While the DEEP DRILLER is operating as shown in Sample Form #4 (Drilling), casing is accidentally dropped over the port side. If the port aft inclination is slowly increasing, which tank is probably damaged?

Correct Answer: Option B — 10P

A slowly increasing port aft inclination points directly to progressive flooding in an aft port ballast or storage tank. Tank 10P is located in the aft port section, producing the exact moment combination required to generate port-aft list tendencies.