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 |
|---|---|---|---|---|---|
| 2151 |
SPAR GEMINI
IMO 9307580
|
53,113 | 2007 |
5.1
|
D |
| 2152 |
STAR PISCES
IMO 9715854
|
60,916 | 2015 |
5.1
|
D |
| 2153 |
HAMBURG EAGLE
IMO 9698587
|
63,800 | 2014 |
5.1
|
D |
| 2154 |
FEI RUN
IMO 9621015
|
56,928 | 2011 |
5.1
|
D |
| 2155 |
FEDERAL MICHIGAN
IMO 9975416
|
34,763 | 2024 |
5.1
|
D |
| 2156 |
OTZIAS
IMO 9594418
|
56,720 | 2012 |
5.1
|
D |
| 2157 |
NING YUE HAI
IMO 9751339
|
63,561 | 2017 |
5.1
|
D |
| 2158 |
HMZ ISLAND
IMO 9231676
|
28,740 | 2002 |
5.1
|
D |
| 2159 |
NORSE MOBILE
IMO 9943554
|
40,020 | 2022 |
5.1
|
D |
| 2160 |
WAIMEA
IMO 9513907
|
55,395 | 2010 |
5.1
|
D |
| 2161 |
HALONA
IMO 9286920
|
75,776 | 2005 |
5.1
|
D |
| 2162 |
ONE AND ONLY
IMO 9657868
|
40,576 | 2014 |
5.1
|
D |
| 2163 |
STAR SANDPIPER
IMO 9441427
|
57,809 | 2011 |
5.1
|
D |
| 2164 |
CHARISMA
IMO 9409132
|
55,667 | 2010 |
5.1
|
D |
| 2165 |
SAKURA HARMONY
IMO 9914008
|
39,962 | 2022 |
5.1
|
D |
| 2166 |
GARGANEY
IMO 9983475
|
39,830 | 2024 |
5.1
|
D |
| 2167 |
CLEAR SKY
IMO 9663245
|
63,600 | 2014 |
5.1
|
D |
| 2168 |
BULK MANARA
IMO 9478951
|
55,692 | 2010 |
5.1
|
D |
| 2169 |
MAVI VATAN
IMO 9336787
|
32,561 | 2007 |
5.1
|
D |
| 2170 |
VERBIER
IMO 9529619
|
71,066 | 2012 |
5.1
|
D |
| 2171 |
THOR CHAICHANA
IMO 9638501
|
58,605 | 2013 |
5.1
|
D |
| 2172 |
ATLANTIC B
IMO 9278428
|
76,267 | 2004 |
5.1
|
D |
| 2173 |
FRIDA BULKER
IMO 9968970
|
40,161 | 2023 |
5.1
|
D |
| 2174 |
CYTA
IMO 1015313
|
40,442 | 2024 |
5.1
|
D |
| 2175 |
ELINA B.
IMO 9577446
|
58,480 | 2011 |
5.1
|
D |
| 2176 |
NORSE IJMUIDEN
IMO 9905253
|
42,469 | 2021 |
5.1
|
D |
| 2177 |
ALANYA-M
IMO 9158159
|
41,327 | 2004 |
5.1
|
D |
| 2178 |
NINGHAI
IMO 9753296
|
40,069 | 2017 |
5.1
|
D |
| 2179 |
AFRICAN TOUCAN
IMO 9801263
|
37,800 | 2014 |
5.1
|
D |
| 2180 |
GREAT PROFIT
IMO 9792888
|
38,648 | 2018 |
5.1
|
D |
| 2181 |
SPAR LYNX
IMO 9289025
|
53,162 | 2005 |
5.1
|
D |
| 2182 |
SPAR SCORPIO
IMO 9307578
|
53,565 | 2006 |
5.1
|
D |
| 2183 |
FEDERAL SKYE
IMO 9606833
|
37,169 | 2012 |
5.1
|
D |
| 2184 |
LAGO DI CANCANO
IMO 9659787
|
37,500 | 2014 |
5.1
|
D |
| 2185 |
AFRICAN GOLDENEYE
IMO 9510371
|
58,110 | 2012 |
5.1
|
D |
| 2186 |
THOR MAXIMUS
IMO 9291391
|
55,695 | 2005 |
5.1
|
D |
| 2187 |
ULTRA BOSQUE
IMO 9880013
|
40,261 | 2020 |
5.1
|
D |
| 2188 |
SIBULK TRADITION
IMO 9442902
|
53,206 | 2008 |
5.1
|
D |
| 2189 |
AMIS FORTUNE
IMO 9724178
|
55,468 | 2015 |
5.1
|
D |
| 2190 |
NORSE SAVANNAH
IMO 9927005
|
40,020 | 2022 |
5.1
|
D |
| 2191 |
FORTUNE COOKIE
IMO 9908449
|
37,939 | 2021 |
5.1
|
D |
| 2192 |
WESTERN FEDORA
IMO 9609689
|
37,405 | 2012 |
5.1
|
D |
| 2193 |
SWAN RIVER
IMO 9302841
|
55,947 | 2005 |
5.1
|
D |
| 2194 |
EVONA
IMO 9552355
|
58,721 | 2013 |
5.1
|
D |
| 2195 |
IYO SEA
IMO 9722455
|
37,537 | 2015 |
5.1
|
D |
| 2196 |
NORD RIO
IMO 9911977
|
39,956 | 2022 |
5.1
|
D |
| 2197 |
FEDERAL TAKASE
IMO 9658989
|
55,178 | 2016 |
5.1
|
D |
| 2198 |
FEDERAL WISCONSIN
IMO 9975404
|
34,763 | 2024 |
5.1
|
D |
| 2199 |
COMMON SPIRIT
IMO 9594717
|
57,078 | 2011 |
5.2
|
D |
| 2200 |
KLIMA
IMO 9594561
|
57,000 | 2013 |
5.2
|
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.