The DEEP DRILLER is loaded as shown in the Sample Load Form #2 (Ballasting to Survival). What is the shift in VCG if 100.76 long tons of ballast are added to Ballast Tank #8S to replace the discharge of all bulk materials?

Correct Answer: Option C — 0.63 foot down

Adding 100.76 long tons of ballast to Tank #8S while discharging an equivalent weight of bulk materials changes the vertical center of gravity downward by 0.63 foot. Per stability calculations in 46 CFR, the net downward moment shift of the added low-level ballast versus the removed bulk materials dictates the overall VCG reduction.