6.9.1 The recording device of a control section
should include a digital printer, which may be formatted electronically
if preferred. The recorded parameters should be explicitly identified
on the printout. The printout should be legible and should remain
so once removed from the recording device and should be retained for
at least three years.
6.9.2 The data to be automatically recorded should
include at least the following:
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.1 instantaneous rate of discharge of oil (litres
per nautical mile);
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.2 instantaneous oil content (ppm);
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.3 the total quantity of oil discharged (cubic
metres or litres);
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.4 time and date (GMT);
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.5 ship's speed in knots;
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.6 ship's position - latitude and longitude;
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.7 effluent flow rate;
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.8 status of the overboard discharge control or
arrangement;
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.9 oil type selector setting, where applicable;
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.10 alarm condition;
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.11 failure (i.e. no flow, fault, etc.); and
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.12 override action (i.e. manual override, flushing,
calibration, etc.).
Any information inserted manually as a result of an override
action should be identified on the printout.
6.9.3 Data required in paragraph 6.9.2 of these
Guidelines and Specifications should be printed out, as applicable,
or may be stored electronically with printout capability, with the
following minimum frequency:
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.1 when the discharge is started;
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.2 when the discharge is stopped;
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.3 at intervals of not more than 10 min (except
when the system is in stand-by mode);
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.4 when an alarm condition develops;
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.5 when normal conditions are restored;
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.6 whenever the computed rate of discharge varies
by 10 litres per nautical mile;
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.7 when zero-setting or calibration modes are
selected; and
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.8 on manual command.
6.9.4 The recording device should be located in
a position easily accessible to the person in charge of the overboard
discharge operation.