12.1 Where the tanker is engaged in a multiple-port
discharge the Oil Record Book should indicate if tanks were crude
oil washed at previous discharge ports or at sea. It should be determined
that all tanks which will be, or may be, used to contain ballast on
the forthcoming voyage will be crude oil washed before the ship leaves
the port. There is no obligation to wash any tank other than ballast
tanks at a discharge port except that each of these other tanks must
be washed at least in accordance with paragraph 6.1 of the Revised
Specifications. The Oil Record Books should be inspected to check
that this is being complied with.
12.2 All crude oil washing must be completed before
a ship leaves its final port of discharge.
12.3 If tanks are not being washed in one of the
preferred orders given in the Manual, the inspector should satisfy
himself that the reason for this and the proposed order of tank washing
are acceptable.
12.4 For each tank being washed it should be ensured
that the operation is in accordance with the Operations and Equipment
Manual in that:
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.1 the operation of deck-mounted machines and
submerged machines is verified by reference either to indicators,
or to the sound patterns of the machines, or by other approved methods;
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.2 the deck-mounted machines, where applicable,
are programmed as stated;
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.3 the duration of the wash is as required;
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.4 the number of tank washing machines being used
simultaneously does not exceed that specified.