🔍 Key Concepts

• Center of gravity (G) and how its vertical position affects stability • The definition of metacenter and its relationship to G and GM (metacentric height) • What happens when G moves up to the same level as another key stability point

💭 Think About

• Think about which term describes a specific point in the ship about which the vessel heels and that stability is measured from, not a distance or radius. • Ask yourself: when the center of gravity rises, at what point does the vessel lose its ability to return to upright (i.e., when does GM become zero)? • Consider which choice names a location versus which choices describe a distance or are informal/incorrect terminology.

✅ Before You Answer

• Verify which option refers to the geometric point used to measure initial stability, not a distance. • Check which term is associated with the condition when G coincides with that point and GM = 0. • Eliminate any answer that sounds like it refers to a radius, distance, or informal phrase rather than a defined stability point in naval architecture.