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 |
|---|---|---|---|---|---|
| 3151 |
GOLDEN EMAN
IMO 9576014
|
30,347 | 2010 |
7.0
|
E |
| 3152 |
AGIA EKATERINI
IMO 9561904
|
29,092 | 2011 |
7.0
|
E |
| 3153 |
BALTIC BAY
IMO 9761889
|
37,384 | 2018 |
7.0
|
E |
| 3154 |
AK HALIMA
IMO 9217826
|
23,677 | 2000 |
7.0
|
E |
| 3155 |
NICOS TOMASOS
IMO 9698800
|
63,038 | 2015 |
7.0
|
E |
| 3156 |
HELI
IMO 9609677
|
37,452 | 2012 |
7.0
|
E |
| 3157 |
SCIO SPIRIT
IMO 9502738
|
35,253 | 2009 |
7.0
|
E |
| 3158 |
SIGMA TRADER
IMO 9486568
|
37,302 | 2010 |
7.0
|
E |
| 3159 |
AGIA DYNAMI
IMO 9502764
|
34,292 | 2010 |
7.0
|
E |
| 3160 |
MATROZOS
IMO 9586320
|
33,002 | 2010 |
7.0
|
E |
| 3161 |
MONEGASQUE EPEE
IMO 9701011
|
33,190 | 2015 |
7.1
|
E |
| 3162 |
ALYCIA
IMO 9588366
|
35,058 | 2012 |
7.1
|
E |
| 3163 |
OCEAN GLORY
IMO 9278648
|
35,552 | 2003 |
7.1
|
E |
| 3164 |
ENTERPRISE
IMO 9522934
|
36,490 | 2011 |
7.1
|
E |
| 3165 |
WADI TIBA
IMO 9460746
|
80,469 | 2011 |
7.1
|
E |
| 3166 |
AMALEA
IMO 9470818
|
28,451 | 2008 |
7.1
|
E |
| 3167 |
YC FORTITUDE
IMO 9587178
|
32,480 | 2011 |
7.1
|
E |
| 3168 |
POAVOSA WISDOM VIII
IMO 9641924
|
28,208 | 2013 |
7.1
|
E |
| 3169 |
SMEW
IMO 9688843
|
35,998 | 2014 |
7.1
|
E |
| 3170 |
ATLANTIC ADAM
IMO 9384863
|
28,510 | 2007 |
7.1
|
E |
| 3171 |
DAIWAN HERO
IMO 9709336
|
34,376 | 2016 |
7.1
|
E |
| 3172 |
KOTRAG
IMO 9503287
|
57,000 | 2012 |
7.1
|
E |
| 3173 |
SEASTAR VULCAN
IMO 9681900
|
39,810 | 2015 |
7.1
|
E |
| 3174 |
REDHEAD
IMO 9413901
|
29,724 | 2010 |
7.1
|
E |
| 3175 |
LADY ZANDAVI
IMO 9573969
|
28,374 | 2011 |
7.1
|
E |
| 3176 |
ABIGAIL
IMO 9642215
|
61,396 | 2013 |
7.1
|
E |
| 3177 |
ANTARCTIC OCEAN
IMO 9467627
|
36,009 | 2010 |
7.1
|
E |
| 3178 |
OSOGOVO
IMO 9498250
|
30,693 | 2011 |
7.1
|
E |
| 3179 |
IRMGARD
IMO 9590967
|
38,167 | 2012 |
7.1
|
E |
| 3180 |
DVADESETPRVI MAJ
IMO 9582427
|
34,990 | 2012 |
7.1
|
E |
| 3181 |
SEA MOON
IMO 9228227
|
28,494 | 2002 |
7.1
|
E |
| 3182 |
SAGITTARIUS
IMO 9550254
|
28,508 | 2010 |
7.1
|
E |
| 3183 |
CLIPPER MEDWAY
IMO 9587221
|
34,061 | 2011 |
7.1
|
E |
| 3184 |
OS KANO 35
IMO 9174505
|
35,360 | 1998 |
7.1
|
E |
| 3185 |
TAO BRAVE
IMO 9487586
|
25,065 | 2011 |
7.1
|
E |
| 3186 |
MBEYA
IMO 9504944
|
23,127 | 2008 |
7.1
|
E |
| 3187 |
SEA HORSE
IMO 9528029
|
32,525 | 2011 |
7.1
|
E |
| 3188 |
STRADION
IMO 9522922
|
36,868 | 2011 |
7.2
|
E |
| 3189 |
CAPE DOUKATO
IMO 9717254
|
28,230 | 2014 |
7.2
|
E |
| 3190 |
EAGLE TRADER
IMO 9284362
|
27,074 | 2004 |
7.2
|
E |
| 3191 |
CELESTE
IMO 9588419
|
34,295 | 2012 |
7.2
|
E |
| 3192 |
K SUKRET
IMO 9571442
|
33,814 | 2014 |
7.2
|
E |
| 3193 |
SOLANA S
IMO 9624330
|
28,401 | 2012 |
7.2
|
E |
| 3194 |
INA-LOTTE
IMO 9574030
|
38,267 | 2010 |
7.2
|
E |
| 3195 |
HONGLI 8
IMO 9659933
|
35,000 | 2012 |
7.2
|
E |
| 3196 |
AFRICAN LILY
IMO 9666443
|
28,340 | 2015 |
7.2
|
E |
| 3197 |
FJORDNES
IMO 9880855
|
40,693 | 2021 |
7.2
|
E |
| 3198 |
SOUTHERN CROSS
IMO 9606027
|
37,085 | 2014 |
7.2
|
E |
| 3199 |
PIGMI
IMO 9470571
|
33,918 | 2011 |
7.2
|
E |
| 3200 |
NJ EARTH
IMO 9229996
|
37,180 | 2003 |
7.2
|
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.