Ingangsdatum: 01-07-0200
Objective: This section
provides for consideration of the risks of green
water being shipped aboard and the resulting
consequences with respect to the vessels stability
and safety of personnel on deck. |
6.1 The standards for water
freeing arrangements should comply with ICLL as far as it is
reasonable and practicable to do so.
In any case the intention should be to achieve a standard of safety
which is at least equivalent to the standard of ICLL.
Additionally, where a well is created on each side of the vessel
between a superstructure or deckhouse, and the bulwark in way of
that superstructure or deck house, the following formula may be used
to determine the required freeing port areas on each side of the
vessel for the well concerned:
On sailing vessels, where the solid bulwark height does not exceed
150mm, specific freeing ports, as defined above, are not
required.
6.2 In individual cases, when the Administration
considers that the requirements of ICLL cannot be met, the
Administration may consider and approve alternative arrangements to
achieve adequate safety standards. Freeing arrangements may take
account of a reduced permeability and volume of the well, when
compared to a full size well.
In considering an individual case, the Administration will take into
account the vessels past performance in service and the declared
area(s) of operation and any other conditions which restrict the use
of the vessel at sea which will be recorded on the load line
certificate issued to the vessel. (See section 4.1.)
6.3 Recesses
6.3.1 Any recess in the weather deck should be of
weathertight construction and should be self draining under all
normal conditions of heel and trim of the vessel.
A swimming pool or spa bath open to the elements should be treated
as a recess.
6.3.2 The means of drainage provided should be
capable of efficient operation when the vessel is heeled to an angle
of 100 in the case of a motor vessel (see 10A.2), and 300 in the
case of a sailing vessel.
The drainage arrangements should have the capability of draining the
recess (when fully charged with water) within 3 minutes when the
vessel is upright and at the load line draught. Means should be
provided to prevent the backflow of sea water into the recess.
6.3.3 When it is not practical to provide drainage
which meets the requirements of 6.3.2, alternative safety measures
may be proposed for approval by the Administration. Where the above
requirements for quick drainage cannot be met, the effect on intact
and damage stability should be considered taking into account the
mass of water and its free surface effect.