Deck General · Centers (G, B, M, K)
The metacenter (M) is defined as:
- AThe point about which a vessel rotates when bilged
- BThe intersection of the original vertical through B and the inclined vertical through B' at small angles of heel✓ Correct
- CThe highest point the center of gravity can reach before capsizing
- DThe midpoint between G and K on the vessel's centerline
Explanation
At small angles of heel (up to about 10-15 degrees), the vertical through the shifted center of buoyancy B' intersects the original centerline at a fixed point called M, the metacenter. Its position depends on hull form, not loading.
Authority: Stability & Trim (USCG deck topic)
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