🔍 Key Concepts

• Typical pressure and flow requirements for portable tank cleaning machines • Common shipboard systems that deliver large volumes of seawater throughout the vessel • Why drinking water systems are usually kept separate from machinery and cargo operations

💭 Think About

• Which system on board is designed to supply high‑pressure water to many locations for hoses and nozzles? • Would it be safe or practical to use drinking water for washing down dirty cargo tanks? Why or why not? • Which of these systems would most likely be available even during emergency conditions, such as a cargo tank fire or spill?

✅ Before You Answer

• Identify which listed system is already piped to deck hydrants and hose connections for general washdown and firefighting • Eliminate any system that must be kept free from contamination for crew health • Consider which system is not normally connected to cargo tanks or inert gas equipment for safety reasons