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 |
|---|---|---|---|---|---|
| 2401 |
FEDERAL SATSUKI
IMO 9515101
|
35,885 | 2012 |
5.4
|
D |
| 2402 |
DENSA SEAL
IMO 9649110
|
37,586 | 2011 |
5.4
|
D |
| 2403 |
BAO RI LING
IMO 9604225
|
47,455 | 2013 |
5.4
|
D |
| 2404 |
DESERT VICTORY
IMO 9543706
|
57,434 | 2011 |
5.4
|
D |
| 2405 |
FEI PU
IMO 9650470
|
56,466 | 2013 |
5.4
|
D |
| 2406 |
UNI BULKER
IMO 9731808
|
37,675 | 2016 |
5.4
|
D |
| 2407 |
HINOKI
IMO 9460332
|
53,549 | 2008 |
5.4
|
D |
| 2408 |
YANGTZE LEGEND
IMO 9706827
|
39,172 | 2015 |
5.4
|
D |
| 2409 |
FEDERAL SAKURA
IMO 9288291
|
32,550 | 2005 |
5.4
|
D |
| 2410 |
ECE NUR BAYRAKTAR
IMO 9480473
|
58,449 | 2007 |
5.4
|
D |
| 2411 |
YASA KYOTO
IMO 9948267
|
37,396 | 2023 |
5.4
|
D |
| 2412 |
DAI SHAN HAI
IMO 9456446
|
54,826 | 2010 |
5.4
|
D |
| 2413 |
COPENHAGEN BULKER
IMO 9831490
|
39,511 | 2018 |
5.4
|
D |
| 2414 |
TBC PASSION
IMO 9594389
|
38,215 | 2011 |
5.4
|
D |
| 2415 |
MINA LONDON
IMO 9489974
|
36,519 | 2010 |
5.4
|
D |
| 2416 |
FEDERAL HAMILTON
IMO 9975363
|
34,763 | 2023 |
5.4
|
D |
| 2417 |
AMBER LAGOON
IMO 9663738
|
39,202 | 2015 |
5.4
|
D |
| 2418 |
SEA EAGLE
IMO 9830135
|
40,079 | 2019 |
5.4
|
D |
| 2419 |
AMARILLO
IMO 9180011
|
28,545 | 1997 |
5.4
|
D |
| 2420 |
STAR PEGASUS
IMO 9621780
|
56,540 | 2013 |
5.4
|
D |
| 2421 |
JAMAICA BAY
IMO 9610717
|
37,633 | 2013 |
5.4
|
D |
| 2422 |
LAN BAO HAI
IMO 9738105
|
39,779 | 2015 |
5.4
|
D |
| 2423 |
MAI TAI
IMO 9709221
|
38,792 | 2015 |
5.4
|
D |
| 2424 |
GLOBE PEGASUS
IMO 9403188
|
58,787 | 2008 |
5.4
|
D |
| 2425 |
ESMERALDA
IMO 9430856
|
55,582 | 2009 |
5.4
|
D |
| 2426 |
MARIGOULA
IMO 9617662
|
58,000 | 2013 |
5.4
|
D |
| 2427 |
SYNVAL
IMO 9763708
|
37,976 | 2016 |
5.4
|
D |
| 2428 |
JNS LAKE
IMO 1039357
|
40,489 | 2024 |
5.4
|
D |
| 2429 |
AKSON SERIN
IMO 9275311
|
48,821 | 2004 |
5.4
|
D |
| 2430 |
ROSTRUM SINGAPORE
IMO 9983217
|
40,000 | 2024 |
5.4
|
D |
| 2431 |
ES INTEGRITY
IMO 9736963
|
34,512 | 2015 |
5.4
|
D |
| 2432 |
FEDERAL ASAHI
IMO 9200419
|
36,563 | 2000 |
5.4
|
D |
| 2433 |
AZUL
IMO 9726504
|
63,253 | 2014 |
5.4
|
D |
| 2434 |
SIDER ATHENA
IMO 9657844
|
40,522 | 2013 |
5.4
|
D |
| 2435 |
AQUITANIA
IMO 9300491
|
55,932 | 2006 |
5.4
|
D |
| 2436 |
CHARIANA L
IMO 9430820
|
55,668 | 2009 |
5.4
|
D |
| 2437 |
PANGEO
IMO 9467873
|
57,000 | 2009 |
5.5
|
D |
| 2438 |
METEORA
IMO 9368845
|
58,740 | 2007 |
5.5
|
D |
| 2439 |
AFRICAN PIPER
IMO 9692777
|
34,302 | 2015 |
5.5
|
D |
| 2440 |
TOMINI SIROCCO
IMO 9711743
|
38,780 | 2013 |
5.5
|
D |
| 2441 |
VESLETS
IMO 9621883
|
36,940 | 2012 |
5.5
|
D |
| 2442 |
ACHILLEAS S.
IMO 9490789
|
58,018 | 2010 |
5.5
|
D |
| 2443 |
DENSA HAWK
IMO 9649093
|
36,746 | 2011 |
5.5
|
D |
| 2444 |
RILA
IMO 9754915
|
44,940 | 2017 |
5.5
|
D |
| 2445 |
NAVIOS CELESTIAL
IMO 9496226
|
58,063 | 2009 |
5.5
|
D |
| 2446 |
KINGFISHER
IMO 9441348
|
57,809 | 2010 |
5.5
|
D |
| 2447 |
KEY OHANA
IMO 9478585
|
55,705 | 2010 |
5.5
|
D |
| 2448 |
ELIZABETH RIVER
IMO 9290892
|
55,955 | 2005 |
5.5
|
D |
| 2449 |
KELLETT ISLAND
IMO 9707625
|
57,836 | 2015 |
5.5
|
D |
| 2450 |
AFRICAN DOVE
IMO 9682772
|
34,402 | 2014 |
5.5
|
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.