Your sailing drafts are: FWD 24'-02", AFT 24'-10" and the GM is 4.6 feet. What will be the angle of list if #6 starboard double bottom (capacity 95 tons, VCG 2.6 feet, and 21 feet off the centerline) is filled with saltwater? (Use the data in Section 1, the blue pages, of the Stability Data Reference Book)
• Transverse GM (metacentric height) and how it affects the angle of list from an off-center weight • Using moment = weight × distance to find the heeling moment created by filling a tank off the centerline • Converting the heeling moment and displacement × GM into an angle of list (in degrees)
• How do you calculate the heeling moment produced when 95 tons of water are added 21 feet off the centerline? Write that number down clearly. • What total displacement should you use from the Stability Data Reference Book blue pages for this draft condition, and how do you combine it with the given GM of 4.6 feet? • Once you find the angle in radians from the stability formula, how do you correctly convert that value into degrees and then compare it to the answer choices?
• Make sure you are using ship’s displacement from the tables, not the 95 tons of water, as the displacement in the stability formula. • Double‑check that you are using GM in feet and that your distances off centerline are also in feet so the units are consistent. • Verify that you convert from radians to degrees (if your formula gives radians) before matching to the multiple‑choice answers.
No comments yet
Be the first to share your thoughts!