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 |
|---|---|---|---|---|---|
| 2351 |
STRATEGIC SPIRIT
IMO 9626388
|
37,194 | 2012 |
5.3
|
D |
| 2352 |
SEA DANA
IMO 9433547
|
56,780 | 2009 |
5.3
|
D |
| 2353 |
CL LINDY
IMO 9720988
|
63,498 | 2017 |
5.3
|
D |
| 2354 |
SINTRA
IMO 9514389
|
56,118 | 2011 |
5.3
|
D |
| 2355 |
SUMATRA
IMO 9753260
|
38,943 | 2016 |
5.3
|
D |
| 2356 |
AFRICAN CROW
IMO 9690884
|
39,836 | 2015 |
5.3
|
D |
| 2357 |
SEAMASTER
IMO 9783655
|
36,962 | 2015 |
5.3
|
D |
| 2358 |
VIGOROUS
IMO 9546239
|
36,204 | 2013 |
5.3
|
D |
| 2359 |
SEABIRD
IMO 9707687
|
63,553 | 2016 |
5.3
|
D |
| 2360 |
TANZANITE
IMO 9456147
|
56,835 | 2010 |
5.3
|
D |
| 2361 |
ALLEGRA
IMO 1014840
|
40,005 | 2024 |
5.3
|
D |
| 2362 |
FEDERAL FREEDOM
IMO 9866756
|
34,492 | 2021 |
5.3
|
D |
| 2363 |
SETO HARMONY
IMO 9881160
|
39,943 | 2020 |
5.3
|
D |
| 2364 |
ANDALUCIA
IMO 9667576
|
37,500 | 2013 |
5.3
|
D |
| 2365 |
CS SONOMA
IMO 9569944
|
56,704 | 2010 |
5.3
|
D |
| 2366 |
LMZ ARIEL
IMO 9632818
|
56,418 | 2012 |
5.3
|
D |
| 2367 |
ABILENE
IMO 9723057
|
63,127 | 2017 |
5.3
|
D |
| 2368 |
GUTIAN TRUST
IMO 9254733
|
55,180 | 2003 |
5.3
|
D |
| 2369 |
KP ALBATROSS
IMO 9552367
|
58,743 | 2010 |
5.3
|
D |
| 2370 |
TRINITY
IMO 9545716
|
56,720 | 2010 |
5.3
|
D |
| 2371 |
S-BRILLIANT
IMO 9275323
|
48,821 | 2004 |
5.3
|
D |
| 2372 |
MANDARIN EAGLE
IMO 9478157
|
56,882 | 2008 |
5.3
|
D |
| 2373 |
BEN 1
IMO 9703813
|
37,857 | 2015 |
5.3
|
D |
| 2374 |
MOONDANCE II
IMO 9316191
|
55,566 | 2005 |
5.3
|
D |
| 2375 |
MANDARIN SINGAPORE
IMO 9569968
|
56,723 | 2011 |
5.4
|
D |
| 2376 |
AGIA IOANNA
IMO 9544138
|
38,173 | 2012 |
5.4
|
D |
| 2377 |
TAMARACK
IMO 9261970
|
50,344 | 2003 |
5.4
|
D |
| 2378 |
GARDENIA K
IMO 9675559
|
38,067 | 2014 |
5.4
|
D |
| 2379 |
LB EARTH
IMO 9644548
|
70,578 | 2012 |
5.4
|
D |
| 2380 |
FEDERAL THUNDER BAY
IMO 9975375
|
34,763 | 2023 |
5.4
|
D |
| 2381 |
CRESTY
IMO 9637143
|
35,977 | 2014 |
5.4
|
D |
| 2382 |
MILIN KAMAK
IMO 9841641
|
47,087 | 2020 |
5.4
|
D |
| 2383 |
ANNA-BARBARA
IMO 9407500
|
55,726 | 2008 |
5.4
|
D |
| 2384 |
SFL KATE
IMO 9615676
|
56,798 | 2011 |
5.4
|
D |
| 2385 |
QUEEN VIVIAN
IMO 9331763
|
53,270 | 2023 |
5.4
|
D |
| 2386 |
DESERT SPRING
IMO 9543768
|
57,437 | 2012 |
5.4
|
D |
| 2387 |
STRATEGIC HARMONY
IMO 9689897
|
39,880 | 2014 |
5.4
|
D |
| 2388 |
FEDERAL CHAMPLAIN
IMO 9671058
|
34,564 | 2016 |
5.4
|
D |
| 2389 |
ROOSTER
IMO 9723942
|
37,896 | 2016 |
5.4
|
D |
| 2390 |
GANNET BULKER
IMO 9441300
|
57,809 | 2010 |
5.4
|
D |
| 2391 |
XIN HAI TONG 53
IMO 9632301
|
56,620 | 2013 |
5.4
|
D |
| 2392 |
SOZON
IMO 9401922
|
50,779 | 2010 |
5.4
|
D |
| 2393 |
CHICAGO HARMONY
IMO 9755696
|
38,485 | 2015 |
5.4
|
D |
| 2394 |
ST MICHAEL
IMO 9972529
|
40,522 | 2024 |
5.4
|
D |
| 2395 |
SHAKESPEARE BAY
IMO 9542661
|
33,256 | 2011 |
5.4
|
D |
| 2396 |
MANDARIN PHOENIX
IMO 9533347
|
56,891 | 2010 |
5.4
|
D |
| 2397 |
MINOAN SKY
IMO 9422328
|
75,118 | 2008 |
5.4
|
D |
| 2398 |
DESERT VICTORY
IMO 9543706
|
57,434 | 2011 |
5.4
|
D |
| 2399 |
FEDERAL SATSUKI
IMO 9515101
|
35,885 | 2012 |
5.4
|
D |
| 2400 |
DENSA SEAL
IMO 9649110
|
37,586 | 2011 |
5.4
|
D |
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.