Your vessel's drafts are: FWD 24'-07", AFT 25'-09"; and the KG is 24.0 feet. What is the righting moment when the vessel is inclined to 15° ? (Use the selected stability curves in Section 1, the blue pages, of the Stability Data Reference Book)
• Using the vessel’s displacement at the given drafts from the Stability Data Reference Book • Reading the GZ (righting arm) value at 15° from the selected stability curves • Calculating righting moment using displacement and GZ
• Have you first determined the vessel’s displacement that corresponds to the drafts 24'-07" FWD and 25'-09" AFT from the blue pages? • Once you find the GZ at 15°, how do you combine that with the ship’s displacement to get a moment in foot-tons? • Are you sure you are using the correct curve (KG = 24.0 ft) for reading the GZ at 15°?
• Verify you are on the correct stability curve that matches KG = 24.0 ft • Confirm the units of displacement (long tons) and GZ (feet) before multiplying • Double-check that you used the exact angle 15° when reading GZ from the curve, not a nearby angle.
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