17.1 Each collision bulkhead required by regulation III/16 shall be constructed in accordance with regulation III/18 except that it shall: -
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.1 extend to the weather deck or to one deck above
the bulkhead deck, whichever is lower, in vessels certified to operate
on coastal and exposed waters; and
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.2 not be fitted with any type of penetration
or opening except penetrations may be made where they are located
as high and as far inboard as practicable and they have a means to
make them watertight.
17.2 The forward collision bulkhead required to
be on a vessel by regulation III/ 16 shall be:-
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.1 located at least 5 percent but not more than
15 percent of the length between perpendiculars (LBP) aft of the forward
perpendicular or for vessels with bulbous bows extending forward of
the forward perpendicular and contributing more than 2 percent of
the underwater volume of the vessel the bulkhead shall be located
at least 5 percent but not more than 15 percent of the LBP aft of
the mid-length of such extension; and
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.2 installed in a single plane, with no recess
or step, up to the bulkhead deck.
17.3 The after collision bulkhead on a double-ended
ferry of 20 m (65 feet) or more in length required by regulation III/16.3 shall be:
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.1 located at least 5 percent but not more than
15 percent of the LBP forward of the after perpendicular and; shall
be
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.2 installed in a single plane, with no recess
or step, at least up to the bulkhead deck.