Your vessel's drafts are: FWD 27'-06", AFT 28'-02"; and the KG is 21.3 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the righting arm at 15° inclination.
Official USCG Answer & Rule Citation
Correct Answer: Option C — 1.5 feet
Utilize the Stability Data Reference Book blue pages for the SS American Mariner. With a mean draft of 27' 10" and a KG of 21.3 feet, find the KM from the hydrostatic tables. Subtracting KG from KM gives the GM. Using the stability curves at 15 degrees, the righting arm is 1.5 feet.
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.