🔍 Key Concepts

• Typical locations where bilge systems are designed to remove accumulated water on mobile offshore drilling units (MODUs) like DEEP DRILLER • The difference between tanks (for storing liquids) and spaces/compartments (where water might collect unintentionally) • Why chain lockers in columns or void-like spaces are important from a flooding and stability standpoint

💭 Think About

• Ask yourself: Which of these options describes an area where unwanted water could collect and must be pumped out for safety, rather than a tank used for normal operations? • Consider how bilge systems are usually arranged: Do they normally take suction directly from service or drill water tanks, or from spaces that could flood? • Look at the choices mentioning chain lockers. On a column-stabilized unit, where are chain lockers most likely to be considered bilgeable spaces rather than just storage?

✅ Before You Answer

• Verify which option refers to compartments/spaces rather than operational tanks • Identify which chain lockers (if any) are located in areas similar to the voids, cofferdams, and access trunks already listed in the question • Eliminate any choice that is clearly a service tank used for storing water, not a space where bilge suction is normally arranged