The sailing drafts are: FWD 24'-03", AFT...

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Question 1 of 2066636eec28f7522a1c51cc4e

The sailing drafts are: FWD 24'-03", AFT 25'-03" and the GM is 5.5 feet. Use the information in Section 1, the blue pages of the Stability Data Reference Book, to determine the available righting arm at 30° inclination.

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🔍 Key Concepts

• Initial GM vs. righting arm (GZ) and how they relate for small angles of heel • Using the Stability Data Reference Book, Section 1 (blue pages) curves/tables for a given displacement and trim • Effect of trim by the stern on the righting arm at 30°

💭 Think About

• From the given forward and aft drafts, what is the ship’s approximate mean draft and trim, and how does that point you to the correct displacement curve/table in Section 1? • Once you know the displacement, where in the blue pages do you find the GZ (righting arm) value for 30° and how do you adjust (if needed) for the ship’s actual trim? • How does the given GM of 5.5 feet help you confirm that the GZ value you selected is reasonable for 30° of heel?

✅ Before You Answer

• Be sure you are on the correct displacement curve/table in the blue pages before reading off GZ • Confirm you are reading the GZ at 30°, not a different angle or a KN (sine curve) without proper conversion • Verify whether the table/curve already includes trim corrections or if a separate trim correction must be applied for the actual drafts given

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