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ABS publishes guidance for design, construction and operation of ammonia-fuelled vessels

Guide sets out classification design criteria for the arrangements, construction, installation and survey of machinery, equipment and systems for vessels.

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The American Bureau of Shipping (ABS) on Tuesday (21 September) said it has issued a detailed guidance on design, construction and operation of ammonia-fuelled vessels.

The Guide for Ammonia-Fueled Vessels sets out Classification design criteria for the arrangements, construction, installation and survey of machinery, equipment and systems for vessels operating with ammonia as fuel to minimize risks to the vessel, crew and the environment.

“The industry is looking at ammonia as one of the pathways towards the decarbonisation goals for beyond 2030. It is a fuel with high potential as a solution for shipping companies looking to decarbonize their operations. It offers shipowners and operators a zero-carbon tank-to-wake emissions footprint but is not without challenges,” says Georgios Plevrakis, ABS Director, Global Sustainability.

“As the industry begins to seriously evaluate ammonia-fueled operations, now is the right time for ABS to provide support and guidance to help navigate the risks and understand the safety requirements.”

“Ammonia is a zero-carbon fuel that the global market is preparing for, and ABS is involved in ammonia fuel projects with leading industry partners all over the world. We understand the potential it offers shipowners and operators as well as the unique safety challenges it introduces to the design, construction and operation of vessels using it for propulsion or power generation,” Patrick Ryan, ABS Senior Vice President, Global Engineering and Technology.

“ABS is leading the way in understanding the design and operation of ammonia-fueled vessels and this Guide underscores our commitment to supporting its safe adoption by the industry.”

The Guide is supported by notations recognizing where a vessel is arranged to burn ammonia for propulsion or auxiliary purposes and is designed, constructed and tested in accordance with the requirements of the Guide. 

The vessel LFFS notation will be issued in tandem with suffixes denoting dual-fuel propulsion (DFD) or reliquefaction systems (RELIQ) and with the remote monitoring notations (ACC, ACCU or ABCU), depending on the individual vessel arrangement.

Note: The ABS Guide for Ammonia-Fueled Vessels is available to download here.

 

Photo credit: Cameron Venti from Unsplash
Published: 22 September, 2021

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Decarbonisation

DNV: New research shows how regulation could reshape shipping

DNV summarizes findings of its latest Maritime Forecast to 2050, exploring how future scenarios could affect marine fuel demand, technology uptake, fleet investments, and competitiveness.

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Classification society DNV on Thursday (24 September) released a new article summarizing findings of its latest Maritime Forecast to 2050, exploring how future scenarios could affect marine fuel demand, technology uptake, fleet investments, and competitiveness: 

Shipping’s energy transition has entered a new phase. The technology options are increasingly well understood. LNG, methanol, biofuels, wind-assisted propulsion, and emerging ammonia solutions are no longer concepts but commercial realities. Yet despite this progress, shipowners face a more difficult challenge than ever: making investment decisions amid unprecedented regulatory uncertainty.

The 2026 edition of DNV’s Maritime Forecast to 2050 argues that uncertainty itself is now becoming one of the most important drivers of fleet strategy. 

“Decisions taken today on vessel design, retrofits, and fuel capability will determine competitiveness for decades, while the outcome of ongoing regulatory negotiations could significantly reshape the economics of shipping’s energy transition,” says Øyvind Sekkesæter, Senior Consultant at DNV and lead author of this year’s report. “Maritime Forecast to 2050 aims to assist that decision-making with our latest core insights and case study examples.”

Four regulatory scenarios could shape shipping very differently

This year’s Maritime Forecast takes a scenario-based approach, presenting four possible regulatory futures for shipping. These range from the full adoption of IMO’s initially approved Net-Zero Framework (NZF) to its rejection and prolonged political gridlock, while also exploring several intermediate outcomes, including a delayed or revised NZF and scenarios where regional regulations play a more prominent role in driving decarbonization. Rather than predicting which outcome is most likely, the scenarios illustrate how different regulatory futures could affect fuel demand, energy-efficiency uptake, investment signals, and fleet competitiveness.

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Stronger global regulation accelerates demand for low-GHG fuels and increases the attractiveness of energy-efficiency measures, while the absence of such regulation slows market development. The result is a transition whose pace may vary significantly depending on future policy decisions.

“For shipowners, this means the challenge is no longer identifying a single fuel pathway that fits the operational profile of their fleet. Instead, it is preparing fleets that remain competitive across multiple possible futures,” Sekkesæter concludes.

Tapping the fleet’s efficiency potential

Fully realizing the fleet’s energy-saving potential requires improvements not only to newbuilds but also to existing ships through retrofits.

Installing energy-saving devices during scheduled dry-docking can be a highly cost-effective decarbonization strategy, as illustrated by the Maritime Forecast’s case study of a hypothetical 15-year-old 5,000 TEU containership (built in 2013).

This envisages USD 2.35 million being invested to retrofit the ship with hydrodynamic enhancements including a bow retrofit, propeller upgrade, and a propeller boss cap fin.

The vessel can achieve estimated fuel savings of around 16% under the modelling assumptions. Evaluating the investment under three price scenarios for low sulphur heavy fuel oil (LSHFO) results in payback periods from 1.4 years to 4.2 years.

Note: The full Maritime Impact article by DNV can be found here. 

 

Photo credit: DNV
Published: 25 September, 2026

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Alternative Fuels

Höegh Autoliners orders six more ammonia, methanol-ready Aurora class PCTCs

Höegh Autoliner inked a contract with China Merchants Group for six additional Aurora class PCTCs, which will be built by China Merchants Heavy Industry (Jiangsu) and delivered between 2029 and 2031.

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Höegh Autoliners orders six more ammonia, methanol-ready Aurora class PCTCs

Höegh Autoliners on Tuesday (22 September) said it has formally signed a contract with China Merchants Group (CMG) for six additional Aurora class pure car and truck carriers (PCTCs). 

The contract was signed during a high-level meeting in Naples attended by senior representatives from both companies, including Miao Jianmin, Chairman of China Merchants Group. Chair of Höegh Autoliners, Leif O. Høegh, and Andreas Enger, CEO of Höegh Autoliners.

The six additional dual-fuel LNG and zero-carbon-ready vessels will be built by China Merchants Heavy Industry (Jiangsu) Co., Ltd. (CMHI) and delivered between 2029 and 2031. 

With 18 Aurora Class vessels in the programme, Höegh Autoliners is building the fleet needed for a zero- emission future and setting the pace for the transformation of deep-sea shipping.

The Aurora Class vessels can carry up to 9,100 cars and reduce carbon emissions per transported car by up to 58 per cent compared with conventional PCTCs. They have DNV’s ammonia-ready and methanol-ready notations and are designed to be converted to run on future zero-carbon fuels.

Leif O. Høegh, Chair of the Board of Directors of Höegh Autoliners, said: “For nearly 100 years, we have developed, adapted and led the way through major changes in shipping. It is in our DNA to keep moving and challenge what is possible. This signing continues that story. We are investing in the vessels that will define our fleet for decades and help move our industry towards zero emissions.”

Andreas Enger, CEO of Höegh Autoliners, said: “This is not just another vessel-building agreement. It is a statement about the future of deep-sea shipping and the role we intend to play in shaping it. The Aurora Class is at the heart of our fleet renewal and our path to a sustainable future. By expanding the programme to 18 vessels, we are securing efficient, flexible and future-ready capacity while setting the pace towards zero-emission operations.”

Miao Jianmin, Chairman of China Merchants Group, said: “Höegh Autoliners is a pioneer in international shipping and will celebrate its 100th anniversary next year. We would like to offer our congratulations in advance! Over the past century, Höegh Autoliners has achieved remarkable development and has grown into a leading company in the global RoRo shipping sector. We truly admire what you have accomplished.”

 

Photo credit: Höegh Autoliners
Published: 24 September, 2026

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Newbuilding

CLdN orders two LNG dual-fuel RoRo vessels from HD Hyundai Heavy Industries

New vessels will be built with space reserved for the future addition of larger electric shaft generators and batteries as the technology matures.

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CLdN orders two LNG dual-fuel RoRo vessels from HD Hyundai Heavy Industries

Europe’s multimodal logistics providers CLdN on Tuesday (22 September) announced it has placed an order for two new 6,700 lane-metre RoRo vessels with HD Hyundai Heavy Industries (HD Hyundai HI).

Construction of the new vessels is set to begin towards the beginning of 2028, with delivery scheduled for mid-2029. 

“The ships will be the 15th and 16th vessels ordered by CLdN from the South Korean shipbuilder over the past 10 years,” the company said on its website. 

The new vessels will be dual-fuel capable, able to run on standard marine diesel or LNG, and will be built with space reserved for the future addition of larger electric shaft generators and batteries as the technology matures.

While fuel consumption per vessel is expected to be similar to that of CLdN’s existing 5,000 lane-metre class ships, the increased cargo capacity of the new vessels is expected to deliver 30 to 40% better fuel efficiency per tonne-kilometre of cargo carried making the vessels the most fuel-efficient RoRo ships in the world.

The new vessels are designed with one additional deck and increased ground space compared to CLdN’s existing 5,000 lane-metre class ships, with a configuration specifically adapted for trailer cargo. 

“The addition of these vessels to CLdN’s fleet will ensure customers benefit from an even broader range of shipping options via CLdN’s extensive fleet of RoRo and container vessels,” the company said. 

 

Photo credit: CLdN
Published: 24 September, 2026

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