🔍 Key Concepts

• Use the white pages hydrostatic data for SS AMERICAN MARINER to find the effect of adding weight on mean draft and trim • Understand how adding weight forward of the LCF/LCB (Longitudinal Center of Flotation/Buoyancy) changes both forward and aft drafts • Separate the effect into change of mean draft (TPC/TPI) and change of trim (MT1" or MTC)

💭 Think About

• When you add 97 tons in the forepeak, will the ship trim by the head or by the stern? How should that affect the forward and aft drafts numerically? • What is the new mean draft after adding 97 tons? Once you know the mean draft and the amount of trim, can you split that trim between forward and aft using the ship’s length? • From the white pages, which tables/columns give you the data for TPC/TPI and for trimming moment per inch (or centimeter) at the original draft, and how do you interpolate if needed?

✅ Before You Answer

• Confirm you are using the correct displacement and hydrostatic data for the original mean draft in the white pages • Verify your use of TPC/TPI (tons per inch immersion) or the equivalent unit, and check unit consistency (tons vs long tons, inches vs feet) • Double‑check how you distribute the total trim between forward and aft drafts: forward draft changes by half the trim one way, aft draft changes by half the trim the opposite way, based on the sign of the trim