# The Merchant Shipping (Radio Installations) Regulations 1992, Paragraph 3


Monthly
(a) Motor life-boat fixed radiotelegraph installations and portable radio equipment for survival craft shall be tested at least once a month using an antenna provided with the installations or equipment. In the case of motor life-boat fixed radiotelegraph installations, the test shall, where practicable, be carried out with the life-boat floating in the sea.
(b) Batteries providing a source of energy for any part of the radio installation shall be tested at least once a month by means of a hydrometer where practicable, or where a hydrometer cannot be used, by a suitable load test. A check shall also be made of the security of the battery and its connections and the condition of the battery and its compartment.

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Source: https://www.legislation.gov.uk/uksi/1992/3/schedule/4/paragraph/3 (the official version)
Page: https://openlegislation.uk/merchant-shipping-radio-installations-regulations-1992/schedule-4/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.