2.6.1 Cargo tanks should be
located at the following distances inboard:
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.1 Type 1G ships: from the side shell plating not
less than the transverse extent of damage specified in 2.5.1.1.2 and from the moulded line of the bottom shell
plating at centreline not less than the vertical extent of damage specified in
2.5.1.2.3 and nowhere less than 760 mm from the shell
plating.
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.2 Types 2G/2PG and 3G ships: from the moulded line
of the bottom shell plating at centreline not less than the vertical extent of
damage specified in 2.5.1.2.3 and nowhere less than 760 mm from the shell
plating.
2.6.2 For the purpose of tank
location, the vertical extent of bottom damage should be measured
to the inner bottom when membrane or semi-membrane tanks are used,
otherwise to the bottom of the cargo tanks. The transverse extent
of side damage should be measured to the longitudinal bulkhead when
membrane or semi-membrane tanks are used, otherwise to the side of
the cargo tanks (see
figure 2.1).
For internal insulation tanks the extent of damage should be measured
to the supporting tank plating.
2.6.3 Except for type 1G ships,
suction wells installed in cargo tanks may protrude into the vertical
extent of bottom damage specified in 2.5.1.2.3 provided
that such wells are as small as practicable and the protrusion below
the inner bottom plating does not exceed 25% of the depth of the double
bottom or 350 mm, whichever is less. Where there is no double bottom,
the protrusion below the upper limit of bottom damage should not exceed
350 mm. Suction wells installed in accordance with this paragraph
may be ignored in determining the compartments affected by damage.
Fig. 2.1 Tank location requirements as set out in 2.6