Section 33
11)
of Merchant Shipping (Safety Convention) Regulations, 2003
{a)
The definite assumptions referred to in regulation 32 relate to the permeabilities of the spaces below the margin line.
541
{b)
In determining the floodable length, a uniform average permeability shall be used throughout the whole length of each of the following portions of the ship below the margin line -
(i)
the machinery space as defined in regulation 25;
(ii)
the portion forward of the machi~ery space; and
(iii)
the portion abaft the machinery space.
(2)
{a)
The uniform average permeability throughout the machinery space shall be determined from the formula -
ra- ~~
85 + 10 L-v-J where-a = the volume of the passenger spaces, as defined in regulation 25, which are situated below the margin line within the limits of the machinery space;
c the volume of between deck spaces below the margin line within the limits of the machinery space which are appropriated to cargo, coal or stores;
v the whole volume of the machinery space below the margin line.
{b)
Where it is shown to the satisfaction of the Director that the average permeability as determined by detailed calculation is less than that given by the formula, the detailed calculated value may be used. For the purpose of such calculation, the permeabilities of passenger spaces shall be taken as 95, that of all cargo, coal and store spaces as 60, and that of double
BRUNEI DARUSSALAM GOVERNMENT GAZETTE bottom, oil fuel and other tanks at such values as may be approved in each case.
(3)
Except as provided in sub-regulation (4), the uniform average permeability throughout the portion of the ship forward of or abaft the machinery space shall be determined from the formula a 63 + 35-
v where-a = the volume of the passenger spaces, as defined in regulation 25, which are situated below the margin line, forward of or abaft the machinery space; and v = the whole volume of the portion of the ship below the margin line, forward of or abaft the machinery space.
(4)
(a} In the case of special subdivision required in sub-regulation
(5)
of regulation 34, the uniform average permeability throughout the portion of the ship forward of or abaft the machinery space shall be -
b 93-35
v where b = the volume of the spaces below the margin line and above the tops of floors, inner bottom, or peak tanks, as the case may be, which are appropriated to and used as cargo spaces, coal or oil fuel bunkers, store-rooms, baggage and mail rooms, chain lockers and fresh water tanks, forward of or abaft the machinery space; and v the whole volume of the portion of the ship below the margin line forward of or abaft the machinery space.
(b)
In the case of ships engaged on services where the cargo holds are not generally occupied by any substantial quantities of cargo, no part of the cargo spaces is to be included in calculating "b".
(5)
In the case of unusual arrangements, the Director may allow, or require, a detailed calculation of average permeability for the portions forward of or abaft the machinery space shall be required. For the purpose of such calculation, the permeability of passenger spaces shall be taken as 95, that of 542
spaces containing machinery as 85, that of all cargo, coal and store spaces as 60, and that of double bottom, oil fuel and other tanks at such value as may be approved in each case.
!6)
Where a between-deck compartment between 2 watertight transverse bulkheads contains any passenger or crew space, the whole of that compartment, less any space completely enclosed within permanent steel bulkheads and appropriated to other purposes, shall be regarded as passenger space. Where the passenger or crew space in question is completely enclosed within permanent steel bulkheads, only the space so enclosed need be considered as passenger space.
Permissible length of compartments in passenger ships.