Angle of Loll

Estimate the angle a vessel with negative initial GM will loll to.

Initial GM (m) — negative

Beam (m)

Mean Draft (m)

Angle of Loll

--°

BM (≈ B²/12T)--

GM at Loll (≈ 2|GM|/cos θ)--

Draft Increase at Loll--

tan(loll) = √(2 × |GM| ÷ BM), BM ≈ B²/12T. A lolling ship is in a dangerous condition — correct it by lowering G (press up slack tanks, remove high weight), never by shifting weight to the high side first.