🔍 Key Concepts

• Segregation of cargo tanks on tank vessels carrying flammable or combustible liquids (Grades A–D) under 46 CFR Subchapter D • Purpose and definition of cofferdams and how they relate to cargo tank boundaries • Which spaces must be kept gas-safe and separated from cargo vapors on tankships

💭 Think About

• Think about which of these spaces is specifically designed or used as a protective buffer zone between dangerous cargo and other parts of the ship. • Ask yourself: which spaces, by their very function, are expected to contain cargo vapors or equipment versus which are meant to be empty and isolated? • Consider which of these space types the regulations describe as being used to separate cargo tanks from accommodation or machinery spaces.

✅ Before You Answer

• Verify in 46 CFR Subchapter D how cofferdams are defined and what primary safety purpose they serve. • Check which of the listed spaces are normally occupied or contain machinery/equipment, and which are intended to remain void and inaccessible to cargo or fuel. • Confirm which spaces the regulations require to be segregated from cargo tanks rather than being part of the cargo handling system itself.