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IS Code - Severe-Wind & Rolling Criterion

Intact stability weather criterion (IS Code §2.3) - the dead-ship side-wind + roll assessment that governs many passenger and offshore vessels.

IS CodeStabilityWeather
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Formula, assumptions, and limits

lw1=PAZ1000gΔ,lw2=1.5lw1l_{w1} = \frac{P \cdot A \cdot Z}{1000\,g\,\Delta}, \quad l_{w2} = 1.5 \cdot l_{w1}
SymbolMeaningUnit
PPWind pressureN/m²
AALateral wind area
ZZCentroid above WL/2m
Δ\DeltaDisplacementt

Source: IMO 2008 IS Code §2.3

In short

Intact stability weather criterion (IS Code \u00a72.

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