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This is to establish the exact quantity of sludge discharged from the vessel to a bunker tanker or truck. The appointed Surveyor will therefore physically measure all sludge related tanks before and after discharge and the bunker tanker or truck before and after receiving the sludge. The Surveyor will also record the fuel consumption data in combination with the amount of sludge produced on board since the last sludge disposal, so percentage of sludge against fuel consumed can be calculated and mentioned in the final report.
At same time BS surveyors will perform a full ROB and audit onboard