1974

[Adopted on 28 October 1988 by Resolution MSC. 12(56)]

1 Chapter II-1, Regulation 8 Stability of passenger ships　in　da-maged
condition

The following text is inserted after the title:

"(Paragraphs 2.3, 2.4, 5 and 6.2 apply to passenger ships constructed
on or after 29 April 1990 and paragraphs 7.2, 7.3 and 7.4 apply to all
passenger ships)"

The existing text of paragraph 2.3 is replaced by the following:

"2.3 The stability required in the final condition after damage, and
after equalization where provided, shall be determined as follows:

2.3.1 The positive residual righting lever curve shall have a minimum
range of 15° beyond the angle of equilibrium.

2.3.2 The area under righting lever curve shall be at least 0.015
m-rad, measured from the angle of equilibrium to the lesser of:

.1 the angle at which progressive flooding occurs;

.2 22° (measured from the upright) in the case of
one-compartment flooding, or

27° (measured from the upright) in the case of the
simultaneous flooding of two or more adjacent compartments.

2.3.3 A residual righting lever is to be obtained within the range
specified in 2.3.1, taking into account the greatest of the following
heeling moments:

.1 the crowding of all passengers towards one side;

.2 the launching of all fully loaded davit-launched survival craft
on one side;

.3 due to wind pressure;　as calculated by the formula:
　　　　　　　　　　　　　　　　heeling moment
　　　　　　　　GZ(in metres) = --------------- + 0.04
　　　　　　　　　　　　　　　　 displacement

However, in no case is this righting lever to be less than 0.10m.

2.3.4 For the purpose of calculating the heeling moments in paragraph

2.3.3, the following assumptions shall be made:

.1 Moments due to crowding of passengers:

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