Tankerman · Pollution — MARPOL
Oily mixtures and tank residues that cannot be discharged at sea under MARPOL are retained on board and pumped to a:
- ACargo tank for reuse
- BSlop tank, then to a shore reception facility✓ Correct
- CBallast tank for discharge underway
- DBilge for evaporation
Explanation
Tank washings and oily residues are collected in slop tanks where oil and water separate; the oil is retained and ultimately discharged to a port reception facility rather than overboard.
Authority: MARPOL Annex I / 33 CFR 151
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