What is the purpose of segregation based on compatibility in dangerous goods on board?

• A. To maximize cargo volume at the expense of safety.
• B. To simplify labeling without regard to chemical compatibility.
• C. To reduce crew workload.
• D. To prevent dangerous interactions by keeping incompatible substances apart and to ensure safe stowage.

Answer: (D)

Segregation based on compatibility is about preventing dangerous interactions by keeping incompatible substances apart and ensuring safe stowage. When certain chemicals or materials are stored too close, leaks, spills, or even normal movement can lead to chemical reactions, heat buildup, gas release, or fires. By assigning separation rules and using physical barriers or separate compartments, crews reduce the risk of a dangerous incident during loading, transit, and unloading. This is why the reliable choice emphasizes preventing interactions and ensuring safe placement of goods. For example, oxidizers are kept away from fuels, acids away from bases, and reactive metals kept away from moisture—all to minimize the chance of harmful reactions. The goal is safety, not volume, labeling simplicity, or reducing workload.