Statutory Documents - MCA Publications - PYC - A Code of Practice for Yachts Carrying 13 to 36 Passengers (The Passenger Yacht Code) - Chapter 4 - Construction, Subdivision and Stability - Part III - Subdivision, Watertight and Weathertight Integrity - 4.16 Openings in the Shell Plating below the Bulkhead Deck:
4.16 Openings in the Shell Plating below the Bulkhead Deck:
(1) The number of openings in the shell plating shall be reduced to the minimum compatible with the design and proper working of the ship.
(2) The arrangement and efficiency of the means for closing any opening in the shell plating shall be consistent with its intended purpose and the position in which it is fitted and generally to the satisfaction of the Administration.
(3) Subject to the requirements of Chapter 2, no sidescuttle or window shall be fitted in such a position that its sill is below a line drawn parallel to the freeboard deck at side and having its lowest point 2.5% of the breadth of the ship above the deepest subdivision load line, or 500 millimetres, whichever is the greater.
(4) Notwithstanding the requirements of section 2.12 all sidescuttles the sills of which are below the bulkhead deck, as permitted by subsection (3) shall be such of construction, and subject to strict procedures, as will effectively prevent any person opening them without the sanction of the master.
(5) The number of scuppers, sanitary discharges and other similar openings in the shell plating 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.
(6) All inlets and discharges in the shell plating shall be fitted with efficient and accessible arrangements for preventing the accidental admission of water into the ship.
(7) Subject to the requirements of the International Convention on Load Lines in force, and except as provided in subsection (9), each separate discharge led through the shell plating from spaces below the margin line shall comply with the following provisions-
-
(a) the discharge shall be provided with either one automatic non-return valve fitted with a positive means of closing it from above the bulkhead deck or with two automatic non-return valves without positive means of closing, provided that the inboard valve is situated above the deepest subdivision load line and is always accessible for examination under service conditions; and
-
(b) where a valve with positive means of closing 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.
(8) The requirements of the International Convention on Load Lines shall apply to discharges led through the shell plating from spaces above the margin line.
(9) Machinery room main and auxiliary sea inlets and discharges in connection with the operation of machinery shall be fitted with readily accessible valves between the pipes and the shell plating or between the pipes and fabricated boxes attached to the shell plating and the valves shall be provided with indicators showing whether they are open or closed: the location of the controls of such valves shall be so sited as to allow adequate time for operation in case of influx of water to the space, having regard to the time likely to be required in order to reach and operate such controls. If the level to which the space could become flooded with the ship in the fully loaded condition so requires, arrangements shall be made to operate the controls from a position above such level: provided that in continuously Manned Machinery Spaces the valves may be controlled locally but they shall also be provided with indicators showing whether they are open or closed.
(10) All shell fittings, valves and pipes required by this Chapter comply with the following provisions-
-
(a) shell fittings and valves shall be of steel, bronze or other approved ductile material;
-
(b) valves of ordinary cast iron or similar material are not acceptable;
-
(c) pipes shall be of steel or other equivalent material to the satisfaction of the Administration.
(11) Ports fitted below the margin line shall be of sufficient strength and shall be effectively closed and secured watertight before the ship leaves port, and shall be kept closed during navigation.
(12) Such ports shall in no case be so fitted as to have their lowest point below the deepest subdivision load line.
(13) The inboard opening of each ash-chute, rubbish-chute, etc., shall be fitted with an efficient cover.
(14) If the inboard opening is situated below the margin line, the cover shall be watertight, and in addition an automatic non-return valve shall be fitted in the chute in an easily accessible position above the deepest subdivision load line and when the chute is not in use both the cover and the valve shall be kept closed and secured.
(15) In applying this section due regard shall also be had to section 2.13 of the Code.
| Copyright 2020 Clasification Society, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasification Society, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasification Society'. Clasification Society Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasification Society entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract. |  |