🔍 Key Concepts

• Use the white pages for SS AMERICAN MARINER tank capacities and LCGs, matching each tank name in ST-0145 (DB, DT, DIS/WATER) to the correct table line • Recall the combined LCG formula: total moment divided by total weight, all measured from the forward perpendicular (FP) • Be careful with port/starboard pairs (P/S): their transverse location cancels, but their longitudinal LCGs are the same, so you still include both weights in the longitudinal calculation

💭 Think About

• How do you turn each entry in ST-0145 (like DB 4 P 128.1) into a longitudinal moment using the data in the Stability Data Reference Book? • Once you have all individual moments, what single division step gives you the overall LCG of the entire liquid load from FP? • Looking at the multiple‑choice answers, which range of values makes sense compared with the forward‑most and after‑most tank LCGs in the white pages?

✅ Before You Answer

• For every listed tank, verify you used the correct LCG-FP value and corresponding volume/weight from the white pages (not the light‑ship data). • Confirm you added all liquid weights from ST-0145 to find the correct total W before dividing: (LCG = \frac{\sum(w \times LCG)}{\sum w}). • Double‑check that you are measuring all distances from FP, not from midships or another reference line, to match the question wording and the white‑page tables.