18.1 Where a vessel is required to be fitted with
watertight collision or subdivision bulkheads, each watertight bulkhead
shall be of sufficient strength to be capable of remaining watertight
with a head of water to the top of the bulkhead.
18.2 Each watertight bulkhead shall extend to
the bulkhead deck and shall be installed in one plane without steps
or recesses insofar as in reasonable and practicable. Any steps or
recesses permitted shall comply with the applicable subdivision requirements
in this chapter.
18.3 The number of penetrations in a watertight
bulkhead shall be minimised. A penetration in a watertight bulkhead
shall be as high and as far inboard in the bulkhead as practicable,
and made watertight.
18.4 Sluice valves shall not be permitted in watertight
bulkheads.
18.5 A door fitted in a watertight bulkhead shall
be of watertight construction and be kept closed at sea, unless opened
at the discretion of the Master.
18.6 The Administration shall determine the extent
to which this regulation is applied to existing vessels.