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 |
|---|---|---|---|---|---|
| 2701 |
QI XIAN LING
IMO 9656864
|
34,532 | 2012 |
5.8
|
D |
| 2702 |
ALAMO
IMO 9851335
|
39,258 | 2019 |
5.8
|
D |
| 2703 |
TULIP
IMO 9583835
|
56,715 | 2012 |
5.8
|
D |
| 2704 |
BALTIC BAY
IMO 9761889
|
37,384 | 2018 |
5.8
|
D |
| 2705 |
PANOCEANIS
IMO 9460320
|
53,562 | 2007 |
5.8
|
D |
| 2706 |
HOWES JOANNA
IMO 9442641
|
56,785 | 2009 |
5.8
|
D |
| 2707 |
CAPE GULL
IMO 9674804
|
36,320 | 2013 |
5.8
|
D |
| 2708 |
DRAWNO
IMO 9727508
|
39,092 | 2013 |
5.8
|
D |
| 2709 |
FEDERAL BEAUFORT
IMO 9697818
|
34,564 | 2015 |
5.8
|
D |
| 2710 |
LAGO DI COMO
IMO 9674361
|
37,500 | 2014 |
5.8
|
D |
| 2711 |
LOLITA
IMO 1014979
|
40,420 | 2024 |
5.8
|
D |
| 2712 |
ASALET
IMO 9574169
|
28,189 | 2010 |
5.8
|
D |
| 2713 |
RINIA
IMO 9594406
|
56,746 | 2012 |
5.8
|
D |
| 2714 |
TOMINI LEVANT
IMO 9714783
|
38,719 | 2016 |
5.8
|
D |
| 2715 |
AFRICAN PIPER
IMO 9692777
|
34,302 | 2015 |
5.8
|
D |
| 2716 |
ECO CERBERUS
IMO 9894624
|
37,875 | 2021 |
5.8
|
D |
| 2717 |
SHANGHAI BULKER
IMO 9599913
|
56,719 | 2012 |
5.8
|
D |
| 2718 |
SUNFLOWER
IMO 9633020
|
28,364 | 2012 |
5.8
|
D |
| 2719 |
THEODORA
IMO 9462445
|
53,569 | 2008 |
5.8
|
D |
| 2720 |
ULTRA TATIO
IMO 9782986
|
37,927 | 2016 |
5.8
|
D |
| 2721 |
EGE-M
IMO 9323895
|
56,676 | 2008 |
5.8
|
D |
| 2722 |
ERMOUPOLIS
IMO 9691503
|
28,339 | 2014 |
5.9
|
D |
| 2723 |
S-BOUND
IMO 9610200
|
36,258 | 2012 |
5.9
|
D |
| 2724 |
HARUKA
IMO 9589619
|
28,392 | 2011 |
5.9
|
D |
| 2725 |
BUNUN KALON
IMO 9768033
|
37,653 | 2018 |
5.9
|
D |
| 2726 |
JIAN GUO HAI
IMO 9751286
|
38,766 | 2016 |
5.9
|
D |
| 2727 |
HARVESTER
IMO 9777711
|
37,600 | 2017 |
5.9
|
D |
| 2728 |
CRYSTAL LAND
IMO 9285146
|
38,981 | 2005 |
5.9
|
D |
| 2729 |
LAGO DI FIASTRA
IMO 9471678
|
37,387 | 2013 |
5.9
|
D |
| 2730 |
TS FLOWER
IMO 9719379
|
38,852 | 2017 |
5.9
|
D |
| 2731 |
AK MILANA
IMO 9251080
|
32,744 | 2002 |
5.9
|
D |
| 2732 |
GABRIELLA
IMO 9522908
|
36,892 | 2013 |
5.9
|
D |
| 2733 |
ULTRA OSORNO
IMO 9820996
|
37,883 | 2018 |
5.9
|
D |
| 2734 |
BIRGIT
IMO 9965655
|
39,988 | 2024 |
5.9
|
D |
| 2735 |
KASHKAR
IMO 9285029
|
38,890 | 2005 |
5.9
|
D |
| 2736 |
NORDIC LUEBECK
IMO 9607459
|
34,236 | 2013 |
5.9
|
D |
| 2737 |
V UNO
IMO 9698214
|
37,888 | 2015 |
5.9
|
D |
| 2738 |
FEDERAL SEVERN
IMO 9606821
|
37,169 | 2012 |
5.9
|
D |
| 2739 |
CLIPPER MALLORCA
IMO 1047122
|
40,313 | 2025 |
5.9
|
D |
| 2740 |
ELIAS
IMO 9490777
|
58,000 | 2010 |
5.9
|
D |
| 2741 |
RIVER CONFIDENCE
IMO 9672222
|
34,393 | 2015 |
5.9
|
D |
| 2742 |
ISTANBUL-M
IMO 9450818
|
36,000 | 2010 |
5.9
|
D |
| 2743 |
PUNTA
IMO 9606118
|
52,000 | 2013 |
5.9
|
D |
| 2744 |
LUCA
IMO 9166211
|
31,764 | 1998 |
5.9
|
D |
| 2745 |
VERUDA
IMO 9585546
|
52,000 | 2011 |
5.9
|
D |
| 2746 |
BEIRA
IMO 9753301
|
40,145 | 2017 |
5.9
|
D |
| 2747 |
HANDY INCLUSIVITY
IMO 9951800
|
37,770 | 2015 |
5.9
|
D |
| 2748 |
ATLANTIC ISLAND
IMO 9628245
|
33,680 | 2012 |
5.9
|
D |
| 2749 |
HAMBURG TEAM
IMO 9855460
|
39,493 | 2019 |
5.9
|
D |
| 2750 |
MABROKAH
IMO 9163489
|
45,572 | 1997 |
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 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.