USCG Exam PracticeVessel stability — metacentric height, free surface
Under 46 CFR, what is the minimum initial metacentric height (GM) required for a vessel in each condition of loading?
- A. 0.66 feet (0.2 meters)
- ✓ 1.15 feet (0.35 meters)Correct
- C. 0.35 feet (0.107 meters)
- D. 2.30 feet (0.70 meters)
Why B is correct
46 CFR §28.570(a)(1) requires a minimum initial metacentric height (GM) of at least 1.15 feet (0.35 meters) in each condition of loading. Option A is the minimum righting arm (GZ) value at 30°, not the GM requirement.
Cited:46 CFR §28.570