Salt water ballast is to be discharged into the #6 port and starboard wing tanks. Which combination of valves, illustrated, must be opened, and which valves should be closed? GS-0139

Correct Answer: Option C — 1, 3, 5, 6, 8 and 10 open; 2, 4, 7 and 9 closed.

Ballast operations require establishing a specific flow path from the sea chest through the pump to the designated tanks. Opening valves 1, 3, 5, 6, 8, and 10 creates the necessary suction and discharge alignment while isolating the system from other compartments, ensuring safe and controlled fluid transfer per standard piping diagrams.