Your vessel's drafts are: FWD 27'-09", AFT 28'-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 1.6 feet off the centerline.
• KG and KM relationship and how to find GM from the blue pages stability curves • How an off-center shift of G creates a list: use the right triangle with GM as one side and the horizontal shift as the other • Using the correct displacement / draft condition curve that matches FWD and AFT drafts
• Which curve in the blue pages matches a ship with drafts about 28 feet forward and aft? What is the approximate displacement for that condition? • Once you have the correct curve, how do you obtain KM and then GM using the given KG value? • If you picture a right triangle where the vertical side is GM and the horizontal side is the 1.6 ft shift, which trigonometric function links these to the angle of heel?
• Make sure you are reading KM from the correct displacement curve in the blue pages (not from a different loading condition). • Confirm you compute GM = KM − KG using feet and not meters, and that you use the same units for the 1.6 ft shift. • Before choosing an answer, check that the angle you compute is reasonable for a 1.6 ft shift on a vessel of this displacement (not extremely small, but not an extreme angle either).
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