Your vessel's drafts are: FWD 17'-07", AFT 16'-09"; and the KG is 21.5 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 30° inclination.
Official USCG Answer & Rule Citation
Correct Answer: Option D — 3.6 feet
Calculate the mean draft and use the KG of 21.5 feet to reference the stability curves. At 30 degrees, the righting arm is extracted. This calculation is essential for verifying the vessel's righting moment, ensuring it remains within the safe operating envelope required by maritime stability and safety standards.
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