [181] (1) (a) In the frequency bands above 5,500 kc (wavelengths ghi tions carry- below 54.55 m) allocated exclusively to the mobile service. 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 within the limits of the harmonic bands enumerated below: 5,500 to 5,550 kc (54.55 to 54.05 m) 6,200 to 6,250 kc (48.39 to 48 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 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) [182] Note. - The frequency bands of 4,115 to 4,165 kc (72.90 to 72.03 m) may also be used by the above-mentioned stations [see also (2) (c) below.] [No. 188] [183] (b) However, any commercial ship station the emissions of which comply with the frequency tolerances required of land stations under §2 (1) of article 6 [No. 71], may Ante, p. 142. transmit on the same frequency as the coast station with which it communicates. [184] (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 frequencies 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) [185] Note. - The administrations agree, in reporting the frequency of a coast station, to indicate on which one of the waves specified in No. 184 listening will be carried on. [186] (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 fre- quency tolerances specified for land stations in §2 (1) of article 6 [No. 71]. 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 the 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 ke (17.05 to 16.90 m) 22,900 to 23,000 ke (13.10 to 13.04 m) 1471

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