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Sustainable Shipping Initiative: Decarbonising shipping- sustainability

Shipping industry needs to end its reliance on fossil fuels and shift to zero and low carbon bunker fuels, alongside technical and operational energy efficiency measures.

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Secretariat

Andreea Miu and Elizabeth Petit Gonzalez from the Secretariat of the Sustainable Shipping Initiative (SSI) recently discussed the sustainability of shipping decarbonisation in an article.

Decarbonising shipping isn’t simply about replacing engines. The complete fuel supply chain needs to be considered too. 

There is no one-size-fits-all solution for shipping’s decarbonisation, but in order to set shipping on a path to fully decarbonise by 2050, the industry needs to end its reliance on fossil fuels and shift to zero and low carbon fuels, alongside technical and operational energy efficiency measures, improving resource use, and implementing alternative propulsion methods.

In its Fourth GHG study, the International Maritime Organization predicts that over 60% of emissions reduction efforts by 2050 will be achieved by zero and low carbon marine fuels such as electrofuels (e.g., ammonia and hydrogen) and biomass derived fuels (e.g., biodiesel and bio methane).

But what makes a fuel zero and low carbon?

A zero and low carbon fuel is generally associated with zero or low emissions at point of combustion onboard a vessel. When discussing the lifecycle of a fuel, emissions resulting from onboard combustion are referred to as ‘tank to wake’ emissions. 

Many fuels under consideration for shipping’s decarbonisation can be considered as having zero or low emissions when only this stage of the fuel’s lifecycle is taken into consideration. However, in order to fully understand if a fuel is zero and low emissions a broader approach that looks at the whole fuel value chain (well-to-wake) is needed.

Well-to-wake includes all the operations that a fuel has gone through before being applied onboard (well-to-tank) as well as the combustion or propulsion process (tank-to-wake). For biomass derived fuels this includes the collection of residues or the cultivation of biomass. 

For electrofuels it includes the production of electricity, which is in turn used to produce hydrogen for the fuel. For all fuel types, it includes production through various means, any conversion process (e.g. gas to liquid), transportation between facilities, storage and distribution to the point of bunkering, and finally, the combustion or propulsion process on-board the ship.

All lifecycle stages prior to bunkering create emissions and impact the world around them. Therefore, in order for a fuel to be sustainable and zero or low carbon, it must take into account impacts and emissions across the full well-to-wake lifecycle.

At the same time, low GHGs and carbon intensity only cover a fraction of the sustainability issues that should be addressed. A sustainable fuel must be environmentally, socially and economically sustainable, and underpinned by the continuous improvement of its sustainability performance.

The Sustainable Shipping Initiative (SSI) has been working to develop a set of sustainability criteria that can be applied to all zero and low carbon fuels alongside members including LR, Maersk, The China Navigation Company, and WWF, as well as academic partner Copenhagen Business School (CBS) Maritime.

The work has identified a set of fifteen issues that encompass environmental, social, and economic factors, with corresponding principles and criteria, to provide clarity around the sustainability concerns of zero and low carbon fuels, and to ensure that sustainability is addressed alongside availability, cost, and technical feasibility in decarbonisation discussions.

• Lifecycle Short lived Climate Forcers (SLFC) emissions
• Air quality
• Carbon source
• Electricity / Energy source
• Water
• Sustainable resource use
• Land use
• Ecological impacts
• Economic well being
• Social equity
• Social, labour, and human rights
• Food security
• Health, safety, and security
• Continuous improvement

Understanding sustainability issues from a lifecycle perspective allows for informed decision-making concerning value chain risks and helps direct choices for investment, purchase and consumption. 

Eventually, sustainability certification of zero and low carbon marine fuels can provide assurance to the organisations investing in zero and low carbon marine fuel options, promoting trust across the value chain, mitigating risk, and aiding in the selection of sustainable zero and low carbon options for shipping.

 

Photo credit: Maksym Kaharlytskyi from Unsplash
Published: 10 November, 2021

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Shipping Corridor

Industry partners launch Brazil-Belgium e-fuel green shipping corridor initiative

A new consortium facilitated by the Global Maritime Forum and RMI will work to establish a green shipping corridor between the Port of Açu in Brazil and the Port of Antwerp-Bruges in Belgium.

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A new consortium facilitated by the Global Maritime Forum and RMI will work to establish a green shipping corridor between the Port of Açu in Brazil and the Port of Antwerp-Bruges in Belgium, according to Global Maritime Forum on Thursday (4 June). 

In addition to the port teams on both ends of the corridor, the consortium includes HIF Global, Fuella, NYK Line, Höegh Autoliners, and Wallenius Wilhelmsen. 

The consortium will assess infrastructure, vessels, and business models to create a roadmap for transporting zero-carbon fuels produced in Açu, such as e-ammonia or e-methanol. The transport itself would also be powered by the same zero- or near-zero-emission fuels.

“We’re thrilled to be working with these partners to take these important steps towards Brazil’s e-fuel production and bunkering opportunity, whilst supporting the growing demand for e-fuels in Europe,” said Eleanor Wells, a senior project manager at the Global Maritime Forum.

The new consortium builds on a pre-feasibility study developed by RMI and the Global Maritime Forum in November 2025. 

The study highlighted the competitive projected costs of e-fuel produced in Açu, due to Brazilian policies supportive of green hydrogen production, the country’s largely renewable electricity grid, its abundance of renewable energy sources, and a relatively low cost of capital. A 2024 report from the same two organisations, Oceans of Opportunity, identified the Port of Açu as a high-potential e-fuel export hub.

Green shipping corridors are dedicated trade routes where the feasibility of zero-emission shipping is catalysed by public and private action. These routes are seen as central to delivering on the shipping industry’s goal of having zero-emission fuels account for 5% of all fuels by 2030. 

While green corridors have rapidly expanded in popularity worldwide, and a handful of initiatives have now reached the realisation stage, the most recent edition of the Annual Progress Report on Green Shipping Corridors warned that progress is being stalled by a ‘feasibility wall’ created by the cost gap between conventional and zero-emission fuels.

The Global Maritime Forum and RMI will continue to facilitate the realisation of the Açu-Antwerp green corridor, with work already moving at pace to progress beyond pre-feasibility and develop a feasibility analysis for the corridor. The feasibility analysis is expected to be published by the end of the year, with the consortium meeting regularly in the meantime.

 

Photo credit: william william on Unsplash
Published: 5 June, 2026

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Emissions reporting

StormGeo and OceanScore link emissions data, compliance workflows

Cooperation combines StormGeo’s expertise in operational vessel and emissions data with OceanScore’s expertise in emissions compliance workflows across EU ETS, FuelEU Maritime and UK ETS requirements.

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StormGeo and OceanScore link emissions data, compliance workflows

Weather intelligence and decision support solutions provider StormGeo and Hamburg-based technology platform OceanScore on Wednesday (3 June) said they have deepened their ongoing cooperation through the signing of a collaboration agreement during Posidonia 2026 in Athens on 2 June.

The cooperation combines StormGeo’s expertise in operational vessel and emissions data with OceanScore’s expertise in emissions compliance workflows across EU ETS, FuelEU Maritime and upcoming UK ETS requirements.

Together, the companies aim to help shipping companies seamlessly navigate increasing regulatory complexity more efficiently — from emissions reporting and data validation to compliance exposure management, pooling and financial settlement.

As emissions regulation becomes an increasingly important part of commercial shipping operations, the need for reliable operational data and streamlined compliance processes continues to grow. The cooperation between StormGeo and OceanScore is designed to support shipping companies with more connected, transparent and actionable processes across operational and commercial teams.

“From the outside, companies like StormGeo and OceanScore may sometimes be perceived as competitors because both operate around emissions and compliance workflows,” said Albrecht Grell, Managing Director at OceanScore. 

“But in reality, the industry increasingly needs both perspectives working together: trusted operational emissions data on one side and commercial compliance execution on the other. Our cooperation reflects that shipping companies are no longer looking for isolated solutions — they need connected processes, automated across different systems and reliable decision-making throughout the full compliance chain.”

By connecting validated operational emissions data with commercial compliance management, the cooperation supports workflows across:

  • emissions reporting and validation 
  • compliance management across EU ETS, FuelEU Maritime and upcoming UK ETS requirements
  • exposure visibility and cost transparency
  • pooling, settlement and financial processes 

The cooperation also aims to improve commercial transparency and coordination across operational and commercial stakeholders.

“StormGeo plays a central role in helping shipping companies turn operational vessel and emissions data into trusted, decision-ready insights,” said Espen Martinsen, Chief Commercial Officer at StormGeo. 

“As emissions regulations become more complex, this data is essential for transparent and efficient compliance management. By working with OceanScore, we can help customers connect StormGeo’s validated operational data with commercial compliance processes, creating a more integrated and practical approach to emissions management.”

The signing ceremony took place at the StormGeo booth during Posidonia 2026 in Athens and was attended by representatives from both companies.

Both companies expect the cooperation to continue evolving alongside upcoming regulatory developments, including FuelEU Maritime, EU ETS, the upcoming UK ETS and future emissions-related frameworks affecting global shipping.

 

Photo credit: StormGeo
Published: 4 June, 2026

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Methanol

Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Following “Seaspan Yangtze”, the remaining vessels planned for retrofit under the methanol retrofit programme are “Seaspan Amazon”, “Seaspan Ganges”, “Seaspan Thames”, and “Seaspan Zambezi”.

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Seaspan and Hapag-Lloyd complete first of five methanol vessel retrofit

Seaspan Corporation (Seaspan) and Hapag-Lloyd on Wednesday (3 June) announced the successful completion of the first of the five vessel conversions under their methanol retrofit programme with the delivery of Seaspan Yangtze.

From the early SAVER (Seaspan Action for Vessel Energy Reduction) programme to today’s CleanBlue initiative, Seaspan has committed over USD 230 USD million across 86 vessels, executing more than 550 efficiency and retrofit projects.

Following Seaspan Yangtze, the remaining vessels planned for retrofit under the programme are Seaspan Amazon, Seaspan Ganges, Seaspan Thames, and Seaspan Zambezi. Each retrofit is expected to reduce well-to-wake CO₂e emissions by approximately 30,000 to 50,000 metric tonnes per vessel annually when operating on low-carbon methanol, while also extending vessel lifespan and enhancing fuel flexibility.

“Decarbonisation is not just about building the fleet of tomorrow, it is also about unlocking the full potential of the fleet we have today. Retrofitting and upgrades on existing fleets play a practical, immediate, and economical role in accelerating shipping’s decarbonization journey,” said Bing Chen, Chairman, President and CEO of Seaspan. 

“Project SAVER CleanBlue highlights Seaspan’s strong customer partnerships, deep technical expertise, and unique platform integrated with JV partners, such as WattSpan Maritime Technology, in executing complex and large-scale retrofit projects.”

“The successful conversion of the Seaspan Yangtze together with the planned retrofit of its four sister vessels is another important step on our ambitious path towards net-zero fleet operations by 2045,” said Silke Lehmköster, Managing Director, Fleet, Hapag-Lloyd. 

“Together with Seaspan, we are demonstrating that retrofitting existing vessels for low-carbon methanol can be a practical way to reduce emissions in shipping.”

 

Photo credit: Seaspan
Published: 4 June, 2026

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