🔍 Key Concepts

• Ballast piping diagram for the DEEP DRILLER, especially how the forward‑starboard column connects to the starboard ballast line • Function of suction / discharge isolation valves for each pump and each column • How cross‑connect / manifold valves allow one pump to serve different tanks or columns

💭 Think About

• First, identify on the ballast diagram which valves isolate the forward‑starboard column from the rest of the system. Which valve numbers are clearly part of that column’s branch? • Next, find the normal suction and discharge path for starboard pump #2. Which valves must be open so that this pump can pull from and discharge to the forward‑starboard column? • Look at the valves that appear only in some answer choices (for example, 3 vs. 4, and 35 vs. no 35). What do those specific valves control on the diagram—column isolation, pump isolation, or cross‑connection? How would that affect deballasting from that column using pump #2?

✅ Before You Answer

• Verify on the diagram which valve numbers are on the forward‑starboard column branch and which are only for other columns or tanks • Confirm which valve(s) connect starboard pump #2 suction and discharge to the starboard side ballast header • Check that every valve in your chosen list is necessary for flow from the forward‑starboard column to pump #2, and that you are not opening any valve that would unintentionally deballast a different column or tank