OUPV & 100-Ton Master · Stability
Adding weight high on a vessel (e.g., passengers moving to an upper deck) tends to:
- ARaise the center of gravity and reduce stability✓ Correct
- BLower the center of gravity and improve stability
- CHave no effect on stability
- DIncrease reserve buoyancy
Explanation
Weight added high raises the vertical center of gravity (G), reducing the metacentric height GM and the righting arm — making the vessel more tender and prone to capsize. On small passenger vessels, controlling passenger movement is a real stability concern.
Authority: Stability principles; 46 CFR Subchapter S
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