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GZ from KN Cross-Curve

Righting lever GZ at a given heel from the KN cross-curve value and current KG.

StabilityGZ
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Formula, assumptions, and limits

GZ=KNKGsin(ϕ)GZ = KN - KG \cdot \sin(\phi)
SymbolMeaningUnit
KNKNCross-curve value at heelm
KGKGVertical centre of gravitym
ϕ\phiHeel angle°
GZGZRighting leverm

Source: Derrett & Barrass - Ship Stability Ch.18; IMO IS Code MSC.267(85)

In short

Righting lever GZ at a given heel from the KN cross-curve value and current KG.

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