Last updated: 2026-04-14Contact: 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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Under Keel Clearance (UKC) Calculator
Calculate net UKC from charted depth, tide height, ship draft, estimated squat, and required safety margin.
Formula reference
Available Depth = Charted Depth + Tidal Height
Required Depth = Max Draft + Squat + Safety Margin
Net UKC = Available − Required
⚠ Minimum UKC typically 10% of draft for seaways. Always refer to local port authority requirements and company SMS.
Required Depth = Max Draft + Squat + Safety Margin
Net UKC = Available − Required
⚠ Minimum UKC typically 10% of draft for seaways. Always refer to local port authority requirements and company SMS.
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