Freeboard Calculator
Calculate minimum freeboard from load line regulations and compare against actual freeboard.
Inputs
ft
ft
ft
Results
Actual Freeboard
4 ft
Minimum Freeboard2.8 ft
Margin1.2 ft
Reserve Buoyancy40%
How to Use This Calculator
- Enter the vessel's overall depth from keel to deck and the loaded draft in feet.
- Input vessel length and select the vessel type (Type A tanker or Type B general cargo).
- Review the actual freeboard (depth minus draft) and compare to the minimum freeboard.
- Check the reserve buoyancy percentage — higher values indicate more safety margin.
- If the margin is negative, reduce cargo load to achieve compliant freeboard.
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