🔍 Key Concepts

• Ballast system line-up diagrams for the DEEP DRILLER • Difference between suction side valves (from Tank 10P) and discharge side valves (to Tank 1P) when using Port #1 ballast pump • How manifold / crossover valves are numbered on the port ballast line (valve 1 vs 2 vs 1B, etc.)

💭 Think About

• First, trace the flow path on the port side from Tank 10P to the Port #1 ballast pump: which valve numbers must be open so the pump can actually suck from 10P? • Next, from the pump discharge, trace the line to Tank 1P on the port side only: which valves along that discharge line must be open, and which option matches that exact path? • Compare the answer choices: which include all suction AND discharge valves on the port side for Port #1 pump, and which choices incorrectly include an alternate pump discharge (e.g., to Port #2 line or a different branch)?

✅ Before You Answer

• Verify on the ballast system schematic which numbered valves are on the suction line from Tank 10P to the Port #1 ballast pump. • Confirm which specific valve number sends the Port #1 pump discharge to Tank 1P, and which valve numbers instead route to a different tank or to another port pump line (e.g., valve 2 vs 1 vs 1B). • Check that your selected choice includes only port-side valves actually in the 10P → Port #1 pump → 1P path, and does not include valves that would bypass the pump or connect to Port #2 or starboard manifolds.