Most Emission-Efficient General Cargos
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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1801 |
KADRI
IMO 9114725
|
4,955 | 1995 |
17.7
|
D |
| 1802 |
HUNZEDIJK
IMO 9515022
|
4,891 | 2011 |
17.8
|
D |
| 1803 |
MILLERNTOR
IMO 9265665
|
4,352 | 2003 |
17.8
|
D |
| 1804 |
RIX EIRA
IMO 9057226
|
3,186 | 1992 |
17.8
|
D |
| 1805 |
ARMARA JULES VERNE
IMO 9195717
|
3,785 | 2001 |
17.8
|
D |
| 1806 |
MUHAMMET GUMUSTAS 6
IMO 8509832
|
3,065 | 1985 |
17.8
|
D |
| 1807 |
LADY HAYAT
IMO 9075450
|
5,264 | 1995 |
17.8
|
D |
| 1808 |
HIMMEL
IMO 9518414
|
4,496 | 2010 |
17.8
|
D |
| 1809 |
BBC EDGE
IMO 9407598
|
10,323 | 2009 |
17.8
|
D |
| 1810 |
KAIRIT
IMO 9195949
|
4,956 | 2000 |
17.8
|
D |
| 1811 |
MARTENITSA
IMO 9138733
|
2,913 | 1996 |
17.8
|
D |
| 1812 |
KAISA
IMO 9333462
|
4,528 | 2005 |
17.8
|
D |
| 1813 |
RIX VOYAGER
IMO 9125671
|
4,241 | 1997 |
17.9
|
D |
| 1814 |
ARKLOW VENUS
IMO 9772591
|
5,171 | 2018 |
17.9
|
D |
| 1815 |
RIZECEM
IMO 7903249
|
5,278 | 1979 |
17.9
|
D |
| 1816 |
LADY AYAN
IMO 9197480
|
5,211 | 2000 |
17.9
|
D |
| 1817 |
WILSON PALMA
IMO 9368417
|
4,624 | 2009 |
17.9
|
D |
| 1818 |
WILSON BREST
IMO 9126900
|
3,704 | 1995 |
17.9
|
D |
| 1819 |
WILSON POLA
IMO 9344526
|
4,960 | 2007 |
17.9
|
D |
| 1820 |
WILSON HUMBER
IMO 9017381
|
4,249 | 1996 |
17.9
|
D |
| 1821 |
SEA MELODY
IMO 9195638
|
3,783 | 2002 |
17.9
|
D |
| 1822 |
GERMAN SKY
IMO 9125047
|
4,450 | 1996 |
17.9
|
D |
| 1823 |
KETTER
IMO 9195860
|
5,050 | 2000 |
17.9
|
D |
| 1824 |
EMSTAL
IMO 9356878
|
3,701 | 2007 |
17.9
|
D |
| 1825 |
FINNLAND
IMO 9301598
|
7,099 | 2006 |
17.9
|
D |
| 1826 |
WILSON HANSTHOLM
IMO 9119567
|
4,310 | 1998 |
17.9
|
D |
| 1827 |
TARZAN
IMO 9128336
|
4,198 | 1995 |
17.9
|
D |
| 1828 |
SIDER RODI
IMO 9522001
|
8,520 | 2010 |
17.9
|
D |
| 1829 |
BBC LONDON
IMO 9513658
|
7,893 | 2011 |
17.9
|
D |
| 1830 |
ANITA
IMO 9479577
|
2,570 | 2013 |
17.9
|
D |
| 1831 |
NAOMI-B
IMO 9557367
|
2,600 | 2013 |
17.9
|
D |
| 1832 |
ICELANDICA HAV
IMO 8128884
|
2,325 | 1982 |
17.9
|
D |
| 1833 |
SEA TRADER
IMO 9364007
|
6,355 | 2007 |
17.9
|
D |
| 1834 |
WILSON LEITH
IMO 9150509
|
3,865 | 1997 |
17.9
|
D |
| 1835 |
OSTBENSE
IMO 9566784
|
7,300 | 2011 |
17.9
|
D |
| 1836 |
CUERA
IMO 9360489
|
4,582 | 2008 |
17.9
|
D |
| 1837 |
HELGA G.
IMO 1029053
|
3,798 | 2025 |
18.0
|
D |
| 1838 |
ISARTAL
IMO 9313670
|
3,712 | 2005 |
18.0
|
D |
| 1839 |
AMUESA
IMO 9320805
|
5,045 | 2007 |
18.0
|
D |
| 1840 |
ASLI ELIF
IMO 9349021
|
3,701 | 2005 |
18.0
|
D |
| 1841 |
WILSON BRAKE
IMO 9150511
|
3,863 | 1997 |
18.0
|
D |
| 1842 |
SNP STAR
IMO 9345362
|
3,987 | 2006 |
18.0
|
D |
| 1843 |
LADY BERNA
IMO 9214733
|
5,604 | 2003 |
18.0
|
D |
| 1844 |
RIX ONYX
IMO 9508639
|
4,742 | 2010 |
18.0
|
D |
| 1845 |
JELENA
IMO 9519042
|
5,400 | 2012 |
18.0
|
D |
| 1846 |
KAARI
IMO 9434761
|
7,100 | 2009 |
18.0
|
D |
| 1847 |
ALI AKAY
IMO 9358759
|
6,257 | 2007 |
18.0
|
D |
| 1848 |
SIEGFRIED LEHMANN
IMO 9325142
|
4,508 | 2005 |
18.0
|
D |
| 1849 |
WILSON BREMEN
IMO 9014717
|
3,932 | 1992 |
18.0
|
D |
| 1850 |
SILVA
IMO 9237010
|
5,464 | 2001 |
18.0
|
D |
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.
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.