🔍 Key Concepts

• Fire main system layout and purpose on a ship • How sea water is brought from outside the hull into pipelines • Typical components: sea chest, strainers, pumps, valves

💭 Think About

• Which component is actually in contact with the sea outside the hull and designed to admit water into the system? • Which items listed are more likely to be internal parts of machinery or separation spaces rather than sea inlets? • Think about the normal flow path: sea → hull fitting → piping/strainer → fire pump → fire main. Where in this chain is the direct connection to the sea?

✅ Before You Answer

• Identify which option is a hull fitting or intake below the waterline • Eliminate any components that are pump parts or spaces between tanks/compartments, not actual sea inlets • Confirm which item is commonly shown on general arrangement / piping diagrams as the starting point for sea water systems