When discharging clean ballast, prior to entering the loading port, if the ballast is determined by the oil monitor to exceed 15 parts per million of oil, the deballasting must _________.
• MARPOL discharge limits for oil content in ballast water (15 ppm rule) • Function of the oil content monitor and automatic stopping device on oily-water/bilge separators • Difference between operational control (slowing, settling) and automatic protection when limits are exceeded
• If the monitor detects more than 15 ppm, is the crew allowed to simply slow down, let oil settle, or continue discharging in any way overboard? • What is the purpose of linking the oil content monitor to an automatic stopping or diverting system in terms of pollution prevention? • Which choice describes a response that does NOT rely on an operator’s judgment once the 15 ppm limit is exceeded?
• Verify that overboard discharge above 15 ppm is prohibited in special areas and generally under MARPOL and U.S. law • Check which options would STILL allow oilier-than-allowed water to go overboard, even briefly • Identify the option that reflects an automatic, non-optional control action triggered by the oil content monitor exceeding 15 ppm
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