Natural lighting,
Electrical fittings, arud- cial and gmergency lighting.
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(5) In any space so fitted with mechanical ventilation- (a) the vitiated air shall exhaust direct to the open air; andı (b) in the case of any such space situated abreast the machinery or boiler casings or immediately above the machinery spaces, the delivery of fresh air required to be provided pursuant to paragraph (4) shall be increased. in each such case, by 33 per centum.
24. (1) In every ship to which these regulations apply, every space allocated for the accommodation of berthed or unberthed passengers shall be properly lighted by natural light.
(2) The natural lighting of any berthed or unberthed passenger cabin, dining or recreation room, sanitary accommoda- don, galley, hospital, entrance or exit lobby shall be deemed to be proper for the purposes of this regulation if it is sufficient to enable an ordinary newspaper to be read by a person of normal vision at any point in the space, being a point available for free move- ment, during day-time and in clear weather,
(3) The natural lighting of any unberthed passenger accom- modation in between decks, bridge spaces and superstructures shall be deemed to be proper for the purposes of this regulation if the provisions made for the direct admission of natural light amounts to at least 1 square inch for every 24 square feet of the gross passenger area.
(4) For the purposes of paragraph (3), natural lighting shall, as far as possible, be evenly distributed; and, in any space where longitudinal bulkheads such as machinery casings exclude natural light, the measure of illumination required in the way thereof shall be determined proportionately.
(5) Any side scuttle fitted below the bulkhead deck shall be at least 10 inches in diameter and shall be fitted in accordance with the provisions of the Merchant Shipping (Passenger Ship Construction) Rules from time to time in operation in Hong Kong.
25. (1) In every ship to which these regulations apply other than-
(a) any ship engaged exclusively in the river trade area; and (b) any ship of less than 1,000 tons gross engaged in the
eastern trade area,
all electrical equipment and installation, including the emergency source of electric power, shall be fitted in accordance with the provisions of the Merchant Shipping (Passenger Ship Construction) Rules from time to time in operation in Hong Kong.
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(2) The exit from every main compartment occupied by passengers shall be continuously lighted by an emergency electric lamp, operated from the ship's main generating plant and so arranged that power may also be supplied from the emergency source of power.
(3) An electric lighting system shall be-
(a) provided throughout the ship and, in particular, upon every deck from which lifeboats or liferafts are embarked;
(b) operated from the ship's main generating plant; and
(c) so arranged that power may also be supplied from the
emergency source of power.
(4) In every ship
(a) engaged exclusively in the river trade area; or
(b) of less than 1,000 tons gross engaged in the eastern
trade area.
there shall be-
(1) provided in a position above the uppermost continuous deck or raised quarter deck and outside the machinery casings, a self-contained emergency source of electric power, so arranged as to ensure that it will function in the event of a fire or the failure, for some other reason, of the main electrical installation;
(ii) installed electric lighting of all alleyways, stairways and exits so as to ensure that access of all persons on board the ship to the launching stations and stowage positions of all lifeboats and liferafts is not impeded; and
(fi) installed electric lighting of the launching gear and of the lifeboat and liferaft launching appliances, where provided. and of the lifeboats and liferafts which they serve.
(5) The lighting requirements prescribed in sub-paragraphs (ii) and (iii) of paragraph (4) shall be operated from the ship's main electric generating plant and, in addition, shall be capable of being operated by the emergency source of electric power.
(6) The artificial lighting provided for any berthed or un- berthed passenger cabin, dining or recreation room, sanitary accommodation, galley, hospital, entrance or exit lobby shall be deemed to be adequate for the purposes of this regulation if it is at least of the standard required for crew and officer accommoda- tion under the terms of the Merchant Shipping (Crew Accommoda- tion) Regulations from time to time in operation in Hong Kong.
(Chap. 281, sob. Tel.)