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 |
|---|---|---|---|---|---|
| 3251 |
LADY DIMINE
IMO 9573957
|
28,316 | 2010 |
7.4
|
E |
| 3252 |
DELOS II
IMO 9612375
|
35,898 | 2013 |
7.4
|
E |
| 3253 |
ITALIDA
IMO 9522817
|
28,509 | 2009 |
7.4
|
E |
| 3254 |
LONDON BAY
IMO 9286944
|
29,727 | 2004 |
7.4
|
E |
| 3255 |
HELGA
IMO 9444912
|
28,358 | 2008 |
7.4
|
E |
| 3256 |
KINGFISHER D
IMO 9238117
|
28,425 | 2002 |
7.4
|
E |
| 3257 |
SEASTAR TROJAN
IMO 9406116
|
30,424 | 2010 |
7.4
|
E |
| 3258 |
ALONISSOS
IMO 9566916
|
56,648 | 2010 |
7.4
|
E |
| 3259 |
VISBY
IMO 9563380
|
35,083 | 2006 |
7.4
|
E |
| 3260 |
KOTOR
IMO 9575981
|
35,000 | 2012 |
7.4
|
E |
| 3261 |
LAMBI
IMO 9595254
|
33,221 | 2012 |
7.4
|
E |
| 3262 |
AMARELLA
IMO 9502829
|
35,212 | 2011 |
7.4
|
E |
| 3263 |
SYROS TRADER
IMO 9395214
|
43,100 | 2008 |
7.4
|
E |
| 3264 |
ARKI
IMO 9561801
|
30,271 | 2011 |
7.4
|
E |
| 3265 |
APOGEE ENDEAVOUR
IMO 9553141
|
28,341 | 2009 |
7.4
|
E |
| 3266 |
STARNES
IMO 9858424
|
40,742 | 2020 |
7.4
|
E |
| 3267 |
VERUDA
IMO 9585546
|
52,000 | 2011 |
7.4
|
E |
| 3268 |
NAVI MOON
IMO 9385154
|
32,162 | 2008 |
7.4
|
E |
| 3269 |
SOLARIS
IMO 9474266
|
34,961 | 2011 |
7.4
|
E |
| 3270 |
OCCITAN PAUILLAC
IMO 9483451
|
29,231 | 2008 |
7.5
|
E |
| 3271 |
TS HONOUR
IMO 9719393
|
38,805 | 2017 |
7.5
|
E |
| 3272 |
POAVOSA WISDOM VII
IMO 9633276
|
28,208 | 2012 |
7.5
|
E |
| 3273 |
MADRID
IMO 9647887
|
30,912 | 2013 |
7.5
|
E |
| 3274 |
JAGUAR 1
IMO 9244087
|
20,001 | 2003 |
7.5
|
E |
| 3275 |
ECO ANGELBAY
IMO 9385166
|
32,165 | 2009 |
7.5
|
E |
| 3276 |
TRONA
IMO 9326304
|
18,830 | 2005 |
7.5
|
E |
| 3277 |
BLUE STAR
IMO 9579327
|
37,947 | 2011 |
7.5
|
E |
| 3278 |
SWEET JUDI
IMO 9502843
|
35,238 | 2012 |
7.5
|
E |
| 3279 |
AFRICAN HHB
IMO 9666429
|
28,358 | 2015 |
7.5
|
E |
| 3280 |
NAZENIN
IMO 9545508
|
35,957 | 2010 |
7.5
|
E |
| 3281 |
WESTERN BOHEME
IMO 9609691
|
37,000 | 2012 |
7.5
|
E |
| 3282 |
PRINCE ZAIN
IMO 9276731
|
29,738 | 2003 |
7.5
|
E |
| 3283 |
REVENGER
IMO 9467548
|
35,070 | 2009 |
7.5
|
E |
| 3284 |
GOLDEN ARSENAL
IMO 9493212
|
28,221 | 2011 |
7.5
|
E |
| 3285 |
HUA YANG MEI GUI
IMO 9497490
|
30,035 | 2011 |
7.5
|
E |
| 3286 |
ORIENT TIDE
IMO 9467550
|
36,009 | 2010 |
7.5
|
E |
| 3287 |
AMK NOBLE
IMO 9557238
|
32,449 | 2010 |
7.5
|
E |
| 3288 |
BRIGHT STAR
IMO 9481960
|
36,471 | 2011 |
7.5
|
E |
| 3289 |
PENA MED
IMO 9667057
|
35,729 | 2019 |
7.5
|
E |
| 3290 |
RUBATO
IMO 9487550
|
25,159 | 2010 |
7.5
|
E |
| 3291 |
THALIS
IMO 9616747
|
37,189 | 2012 |
7.5
|
E |
| 3292 |
SEAHORSE
IMO 9594456
|
32,962 | 2012 |
7.5
|
E |
| 3293 |
ODYSSEAS
IMO 9595187
|
37,138 | 2011 |
7.5
|
E |
| 3294 |
GANT FLAIR
IMO 9554066
|
28,339 | 2010 |
7.5
|
E |
| 3295 |
CAPE SCOTT
IMO 9159737
|
28,747 | 1997 |
7.5
|
E |
| 3296 |
AKSON SANDRA
IMO 9537264
|
38,406 | 2010 |
7.6
|
E |
| 3297 |
HADEEL
IMO 9406087
|
30,420 | 2010 |
7.6
|
E |
| 3298 |
NEW COMMANDER
IMO 9610652
|
37,187 | 2012 |
7.6
|
E |
| 3299 |
TBC PRAISE
IMO 9595151
|
36,699 | 2012 |
7.6
|
E |
| 3300 |
DELTA
IMO 9595395
|
35,147 | 2012 |
7.6
|
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.