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DNV: New ammonia bunker fuel chapter added to guidance paper for boxships

DNV explores properties, requirements, bunkering options and implications for ship design in a new chapter added to its Alternative Fuels for Containerships guidance paper.

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Classification society DNV on Thursday (11 January) released a Maritime Impact report on a new chapter on ammonia bunker fuel added to its Alternative Fuels for Containerships guidance paper including bunkering options for ammonia. The following are excerpts from the report:

Ammonia has attracted the shipping industry’s attention as a potential zero-carbon fuel, especially when produced as green ammonia. In a new chapter added to its Alternative Fuels for Containerships guidance paper, DNV explores the properties, requirements and implications for ship design.

In the order books of major shipyards, it is evident that the container shipping industry has already embarked on the path towards sustainability, increasingly embracing green technologies and fuels. “In the current year, all new containerships with a capacity of over 5,000 TEU have been ordered with alternative propulsion systems,” says Jan-Olaf Probst, Business Director Containerships at DNV.

DNV’s guidance paper Alternative Fuels for Containerships has recently been complemented by a new chapter discussing ammonia. “The aim of the guidance paper is to offer shipowners a decision framework for numerous alternative fuels currently under discussion, testing and research,” Probst explains. “Decision makers pondering the most feasible propulsion options for newbuilding programmes or retrofitting projects will find valuable, neutral, fact-based information covering the relevant design, engineering and safety criteria to bear in mind.” 

Ammonia: A versatile industrial product and promising hydrogen carrier

Ammonia (NH3) is an important industrial product and a commonly traded commodity, typically transported in liquefied form at −33°C and atmospheric pressure. Primarily used to make fertilizers and pharmaceuticals or as a refrigerant, it is also considered a key future storage and long-distance transport medium for hydrogen. While the liquefaction, storage and transport of pure hydrogen requires enormous energy input and is technically complex, handling ammonia is comparatively simple and established industrial practice. Furthermore, the energy density of liquefied ammonia is higher than that of liquefied hydrogen, making its transport more efficient.

Green ammonia: Revolutionizing decarbonization in shipping’s energy mix

“Since ammonia combustion emits no carbon compounds, green ammonia is a strong candidate as an alternative, climate-neutral fuel in the energy mix of a future decarbonized shipping fleet,” says Benjamin Scholz, Expert for Alternative Fuel Systems at DNV. “Once production capacities have been scaled up, green ammonia produced using hydrogen from seawater hydrolysis and renewable energy is expected to play a major role in decarbonizing shipping.”

Ammonia can power diesel-cycle two-stroke engines or Otto-cycle four-stroke engines. Due to its poor ignition properties, ammonia requires a pilot fuel, typically diesel or biodiesel. Ammonia-ready dual-fuel ship engines have been introduced recently or are being developed by major manufacturers. Ammonia may also be used in fuel cells.

DNV class rules for ammonia

DNV has issued classification rule updates relating to ammonia that took effect in January 2022 and January 2023. Two new class notations were introduced that are relevant for ammonia as ship fuel. “The Fuel Ready class notation provides shipowners with the option to prepare their newbuilds for later conversion to multiple different alternative fuel options, including ammonia, LNG, LPG and methanol,” Scholz explains. “It comes with several qualifiers specifying mandatory basic as well as optional levels of preparation, relating to structural aspects, engine and machinery, piping and bunkering, and miscellaneous other requirements.”

Furthermore, the Gas Fuelled Ammonia class notation gives owners the option to start building ships for future ammonia propulsion today, setting out the requirements for the ship’s fuel system, fuel bunkering connection and piping through to the fuel consumers. “Through both of these class notations DNV provides a practical path for owners to implement a zero-carbon fuel option for their newbuilds,” says Scholz.

DNV: New ammonia bunker fuel chapter added to guidance paper for boxships

Bunkering options for ammonia

Ammonia may be bunkered ship-to-ship, truck-to-ship or terminal-to-ship. Each method has its advantages and disadvantages. “The ship-to-ship concept is most flexible, being independent of port infrastructure; bunkering from a terminal or jetty at a safe distance from other port installations allows the highest bunkering rates,” Scholz elucidates. Truck-to-ship bunkering is essentially possible anywhere but suitable for smaller amounts of ammonia only. Various ports around the world are currently developing or planning to build ammonia bunkering infrastructure. Both ship-to-ship and terminal-to-ship bunkering will typically be designed to transfer refrigerated, liquefied ammonia.

DNV: New ammonia bunker fuel chapter added to guidance paper for boxships

Minimizing future retrofitting capex

Ammonia is clearly a realistic decarbonization option. “Owners contemplating a future ammonia retrofit of a ship being built today are well advised to choose a design with a high degree of ammonia-readiness along the relevant DNV class notations to minimize future retrofitting capex,” Probst advises. 

The CO2-equivalent emissions of an ammonia-ready vessel, maximizing ammonia use after the retrofit, will be significantly lower than those of a vessel gradually increasing the share of biocarbon-based fuels to align with the decarbonization trajectory because, unlike ammonia, biofuels emit CO2. 

Prices for green ammonia will be key decision factor

The technology for green and blue ammonia exists, but current production volumes are very small. As with all low- or zero-carbon fuels, the availability of sufficient amounts of green ammonia at an affordable price will be a decisive factor for the uptake. Producing green ammonia requires a sufficient supply of green energy while blue ammonia depends on carbon capture and storage capabilities. Blue ammonia could become a feasible transitional fuel with low well-to-wake emissions.

Note: The full DNV Maritime Impact report can be found here

Related: DNV: New chapter on methanol added to “Alternative Fuels for Containerships” document
Related: DNV: Decision and design support for future bunker fuel options for container ships

 

Photo credit: william william on Unsplash / DNV
Published: 11 January, 2024

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Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

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Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Taiwanese shipping firm Yang Ming Marine Transport Corporation (Yang Ming) and South Korean shipbuilder Hanwha Ocean on Wednesday (2 September) signed a shipbuilding contract for six 13,000 TEU class LNG dual-fuel container vessels. 

The contract was signed by Dr. Chuck Tsai, Chairman of Yang Ming, and Mr. Charles Kim, CEO of Hanwha Ocean. The vessels are scheduled for delivery between 2028 and 2029. 

They will complement Yang Ming’s existing fleet of 10,000+ TEU vessels and serve as key vessels on East-West services, with deployment flexibility across trade lanes connecting Asia with the East and West Coasts of North America, South America, and the Mediterranean. 

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

“As Yang Ming transitions toward net-zero emissions, LNG provides a relatively mature and economically viable alternative fuel solution, capable of reducing greenhouse gas emissions by approximately 20%,” the company said. 

“At the same time, ammonia can serve as a carbon-free fuel by utilising converted LNG storage facilities, while offering relatively lower conversion costs and comparatively well-developed supply chains and infrastructure. The Ammonia Fuel Ready design will therefore provide Yang Ming with greater flexibility in responding to increasingly stringent international regulations on greenhouse gas emissions.”

In addition, the vessels will be equipped with Type B LNG fuel tanks with a design pressure of 1.0 bar to enhance the safety and efficiency of LNG operations, together with a range of energy-saving technologies, including Wind Shields, Rudder Bulbs, Pre-Swirl Stators, and Shore Power Systems. Smart ship technologies and cybersecurity protection features will also be incorporated to enhance operational efficiency, safety, and reliability while effectively reducing fuel consumption and greenhouse gas emissions.

Deliveries under Yang Ming’s next-generation fleet optimization plan commenced earlier this year. By 2030, a total of 24 new vessels are expected to enter service. 

This includes 18 LNG dual-fuel vessels—comprising five 15,500 TEU, seven 16,000 TEU, and the six 13,000 TEU vessels under this contract—alongside six 8,000 TEU methanol dual-fuel-ready ships. 

 

Photo credit: Yang Ming Marine Transport
Published: 4 September, 2026

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LR, China’s MARIC unveil tanker concept ready for three future bunker fuels

Both secured AiP for a new 114,000 DWT product and crude oil tanker designed to accommodate future conversion to LNG, methanol or ammonia.

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LR, China’s MARIC unveil tanker concept ready for three future bunker fuels

Lloyd’s Register (LR) and the Marine Design and Research Institute of China (MARIC) on Thursday (3 September) have secured Approval in Principle (AiP) for a new 114,000 DWT product and crude oil tanker designed to accommodate future conversion to LNG, methanol or ammonia.

Announced at SMM 2026, the concept addresses one of the biggest investment challenges facing shipping today: the need to develop vessels and capabilities that can support a range of alternative fuel options and pathways as technologies, infrastructure and regulations evolve.

While LNG is already a mature fuel pathway, methanol and ammonia remain at an earlier stage of development, with questions around global fuel availability, infrastructure development, economics and long-term adoption.

The 114,000 DWT tanker concept has been designed as a product and crude oil carrier that can accommodate future conversion to LNG, methanol or ammonia as technologies, regulations and fuel supply chains mature. By incorporating conversion readiness at the design stage, the concept aims to reduce future retrofit complexity and provide owners with greater confidence when planning long-term fleet investments.

The design concept was reviewed against LR’s July 2026 class rules and regulations, including requirements relating to ships using gases and other low-flashpoint fuels, alongside relevant IACS Common Structural Rules for oil tankers. Final classification and statutory approval remain subject to full compliance with all applicable rules and regulations.

Theo Kourmpelis, Global Business Director for Tankers, Lloyd’s Register, said: “Shipowners are being asked to make major investment decisions today despite continued uncertainty around which fuels will dominate in the decades ahead. Alternative fuel solutions each offer potential pathways to compliance, but fuel infrastructure, regulation and economics continue to evolve at different speeds around the world.

“Designs that preserve flexibility will be critical in helping owners manage risk while preparing for multiple future scenarios.”

Si Nan, Marine & Offshore Marketing Department Vice Director, MARIC, said: “As the industry explores different decarbonisation pathways, shipowners need vessel designs that can adapt alongside technological and regulatory developments. This concept was developed specifically to provide greater fuel flexibility and long-term resilience, allowing owners to respond to changing market requirements without being locked into a single fuel strategy.

“Receiving Approval in Principle from Lloyd’s Register is an important milestone that validates the design concept and supports its future development.”

 

Photo credit: Lloyd’s Register
Published: 4 September, 2026

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DNV: Alternative-fuelled vessel orders hit highest monthly level since October 2024

LNG-fuelled vessels accounted for the vast majority of August activity while the strong summer performance marked a significant acceleration in ordering activity after a relatively slow start to the year.

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DNV: Alternative-fuelled vessel orders hit highest monthly level since October 2024

Latest data from classification society DNV’s Alternative Fuels Insight (AFI) platform alternative-fuelled vessel ordering was strong in August, with 52 new vessels added to the platform.

This is the highest monthly total since October 2024 and follows another active month in July, when 47 vessels were added to the database.

LNG-fuelled vessels accounted for the vast majority of August activity, with 46 orders recorded. The container segment led the way with 30 orders, while the car carrier segment contributed a further 12 LNG-fuelled vessels. In addition, four ethanol-fuelled bulk carriers and two hydrogen-powered bulk carriers were added during the month, as well as one LNG bunker vessel.

The strong summer performance marked a significant acceleration in ordering activity after a relatively slow start to the year. In total, 242 alternative-fuelled vessel orders have been placed in the first eight months of 2026, representing a 27% increase compared with the same period in 2025.

LNG remains the dominant fuel choice, accounting for 63% of all alternative-fuelled vessel orders registered so far this year. Container vessels represent the largest share of these LNG orders (59%), followed by car carriers (30%).

Jason Stefanatos, Global Decarbonization Director at DNV Maritime, said: “The past two months have been particularly strong for alternative-fuelled vessel ordering, with August recording the highest monthly total we’ve seen since October 2024. This has helped lift year-to-date orders to a level well above the same period last year.

“LNG remains the leading fuel choice, driven largely by activity in the container and car carrier segments. These sectors have been among the earliest adopters of alternative fuels, supported by predictable liner operations and increasing demand from cargo owners to reduce emissions across supply chains. 

“For many owners, LNG offers a combination of emissions reductions, fuel availability and future flexibility while the longer-term fuel landscape continues to evolve. 

“At the same time, the latest figures include orders for ethanol- and hydrogen-fuelled vessels, highlighting that owners continue to explore a range of decarbonization pathways. Different segments are making different fuel choices, but the overall level of activity demonstrates continued investment in lower-emission shipping.”

Screenshot 2026 09 04 at 12.29.26 PM Screenshot 2026 09 04 at 12.29.36 PM

 

Photo credit: DNV
Published: 4 September, 2026

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