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DNV rules create new in-operation class framework, enable hydrogen vessels and OCCS

New in-operation class notations seek to bring clarity to the responsibilities of class customers for notations that have a mix of design and operational requirements.

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DNV rules create new in-operation class framework, enable hydrogen vessels and OCCS

Classification society DNV on Tuesday (9 July) published updates to its rules for classification of ships and offshore structures.

In addition to rules supporting the development and deployment of decarbonization technologies, the new in-operation class notations seek to bring clarity to the responsibilities of class customers for notations that have a mix of design and operational requirements.

“One of the most striking aspects of the maritime industry today, is the huge diversity of challenges and opportunities where our customers are looking for classification support,” said Geir Dugstad, DNV Maritime’s Global Technical Director. 

“It’s not just new fuels, but ways for owners and managers to demonstrate their own efficiencies, new vessel types to unlock new markets, through to advanced technologies like on-board carbon capture.”

With the in-operation notations, DNV has developed the first classification framework with dedicated Fleet in service notations that enables owners and operators to showcase how they are differentiating themselves in the market by deploying advanced procedures and reporting processes for greater safety and efficiency. 

The new notation clearly shows the split of responsibilities between the yards for the new building phase and the owners and operators in the operational phase of the vessel.

Designed to unlock innovation in the shipping industry while enhancing safety, the new rules also build on DNV’s leading expertise in maritime decarbonization with the introduction of two new class notations, Gas fuelled hydrogen and OCCS (for carbon capture and storage on board vessels).

While hydrogen is a potential zero-carbon fuel for shipping it is presently not covered by international regulations. The Gas fuelled Hydrogen notation, sets out the requirements for the ship’s fuel system, fuel bunkering connection, and consumers, providing owners a practical path to develop hydrogen fuelled newbuildings.

Onboard carbon capture and storage (OCCS) systems are currently being trialled and offer a way for vessels to reduce emissions and contribute to greater sustainability and regulatory compliance. The OCCS notation offers a framework and requirements for these new systems, including exhaust pre-treatment, absorption, after-treatment systems, liquefaction, CO2 storage, and transfer ashore.

Some of the additional highlights of the rules include:

  • The new BOG (boil-off gas) notation provides requirements for the design and installation of pressure and temperature control systems for liquefied gas tanks,
  • New notation for the transport of live fish creates a new vessel type for this growing industry,
  • New class notation for stability pontoons provides guidance and requirements for pontoons used in heavy lift operations to increase stability,
  • Introduction of a new qualifier “NC” for the notation Hatchcoverless, enables vessels not intending to transport combustible materials to reduce investments in fire detection and fire-fighting equipment,
  • New service notation for Floating spaceports sets requirements for units and installations intended for launch and/or recovery of spacecraft,
  • New qualifier “EV” for the class notation Additional fire safety, specifically developed to target vessels transporting electrical vehicles,
  • Revised rules and standards for diving systems aligned with IMO 2023 diving code.

The publication of the new rules took place on 1 July and the new rules will enter into force on 1 January, 2025. 

Note: To find out more head to https://standards.dnv.com/.

Related: Decarbonizing Asian shipping: The potential of Onboard Carbon Capture

 

Photo credit: DNV
Published: 10 July, 2024

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Alternative Fuels

DNV: How low‑GHG methane can future‑proof LNG-capable vessels

DNV summarises key findings of its Methane in shipping paper, helping shipowners of LNG-capable vessels to meet stricter GHG reduction requirements, and optimise LNG‑based fuel strategies for future compliance.

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DNV: How low‑GHG methane can future‑proof LNG-capable vessels

Classification society DNV on Monday (22 June) published a Maritime Impact article, summarising the key findings of its Methane in shipping paper, helping shipowners of LNG-capable vessels to meet stricter GHG reduction requirements, and optimise LNG‑based fuel strategies for future compliance: 

Excluding LNG carriers, more than 800 ships can run on LNG using mature, proven technology and established infrastructure, with over 600 more on order.

Under the FuelEU Maritime regulation, LNG‑capable ships can remain compliant on fossil LNG until around 2035, depending on engine configuration. Ships fitted with two‑stroke high‑pressure dual‑fuel engines can remain compliant longer than those using four‑stroke low‑pressure dual‑fuel engines, which are more common in cruise ships and RoPax vessels.

Extending LNG compliance with low-GHG options

DNV’s Methane in Shipping white paper indicates that a potential compliance pathway is the use of LNG-compatible low-GHG fuels. LNG ships are compatible with alternatives such as liquefied bio-methane and e-methane. With tightening GHG intensity requirements, these ships are thus well positioned to transition towards lower GHG emission fuels without major retrofits for these alternatives.

t1 ind 636 main drop in fuel options

“Bio-methane and e-methane can achieve very low, or even negative, life cycle emissions depending on how they are produced. LNG-fuelled vessels can progressively decarbonize by blending in or switching to these fuels,” explains Øyvind Sekkesæter, Senior Consultant at DNV and lead author of the paper.

Demand for low-GHG methane will grow with tightening regulations

According to demand projections outlined in the paper, compliance-driven low-GHG methane demand under FuelEU Maritime alone could reach 2–4 million tonnes by 2040, rising to as much as 40–95 million tonnes under the proposed IMO Net Zero Framework’s base target.

t2 ind 636 projected demand for low ghg methane

On the supply side, current production of low-GHG methane is limited, but still higher than many other low-GHG fuel alternatives. Global bio-methane production reached around 7 million tonnes in 2024 and is projected to increase to about 15 million tonnes by 2030. E-methane remains nascent, with only 0.01 million tonnes of operational capacity today, but announced projects could lift this to 0.9 million tonnes by 2030.

t3 ind 636 bio methane production in key markets

While there is significant potential to expand the global supply of low-GHG methane beyond today’s production levels, shipping will compete with other sectors for this supply. Most available supply is already absorbed by power generation and road transport, meaning access for shipping will largely depend on its willingness to pay relative to other users.

Note: The full DNV article can be read here

Related: DNV paper: Existing LNG bunkering infrastructure will ease transition to low‑GHG methane

 

Photo credit: FueLNG and DNV
Published: 23 June, 2026

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Engine

Eight classification societies oversee successful TAT of Everllence ammonia engine

Everllence announced the successful Type Approval Test of its ME-LGIA ammonia-burning engine at its Research Centre Copenhagen.

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Eight classification societies oversee successful TAT of Everllence ammonia engine

Everllence recently announced the successful Type Approval Test (TAT) of its ME-LGIA ammonia-burning engine at its Research Centre Copenhagen (RCC). 

Eight classification societies oversaw the testing that took place from 10 to 12 June, marking the latest phase in the engine’s journey towards its market debut.  

Bjarne Foldager, Head of Two-Stroke Business, Everllence, said: “The TAT is yet another important step as we definitively move from concept development to seagoing engine operation. It confirms the Everllence B&W ME-LGIA as ready for on-board installation and is the last test before actual sea and gas trials. 

“This engine sets new benchmarks in zero-carbon propulsion and digitally connected performance, and has attracted great interest since its development was announced in 2019. It stands testament to Everllence’s unique ability to meet demands and bring innovative fuels to market.”

Everllence officially marketed the ME-LGIA engines at a two-day event in Copenhagen in November 2025. Using the Diesel principle and the well-known, dual-fuel Liquid Gas Injection concept, the engine has a proven track record of several hundred thousand operational hours.

Ole Pyndt Hansen, Senior Vice President, Head of Two-Stroke R&D, Everllence, said: “The TAT is also important in relation to maturing IMO ammonia regulations as it is vital that rules and guidelines are in line with reality to optimise safety onboard vessels. 

“This experience comes from industry and the first ammonia-driven ships, which are expected to operate at sea during 2026, will act as compelling input for the development of these guidelines.”

Everllence also noted that the ammonia TAT marked the end of an era with it being the final TAT at the RCC in Copenhagen before the company moves location to outside the city in late-2027.

 

Photo credit: Everllence
Published: 22 June, 2026

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ECA

DNV: North-east Atlantic joins expanding network of ECAs

DNV highlighted key information on the new North-East Atlantic ECA, which will enter into force on 1 September 2027, following recent amendments MARPOL Annex VI adopted at MEPC 84.

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RESIZED william william on Unsplash

Classification society DNV on Wednesday (17 June) highlighted key information on the new North-East Atlantic ECA, which will enter into force on 1 September 2027 following recent amendments MARPOL Annex VI adopted at MEPC 84, creating a continuous emissions control area across much of the North Atlantic: 

Need to Know

  • The new North-East Atlantic ECA will enter into force on 1 September 2027, creating a continuous emissions control area across much of the North Atlantic.
  • SOx limits (0.10% sulphur) will apply from 1 September 2028.
  • Ships meeting the MARPOL “three‑date” criteria (from 1 January 2027 onward) must comply with Tier III NOx limits for engines above 130 kW when operating in the ECA.

North-East Atlantic ECA

In general, the ECAs are designed to reduce air pollution from NOx, SOx and PM, and play a vital role in protecting sensitive marine environments as well as improving air quality for nearby communities.

The latest addition is the North-East Atlantic ECA, covering the Exclusive Economic Zones (EEZs) and territorial seas of Portugal, Spain, France, Ireland, Iceland, the Faroe Islands, Greenland and mainland UK that are not already included in existing ECAs. The EEZs surrounding Madeira, the Azores and the Canary Islands will be excluded. The precise ECA boundaries are defined by exact coordinates in Appendix VII of the revised MARPOL Annex VI.

Once in force, this designation will create a continuous ECA across the North-East Atlantic, linking the Canadian Arctic, Norwegian Sea, North Sea and Mediterranean Sea ECAs into a single, connected regulatory area.

eca map 2026 1

Application

The North-East Atlantic ECA, as part of the next amendments to Annex VI of MARPOL, will enter into force on 1 September 2027. The effective dates will be as follows:

SOx requirements

The sulphur limits for new North-East Atlantic ECA take effect 12 months after entry into force, in other words on 1 September 2028. From that date onwards, ships must use fuel with a sulphur content of no more than 0.10%.

Alternatively, compliance may be achieved using exhaust gas cleaning systems (EGCS) when operating on higher-sulphur fuels. However, it should be noted that restrictions on the use of open-loop EGCSs are becoming increasingly stringent, particularly in the coastal waters of northern Europe under OSPAR (please refer to our Technical and Regulatory News No. 26/2025), thereby limiting this as a practical compliance option in the region.

Note: The full article by DNV can be read here

 

Photo credit: william william on Unsplash and DNV
Published: 19 June, 2026

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