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Most Emission-Efficient Container Ships

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.

Segment rank (2025)
#1,868 of 2,221 container ships
CO₂ intensity
15.5 g CO₂/dwt·nm
vs segment average (9.9)
+56% higher
E
Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo
Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates
Size (TEU)
All sizes < 3,000 TEU 3k – 8k TEU 8k – 14k TEU > 14,000 TEU
Year
2025 2024
2,267
vessels ranked
2.88
greenest (g CO₂/t·nm)
8.38
segment median
# Vessel Size (TEU) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
1851 EA BARU
IMO 9295517
 1,335 TEU 2005
15.2
E
1852 GRANDE COSTA D'AVORIO
IMO 9465382
 1,318 TEU 2011
15.3
E
1853 MSC WAVE F
IMO 9232462
 962 TEU 2001
15.3
E
1854 ARIES J
IMO 9514767
 786 TEU 2011
15.3
E
1855 GRANDE ARGENTINA
IMO 9198135
 1,302 TEU 2001
15.3
E
1856 XPRESS NETRAVATI
IMO 9348194
 1,706 TEU 2006
15.3
E
1857 GRANDE BENIN
IMO 9343170
 800 TEU 2009
15.3
E
1858 GFS SAPPHIRE
IMO 9330927
 1,440 TEU 2007
15.3
E
1859 EF ELDRA
IMO 9470882
 1,338 TEU 2010
15.3
E
1860 GRANDE SENEGAL
IMO 9377470
 800 TEU 2010
15.3
E
1861 MSC IZMIR F
IMO 9127021
 1,122 TEU 1996
15.3
E
1862 HELLE RITSCHER
IMO 9333371
 1,856 TEU 2006
15.3
E
1863 RAPHAELA
IMO 9365831
 1,849 TEU 2008
15.4
E
1864 CMA CGM FORT STE MARIE
IMO 9261906
 2,260 TEU 2003
15.4
E
1865 SVENDBORG
IMO 9454230
 1,085 TEU 2006
15.4
E
1866 MSC ANZIO II
IMO 9306237
 1,574 TEU 2007
15.5
E
1867 EGY CROWN
IMO 9216107
 1,129 TEU 2000
15.5
E
1868 MARFRET GUYANE
IMO 9362334
 1,691 TEU 2007
15.5
E
1869 MSC ADRIANA II
IMO 9169055
 1,658 TEU 1998
15.6
E
1870 MSC ROMINA II
IMO 9449821
 1,496 TEU 2009
15.6
E
1871 GRANDE CAMEROON
IMO 9377482
 800 TEU 2010
15.6
E
1872 MEDKON PERLA
IMO 9366457
 915 TEU 2007
15.6
E
1873 GRANDE GUINEA
IMO 9437919
 800 TEU 2010
15.7
E
1874 MSC EMILIE
IMO 9334832
 1,732 TEU 2006
15.7
E
1875 BILBAO TRADER
IMO 9306835
 1,118 TEU 2006
15.7
E
1876 GRANDE NIGERIA
IMO 9246580
 1,321 TEU 2003
15.7
E
1877 JONATHAN P
IMO 9357872
 1,732 TEU 2006
15.8
E
1878 GRANDE BRASILE
IMO 9198123
 1,302 TEU 2000
15.8
E
1879 GRANDE AMBURGO
IMO 9246607
 1,321 TEU 2003
15.8
E
1880 JAN
IMO 9477335
 1,350 TEU 2009
15.8
E
1881 LIMARKO BREEZE
IMO 9516753
 1,740 TEU 2011
15.9
E
1882 CMA CGM SAINT LAURENT
IMO 9709219
 2,100 TEU 2015
15.9
E
1883 MSC MIA SUMMER II
IMO 9169067
 1,658 TEU 1999
15.9
E
1884 CMA CGM SINNAMARY
IMO 9845673
 2,200 TEU 2020
15.9
E
1885 MSC CAITLIN II
IMO 9169043
 1,658 TEU 1998
15.9
E
1886 ERASMUS MASTER
IMO 9449833
 1,496 TEU 2006
16.0
E
1887 MANDO
IMO 9175705
 1,174 TEU 1999
16.0
E
1888 MSC GAETA II
IMO 9306213
 1,574 TEU 2007
16.0
E
1889 MATILDE A
IMO 9292448
 1,200 TEU 2003
16.0
E
1890 ANNALISA P
IMO 9437141
 1,284 TEU 2008
16.1
E
1891 ELBSPRING
IMO 9462794
 1,425 TEU 2009
16.1
E
1892 CHATTANOOGA
IMO 9611034
 1,036 TEU 2012
16.1
E
1893 MSC HOGGAR
IMO 9286449
 858 TEU 2004
16.1
E
1894 BALTIC SHARK
IMO 9315032
 868 TEU 2004
16.1
E
1895 CONTSHIP BOX
IMO 9449845
 1,496 TEU 2009
16.2
E
1896 EF EMIRA
IMO 9357810
 1,706 TEU 2008
16.2
E
1897 SC MARIGOT
IMO 9275115
 1,200 TEU 2005
16.2
E
1898 BG GREEN
IMO 9964613
 1,400 TEU 2021
16.2
E
1899 MSC CEDAR II
IMO 9231092
 1,680 TEU 2001
16.3
E
1900 MARIELYST
IMO 9448669
 1,085 TEU 2010
16.3
E
Page 38 of 45 — 2,221 vessels
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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2025 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.