In accordance with international MARPOL Annex I regulations and the federal regulations under 33 CFR Subchapter O (Pollution), for oceangoing ships of 400 gross tons and above but less than 10,000 gross tons, what is the required means for preventing pollution by oil as it pertains to handling bilge slops?
• MARPOL Annex I requirements for machinery space bilges on ships 400–10,000 GT • Differences in equipment requirements between ships below 10,000 GT and those 10,000 GT and above • Options allowed under 33 CFR Subchapter O for handling and discharging oily bilge mixtures
• Compare what equipment is mandatory for ships under 10,000 GT versus what becomes required at or above 10,000 GT (e.g., automatic stopping devices and alarms). • Ask yourself: is the regulation giving ships in this size range a single mandatory system, or does it allow them a choice between retaining oily mixtures and treating/discharging them? • Look at how the rule treats oily-water separators, 15 ppm limits, and reception facilities together—what combination is specifically tied to this tonnage bracket?
• Verify in the regulation whether a 15 ppm oily-water separator with automatic stop and alarm is required only for ships 10,000 GT and above, or also below 10,000 GT. • Check if ships of 400–10,000 GT may comply EITHER by retaining oily mixtures onboard for discharge ashore OR by using approved oily-water separating equipment. • Confirm whether the rule for this tonnage bracket uses the word “either/or” (indicating alternatives) or requires all listed devices together.
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