🔍 Key Concepts

• center of gravity (G) vs center of buoyancy (B) and what each depends on • how the underwater volume/shape of the hull changes when a vessel heels or is inclined • basic stability idea: what point moves when the ship is inclined by an external force

💭 Think About

• Ask yourself: when a ship heels, does its weight distribution change, or does the shape/position of the immersed volume of water change? • Which point is tied to the geometry of the underwater volume and which is tied to the distribution of weight in the ship? • If the vessel is inclined slightly, what happens to the submerged shape on one side vs the other side of the hull?

✅ Before You Answer

• Be clear on the definitions: center of gravity (G) is fixed for a given loading condition; center of buoyancy (B) is at the center of the displaced water volume • Visualize the hull when it inclines: does the mean draft necessarily increase, or does the underwater shape simply rotate and redistribute? • Check which answer choice correctly connects the movement of B (or G) with a change in the underwater hull shape/volume when heeled.