Deck General · Angle of Loll
A vessel is at an angle of loll to starboard. The CORRECT action to return the vessel upright is to:
- ATransfer ballast immediately from starboard to port to counter the heel
- BLower G by adding ballast low in the ship or removing top-weight before attempting any transverse correction✓ Correct
- CFill all port ballast tanks simultaneously to force the vessel upright
- DIncrease speed to use hydrodynamic forces to right the vessel
Explanation
With a lolling vessel, G is above M (negative GM). Adding ballast to the low side first can cause the vessel to snap violently through upright to the other side — a dangerous lurch. The correct action is to restore positive GM first (add low ballast or remove top-weight), then correct any residual list.
Authority: Stability & Trim (USCG deck topic)
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