🔍 Key Concepts

• Oil pollution regulations for offshore rigs and vessels (discharge of oily mixtures overboard) • Purpose of bilge and oily-water handling systems (separating oil from water before discharge) • Which systems/components are designed for temporary collection vs. overboard discharge

💭 Think About

• On an offshore unit like COASTAL DRILLER, what part of the system is normally used to handle water that is contaminated with oil before it goes anywhere else? • Which of the listed options is intended to separate or collect oil, rather than simply move fluid from one place to another? • Think about MARPOL/USCG rules: is it ever acceptable to routinely send oily bilge directly overboard without treatment or control?

✅ Before You Answer

• Identify which choice is associated with oil–water separation or collection, not direct discharge • Rule out any option that suggests uncontrolled overboard discharge of oily mixtures • Ask: "Which device would the pollution-prevention plan most likely route oily bilge through first before any discharge?"