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 |
|---|---|---|---|---|---|
| 251 |
WORLDSHIP
IMO 9624457
|
181,415 | 2010 |
2.9
|
A |
| 250 |
CAPE SANDRA
IMO 9446908
|
175,459 | 2011 |
2.9
|
A |
| 249 |
AMABIKO
IMO 9971898
|
82,835 | 2023 |
2.9
|
A |
| 255 |
MARSANNE
IMO 9937244
|
82,411 | 2022 |
2.9
|
A |
| 248 |
ATLANTIC DRAGON
IMO 9874600
|
209,170 | 2020 |
2.9
|
A |
| 257 |
LOWLANDS INFINITY
IMO 9965784
|
82,239 | 2024 |
2.9
|
A |
| 256 |
OCEAN LEGEND
IMO 9840673
|
78,208 | 2020 |
2.9
|
A |
| 258 |
MILDRED
IMO 9587386
|
179,678 | 2011 |
2.9
|
A |
| 261 |
BASIC EXPLORER
IMO 9944338
|
82,609 | 2023 |
2.9
|
A |
| 260 |
NAVIOS PHOENIX
IMO 9552276
|
180,242 | 2009 |
2.9
|
A |
| 259 |
JAL TARA
IMO 9860544
|
84,827 | 2019 |
2.9
|
A |
| 262 |
AI STRATIS
IMO 9952426
|
82,176 | 2023 |
2.9
|
A |
| 263 |
SAKIZAYA MIRACLE
IMO 9768019
|
81,668 | 2017 |
2.9
|
A |
| 268 |
PACIFIST
IMO 9573775
|
181,458 | 2011 |
2.9
|
A |
| 267 |
PREMIERSHIP
IMO 9398747
|
170,024 | 2006 |
2.9
|
A |
| 266 |
BEAM
IMO 9591741
|
179,100 | 2011 |
2.9
|
A |
| 265 |
MARAN MARINER
IMO 9439072
|
179,537 | 2011 |
2.9
|
A |
| 264 |
WADI ALARISH
IMO 9952672
|
82,234 | 2024 |
2.9
|
A |
| 269 |
HG SAGUNTO
IMO 9747687
|
63,371 | 2018 |
3.0
|
A |
| 270 |
ORANGE FRIENDSHIP
IMO 9941350
|
82,001 | 2022 |
3.0
|
A |
| 271 |
GREAT FLOURISH
IMO 9988346
|
82,811 | 2024 |
3.0
|
A |
| 273 |
MH PHOENIX BEAUTY
IMO 9455894
|
169,151 | 2010 |
3.0
|
A |
| 272 |
CAPE SUPPLIER
IMO 9493743
|
175,126 | 2011 |
3.0
|
A |
| 274 |
BALBOA
IMO 9952490
|
82,235 | 2024 |
3.0
|
A |
| 275 |
YM THERESA
IMO 9959400
|
82,778 | 2023 |
3.0
|
A |
| 276 |
ASTRO GRUMIUM
IMO 9714719
|
61,305 | 2015 |
3.0
|
A |
| 278 |
JAG ARNAV
IMO 9705354
|
81,732 | 2015 |
3.0
|
A |
| 277 |
NAVIOS MERIDIAN
IMO 9947237
|
82,010 | 2021 |
3.0
|
A |
| 281 |
NAVIOS AMITIE
IMO 9909053
|
82,002 | 2015 |
3.0
|
A |
| 280 |
INCE BOSPHORUS
IMO 9354844
|
82,329 | 2006 |
3.0
|
A |
| 279 |
MAROULIO S
IMO 9493511
|
76,000 | 2010 |
3.0
|
A |
| 284 |
FEI YUN JIANG
IMO 9990820
|
64,725 | 2024 |
3.0
|
A |
| 289 |
CL ZHANJIANG
IMO 9977359
|
64,765 | 2024 |
3.0
|
A |
| 283 |
INDIAN FRIENDSHIP
IMO 9521394
|
181,125 | 2013 |
3.0
|
A |
| 290 |
PENELOPE I
IMO 9762601
|
81,835 | 2017 |
3.0
|
A |
| 282 |
HESSAH
IMO 9837145
|
80,729 | 2020 |
3.0
|
A |
| 288 |
MARAN GLORY
IMO 9434383
|
180,575 | 2012 |
3.0
|
A |
| 287 |
MARIJEANNIE C
IMO 9434565
|
179,759 | 2009 |
3.0
|
A |
| 286 |
NORD TITAN
IMO 9701164
|
77,095 | 2014 |
3.0
|
A |
| 285 |
STAR ELIZABETH
IMO 9917488
|
82,403 | 2021 |
3.0
|
A |
| 292 |
ECHO.GR
IMO 9673836
|
81,070 | 2014 |
3.0
|
A |
| 291 |
SAKIZAYA ZEST
IMO 9913030
|
82,501 | 2022 |
3.0
|
A |
| 293 |
FRONTIER SKY
IMO 9488009
|
179,288 | 2012 |
3.0
|
A |
| 297 |
NAVIOS BUENA VENTURA
IMO 9481233
|
179,108 | 2006 |
3.0
|
A |
| 296 |
LORDSHIP
IMO 9519066
|
178,838 | 2010 |
3.0
|
A |
| 295 |
CSSC IMMINGHAM
IMO 9853929
|
120,613 | 2021 |
3.0
|
A |
| 294 |
ASTRO REGULUS
IMO 9712979
|
60,417 | 2015 |
3.0
|
A |
| 300 |
PETER S
IMO 9104110
|
71,550 | 1995 |
3.0
|
A |
| 299 |
PARTNERSHIP
IMO 9597848
|
179,213 | 2010 |
3.0
|
A |
| 298 |
GOLDEN STAR
IMO 9950703
|
85,000 | 2021 |
3.0
|
A |
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.