Future Cleantech Architects Shipping Factsheet Compares Maritime Decarbonization Options

Shipping decarbonization presents policymakers with a bewildering range of choices. Batteries, biofuels, methanol, ammonia, hydrogen, wind assistance, shore power, nuclear propulsion and onboard carbon capture all compete for attention, despite serving very different vessel types and operating requirements. Future Cleantech Architects (FCA), a German nonprofit think tank that evaluates climate technologies and translates technical research into guidance for policymakers, has done a good job of bringing those differences into focus. Its October 2026 shipping factsheet is part of The Basics & The Gaps series. Three visually rich pages cover the industry’s emissions, fuels, technologies and infrastructure challenges with considerably more care than many much longer reports.

FCA commissioned TFIE Strategy to conduct a paid, independent peer review of a July draft. The version reviewed was already well researched and thoughtfully designed. The feedback mostly involved the way readers could interpret comparisons drawn from different system boundaries, along with the prominence given to technologies at very different stages of commercial development. FCA’s published edition incorporates substantial improvements in several of those areas. Its analysts deserve the credit for the final editorial choices.

The marine fuels table is particularly useful. LNG and LPG are identified as fossil fuels, while lifecycle emissions, local pollution, costs, technology readiness and toxicity receive more consistent treatment. These distinctions matter when methane leakage, synthetic fuel production pathways and the source of electricity can materially change the emissions associated with a particular fuel. Policymakers considering infrastructure subsidies need to understand those differences before treating a nominally alternative fuel as a climate solution.

I also welcomed the stronger treatment of batteries. FCA uses a 1,100 TEU container ship operating between Spain and North Africa to explore propulsion options beyond the familiar short ferry route. Charging infrastructure, modular batteries, port calls and vessel operations all influence the practical opportunity. Ammonia toxicity, nuclear propulsion and onboard carbon capture also receive more appropriate qualifications. The result is a factsheet that takes engineering possibilities seriously while acknowledging the considerable work required to turn them into commercial systems.

FCA’s accompanying website raises an important question that deserves even greater prominence in future work: how much fuel will the fleet actually need? Today’s vessels are overwhelmingly dependent on oil-derived fuels, but the future mix of cargoes, ships and routes will change. Efficiency improvements and electrification will also affect the amount of liquid fuel that must be supplied. Calculating the alternative fuels required to replace today’s consumption provides a useful reference, although it is a different exercise from forecasting the market that will exist after those changes.

That distinction can affect decisions about fuel-production capacity, port infrastructure and public subsidies. In my longer TFIE Strategy Briefing assessment, I examine how FCA’s figures should be interpreted, what my maritime transition scenarios suggest about future fuel requirements, and how evidence of orders and technical capability differs from demonstrated emissions reductions.