🔍 Key Concepts

• Use the Stability Data Reference Book blue pages that correspond to the vessel’s draft condition (mean draft from forward and aft drafts). • Understand how to use KG with the selected stability curve: check whether the curve is already corrected for KG or if you must apply a correction from a table. • Locate the righting arm (GZ) value at the specified heel angle (37°) on the appropriate curve or by interpolation.

💭 Think About

• How do you calculate the vessel’s mean draft from the given forward and aft drafts, and which curve set in the blue pages would match that mean draft? • Does the selected curve already account for a KG of 23.5 ft, or do you need to apply a correction based on the difference between the tabulated KG and the actual KG? • Once you have the correct curve and KG adjustment, what is the GZ value at 37°, and do you need to interpolate between angles or KG lines to get it?

✅ Before You Answer

• Confirm you are using the correct displacement/mean draft curve set in the blue pages for the given drafts. • Verify whether a KG correction table or diagram must be used, and that you are using KG = 23.5 ft correctly (not confusing it with KM or GM). • Double-check that the heel angle (37°) is read or interpolated accurately on the GZ curve before comparing to the multiple-choice answers.