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 |
|---|---|---|---|---|---|
| 2651 |
LILA CASABLANCA
IMO 9621039
|
35,501 | 2012 |
5.8
|
D |
| 2652 |
BUNUN ACE
IMO 9628570
|
37,744 | 2013 |
5.8
|
D |
| 2653 |
BUNDU
IMO 9273014
|
16,765 | 2003 |
5.8
|
D |
| 2654 |
LIVERPOOL STRAIT
IMO 9609718
|
37,405 | 2013 |
5.8
|
D |
| 2655 |
KARLINO
IMO 9727510
|
39,000 | 2019 |
5.8
|
D |
| 2656 |
ONE UNION
IMO 9227833
|
46,492 | 2001 |
5.8
|
D |
| 2657 |
PEWEE
IMO 9740160
|
37,653 | 2014 |
5.8
|
D |
| 2658 |
AKTI
IMO 9660619
|
57,936 | 2014 |
5.8
|
D |
| 2659 |
QU SHAN HAI
IMO 9454668
|
54,611 | 2010 |
5.8
|
D |
| 2660 |
LOCH LOMOND
IMO 9639464
|
38,436 | 2012 |
5.8
|
D |
| 2661 |
GEORGIOS P
IMO 9476680
|
57,051 | 2010 |
5.8
|
D |
| 2662 |
DENSA TIGER
IMO 9432476
|
55,089 | 2010 |
5.8
|
D |
| 2663 |
SIDER BEAR
IMO 9657856
|
40,484 | 2013 |
5.8
|
D |
| 2664 |
AFRICAN ROLLER
IMO 9715191
|
39,685 | 2015 |
5.8
|
D |
| 2665 |
LIBERTY BAY
IMO 9522893
|
36,800 | 2012 |
5.8
|
D |
| 2666 |
BLUE BALESTIER
IMO 9338539
|
32,119 | 2006 |
5.8
|
D |
| 2667 |
HALKI
IMO 9543419
|
38,879 | 2011 |
5.8
|
D |
| 2668 |
CHIOS FREEDOM
IMO 9680255
|
36,612 | 2015 |
5.8
|
D |
| 2669 |
SHENG XIANG HAI
IMO 9533062
|
56,936 | 2010 |
5.8
|
D |
| 2670 |
ARCADIA
IMO 9695640
|
39,202 | 2015 |
5.8
|
D |
| 2671 |
FEDERAL SABLE
IMO 9595888
|
37,169 | 2012 |
5.8
|
D |
| 2672 |
MIKE THOMAS
IMO 9567453
|
56,644 | 2011 |
5.8
|
D |
| 2673 |
DESERT GLORY
IMO 9543691
|
57,412 | 2011 |
5.8
|
D |
| 2674 |
ALONI
IMO 9670420
|
38,737 | 2014 |
5.8
|
D |
| 2675 |
SEA FALCON
IMO 9766358
|
37,151 | 2017 |
5.8
|
D |
| 2676 |
AFRICAN CRATE
IMO 9657870
|
39,049 | 2014 |
5.8
|
D |
| 2677 |
YAN DANG HAI
IMO 9488229
|
53,446 | 2008 |
5.8
|
D |
| 2678 |
QI XIAN LING
IMO 9656864
|
34,532 | 2012 |
5.8
|
D |
| 2679 |
OMORFI
IMO 9494060
|
58,105 | 2010 |
5.8
|
D |
| 2680 |
DOCE
IMO 9571624
|
34,938 | 2013 |
5.8
|
D |
| 2681 |
TULPAR
IMO 9285407
|
34,790 | 2002 |
5.9
|
D |
| 2682 |
STRATEGIC VENTURE
IMO 9648104
|
40,000 | 2014 |
5.9
|
D |
| 2683 |
LV SONG HAI
IMO 9751365
|
38,862 | 2016 |
5.9
|
D |
| 2684 |
TBC PRINCESS
IMO 9606871
|
31,966 | 2013 |
5.9
|
D |
| 2685 |
KANAVU BENEFIT
IMO 9912361
|
37,292 | 2021 |
5.9
|
D |
| 2686 |
TRUE HARMONY
IMO 9470789
|
28,449 | 2008 |
5.9
|
D |
| 2687 |
LYNX
IMO 9464950
|
36,866 | 2011 |
5.9
|
D |
| 2688 |
SOLIN
IMO 9629483
|
51,545 | 2012 |
5.9
|
D |
| 2689 |
NITAYA NAREE
IMO 9700031
|
39,266 | 2015 |
5.9
|
D |
| 2690 |
EDFU
IMO 9139256
|
71,572 | 1997 |
5.9
|
D |
| 2691 |
FEDERAL HUNTER
IMO 9205938
|
36,563 | 2001 |
5.9
|
D |
| 2692 |
GANT YRIA
IMO 9723954
|
37,983 | 2016 |
5.9
|
D |
| 2693 |
ULTRA ESTERHAZY
IMO 9643946
|
38,228 | 2012 |
5.9
|
D |
| 2694 |
NAVI VEGA
IMO 9481099
|
35,896 | 2011 |
5.9
|
D |
| 2695 |
LIMNOS
IMO 9566552
|
56,671 | 2010 |
5.9
|
D |
| 2696 |
TRAWIND ROC
IMO 9609299
|
33,451 | 2012 |
5.9
|
D |
| 2697 |
ES HONESTY
IMO 9652325
|
37,052 | 2014 |
5.9
|
D |
| 2698 |
KAMARI
IMO 9412634
|
53,822 | 2011 |
5.9
|
D |
| 2699 |
POSEIDON S
IMO 9405485
|
53,482 | 2008 |
5.9
|
D |
| 2700 |
SUPER ARSENAL
IMO 9316933
|
29,858 | 2005 |
5.9
|
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 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.