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 |
|---|---|---|---|---|---|
| 1697 |
OKOLCHITSA
IMO 9841653
|
47,087 | 2020 |
4.5
|
C |
| 1702 |
KIAN
IMO 9890240
|
37,391 | 2021 |
4.5
|
C |
| 1703 |
CYPRESS ARROW
IMO 9720067
|
61,022 | 2015 |
4.5
|
C |
| 1705 |
SARONIC CHAMPION
IMO 9453523
|
93,115 | 2011 |
4.5
|
C |
| 1704 |
FENG XIU HAI
IMO 9747508
|
63,408 | 2016 |
4.5
|
C |
| 1709 |
ARUNA CIHAN
IMO 9543756
|
57,411 | 2011 |
4.5
|
C |
| 1708 |
LAKE GRASSMERE
IMO 9942005
|
40,177 | 2023 |
4.5
|
C |
| 1707 |
LETIZIA OETKER
IMO 9731717
|
61,288 | 2015 |
4.5
|
C |
| 1706 |
FORTUNE TIGER
IMO 9558282
|
58,159 | 2013 |
4.5
|
C |
| 1711 |
XIN YU
IMO 9244362
|
74,090 | 2001 |
4.5
|
C |
| 1713 |
GLAFKOS
IMO 9696448
|
63,519 | 2016 |
4.5
|
C |
| 1710 |
FEDERAL TAMBO
IMO 9644495
|
55,160 | 2013 |
4.5
|
C |
| 1716 |
PATRICIA V
IMO 9453054
|
75,354 | 2010 |
4.5
|
C |
| 1715 |
IOANNIS
IMO 9760158
|
60,402 | 2016 |
4.5
|
C |
| 1714 |
OLIVIA
IMO 9973535
|
40,010 | 2024 |
4.5
|
C |
| 1719 |
TERN BULKER
IMO 9676101
|
57,896 | 2014 |
4.5
|
C |
| 1718 |
ATHINA L
IMO 9487627
|
81,358 | 2011 |
4.5
|
C |
| 1717 |
DANAE
IMO 9926271
|
40,015 | 2022 |
4.5
|
C |
| 1712 |
LENI
IMO 9362982
|
77,008 | 2008 |
4.5
|
C |
| 1720 |
ARTEMISSIO
IMO 9762364
|
63,505 | 2017 |
4.5
|
C |
| 1721 |
AFRICAN HORNBILL
IMO 9599779
|
61,440 | 2011 |
4.5
|
C |
| 1725 |
KANSU
IMO 9860283
|
37,440 | 2021 |
4.5
|
C |
| 1724 |
BULK SACHUEST
IMO 9483231
|
55,618 | 2010 |
4.5
|
C |
| 1723 |
LEFKADA
IMO 9767546
|
37,951 | 2016 |
4.5
|
C |
| 1722 |
SEAHARMONY
IMO 9688635
|
62,770 | 2015 |
4.5
|
C |
| 1728 |
LIBRA-XS
IMO 9282742
|
52,441 | 2003 |
4.5
|
C |
| 1727 |
MINOAN DIGNITY
IMO 9294484
|
76,801 | 2004 |
4.5
|
C |
| 1726 |
FURNESS VICTORIA
IMO 9640621
|
58,648 | 2012 |
4.5
|
C |
| 1731 |
ECO CZAR
IMO 9340556
|
82,372 | 2009 |
4.5
|
C |
| 1730 |
GEORGIA S
IMO 9502647
|
75,081 | 2011 |
4.5
|
C |
| 1729 |
CORAL VI
IMO 9464405
|
76,596 | 2008 |
4.5
|
C |
| 1735 |
DESTINY
IMO 9385491
|
54,204 | 2009 |
4.6
|
C |
| 1734 |
SANTOS EAGLE
IMO 9699347
|
63,537 | 2015 |
4.6
|
C |
| 1736 |
JOKER
IMO 9448578
|
57,982 | 2012 |
4.6
|
C |
| 1733 |
FEDERAL CLYDE
IMO 9671072
|
34,564 | 2016 |
4.6
|
C |
| 1732 |
BULK BAHAMAS
IMO 9514315
|
56,141 | 2012 |
4.6
|
C |
| 1748 |
GLORIOUS
IMO 9729831
|
63,338 | 2014 |
4.6
|
C |
| 1749 |
BIRD OF PARADISE
IMO 1014618
|
40,259 | 2024 |
4.6
|
C |
| 1745 |
ANANI
IMO 9711432
|
61,631 | 2015 |
4.6
|
C |
| 1747 |
CAPE GRECO
IMO 9481477
|
79,452 | 2011 |
4.6
|
C |
| 1746 |
BONITA
IMO 9231286
|
76,623 | 2001 |
4.6
|
C |
| 1744 |
ACHI
IMO 9575137
|
63,301 | 2012 |
4.6
|
C |
| 1742 |
MENOMONEE
IMO 9730256
|
58,595 | 2016 |
4.6
|
C |
| 1743 |
ELENA VE
IMO 9453066
|
69,999 | 2010 |
4.6
|
C |
| 1741 |
MARKET PORTER
IMO 9852913
|
61,208 | 2015 |
4.6
|
C |
| 1740 |
QING PING SHAN
IMO 9741504
|
63,474 | 2015 |
4.6
|
C |
| 1739 |
ARIES SAKURA
IMO 9881146
|
39,870 | 2020 |
4.6
|
C |
| 1738 |
EVANGELISTRIA
IMO 9383857
|
75,844 | 2008 |
4.6
|
C |
| 1737 |
KYRA PANAGHIA
IMO 9647277
|
63,351 | 2012 |
4.6
|
C |
| 1750 |
TAXIDIARA
IMO 9331919
|
56,049 | 2007 |
4.6
|
C |
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.