Your vessel's drafts are: FWD 18'-09", AFT...

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Question 1 of 2066636eec28f7522a1c51d127

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.

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Question 1 of 20

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🔍 Key Concepts

• Using the selected stability curves in the blue pages and matching the correct displacement for the given drafts • How an off-center KG (lateral shift of G) affects the righting arm at a given angle of heel • Difference between the basic GZ from the curve and the effective GZ after correcting for KG off center

💭 Think About

• First, what is the approximate displacement of the vessel at drafts FWD 18'-09" and AFT 20'-05", and which curve in the blue pages would you use? • Once you find the uncorrected GZ at 26°, how does shifting G 1.0 ft off center change the righting arm at that angle? Think about the geometry of G, heel angle, and the resulting horizontal separation. • Are you using the same units throughout, and are you correctly converting angles (degrees) when you apply any trigonometric function?

✅ Before You Answer

• Verify you have chosen the correct displacement curve (or nearest curve and interpolation method, if required). • Double-check that you have read GZ at 26° correctly from the curve before applying any correction. • Confirm your correction for off-center KG uses 1.0 ft × sin(heel angle) (or the appropriate trigonometric relationship) and that you add or subtract it in the correct direction to get the final righting arm.

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