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 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 |
|---|---|---|---|---|---|
| 2901 |
LV DAISY
IMO 9597991
|
32,580 | 2011 |
6.3
|
E |
| 2902 |
CAPE GEORGE
IMO 9496331
|
35,996 | 2012 |
6.3
|
E |
| 2903 |
EAST BANGKOK
IMO 9659490
|
32,474 | 2012 |
6.3
|
E |
| 2904 |
FEDERAL KATSURA
IMO 9293923
|
32,594 | 2005 |
6.3
|
E |
| 2905 |
AGHIA DYNAMI
IMO 9577628
|
37,071 | 2013 |
6.3
|
E |
| 2906 |
BLUE STAR
IMO 9579327
|
37,947 | 2011 |
6.3
|
E |
| 2907 |
NORDIC NANJING
IMO 9647291
|
35,712 | 2013 |
6.3
|
E |
| 2908 |
DS SOFIE BULKER
IMO 9310604
|
28,682 | 2007 |
6.3
|
E |
| 2909 |
TAZ
IMO 9703825
|
35,016 | 2015 |
6.3
|
E |
| 2910 |
DS MYKONOS
IMO 9647875
|
30,912 | 2013 |
6.3
|
E |
| 2911 |
MDS ATHENA
IMO 9450674
|
36,472 | 2011 |
6.3
|
E |
| 2912 |
NANAMI HOPE
IMO 9609299
|
33,451 | 2012 |
6.3
|
E |
| 2913 |
BREADFAN
IMO 9626936
|
56,453 | 2012 |
6.3
|
E |
| 2914 |
WHITE DEFENDER
IMO 9621895
|
37,960 | 2012 |
6.3
|
E |
| 2915 |
ANDALUCIA
IMO 9667576
|
37,500 | 2013 |
6.3
|
E |
| 2916 |
NORD SANTIAGO
IMO 9831488
|
39,475 | 2018 |
6.3
|
E |
| 2917 |
LMZ ARIEL
IMO 9632818
|
56,418 | 2012 |
6.3
|
E |
| 2918 |
AURELIA
IMO 9589085
|
37,294 | 2012 |
6.3
|
E |
| 2919 |
SKY GATE
IMO 9445136
|
28,397 | 2008 |
6.3
|
E |
| 2920 |
AFRICAN OSPREY
IMO 9612143
|
34,697 | 2012 |
6.3
|
E |
| 2921 |
NEW FAITH
IMO 9191034
|
29,952 | 1998 |
6.3
|
E |
| 2922 |
ELIAS
IMO 9624172
|
28,406 | 2012 |
6.3
|
E |
| 2923 |
WIGEON
IMO 9358395
|
37,238 | 2007 |
6.4
|
E |
| 2924 |
OLIVIA
IMO 9180396
|
34,947 | 2000 |
6.4
|
E |
| 2925 |
ARNICA
IMO 9514418
|
56,106 | 2010 |
6.4
|
E |
| 2926 |
LAMBI
IMO 9595254
|
33,221 | 2012 |
6.4
|
E |
| 2927 |
CRINIS
IMO 9598165
|
28,378 | 2011 |
6.4
|
E |
| 2928 |
MDS ANNA
IMO 9609691
|
37,000 | 2012 |
6.4
|
E |
| 2929 |
STRATEGIC VISION
IMO 9610640
|
37,186 | 2012 |
6.4
|
E |
| 2930 |
INCE ISTANBUL
IMO 9636278
|
80,584 | 2013 |
6.4
|
E |
| 2931 |
SUPER ARSENAL
IMO 9316933
|
29,858 | 2005 |
6.4
|
E |
| 2932 |
ZANTE DAWN
IMO 9520637
|
34,125 | 2011 |
6.4
|
E |
| 2933 |
LILA II
IMO 9498315
|
34,604 | 2012 |
6.4
|
E |
| 2934 |
MED ISLAND
IMO 9322748
|
28,556 | 2005 |
6.4
|
E |
| 2935 |
FEDERAL KIBUNE
IMO 9606053
|
36,824 | 2010 |
6.4
|
E |
| 2936 |
BUDVA
IMO 9693501
|
35,000 | 2014 |
6.4
|
E |
| 2937 |
MUSKY
IMO 9688855
|
35,900 | 2014 |
6.4
|
E |
| 2938 |
CORETALENT OL
IMO 9597410
|
31,669 | 2014 |
6.4
|
E |
| 2939 |
STRATEGIC ALLIANCE
IMO 9648075
|
40,000 | 2014 |
6.4
|
E |
| 2940 |
TRUE BROTHER
IMO 9243693
|
31,812 | 2001 |
6.4
|
E |
| 2941 |
EVAGGELIA
IMO 9459383
|
35,315 | 2010 |
6.4
|
E |
| 2942 |
MAREM
IMO 9545077
|
34,148 | 2012 |
6.4
|
E |
| 2943 |
W-LION
IMO 9663104
|
59,999 | 2014 |
6.4
|
E |
| 2944 |
SUMMER SEA
IMO 9639763
|
35,240 | 2013 |
6.4
|
E |
| 2945 |
WHISTLER
IMO 9358371
|
37,272 | 2007 |
6.4
|
E |
| 2946 |
EVEREST K
IMO 9472696
|
35,065 | 2009 |
6.4
|
E |
| 2947 |
LAUSANNE
IMO 9575527
|
32,588 | 2010 |
6.4
|
E |
| 2948 |
STRADION
IMO 9522922
|
36,868 | 2011 |
6.4
|
E |
| 2949 |
PRAETORIUS
IMO 9470856
|
28,345 | 2008 |
6.4
|
E |
| 2950 |
NAJWA
IMO 9615561
|
56,970 | 2012 |
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 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.