🔍 Key Concepts

• MARPOL and pollution prevention rules about discharging oily mixtures • How an oily water separator (OWS) is used to treat bilge water • Situations where pollution rules are never suspended, even in emergencies

💭 Think About

• Which option mentions equipment that is specifically designed to reduce oil content before discharge? • Are there any rules that say oil can be pumped overboard just because it is dark or the tide is going out? • In a machinery emergency, are you automatically allowed to pump oily bilges overboard, or must you still follow pollution-prevention limits?

✅ Before You Answer

• Verify when it is legal to discharge oily bilge water under MARPOL/33 CFR Part 151 • Check which method ensures the oil content is limited and monitored before going overboard • Confirm that time of day or state of tide does NOT change the legality of an oily discharge