Deck Wetness - Freeboard Exceedance

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

Deck wetnessFreeboardSeakeeping

Bow freeboardmσ relative bow motionm

Deck-wetness probability: 0.1271 -

Changing the inputs requires JavaScript. The calculator above shows its default inputs and 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

In short

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

Learn the theory Seakeeping: Ship Performance in Waves