Deck Wetness - Freeboard Exceedance

Probability of bow freeboard exceedance (deck wetness) per wave encounter using the Rayleigh distribution and motion σ.

Deck wetnessFreeboardSeakeeping

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

P_{wet} = \exp(-F_B^2 / 2\sigma_z^2)

Symbol	Meaning	Unit
$F_B$	Bow freeboard	m
$\sigma_z$	σ bow relative motion	m

Source: NORDFORSK 1987 - Assessment of Ship Performance

Probability of bow freeboard exceedance (deck wetness) per wave encounter using the Rayleigh distribution and motion \u03c3.