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Vessel-Based Sources of Marine Pollution - extract from InforMEA e-learning course
… emissions in fumes, or oil residue in bilge and ballast water and hull washings (62%). The total annual oil spillage … high pressure crude oil which is retained rather than sea water that is discharged, resulting in a 30% drop in … so that oil cargo tanks did not need to be filled with sea water as ballast. Special areas where no discharges were …