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 2025. 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 |
|---|---|---|---|---|---|
| 2151 |
NORSE OSHIMA
IMO 9991226
|
40,093 | 2024 |
5.0
|
D |
| 2152 |
AMIS FORTUNE
IMO 9724178
|
55,468 | 2015 |
5.0
|
D |
| 2153 |
BOA
IMO 9623764
|
57,835 | 2014 |
5.0
|
D |
| 2154 |
AFRICAN OXPECKER
IMO 9681895
|
39,763 | 2014 |
5.0
|
D |
| 2155 |
ARAMIS
IMO 9593359
|
55,830 | 2012 |
5.0
|
D |
| 2156 |
POLYWORLD
IMO 9626584
|
56,645 | 2011 |
5.0
|
D |
| 2157 |
BUNUN POWER
IMO 9782663
|
37,283 | 2021 |
5.0
|
D |
| 2158 |
BIWA ARROW
IMO 9687095
|
55,978 | 2014 |
5.0
|
D |
| 2159 |
FEDERAL MINNESOTA
IMO 9975428
|
34,763 | 2024 |
5.0
|
D |
| 2160 |
NORSE SAVANNAH
IMO 9927005
|
40,020 | 2022 |
5.0
|
D |
| 2161 |
PROMETHEUS Ι
IMO 9513854
|
55,415 | 2012 |
5.0
|
D |
| 2162 |
FEDERAL ST LAURENT
IMO 9838462
|
34,492 | 2019 |
5.0
|
D |
| 2163 |
ECO TRADER
IMO 9989261
|
40,553 | 2024 |
5.0
|
D |
| 2164 |
XENIA
IMO 9317834
|
87,144 | 2006 |
5.0
|
D |
| 2165 |
HONWAY
IMO 9426702
|
61,645 | 2010 |
5.0
|
D |
| 2166 |
DESERT MOON
IMO 9543770
|
57,467 | 2012 |
5.0
|
D |
| 2167 |
BULK COLOMBIA
IMO 9426245
|
57,937 | 2011 |
5.0
|
D |
| 2168 |
LOWLANDS CORSO
IMO 9959450
|
40,039 | 2023 |
5.0
|
D |
| 2169 |
ANNA-THERESA
IMO 9497842
|
58,018 | 2011 |
5.0
|
D |
| 2170 |
MELINDA
IMO 9623881
|
58,000 | 2012 |
5.0
|
D |
| 2171 |
ILENAO
IMO 9524683
|
55,442 | 2010 |
5.0
|
D |
| 2172 |
REGNO MARINUS
IMO 9343467
|
54,238 | 2008 |
5.0
|
D |
| 2173 |
ECO ALNIC
IMO 9728485
|
34,370 | 2016 |
5.0
|
D |
| 2174 |
GREAT INTELLIGENCE
IMO 9800623
|
38,797 | 2017 |
5.0
|
D |
| 2175 |
HANSA NAREE
IMO 9738674
|
39,989 | 2018 |
5.0
|
D |
| 2176 |
TRAVELING SAGE
IMO 9491379
|
55,660 | 2011 |
5.0
|
D |
| 2177 |
GOLDEN ORIENT
IMO 9227194
|
74,077 | 2002 |
5.0
|
D |
| 2178 |
FEDERAL FRASER
IMO 9866744
|
34,492 | 2021 |
5.0
|
D |
| 2179 |
HAI JIN JIANG SH
IMO 9579729
|
55,000 | 2010 |
5.0
|
D |
| 2180 |
INTERLINK CELERITY
IMO 9721437
|
40,111 | 2013 |
5.0
|
D |
| 2181 |
ARUNA ECE
IMO 9635406
|
55,506 | 2012 |
5.0
|
D |
| 2182 |
ANNA-MARIA
IMO 9407469
|
55,664 | 2007 |
5.0
|
D |
| 2183 |
MARTIN
IMO 9441350
|
57,809 | 2010 |
5.0
|
D |
| 2184 |
NORD AEGEAN
IMO 9933054
|
63,702 | 2022 |
5.0
|
D |
| 2185 |
DENSA LION
IMO 9432464
|
55,089 | 2010 |
5.0
|
D |
| 2186 |
EASTERN HAWK
IMO 9888869
|
37,520 | 2020 |
5.0
|
D |
| 2187 |
IRON DUKE
IMO 9577422
|
58,407 | 2011 |
5.0
|
D |
| 2188 |
ANHUI
IMO 9861213
|
39,269 | 2019 |
5.0
|
D |
| 2189 |
SJ BUSAN
IMO 9418729
|
55,940 | 2008 |
5.0
|
D |
| 2190 |
PERELIK
IMO 9905722
|
32,169 | 2022 |
5.0
|
D |
| 2191 |
ROSTRUM SINGAPORE
IMO 9983217
|
40,000 | 2024 |
5.0
|
D |
| 2192 |
PROPEL SUCCESS
IMO 9640607
|
58,665 | 2012 |
5.0
|
D |
| 2193 |
LILA FROSTBURG
IMO 9672507
|
56,425 | 2013 |
5.0
|
D |
| 2194 |
NORDTAJO
IMO 9741865
|
39,890 | 2017 |
5.0
|
D |
| 2195 |
HUA SI HAI
IMO 9626895
|
56,568 | 2012 |
5.0
|
D |
| 2196 |
URSA MINOR
IMO 9711767
|
40,097 | 2013 |
5.0
|
D |
| 2197 |
ULTRA FOREST
IMO 9873888
|
40,261 | 2020 |
5.0
|
D |
| 2198 |
STAR CHALLENGER
IMO 9632997
|
61,462 | 2012 |
5.0
|
D |
| 2199 |
SUPRA BARON
IMO 9409077
|
55,651 | 2009 |
5.0
|
D |
| 2200 |
SUN SHINE
IMO 9405435
|
53,554 | 2007 |
5.0
|
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 2025 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.