American Bureau of Shipping (ABS) - Experts & Thought Leaders

“The IMO really has to step up now if we are to deliver on the pace and scale of the change required. A lot of this comes down to the question of how we address the significant price differential between fossil and alternative fuels. The IMO holds the keys to all of this, and the time for action is now. Whether we as an industry can make 2050 rests largely with the IMO and how it performs in the coming months.” That was the message to the industry from ABS Chairman and CEO Christopher J. Wiernicki speaking at the Capital Link Singapore Maritime Forum. Net zero by 2050 Wiernicki said the present trajectory would see the industry fall well short of its 2050 targets: “The headline is that something is really going to have to bend the curve if we want to make net zero by 2050 a reality, because we are currently way off the pace and scale of change that we will need. Fortunately, our destiny remains in our hands: we are not done yet." "But success will now surely be a function of what the IMO does next. We need clarity and consistency and a level playing field for the whole industry. Right now, the industry is divided, and there is no clear way forward.” Adoption of alternate fuels IMO to show leadership in supporting the adoption of alternative fuels Wiernicki said the industry is looking to the IMO to show leadership in supporting adoption of alternate fuels, a necessary and key step before new nuclear technology becomes available and appropriately regulated, a function of governments. “We know the bookends. It starts with oil and gas, with LNG and carbon capture. The long term increasingly favours nuclear if we want to make net zero by 2050 a reality. The key question for all of us today is what is going to drive the story in the middle?” he said. Success in the decarbonisation of shipping “The mid game looks like a mix of biofuels, methanol and ammonia, and it is the IMO that is going to have to drive this." "While it is true that success in the decarbonisation of shipping will be a team sport, we will certainly need our captain to play a decisive role. Now is the time for the IMO to show strength and leadership.”

ABS and Pacific International Lines (PIL) have signed a Memorandum of Understanding (MOU) at Singapore Maritime Week that establishes a framework to collaborate on projects related to maritime technology, sustainability and safety management systems. “To make meaningful progress in this era of rapid change, we need strategic industry collaborations like this one with PIL. We look forward to capitalising on our unique strengths and capabilities in maritime compliance and cutting-edge technologies to advance safety, emissions reduction and operational efficiency,” said Christopher J. Wiernicki, ABS Chairman and CEO. PIL’s vessel construction As part of the overall strategic partnership, the MOU allows ABS and PIL to exchange technical knowledge and jointly explore innovative maritime technologies. The ABS Technology and Singapore Innovation Research Centre will provide modelling and simulation to support PIL’s new vessel constructions and existing vessel retrofits. ABS Sustainability specialists will work with PIL to develop an energy-efficiency strategy, including techno-economic studies, and the implementation of practical decarbonisation measures that enhance environmental performance. ABS Port State Control improvement ABS provides guidance for Port State Control improvement and aligning safety standards Safety is another key focus area of the agreement, with ABS providing guidance for Port State Control improvement and aligning safety standards with global best practices. Lars Kastrup, CEO of PIL, said: “This MOU reinforces our commitment and supports our plans to future-proof our fleet. Partnering with ABS allows us to leverage world-class expertise to drive innovation, advance decarbonisation, and enhance safety management. This long-term collaboration is a testament to our dedication to driving progress, ensuring that we stay ahead of regulatory changes while maintaining operational excellence and environmental responsibility.” Maritime and decarbonisation technologies The MOU will enable PIL to advance the resilience and competitiveness of its fleet by exploring innovative solutions, fostering technical knowledge exchange, and assessing emerging maritime and decarbonisation technologies. PIL has recently taken delivery of four new state-of-the-art vessels and has another 14 on order that can benefit from this partnership. ABS is guiding the industry with pioneering research and insights to support technology advancement in the marine and offshore industries.

ABS and Monohakobi Technology Institute (MTI) have successfully completed a landmark collaboration advancing the development of fully autonomous vessels. The Action Planning and Execution System (APExS-auto) maritime autonomy framework from MTI received approval in principle from ABS. The project utilised the System-Theoretic Process Analysis (STPA) method, an innovative hazard analysis technique. System-Theoretic Process Analysis (STPA) method “ABS is leading the industry in forward-thinking approaches to support our clients. The STPA technique is useful for autonomous vessel applications and for complex systems such as those installed on board fully electric vessels and other highly sophisticated ship types,” said Gareth Burton, ABS Senior Vice President, Global Engineering. “MTI have established a framework for lifecycle management of autonomous navigation systems. The framework is crafted to be flexible, adapting to any necessary operational and design changes. This approval from ABS provides a solid basis for future installations,” said Hideyuki Ando, Director of MTI. APExS-auto operational framework The APExS-auto operational framework for fully autonomous vessels was developed by MTI The APExS-auto operational framework for fully autonomous vessels was developed by MTI, Nippon Yusen Kabushiki Kaisha and Japan Marine Science Inc. as part of the pioneering MEGURI 2040 fully autonomous ship program. ABS evaluated the APExS-auto framework in accordance with the ABS Requirements for Autonomous and Remote-Control Functions. Partnership between ABS and MTI The collaboration between ABS and MTI arrives at a crucial juncture as the International Maritime Organization (IMO) progresses with the development of regulations for Maritime Autonomous Surface Ships (MASS). As the maritime industry increasingly integrates advanced systems in the design of autonomous functions, the successful application of STPA within the APExS-auto framework marks a significant advancement in realizing the potential of autonomous shipping. ABS’ advanced remote-control and autonomous technology ABS is collaborating with the industry, government regulators and stakeholders in the design and implementation of the world’s most advanced remote-control and autonomous technology.

Ammonia is gaining traction as a future fuel in the maritime industry, primarily due to its potential to significantly reduce greenhouse gas emissions. A key driver for ammonia's interest is that it can be carbon-free when combusted, which aligns with the maritime industry's increasing pressure to meet emissions regulations. However, most ammonia production currently relies on fossil fuels. Transitioning to "green ammonia" production is crucial for sustainability. If "green ammonia" is produced using renewable energy sources, it offers a pathway to near-zero emissions shipping. Safety measures and regulations Ammonia’s volumetric energy density – higher than hydrogen – makes it more practical for onboard storage. However, ammonia is toxic, which requires stringent safety measures and regulations for handling and storage. The combustion of ammonia can produce nitrous oxide (N2O), a potent greenhouse gas. Therefore, mitigation technologies are needed. Building the necessary infrastructure for ammonia bunkering and supply will be a significant undertaking. Developing guidelines for safe use Ammonia is poised to play a significant role in the maritime industry's transition to a future The International Maritime Organization (IMO) is developing guidelines for the safe use of ammonia as a marine fuel. Increasing numbers of companies are investing in the development of ammonia-fueled vessels and technologies.   European Union (EU) legislation, such as the EU Emissions Trading System (ETS) and the FuelEU initiative to support decarbonisation, are pushing the maritime industry towards the use of alternative fuels, which is increasing the potential of ammonia. While challenges remain, ammonia is poised to play a significant role in the maritime industry's transition to a more sustainable future. Ongoing research and development   Ongoing research and development are focused on improving safety, reducing emissions, and scaling up production. In essence, ammonia offers a promising pathway for the maritime industry to reduce its carbon footprint, but its widespread adoption depends on overcoming technical and logistical challenges. Working toward the future of ammonia Progress is already happening as the maritime industry works toward a future that includes the use of ammonia as a fuel. For example, one project underway aims to be a pioneer in establishing a comprehensive and competitive supply chain to provide clean ammonia ship-to-ship bunkering in the U.S. West Coast. Progress is already occurring as the maritime industry works toward a future A feasibility study is being conducted at the Port of Oakland, Benicia, and nearby major ports on the U.S. West Coast. A Memorandum of Understanding (MOU) between American Bureau of Shipping, CALAMCO, Fleet Management Limited, Sumitomo Corp. and TOTE Services LLC is jointly conducting the feasibility study. "We are proud to share our industry-pioneering expertise in ammonia as a marine fuel to support this study on the U.S. West Coast,” said Panos Koutsourakis, Vice President of Global Sustainability at the American Bureau of Shipping. “Our expertise in developing safety guidelines will support the consortium to address the ammonia-specific set of safety and technology challenges.” More global ammonia developments In another development, three LPG/ammonia carrier ships have been ordered at the South Korean shipyard HD Hyundai Heavy Industries (HD HHI). Danish investment fund European Maritime Finance (EMF) and international shipping company Atlas Maritime have confirmed the order. HD HHI’s parent company, HD Korea Shipbuilding & Offshore Engineering (HD KSOE), revealed the order for $372 million in March 2024. The three 88,000 cubic-metre LPG dual-fuel carriers, capable of carrying and running on ammonia, are scheduled for delivery in December 2027. The vessels will be named EMF Viking I, II, and III. Also, Lloyd’s Register (LR) and Guangzhou Shipyard International have signed a joint development project to design the world’s largest very large ammonia carrier (VLAC). The design of the 100,000-cubic-metre vessel has been assessed in line with LR’s Structural Design Assessment and prescriptive analysis. The gas carrier will have an independent IMO Type B tank for safe carriage of the chemical. Zero-emissions operations The cargo ship, which will be 7,800 dwt, is designed to transport timber from Norway to Europe “As major economies look to co-fire ammonia in their coal power stations to reduce the CO2 footprint of their national energy mix, shipping will play a key role in distributing clean hydrogen-based commodities such as ammonia, thereby supporting nations to meet their Paris Agreement commitments," says LR's Chief Executive Nick Brown. Furthermore, a partnership of companies from Norway has ordered a pioneering short-sea cargo ship that will advance the industry’s ability to provide zero-emissions operations. The cargo ship, which will be 7,800 dwt, is designed to transport timber from Norway to Europe and will be the first to operate on ammonia and electricity. Amogy’s ammonia-to-electrical power system A start-up company focusing on ammonia-to-power technology, Amogy, demonstrated the first tugboat powered by its cracking technology just short of the fourth anniversary of the company’s launch. The trip of a 67-year-old tug along a tributary of New York State’s Hudson River is part of the company’s works to develop and commercialise its technology to decarbonise the most difficult industries. Amogy’s ammonia-to-electrical power system splits, or “cracks,” liquid ammonia into its base elements of hydrogen and nitrogen. The hydrogen is then funnelled into a fuel cell, generating the power for the vessel. Research points to the risks of ammonia The chemical, made of hydrogen and nitrogen, can also be burned as a zero-carbon fuel Today and in the future, ammonia, a main component of many fertilisers, can play a key role in a carbon-free fuel system as a convenient way to transport and store clean hydrogen. The chemical, made of hydrogen and nitrogen, can also be burned as a zero-carbon fuel. However, new research led by Princeton University scientists illustrates that even though it may not be a source of carbon pollution, ammonia's widespread use in the energy sector could pose a grave risk to the nitrogen cycle and climate without proper engineering precautions. Use of ammonia U.S. National Science Foundation (NSF)-supported research found that a mismanaged ammonia economy could ramp up emissions of nitrous oxide, a long-lived greenhouse gas around 300 times more potent than carbon dioxide and a major contributor to the thinning of the stratospheric ozone layer. The use of ammonia could lead to substantial emissions of nitrogen oxides, a class of pollutants that contribute to the formation of smog and acid rain. And it could directly leak fugitive ammonia emissions into the environment, forming air pollutants, impacting water quality and stressing ecosystems by disturbing the global nitrogen cycle. Negative impacts of an ammonia economy The researchers found that the potential negative impacts of an ammonia economy "We have great hope that ingenuity and engineering can help reduce our use of carbon-based energy sources," said Richard Yuretich, a program director in NSF's Division of Earth Sciences. "But caution is advised because of unintended environmental spillover effects that may result from new technology." The researchers found that the potential negative impacts of an ammonia economy may be minimised with proactive engineering practices, but the possibility of risks should not be taken lightly. Addressing an inconvenient reality As interest in hydrogen as a zero-carbon fuel has grown, so too has an inconvenient reality: It is notoriously difficult to store and transport over long distances, requiring storage at either temperatures below -253 degrees Celsius or at pressures as high as 700 times atmospheric pressure. Ammonia, on the other hand, is much easier to liquify, transport and store, and capable of being moved around similarly to tanks of propane. Nonetheless, the cycle of nitrogen is delicately balanced in Earth's critical zone, and extensive research must be undertaken to investigate the repercussions of ammonia combustion and to develop new methods to minimise the risks. Challenges of ammonia as a maritime fuel Here's a breakdown of the key challenges of using ammonia for maritime fuel:   Toxicity and Safety: For human health, ammonia is highly toxic, posing a serious risk to human health through inhalation or skin contact. This necessitates stringent safety protocols, advanced leak detection systems, and thorough crew training. Relating to the environment, leaks can also harm aquatic ecosystems, requiring robust containment and mitigation measures. Combustion Challenges: Ammonia's combustion characteristics are less favourable than traditional fuels, requiring modifications to engine design and potentially the use of pilot fuels. Emissions: Combustion can produce nitrogen oxides (NOx) and nitrous oxide (N2O), both of which are harmful pollutants. Mitigating these emissions is crucial. "Ammonia slip" is also a concern, in which unburnt ammonia is released. Infrastructure and Supply Chain: Establishing a global network of ammonia bunkering infrastructure is a massive undertaking, requiring significant investment and coordination. Scaling up "green ammonia" production, using renewable energy, is essential for its sustainability. This requires a robust and reliable supply chain. Storage: Ammonia has specific storage requirements, and onboard storage systems must be designed for safety and efficiency. International Standards Needed: Consistent and comprehensive international regulations and standards are needed for the safe handling, transportation, and use of ammonia as a marine fuel. While the IMO is developing Guidelines, complete and ratified rules are still needed. Economic challenges: "Green ammonia" is currently more expensive than traditional fuels, although costs are expected to decrease as production scales up. Significant investments are needed in research, development, and infrastructure to make ammonia a viable maritime fuel. Also, dedicated ammonia-fueled engines are still under heavy development, and do not have widespread availability. The path to commercialisation Overcoming the variety of technical and other obstacles will require collaboration among governments, industry stakeholders, and research institutions. The timeline for ammonia deployment in maritime applications is actively unfolding, with key milestones happening now and soon. 2025 marks the first trials of two-stroke, ammonia dual-fuel engines on oceangoing ships. Engine manufacturers like MAN Energy Solutions and WinGD are progressing with their engine development, with initial deliveries soon. These pilot projects are crucial for gathering real-world data and building confidence in ammonia as a marine fuel.   Development of comprehensive regulations As the maritime industry faces, ammonia is hoped to play a growing role in the fuel mix Gradual commercialisation will follow in the late-2020s as the technology matures and the infrastructure develops. The focus will be on refining engine technology, improving safety protocols, and establishing bunkering facilities in key ports. Wider adoption will likely follow in the 2030s, depending on factors such as the cost of green ammonia, the development of comprehensive regulations, and the expansion of the global supply chain. As the maritime industry faces increasing pressure to decarbonise, ammonia is expected to play a growing role in the fuel mix. Future of maritime It's likely that a combination of ammonia and other alternative fuels and technologies will be used in the future of maritime. Alternatives include methanol, liquid natural gas (LNG), hydrogen, biofuels, electric propulsion, and even nuclear power.  Ammonia is a strong contender, bit it faces stiff competition from other promising technologies. The maritime industry's transition to a sustainable future will likely involve a diverse mix of fuel solutions.

More than almost any trend, decarbonisation is driving the future of maritime. That reality alone makes decarbonisation the perfect topic for our first-ever Expert Panel Roundtable column. Traditional maritime fuels, like heavy fuel oil, release harmful pollutants that contribute to air pollution and have adverse health effects. We have to do better, and discussions in the maritime industry centre on which combination of alternative fuels and other technologies can solve the shorter- and longer-term challenges of decarbonisation. For an update on the various approaches, we asked our Expert Panel Roundtable: What are the latest maritime technology trends in decarbonisation?

Demand for ammonia is being transformed by the energy transition. Until recently used as an input for fertiliser and chemical products, new markets for green and blue ammonia are emerging, replacing fossil energy in power generation, steel production and marine fuel. Today some 200m tonnes per annum of ammonia is produced worldwide with 20m tpa transported in LPG carriers. The scale of the emerging and potential demand will see these figures rise; how quickly this can be achieved will determine its take-up as a shipping fuel. New or evolving technology The interest in ammonia stems both from its ‘zero emissions’ when used as fuel and because its production isn’t dependent on biogenic carbon sources. As the global economy transitions away from fossil-based fuels, biogenic carbon – from captured CO2, electrolysis and even waste sources – will be subject to increasing competition from other consumers. Shipyards around the world are considering the advantages that operating on ammonia may provide Accordingly, owners, operators, designers, and shipyards around the world are considering the advantages that operating on ammonia may provide. However, when considering any new or evolving technology, it is important to have a clear understanding of not only the benefits, but the challenges that may be involved. Challenges of ammonia bunkering Biogenic carbon will increasingly replace fossil-based carbon in many of the products in use today in industry and consumer goods. Competition from the energy and aviation sectors will inevitably lead to increased prices but production capacity will need to come from industrial sources rather than biomass harvested for this purpose. ABS has produced a Technical and Operational Advisory on Ammonia Bunkering in response to the need for better understanding by members of the maritime industry. It is intended to provide guidance on the technical and operational challenges of ammonia bunkering, both from the bunker vessel’s perspective (or land-side source) and from the receiving vessel’s perspective. Managing emissions Particular attention needs to be paid to the potential presence of ammonia slip, N2O or NOx emissions The carbon emissions from the combustion of ammonia are associated with and dependent on the type and amount of pilot fuel used. The use of biofuel as pilot fuel may further reduce the emissions. In addition, the emissions of sulphur dioxide, heavy metals, hydrocarbons, and polycyclic aromatic hydrocarbons (PAHs) drop to zero (or near zero, depending on the pilot fuel used); and particulate matters (PM) are also substantially reduced compared to conventional fossil fuels. However, particular attention needs to be paid to the potential presence of ammonia slip, N2O or NOx emissions, due to the imperfect combustion of ammonia and the use of pilot fuels. These emissions will need to be kept as low as possible by further adjustment and development of the engine technology or using an on-board exhaust gas treatment technology. Currently, hydrogen for ammonia production is typically produced by means of steam methane reforming (SMR) or autothermal reforming (ATR) of natural gas (grey ammonia). If the CO2 emissions from the process of converting natural gas are captured and stored, the ammonia is typically referred to as ‘blue’. Production of blue ammonia Moreover, the production of blue ammonia retains a dependency on fossil fuels. Therefore, ‘green ammonia’, which is produced from hydrogen made from renewable energy sources (green hydrogen), is generally considered to be the end-solution for decarbonisation which leads to a sustainable fuel cycle, while blue ammonia is seen to have an intermediate role. The potential well-to-wake GHG emissions of green ammonia are estimated to be around 91% lower than for grey ammonia, and 85% lower than HFO and MGO. The grey ammonia production network is already well established and global, ensuring easier accessibility across major ports worldwide. Infrastructure and regulation Specific requirements for ammonia bunkering are under discussion by all marine stakeholders This will help green ammonia become readily available for bunkering and distribution once sufficient production and infrastructure are in place. On the other hand, when compared with liquid hydrogen or LNG which can be stored at temperatures of −253°C and −162°C, respectively, liquid ammonia can be stored and transported at −33°C near atmospheric pressure, which allows for easier adaptation of existing fuel infrastructure on ships and at ports. While specific requirements for ammonia bunkering are under discussion by all marine stakeholders, the requirements for shipping ammonia as cargo, including loading and unloading operations, have been established in the marine industry and are covered by the IMO International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) and incorporated in the ABS Rules for Building and Classing Marine Vessels Part 5C Chapter 8 “Vessels Intended to Carry Liquefied Gases in Bulk”.  For the use of ammonia as bunker fuel, all segments of the marine industry (including IMO, Class Societies, Port Authorities, and industry agencies) are working to develop requirements and procedures specific to ammonia bunkering operations. Refer to the section “Regulatory Organisation” of this Advisory for the current activities of each marine industry segment.  Bunkering Options Ship-to-ship bunkering is the most popular mode for transferring fuel to ocean-going vessels There are three main methods of bunkering ammonia to ships. Truck-to-ship is the process of transferring ammonia from trucks or truck trailers to a receiving vessel using ammonia as fuel. Typically, the tanks on the truck are pressurised and store ammonia at ambient temperature. To increase bunker capacity and transfer rates, a manifold may be used to connect several trucks simultaneously to supply the receiving vessel. Truck-to-ship transfer operations may provide greater operational flexibility, but at the same time could induce operational restrictions and limitations by the local Authority. Ship-to-ship bunkering is the most popular mode for transferring fuel to ocean-going vessels, such as container ships, tankers, and bulk carriers, which require large fuel capacities and greater quantities of fuel to be bunkered. Terminal-to-ship bunkering transfers ammonia from an ammonia storage terminal pipeline connected to receiving vessels via a hose assembly or loading arm. Ammonia Safety Ammonia is toxic and reacts violently and explosively with oxidising gases such as chlorine, bromine, acids, and other halogens. When ammonia is inhaled, swallowed or absorbed via skin contact, it reacts with water in the body, producing ammonium hydroxide. Due to these toxicity issues, ammonia is classified as a hazardous substance, with the level and time of exposure being controlled by several national standards.  The level of competency needed for each task depends on the role and duties of the individual A combination of both training and operational experience is key to developing the required competencies for ammonia bunkering operations. The level of competency needed for each task depends on the role and responsibilities of the individual. Therefore, the training may vary from person to person. Seafarers on board ships using ammonia fuel should have completed training to attain the abilities that are appropriate to the capacity to be filled, and duties and responsibilities to be taken up. The master, officers, ratings and other personnel on ships using ammonia fuel should be trained and qualified in accordance with regulation V/3 of the STCW Convention and section A-V/3 of the STCW Code, taking into account the specific hazards of ammonia used as fuel. Ship-specific training  Ship-specific training is to be reviewed and approved by governing regulatory authorities. The IGF Code provides detailed training requirements for ships that use gases or other low-flashpoint fuels. Ships under the jurisdiction of flag administrations signatory to SOLAS should ensure that seafarers should have the specified certificates of proficiency and the administration shall approve courses and issue endorsements indicating completion of the qualification. All crew must be provided with and be made aware of the emergency procedures and must be trained in any roles and responsibilities they may have. Training, drills and exercises to prepare crews for emergencies are to be provided. Lessons learned from past operations should be incorporated to improve emergency procedures. Procedures should cover all scenarios specific to the ship, type of incident, equipment, and associated areas.