3.5.1 A control unit is a device which receives
automatic signals of:
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.1 oil content of the effluent;
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.2 flow rate of discharge;
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.3 ship's speed in knots;
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.4 date and time (GMT); and
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.5 status of the overboard discharge control.
3.5.2 The unit shall make automatic recordings
of data as specified in paragraph 5.8.2.