Tank cleaning is one of the key operations
on board tanker carriers as it removes any hydrocarbon vapours, liquids or
residues from tanks. Tank cleaning is required for many reasons, such as to
carry clean ballast, remove sediments from tank top plating, prepare the
tankers for internal inspections or prior to entering dry dock.
For ships certified of Noxious Liquid Substances in bulk, the
Procedures & Arrangements Manual (P&A) is a requirement as outcome of
MARPOL Annex II, which includes the details of tank washing.
Recently IMO has adopted MARPOL Annex II and IBC &
BCH codes amendments to address the issues of tank washing with high viscosity
(but not harmful) oil which were washed ashore in the English Channel. In this
regard a new special area has been incorporated under the title “North Western
European Waters”.
Following the amendments, MEPC. 315 (74) requires the revision of P&A manuals in
order to include the new requirements. As these requirements are going to come
into force on 1st January 2021, the P&A Manual amendments shall be required
to be actioned by all ships subject to MARPOL Annex II surveys, by the date of
entry into force.
MEPC. 315 (74) may be read at
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