🔍 Key Concepts

• Piping and Instrumentation Diagram (P&ID) for the DEEP DRILLER’s bilge and drill water systems • How the drill water pump discharge line is cross-connected to the bilge suction line • The function of individual valves (isolation vs. crossover) in pump lineups

💭 Think About

• Look at the diagram and trace the flow from the drill water pump discharge to the bilge main or bilge suctions. Which valve, together with 26, actually completes that path? • Ask yourself: if only valve 26 is open and the second valve is closed, where does the drill water pump send water? Does it ever reach the bilge main? • Compare the locations of valves 25, 28, 29, and 41. Which one is clearly marked or positioned as the crossover or bilge connection, not just a branch or isolation valve?

✅ Before You Answer

• Verify on the diagram which valve numbers are on the same line that links the drill water pump to the bilge main when open. • Confirm which candidate valves (25, 28, 29, 41) are normally closed and only opened for emergency bilge pumping. • Check any legend or notes on the DEEP DRILLER diagram that label a valve as a bilge or emergency suction/crossover; match that label to the correct valve number.