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 |
|---|---|---|---|---|---|
| 1251 |
FRI BERGEN
IMO 9361122
|
5,756 | 2009 |
14.7
|
C |
| 1252 |
ELARA
IMO 9437323
|
18,377 | 2010 |
14.7
|
C |
| 1253 |
ALAND
IMO 9147459
|
3,246 | 1996 |
14.7
|
C |
| 1254 |
FRANZISKA
IMO 9535618
|
10,872 | 2011 |
14.7
|
C |
| 1255 |
SKYLGE
IMO 9508809
|
8,398 | 2010 |
14.8
|
C |
| 1256 |
AMADEUS PEARL
IMO 9995844
|
3,811 | 2024 |
14.8
|
C |
| 1257 |
MOEZELBORG
IMO 9180839
|
9,732 | 1999 |
14.8
|
C |
| 1258 |
KAREWOOD GLORY
IMO 9281504
|
6,315 | 2006 |
14.8
|
C |
| 1259 |
ANNIE
IMO 9468097
|
12,653 | 2010 |
14.8
|
C |
| 1260 |
AGN RAGNAR
IMO 9148104
|
3,420 | 1996 |
14.8
|
C |
| 1261 |
KIRSI
IMO 9490179
|
5,746 | 2012 |
14.8
|
C |
| 1262 |
WES ESTHER
IMO 9953963
|
3,809 | 2023 |
14.8
|
C |
| 1263 |
UNZILE ANA
IMO 9133367
|
4,237 | 1996 |
14.8
|
C |
| 1264 |
AZZARO
IMO 9213727
|
8,733 | 2000 |
14.8
|
C |
| 1265 |
ATALAYA TMA
IMO 9369291
|
7,353 | 2008 |
14.8
|
C |
| 1266 |
AMBERLAND
IMO 9518969
|
5,724 | 2010 |
14.8
|
C |
| 1267 |
ECOMAR
IMO 9951848
|
5,433 | 2024 |
14.8
|
C |
| 1268 |
FEED HELGELAND
IMO 9163635
|
4,934 | 1999 |
14.8
|
C |
| 1269 |
YUCATAN
IMO 9367841
|
3,291 | 2005 |
14.8
|
C |
| 1270 |
FWN ATLANTIDE
IMO 9535620
|
10,872 | 2011 |
14.8
|
C |
| 1271 |
BORE WAY
IMO 9892884
|
6,768 | 2022 |
14.8
|
C |
| 1272 |
SUNA
IMO 9080986
|
4,143 | 1994 |
14.8
|
C |
| 1273 |
UAL AFRICA
IMO 9529243
|
8,327 | 2011 |
14.8
|
C |
| 1274 |
KONINGSBORG
IMO 9155925
|
9,067 | 1998 |
14.8
|
C |
| 1275 |
DELTAGRACHT
IMO 9420801
|
18,143 | 2009 |
14.8
|
C |
| 1276 |
MORNING TIDE
IMO 9320506
|
12,008 | 2006 |
14.8
|
C |
| 1277 |
WILSON ECO I
IMO 1052139
|
3,800 | 2024 |
14.8
|
C |
| 1278 |
JAEGER ARROW
IMO 9215347
|
23,529 | 2001 |
14.8
|
C |
| 1279 |
SEA EXPLORER
IMO 9516155
|
9,736 | 2012 |
14.8
|
C |
| 1280 |
FULDATAL
IMO 9962988
|
3,804 | 2024 |
14.8
|
C |
| 1281 |
MERWEBORG
IMO 9142552
|
9,732 | 1997 |
14.8
|
C |
| 1282 |
JUTLAND
IMO 9277345
|
7,870 | 2004 |
14.8
|
C |
| 1283 |
ERGE
IMO 9508603
|
5,652 | 2010 |
14.8
|
C |
| 1284 |
BENABELL G.
IMO 9864772
|
3,798 | 2021 |
14.8
|
C |
| 1285 |
NORRLAND
IMO 9358278
|
7,869 | 2006 |
14.8
|
C |
| 1286 |
WILSON SUND
IMO 8918473
|
6,486 | 1999 |
14.8
|
C |
| 1287 |
WES MADITA
IMO 9962990
|
3,803 | 2024 |
14.8
|
C |
| 1288 |
DEDEM
IMO 9001124
|
3,490 | 1993 |
14.9
|
C |
| 1289 |
HAPPY DOVER
IMO 9551959
|
18,074 | 2011 |
14.9
|
C |
| 1290 |
KIKKI C
IMO 9558036
|
6,805 | 2011 |
14.9
|
C |
| 1291 |
SIDER VULCANO
IMO 9486312
|
8,108 | 2010 |
14.9
|
C |
| 1292 |
HABIBE ANA
IMO 9133355
|
3,837 | 1995 |
14.9
|
C |
| 1293 |
UGURS
IMO 9539793
|
4,406 | 2007 |
14.9
|
C |
| 1294 |
TIDE NAVIGATOR
IMO 9526083
|
8,284 | 2011 |
14.9
|
C |
| 1295 |
UTE
IMO 9433339
|
7,400 | 2008 |
14.9
|
C |
| 1296 |
BALTIC COASTER
IMO 9963009
|
3,806 | 2024 |
14.9
|
C |
| 1297 |
TARANTO
IMO 9133513
|
3,005 | 1995 |
14.9
|
C |
| 1298 |
TAMAR
IMO 9341160
|
9,402 | 2006 |
14.9
|
C |
| 1299 |
SAFIYE ANA
IMO 9319947
|
3,536 | 2004 |
14.9
|
C |
| 1300 |
RIX ATLANTIC
IMO 9194270
|
4,150 | 1999 |
14.9
|
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.