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87.—(1) In addition to the emergency lighting required by Part VII, all passenger spaces, public spaces and alleyways shall be provided with supplementary electric lighting that can operate independently of the main and emergency and transitional sources of electric power for at least three hours when the ship is listed up to 90 degrees. The illumination provided shall be such that the approach to the means of escape from the space can be seen. The source of electric power for the lighting shall be accumulator batteries located within the lighting unit that are continuously charged, where practicable, from the emergency switchboard whilst the ship is in service. The lighting shall be of the maintained type so that any failure of the lamp will be immediately apparent. The accumulator batteries shall be replaced in accordance with the service life established by the manufacturer having regard to the ambient temperature to which they are subject in service.
(2) A portable rechargeable battery operated hand lamp shall be provided in every crew space, alleyway, recreational space and every working space which is normally occupied unless supplementary emergency lighting as required by paragraph (1) is provided.
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