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 |
|---|---|---|---|---|---|
| 1901 |
ELECTRA
IMO 9661223
|
87,150 | 2013 |
4.8
|
C |
| 1902 |
GALAXY
IMO 9287156
|
52,440 | 2004 |
4.8
|
C |
| 1903 |
TOMINI HARMONY
IMO 9718131
|
63,591 | 2015 |
4.8
|
C |
| 1904 |
WECO KAROLINE
IMO 9803417
|
38,905 | 2020 |
4.8
|
C |
| 1905 |
INDIGO BREEZE
IMO 9760160
|
60,430 | 2017 |
4.8
|
C |
| 1906 |
ALGOMA VALUE
IMO 7926148
|
75,569 | 1981 |
4.8
|
C |
| 1907 |
RODINA
IMO 9968487
|
45,167 | 2024 |
4.8
|
C |
| 1908 |
LOWLANDS HOPE
IMO 9727182
|
60,063 | 2016 |
4.8
|
C |
| 1909 |
DYNAGREEN
IMO 9919527
|
49,480 | 2022 |
4.8
|
C |
| 1910 |
THOR MADOC
IMO 9291389
|
55,695 | 2005 |
4.8
|
C |
| 1911 |
PILION
IMO 9425825
|
58,081 | 2010 |
4.8
|
C |
| 1912 |
ESTRELLA
IMO 9477270
|
50,448 | 2012 |
4.8
|
C |
| 1913 |
TAC ODESSA
IMO 9880116
|
40,313 | 2021 |
4.8
|
C |
| 1914 |
BELLIGHT
IMO 9724776
|
63,073 | 2016 |
4.8
|
C |
| 1915 |
SWEET LADY III
IMO 9316804
|
55,838 | 2006 |
4.8
|
C |
| 1916 |
ANAIS
IMO 9224025
|
76,015 | 2002 |
4.8
|
C |
| 1917 |
ECUADOR L
IMO 9426192
|
57,937 | 2011 |
4.8
|
C |
| 1918 |
MISSION REVIVAL
IMO 9783978
|
57,763 | 2017 |
4.8
|
C |
| 1919 |
YASA ROSE
IMO 9955612
|
40,238 | 2022 |
4.8
|
C |
| 1920 |
ULTRA SILVA
IMO 9873890
|
40,213 | 2021 |
4.8
|
C |
| 1921 |
SPETSES SPIRIT
IMO 9543885
|
80,327 | 2011 |
4.8
|
C |
| 1922 |
PERELIK
IMO 9905722
|
32,169 | 2022 |
4.8
|
C |
| 1923 |
CAPTAIN D
IMO 9744752
|
35,443 | 2016 |
4.8
|
C |
| 1924 |
LMZ PHOEBE
IMO 9599389
|
56,733 | 2011 |
4.8
|
C |
| 1925 |
LIBERTY ISLAND
IMO 9520986
|
58,032 | 2012 |
4.8
|
C |
| 1926 |
FORMENTERA
IMO 9721413
|
38,710 | 2015 |
4.8
|
C |
| 1927 |
ROSTRUM AMERICA
IMO 9910351
|
40,007 | 2022 |
4.8
|
C |
| 1928 |
VIRGO STELLAR
IMO 9384540
|
58,663 | 2008 |
4.8
|
C |
| 1929 |
UNITY STAR
IMO 9687148
|
37,614 | 2012 |
4.8
|
C |
| 1930 |
SEA BRAVERY
IMO 9386407
|
58,722 | 2008 |
4.8
|
C |
| 1931 |
KARTERIA
IMO 9236092
|
50,320 | 2001 |
4.8
|
C |
| 1932 |
ZE XIANG
IMO 9360025
|
56,557 | 2008 |
4.8
|
C |
| 1933 |
ANYA
IMO 9730268
|
58,593 | 2017 |
4.8
|
C |
| 1934 |
SEA VIRYA
IMO 9626974
|
56,512 | 2013 |
4.8
|
C |
| 1935 |
EUCALYPTUS
IMO 9832456
|
36,896 | 2019 |
4.8
|
C |
| 1936 |
DK IONE
IMO 9528158
|
58,714 | 2010 |
4.8
|
C |
| 1937 |
CL NAKAMA
IMO 9942031
|
37,967 | 2022 |
4.8
|
C |
| 1938 |
SEA FIGHTER
IMO 9799783
|
81,856 | 2018 |
4.8
|
C |
| 1939 |
YASA UNSAL SUNAR
IMO 9396206
|
55,526 | 2007 |
4.8
|
C |
| 1940 |
PRIGIPOS
IMO 9343883
|
92,475 | 2007 |
4.8
|
C |
| 1941 |
NORTH ISLAND
IMO 9705304
|
61,105 | 2015 |
4.8
|
C |
| 1942 |
PAULINE
IMO 9325350
|
53,464 | 2007 |
4.8
|
C |
| 1943 |
VORAS
IMO 9947299
|
63,608 | 2023 |
4.8
|
C |
| 1944 |
TAC SUZUKA
IMO 9880128
|
40,273 | 2021 |
4.8
|
C |
| 1945 |
KIRAN AFRICA
IMO 9491173
|
79,105 | 2011 |
4.8
|
C |
| 1946 |
SCOTER
IMO 9902299
|
38,270 | 2021 |
4.8
|
C |
| 1947 |
ANNA S
IMO 9207778
|
75,942 | 2001 |
4.8
|
C |
| 1948 |
AROSA
IMO 9244829
|
76,015 | 2001 |
4.8
|
C |
| 1949 |
AMOY CENTURY
IMO 9797008
|
61,438 | 2017 |
4.8
|
C |
| 1950 |
FUJI HARMONY
IMO 9913999
|
39,989 | 2022 |
4.8
|
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.