On the DEEP DRILLER, among the starboard-side valves to open when deballasting from ballast tank 2S is valve __________.

Correct Answer: Option B — 5

Deballasting operations on the DEEP DRILLER require specific manifold valve configurations. Valve 5 is an integral component of the starboard-side deballasting suction and discharge routing, ensuring smooth water evacuation from ballast tank 2S.