Tankerman · Operations — COW
Crude oil washing (COW) is the practice of:
- ACleaning tanks with seawater after every voyage
- BUsing the cargo's own crude oil under pressure to clean clingage from tank surfaces during discharge✓ Correct
- CAdding detergent to the cargo
- DWashing the deck with crude oil
Explanation
COW directs jets of the cargo crude onto tank surfaces during discharge to remove clingage, increasing outturn and reducing the oily residue and slop that would otherwise be generated by water washing.
Authority: Tank Vessel Operations / MARPOL Annex I
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