Your sailing drafts are: FWD 18'-03", AFT 19'-07" and the GM is 4.3 feet. What will be the angle of list if #2 starboard double bottom (capacity 78 tons, VCG 2.7 feet, and 24.5 feet off the centerline) is filled with saltwater? (Use the data in Section 1, the blue pages, of the Stability Data Reference Book)
• Transverse statical stability and how free surfaces or off-center weights create a list • Using the Stability Data Reference Book blue pages to find the moment to list 1° per ton or similar tabular data • The relationship between heeling moment, displacement, GM, and angle of list (use of 2"): (\text{Heeling Moment} = \Delta \cdot GM \cdot \sin(\theta))
• How do you convert the tank’s weight and its distance from the centerline into a transverse heeling moment? • Once you know the heeling moment, how do the book’s tabulated values (for your specific displacement/draft condition) help you find the angle corresponding to that moment? • Why is it important that the tank is double bottom with a VCG of 2.7 ft when you are considering GM and transverse stability?
• Use the correct displacement from the blue pages that matches the given drafts before using any tabular stability values • Confirm the units of the tank capacity (tons) and the tabulated moments (e.g., ft‑tons per degree or similar) so you don’t mix systems • Double-check that you use the tank’s transverse distance off centerline (24.5 ft) to compute the correct heeling moment before relating it to an angle of list
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