Wind Propulsion Gets Its Own Rulebook

From a 1987 Footnote to a Full Rule Note

Bureau Veritas' new NR206 rule note covers wind propulsion systems in the kind of detail the growing wind-assist sector has been waiting for: modern and traditional rigs, free-standing and rotating rigs, square and kite rigs, wind and rotor sails, and suction wings. It builds on BV rules first released in 1987, updated for a generation of technology that barely existed then.

What NR206 Actually Covers

The rules address structural design for both standing and running parts of a rig, drive systems, and the base ship structure supporting it — plus construction, testing, and certification of materials and components. Two new classification notations sit alongside it: WPS 1 for standing rigging, and WPS 2 for standing and running rigging together, both providing load cases and coefficients across the full range of wind propulsion technologies. The rules cover the full lifecycle — design review through installation and ongoing operations, including maintenance and survey — and are built to confirm operators have genuinely done the underlying risk analysis and ship strength assessment before adopting the technology, not just installed it.

What This Means for Crews on Wind-Assisted Vessels

• If your vessel carries or is being fitted with wind propulsion, know which notation (WPS 1 or WPS 2) applies and what maintenance and survey regime that carries
• Wind propulsion systems bring their own structural loading considerations to the base ship — familiarise yourself with what's specific to your vessel's installation, not generic sailing-ship knowledge
• This is still an emerging technology category — expect maintenance and operational procedures to keep evolving as class experience with real installations grows

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