3.5.1 Visual inspection should
be possible of at least one side of the inner hull structure without
the removal of any fixed structure or fitting. If such a visual inspection,
whether combined with those inspections required in 3.5.2, 4.7.7 or 4.10.16 or not, is only possible at the
outer face of the inner hull, the inner hull should not be a fuel-oil
tank boundary wall.
3.5.2 Inspection of one side
of any insulation in hold spaces should be possible. If the integrity
of the insulation system can be verified by inspection of the outside
of the hold space boundary when tanks are at service temperature,
inspection of one side of the insulation in the hold space need not
be required.
3.5.3 Arrangements for hold
spaces, void spaces and other spaces that could be considered gas-dangerous
and cargo tanks should be such as to allow entry and inspection of
any such space by personnel wearing protective clothing and breathing
apparatus and in the event of injury to allow unconscious personnel
to be removed from the space and should comply with the following:
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.1 Access should be provided:
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.1.1 to cargo tanks direct from the open
deck;
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.1.2 through horizontal openings, hatches or
manholes, the dimensions of which should be sufficient to allow a person
wearing a breathing apparatus to ascend or descend any ladder without
obstruction and also to provide a clear opening to facilitate the hoisting
of an injured person from the bottom of the space; the minimum clear opening
should be not less than 600 mm x 600 mm; and
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.1.3 through vertical openings, or manholes
providing passage through the length and breadth of the space, the minimum
clear opening of which should be not less than 600 mm by 800 mm at a height
of not more than 600 mm from the bottom plating unless gratings or other
footholds are provided.
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.2 The dimensions referred to in 3.5.3.1.2 and .1.3 may be decreased if the ability to traverse such
openings or to remove an injured person can be proved to the satisfaction of the
Administration.
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.3 The requirements of 3.5.3.1.2 and .1.3 do not apply to spaces described in
1.3.17.5. Such spaces should be provided only with direct
or indirect access from the open weather deck, not including an enclosed gas-safe
space.
3.5.4 Access from the open
weather deck to gas-safe spaces should be located in a gas-safe zone
at least 2.4 m above the weather deck unless the access is by means
of an air-lock in accordance with 3.6.