Use the material in Section 1, the blue...

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Question 1 of 2066636eec28f7522a1c51d033

Use the material in Section 1, the blue pages, of the Stability Data Reference Book. If the KG is 24.0 feet, and the drafts are: FWD 28'-01", AFT 28'-06"; at what angle will the vessel lose positive stability?

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🔍 Key Concepts

• Using the Stability Data Reference Book, Section 1 (blue pages) to find maximum righting arm (GZ) curves for given KG and draft condition • Understanding what “loss of positive stability” means in terms of the GZ curve reaching zero or going negative • How trim (different FWD and AFT drafts) affects which stability curve or table you should use

💭 Think About

• What does the GZ curve look like for a KG of 24.0 feet at approximately this displacement/draft, and where does it cross back through zero? • How do you match the given FWD and AFT drafts to the correct displacement or mean draft in the stability book tables or curves? • Once you locate the correct curve, what angle on the horizontal axis corresponds to the point where the vessel just loses positive righting arm?

✅ Before You Answer

• Make sure you are using the correct ship and correct KG line in the blue pages for this question • Confirm you are reading the angle of heel at which GZ returns to zero, not the angle of maximum GZ • Double-check that you have used the proper draft/ displacement line or curve that matches the given FWD and AFT drafts (likely via mean draft or displacement).

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