🔍 Key Concepts

• Trimming moments caused by shifting or discharging weights longitudinally • Relationship between MT1" (Moment to Trim 1 inch) and change in draft at the bow and stern • Sign convention for moments forward and aft of amidships when cargo is discharged

💭 Think About

• What happens to the vessel’s center of gravity when weight is removed forward of amidships – does the ship tend to trim by the bow or by the stern? • How do you convert the weight and its distance from amidships into a trimming moment, and then into inches of trim using the MT1" from the blue pages? • Once you know the total trim change, how is that trim split between the forward and aft drafts on a ship of this length?

✅ Before You Answer

• Be sure you are using the correct sign (+/−) for a moment occurring forward of amidships when weight is discharged, not loaded. • Confirm that you are using the proper MT1" for the vessel’s mean draft from Section 1 of the Stability Data Reference Book. • After applying the trim change, verify that the mean draft change matches the change in total displacement from discharging 195 tons.