1 In addition to the requirements of SOLAS regulation II-1/8, ro-ro passenger
ships shall comply, subject to the provisions of paragraph 2, if applicable,
with the following:
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.1 the provisions of paragraph 2.3 of regulation 8 shall be complied with
when taking into account the effect of a hypothetical volume of seawater
which is assumed to have accumulated, subject to the provisions of
paragraph 3, on the first deck above the designed waterline of the
ro-ro cargo space or special category space as defined in SOLAS regulation II-2/3 assumed to be damaged
(referred to as "the damaged ro-ro deck" hereinafter). The other requirements
of regulation 8 need not be
complied with in the application of these requirements. The volume
of assumed accumulated seawater shall be kept the same at all trim
and heeling angles, and shall be calculated with the following distribution
density assuming that it were spread over the damaged ro-ro deck in
the ship's upright position:
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0.5 m3/m2, if the residual freeboard
(fr) is 0.3 m or less;
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0.0 m3/m2, if the residual freeboard
(fr) is 2 m or more; and
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intermediate values to be determined by linear interpolation,
if the residual freeboard (fr) is 0.3 m or more but less than 2 m,
where the residual freeboard (fr) is the minimum distance
between the damaged ro-ro deck and the final waterline at the location
of the damage in the damage case being considered without taking into
account the effect of the volume of assumed accumulated seawater on
the damaged ro-ro deck;
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.2 when a high-efficiency drainage system is installed,
the Administration may allow a reduction of the distribution density
of the volume of assumed accumulated seawater in accordance with the
guidelines developed by the Organization;footnote
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.3 for ships in geographically defined restricted
areas of operation, the Administration may reduce the distribution
density representing the volume of assumed accumulated seawater determined
in accordance with subparagraph .1 substituting such distribution
density by the following:
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.3.1 0.0 m3/m2, if the significant
wave height (hs) defining the area concerned is 1.5 m or less;
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.3.2 the value determined in accordance with subparagraph
.1, if the significant wave height (hs) defining the area concerned
is 4 m or above;
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.3.3 intermediate values to be determined by linear
interpolation, if the significant wave height (hs) defining the area
concerned is 1.5 m or more but less than 4 m;
provided
that the following conditions are fulfilled:
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.3.4 the Administration is satisfied that the
defined area is represented by the significant wave height (hs) which
is not exceeded with a probability of more than 10%; and
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.3.5 the area of operation and, if applicable,
the part of the year for which a certain value of the significant
wave height (hs) has been established are entered into the certificates;
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.4 as an alternative to the requirements of subparagraph
.1 or subparagraph .3, the Administration may exempt application of
the requirements of subparagraph .1 or subparagraph .3 and accept
proof, established by model tests carried out for an individual ship
in accordance with the model test method developed by the Organization,footnote justifying that the ship will not capsize
with the assumed extent of damage as provided in paragraph 4 of regulation
8 in the worst location being considered under paragraph 1.1 in an
irregular seaway; and
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.5 the information supplied to the master in accordance
with paragraphs 7.1 and 7.2 of regulation 8, as developed for compliance
with paragraphs 2.3 to 2.3.4 thereof, shall apply unchanged to ro-ro
passenger ships approved according to these requirements.