Page:United States Statutes at Large Volume 45 Part 2.djvu/1179

 INTERNATIONAL RADIO CONVENTION. NOVEMBER 25, 1927. 2855 (b) Theoretical and practical knowledge of the operation of the accefbsory apparatus, such as motor-generator sets, storage batteries, etc., used in the operation and adjustment of the apparatus specified in subparagraph (a). (c) Practical knowledge necessary to make, with the means on board, the repairs of damage which may have occurred to the ap- paratus during a voyage. (d) Correct transmission and correct reception by ear of code groups (mixed letters, figures, and punctuation marks) at a speed of 20 (twenty) groups per minute, and of text in native plain language, at a speed of- 25 (twenty-five) words per minute. Each code group must be composed of five characters, each figure or punctuation mark counting as two characters. The average word of the text in native plain language should contain five characters. . (e) Detailed knowledge of the regulations applying to the ex- change of radio communications, knowledge of documents relative to charges for radiotelegrams, knowledge of the radio-telegraph part of the Regulations for the Safety of Life at Sea, and, in the case of aerial navigation, knowledge of the special provisions regulating the aerial navigation radio service. (j) Knowledge of the general geography of the five parts of the world, and particularly the principal wire and radio connections. B. Second class Second clalS. The second-class certificate shall state the professional qualifica- tions of the operator with regard to: (a) Elementary theoretical and practical knowledge of electricity and radiotelegraphy, as well as knowledge of the adjustment and operation of apparatus used in the mobile service. (b) Elementary theoretical and practical knowledge of the opera- tion of accessory apparatus, such as motor-generator sets, .storage batteries, etc., used in the operation and adjustment of the apparatus mentioned in subparagraph (a). (c) Practical knowledge sufficient for making smaJ..l repairs in case of damage to the apparatus. (d) Correct transmission and correct reception by ear of code groups (mixed letters, figures, and punctuation marks) at a speed of 16 (sixteen) groups per minute and of text in native plain language at a speed of 20 (twenty) words per minute. Each code group must be composed of five characters, each figure or punctuation mark counting as two characters. The average word of the text in native plain language should contain five characters. (e) Knowledge of the regulations applying to the exchange of radio communications, knowledge of documents regarding charges for radiotelegrams, knowledge of the radiotelegraph part of the Regula- tions for the Safety of Life at Sea, and, in the case of aerial naviga- tion, knowledge of the special provisions regulating the aerial navi- gation radio service. (j) Elementary knowledge of general geography applying to com- munications by w4"e and radio. C. Special certificate Special certificate. (1) The radiotelegraph service of small vessels (to which the Con- vention for the Safety of Life at Sea is not applicable) may be carried on by operators holding a special certificate satisfying the following req uirements: (a) The operators of such of these mobile stations as engage in the international service of pUblic correspondence and in the general work of mobile stations must be capable of carrying on radio commu-

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