Safety & Environmental Protection (Deck) USCG Question #3089 (Set 87)

Your vessel's drafts are: FWD 17'-05", AFT 20'-01"; and the KG is 25.6 feet. What is the righting moment when the vessel is inclined to 45°? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

Official USCG Answer & Rule Citation

Correct Answer: Option B — 19,709 foot-tons

Righting moment is calculated as Displacement multiplied by the Righting Arm (GZ). Using the Stability Data Reference Book, determine the mean draft to find displacement, then apply the GZ value for a 45-degree inclination corrected for the specific KG. The resulting product yields 19,709 foot-tons.

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