(a) Drills for the operating of watertight doors,
sidescuttles, valves and closing mechanisms of scuppers, and rubbish-shoots
shall take place weekly. In ships in which the voyage exceeds one
week in duration a complete drill shall be held before leaving port,
and others thereafter at least once a week during the voyage. In all
ships all watertight power doors and hinged doors, in main transverse
bulkheads, in use at sea, shall be operated daily.
(b)
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(i) The watertight doors and all mechanisms and
indicators connected therewith, all valves the closing of which is
necessary to make a compartment watertight, and all valves the operation
of which is necessary for damage control cross connections, shall
be periodically inspected at sea at least once a week.
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(ii) Such valves, doors and mechanisms shall be
suitably marked to ensure that they may be properly used to provide
maximum safety.