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 |
|---|---|---|---|---|---|
| 1051 |
BOCS PASSION
IMO 9500065
|
12,906 | 2010 |
16.6
|
E |
| 1052 |
GABRIELA H
IMO 9147863
|
6,790 | 1998 |
16.6
|
E |
| 1053 |
MARGARETHA
IMO 9240548
|
10,526 | 2002 |
16.6
|
E |
| 1054 |
M/V MANISA SOLE
IMO 9306304
|
8,211 | 2006 |
16.6
|
E |
| 1055 |
DINTELBORG
IMO 9163685
|
8,832 | 1999 |
16.6
|
E |
| 1056 |
PIETERSGRACHT
IMO 9448384
|
19,864 | 2012 |
16.7
|
E |
| 1057 |
EBRU
IMO 9235490
|
8,961 | 2000 |
16.7
|
E |
| 1058 |
HAPPY STAR
IMO 9661259
|
18,062 | 2014 |
16.7
|
E |
| 1059 |
PROPUS
IMO 9133757
|
9,387 | 1997 |
16.7
|
E |
| 1060 |
MARBELLA
IMO 9406958
|
8,546 | 2008 |
16.7
|
E |
| 1061 |
PIJLGRACHT
IMO 9448358
|
19,379 | 2011 |
16.7
|
E |
| 1062 |
TANGO REY
IMO 9214185
|
8,600 | 2001 |
16.7
|
E |
| 1063 |
PUKA
IMO 9374973
|
12,016 | 2007 |
16.7
|
E |
| 1064 |
SAFI M
IMO 8502470
|
9,650 | 1985 |
16.8
|
E |
| 1065 |
HALLAND
IMO 9436238
|
6,805 | 2008 |
16.8
|
E |
| 1066 |
SEVEN AMARANTA
IMO 9306445
|
8,259 | 2007 |
16.8
|
E |
| 1067 |
HAPPY SKY
IMO 9457220
|
17,683 | 2013 |
16.8
|
E |
| 1068 |
SDS RED
IMO 9365518
|
8,546 | 2010 |
16.8
|
E |
| 1069 |
FWN PROVIDER
IMO 9770713
|
10,589 | 2017 |
16.8
|
E |
| 1070 |
COE ANNA
IMO 9366160
|
9,231 | 2012 |
16.8
|
E |
| 1071 |
MANISA SILVANA
IMO 9306316
|
8,515 | 2006 |
16.8
|
E |
| 1072 |
VICTORIA
IMO 9523926
|
8,546 | 2010 |
16.9
|
E |
| 1073 |
MANISA EMY / LEUVEBORG
IMO 9421063
|
8,656 | 2008 |
16.9
|
E |
| 1074 |
ROIBEIRA
IMO 9414187
|
7,781 | 2007 |
16.9
|
E |
| 1075 |
VERTOM MERIDIAAN
IMO 9385881
|
8,045 | 2010 |
16.9
|
E |
| 1076 |
HAPPY RIVER
IMO 9139294
|
15,443 | 1997 |
16.9
|
E |
| 1077 |
KARELIS-72
IMO 9433690
|
6,917 | 2008 |
17.0
|
E |
| 1078 |
KARELIS-71
IMO 9383883
|
6,882 | 2006 |
17.0
|
E |
| 1079 |
AUJAQ
IMO 9081320
|
12,730 | 1994 |
17.0
|
E |
| 1080 |
FRISIANA
IMO 9385893
|
8,027 | 2010 |
17.0
|
E |
| 1081 |
SIDER SONJA
IMO 9432505
|
8,546 | 2008 |
17.1
|
E |
| 1082 |
BILLIE
IMO 9488047
|
12,696 | 2011 |
17.1
|
E |
| 1083 |
MUNTGRACHT
IMO 9571545
|
11,677 | 2012 |
17.1
|
E |
| 1084 |
FLORETGRACHT
IMO 9507611
|
12,067 | 2012 |
17.1
|
E |
| 1085 |
SDS GREEN
IMO 9504621
|
8,537 | 2010 |
17.1
|
E |
| 1086 |
MANISA BALU
IMO 9391036
|
8,450 | 2008 |
17.2
|
E |
| 1087 |
RUDOLF
IMO 9535591
|
10,872 | 2010 |
17.2
|
E |
| 1088 |
KFS MERYEM ANA
IMO 9575888
|
8,375 | 2010 |
17.3
|
E |
| 1089 |
SKYLGE
IMO 9508809
|
8,398 | 2010 |
17.3
|
E |
| 1090 |
PONTICA
IMO 9681974
|
9,005 | 2014 |
17.3
|
E |
| 1091 |
ALEKSANDR ANTONOV
IMO 8972261
|
6,088 | 1986 |
17.3
|
E |
| 1092 |
PLANTIJNGRACHT
IMO 9424572
|
19,330 | 2010 |
17.3
|
E |
| 1093 |
ASG KHERSON
IMO 9255579
|
7,796 | 2002 |
17.3
|
E |
| 1094 |
FRISIAN OCEAN
IMO 9385922
|
8,029 | 2001 |
17.3
|
E |
| 1095 |
POOLGRACHT
IMO 9448360
|
19,382 | 2011 |
17.4
|
E |
| 1096 |
MORAIME
IMO 9423853
|
7,126 | 2008 |
17.4
|
E |
| 1097 |
PALEISGRACHT
IMO 9448346
|
19,496 | 2011 |
17.4
|
E |
| 1098 |
SEA TRADER
IMO 9364007
|
6,355 | 2007 |
17.4
|
E |
| 1099 |
JOE
IMO 9351153
|
7,750 | 2007 |
17.5
|
E |
| 1100 |
ALEXANDRA
IMO 9196163
|
8,865 | 2000 |
17.6
|
E |
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.