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 |
|---|---|---|---|---|---|
| 2901 |
ASIAN MAJESTY
IMO 9724996
|
62,466 | 2016 |
6.4
|
E |
| 2902 |
HERAKLITOS
IMO 9422794
|
37,221 | 2011 |
6.4
|
E |
| 2903 |
HIZIR REIS
IMO 9180360
|
34,949 | 1999 |
6.4
|
E |
| 2904 |
AFRICAN STORK
IMO 9733272
|
40,481 | 2015 |
6.4
|
E |
| 2905 |
FEDERAL KATSURA
IMO 9293923
|
32,594 | 2005 |
6.4
|
E |
| 2906 |
APPALOOSA
IMO 9646704
|
36,067 | 2013 |
6.4
|
E |
| 2907 |
FEDERAL HUDSON
IMO 9205902
|
36,563 | 2000 |
6.4
|
E |
| 2908 |
PHILLIP BAY
IMO 9714757
|
40,030 | 2015 |
6.4
|
E |
| 2909 |
AMANDA C
IMO 9482782
|
34,446 | 2012 |
6.4
|
E |
| 2910 |
PODLASIE
IMO 9346811
|
38,981 | 2008 |
6.4
|
E |
| 2911 |
DESPINA
IMO 9445124
|
28,534 | 2007 |
6.4
|
E |
| 2912 |
CLIPPER TRENT
IMO 9587233
|
34,025 | 2012 |
6.4
|
E |
| 2913 |
GEMINI
IMO 9376309
|
55,781 | 2006 |
6.4
|
E |
| 2914 |
GDYNIA
IMO 9594248
|
37,930 | 2012 |
6.4
|
E |
| 2915 |
NEW LEGACY
IMO 9124782
|
28,665 | 1996 |
6.4
|
E |
| 2916 |
ETHRA 1
IMO 9414759
|
32,641 | 2010 |
6.4
|
E |
| 2917 |
OUTRIDER
IMO 9701061
|
33,190 | 2016 |
6.4
|
E |
| 2918 |
MAZOWSZE
IMO 9386914
|
38,981 | 2009 |
6.4
|
E |
| 2919 |
UNITY ODYSSEY
IMO 9668934
|
37,429 | 2015 |
6.4
|
E |
| 2920 |
ASTRO POLARIS
IMO 9623051
|
37,054 | 2014 |
6.4
|
E |
| 2921 |
BC ARMONIA
IMO 9706334
|
28,365 | 2014 |
6.4
|
E |
| 2922 |
ZHEN ZHU HAI
IMO 9738088
|
39,746 | 2015 |
6.4
|
E |
| 2923 |
EMERALD CONFIDENCE
IMO 9672234
|
34,393 | 2015 |
6.4
|
E |
| 2924 |
SHENG CHENG HAI
IMO 9505481
|
56,632 | 2013 |
6.4
|
E |
| 2925 |
CHINTANA NAREE
IMO 9464039
|
33,945 | 2013 |
6.4
|
E |
| 2926 |
VERITY
IMO 9577604
|
37,163 | 2012 |
6.4
|
E |
| 2927 |
MEDROSE
IMO 9630743
|
57,919 | 2013 |
6.4
|
E |
| 2928 |
QING FENG LING
IMO 9663702
|
34,472 | 2013 |
6.4
|
E |
| 2929 |
CLIPPER APOLLONIA
IMO 9527996
|
32,755 | 2010 |
6.4
|
E |
| 2930 |
STRATEGIC TENACITY
IMO 9626302
|
36,851 | 2012 |
6.4
|
E |
| 2931 |
FOXTROT
IMO 9580144
|
38,688 | 2012 |
6.4
|
E |
| 2932 |
PAVLARA
IMO 9741736
|
40,000 | 2016 |
6.4
|
E |
| 2933 |
TRITON WIND I
IMO 9621003
|
37,113 | 2013 |
6.4
|
E |
| 2934 |
SUPRA DUKE
IMO 9478858
|
55,612 | 2011 |
6.5
|
E |
| 2935 |
AFRICAN OXPECKER
IMO 9681895
|
39,763 | 2014 |
6.5
|
E |
| 2936 |
DEEP BLUE
IMO 9616723
|
37,196 | 2012 |
6.5
|
E |
| 2937 |
STRATEGIC RESOLVE
IMO 9719329
|
38,872 | 2015 |
6.5
|
E |
| 2938 |
MONTARA
IMO 9234202
|
33,476 | 2001 |
6.5
|
E |
| 2939 |
CERES ONE
IMO 9698434
|
37,913 | 2017 |
6.5
|
E |
| 2940 |
MAREM
IMO 9545077
|
34,148 | 2012 |
6.5
|
E |
| 2941 |
PAN AMBER
IMO 9626003
|
38,220 | 2012 |
6.5
|
E |
| 2942 |
KURPIE
IMO 9423786
|
38,981 | 2009 |
6.5
|
E |
| 2943 |
ELIAS
IMO 9624172
|
28,406 | 2012 |
6.5
|
E |
| 2944 |
NORD SANTIAGO
IMO 9831488
|
39,475 | 2018 |
6.5
|
E |
| 2945 |
BR GLORY
IMO 8907577
|
22,273 | 1990 |
6.5
|
E |
| 2946 |
ETNA
IMO 9393618
|
48,549 | 2007 |
6.5
|
E |
| 2947 |
VINDONISSA
IMO 9520950
|
58,110 | 2012 |
6.5
|
E |
| 2948 |
AURELIA
IMO 9589085
|
37,294 | 2012 |
6.5
|
E |
| 2949 |
CLIPPER SPEY
IMO 9587219
|
33,985 | 2011 |
6.5
|
E |
| 2950 |
WARIYA NAREE
IMO 9353668
|
53,833 | 2011 |
6.5
|
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.