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?
Official USCG Answer & Rule Citation
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.
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