🔍 Key Concepts

• Trim and how it is calculated from forward and aft drafts • Definition of MT1 (Moment to Change Trim 1 inch) and its relationship to displacement and longitudinal stability • Using the Stability Data Reference Book blue pages tables: how to interpolate or select the correct MT1 value

💭 Think About

• First, determine whether the vessel is trimmed by the head or by the stern using the given drafts. How much trim (in feet and inches) do these drafts represent? • Ask yourself: which displacement condition in the blue pages would correspond to this draft condition, and how do you locate the MT1 for that condition? • Consider whether you need to interpolate between two tabulated values in the book, or if one entry directly matches your condition.

✅ Before You Answer

• Confirm your total trim (difference between forward and aft drafts) and note whether it is by the head or stern before going to the tables. • Verify that you are using the correct ship type and displacement column/row in the blue pages that match this draft condition. • Double-check any interpolation: are you correctly weighting between the two nearest MT1 values if your exact condition is not listed?