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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.

Segment rank (2025)
#3,009 of 3,436 bulk carriers
CO₂ intensity
6.6 g CO₂/dwt·nm
vs segment average (4.71)
+40% higher
E
Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo
Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates
Size (DWT)
All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT
Year
2025 2024
3,507
vessels ranked
1.74
greenest (g CO₂/t·nm)
4.46
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
3001 ASTRO ORION
IMO 9767326
 37,347 2017
6.6
E
3002 STRATEGIC SAVANNAH
IMO 9686338
 35,542 2013
6.6
E
3003 SEAHOPE
IMO 9598294
 32,922 2012
6.6
E
3004 AUTUMN SEA
IMO 9639775
 35,244 2013
6.6
E
3005 BARNACLE
IMO 9409742
 30,803 2009
6.6
E
3006 BLUEBILL
IMO 9263306
 37,332 2004
6.6
E
3007 ORCINUS
IMO 9467952
 34,094 2010
6.6
E
3008 AURORA TRADER
IMO 9595967
 37,019 2012
6.6
E
3009 CETUS OMURA
IMO 9670781
 43,532 2016
6.6
E
3010 MEL GRACE
IMO 9590955
 38,225 2011
6.6
E
3011 ALANDA STAR
IMO 9189677
 31,828 1999
6.6
E
3012 HELENA G
IMO 9358383
 37,251 2007
6.6
E
3013 ABK LEGEND
IMO 9238674
 30,039 2002
6.6
E
3014 STRATEGIC FORTITUDE
IMO 9753387
 37,829 2016
6.6
E
3015 PUCK
IMO 9594250
 37,930 2012
6.6
E
3016 STRATEGIC EXPLORER
IMO 9723708
 39,880 2015
6.6
E
3017 LONDON BAY
IMO 9286944
 29,727 2004
6.6
E
3018 JAGUAR
IMO 9464948
 36,839 2011
6.6
E
3019 OSLEEN
IMO 9278739
 33,658 2004
6.6
E
3020 REDHEAD
IMO 9413901
 29,724 2010
6.6
E
3021 AGIA DYNAMI
IMO 9502764
 34,292 2010
6.6
E
3022 GOLDEN CITRUS
IMO 9663740
 39,232 2015
6.6
E
3023 ROZTOCZE
IMO 9346835
 38,980 2008
6.6
E
3024 LADY VENEZIA
IMO 9641821
 28,207 2013
6.6
E
3025 MAAS CONFIDENCE
IMO 9713210
 34,914 2016
6.7
E
3026 AMALIA
IMO 9588354
 35,063 2011
6.7
E
3027 BRAVE M
IMO 9153496
 28,404 1998
6.7
E
3028 BABITONGA BAY
IMO 9663776
 39,202 2015
6.7
E
3029 YARA J
IMO 9118147
 34,169 1997
6.7
E
3030 WEST HARMONY
IMO 9665700
 35,534 2012
6.7
E
3031 PHOENICIAN-M
IMO 9450806
 37,973 2010
6.7
E
3032 ACTION TRADER
IMO 9808663
 39,481 2017
6.7
E
3033 K SUKRET
IMO 9571442
 33,814 2014
6.7
E
3034 G PUTUO
IMO 9491238
 56,780 2011
6.7
E
3035 YASA KYOTO
IMO 9948267
 37,396 2023
6.7
E
3036 PODLASIE
IMO 9346811
 38,981 2008
6.7
E
3037 AM PROGRESS
IMO 9489821
 32,306 2012
6.7
E
3038 VIVA COSMOS
IMO 9251327
 52,089 2003
6.7
E
3039 SHIMANAMI STAR
IMO 9377717
 28,447 2006
6.7
E
3040 BELASITZA
IMO 9498262
 30,696 2011
6.7
E
3041 HANDY STRANGER
IMO 9643453
 34,753 2014
6.7
E
3042 DS MANATEE
IMO 9255189
 27,129 2002
6.7
E
3043 CATIVERA
IMO 9172105
 24,154 1998
6.7
E
3044 ARDENNES
IMO 9646699
 36,062 2013
6.7
E
3045 SERENITY
IMO 9606120
 52,000 2016
6.7
E
3046 TAN BINH 345
IMO 9491680
 37,218 2011
6.7
E
3047 GOLDEN ARSENAL
IMO 9493212
 28,221 2011
6.7
E
3048 LILA TOCHIGI
IMO 9683116
 28,354 2014
6.7
E
3049 KEN BREEZE
IMO 9636383
 37,148 2012
6.7
E
3050 ALLEGRA
IMO 9519169
 35,118 2011
6.7
E
Page 61 of 69 — 3,436 vessels
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Engine intelligence

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.

Emission-friendly engine ranking

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.