🔍 Key Concepts
• Transverse stability: relationship between KG, KM, and GM (GM = KM - KG)
• Meaning of a stiff vessel versus a tender vessel (how large GM affects roll)
• How KM changes with waterplane area and displacement, especially for a MODU in lightweight condition
💭 Think About
• If KG is high but the vessel is still stiff, what does that tell you about the size of GM?
• Since GM = KM - KG, what must be true about KM if KG is already relatively high?
• Among KM', BL', and KB', which term directly affects GM in the equation for initial stability, and which are more related to buoyancy location rather than metacentric height?
✅ Before You Answer
• Write down GM = KM - KG and think about how each term affects stiffness.
• Identify which choice (KM', BL', KB') would make GM large even when KG is relatively high.
• Recall that a stiff vessel has a large positive GM, causing quick, snappy rolls—ask which parameter in the choices would most increase GM in that direction.