Last updated: 2026-04-27Contact: developer@captaincalc.com.tr
Reference basis: IMO/COLREG/STCW concepts, nautical practice, approved ship documents, and CaptainCalc calculation notes. Always verify operational decisions with official sources.
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Ship Squat Effect Calculator (Barras 2004)
Empirical estimate of maximum bow squat using the Barras (2004) method. Supports open-water and confined-channel modes with Blockage Factor S.
Empirical estimate only. Use speed through the water (STW), not SOG, and verify the result against approved vessel-specific squat data, company procedures, port requirements, and the passage plan.
Formula reference (Barras 2004)
Open water: Smax = Cb × V2 / 100 (m, V in knots)
Confined channel: S = (B × T)/(W × D) → Smax = Cb × V2 / (100 × (1 − S))
⚠ Always verify with vessel-specific approved materials before passage.
Confined channel: S = (B × T)/(W × D) → Smax = Cb × V2 / (100 × (1 − S))
⚠ Always verify with vessel-specific approved materials before passage.
Continue this calculation and related offline workflows in the CaptainCalc Android app.