In accordance with the international MARPOL Annex VI regulations, what is a permissible alternative to burning oil residue sludge in an appropriate incinerator?
• MARPOL Annex VI (Air Pollution) rules on how oil residues (sludge) may be disposed of • The difference between burning in an incinerator versus using a boiler or main/auxiliary engine as a means of disposal • Location limitations: what does MARPOL say about burning sludge in port / harbors / estuaries vs. on the high seas?
• Think about why MARPOL Annex VI exists: to reduce air pollution from ships. Would it make sense for it to allow unrestricted burning of sludge in all locations? • Compare the answer choices: which ones allow burning in engines vs. boilers only, and which ones impose geographical limits? Which combination best fits a pollution-control regulation? • Ask yourself: is there usually more restriction or less restriction on emissions while a ship is close to shore and ports?
• Verify whether MARPOL Annex VI specifically allows sludge to be burned in an engine and/or boiler in addition to an incinerator. • Check if there is a requirement that such burning occur only in unrestricted waters, away from ports, harbors, and estuaries. • Confirm that options which allow burning "without restriction in terms of vessel location" are consistent (or inconsistent) with MARPOL’s pollution-prevention goals.
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