Vessel CO₂ Emissions Ranking
Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.
Bulk Carrier
Container Ship
Oil Tanker
Chemical Tanker
Gas Carrier
LNG Carrier
General Cargo
Vehicle Carrier
Refrigerated Cargo
Ro-Ro Cargo
Bulk Carrier
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Container Ship
Ranked by AER (CO₂/dwt·nm) — sized in TEU
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Oil Tanker
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Chemical Tanker
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Gas Carrier
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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LNG Carrier
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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General Cargo
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Vehicle Carrier
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Refrigerated Cargo
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Ro-Ro Cargo
Ranked by AER (CO₂/dwt·nm) — sized in DWT
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Source: EU MRV (Regulation (EU) 2015/757), the EU system for Monitoring, Reporting and Verification of CO₂ emissions from ships calling at EEA ports. Operational intensity reflects real reported voyages, not just design efficiency.