While the COASTAL DRILLER is in transit at a draft of 10 feet 6 inches, a severe storm is predicted within 12 hours. VM are 546,462 ft-kips, FSML are 18,000 ft-kips, and FSMT are 32,000 ft-kips. How much should the KG corrected for free surface effects be lowered to satisfy the maximum allowable KG criteria?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 2.34 feet
Severe storm criteria adjustments necessitate calculating the precise difference between the current free-surface corrected KG and the reduced maximum allowable KG limit mandated for high-wind ocean transits. This deficit requires lowering the vessel's vertical center of gravity by 2.34 feet to ensure positive stability.
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