4.2 The BWMS should not contain or use any substance
of a dangerous nature, unless adequate arrangements for storage, application,
mitigation, and safe handling, acceptable to the Administration, are
provided to mitigate any hazards introduced thereby.
4.3 In case of any failure compromising the proper
operation of the BWMS, audible and visual alarm signals should be
given in all stations from which ballast water operations are controlled.
4.5 All working parts of the BWMS that are liable
to wear or to be damaged should be easily accessible for maintenance.
The routine maintenance of the BWMS and troubleshooting procedures
should be clearly defined by the manufacturer in the operating and
maintenance manual. All maintenance and repairs should be recorded.
4.6 To avoid interference with the BWMS, the following
items should be included:
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.1 every access of the BWMS beyond the essential
requirements of paragraph 4.4, should require the breaking of a seal;
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.2 if applicable, the BWMS should be so constructed
that a visual alarm is always activated whenever the BWMS is in operation
for purposes of cleaning, calibration, or repair, and these events
should be recorded by the control equipment;
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.3 in the event of an emergency, suitable by-passes
or overrides to protect the safety of the ship and personnel should
be installed; and
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.4 any bypass of the BWMS should activate an alarm,
and the bypass event should be recorded by the Control Equipment.
4.6 Facilities should be provided for checking,
at the renewal surveys and according to the manufacturer’s instructions,
the performance of the BWMS components that take measurements. A calibration
certificate certifying the date of the last calibration check, should
be retained on board for inspection purposes. Only the manufacturer
or persons authorized by the manufacturer should perform the accuracy
checks.