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 |
|---|---|---|---|---|---|
| 2851 |
IGUAZU
IMO 9725914
|
43,343 | 2017 |
6.2
|
E |
| 2852 |
LILA HOUSTON
IMO 9559676
|
32,580 | 2010 |
6.2
|
E |
| 2853 |
KARAMEL
IMO 9316921
|
35,287 | 2005 |
6.2
|
E |
| 2854 |
KOSMAN
IMO 9630731
|
58,000 | 2013 |
6.2
|
E |
| 2855 |
ONE AND ONLY
IMO 9657868
|
40,576 | 2014 |
6.2
|
E |
| 2856 |
REGINA S
IMO 9767041
|
36,193 | 2017 |
6.2
|
E |
| 2857 |
ORAWA
IMO 9386926
|
38,956 | 2009 |
6.2
|
E |
| 2858 |
GREAT BEAUTY
IMO 9792876
|
38,645 | 2018 |
6.2
|
E |
| 2859 |
TRANSTIME
IMO 9595929
|
56,726 | 2012 |
6.2
|
E |
| 2860 |
TAN BINH 357
IMO 9606534
|
29,118 | 2012 |
6.2
|
E |
| 2861 |
MALAMIR
IMO 9555151
|
57,000 | 2011 |
6.2
|
E |
| 2862 |
ORIENT PRESTIGE
IMO 9397248
|
31,883 | 2006 |
6.2
|
E |
| 2863 |
IONIAN BAY
IMO 9747247
|
39,359 | 2016 |
6.2
|
E |
| 2864 |
ULTRA HANDY
IMO 9643958
|
38,215 | 2013 |
6.2
|
E |
| 2865 |
BC ARMONIA
IMO 9706334
|
28,365 | 2014 |
6.2
|
E |
| 2866 |
WL LADOGA
IMO 9659799
|
37,681 | 2014 |
6.2
|
E |
| 2867 |
KOCIEWIE
IMO 9423798
|
38,981 | 2009 |
6.2
|
E |
| 2868 |
FEDERAL KUSHIRO
IMO 9284702
|
32,762 | 2004 |
6.2
|
E |
| 2869 |
BC AMER
IMO 9685619
|
38,486 | 2013 |
6.2
|
E |
| 2870 |
MAVERICK
IMO 9762493
|
37,845 | 2018 |
6.2
|
E |
| 2871 |
KURPIE
IMO 9423786
|
38,981 | 2009 |
6.2
|
E |
| 2872 |
BOS COSTA
IMO 9310616
|
28,709 | 2007 |
6.2
|
E |
| 2873 |
APOGEE SPIRIT
IMO 9561875
|
29,638 | 2011 |
6.2
|
E |
| 2874 |
COPENHAGEN BULKER
IMO 9831490
|
39,511 | 2018 |
6.2
|
E |
| 2875 |
TOKYO SPIRIT
IMO 9669627
|
35,550 | 2014 |
6.2
|
E |
| 2876 |
WHITE WANDERER
IMO 9621869
|
37,869 | 2012 |
6.2
|
E |
| 2877 |
DSM ROSE
IMO 9303601
|
33,540 | 2004 |
6.2
|
E |
| 2878 |
NORDIC MERCHANTS
IMO 9689574
|
37,500 | 2014 |
6.2
|
E |
| 2879 |
TRUST STAR
IMO 9610236
|
36,232 | 2012 |
6.2
|
E |
| 2880 |
ZEYNEP C
IMO 9232151
|
53,806 | 2003 |
6.2
|
E |
| 2881 |
CERES ONE
IMO 9698434
|
37,913 | 2017 |
6.2
|
E |
| 2882 |
LILA SYDNEY
IMO 9660035
|
28,226 | 2013 |
6.2
|
E |
| 2883 |
NEVA
IMO 9213753
|
31,812 | 2000 |
6.2
|
E |
| 2884 |
EFFICIENCY OL
IMO 9491666
|
37,130 | 2010 |
6.3
|
E |
| 2885 |
DALARNA
IMO 9626120
|
35,958 | 2014 |
6.3
|
E |
| 2886 |
EGRET BULKER
IMO 9441295
|
57,809 | 2010 |
6.3
|
E |
| 2887 |
BLUE SAPPHIRE
IMO 9877339
|
38,580 | 2020 |
6.3
|
E |
| 2888 |
YANGTZE ALPHA
IMO 9632791
|
56,692 | 2012 |
6.3
|
E |
| 2889 |
LMZ EUROPA
IMO 9588562
|
56,771 | 2011 |
6.3
|
E |
| 2890 |
ASL CRYSTAL
IMO 9778997
|
38,300 | 2019 |
6.3
|
E |
| 2891 |
SINGAPORE BULKER
IMO 9599901
|
56,719 | 2012 |
6.3
|
E |
| 2892 |
DENSA FALCON
IMO 9649081
|
36,752 | 2013 |
6.3
|
E |
| 2893 |
COREOCEAN OL
IMO 9519212
|
28,358 | 2009 |
6.3
|
E |
| 2894 |
GDYNIA
IMO 9594248
|
37,930 | 2012 |
6.3
|
E |
| 2895 |
MUSTAFA BEY
IMO 9110339
|
27,209 | 1995 |
6.3
|
E |
| 2896 |
MERITIUS
IMO 9515632
|
28,417 | 2009 |
6.3
|
E |
| 2897 |
NICHOLAS
IMO 9490765
|
58,002 | 2010 |
6.3
|
E |
| 2898 |
DIANA-T
IMO 9467574
|
36,009 | 2010 |
6.3
|
E |
| 2899 |
PALAU
IMO 9261035
|
31,837 | 2003 |
6.3
|
E |
| 2900 |
LV DAISY
IMO 9597991
|
32,580 | 2011 |
6.3
|
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.