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

Correct Answer: Option C — 1S

A slowly increasing starboard forward inclination indicates progressive flooding or sloshing in a forward starboard tank. Tank 1S corresponds to the forward starboard location that matches the observed list and trim changes typical of mobile offshore drilling units.