🔍 Key Concepts

• MARPOL regulations for oil pollution prevention and how they limit oil content in discharged water • The function of an oily water separator (OWS) and an oil content meter (PPM monitor) • Typical oil-in-water discharge limits (PPM) for machinery space bilges on ships

💭 Think About

• Think about what international and U.S. regulations say about the maximum oil content (in PPM) allowed in bilge water discharged overboard. • Consider which listed device is specifically designed, as a matched set, to treat bilge water and continuously monitor its oil content before discharge. • Ask yourself: which option describes standard, regulatory-compliant bilge discharge equipment, and which ones are just general machinery or filtration items?

✅ Before You Answer

• Verify the legal PPM limit for oil content in bilge water that can be discharged overboard under normal conditions. • Check which options actually include both an oily water separator and an oil content monitor/detector meeting that limit. • Confirm that any alternative equipment (like purifiers or strainers) are not recognized substitutes for a compliant oily water separator system.