3.7.7 Load lines should be assigned to surface
units as calculated under the terms of the 1988 LL Protocol and should
be subject to all the conditions of assignment of that Protocol.
3.7.8 Where it is necessary to assign a greater
than minimum freeboard to meet the provisions regarding intact or
damage stability or on account of any other restriction imposed by
the Administration, regulation 6(6) of the 1988 LL Protocol should
apply. When such a freeboard is assigned, seasonal marks above the
centre of the ring should not be marked and any seasonal marks below
the centre of the ring should be marked. If a unit is assigned a greater
than minimum freeboard at the request of the owner, regulation 6(6)
need not apply.
3.7.9 Where moonpools are arranged within the
hull in open communication with the sea, the volume of the moonpool
should not be included in the calculation of any hydrostatic properties.
If the moonpool has a larger cross-sectional area above the waterline
at 85% of the depth for freeboard than below, an addition should be
made to the geometric freeboard corresponding to the lost buoyancy.
This addition for the excess portion above the waterline at 85% of
the depth for freeboard should be made as prescribed below for wells
or recesses. If an enclosed superstructure contains part of the moonpool,
deduction should be made for the effective length of the superstructure.
Where open wells or recesses are arranged in the freeboard deck, a
correction equal to the volume of the well or recess to the freeboard
deck divided by the waterplane area at 85% of the depth for freeboard
should be made to the freeboard obtained after all other corrections,
except bow height correction, have been made. Free surface effects
of the flooded well or recess should be taken into account in stability
calculations.
3.7.10 The procedure described in paragraph 3.7.9
should also apply in cases of small notches or relatively narrow cut-outs
at the stern of the unit.
3.7.11 Narrow wing extensions at the stern of
the unit should be considered as appendages and excluded for the determination
of length (L) and for the calculation of freeboards.
The Administration should determine the effect of such wing extensions
with regard to the provisions relating to the strength of unit based
upon length (L).