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 |
|---|---|---|---|---|---|
| 1598 |
JOSCO LANZHOU
IMO 9872470
|
61,323 | 2020 |
4.4
|
C |
| 1597 |
NORD TOKYO
IMO 9959448
|
40,024 | 2023 |
4.4
|
C |
| 1596 |
SSI GLORIOUS
IMO 9595955
|
56,733 | 2012 |
4.4
|
C |
| 1604 |
KINLING
IMO 9893814
|
37,391 | 2022 |
4.4
|
C |
| 1608 |
LOLITA
IMO 1014979
|
40,420 | 2024 |
4.4
|
C |
| 1610 |
BBG MASTER
IMO 9721982
|
63,650 | 2016 |
4.4
|
C |
| 1607 |
TOKYO PIONEER
IMO 9856294
|
63,686 | 2020 |
4.4
|
C |
| 1606 |
BRIGITTE
IMO 9730270
|
59,000 | 2013 |
4.4
|
C |
| 1605 |
GIORGAKIS
IMO 9469510
|
79,791 | 2011 |
4.4
|
C |
| 1609 |
SHENG JI HAI
IMO 9533050
|
56,915 | 2010 |
4.4
|
C |
| 1613 |
EFFY N
IMO 9509516
|
55,804 | 2009 |
4.4
|
C |
| 1612 |
PACIFIC STAR
IMO 9470387
|
74,138 | 2013 |
4.4
|
C |
| 1611 |
EVA LONDON
IMO 9863857
|
63,683 | 2021 |
4.4
|
C |
| 1617 |
ROSSANA
IMO 9696838
|
39,935 | 2016 |
4.4
|
C |
| 1616 |
BULK COURAGEOUS
IMO 9659919
|
61,393 | 2013 |
4.4
|
C |
| 1618 |
DARYA TIANA
IMO 9720316
|
63,491 | 2015 |
4.4
|
C |
| 1615 |
KENNADI
IMO 9703576
|
63,262 | 2016 |
4.4
|
C |
| 1619 |
COURAGEOUS
IMO 9324617
|
52,346 | 2005 |
4.4
|
C |
| 1614 |
BUENA VENTURA I
IMO 9539248
|
83,366 | 2011 |
4.4
|
C |
| 1622 |
KOBE HARMONY
IMO 9926087
|
39,884 | 2022 |
4.4
|
C |
| 1624 |
GREAT INTELLIGENCE
IMO 9800623
|
38,797 | 2017 |
4.4
|
C |
| 1621 |
MERCHIA
IMO 9702493
|
64,000 | 2015 |
4.4
|
C |
| 1632 |
XIN HAI TONG 20
IMO 9534145
|
56,753 | 2009 |
4.4
|
C |
| 1620 |
MANDARIN HANTONG
IMO 9569956
|
56,741 | 2011 |
4.4
|
C |
| 1623 |
PROPEL SHAKTI
IMO 9640592
|
58,642 | 2012 |
4.4
|
C |
| 1631 |
HARTLAUB
IMO 9977957
|
39,600 | 2024 |
4.4
|
C |
| 1630 |
KONSTANTINOS II
IMO 9595278
|
81,698 | 2013 |
4.4
|
C |
| 1629 |
LUYANG SMOOTH
IMO 9538763
|
75,618 | 2011 |
4.4
|
C |
| 1628 |
VIKTOR TSOI
IMO 9609744
|
74,559 | 2013 |
4.4
|
C |
| 1627 |
CLARA
IMO 9389124
|
56,557 | 2008 |
4.4
|
C |
| 1626 |
SAGAR SAMRAT
IMO 9727041
|
76,404 | 2015 |
4.4
|
C |
| 1625 |
SPRING COSMOS
IMO 9666027
|
63,273 | 2014 |
4.4
|
C |
| 1636 |
YUE GUAN FENG
IMO 9523158
|
75,581 | 2010 |
4.4
|
C |
| 1638 |
DESERT CHALLENGER
IMO 9699842
|
61,146 | 2017 |
4.4
|
C |
| 1635 |
NORSE HOUSTON
IMO 9909675
|
40,020 | 2021 |
4.4
|
C |
| 1641 |
ZHONG YUAN
IMO 9576272
|
81,629 | 2011 |
4.4
|
C |
| 1640 |
ANNA-ELISABETH
IMO 9407471
|
55,709 | 2008 |
4.4
|
C |
| 1639 |
SANTA CAROLINA
IMO 9800398
|
61,195 | 2018 |
4.4
|
C |
| 1634 |
AGRAFA
IMO 9947304
|
63,564 | 2024 |
4.4
|
C |
| 1633 |
OCEAN AMBITION
IMO 9883364
|
63,224 | 2020 |
4.4
|
C |
| 1637 |
BARROW ISLAND
IMO 9610743
|
58,044 | 2010 |
4.4
|
C |
| 1650 |
THERESA HEBEI
IMO 9591832
|
81,707 | 2012 |
4.5
|
C |
| 1649 |
ALERCE
IMO 9942043
|
37,967 | 2015 |
4.5
|
C |
| 1648 |
LYCAVITOS
IMO 9368857
|
58,786 | 2007 |
4.5
|
C |
| 1647 |
ASTRO SANISTRA
IMO 9805661
|
60,365 | 2018 |
4.5
|
C |
| 1646 |
STAR LUTAS
IMO 9712709
|
61,347 | 2016 |
4.5
|
C |
| 1645 |
AL MAQAM
IMO 9672040
|
63,155 | 2014 |
4.5
|
C |
| 1644 |
MEDI PERTH
IMO 9804552
|
60,399 | 2017 |
4.5
|
C |
| 1643 |
OCEAN BAY
IMO 9460863
|
58,786 | 2008 |
4.5
|
C |
| 1642 |
AMSTEL TIGER
IMO 9434515
|
60,454 | 2016 |
4.5
|
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.