.1 The means to ensure the watertight integrity
of internal openings which are used during the operation of the unit,
while afloat, should comply with the following:
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.1 Doors should be remotely controlled from a
central position on a deck which is above the final waterline after
flooding and should also be operable locally from each side of the
bulkhead. Indicators should be provided at the control position to
indicate whether the doors are open or closed.
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.2 The requirements regarding remote controls
in 3.6.3.1.1 may be dispensed with for those doors or hatch covers
which are normally closed while the unit is afloat, provided an alarm
system (e.g. light signals) is arranged showing personnel both locally
and at a central position, whether the doors in question are open
or closed. A notice should be affixed to each such door or hatch cover
to the effect that it is not to be left open while the unit is afloat.
.2 The means to ensure the watertight integrity
of internal openings which are kept permanently closed during the
operation of the unit, while afloat, should comply with the following:
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.1 A notice should be affixed to each such closing
appliance to the effect that it is to be kept closed while the unit
is afloat, except that manholes fitted with close bolted covers need
not be so marked.
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.2 On self-elevating units, an entry should be
made in the official log book or tour report, as applicable, to the
effect that all such openings have been witnessed closed before the
unit becomes waterborne.