A floating jack-up with displacement of 15,000 kips has its LCG 108 feet aft of frame zero (AFO). If 400 kips are loaded at 120 feet AFO and 800 kips are loaded 150 feet AF0, what is the new LCG?

Correct Answer: Option C — 110.4 feet

New LCG is computed by dividing total longitudinal moments by total displacement. Summing initial moments ($15,000 \times 108$) with added weights ($400 \times 120$ and $800 \times 150$) divided by total displacement ($16,200$) results in an updated LCG of 110.4 feet.