🔍 Key Concepts

• Meaning of the letters in stability symbols such as KG, GM, and KB • Relationship between keel, center of gravity, center of buoyancy, and metacenter • Which points are used as reference points for vertical distances in ship stability (often the keel)

💭 Think About

• Ask yourself: In ship stability notation, what does the letter K usually stand for, and what does the letter G usually stand for? • Consider whether KG is a distance, a time, or a position. Look at each option and decide which type of quantity it describes. • Which answer choice clearly describes a vertical distance measured from a known reference point to a specific stability point on the ship?

✅ Before You Answer

• Verify what K and G represent in standard stability diagrams (cross-curves, GZ curves, etc.). • Check which choices refer to vertical height and which refer to something else like time or motion (e.g., period of roll). • Confirm that the definition you pick matches how KG is labeled and used in basic stability calculations and formulas.