🔍 Key Concepts

• KB + KG + GM = KMT relationship for vertical centers on a vessel • How change in draft affects the vertical center of buoyancy (KB) and thus KM • Difference between KGT (KG above keel) and GMT (GM above center of gravity)

💭 Think About

• What basic hydrostatic relation connects KGT and GMT to KMT? Think about which two you know and which one you are solving for. • If the vessel’s hydrostatic data gives you KMT at 10.5 ft draft, how would you use that value together with KGT to find GMT? • Look at the size of KGT (60 ft). Should GMT be a very large number or a moderate number above G? Compare the choices with that idea.

✅ Before You Answer

• Be clear that KGT is measured from the keel up to G, and KMT is from the keel up to the metacenter. • Verify the formula you’re using has the terms on the correct side (don’t mix up KM = KB + BM with KG + GM = KM). • Double‑check your arithmetic: after you find KMT, subtract KGT correctly and see which option matches.