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 |
|---|---|---|---|---|---|
| 2001 |
AVON TRADER
IMO 9566849
|
79,452 | 2012 |
4.8
|
C |
| 2002 |
CATALINA
IMO 9299604
|
74,288 | 2005 |
4.8
|
C |
| 2003 |
EVA BRIGHT
IMO 9972438
|
40,577 | 2023 |
4.8
|
C |
| 2004 |
LIZZY CONFIDENCE
IMO 1079929
|
40,506 | 2025 |
4.8
|
C |
| 2005 |
GLOBE ALIKI
IMO 9687100
|
56,104 | 2014 |
4.8
|
C |
| 2006 |
XIN HAI TONG 31
IMO 9635626
|
56,450 | 2013 |
4.8
|
C |
| 2007 |
KANGTING
IMO 9860271
|
37,440 | 2020 |
4.8
|
C |
| 2008 |
KANSU
IMO 9860283
|
37,440 | 2021 |
4.8
|
C |
| 2009 |
FEDERAL THUNDER BAY
IMO 9975375
|
34,763 | 2023 |
4.8
|
C |
| 2010 |
APOLLON TRADER
IMO 9989364
|
40,552 | 2024 |
4.8
|
C |
| 2011 |
SANTANDER
IMO 9916305
|
63,650 | 2022 |
4.8
|
C |
| 2012 |
AMIS KALON
IMO 9520807
|
58,107 | 2010 |
4.8
|
C |
| 2013 |
YASA MAGNOLIA
IMO 9991642
|
40,558 | 2025 |
4.8
|
C |
| 2014 |
GREAT VOYAGE
IMO 9909106
|
61,088 | 2021 |
4.8
|
C |
| 2015 |
SEA GOAT
IMO 1014606
|
40,255 | 2024 |
4.8
|
C |
| 2016 |
TN DAWN
IMO 9373993
|
56,678 | 2008 |
4.8
|
C |
| 2017 |
BESIKTAS-M
IMO 9291365
|
53,020 | 2003 |
4.8
|
C |
| 2018 |
DIONYSUS
IMO 9696515
|
63,159 | 2015 |
4.8
|
C |
| 2019 |
FEDERAL FRANKLIN
IMO 9866732
|
34,492 | 2021 |
4.8
|
C |
| 2020 |
UNITY MAPLE
IMO 9607019
|
55,705 | 2013 |
4.8
|
C |
| 2021 |
KOM
IMO 9905708
|
32,162 | 2021 |
4.8
|
C |
| 2022 |
STELLA ISLAND
IMO 9278882
|
52,544 | 2005 |
4.8
|
C |
| 2023 |
SPAR SCORPIO
IMO 9307578
|
53,565 | 2006 |
4.8
|
C |
| 2024 |
LOWLANDS PELIKAAN
IMO 9700005
|
39,260 | 2015 |
4.8
|
C |
| 2025 |
DALIDA
IMO 9324148
|
56,010 | 2007 |
4.8
|
C |
| 2026 |
KYVELI GS
IMO 9881146
|
39,870 | 2020 |
4.8
|
C |
| 2027 |
EFFY N
IMO 9509516
|
55,804 | 2009 |
4.8
|
C |
| 2028 |
EVONA
IMO 9552355
|
58,721 | 2013 |
4.8
|
C |
| 2029 |
LIGNUM GRID
IMO 9897975
|
42,446 | 2022 |
4.8
|
C |
| 2030 |
STRATEGIC ENTITY
IMO 9723710
|
39,880 | 2015 |
4.8
|
C |
| 2031 |
SAFI ALFA
IMO 9298545
|
52,514 | 2005 |
4.8
|
C |
| 2032 |
AROSA
IMO 9420265
|
55,477 | 2009 |
4.8
|
C |
| 2033 |
YELLOW FIN
IMO 9607289
|
56,777 | 2011 |
4.8
|
C |
| 2034 |
SHENG HE HAI
IMO 9677325
|
58,089 | 2015 |
4.8
|
C |
| 2035 |
LAN BAO HAI
IMO 9738105
|
39,779 | 2015 |
4.8
|
C |
| 2036 |
VENTURE
IMO 9714721
|
61,272 | 2016 |
4.8
|
C |
| 2037 |
WOOYANG DANDY
IMO 9455648
|
56,819 | 2009 |
4.8
|
C |
| 2038 |
BULK FRIENDSHIP
IMO 9496977
|
58,738 | 2011 |
4.8
|
C |
| 2039 |
KOZNITZA
IMO 9996927
|
32,228 | 2024 |
4.8
|
C |
| 2040 |
AMIS BRAVE
IMO 9667459
|
61,467 | 2013 |
4.8
|
C |
| 2041 |
FEDERAL BALTIC
IMO 9697806
|
34,564 | 2015 |
4.8
|
C |
| 2042 |
SHENG FENG HAI
IMO 9533074
|
56,879 | 2011 |
4.8
|
C |
| 2043 |
RABEA
IMO 9725524
|
39,998 | 2018 |
4.8
|
C |
| 2044 |
KYRA PANAGHIA
IMO 9647277
|
63,351 | 2012 |
4.8
|
C |
| 2045 |
URUGUAY
IMO 9426154
|
57,937 | 2011 |
4.8
|
C |
| 2046 |
INTERLINK FORTUITY
IMO 9711755
|
40,083 | 2017 |
4.8
|
C |
| 2047 |
TABIT
IMO 9983229
|
40,004 | 2024 |
4.8
|
C |
| 2048 |
GLOBAL UNITY
IMO 9665542
|
63,238 | 2013 |
4.8
|
C |
| 2049 |
BERNINA
IMO 9423580
|
58,682 | 2011 |
4.8
|
C |
| 2050 |
TOXOTIS
IMO 9563419
|
56,713 | 2010 |
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 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.