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 |
|---|---|---|---|---|---|
| 1751 |
LAPPLAND
IMO 9505132
|
6,500 | 2020 |
17.4
|
D |
| 1752 |
BBC BAHRAIN
IMO 9578751
|
7,967 | 2012 |
17.4
|
D |
| 1753 |
ILKA
IMO 8504947
|
1,925 | 1985 |
17.4
|
D |
| 1754 |
WILSON GRIP
IMO 9126912
|
3,884 | 1996 |
17.4
|
D |
| 1755 |
WILSON PALDISKI
IMO 9373527
|
4,905 | 2007 |
17.4
|
D |
| 1756 |
WILSON MOSEL
IMO 9060687
|
2,665 | 1993 |
17.4
|
D |
| 1757 |
VESTVIND
IMO 9750579
|
10,238 | 2016 |
17.4
|
D |
| 1758 |
RIX AMETHYST
IMO 9173185
|
2,953 | 1999 |
17.4
|
D |
| 1759 |
FRISIAN OCTA
IMO 9526095
|
8,284 | 2010 |
17.4
|
D |
| 1760 |
HEINZ G.
IMO 9536521
|
3,798 | 2011 |
17.4
|
D |
| 1761 |
ARKLOW VALOUR
IMO 9772565
|
5,159 | 2017 |
17.4
|
D |
| 1762 |
ST. SOFIA
IMO 9419008
|
16,577 | 2011 |
17.5
|
D |
| 1763 |
BBC LIVORNO
IMO 9570670
|
7,933 | 2012 |
17.5
|
D |
| 1764 |
NOORDVLIET
IMO 9518220
|
3,850 | 2013 |
17.5
|
D |
| 1765 |
BBC BANGKOK
IMO 9437165
|
8,046 | 2011 |
17.5
|
D |
| 1766 |
CELINA
IMO 9019200
|
6,182 | 2001 |
17.5
|
D |
| 1767 |
FRISIAN OCEAN
IMO 9385922
|
8,029 | 2001 |
17.5
|
D |
| 1768 |
BBC GDANSK
IMO 9436965
|
7,787 | 2009 |
17.5
|
D |
| 1769 |
RIX MISTRAL
IMO 9173513
|
3,720 | 1997 |
17.5
|
D |
| 1770 |
SDS GREEN
IMO 9504621
|
8,537 | 2010 |
17.5
|
D |
| 1771 |
DINTELBORG
IMO 9163685
|
8,832 | 1999 |
17.5
|
D |
| 1772 |
WILSON LISTA
IMO 9117208
|
3,944 | 1994 |
17.5
|
D |
| 1773 |
PREGOL HAV
IMO 8519239
|
2,291 | 1985 |
17.5
|
D |
| 1774 |
MIRAMAR
IMO 9552044
|
5,233 | 2011 |
17.5
|
D |
| 1775 |
PLANTIJNGRACHT
IMO 9424572
|
19,330 | 2010 |
17.5
|
D |
| 1776 |
FAST JEF
IMO 9136101
|
3,202 | 1996 |
17.5
|
D |
| 1777 |
RIX BAY
IMO 9017410
|
4,279 | 1998 |
17.6
|
D |
| 1778 |
RHEINTAL
IMO 9375903
|
3,689 | 2007 |
17.6
|
D |
| 1779 |
SWAMI
IMO 9100126
|
4,304 | 1995 |
17.6
|
D |
| 1780 |
MANISA KATE / LOENERBORG
IMO 9421099
|
8,111 | 2008 |
17.6
|
D |
| 1781 |
ARUCAS
IMO 9197492
|
5,767 | 2001 |
17.6
|
D |
| 1782 |
ANNIKA
IMO 9000833
|
3,568 | 1989 |
17.6
|
D |
| 1783 |
ESTLAND
IMO 9247314
|
5,464 | 2002 |
17.6
|
D |
| 1784 |
DELAMAR
IMO 9528500
|
4,030 | 2011 |
17.6
|
D |
| 1785 |
LUNAMAR
IMO 9551662
|
5,134 | 2010 |
17.6
|
D |
| 1786 |
BBC RHONETAL
IMO 9614701
|
17,577 | 2013 |
17.6
|
D |
| 1787 |
SCHELDEDIJK
IMO 9514925
|
4,891 | 2010 |
17.6
|
D |
| 1788 |
CELAL SAHIN
IMO 9352157
|
4,300 | 2006 |
17.6
|
D |
| 1789 |
SPANACO RELIABILITY
IMO 9373515
|
5,000 | 2007 |
17.6
|
D |
| 1790 |
BREB COURTESY
IMO 9421130
|
7,812 | 2009 |
17.6
|
D |
| 1791 |
WILSON GOOLE
IMO 9126687
|
3,705 | 1995 |
17.6
|
D |
| 1792 |
WILSON HARRIER
IMO 9064891
|
4,206 | 1993 |
17.7
|
D |
| 1793 |
MARIA G
IMO 8205187
|
1,685 | 1984 |
17.7
|
D |
| 1794 |
SYRENA
IMO 9508641
|
5,463 | 2010 |
17.7
|
D |
| 1795 |
KREETE
IMO 9279408
|
3,999 | 2003 |
17.7
|
D |
| 1796 |
SUURHUSEN.S
IMO 9123245
|
4,261 | 1996 |
17.7
|
D |
| 1797 |
ORIENTAL
IMO 9085077
|
5,501 | 1994 |
17.7
|
D |
| 1798 |
VERTOM MARJOLIJN
IMO 9507350
|
3,584 | 2010 |
17.7
|
D |
| 1799 |
WILSON HOOK
IMO 9017434
|
4,280 | 2003 |
17.7
|
D |
| 1800 |
SUA
IMO 9436276
|
7,502 | 2009 |
17.7
|
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.