Page:United States Statutes at Large Volume 63 Part 2.djvu/620

 (,W STAT. I MUILTILA'ITEI1AL- -TELE('Oi)\IIM NIC(ATINS-CT. 2. 1947 (Chapter XIV, art. 37 RR) (924-930) 924 § 31. The automatic devices intended for the reception of the alarm signal must fulfil the following conditions: 925 a) they must respond to the alarm signal trans- mitted by the telegraphic emissions of at least class A2 or B; 926 b) they must respond to the alarm signal through interference (provided it is not continuous) caused by atmospherics and powerful signals other than the alarm signal; preferably without any manual adjustment being required during any period of watch maintained by the appa- ratus; 927 c) they must not be actuated by atmospherics or by strong signals other than the alarm signal; 928 d) they must possess a minimum sensitivity such that with negligible atmospheric interference, they are capable of being operated by the alarm signal transmitted by the emergency (reserve) transmitter of a ship station at any distance from this station up to the normal range fixed for this transmitter by the Convention for the Safety of Life at Sea, and preferably at greater 50 tat. 1121 distances; 929 e) they must give warning of any fault which would prevent the apparatus from performing its normal functions during watch hours. 930 § 32. Before an automatic alarm receiver may be ap- proved for use on ships, the administration having jurisdic- tion over those ships must be satisfied by practical tests made under operating conditions equivalent to those obtaining in practice (including interference, vibration, etc.), that the apparatus complies with the provisions of these Regulations.

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