🔍 Key Concepts

• Using the Stability Data Reference Book, Section 1 (blue pages) to find the Vessel Particulars table, including displacement, TPI (tons per inch immersion), and MCT 1" (moment to change trim one inch) for the given mean draft • How to calculate the trimming moment: cargo weight × its distance from the longitudinal center used in the tables (often LCF or amidships, depending on the data given) • Using the trim change (in inches) and dividing it between forward and aft drafts based on where the trim is applied (about LCF)

💭 Think About

• First, what is the vessel’s displacement and hydrostatic constants (TPI, MCT 1") at the initial mean draft, according to the blue pages? • After you compute the total trimming moment for the 295 tons of cargo, how do you convert that moment into inches of trim using the MCT 1" for that draft? • Once you know the total trim in inches, how do you split that change between forward and aft drafts to get the new drafts, and how does the sign/direction of the trim affect which draft increases and which decreases?

✅ Before You Answer

• Make sure you are using the correct displacement, TPI, and MCT 1" line from the blue pages for the initial mean draft (before loading the cargo). • Confirm you are measuring the cargo’s lever arm from the same reference point used in the Stability Data Reference Book (often amidships or LCF) so the trimming moment is correct. • After getting the forward and aft drafts, check that the change in mean draft matches the added weight using TPI, and that the aft draft changes in the correct direction for cargo loaded aft.