Anemoi Marine Technologies - Experts & Thought Leaders

Anemoi Marine Technologies, a pioneer in wind-assisted propulsion technology, has announced independently verified results of its Rotor Sail system following nearly a year of rigorous testing. In a Statement of Fact, Lloyd’s Register Advisory confirmed the methodology Anemoi used for calculating fuel and emissions savings from the three 24-metres-high Rotor Sails installed on TR Lady - a Kamsarmax bulk carrier owned in funds managed by Tufton Investment Management Ltd (“Tufton”) and chartered by Cargill.  The extensive dataset establishes a reliable and repeatable benchmark for wind-assisted propulsion performance under a broad range of real-world conditions. Fuel and emissions savings The average net savings across this period, calculated from the verified performance model During the testing period, TR Lady sailed the Indian Ocean, South Atlantic, North and South Pacific, Southern Ocean and rounded both the Cape of Good Hope and Cape Horn, along with some of the busiest shipping routes, including the Strait of Malacca. Data from eight consecutive Laden and Ballast legs were analysed to provide a long-term average of the fuel and emissions savings. The average net savings across this period, calculated from the verified performance model, were 1.9 tonnes of fuel per day and 7.0 tonnes of CO2 per day (well-to-wake). This equates to an average of 9.1% net propulsion fuel and emissions savings. Net propulsion fuel reduction The achieved average savings align closely with Anemoi’s predicted 10% savings, making this a very positive result. Additionally, since TR Lady does not follow a fixed route, the results varied from voyage to voyage depending on the route taken and the wind conditions encountered. For example, on a 22-day voyage across the North Pacific, average route savings of 21% net propulsion fuel reduction were calculated from the verified performance model. That said, it is especially important to Anemoi to share the full, transparent picture in the first instance, rather than focusing solely on one particularly favourable route, to provide a more relevant measure of long-term performance. Reliable method for Rotor Sail performance The achieved average savings align closely with Anemoi’s predicted 10% savings, making this a very positive result Lloyd’s Register Advisory confirmed that the findings of this study validate Anemoi’s approach as a reliable method for calculating Rotor Sail performance. The Statement of Fact concluded that “there is close agreement between the predicted thrust coefficient trends and the measured values”.  Dr Dogan Uzun, Ship Performance Consultant at Lloyd’s Register Advisory and project manager of the assessment, said, “We have independently verified Anemoi’s methodology to calculate thrust power and predict fuel consumption, confirming its accuracy when ship-specific coefficients are correctly applied and kept up to date." Rotor sail-equipped vessels Uzun added: "Our assessment, drawing on high-frequency operational data and CFD analyses for rotor sail-equipped vessels, highlights the value of detailed, vessel-specific modelling." "The findings show that wind-assisted propulsion, when supported by robust data and transparent methods, can significantly reduce uncertainty and contribute meaningfully to emissions reduction in commercial shipping.” Anemoi’s standard products Anemoi has also confirmed that testing is currently underway on several vessel installations TR Lady, an 82k DWT Kamsarmax, was installed in June 2023 with three Anemoi Rotor Sails, 5m in diameter and 24m in height - a shorter height and a lower aspect ratio compared to Anemoi’s standard products to suit air draft requirements. Anemoi has also confirmed that testing is currently underway on several vessel installations featuring its larger Rotor Sails, measuring 35m in height, which, thanks to their higher aspect ratios, are expected to achieve even higher performance results. Lloyd’s Register Advisory’s rigorous and transparent approach Clare Urmston, CEO of Anemoi Marine Technologies, said, “This independent verification is a crucial step in building trust across the industry. Lloyd’s Register Advisory’s rigorous and transparent approach gives shipowners and operators the confidence that our technology delivers measured fuel savings and emissions reductions in line with expectations." "At Anemoi, we believe that credibility is earned through data, openness and accountability, and this verification underpins our commitment to setting a new standard as emerging technologies like wind propulsion pave the way in clean maritime innovation.” Latest fuel consumption calculations "Verifying the performance of Rotor Sails has been a key objective of this project for Tufton. The latest fuel consumption calculations, following the methodology independently verified by Lloyd’s Register Advisory, closely match our original expectations." "We are excited by the results, which not only confirm the technology’s effectiveness but also the strong operational and environmental benefits we anticipated," shared Nicolas Tirogalas, Chief Investment Officer and President of Tufton. Ship performance of technologies Anemoi is one of the few in the industry backed by such an extensive knowledge base Chris Hughes, Decarbonisation Specialist of Cargill, said, “Building up an accurate understanding of the real-world, on-ship performance of technologies is a key piece in the wind assist propulsion puzzle."  "By combining the data from more than 167 rotor on/off tests that were conducted by the TR Lady, together with the independent verification from LR, Anemoi installed confidence in the accuracy of their analysis. We have already used the results of this study to fine-tune our weather routing digital twins for TR Lady; and it will also help inform future decisions on deploying wind assist across our fleet.” Real-world performance data from vessels With over a decade of continuous operational data gathered from installations and test sites since 2013, Anemoi is one of few in the industry backed by such an extensive knowledge base.  Drawing on this expertise, Anemoi is committed to transparently sharing real-world performance data from vessels equipped with its Rotor Sail technology.

Anemoi Marine Technologies Ltd, an industry pioneer in wind-assisted propulsion systems, has announced that it is collaborating with Hafnia Limited, Guangzhou Shipyard International (GSI), and DNV to develop the integration design of Rotor Sails suitable for installation on 50,000 dwt Medium-Range (MR) tanker vessels. The companies signed a Joint Development Project (JDP) in April 2025 to develop a new generation of efficient and environmentally friendly Rotor Sail vessel designs to increase the efficiency of MR tankers within the wider global fleet. How Rotor Sails can improve Anemoi and Hafnia will undertake several engineering studies to establish specifications As part of the project, Anemoi and Hafnia will undertake several engineering studies to establish specifications related to how Rotor Sails can be safely and efficiently installed on the deck of MR tankers, alongside additional electrical and control system layouts for these vessels. In addition, the studies will include calculations to examine how Rotor Sails can improve the Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing Ship Index (EEXI) values of existing and future MR tankers. Rotor Sail’s design integration GSI will apply its naval architecture and marine engineering principles to develop essential technical documentation for the new Rotor Sail’s design integration, while DNV will undertake an Approval in Principle (AiP) assessment to ensure that the design is feasible and verifies that no significant obstacles exist to prevent the design from being realised based on current and foreseeable regulatory and class requirements. “Participating in this joint development project allows us to collaborate with industry partners to unlock the full potential of Rotor Sails on MR Tankers. It supports Hafnia’s decarbonisation strategy to assess and embrace the potential of innovative technologies to improve fuel efficiency and reduce vessel emissions,” shared Jesper Kristiansen, Hafnia’s General Manager Technical. Vessel energy efficiency DNV will undertake an Approval in Principle (AiP) assessment to ensure that the design is feasible “WAPS, like Rotor Sails, are spreading throughout the industry, enabled by new materials, data and software, and evolving rules and regulations. Across all segments, we still have room to improve vessel energy efficiency and WAPS have emerged as one of the most attractive tools for shipping to make immediate, impactful gains in this area." "DNV is very pleased to be part of this forward-looking group, and build on a cooperation with Anemoi, Hafnia and GSI that is driving shipping’s journey towards a more sustainable future,” said Mr Shao Guang Chi, Station Manager of Guangzhou Station at DNV Maritime. Integrating Rotor Sails into MR tankers “With new regulations driving the need for lower emissions, the time is right to adopt highly efficient ship designs." "Integrating Rotor Sails into MR tankers is a necessary step, and together with our partners, we’re committed to delivering vessels that meet both environmental and commercial demands,” said Deputy Chief Engineer, Huang Jun of Guangzhou Shipyard International (GSI). Tanker sector for novel technology Rotor Sails, also known as ‘Flettner Rotors’, are vertical cylinders that harness the renewable power “There is growing interest within the tanker sector for novel technology that can help reduce the carbon footprint of their vessels and increase their value, particularly as the MR tanker fleet is expected to grow in the coming years." "Our partnership with Hafnia, alongside GSI and DNV, will ensure a new generation of MR tankers that utilises Rotor Sails to improve their efficiency and sustainability credentials hits the water in the not-too-distant future,” said Nick Contopoulos, Chief Production and Partnerships Officer of Anemoi. Reduce the carbon emissions and fuel consumption Rotor Sails, also known as ‘Flettner Rotors’, are vertical cylinders that harness the renewable power of the wind to provide additional forward thrust and improve the energy efficiency of the vessel. This energy-saving technology is increasingly being sought after by ship owners and operators as a cost-effective and immediate solution to reduce the carbon emissions and fuel consumption of their vessels, as well as helping meet international emission reduction targets.

Anemoi Marine Technologies, a globally renowned provider of innovative Rotor Sail technology solutions, has announced the appointment of Tejal Davda as Finance Director. Tejal brings a wealth of experience in maritime finance and leadership, further strengthening Anemoi’s executive team, which is now 33% female. Extensive industry experience Tejal holds a first-class degree in Economics and Business Finance and is a chartered accountant Tejal holds a first-class degree in Economics and Business Finance and is a chartered accountant, having trained and qualified with a Top 10 Accountancy & Audit Practice. She specialised in audit and advisory services for the shipping sector, rising to Audit Director. Tejal Davda subsequently joined a UK-based ship-owner and operator, where she led the financial reporting, financial planning and analysis, and commercial finance divisions during a period of rapid growth. Her expertise also includes raising finance, S&P analysis, and tax planning and strategy. Anemoi’s growth plans In her new role, Tejal will be responsible for establishing a financial strategy to support Anemoi’s growth plans and collaborating with the leadership team to ensure financial insights guide strategic decisions.  Tejal Davda said, "I am excited to join a company that values collaboration, innovation, excellence and is committed to sustainability. I look forward to contributing towards Anemoi’s plan for decarbonisation and play a part in shaping a greener, more sustainable future for the maritime sector." "My main focus will be to establish a financial strategy that supports our growth plans and collaborating with the leadership team to ensure financial insights guide strategic decisions," adds Tejal Davda. Anemoi’s commitment to diversity and inclusion Tejal’s work marks a milestone in Anemoi’s duty to diversity and inclusion, with the executive team Tejal’s appointment also marks a milestone in Anemoi’s commitment to diversity and inclusion, with the executive team now comprising 33% female pioneers. "I am incredibly proud to join a Company and an executive team that is inclusive and diverse, where a variety of perspectives and experiences are valued. Anemoi has created an environment that fosters equality allowing us to bring together different viewpoints to drive innovation and better address, the challenges of today’s evolving industry. I'm thrilled to be part of the team and work alongside such talented and diverse colleagues," adds Tejal Davda. Tejal's leadership team Anemoi’s CEO, Clare Urmston, commented, "I’m thrilled to welcome Tejal to our leadership team as Finance Director. She brings not only a wealth of experience from the maritime industry and sharp financial expertise, but also a collaborative spirit and drive which aligns well with Anemoi’s values and ambitions." Clare Urmston adds, "I look forward to working closely with her as we shape the next chapter of Anemoi’s journey together."