(11) The initial condition
of loading before flooding shall be determined as follows:
(a) The ship is loaded to its summer load water-line
on an imaginery even keel.
(b) When calculating the vertical centre of gravity,
the following principles apply:
(i) Homogeneous cargo is carried.
(ii) All cargo compartments, except those referred
to under (iii) of this sub-paragraph, but including compartments intended
to be partially filled, shall be considered fully loaded except that
in the case of fluid cargoes each compartment shall be treated as
98 per cent full.
(iii) If the ship is intended to operate at its
summer load water-line with empty compartments, such compartments
shall be considered empty provided the height of the centre of gravity
so calculated is not less than as calculated under (ii) of this sub-paragraph.
(iv) Fifty per cent of the individual total capacity
of all tanks and spaces fitted to contain consumable liquids and stores
is allowed for. It shall be assumed that for each type of liquid,
at least one transverse pair or a single centre line tank has maximum
free surface, and the tank or combination of tanks to be taken into
account shall be those where the effect of free surfaces is the greatest;
in each tank the centre of gravity of the contents shall be taken
at the centre of volume of the tank. The remaining tanks shall be
assumed either completely empty or completely filled, and the distribution
of consumable liquids between these tanks shall be effected so as
to obtain the greatest possible height above the keel for the centre
(v) At an angle of heel of not more than 5 degrees
in each compartment containing liquids, as prescribed in (ii) of this
sub-paragraph except that in the case of compartments containing consumable
fluids, as prescribed in (iv) of this sub-paragraph of this paragraph,
the maximum free surface effect shall be taken into account.
Alternatively, the actual free surface effects may be used,
provided the methods of calculation are acceptable to the Administration.
(vi) Weights shall be calculated on the basis
of the following values for specific gravities: