Chapter XIII.
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Chap. XIII, art. 34 RR) (827–833) 2 182 kc/s twice each hour for three minutes commencing at x h 00 and x h 30, Greenwich mean time. (G.M.T.). 827
(4)During the above-mentioned intervals, all transmissions in the bands between 2 167 and 2 197 kc/s, except distress, urgency and safety transmissions, must cease. Section III. Frequency Bands between 4 000 kc/s and 23 000 kc/s 828 § 13.
(1)The provisions of this section are applicable to the radiotelephone service between coast stations and ship stations in the frequency bands allocated for this purpose to the maritime mobile service between 4 000 and 23 000 kc/s. 829
(2)In duplex telephony, the frequencies of emission of coast stations and of the corresponding ship stations shall be selected, as far as possible, by pairs as indicated in appendix 12. Section IV. Frequency Band 152–162 Mc/s 830 § 14.
(1)The frequency 156.80 Mc/s is the frequency designated for world-wide use on a simplex basis in the maritime mobile service for calling, safety, intership and harbour control purposes. 831
(2)The administrations concerned will take the necessary steps, by special arrangements if necessary, to reserve a suitable guard-band for this frequency. 832
(3)The frequency 156.80 Mc/s must not be used for purposes other than those defined in 830 in areas where such other use is liable to cause harmful interference to the maritime mobile service. 833 § 15. The use of frequency modulation is compulsory in Region 2 and its use is strongly recommended in other regions. 63 Stat. 1888 (834–839) (
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