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 |
|---|---|---|---|---|---|
| 2251 |
TC VICTORY
IMO 9167344
|
4,023 | 1998 |
23.3
|
E |
| 2252 |
ORION
IMO 9143415
|
4,852 | 1998 |
23.4
|
E |
| 2253 |
WILSON MAAS
IMO 9145554
|
1,847 | 1997 |
23.4
|
E |
| 2254 |
LADY NURAY
IMO 9038373
|
4,166 | 1992 |
23.4
|
E |
| 2255 |
EEMS TRANSPORTER
IMO 9340300
|
2,900 | 2006 |
23.4
|
E |
| 2256 |
BBC OLYMPUS
IMO 9508457
|
9,318 | 2012 |
23.4
|
E |
| 2257 |
ANITA HAGEDORN
IMO 8505927
|
1,741 | 1985 |
23.4
|
E |
| 2258 |
FRI RIVER
IMO 9224104
|
3,300 | 2000 |
23.5
|
E |
| 2259 |
INDIANA JONES 1
IMO 8806149
|
4,402 | 1989 |
23.5
|
E |
| 2260 |
DELFIN
IMO 9173161
|
3,789 | 1998 |
23.5
|
E |
| 2261 |
BIOSTAR
IMO 9226176
|
2,440 | 2000 |
23.5
|
E |
| 2262 |
SILVER MARY
IMO 9311878
|
8,624 | 2005 |
23.5
|
E |
| 2263 |
INDUSTRIAL DREAM
IMO 9347853
|
7,947 | 2007 |
23.5
|
E |
| 2264 |
SCHILLIG
IMO 9505405
|
3,195 | 2012 |
23.6
|
E |
| 2265 |
HAV SAGA
IMO 8719073
|
3,017 | 1990 |
23.7
|
E |
| 2266 |
MARJATTA
IMO 9345374
|
3,481 | 2006 |
23.7
|
E |
| 2267 |
ONE DAY
IMO 9363261
|
2,803 | 2006 |
23.7
|
E |
| 2268 |
MITTELPLATE
IMO 9501203
|
3,184 | 2009 |
23.8
|
E |
| 2269 |
GT PIKE
IMO 9373278
|
3,850 | 2007 |
23.8
|
E |
| 2270 |
INDUSTRIAL DAWN
IMO 9347841
|
7,947 | 2007 |
23.8
|
E |
| 2271 |
HELENE B
IMO 9195406
|
3,171 | 2001 |
23.9
|
E |
| 2272 |
BBC SWITZERLAND
IMO 9433315
|
7,725 | 2008 |
23.9
|
E |
| 2273 |
AKDENIZ
IMO 9176474
|
7,853 | 1998 |
23.9
|
E |
| 2274 |
MPP CLEO
IMO 9373333
|
4,464 | 2008 |
23.9
|
E |
| 2275 |
MARJATTA
IMO 9126247
|
6,904 | 1996 |
23.9
|
E |
| 2276 |
RUNNER
IMO 9137193
|
2,521 | 1996 |
23.9
|
E |
| 2277 |
RIX UNION
IMO 9256559
|
4,279 | 2001 |
23.9
|
E |
| 2278 |
PERLITE
IMO 7928251
|
4,015 | 1981 |
23.9
|
E |
| 2279 |
BBC KIBO
IMO 9508421
|
9,340 | 2011 |
23.9
|
E |
| 2280 |
BEAUMAGIC
IMO 9373266
|
3,817 | 2007 |
23.9
|
E |
| 2281 |
SEDRATA
IMO 9557795
|
9,500 | 2011 |
24.0
|
E |
| 2282 |
ROTRA MARE
IMO 9365996
|
9,200 | 2009 |
24.0
|
E |
| 2283 |
BONACIEUX
IMO 9505297
|
3,172 | 2010 |
24.1
|
E |
| 2284 |
BORNHOLM
IMO 9361354
|
4,361 | 2008 |
24.1
|
E |
| 2285 |
JENNIFER
IMO 8404496
|
1,576 | 1984 |
24.1
|
E |
| 2286 |
WILSON WEDAU
IMO 9987079
|
2,897 | 2024 |
24.1
|
E |
| 2287 |
MARLA
IMO 8611013
|
1,900 | 1987 |
24.1
|
E |
| 2288 |
ANASTASIA K
IMO 8914154
|
3,148 | 1990 |
24.1
|
E |
| 2289 |
BBC XINGANG
IMO 9508483
|
9,279 | 2013 |
24.1
|
E |
| 2290 |
BIGLIFT BAFFIN
IMO 9758557
|
20,023 | 2016 |
24.2
|
E |
| 2291 |
GOURAYA
IMO 9393230
|
9,800 | 2010 |
24.2
|
E |
| 2292 |
EMMA F
IMO 8609618
|
3,005 | 1986 |
24.2
|
E |
| 2293 |
JOE 1
IMO 8714114
|
5,500 | 1989 |
24.2
|
E |
| 2294 |
ZIAD JUNIOR
IMO 9073086
|
5,342 | 1994 |
24.3
|
E |
| 2295 |
RIX VENTA
IMO 9240249
|
4,267 | 2001 |
24.3
|
E |
| 2296 |
BBC MONT BLANC
IMO 9508433
|
9,363 | 2011 |
24.3
|
E |
| 2297 |
ASMAR
IMO 8918708
|
6,900 | 1995 |
24.3
|
E |
| 2298 |
WILSON WAAL
IMO 9178446
|
1,836 | 1999 |
24.3
|
E |
| 2299 |
GULF BLUE
IMO 9125073
|
4,444 | 1997 |
24.3
|
E |
| 2300 |
HAV SKANDIC
IMO 8719114
|
3,090 | 1993 |
24.4
|
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 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.