2.4.1 This sub-section should characterize the
lightship with regard to stability, trim, heeling-moment due to asymmetrical
equipment and longitudinal stress parameters.
2.4.2 If applicable, the preferred compensation
of asymmetrical light ship mass by ballast, consumables or cargo should
be explained. A warning against compensation by solid bulk cargo should
be given.
2.4.3 The concept of the distribution of consumables
in different stages of consumption, such as full, partly filled and
minimal arrival conditions, should be explained including the effect
on KG in loaded condition.
2.4.4 The concept of the compensation of increase
of KG due to fuel consumption during the voyage by taking ballast
should be explained. A suitable table or diagram should be used, where
appropriate.
2.4.5 The general stress situation in terms of
bending moments and shear forces should be commented for typical and,
if necessary, for unusual loading conditions. Warnings should be given
against extreme stress situations which may arrive with specific distributions
of cargo and/or ballast, e.g. filling the forepeak or afterpeak. Similar
warnings should be given against undue torsional moments, if appropriate.
2.4.6 The principal ballast patterns should be
explained for the carriage of heavy deck cargo, like containers, or
light cargo in the hold, like ro/ro-vehicles.
2.4.7 Specific information should be given regarding
the effect of hoisted crane booms, filled swimming pool or other heavy
top masses on the ship's stability, and the correct use of anti-rolling
devices and/or heeling tanks, if applicable.
2.4.8 All relevant operating limits with regard
to loading and distribution of cargo and ballasting should be listed
and explained, as for example:
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.1 maximum draught according to Load Line Certificate;
-
.2 maximum KGc-values according to
intact stability criteria or damage stability criteria;
-
.3 maximum allowable shear forces and bending
moments;
-
.4 restrictions to deck stowage and trim due to
SOLAS-sight lines;
-
.5 minimum draught foreward and aft with regard
to seakeeping;
-
.6 maximum draught foreward due to minimum bow
height requirement;
-
.7 maximum stack loads for container stacks;
-
.8 maximum load per area for break bulk cargoes;
and
-
.9 maximum load per hold for bulk cargoes.
Reference should be made to the Damage Control Manual and
the Cargo Securing Manual, if applicable.
2.4.9 A general warning should be given that tanks
which are not in use should, where practical, be either completely
empty or completely filled up, in particular where the stability is
marginal.
2.4.10 A general warning should be given of the
reduction of stability by a steady angle of heel of the ship. It is
essential to keep the ship upright at all times by a symmetrical distribution
of masses.