What is indicated by a high GZ value in stability analysis?

• A. A stable vessel that is prone to listing
• B. A lower likelihood of capsizing at higher angles of heel
• C. Insufficient righting moment for the vessel
• D. A dangerous vessel that should not be operated

Answer: (B)

A high GZ value in stability analysis indicates that the vessel has a significant righting arm at various angles of heel, which translates to a lower likelihood of capsizing as the ship inclines. This righting arm is crucial for the vessel’s ability to return to an upright position after being heeled by wind, waves, or cargo shifting.

When the righting arm (GZ) is high, it means that the moment created by the buoyancy force (the upward force) relative to the center of gravity is stronger than the heeling moment (which tries to tip the vessel over). This results in a more stable vessel, allowing it to resist capsizing effectively. Thus, a higher GZ value corresponds to improved stability characteristics, especially at larger angles of heel, making option B the most accurate interpretation of a high GZ value's implications in stability analysis.