Safety & Environmental Protection (Deck) USCG Question #3085 (Set 87)

Your vessel's drafts are: FWD 18'-09", AFT 20'-05"; and the KG is 23.8 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 26° inclination if the center of gravity is 1.0 foot off center.

Official USCG Answer & Rule Citation

Correct Answer: Option C — 0.8 foot

Calculate the mean draft to select the stability curve. Find the GZ at 26 degrees for the 23.8-foot KG. Apply the correction: GZ_remaining = GZ_curve - (GG' * cos(26)). With a 1.0-foot transverse shift, the remaining righting arm is 0.8 feet.

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