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Squat (Barrass)

Maximum squat in metres using the Barrass simplified formula for open water and canal / shallow conditions.

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Formula, assumptions, and limits

Smax=CBV2.0830kcanalS_{max} = \frac{C_B \cdot V^{2.08}}{30} \cdot k_\text{canal}
SymbolMeaningUnit
CBC_BBlock coefficient
VVSpeed through waterkn
kcanalk_\text{canal}Channel factor (1 open, 2 canal)
SmaxS_{max}Maximum squatm

Source: Barrass - Ship Design and Performance for Masters and Mates; PIANC WG71 - Squat report

In short

Maximum squat in metres using the Barrass simplified formula for open water and canal / shallow conditions.

Learn the theory Pilotage Operations: SOLAS V, IMO Rules, BRM