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 |
|---|---|---|---|---|---|
| 2601 |
ARMIA KRAJOWA
IMO 9708033
|
39,092 | 2013 |
5.6
|
D |
| 2602 |
YELLOWSTONE
IMO 9830123
|
38,705 | 2019 |
5.6
|
D |
| 2603 |
TOMINI ALIZE
IMO 9754082
|
39,046 | 2016 |
5.6
|
D |
| 2604 |
NIKOS N
IMO 9412646
|
53,815 | 2011 |
5.6
|
D |
| 2605 |
MAZOWSZE
IMO 9386914
|
38,981 | 2009 |
5.6
|
D |
| 2606 |
FEDERAL BERING
IMO 9697832
|
34,564 | 2015 |
5.6
|
D |
| 2607 |
PVT CORAL
IMO 9558696
|
57,260 | 2011 |
5.6
|
D |
| 2608 |
SHENG MAO HAI
IMO 9533086
|
56,901 | 2011 |
5.6
|
D |
| 2609 |
FEDERAL SPRUCE
IMO 9610468
|
37,141 | 2012 |
5.6
|
D |
| 2610 |
WADI TIBA
IMO 9460746
|
80,469 | 2011 |
5.6
|
D |
| 2611 |
LEGIONY POLSKIE
IMO 9708045
|
39,000 | 2016 |
5.6
|
D |
| 2612 |
STAR FIGHTER
IMO 9642198
|
61,455 | 2013 |
5.6
|
D |
| 2613 |
MANNA
IMO 9304100
|
55,697 | 2005 |
5.6
|
D |
| 2614 |
GOLDEN ISLE
IMO 9709233
|
38,767 | 2015 |
5.6
|
D |
| 2615 |
KAPTAN ARIF BAYRAKTAR
IMO 9449560
|
57,452 | 2010 |
5.6
|
D |
| 2616 |
LAUREL ISLAND
IMO 9801158
|
37,832 | 2017 |
5.6
|
D |
| 2617 |
FEDERAL CEDAR
IMO 9671101
|
34,564 | 2016 |
5.6
|
D |
| 2618 |
ABTENAUER
IMO 9655212
|
36,056 | 2014 |
5.6
|
D |
| 2619 |
APHRODITE L
IMO 9487615
|
81,365 | 2011 |
5.6
|
D |
| 2620 |
ROSTRUM EUROPE
IMO 9910105
|
40,003 | 2021 |
5.6
|
D |
| 2621 |
CL KIZUNA
IMO 9789049
|
37,520 | 2023 |
5.7
|
D |
| 2622 |
SAFI FORTUNE
IMO 9550321
|
28,467 | 2009 |
5.7
|
D |
| 2623 |
YASA OSAKA
IMO 9948279
|
37,403 | 2023 |
5.7
|
D |
| 2624 |
BODRUM-M
IMO 9425784
|
58,126 | 2010 |
5.7
|
D |
| 2625 |
YASA EMIRHAN
IMO 9454503
|
55,545 | 2008 |
5.7
|
D |
| 2626 |
WHIPLASH
IMO 9629249
|
53,224 | 2012 |
5.7
|
D |
| 2627 |
AMILYN
IMO 9728368
|
34,443 | 2015 |
5.7
|
D |
| 2628 |
ASPARUKH
IMO 9488578
|
57,329 | 2010 |
5.7
|
D |
| 2629 |
BUNUN STAR
IMO 9912440
|
37,301 | 2022 |
5.7
|
D |
| 2630 |
SEA FORTRESS
IMO 9317547
|
55,303 | 2008 |
5.7
|
D |
| 2631 |
HARTLAUB
IMO 9977957
|
39,600 | 2024 |
5.7
|
D |
| 2632 |
FEDERAL HUDSON
IMO 9205902
|
36,563 | 2000 |
5.7
|
D |
| 2633 |
CAPTAIN JOHN
IMO 9537379
|
56,925 | 2011 |
5.7
|
D |
| 2634 |
STINGER
IMO 9762871
|
38,629 | 2015 |
5.7
|
D |
| 2635 |
EAGLE TRADER
IMO 9648855
|
57,981 | 2013 |
5.7
|
D |
| 2636 |
STRATEGIC HARMONY
IMO 9689897
|
39,880 | 2014 |
5.7
|
D |
| 2637 |
VC VICTORY
IMO 9519315
|
56,952 | 2011 |
5.7
|
D |
| 2638 |
AFRICAN ROLLER
IMO 9715191
|
39,685 | 2015 |
5.7
|
D |
| 2639 |
GOLDEN PIONEER
IMO 9225055
|
75,211 | 2001 |
5.7
|
D |
| 2640 |
FEDERAL YUKON
IMO 9205897
|
36,563 | 2000 |
5.7
|
D |
| 2641 |
WHITEWING
IMO 9943231
|
37,370 | 2022 |
5.7
|
D |
| 2642 |
BENJAMIN CONFIDENCE
IMO 9713234
|
34,898 | 2017 |
5.7
|
D |
| 2643 |
BBC JUPITER
IMO 9577630
|
37,135 | 2014 |
5.7
|
D |
| 2644 |
XIN HAI TONG 18
IMO 9519004
|
57,070 | 2009 |
5.7
|
D |
| 2645 |
NORDIC DALIAN
IMO 9667588
|
37,500 | 2013 |
5.7
|
D |
| 2646 |
MIA
IMO 9618501
|
38,529 | 2011 |
5.7
|
D |
| 2647 |
YANGZE 33
IMO 9617624
|
47,114 | 2012 |
5.7
|
D |
| 2648 |
SOLIN
IMO 9629483
|
51,545 | 2012 |
5.7
|
D |
| 2649 |
ES JASMINE
IMO 9738387
|
38,860 | 2018 |
5.7
|
D |
| 2650 |
LIBERTY BAY
IMO 9522893
|
36,800 | 2012 |
5.7
|
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.