1 The master shall be supplied with such information to the
satisfaction of the Administration as is necessary to enable him by rapid and simple
processes to obtain accurate guidance as to the stability of the ship under varying
conditions of service. A copy of the stability information shall be furnished to the
Administration.
2 The information should include:
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.1 curves or tables of minimum operational
metacentric height (GM) and maximum permissible trim versus draught which
assures compliance with the intact and damage stability requirements where
applicable, alternatively corresponding curves or tables of the maximum allowable
vertical centre of gravity (KG) and maximum permissible trim versus
draught, or with the equivalents of either of these curves or tables;
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.2 instructions concerning the operation of cross-flooding
arrangements; and
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.3 all other data and aids which might be necessary
to maintain the required intact stability and stability after damage.
3 The intact and damage stability information required by
regulation 5-1.2 shall be presented as consolidated data and encompass the full
operating range of draught and trim. Applied trim values shall coincide in all stability
information intended for use on board. Information not required for determination of
stability and trim limits should be excluded from this information.
4 If the damage stability is calculated in accordance with
regulation 6 to regulation 7-3 and, if applicable, with regulations 8 and 9.8, a
stability limit curve is to be determined using linear interpolation between the minimum
required GM assumed for each of the three draughts ds,
dp and dl. When additional subdivision indices
are calculated for different trims, a single envelope curve based on the minimum values
from these calculations shall be presented. When it is intended to develop curves of
maximum permissible KG it shall be ensured that the resulting maximum KG
curves correspond with a linear variation of GM.
5 As an alternative to a single envelope curve, the
calculations for additional trims may be carried out with one common GM for all
of the trims assumed at each subdivision draught. The lowest values of each partial
index As, Ap and Al across these
trims shall then be used in the summation of the attained subdivision index A
according to regulation 7.1. This will result in one GM limit curve based on the
GM used at each draught. A trim limit diagram showing the assumed trim range
shall be developed.
6 When curves or tables of minimum operational metacentric
height (GM) or maximum allowable KG versus draught are not provided, the
master shall ensure that the operating condition does not deviate from approved loading
conditions, or verify by calculation that the stability requirements are satisfied for
this loading condition.