Weather Criterion
Stability criterion checking that a ship can withstand a steady beam wind plus a sudden gust while rolling — Part A 2.3 of the IS Code.
In practice
Built into the loading instrument's stability check; fails for unusual loading conditions (high windage, partial loads). Master adjusts ballast or cargo distribution to satisfy.
Regulatory detail & full definition
Stability criterion in 2008 IS Code Part A 2.3 testing the ship's ability to withstand a steady beam wind plus a sudden gust while rolling. The criterion compares the area under the heeling moment curve from a defined wind force against the area under the righting-moment curve, requiring a positive ratio. The wind force takes into account the lateral wind area, the pressure-area distribution, and the ship's beam. Failure of the criterion in any loading condition prevents the loading manual from being approved for service.
Authoritative source: 2008 IS Code ↗
Related
Source: 2008 IS Code Part A 2.3
High confidence
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