Deck General · Righting Arm & GZ Curve
Raising G (shifting weight upward) on a vessel's GZ curve will:
- AIncrease the maximum GZ and the angle of vanishing stability
- BDecrease GZ values at all angles and reduce the angle of vanishing stability✓ Correct
- COnly affect the curve at angles greater than 40 degrees
- DHave no effect because GZ depends only on hull form
Explanation
Raising G reduces GM and shifts the entire GZ curve downward. Both the maximum GZ value and the angle of vanishing stability decrease, reducing the vessel's range of positive stability and its resistance to capsize.
Authority: Stability & Trim (USCG deck topic)
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