TREATIES (3.) Efficient hinged inside deadlights arranged so that they can be easily and effectively closed and secured watertight shall be fitted to all sidescuttles- (a) which are required to be of a non-opening type; (b) which are to be fitted within one-eighth of the ship's length of the forward perpendicular; (c) which are to be fitted in positions defined in sub-paragraph (2) (b); (d) which will not be accessible during navigation; (e) which are to be fitted in spaces intended for the accommoda- tion of sailors and firemen; (f) which are to be fitted in spaces intended for the accommoda- tion of steerage passengers. (4.) Sidescuttles fitted below the bulkhead deck, other than those referred to in the preceding paragraph, shall be fitted with efficient inside deadlights which may be portable and stowed adjacent to the sidescuttles. (5.) Sidescuttles and their deadlights, which will not be accessible during navigation, shall be closed and secured before the ship proceeds to sea. (6.) No sidescuttles shall be fitted in any spaces which are appro- priated exclusively to the carriage of cargo or coal. (7.) Automatic ventilating sidescuttles shall not be fitted in the ship's sides below the margin line without the special sanction of the Administration. (8.) All machinery and other inlets and discharges in the ship's sides shall be arranged so as to prevent the accidental admission of water into the ship. (9.) The number of scuppers, sanitary discharges and other similar openings in the ship's sides shall be reduced to the minimum either by making each discharge serve for as many as possible of the sanitary and other pipes, or in any other satisfactory manner. (10.) Discharges led through the ship's sides from spaces below the margin line shall be fitted with efficient and accessible means for preventing water from passing inboard. It is permissible to have for each separate discharge either one automatic non-return valve fitted with a positive means of closing it from above the bulkhead deck, or, alternatively, two automatic non-return valves without such means, the upper of which valves is so situated above the deepest subdivision loadline as to be always accessible for examination under service conditions. Where a positive action valve is fitted, the operating position above the bulkhead deck shall always be readily accessible and means shall be provided for indicating whether the valve is open or closed. (11.) Gangway, cargo and coaling ports fitted below the margin line shall be of sufficient strength. They shall be effectively closed 1212
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