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 |
|---|---|---|---|---|---|
| 1301 |
WILSON AVEIRO
IMO 9375850
|
3,606 | 2008 |
14.9
|
C |
| 1302 |
HUDSONGRACHT
IMO 9433262
|
12,672 | 2008 |
14.9
|
C |
| 1303 |
BRIGITTE F
IMO 8504234
|
3,070 | 1985 |
14.9
|
C |
| 1304 |
SNOEKGRACHT
IMO 9202546
|
21,311 | 2000 |
14.9
|
C |
| 1305 |
RAMA H
IMO 8105404
|
8,214 | 1982 |
14.9
|
C |
| 1306 |
ALICE
IMO 9677399
|
5,098 | 2013 |
14.9
|
C |
| 1307 |
MUNTGRACHT
IMO 9571545
|
11,677 | 2012 |
14.9
|
C |
| 1308 |
WES ELISA
IMO 9953975
|
3,801 | 2023 |
14.9
|
C |
| 1309 |
NICOLE
IMO 9454814
|
6,684 | 2009 |
14.9
|
C |
| 1310 |
EDMY
IMO 9263540
|
7,894 | 2002 |
15.0
|
C |
| 1311 |
BELLIS
IMO 9381952
|
6,804 | 2007 |
15.0
|
C |
| 1312 |
ANNIKA BRAREN
IMO 9849148
|
5,023 | 2020 |
15.0
|
C |
| 1313 |
KAIRE
IMO 9454802
|
6,684 | 2008 |
15.0
|
C |
| 1314 |
HOUTMANGRACHT
IMO 9435765
|
12,635 | 2009 |
15.0
|
C |
| 1315 |
TUNA
IMO 9306691
|
4,775 | 2004 |
15.0
|
C |
| 1316 |
ONEGO OTRA
IMO 9535606
|
10,872 | 2010 |
15.0
|
C |
| 1317 |
STEVIE
IMO 9488035
|
12,767 | 2010 |
15.0
|
C |
| 1318 |
BBC ALBERTA
IMO 9468102
|
12,669 | 2010 |
15.0
|
C |
| 1319 |
SVEALAND
IMO 9195743
|
3,783 | 2001 |
15.0
|
C |
| 1320 |
LONGVIND
IMO 9547336
|
6,132 | 2011 |
15.0
|
C |
| 1321 |
FLEVOGRACHT
IMO 9509956
|
12,086 | 2011 |
15.0
|
C |
| 1322 |
DINTELDIJK
IMO 9346677
|
4,891 | 2007 |
15.0
|
C |
| 1323 |
RIX STREAM
IMO 9111125
|
2,689 | 1994 |
15.0
|
C |
| 1324 |
ELECTRAMAR
IMO 9951824
|
5,424 | 2023 |
15.0
|
C |
| 1325 |
MARGARETHA
IMO 9240548
|
10,526 | 2002 |
15.0
|
C |
| 1326 |
WILSON PORI
IMO 9201839
|
4,966 | 1999 |
15.0
|
C |
| 1327 |
SEA PROSPECT
IMO 9516143
|
9,735 | 2012 |
15.0
|
C |
| 1328 |
SILVER LION
IMO 9281487
|
6,315 | 2005 |
15.1
|
C |
| 1329 |
ANNA
IMO 9361110
|
5,097 | 2008 |
15.1
|
C |
| 1330 |
M/V MANISA SOLE
IMO 9306304
|
8,211 | 2006 |
15.1
|
C |
| 1331 |
ANNA
IMO 9566796
|
7,712 | 2011 |
15.1
|
C |
| 1332 |
KLEER
IMO 9393840
|
5,907 | 2008 |
15.1
|
C |
| 1333 |
ALMA
IMO 9969429
|
3,641 | 2024 |
15.1
|
C |
| 1334 |
OCEAN TRANGA
IMO 9532812
|
8,250 | 2011 |
15.1
|
C |
| 1335 |
SPANACO LOYALTY
IMO 9373503
|
5,000 | 2007 |
15.1
|
C |
| 1336 |
JAMTLAND
IMO 9277319
|
7,755 | 2003 |
15.1
|
C |
| 1337 |
WOLF
IMO 9306407
|
8,120 | 2006 |
15.1
|
C |
| 1338 |
SCHOUWENBANK
IMO 9361732
|
4,995 | 2007 |
15.1
|
C |
| 1339 |
HIKMET KARABEKIR
IMO 9421087
|
8,113 | 2008 |
15.1
|
C |
| 1340 |
FL STOROE
IMO 9268851
|
6,011 | 2005 |
15.1
|
C |
| 1341 |
WILSON HERON
IMO 9116022
|
4,228 | 1994 |
15.1
|
C |
| 1342 |
AMELAND
IMO 9508794
|
8,398 | 2009 |
15.1
|
C |
| 1343 |
MARIETJE NORA
IMO 9481609
|
9,068 | 2015 |
15.1
|
C |
| 1344 |
MARIETJE MARSILLA
IMO 9458248
|
8,493 | 2010 |
15.1
|
C |
| 1345 |
KRIS
IMO 9408889
|
8,678 | 2007 |
15.1
|
C |
| 1346 |
FRIEDHELM
IMO 9953951
|
3,803 | 2023 |
15.1
|
C |
| 1347 |
WILSON NEWCASTLE
IMO 9431006
|
8,701 | 2011 |
15.1
|
C |
| 1348 |
MEIKE
IMO 9105841
|
4,143 | 1994 |
15.1
|
C |
| 1349 |
FLUVIUS OTTER
IMO 9117961
|
3,280 | 1996 |
15.1
|
C |
| 1350 |
ALEXANDER
IMO 9433353
|
7,400 | 2009 |
15.1
|
C |
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.