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 2024. 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 |
|---|---|---|---|---|---|
| 851 |
UAL COLOGNE
IMO 9681534
|
8,736 | 2014 |
13.8
|
D |
| 852 |
MONTSERRAT
IMO 9213739
|
9,567 | 2000 |
13.8
|
D |
| 853 |
MARTINA
IMO 9594286
|
8,564 | 2012 |
13.8
|
D |
| 854 |
FRANBO PROSPECT
IMO 9512692
|
11,008 | 2010 |
13.8
|
D |
| 855 |
ADRIATICBORG
IMO 9546497
|
17,294 | 2011 |
13.8
|
D |
| 856 |
AL UDEID
IMO 9294965
|
10,508 | 2004 |
13.8
|
D |
| 857 |
VLISTBORG
IMO 9160346
|
9,567 | 1999 |
13.8
|
D |
| 858 |
SOFIA
IMO 9957414
|
7,896 | 2024 |
13.8
|
D |
| 859 |
HAPPY DOVER
IMO 9551959
|
18,074 | 2011 |
13.9
|
D |
| 860 |
HC MELINA
IMO 9415052
|
9,198 | 2011 |
13.9
|
D |
| 861 |
BORE WIND
IMO 9892901
|
6,792 | 2022 |
13.9
|
D |
| 862 |
BEAUTRANGA
IMO 9532812
|
8,250 | 2011 |
13.9
|
D |
| 863 |
OLIVIA
IMO 9957402
|
7,896 | 2024 |
13.9
|
D |
| 864 |
UAL BODEWES
IMO 9542336
|
8,327 | 2012 |
13.9
|
D |
| 865 |
MINERVAGRACHT
IMO 9571521
|
12,176 | 2011 |
14.0
|
D |
| 866 |
YM FUJI
IMO 9622760
|
10,952 | 2015 |
14.0
|
D |
| 867 |
INDUSTRIAL SKIPPER
IMO 9741138
|
12,329 | 2016 |
14.0
|
D |
| 868 |
ONEGO NEVA
IMO 9438585
|
11,087 | 2008 |
14.0
|
D |
| 869 |
LONGWOLF
IMO 9504126
|
11,023 | 2010 |
14.0
|
D |
| 870 |
JAEGER ARROW
IMO 9215347
|
23,529 | 2001 |
14.0
|
D |
| 871 |
SOPHIA
IMO 9467017
|
12,591 | 2011 |
14.0
|
D |
| 872 |
SCHIPPERSGRACHT
IMO 9197363
|
21,311 | 2000 |
14.0
|
D |
| 873 |
LADY VIVIANA
IMO 9320518
|
11,551 | 2005 |
14.0
|
D |
| 874 |
ANNAMARIA
IMO 9488633
|
8,091 | 2008 |
14.1
|
D |
| 875 |
TANJA
IMO 9534444
|
10,049 | 2011 |
14.1
|
D |
| 876 |
VOORNEBORG
IMO 9179373
|
9,567 | 1999 |
14.1
|
D |
| 877 |
KONINGSBORG
IMO 9155925
|
9,067 | 1998 |
14.1
|
D |
| 878 |
ARNEBORG
IMO 9333539
|
17,356 | 2006 |
14.1
|
D |
| 879 |
DELTAGRACHT
IMO 9420801
|
18,143 | 2009 |
14.1
|
D |
| 880 |
AMISOS
IMO 9584994
|
8,716 | 2011 |
14.1
|
D |
| 881 |
HAMBURG.HS
IMO 9168403
|
8,889 | 1997 |
14.1
|
D |
| 882 |
INDUSTRIAL SONG
IMO 9750464
|
12,292 | 2017 |
14.2
|
D |
| 883 |
HEEMSKERKGRACHT
IMO 9443669
|
12,672 | 2009 |
14.2
|
D |
| 884 |
SABAHAT SONAY
IMO 9370525
|
14,888 | 2007 |
14.2
|
D |
| 885 |
CONDOR MAGALLANES
IMO 9539365
|
17,954 | 2011 |
14.2
|
D |
| 886 |
KAREWOOD PRIDE
IMO 9281499
|
6,315 | 2006 |
14.2
|
D |
| 887 |
LADY JASMIN
IMO 9106974
|
11,307 | 1994 |
14.2
|
D |
| 888 |
BBC MARYLAND
IMO 9433298
|
12,721 | 2010 |
14.3
|
D |
| 889 |
SAVA
IMO 9158082
|
8,300 | 1999 |
14.3
|
D |
| 890 |
DEBBIE
IMO 9488061
|
12,731 | 2011 |
14.3
|
D |
| 891 |
VERTOM JOY
IMO 9706865
|
11,000 | 2023 |
14.3
|
D |
| 892 |
SCHELDEGRACHT
IMO 9202510
|
21,448 | 2000 |
14.3
|
D |
| 893 |
ONEGO BAYOU
IMO 9369069
|
11,087 | 2007 |
14.3
|
D |
| 894 |
MERWEBORG
IMO 9142552
|
9,732 | 1997 |
14.3
|
D |
| 895 |
MISSISSIPPIBORG
IMO 9207508
|
9,732 | 2000 |
14.3
|
D |
| 896 |
TRITO NAVIGATOR
IMO 9631357
|
8,137 | 2013 |
14.3
|
D |
| 897 |
BANDURA
IMO 9526071
|
8,217 | 2010 |
14.3
|
D |
| 898 |
STADIONGRACHT
IMO 9202508
|
21,323 | 2000 |
14.4
|
D |
| 899 |
FATIH
IMO 9381421
|
8,591 | 2009 |
14.4
|
D |
| 900 |
LADY DEBORA
IMO 9147875
|
7,580 | 1998 |
14.4
|
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 2024 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.