Our purpose is to promote rapid and large-scale uptake of Zero Emissions Ship Technology (ZEST). Zero Emissions means zero GHG emissions at point of use on the vessel with minimal upstream impacts. By combining zero emission technologies, we achieve zero emissions at a shipboard level faster. With today’s technologies we can achieve fully zero emissions now, particularly on smaller return to base vessels, and drastically reduce emissions on larger ocean going vessels with more complicated operational profiles.
“ZESTAs is like a lego set where no matter how you put together the pieces they always add up to zero.”
Madadh MacLaine, Secretary General
Combined Technologies
Batteries
Marine batteries are containers of one or more cells in which chemical energy is converted into electricity.
Modularity means that energy capacity can range from tens of kWh to multiple MWh, while power delivery is instant. Because the electricity is used directly with no conversion, batteries have the greatest energy efficiency of any fuel or energy storage system.
Hydrogen
Hydrogen when used as a fuel in hydrogen fuel cells provides efficient, silent, zero emission power generation.
Fuel cells convert hydrogen and oxygen into electricity, heat and pure water via an electrochemical energy conversion process, producing no NOx, SOx or CO2 emissions at all. Therefore, hydrogen fuel cells can be used on board vessels…
Wind
Wind propulsion is experiencing exponential growth in merchant shipping, including ocean-going vessels of > 100,000 dwt.
Wind propulsion technologies harness free and renewable energy from the wind to propel vessels. When used to assist other methods of propulsion, as is often the case with retrofits, wind propulsion can provide ~ 20% of propulsion…
Our mission is to:
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Promote the interests of the Zero Emissions Ship Technology Industry
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Inform regulators, policymakers, and the shipping industry about available zero emissions ship technologies (ZEST)
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Influence regulators and policymakers at national and international levels to introduce legislation that necessitates the uptake of ZEST
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Create a collaboration platform for ZEST providers
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Prevent catastrophic climate impacts by assisting commercial shipping to reduce emissions on a steep trajectory in line with 1.5 degrees
THE UN IPCC WARNS WE HAVE ONLY 6 YEARS TO PREVENT CLIMATE CHANGE CATASTROPHE
IMO PPR 13 – Sub-Committee on Pollution Prevention and Response
IMO PPR 13 – Sub-Committee on Pollution Prevention and Response
Zero Emissions Ship Technology Association Secretary General Madadh MacLaine will attend the 13th session of the Sub-Committee on Pollution Prevention and Response (PPR 13), held from 9–13 February at the
SMART ENERGY WEEK
SMART ENERGY WEEK
📍 Tokyo, Japan🗓 SMART ENERGY WEEK🤝 ZESTAs Participation Zero Emissions Ship Technology Association Secretary General Madadh MacLaine will be attending SMART ENERGY WEEK at Tokyo Big Sight. SMART ENERGY WEEK
Zero Emission Ferries in APAC
Zero Emission Ferries in APAC
The transition to zero-emission maritime transport is accelerating across Asia-Pacific, with ferry operators, ports, OEMs, technology providers, and policymakers working to deploy scalable solutions. Global Mass Transit is organising the
Asia Pacific Maritime (APM) 2026
Asia Pacific Maritime (APM) 2026
Asia Pacific Maritime (APM) is Asia’s premier exhibition and conference for innovation across Shipbuilding & Marine, Workboat, Offshore, Port Technology, and Electric & Hybrid Marine. Held biennially in Singapore, APM
BlueWeek – Marseille-France
BlueWeek – Marseille-France
BlueWeek brings together thought leaders, innovators, and practitioners from across the oceans, energy and shipping communities to explore sustainable pathways for the future of maritime transport and the blue economy.
NGOs urge IMO: “Dilution is not a solution” – choose onboard retention & port offload for ammonia ship waste
Opportunity Green, Environmental Defense Fund, One Planet Port, Pacific Environment, Clean Shipping Coalition, Seas at Risk, and ZESTAs call for a precautionary approach to managing toxic ammonia effluent from ammonia-fueled ships 13 February 2026 (London, UK) - A...
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