DNV has released the latest edition of its “Classification Rules for Ships and Offshore Structures.” The update introduces several new class notations to support carbon capture and storage (CCS), including the world’s first notation—CO₂ RECOND—covering the pre-processing of CO₂ before injection into wells or other receiving points.
2025 will see multiple large-scale industrial carbon storage and injection projects transition from blueprint to reality, marking a significant breakthrough in emerging sectors of shipping and offshore industries. To support this ongoing innovation, DNV has introduced the new CO₂ RECOND notation for vessels equipped with CO₂ processing systems before injection into seabed reservoirs or other endpoints. Additionally, two new restricted notations have been added to the existing offshore rules: DRILL-CO₂ (for CO₂ injection well drilling systems) and Abate-CCW (for wellstream carbon capture production units).
Geir Dugstad, Global Technology Director at DNV Maritime, stated: “As a leader in classification, our mission is to drive industry innovation rather than follow it. The updated CCS rules are building a robust framework of standards to support clients in this emerging field. At the same time, we continue to expand options for clients to adopt new fuels and improve energy efficiency, whether now or in the future. At DNV, we are committed to helping clients realize their visions—turning blueprints into reality through innovation while establishing market trust through rigorous, independent standards.”
The shipping and offshore industries’ growing focus on sustainability is reflected in updated requirements for alternative fuels and the new “Fuel Ready – Hydrogen” notation, designed to prepare vessels for future hydrogen fuel adoption. With the surge in wind-assisted propulsion systems (WAPS), the new “WAPS Ready” notation allows shipowners to plan for future installations.
For many companies, balancing innovation with commercial success on a sustainable basis remains a challenge. However, the UN Sustainable Development Goals (SDGs) offer forward-thinking organizations an opportunity to demonstrate their commitment to addressing global challenges. This is particularly relevant in the offshore sector, prompting DNV to introduce the new “Offshore Sustainability” notation to certify compliance with UN SDG standards.
Other key updates include:
• A new T-LOG restricted notation for offshore service vessels, enhancing reporting requirements for anchor operations
• Revised rules for waterjet propulsion systems
• Updated propeller assessment methods and clarified thruster requirements
• Enhanced Walk2Work notation system, including an in-service status notation
• A new operational “Clean” notation clarifying responsibilities for shipowners and managers
• Introduction of the Mooring Integrity Management (MIM) notation
The new rules were published on July 1, 2025, and will take effect on January 1, 2026.
