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[接上页] (4) The Surveyor should see that the indicators and warning signals are efficient. Cap 369C reg 41 Classes of doors required (1) Where it is stated in this section that a door should be of a specified class, a door of a class bearing a lower number in the table in paragraph 33 may not be fitted, but a door of a class bearing a higher number may be fitted. (2) Hinged watertight doors in passenger, crew, and working spaces are only permitted above a deck, the under side of which at its lowest point at side is at least 7 feet above the deepest subdivision loadline, and they are not permitted in such spaces below such a deck. (3) Hinged watertight doors of satisfactory construction may be fitted in bulkheads dividing cargo between deck spaces, in levels in which side cargo doors would be permitted under the provision of paragraph 47. These doors shall be closed before the voyage commences and shall be kept closed during the voyage. The Surveyor should ascertain that steps have been taken for securing compliance with this condition, on the lines indicated in paragraph 43(13) relating to side scuttles and dead lights. The time of opening such doors in port and of closing them before the ship leaves port shall be entered in the official log book. Where it is proposed to fit such doors, the number and arrangements shall be submitted for consideration, and a statement shall be required from the owners certifying as to the absolute necessity of such doors. (4) All other doors shall be sliding doors and when situated with their sills above the deepest subdivision loadline may, subject to power doors being required in special cases (sub-paragraph 5(d)) be hand operated sliding doors (Class 3). (5) When any doors which may be sometimes opened at sea, excluding those at the entrances of tunnels, are fitted in the main transverse watertight bulkheads at such a height that their sills are below the deepest subdivision loadline, the following rules shall apply, subject to power operated doors (Class 5) being required in special cases (sub-paragraphs (c) and (d))- (a) When the number of such doors exceeds five they shall be power operated (Class 5) and shall be capable of being simultaneously closed from a station situated on the bridge, the closing of these doors being preceded by a warning sound signal. (b) When the number of such doors does not exceed five- (i) if the criterion numeral does not exceed 30, they may be Class 3 doors operated by hand only; (ii) if the criterion numeral exceeds 30, but does not exceed 60, they may be either Class 4 dropping doors fitted with releasing gear and hand gear operated at the door and from above the bulkhead deck, or doors operated by power; (iii) if the criterion numeral exceeds 60, they shall be power operated (Class 5) and shall be capable of being simultaneously closed from a station |