The call, up front. While the industry argues about deep-sea green fuels for 2050, the compliance bite is landing first on the short-sea fleet: the regional ferries and coastal freighters under 5,000 GT (gross tonnage, a measure of ship size) that move much of intra-EU cargo. FuelEU Maritime (an EU law capping greenhouse gases from ship fuel) and the EU ETS (the EU’s carbon-pricing scheme) already price carbon for ships above 5,000 GT; emissions monitoring now reaches down to 400 GT, and Brussels must decide by the end of 2026 whether to pull the smaller class into the ETS too. The shore-power (plugging into grid electricity at the dock instead of running the engines) and retrofit (refitting the existing ship) options they would need barely exist. The gap is a financeable retrofit path for the sub-5,000 GT class.
The gap
The regulation is calibrated to large tonnage (the bigger ships) today, but the net is closing fast on the small class, and the options to comply don’t exist for it. Deep-sea fuels are where the attention and capital sit; the bite is arriving on vessels too small to retrofit economically.
Don't chase the 2050 deep-sea fuel. Underwrite (finance) the retrofit-as-a-service package (shore-power coupling plus propulsion) that takes a sub-5,000 GT vessel from non-compliant to financeable before the 2030 step.
Source: European Commission: FuelEU Maritime; DNV
Required GHG-intensity (greenhouse-gas emissions per unit of energy) reduction versus the 2020 fleet-average baseline of 91.16 gCO₂e/MJ (FuelEU Maritime, in force 1 Jan 2025). The penalty is €2,400 per tonne of VLSFO-equivalent (very low sulphur fuel oil, the standard marine fuel) energy deficit, multiplied for repeat non-compliance. EU ETS surrender on shipping emissions reaches 100% in 2026.
Source: GAPTIQ engine: challenge decomposition
- Jan 2024EU ETS extended to shipping: ships ≥5,000 GT surrender allowances (hand in paid carbon permits) on 40% of CO₂
- Jan 2025FuelEU applies in full; ETS rises to 70%; emissions monitoring extended down to 400 GT
- Jan 2026EU ETS reaches 100%; methane and N₂O (nitrous oxide) added to scope
- Dec 2026Commission must report on pulling 400–5,000 GT ships into the ETS: the small class is next
Source: European Commission Climate Action; EMSA; SAFETY4SEA
The move
The first mover isn’t a shipbuilder. It’s whoever underwrites a standardized retrofit-and-shore-power package for the sub-5,000 GT class: financeable before the 2030 berth mandate and the 2026 ETS decision force a fire sale of non-compliant tonnage. With only ~4% of the global fleet shore-power-ready and retrofits running €0.8–1.5m a vessel, the financing template is the product, not the hardware.
Source: First report on the implementation of the ETS extension to maritime transport (COM(2025) 110), European Commission, March 2025. Surfaced by the GAPTIQ engine.
