Deck General · Metacentric Height (GM)
The rolling period formula T = 0.44 B / sqrt(GM) shows that as GM increases, the rolling period:
- AIncreases — the ship rolls more slowly
- BDecreases — the ship rolls more quickly✓ Correct
- CStays the same because beam dominates
- DBecomes unpredictable
Explanation
Since GM appears in the denominator under a square root, a larger GM reduces the rolling period — the ship rolls faster and snappier (stiff). A smaller GM increases the period — the ship rolls slowly (tender).
Authority: Stability & Trim (USCG deck topic)
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