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 |
|---|---|---|---|---|---|
| 2651 |
ES JASMINE
IMO 9738387
|
38,860 | 2018 |
5.7
|
D |
| 2652 |
DAIWAN INFINITY
IMO 9709348
|
34,376 | 2016 |
5.7
|
D |
| 2653 |
ANATOLIAN EAGLE
IMO 9490820
|
57,970 | 2011 |
5.7
|
D |
| 2654 |
GREBE BULKER
IMO 9441312
|
57,809 | 2010 |
5.7
|
D |
| 2655 |
ADELANTE
IMO 9597109
|
81,585 | 2012 |
5.7
|
D |
| 2656 |
YUAN XING RI ZHAO
IMO 9433559
|
56,784 | 2009 |
5.7
|
D |
| 2657 |
JIN QUAN
IMO 9796999
|
61,441 | 2017 |
5.7
|
D |
| 2658 |
ANSHUN
IMO 9851347
|
39,231 | 2019 |
5.7
|
D |
| 2659 |
PORT NAVIGATOR
IMO 9261750
|
35,107 | 2002 |
5.7
|
D |
| 2660 |
IRMGARD
IMO 9590967
|
38,167 | 2012 |
5.7
|
D |
| 2661 |
LOCH LOMOND
IMO 9639464
|
38,436 | 2012 |
5.7
|
D |
| 2662 |
CAPTAIN LEFTERIS
IMO 9541849
|
58,468 | 2013 |
5.7
|
D |
| 2663 |
BASIC ISLAND
IMO 9640061
|
38,037 | 2012 |
5.7
|
D |
| 2664 |
YANGTZE LEGEND
IMO 9706827
|
39,172 | 2015 |
5.7
|
D |
| 2665 |
LUNI
IMO 9070711
|
43,108 | 1994 |
5.7
|
D |
| 2666 |
RIZIK BEY
IMO 9285419
|
34,812 | 2004 |
5.7
|
D |
| 2667 |
NORDMOSEL
IMO 9741877
|
39,968 | 2017 |
5.7
|
D |
| 2668 |
DENSA CHEETAH
IMO 9649122
|
37,586 | 2013 |
5.7
|
D |
| 2669 |
STELLAR ALAZANI
IMO 9708265
|
28,180 | 2014 |
5.7
|
D |
| 2670 |
EVOLUTION
IMO 9122899
|
24,306 | 1995 |
5.7
|
D |
| 2671 |
RICARDA
IMO 9693329
|
39,949 | 2015 |
5.8
|
D |
| 2672 |
ENDLESS HORIZON
IMO 9499462
|
58,018 | 2012 |
5.8
|
D |
| 2673 |
CHUMERNA
IMO 9621871
|
37,854 | 2012 |
5.8
|
D |
| 2674 |
FEDERAL ASAHI
IMO 9200419
|
36,563 | 2000 |
5.8
|
D |
| 2675 |
STRATEGIC UNITY
IMO 9648099
|
40,000 | 2014 |
5.8
|
D |
| 2676 |
FEDERAL SABLE
IMO 9595888
|
37,169 | 2012 |
5.8
|
D |
| 2677 |
SOLENT
IMO 9375953
|
32,067 | 2008 |
5.8
|
D |
| 2678 |
URSA MAJOR
IMO 9789805
|
55,802 | 2017 |
5.8
|
D |
| 2679 |
CRESTY
IMO 9637143
|
35,977 | 2014 |
5.8
|
D |
| 2680 |
STAVROS
IMO 9425875
|
57,982 | 2010 |
5.8
|
D |
| 2681 |
TAI HARVEST
IMO 9261786
|
50,337 | 2003 |
5.8
|
D |
| 2682 |
PRINCESS FAYZAH
IMO 9260859
|
28,379 | 2002 |
5.8
|
D |
| 2683 |
YUAN HAI
IMO 9229697
|
52,009 | 2000 |
5.8
|
D |
| 2684 |
JIAYAO
IMO 9429065
|
57,011 | 2010 |
5.8
|
D |
| 2685 |
SVETI DUJAM
IMO 9519638
|
52,000 | 2010 |
5.8
|
D |
| 2686 |
BUNUN ACE
IMO 9628570
|
37,744 | 2013 |
5.8
|
D |
| 2687 |
NAPHA NAREE
IMO 9703423
|
38,737 | 2015 |
5.8
|
D |
| 2688 |
IVONE
IMO 9691486
|
28,294 | 2014 |
5.8
|
D |
| 2689 |
UBC TACOMA
IMO 9737888
|
37,332 | 2018 |
5.8
|
D |
| 2690 |
NEJAT
IMO 9960186
|
37,979 | 2023 |
5.8
|
D |
| 2691 |
TAI HARMONY
IMO 9232187
|
53,806 | 2004 |
5.8
|
D |
| 2692 |
AFRICAN WOODSTAR
IMO 9786047
|
39,875 | 2018 |
5.8
|
D |
| 2693 |
ZHONG CHANG 538
IMO 9567403
|
56,744 | 2010 |
5.8
|
D |
| 2694 |
GANT NEREA
IMO 9763693
|
37,985 | 2016 |
5.8
|
D |
| 2695 |
JASMINA D
IMO 9611292
|
36,093 | 2012 |
5.8
|
D |
| 2696 |
SUPRA DUKE
IMO 9478858
|
55,612 | 2011 |
5.8
|
D |
| 2697 |
LINDSAYLOU
IMO 9630729
|
58,000 | 2012 |
5.8
|
D |
| 2698 |
UBC HOUSTON
IMO 9697143
|
38,000 | 2015 |
5.8
|
D |
| 2699 |
CHISE BULKER
IMO 9667722
|
33,355 | 2014 |
5.8
|
D |
| 2700 |
ALAMO
IMO 9851335
|
39,258 | 2019 |
5.8
|
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 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.