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 |
|---|---|---|---|---|---|
| 551 |
HOSEI SAKURA
IMO 9673197
|
16,949 | 2014 |
10.2
|
C |
| 552 |
SIGMA
IMO 9350537
|
10,131 | 2005 |
10.2
|
C |
| 553 |
CAN S
IMO 9640889
|
13,999 | 2013 |
10.2
|
C |
| 554 |
FULDABORG
IMO 9559092
|
14,603 | 2012 |
10.3
|
C |
| 555 |
OCEAN DREAM
IMO 9519511
|
11,939 | 2009 |
10.3
|
C |
| 556 |
KAPITAN SHYRIAGIN
IMO 9137234
|
6,258 | 1998 |
10.3
|
C |
| 557 |
GEMINI CAPO
IMO 9662485
|
10,813 | 2012 |
10.3
|
C |
| 558 |
LADY HATICE
IMO 9413078
|
18,930 | 2009 |
10.3
|
C |
| 559 |
KUBROSLI Y
IMO 8000836
|
11,990 | 1981 |
10.3
|
C |
| 560 |
ORUBA
IMO 9430624
|
10,611 | 2007 |
10.4
|
C |
| 561 |
CARTAGENA
IMO 9521863
|
18,809 | 2012 |
10.4
|
C |
| 562 |
ARIF AMCA
IMO 9616084
|
11,086 | 2012 |
10.4
|
C |
| 563 |
MUHARREM DADAYLI
IMO 9558581
|
13,449 | 2010 |
10.4
|
C |
| 564 |
SELECTA
IMO 9424807
|
14,030 | 2007 |
10.4
|
C |
| 565 |
VLIEBORG
IMO 9554781
|
11,902 | 2012 |
10.4
|
C |
| 566 |
FWN ARCTIC
IMO 9931484
|
12,563 | 2023 |
10.4
|
C |
| 567 |
BOZKURT
IMO 9171371
|
10,555 | 2000 |
10.4
|
C |
| 568 |
TIMBERLAND
IMO 9204790
|
20,406 | 2000 |
10.5
|
C |
| 569 |
HANA H
IMO 9143855
|
7,600 | 1998 |
10.5
|
C |
| 570 |
SOPHIA I
IMO 9546007
|
12,232 | 2011 |
10.5
|
C |
| 571 |
FINNBORG
IMO 9419321
|
14,603 | 2011 |
10.5
|
C |
| 572 |
HELENE JULIE
IMO 9287314
|
13,988 | 2004 |
10.5
|
C |
| 573 |
ALUNA
IMO 9590773
|
11,287 | 2011 |
10.6
|
C |
| 574 |
ADAMOON
IMO 9521758
|
19,582 | 2011 |
10.6
|
C |
| 575 |
ELBEBORG
IMO 9568249
|
12,004 | 2011 |
10.6
|
C |
| 576 |
SANDRA
IMO 9549669
|
13,549 | 2009 |
10.6
|
C |
| 577 |
LIDER HALIL
IMO 9462275
|
10,264 | 2020 |
10.6
|
C |
| 578 |
BEGONIA S
IMO 9445540
|
12,119 | 2007 |
10.7
|
C |
| 579 |
ELLA
IMO 9894105
|
9,331 | 2021 |
10.7
|
C |
| 580 |
EIRA
IMO 9225299
|
19,625 | 2001 |
10.7
|
C |
| 581 |
CSL FLEXVIK
IMO 9521825
|
18,003 | 2012 |
10.7
|
C |
| 582 |
VERACRUZ
IMO 9521849
|
19,596 | 2012 |
10.7
|
C |
| 583 |
VOLGABORG
IMO 9631072
|
11,902 | 2013 |
10.7
|
C |
| 584 |
ICDAS-5
IMO 9829916
|
15,621 | 2019 |
10.8
|
C |
| 585 |
JORIX
IMO 9419802
|
8,191 | 2006 |
10.8
|
C |
| 586 |
KEMET STAR
IMO 9154282
|
17,064 | 1999 |
10.8
|
C |
| 587 |
ALPPILA
IMO 9381706
|
20,499 | 2011 |
10.8
|
C |
| 588 |
WO LONG SONG
IMO 9416783
|
27,354 | 2010 |
10.8
|
C |
| 589 |
OBIRIX
IMO 9504267
|
7,966 | 2008 |
10.8
|
C |
| 590 |
BBC GEORGIA
IMO 9357224
|
12,797 | 2008 |
10.9
|
C |
| 591 |
TONAL
IMO 9576129
|
7,852 | 2010 |
10.9
|
C |
| 592 |
EXEBORG
IMO 9650482
|
11,950 | 2013 |
10.9
|
C |
| 593 |
ENAS H
IMO 9610822
|
10,034 | 2011 |
10.9
|
C |
| 594 |
LEDA
IMO 9648178
|
6,171 | 2013 |
10.9
|
C |
| 595 |
ADAVEGA
IMO 9539339
|
12,427 | 2010 |
10.9
|
C |
| 596 |
SAADET
IMO 9522063
|
12,198 | 2009 |
11.0
|
C |
| 597 |
HERMANA
IMO 9545948
|
12,223 | 2010 |
11.1
|
C |
| 598 |
DA XIANG
IMO 9768552
|
28,577 | 2017 |
11.1
|
C |
| 599 |
SEAHORSE
IMO 9159000
|
8,474 | 1997 |
11.1
|
C |
| 600 |
OMAYA
IMO 8408648
|
8,875 | 1984 |
11.1
|
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 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.