Audio-visual alarms should be activated for any of the following
conditions and the monitoring system should be so arranged that the
discharge of effluent into the sea is stopped:
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.1 whenever the instantaneous rate of discharge
of oil exceeds 30 litres per nautical mile;
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.2 when the total quantity of oil discharged reaches
1/30,000footnote of the previous cargo;
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.3 in the event of failure of the systems operation,
such as: