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 |
|---|---|---|---|---|---|
| 1451 |
SEA ENDURANCE
IMO 9516179
|
9,762 | 2012 |
15.6
|
D |
| 1452 |
SOLENTBANK
IMO 9361744
|
4,889 | 2007 |
15.6
|
D |
| 1453 |
LUCKY SEA
IMO 9108439
|
3,004 | 1994 |
15.6
|
D |
| 1454 |
O7 LAFITE
IMO 9534482
|
10,049 | 2013 |
15.6
|
D |
| 1455 |
RIX ELEONORA
IMO 9194830
|
3,722 | 1998 |
15.6
|
D |
| 1456 |
AGAETE
IMO 9044932
|
3,686 | 1991 |
15.6
|
D |
| 1457 |
KRISTIINA
IMO 9187916
|
7,232 | 1999 |
15.6
|
D |
| 1458 |
XYG HONG KONG
IMO 9372925
|
11,184 | 2008 |
15.6
|
D |
| 1459 |
ARAMIS
IMO 9815329
|
4,938 | 2018 |
15.6
|
D |
| 1460 |
KINNE
IMO 9306689
|
4,765 | 2004 |
15.6
|
D |
| 1461 |
BBC WISCONSIN
IMO 9283966
|
12,672 | 2004 |
15.6
|
D |
| 1462 |
FRI KARMSUND
IMO 9211066
|
4,935 | 1999 |
15.6
|
D |
| 1463 |
YUKSEL KARABEKIR
IMO 9610614
|
8,053 | 2011 |
15.6
|
D |
| 1464 |
HEIKE LEHMANN
IMO 9805439
|
4,810 | 2020 |
15.7
|
D |
| 1465 |
TASMAN
IMO 9849136
|
4,716 | 2015 |
15.7
|
D |
| 1466 |
ROGALAND
IMO 9505596
|
9,734 | 2011 |
15.7
|
D |
| 1467 |
BBC BALBOA
IMO 9501667
|
8,089 | 2012 |
15.7
|
D |
| 1468 |
RIGHT STEP
IMO 9128013
|
5,535 | 1996 |
15.7
|
D |
| 1469 |
REYMAR
IMO 9552032
|
5,235 | 2011 |
15.7
|
D |
| 1470 |
SUNMI
IMO 9073581
|
4,148 | 1993 |
15.7
|
D |
| 1471 |
BBC OREGON
IMO 9501265
|
12,661 | 2010 |
15.7
|
D |
| 1472 |
FRI OCEAN
IMO 9195690
|
3,647 | 2000 |
15.7
|
D |
| 1473 |
BBC AMETHYST
IMO 9504724
|
14,453 | 2012 |
15.7
|
D |
| 1474 |
BBC CORAL
IMO 9563720
|
14,488 | 2012 |
15.7
|
D |
| 1475 |
BBC MACAU
IMO 9351373
|
11,172 | 2008 |
15.7
|
D |
| 1476 |
O7 ALSACE
IMO 9511648
|
10,500 | 2010 |
15.7
|
D |
| 1477 |
MYRTE
IMO 9364136
|
8,390 | 2008 |
15.7
|
D |
| 1478 |
LEONIE
IMO 9858682
|
3,850 | 2020 |
15.7
|
D |
| 1479 |
ARKLOW GLOBE
IMO 9874105
|
5,142 | 2023 |
15.7
|
D |
| 1480 |
HAVVA KARABEKIR
IMO 9408712
|
8,063 | 2008 |
15.7
|
D |
| 1481 |
EVITA
IMO 9381433
|
8,169 | 2009 |
15.7
|
D |
| 1482 |
HAPPY RIVER
IMO 9139294
|
15,443 | 1997 |
15.7
|
D |
| 1483 |
WILSON AVONMOUTH
IMO 9313747
|
3,595 | 2010 |
15.7
|
D |
| 1484 |
CELTIC
IMO 9917672
|
4,587 | 2021 |
15.7
|
D |
| 1485 |
UML VICTORIA
IMO 9500053
|
12,912 | 2009 |
15.7
|
D |
| 1486 |
NICOLA L
IMO 9361718
|
4,995 | 2006 |
15.7
|
D |
| 1487 |
AJOS
IMO 9145138
|
3,002 | 1996 |
15.7
|
D |
| 1488 |
WILSON AMSTERDAM
IMO 9313735
|
3,603 | 2009 |
15.7
|
D |
| 1489 |
ERNA SU
IMO 9037290
|
9,205 | 2002 |
15.7
|
D |
| 1490 |
MOLENGRACHT
IMO 9571533
|
12,196 | 2012 |
15.8
|
D |
| 1491 |
HELGE
IMO 9677404
|
5,098 | 2013 |
15.8
|
D |
| 1492 |
ARKLOW GUARD
IMO 9874129
|
5,141 | 2024 |
15.8
|
D |
| 1493 |
ST.MARIA
IMO 9467134
|
19,404 | 2011 |
15.8
|
D |
| 1494 |
BOCS VISION
IMO 9359961
|
12,584 | 2008 |
15.8
|
D |
| 1495 |
ARKLOW GEM
IMO 9874088
|
5,150 | 2023 |
15.8
|
D |
| 1496 |
GULF WIND
IMO 8818075
|
3,858 | 1990 |
15.8
|
D |
| 1497 |
NIKLAS G.
IMO 9534303
|
6,050 | 2011 |
15.8
|
D |
| 1498 |
ABLE
IMO 9001136
|
7,416 | 1991 |
15.8
|
D |
| 1499 |
EKEN
IMO 9263564
|
4,775 | 2003 |
15.8
|
D |
| 1500 |
VICTORIA
IMO 9523926
|
8,546 | 2010 |
15.8
|
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.