Your vessel's drafts are: FWD 17'-07", AFT...

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Question 1 of 2066636eec28f7522a1c51d11e

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 remaining righting arm at 30? inclination if the center of gravity is 0.9 foot off the centerline.

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Question 1 of 20

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🔍 Key Concepts

• GZ (righting arm) curve usage from the Stability Data Reference Book • Effect of an off-center KG on the righting arm at a given angle • How to read displacement and KM (or GZ) for a given draft condition

💭 Think About

• First, with the given drafts, what displacement condition and GM/GZ curve in the blue pages applies to this vessel? • At 30° of heel, what is the uncorrected GZ from the curve, and how does a transverse off-center KG change that value? • How does the horizontal shift of G off the centerline project onto the heeled waterline at 30° to reduce the effective righting arm?

✅ Before You Answer

• Be sure you are using the correct displacement / draft curve in the blue pages that matches the mean draft. • Confirm that you convert 0.9 foot off centerline into the correct trigonometric component at 30° (sine vs cosine). • After applying the correction, check that your final GZ value is reasonable compared to the original GZ at 30° (it should be smaller, not larger).

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