Seakeeping - MSW / MSH Comfort Criterion

Motion sickness incidence from ISO 2631-1 / NORDFORSK - integrated weighted acceleration exposure over 2 hours.

SeakeepingComfortMSW

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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

\text{MSI} = f(a_w, t) \approx a_w \cdot t_{min}

Symbol	Meaning	Unit
$\sigma_z$	σ vertical acceleration	m/s²
$a_w$	Frequency-weighted acceleration	m/s²

Source: ISO 2631-1:1997

Motion sickness incidence from ISO 2631-1 / NORDFORSK - integrated weighted acceleration exposure over 2 hours.