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 |
|---|---|---|---|---|---|
| 701 |
BBC CAMPANA
IMO 9291963
|
12,837 | 2004 |
12.4
|
C |
| 702 |
KAIE
IMO 9504102
|
11,198 | 2010 |
12.4
|
C |
| 703 |
CHELSEA-1
IMO 9495612
|
6,135 | 2008 |
12.4
|
C |
| 704 |
BIG RISE
IMO 9509267
|
8,441 | 2009 |
12.5
|
C |
| 705 |
ANDESBORG
IMO 9466324
|
17,294 | 2011 |
12.5
|
C |
| 706 |
AUGUSTA LUNA
IMO 9480124
|
17,370 | 2011 |
12.5
|
C |
| 707 |
ARKLOW MEADOW
IMO 9440277
|
14,998 | 2010 |
12.5
|
C |
| 708 |
ARKLOW MILL
IMO 9440265
|
14,998 | 2010 |
12.5
|
C |
| 709 |
ARKLOW BEACH
IMO 9638783
|
8,650 | 2014 |
12.5
|
C |
| 710 |
IJZERBORG
IMO 9456733
|
13,212 | 2010 |
12.5
|
C |
| 711 |
SEVKETTIN SONAY
IMO 9334313
|
14,888 | 2006 |
12.5
|
C |
| 712 |
VIKINGBANK
IMO 9604184
|
11,940 | 2012 |
12.5
|
C |
| 713 |
SIFTERI
IMO 9452323
|
10,588 | 2008 |
12.5
|
C |
| 714 |
LONGERA
IMO 9988097
|
8,797 | 2024 |
12.6
|
C |
| 715 |
ONEGO DUERO
IMO 9580780
|
9,770 | 2012 |
12.6
|
D |
| 716 |
TAIGA DESGAGNES
IMO 9303302
|
17,287 | 2007 |
12.6
|
D |
| 717 |
ARKLOW BAY
IMO 9638771
|
8,658 | 2014 |
12.6
|
D |
| 718 |
SUNNANHAV
IMO 9341160
|
9,402 | 2006 |
12.6
|
D |
| 719 |
BBC HUDSON
IMO 9435868
|
17,327 | 2009 |
12.6
|
D |
| 720 |
ESL AFRICA
IMO 9397171
|
17,356 | 2007 |
12.6
|
D |
| 721 |
ONEGO DEUSTO
IMO 9399129
|
9,833 | 2008 |
12.6
|
D |
| 722 |
MARFAAM
IMO 9526100
|
8,429 | 2011 |
12.6
|
D |
| 723 |
YAMATAI
IMO 9567714
|
19,818 | 2010 |
12.6
|
D |
| 724 |
BBC MINNESOTA
IMO 9260378
|
12,840 | 2004 |
12.6
|
D |
| 725 |
YI HUI REN HAI
IMO 9628685
|
12,312 | 2013 |
12.6
|
D |
| 726 |
UMS-ALBEDO
IMO 9217163
|
10,629 | 2002 |
12.6
|
D |
| 727 |
NAVIN VULTURE
IMO 9543328
|
7,935 | 2009 |
12.7
|
D |
| 728 |
UAL TEXAS
IMO 9542350
|
8,600 | 2013 |
12.7
|
D |
| 729 |
KS AIM
IMO 9261085
|
12,792 | 2005 |
12.7
|
D |
| 730 |
SELAM
IMO 9418286
|
7,935 | 2008 |
12.7
|
D |
| 731 |
SILVER LION
IMO 9281487
|
6,315 | 2005 |
12.7
|
D |
| 732 |
TIBER RIVER
IMO 9650949
|
7,402 | 2014 |
12.7
|
D |
| 733 |
SIGYN W
IMO 9754446
|
12,207 | 2018 |
12.7
|
D |
| 734 |
SANTANA
IMO 9449388
|
10,860 | 2007 |
12.7
|
D |
| 735 |
AMURBORG
IMO 9466336
|
17,294 | 2011 |
12.7
|
D |
| 736 |
SLETRINGEN
IMO 9911927
|
8,534 | 2021 |
12.7
|
D |
| 737 |
NAVIN HARRIER
IMO 9506409
|
7,933 | 2008 |
12.7
|
D |
| 738 |
EBROBORG
IMO 9463451
|
11,197 | 2010 |
12.7
|
D |
| 739 |
LONGEON
IMO 9988102
|
8,797 | 2024 |
12.7
|
D |
| 740 |
ALEXIA I
IMO 9365049
|
10,887 | 2005 |
12.7
|
D |
| 741 |
BOSFOR
IMO 9369083
|
11,121 | 2008 |
12.8
|
D |
| 742 |
ARKLOW BEACON
IMO 9638795
|
8,662 | 2014 |
12.8
|
D |
| 743 |
LADY LEYLA
IMO 9106986
|
11,366 | 1995 |
12.8
|
D |
| 744 |
KALKVIK
IMO 9341172
|
9,402 | 2007 |
12.8
|
D |
| 745 |
YM AMAZON
IMO 9622758
|
11,500 | 2013 |
12.8
|
D |
| 746 |
BR BROTHER
IMO 8418265
|
8,890 | 1985 |
12.8
|
D |
| 747 |
VESTANHAV
IMO 9504152
|
10,089 | 2012 |
12.8
|
D |
| 748 |
DANZIGERGRACHT
IMO 9420796
|
18,143 | 2009 |
12.8
|
D |
| 749 |
INDUSTRIAL MERCHANT
IMO 9534470
|
10,021 | 2013 |
12.8
|
D |
| 750 |
TRANSBAY
IMO 9187033
|
17,539 | 1999 |
12.8
|
D |
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.