Most Emission-Efficient Bulk Carriers
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 |
|---|---|---|---|---|---|
| 2851 |
DS MANATEE
IMO 9255189
|
27,129 | 2002 |
6.2
|
E |
| 2852 |
SUPER SAKA
IMO 9456551
|
55,596 | 2011 |
6.2
|
E |
| 2853 |
ILENAO
IMO 9524683
|
55,442 | 2010 |
6.2
|
E |
| 2854 |
SEASTAR ENDEAVOR
IMO 9544748
|
36,746 | 2011 |
6.2
|
E |
| 2855 |
TROGIR
IMO 9222572
|
41,300 | 2001 |
6.2
|
E |
| 2856 |
BEREKET M
IMO 9123702
|
24,089 | 1997 |
6.2
|
E |
| 2857 |
AGIA TRIADA
IMO 9397236
|
31,887 | 2009 |
6.2
|
E |
| 2858 |
STRATEGIC SAVANNAH
IMO 9686338
|
35,542 | 2013 |
6.2
|
E |
| 2859 |
G FORCE
IMO 9405497
|
53,503 | 2007 |
6.3
|
E |
| 2860 |
REGINA S
IMO 9767041
|
36,193 | 2017 |
6.3
|
E |
| 2861 |
PODHALE
IMO 9285134
|
38,981 | 2005 |
6.3
|
E |
| 2862 |
LADY MARY
IMO 9604744
|
28,238 | 2012 |
6.3
|
E |
| 2863 |
LAGO DI COMO
IMO 9674361
|
37,500 | 2014 |
6.3
|
E |
| 2864 |
CATIVERA
IMO 9172105
|
24,154 | 1998 |
6.3
|
E |
| 2865 |
ASTURCON
IMO 9646730
|
36,070 | 2011 |
6.3
|
E |
| 2866 |
NEWSEAS JADE
IMO 9288485
|
52,409 | 2005 |
6.3
|
E |
| 2867 |
GOLDENEYE
IMO 9637131
|
35,949 | 2014 |
6.3
|
E |
| 2868 |
GREBE BULKER
IMO 9441312
|
57,809 | 2010 |
6.3
|
E |
| 2869 |
COREWISE OL
IMO 9636395
|
37,059 | 2013 |
6.3
|
E |
| 2870 |
DIONE
IMO 9598086
|
28,253 | 2011 |
6.3
|
E |
| 2871 |
QUEEN GHAIDAA
IMO 9295567
|
32,621 | 2004 |
6.3
|
E |
| 2872 |
BATMAN
IMO 9657404
|
35,000 | 2014 |
6.3
|
E |
| 2873 |
THASSOS
IMO 9567233
|
56,760 | 2011 |
6.3
|
E |
| 2874 |
MALAK
IMO 9446702
|
56,942 | 2010 |
6.3
|
E |
| 2875 |
CS CALVINA
IMO 9542532
|
37,456 | 2011 |
6.3
|
E |
| 2876 |
YARA J
IMO 9118147
|
34,169 | 1997 |
6.3
|
E |
| 2877 |
SEAPEARL
IMO 9594468
|
32,956 | 2013 |
6.3
|
E |
| 2878 |
RODOPI
IMO 9498274
|
30,679 | 2012 |
6.3
|
E |
| 2879 |
THE FINDER
IMO 9493638
|
75,618 | 2011 |
6.3
|
E |
| 2880 |
LINK AMICI
IMO 9728394
|
34,398 | 2015 |
6.3
|
E |
| 2881 |
AQUITANIA
IMO 9611278
|
35,938 | 2012 |
6.3
|
E |
| 2882 |
ARKONA
IMO 9404443
|
37,852 | 2010 |
6.3
|
E |
| 2883 |
AMAPOLA
IMO 9588342
|
35,037 | 2011 |
6.3
|
E |
| 2884 |
GRAJALES
IMO 9571595
|
34,938 | 2012 |
6.3
|
E |
| 2885 |
CHARLIE
IMO 9595383
|
35,139 | 2011 |
6.3
|
E |
| 2886 |
HAMBURG TEAM
IMO 9855460
|
39,493 | 2019 |
6.3
|
E |
| 2887 |
PRINCESS SHAIMAA
IMO 9620138
|
32,046 | 2013 |
6.3
|
E |
| 2888 |
ATLANTIS UNITY
IMO 9594444
|
32,891 | 2012 |
6.3
|
E |
| 2889 |
KHOI VENTURES
IMO 9633288
|
28,207 | 2012 |
6.3
|
E |
| 2890 |
LIPSI
IMO 9522958
|
35,066 | 2011 |
6.3
|
E |
| 2891 |
STAR OMICRON
IMO 9313022
|
53,489 | 2005 |
6.3
|
E |
| 2892 |
PARITY
IMO 9486594
|
37,096 | 2012 |
6.3
|
E |
| 2893 |
PEBBLE BEACH
IMO 9595979
|
37,003 | 2013 |
6.3
|
E |
| 2894 |
ZULFIKAR
IMO 9211547
|
28,373 | 2000 |
6.3
|
E |
| 2895 |
LADY EVINA
IMO 9561916
|
29,077 | 2012 |
6.3
|
E |
| 2896 |
AMIRA RAFIF
IMO 9300192
|
32,355 | 2004 |
6.3
|
E |
| 2897 |
NACC KINGDOM
IMO 9135468
|
25,530 | 1996 |
6.3
|
E |
| 2898 |
PORT ALBERNI
IMO 9335886
|
33,499 | 2008 |
6.4
|
E |
| 2899 |
AZTECA
IMO 9646742
|
36,054 | 2014 |
6.4
|
E |
| 2900 |
PRIMUS
IMO 9310757
|
32,588 | 2006 |
6.4
|
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 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.