Lloyd’s Register (LR) has announced an update to its Rules and Regulations for the Classification of Ships, introducing new technical notations that formalise standards for wind propulsion systems and ergonomic design.
The changes, which will be consolidated into the Rules from 1 January 2026, establish classification requirements for wind-assisted propulsion systems and ergonomic designs. This update, published as Notice No. 5 to LR’s July 2025 rule sets, introduces two new notations for wind-assisted propulsion systems (WAPS) and WAPS* and the EASE notation for ergonomic access and human-centric design. The existing RIGGING notation definition is also modified.
The new WAPS and WAPS* notations (upon owners' request) have been established for systems such as soft and rigid wingsails, Flettner rotors, suction wings and kites. They enable shipowners to classify retrofitted or hybrid installations, including those not originally classed by LR. By providing a structured framework for assessing the safety and integrity of these systems, WAPS and WAPS* support investment decisions and operational assurance across a wide range of vessel types.
In parallel, LR has also introduced the EASE notation, which introduces formalised standards for ergonomic access and human-centric design. This move allows shipowners to demonstrate their commitment to crew welfare through certified layouts that improve safety and usability in critical areas, such as bridges and machinery spaces.
The update to the existing RIGGING and RIGGING* notations apply to vessels using wind propulsion as the sole means of propulsion. It establishes classification requirements for systems such as aft rigged vessels, DynaRig, AeroRig and traditional square-rigged vessels, ensuring these technologies meet rigorous safety and performance standards. This notation is particularly relevant for newbuilds designed around wind as the primary energy source, offering a formal pathway for classification and regulatory compliance.
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Dr Yikun Wang, Senior Structures Specialist, Rule Development, Lloyd’s Register, said: “These updates are a direct response to the industry’s need for clarity and confidence when investing in emerging technologies. By codifying standards for wind propulsion and ergonomics, we’re helping shipowners future-proof their fleets while supporting decarbonisation and safety goals.”
Tom Wolodarsky, Senior Surveyor and Lead Specialist WASP, Marine & Offshore, North Europe, LR, added: “The new rules and notices set out technical requirements to support shipowners, designers and regulators in implementing wind propulsion and human-centric solutions. By introducing these standards and guidance notes, LR aims to continue facilitate the maritime industry in adopting new sustainable technologies safely and effectively.”
The rule updates also include a forward-looking “Statement of Future Requirements”, outlining anticipated changes from the International Association of Classification Societies (IACS) and the International Maritime Organization (IMO). This provides designers and operators with the regulatory certainty needed to plan for future compliance and innovation. LR will publish details on future requirements, such as those related to IACS UR M85 and M86, when available.
The new notations are now available via the latest edition of LR’s Rules and Regulations.
