Your vessel's drafts are: FWD 17'-09", AFT 18'-03"; and the KG is 22.4 feet. Use the selected stability curves in the blue pages of the Stability Data Reference Book to determine the angle of list if the center of gravity is shifted 1.5 feet off the centerline.
• Use the Stability Data Reference Book blue pages to find the correct curve for the ship’s displacement and KG = 22.4 ft • Relationship between off‑center G (GG₁), GM (metacentric height), and angle of list: ( \tan\theta = \frac{GG_1}{GM} ) for small angles • Difference between GZ curves (righting arms) and GM for small angles of heel/list
• From the given drafts FWD and AFT, which page/curve in the blue pages tells you the ship’s displacement to use? • Once you know KG and displacement, how do you obtain GM (or the correct GZ curve) from the book before applying ( \tan\theta = \frac{GG_1}{GM} )? • If GG₁ = 1.5 ft, after you compute ( \tan\theta ), which of the answer choices makes sense when you convert the arctangent result into degrees?
• Make sure you are using the correct displacement curve that matches the drafts given (don’t just pick any blue-page curve). • Confirm that you are using KG = 22.4 ft when selecting the stability curve or when calculating GM (don’t mix in a different KG). • After finding ( \tan\theta ), double‑check that you convert to degrees and that the angle is reasonable for a 1.5 ft shift of G.
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