Your vessel's drafts are: FWD 17'-05", AFT...

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Question 1 of 2066636eec28f7522a1c51d11c

Your vessel's drafts are: FWD 17'-05", AFT 20'-01"; and the KG is 22.4 feet. What is the righting moment when the vessel is inclined to 15° ? (Use the reference material in Section 1, the blue pages, of the Stability Data Reference Book)

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Question 1 of 20

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🔍 Key Concepts

• Curve of Statical Stability (GZ curve) in the Stability Data Reference Book • Relationship between displacement, GZ (righting arm), and righting moment • How to use trim and draft to select the correct displacement and GZ values from the blue pages

💭 Think About

• Which page and which specific curve or table in the blue pages tells you the GZ (righting arm) at 15° for the drafts given? • Once you know the vessel’s displacement and the GZ at 15°, how do you combine them to obtain the righting moment in foot-tons? • How does the vessel’s KG affect the GZ curve you should be using or the correction you might need to apply?

✅ Before You Answer

• Be sure you are using the correct displacement that matches BOTH the forward and aft drafts (trim included). • Confirm you are using the right GZ value at exactly 15° from the correct curve or table for the given KG, or apply the proper correction if required. • Double-check your unit consistency (feet, tons, and foot-tons) when multiplying displacement by GZ to get righting moment.

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