The Lloyd’s Register Maritime Decarbonisation Hub has joined over 50 leaders in the shipping industry to sign a Call to Action at COP 29, focusing on accelerating the adoption of zero-emission fuels. The Call to Action, organized by RMI, UN Climate Change High-Level Champions, UCL Energy Institute, and the United Nations Foundation, aims to drive investment in decarbonisation through scalable zero-emission fuel pathways. The joint statement calls for faster action to increase the uptake of zero and near-zero emissions fuels, invest in zero-emission vessels, and develop global green hydrogen infrastructure, ensuring no country is left behind. The maritime industry is preparing for the Marine Environment Protection Committee’s 2025 meeting to set global regulatory architecture for achieving net-zero emissions by 2050. Recommendations include clear mid-term measures, balanced revenue distribution, and advancing practical use of scalable zero-emission fuels. Global green hydrogen production must double by 2030 to align with a 1.5°C pathway, requiring coordinated action across the supply chain. Collaboration among green hydrogen producers, shipping actors, and policymakers is vital for a successful clean energy transition. The Green Hydrogen Catapult and ports have shown support for the initiative, committing to investing in hydrogen-derived fuel infrastructure and safety projects.