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 |
|---|---|---|---|---|---|
| 2501 |
PAN IMPERIAL
IMO 9699361
|
63,567 | 2016 |
5.5
|
D |
| 2502 |
30 AGUSTOS M
IMO 9287209
|
52,667 | 2005 |
5.5
|
D |
| 2503 |
AFRICAN MERLIN
IMO 9701267
|
34,370 | 2013 |
5.5
|
D |
| 2504 |
CAPTAIN D LEMPESIS
IMO 9364801
|
53,466 | 2005 |
5.5
|
D |
| 2505 |
VERILA
IMO 9905734
|
32,165 | 2022 |
5.5
|
D |
| 2506 |
AP REVELIN
IMO 9694696
|
38,700 | 2016 |
5.5
|
D |
| 2507 |
SUPER TOMIYASU
IMO 9621778
|
56,604 | 2013 |
5.5
|
D |
| 2508 |
TRUE FRIEND
IMO 9550668
|
51,241 | 2009 |
5.5
|
D |
| 2509 |
AFRICAN HARRIER
IMO 9700794
|
37,800 | 2014 |
5.5
|
D |
| 2510 |
AFRICAN PLOVER
IMO 9715206
|
39,641 | 2015 |
5.6
|
D |
| 2511 |
OCEANBEAUTY
IMO 9641338
|
56,715 | 2013 |
5.6
|
D |
| 2512 |
MEHMET DADAYLI
IMO 9749984
|
34,484 | 2019 |
5.6
|
D |
| 2513 |
STRATEGIC FORTITUDE
IMO 9753387
|
37,829 | 2016 |
5.6
|
D |
| 2514 |
FEDERAL BERING
IMO 9697832
|
34,564 | 2015 |
5.6
|
D |
| 2515 |
FEDERAL BRISTOL
IMO 9697844
|
34,564 | 2015 |
5.6
|
D |
| 2516 |
ROSTRUM AUSTRALIA
IMO 9941609
|
40,017 | 2023 |
5.6
|
D |
| 2517 |
CAPTAIN KARAM
IMO 9303039
|
56,018 | 2006 |
5.6
|
D |
| 2518 |
DYNAMIC STRIKER
IMO 9493652
|
56,736 | 2010 |
5.6
|
D |
| 2519 |
BALTIC ACE
IMO 9810757
|
33,428 | 2018 |
5.6
|
D |
| 2520 |
WADI SAFAGA
IMO 9460734
|
80,443 | 2010 |
5.6
|
D |
| 2521 |
MAVERICK
IMO 9762493
|
37,845 | 2018 |
5.6
|
D |
| 2522 |
FEDERAL NAGARA
IMO 9805257
|
34,492 | 2018 |
5.6
|
D |
| 2523 |
EGRET BULKER
IMO 9441295
|
57,809 | 2010 |
5.6
|
D |
| 2524 |
SOPHIA Z
IMO 9445708
|
57,285 | 2009 |
5.6
|
D |
| 2525 |
DESERT OASIS
IMO 9543782
|
57,436 | 2012 |
5.6
|
D |
| 2526 |
ACTION TRADER
IMO 9808663
|
39,481 | 2017 |
5.6
|
D |
| 2527 |
VELOCE
IMO 9552836
|
83,410 | 2010 |
5.6
|
D |
| 2528 |
THOR BRAVE
IMO 9474797
|
53,533 | 2012 |
5.6
|
D |
| 2529 |
GOLDEN CITRUS
IMO 9663740
|
39,232 | 2015 |
5.6
|
D |
| 2530 |
NSM ARKADIA
IMO 9590797
|
56,348 | 2012 |
5.6
|
D |
| 2531 |
AC AMITY
IMO 9623116
|
32,752 | 2013 |
5.6
|
D |
| 2532 |
PROPEL PASSION
IMO 9473676
|
33,686 | 2011 |
5.6
|
D |
| 2533 |
FEDERAL ST LAURENT
IMO 9838462
|
34,492 | 2019 |
5.6
|
D |
| 2534 |
ANTIGONI B
IMO 9588512
|
56,928 | 2011 |
5.6
|
D |
| 2535 |
DEFENSE
IMO 9237199
|
53,350 | 2003 |
5.6
|
D |
| 2536 |
NAVI STAR
IMO 9590979
|
38,243 | 2011 |
5.6
|
D |
| 2537 |
CARAVOS TRIUMPH
IMO 9584310
|
81,664 | 2012 |
5.6
|
D |
| 2538 |
ALMERIA
IMO 9592721
|
57,022 | 2011 |
5.6
|
D |
| 2539 |
FEDERAL COLUMBIA
IMO 9671084
|
34,564 | 2016 |
5.6
|
D |
| 2540 |
LAUREL ISLAND
IMO 9801158
|
37,832 | 2017 |
5.6
|
D |
| 2541 |
NORSE ANTWERP
IMO 9909663
|
40,020 | 2021 |
5.6
|
D |
| 2542 |
ULTRA TATIO
IMO 9782986
|
37,927 | 2016 |
5.6
|
D |
| 2543 |
DAIWAN LEADER
IMO 9796535
|
34,442 | 2018 |
5.6
|
D |
| 2544 |
LIMA TRADER
IMO 9500821
|
56,794 | 2012 |
5.6
|
D |
| 2545 |
FABIA SCHULTE
IMO 9697155
|
40,041 | 2015 |
5.6
|
D |
| 2546 |
TQ SAMSUN
IMO 9125566
|
43,775 | 1996 |
5.6
|
D |
| 2547 |
FRIEDERIKE
IMO 9436769
|
57,369 | 2011 |
5.6
|
D |
| 2548 |
BITTERN
IMO 9441269
|
57,809 | 2009 |
5.6
|
D |
| 2549 |
AVIONA
IMO 9592745
|
56,898 | 2011 |
5.6
|
D |
| 2550 |
CHAYANEE NAREE
IMO 9613434
|
56,547 | 2012 |
5.6
|
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.