Structural & Stability
Cleats Calculator
Calculate cleat sizing and spacing requirements for mooring and anchoring fittings.
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GZ Max Calculator
Determine the maximum righting lever (GZ) for stability assessment under the RCD.
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Object Avoidance
Check helmsman field of vision and object avoidance requirements for powered craft.
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Fuel Systems
Metal Fuel Tanks
Compliance checklist for metallic fixed fuel tanks — materials, installation, and testing requirements.
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Non-Metal Fuel Tank
Checklist for non-metallic diesel tanks outside the engine room — specific material and installation checks.
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Petrol Ventilation
Calculate petrol engine space ventilation requirements to prevent dangerous vapour accumulation.
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LPG Ventilation
Assess LPG system ventilation for galleys and enclosed spaces on recreational craft.
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Electrical & Systems
Electrical Calculator
Cable sizing and electrical system compliance calculations for AC and DC installations on boats.
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Through-Hull Fittings Test
Assembly test report generator for through-hull fittings and seacocks — generate documentation directly.
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Voltage Drop Calculator
Circuit-by-circuit voltage drop for marine AC and DC conductors, with the smallest cross-section that stays inside your target limit. Up to twenty circuits per tab.
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Documentation
W.I.N. Generator
Generate a compliant Watercraft Identification Number (WIN) for RCD II registration requirements.
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Builder's Plate Generator
Generate a compliant CE builder's plate with all mandatory fields under Directive 2013/53/EU — ready to send to your signmaker.
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Principal Data Reference
Illustrated reference to the ISO 8666:2020 principal data definitions — lengths, beams, depths, draughts, masses, and loading conditions — in plain language for CE certification work.
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The client compliance portal
The tools on this page are a sample. Yards working with Blue Peter Marine get a private portal built around the Recreational Craft Directive, kept current as the standards change.
Ask about portal access- Checklists for each essential requirement, with the latest versions
- Built-in engineering checks, such as ISO 12215-5 tank plating thickness
- Document upload and a certificate register for each project
- New and updated tools added as standards are revised