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 |
|---|---|---|---|---|---|
| 3301 |
GOLDEN MALAK
IMO 9578995
|
30,361 | 2010 |
7.6
|
E |
| 3302 |
DELTA
IMO 9595395
|
35,147 | 2012 |
7.6
|
E |
| 3303 |
KOCATEPE S
IMO 9470143
|
16,988 | 2008 |
7.6
|
E |
| 3304 |
MARIS WHISPER
IMO 9437517
|
32,688 | 2009 |
7.7
|
E |
| 3305 |
BERNIS
IMO 9498298
|
35,995 | 2011 |
7.7
|
E |
| 3306 |
DENIZ M
IMO 9450703
|
37,983 | 2007 |
7.7
|
E |
| 3307 |
LILA INCHEON
IMO 9571272
|
32,401 | 2010 |
7.7
|
E |
| 3308 |
V UNO
IMO 9698214
|
37,888 | 2015 |
7.7
|
E |
| 3309 |
STAMFORD PIONEER
IMO 9636943
|
32,211 | 2012 |
7.7
|
E |
| 3310 |
ITHACA PATIENCE
IMO 9550199
|
28,349 | 2010 |
7.7
|
E |
| 3311 |
BLUEBILL
IMO 9263306
|
37,332 | 2004 |
7.7
|
E |
| 3312 |
RACOON
IMO 9597989
|
32,519 | 2011 |
7.7
|
E |
| 3313 |
MAJESTIC VERA
IMO 9474230
|
34,999 | 2011 |
7.7
|
E |
| 3314 |
PACIFIC OCEAN
IMO 9467562
|
36,009 | 2011 |
7.7
|
E |
| 3315 |
COMMANDER K
IMO 9650494
|
35,207 | 2012 |
7.7
|
E |
| 3316 |
AETERNO
IMO 9474228
|
34,954 | 2011 |
7.7
|
E |
| 3317 |
CLIPPER CLYDE
IMO 9455911
|
31,639 | 2012 |
7.7
|
E |
| 3318 |
ATHOS
IMO 9320336
|
30,618 | 2007 |
7.7
|
E |
| 3319 |
DSM EVERTON
IMO 9250701
|
32,474 | 2002 |
7.7
|
E |
| 3320 |
MIEDWIE
IMO 9393448
|
30,481 | 2010 |
7.8
|
E |
| 3321 |
DSM LONDON
IMO 9481946
|
36,489 | 2010 |
7.8
|
E |
| 3322 |
MOTTLER
IMO 9477828
|
30,807 | 2009 |
7.8
|
E |
| 3323 |
JULIETTE
IMO 9459113
|
34,398 | 2012 |
7.8
|
E |
| 3324 |
LU YANG SHUN
IMO 9634880
|
29,061 | 2012 |
7.8
|
E |
| 3325 |
SAINT VASSILIOS
IMO 9486403
|
33,889 | 2007 |
7.8
|
E |
| 3326 |
SAFI FORTUNE
IMO 9550321
|
28,467 | 2009 |
7.8
|
E |
| 3327 |
ZEYNEP KIRAN
IMO 9015577
|
29,330 | 2001 |
7.8
|
E |
| 3328 |
MJ MASSA
IMO 9224867
|
29,944 | 2002 |
7.8
|
E |
| 3329 |
AMIRA SARA
IMO 9691503
|
28,339 | 2014 |
7.8
|
E |
| 3330 |
YANGTZE DIGNITY
IMO 9584217
|
32,414 | 2012 |
7.8
|
E |
| 3331 |
LILLY BOLTEN
IMO 9406063
|
30,765 | 2009 |
7.8
|
E |
| 3332 |
CINNAMON
IMO 9239800
|
26,737 | 2003 |
7.8
|
E |
| 3333 |
RUDDY
IMO 9459981
|
30,930 | 2009 |
7.8
|
E |
| 3334 |
GOKOVA-M
IMO 9243526
|
52,512 | 2002 |
7.8
|
E |
| 3335 |
SPRING SEA
IMO 9639751
|
35,280 | 2013 |
7.8
|
E |
| 3336 |
VEGA DABLAM
IMO 9643790
|
35,000 | 2011 |
7.8
|
E |
| 3337 |
RED LION
IMO 9159062
|
26,566 | 1997 |
7.8
|
E |
| 3338 |
DU AN CHENG
IMO 9484039
|
31,775 | 2011 |
7.8
|
E |
| 3339 |
LV DAISY
IMO 9597991
|
32,580 | 2011 |
7.8
|
E |
| 3340 |
SEA BRIDLE
IMO 9047001
|
26,446 | 1993 |
7.8
|
E |
| 3341 |
BAM ARION
IMO 9414450
|
30,000 | 2012 |
7.8
|
E |
| 3342 |
GRANDMA LILA
IMO 9450820
|
34,372 | 2011 |
7.8
|
E |
| 3343 |
LUBIE
IMO 9441984
|
30,210 | 2011 |
7.8
|
E |
| 3344 |
VEGA EVEREST
IMO 9602693
|
35,304 | 2011 |
7.8
|
E |
| 3345 |
SEAGLASS II
IMO 9498925
|
29,124 | 2008 |
7.8
|
E |
| 3346 |
ALEA
IMO 9550266
|
28,319 | 2009 |
7.8
|
E |
| 3347 |
ZOI
IMO 9608697
|
32,178 | 2012 |
7.9
|
E |
| 3348 |
LOUISA BOLTEN
IMO 9406049
|
30,765 | 2009 |
7.9
|
E |
| 3349 |
SC DALLAS
IMO 9587180
|
32,318 | 2011 |
7.9
|
E |
| 3350 |
ORIENT PRIDE
IMO 9450739
|
34,402 | 2010 |
7.9
|
E |
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.