PART I (continued)
Watertight Doors — Signals and Communications
17 (1) Every sliding watertight door shall be connected with an indicator at each position from which the door may be closed, other than at the door itself, showing whether the door is open or closed.
(2) There shall be provided in connection with every watertight door that is operated by power a means of giving an audible warning at the door itself when the door is about to be closed; the arrangement shall be such that one movement at the position from which the door is about to be closed will be sufficient to sound the signal and to close the door, the signal to precede the movement of the door by an interval sufficient to allow the movement of persons and articles away from the door.
(3) Where any door required by these Regulations to be watertight is not capable of being operated from a central control, means of communication by telegraph, telephone or otherwise shall be provided whereby the officer of the watch may communicate with the person responsible for the closing of the door.
Construction of Watertight Doors
18 (1) Every door required by these Regulations to be watertight shall be of such design, material and construction as will maintain the integrity of the watertight bulkhead in which it is fitted; any such door giving direct access to any space that may contain bunker coal shall, together with its frame, be made of cast or mild steel; any such door in any other position shall, together with its frame, be made of cast or mild steel or cast iron.
(2) Every sliding watertight door shall be fitted with rubbing faces of brass or similar material that may be fitted either on the door itself or on the door frame, and, if they are of less than 25 mm in width, shall be fitted in recesses.
(3) Where screw gear is used for operating such a door, the screw shall work in a nut of suitable non-corrodible metal.
(4) The frame of every vertically sliding watertight door shall have no grooves at the bottom thereof in which dirt may lodge; the bottom of such a frame, if it is of skeleton form, shall be so arranged that dirt cannot lodge therein; the bottom edge of every such door shall be tapered or bevelled.
(5) Every vertically sliding watertight door that is operated by power shall be so designed and fitted that, if the power supply ceases, there will be no danger of the door dropping.
(6) Every horizontally sliding watertight door shall be so installed as to prevent its moving if the ship rolls, and if necessary a clip or other suitable device shall be provided for that purpose; the device shall not interfere with the closing of the door when the door is required to be closed.
(7) The frame of every watertight door shall be properly fitted to the bulkhead in which the door is situated, and the jointing material between the frame and the bulkhead shall be of a type that will not deteriorate or be injured by heat.
(8) Every watertight coal-bunker door shall be provided with screens or other devices to prevent coal from interfering with its closing.
(9) Every watertight door shall be tested at the maker’s plant by water pressure to a head taken from the bottom of the door to the margin line, but in no case shall the test pressure be less than 6.1 m head for sliding doors and 3 m head for hinged doors; where there are several doors of the same type to be fitted, one of the type may be so tested and, provided the test is satisfactory, the remainder may be accepted; after installation in the ship, each watertight door shall be hose tested at a minimum pressure of 207 kPa to ensure integrity of the watertight bulkhead.
- SOR/95-254, s. 32
Openings in the Shell Plating below the Margin Line
19 (1) In every ship the number of side scuttles, scuppers, sanitary discharges and other openings in the shell plating below the margin line shall be the minimum compatible with the design and proper working of the ship, and no side scuttles shall be fitted below the bulkhead deck in ships of less than 150 tons, gross tonnage.
(2) The arrangements for closing each such opening below the margin line shall be consistent with its intended purpose and shall be such as will ensure watertightness.
(3) In every ship of 150 tons, gross tonnage, or over,
(a) the number of side scuttles below the margin line that are capable of being opened shall be the minimum compatible with the requirements of the proper operation of the ship;
(b) where in a between decks of such a ship the sills of any side scuttles are below a line drawn parallel to the bulkhead deck at side and having its lowest point 2 1/2 per cent of the breadth of the ship above the deepest subdivision load water line, every side scuttle in that between decks shall be of a non-opening type;
(c) where in a between decks all the sills of the side scuttles are above the aforesaid line, every side scuttle in that between decks shall be either of a non-opening type or incapable of being opened except by a person authorized to do so by the master of the ship;
(d) where other than non-opening type side scuttles are fitted, a notice shall be posted in the Chart Room stating that such side scuttles are required to be closed before the ship proceeds to sea and shall be kept closed while the ship is at sea; and
(e) similar notices shall be posted in the spaces within which such side scuttles are situated.
(4) In every ship of 150 tons, gross tonnage, or over, every side scuttle below the margin line shall be fitted with an efficient hinged deadlight of material other than ordinary cast iron, permanently attached, so that it can be readily and effectively closed and secured watertight, provided that abaft a point one-eighth of the length of the ship from the forward perpendicular and above a line drawn parallel to the bulkhead deck at side and having its lowest point at a height of 3.66 m plus 2 1/2 per cent of the breadth of the ship above the ship’s deepest subdivision load water line, deadlights may, for the purposes of these Regulations, be portable in crew spaces and in passenger spaces not appropriated for the use of steerage passengers.
(5) Side scuttles shall not be fitted below the margin line in any space that is appropriated solely to the carriage of cargo or coal; if side scuttles are fitted in spaces below the margin line that may be appropriated to the carriage of cargo or passengers, such side scuttles and their deadlights shall be so constructed as to be incapable of being opened except by a person authorized to do so by the master of the ship; where other than non-opening type side scuttles are fitted, a notice shall be posted in the Chart Room stating that such side scuttles are required to be closed before the ship proceeds to sea and shall be kept closed while the ship is at sea; similar notices shall be posted in the spaces within which such side scuttles are situated.
(6) Automatic ventilating side scuttles shall not be fitted below the margin line in the shell plating of any such ship.
(7) In every ship
(a) each inlet and discharge led through the shell plating below the margin line shall be fitted with efficient and readily accessible means for preventing the accidental admission of water into the ship;
(b) without prejudice to the generality of the foregoing, each discharge led through the shell plating from spaces below the margin line, not being a discharge in connection with machinery, shall be provided with either
(i) one automatic non-return valve fitted with a positive means by which it can be closed from a readily accessible position above the ship’s bulkhead deck and with an indicator at the position from which the valve may be closed to show whether the valve is open or shut, or
(ii) two automatic non-return valves, the upper of which is so situated above the ship’s deepest subdivision load water line as to be always accessible for examination under service conditions and is of a horizontal balanced type that is normally closed;
(c) any valve fitted in compliance with the requirements of paragraph (b) that is a geared valve, or the lower of two non-geared valves, shall be secured to the ship’s shell plating;
(d) all cocks and valves attached to inlets or discharges, or bulkhead fittings within B/5 distance from the shell plating, other than inlets or discharges connected with machinery, being cocks or valves fitted below the margin line or the failure of which may affect the subdivision of the ship, shall be made of steel, bronze, or other equally efficient material;
(e) main and auxiliary inlets and discharges connected with machinery shall be fitted with readily accessible cocks or valves between the pipes and the ship’s shell plating or between the pipes and a fabricated box attached to the shell plating and such cocks or valves of more than 76 mm diameter attached to such inlets or discharges shall be made of steel, bronze, or other equally efficient material; if made of steel they shall be protected against corrosion;
(f) discharge pipes led through the shell plating below the margin line shall not be fitted in a direct line between the outboard opening and the connection with the deck, water closet or other similar fitting, but shall be arranged with bends or elbows of substantial metal other than cast iron or lead;
(g) all discharge pipes led through the shell plating below the margin line and the valves relating thereto shall be protected from damage;
(h) all bolts connecting cocks, valves, discharge pipes and other similar equipment to the shell plating below the margin line shall have their heads outside the shell plating, and shall be either countersunk or cup-headed;
(i) efficient means shall be provided for the drainage of all watertight decks below the margin line and any drainage pipes shall be so fitted with valves or otherwise arranged as to avoid the danger of water passing from a damaged to an undamaged compartment;
(j) the inboard opening of every ash chute, rubbish chute and other similar chute shall be fitted with an efficient watertight cover, and, if such opening is below the margin line, it shall also be fitted with an automatic non-return valve in the chute in a readily accessible position above the ship’s deepest subdivision load water line; the valve shall be of the horizontal balanced type, normally closed and provided with local means for securing it in a closed position; when chutes are not being used, the cover and valve shall be kept closed and secured, and a permanent notice to this effect shall be posted in close proximity to the chute hopper; the requirements of this paragraph shall not apply to ash ejectors and expellers the inboard openings of which are in the ship’s stokehold and necessarily below the deepest subdivision load water line; such ejectors and expellers shall be fitted with means that will prevent water from entering the ship; and
(k) any gangway port, cargo port or coaling port fitted below the margin line shall be of adequate strength and its lowest point shall not be below the ship’s deepest subdivision load water line; an appropriate notice shall be posted in the Chart Room stating that all such gangway ports, cargo ports or coaling ports shall be effectively closed and secured watertight before the ship leaves port and shall be kept closed during navigation.
- SOR/95-254, s. 32
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