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 |
|---|---|---|---|---|---|
| 2551 |
TOMINI MISTRAL
IMO 9754094
|
39,100 | 2016 |
5.5
|
D |
| 2552 |
BONTRUP AMSTERDAM
IMO 8110681
|
59,954 | 1984 |
5.5
|
D |
| 2553 |
APAGEON
IMO 9278870
|
52,483 | 2005 |
5.5
|
D |
| 2554 |
HIZIR REIS
IMO 9180360
|
34,949 | 1999 |
5.5
|
D |
| 2555 |
DAISY OCEAN
IMO 9456226
|
56,563 | 2010 |
5.5
|
D |
| 2556 |
DESERT VICTORY
IMO 9543706
|
57,434 | 2011 |
5.5
|
D |
| 2557 |
NY SUNRISE
IMO 9934814
|
40,281 | 2023 |
5.5
|
D |
| 2558 |
PATMOS JOHN
IMO 9588536
|
56,633 | 2011 |
5.5
|
D |
| 2559 |
GAT FATHER
IMO 9764013
|
35,737 | 2016 |
5.5
|
D |
| 2560 |
FRIEDERIKE SCHULTE
IMO 9721425
|
40,058 | 2015 |
5.5
|
D |
| 2561 |
DENSA HAWK
IMO 9649093
|
36,746 | 2011 |
5.5
|
D |
| 2562 |
LV SONG HAI
IMO 9751365
|
38,862 | 2016 |
5.5
|
D |
| 2563 |
AN DING HAI
IMO 9751303
|
38,800 | 2017 |
5.5
|
D |
| 2564 |
OCEAN INNOVATION
IMO 9659892
|
38,072 | 2013 |
5.6
|
D |
| 2565 |
FIORA
IMO 9584877
|
58,724 | 2013 |
5.6
|
D |
| 2566 |
YASA ILHAN
IMO 9396218
|
55,526 | 2007 |
5.6
|
D |
| 2567 |
AFRICAN MACAW
IMO 9767431
|
37,800 | 2016 |
5.6
|
D |
| 2568 |
ROCHESTER
IMO 9991628
|
40,510 | 2025 |
5.6
|
D |
| 2569 |
ANNEGRIT
IMO 9512630
|
60,220 | 2016 |
5.6
|
D |
| 2570 |
FEDERAL KUMANO
IMO 9244257
|
36,489 | 2003 |
5.6
|
D |
| 2571 |
CONSOLIDATOR
IMO 9368869
|
58,811 | 2007 |
5.6
|
D |
| 2572 |
MBS ODYSSEY
IMO 9668934
|
37,429 | 2015 |
5.6
|
D |
| 2573 |
AHSOKA
IMO 9669976
|
36,334 | 2013 |
5.6
|
D |
| 2574 |
GREAT PROFIT
IMO 9792888
|
38,648 | 2018 |
5.6
|
D |
| 2575 |
LYNX
IMO 9464950
|
36,866 | 2011 |
5.6
|
D |
| 2576 |
HONY FUTURE
IMO 9583823
|
56,716 | 2006 |
5.6
|
D |
| 2577 |
SOPOT
IMO 9727522
|
39,000 | 2019 |
5.6
|
D |
| 2578 |
SW SOUTH WIND I
IMO 9478626
|
56,300 | 2009 |
5.6
|
D |
| 2579 |
STELLAR ONTARIO
IMO 9700811
|
28,284 | 2014 |
5.6
|
D |
| 2580 |
TRAWIND DOLPHIN
IMO 9562453
|
33,686 | 2012 |
5.6
|
D |
| 2581 |
JULIETTA D
IMO 9590618
|
37,202 | 2010 |
5.6
|
D |
| 2582 |
BAI IZMIR
IMO 9855410
|
39,492 | 2015 |
5.6
|
D |
| 2583 |
CL CONTIGO
IMO 9703411
|
40,799 | 2015 |
5.6
|
D |
| 2584 |
AMFITRITI
IMO 9463592
|
58,814 | 2010 |
5.6
|
D |
| 2585 |
SIDER ATHENA
IMO 9657844
|
40,522 | 2013 |
5.6
|
D |
| 2586 |
GOKOVA-M
IMO 9243526
|
52,512 | 2002 |
5.6
|
D |
| 2587 |
STAR CLEO
IMO 9594638
|
56,582 | 2013 |
5.6
|
D |
| 2588 |
ISHIZUCHI STAR
IMO 9811919
|
37,637 | 2017 |
5.6
|
D |
| 2589 |
KAMBOS
IMO 9674799
|
36,309 | 2014 |
5.6
|
D |
| 2590 |
RB DYLAN
IMO 9500041
|
56,129 | 2012 |
5.6
|
D |
| 2591 |
NORSE ANTWERP
IMO 9909663
|
40,020 | 2021 |
5.6
|
D |
| 2592 |
SYNVAL
IMO 9763708
|
37,976 | 2016 |
5.6
|
D |
| 2593 |
AM PRESTIGE
IMO 9489833
|
38,118 | 2014 |
5.6
|
D |
| 2594 |
PELICAN ISLAND
IMO 9668922
|
57,905 | 2014 |
5.6
|
D |
| 2595 |
TSUKUYOMI ETERNITY
IMO 9791078
|
37,116 | 2021 |
5.6
|
D |
| 2596 |
FEDERAL WELLAND
IMO 9205926
|
36,563 | 2000 |
5.6
|
D |
| 2597 |
FORMENTERA
IMO 9721413
|
38,710 | 2015 |
5.6
|
D |
| 2598 |
GANT YRIA
IMO 9723954
|
37,983 | 2016 |
5.6
|
D |
| 2599 |
YELLOWSTONE
IMO 9830123
|
38,705 | 2019 |
5.6
|
D |
| 2600 |
ARMIA KRAJOWA
IMO 9708033
|
39,092 | 2013 |
5.6
|
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.