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 |
|---|---|---|---|---|---|
| 3051 |
MATIN BEY
IMO 9082623
|
26,477 | 1996 |
6.7
|
E |
| 3052 |
ORIONI
IMO 9486477
|
33,800 | 2012 |
6.7
|
E |
| 3053 |
TANAIS DREAM
IMO 9283899
|
28,611 | 2003 |
6.7
|
E |
| 3054 |
TBC PRESTIGE
IMO 9489833
|
38,118 | 2014 |
6.8
|
E |
| 3055 |
ZANTE DAWN
IMO 9520637
|
34,125 | 2011 |
6.8
|
E |
| 3056 |
BRAVE LEADER
IMO 9033505
|
22,242 | 1992 |
6.8
|
E |
| 3057 |
LYULIN
IMO 9498248
|
30,686 | 2011 |
6.8
|
E |
| 3058 |
ROZANA
IMO 9198381
|
45,572 | 2000 |
6.8
|
E |
| 3059 |
LIVADI
IMO 9522946
|
35,058 | 2011 |
6.8
|
E |
| 3060 |
FOUR RIGOLETTO
IMO 9450674
|
36,472 | 2011 |
6.8
|
E |
| 3061 |
SELIN-M
IMO 9178551
|
31,770 | 1998 |
6.8
|
E |
| 3062 |
NORD VIND
IMO 9573921
|
28,225 | 2011 |
6.8
|
E |
| 3063 |
DENSA SEA LION
IMO 9649079
|
36,765 | 2013 |
6.8
|
E |
| 3064 |
C LEOPARD
IMO 9542817
|
35,774 | 2010 |
6.8
|
E |
| 3065 |
GLOBAL FORTUNE
IMO 9467603
|
33,701 | 2011 |
6.8
|
E |
| 3066 |
HPC SUNRISE
IMO 9455375
|
35,152 | 2011 |
6.8
|
E |
| 3067 |
CLIPPER TRIUMPH
IMO 9406025
|
30,472 | 2009 |
6.8
|
E |
| 3068 |
SEA FALCON II
IMO 9595163
|
37,152 | 2011 |
6.8
|
E |
| 3069 |
MAPLE STAR
IMO 9662370
|
35,322 | 2012 |
6.8
|
E |
| 3070 |
STORM RIDER
IMO 9595357
|
34,154 | 2011 |
6.8
|
E |
| 3071 |
LOLO GATE
IMO 9128104
|
27,365 | 1997 |
6.8
|
E |
| 3072 |
LANNA NAREE
IMO 9496939
|
33,842 | 2012 |
6.8
|
E |
| 3073 |
MARYAM D
IMO 9740445
|
35,000 | 2016 |
6.8
|
E |
| 3074 |
ECOATLANTIC
IMO 9347932
|
53,360 | 2010 |
6.8
|
E |
| 3075 |
GOLDEN NOUR
IMO 9497440
|
31,780 | 2011 |
6.8
|
E |
| 3076 |
TIRYANDAFIL
IMO 9320996
|
54,243 | 2007 |
6.8
|
E |
| 3077 |
CAPTAIN RAVI
IMO 9404429
|
38,816 | 2009 |
6.8
|
E |
| 3078 |
SEAHOPE
IMO 9598294
|
32,922 | 2012 |
6.8
|
E |
| 3079 |
WESTERN MIAMI
IMO 9743215
|
39,269 | 2015 |
6.8
|
E |
| 3080 |
PARALOS
IMO 9325099
|
30,439 | 2006 |
6.8
|
E |
| 3081 |
AGIA ELENI
IMO 9370317
|
29,664 | 2008 |
6.8
|
E |
| 3082 |
ALITHIA
IMO 9595840
|
35,062 | 2012 |
6.8
|
E |
| 3083 |
ISA
IMO 9180358
|
34,939 | 1999 |
6.8
|
E |
| 3084 |
MINANUR CEBI 1
IMO 9480564
|
33,810 | 2011 |
6.8
|
E |
| 3085 |
MERITIUS
IMO 9515632
|
28,417 | 2009 |
6.8
|
E |
| 3086 |
MYKONOS
IMO 9647875
|
30,912 | 2013 |
6.8
|
E |
| 3087 |
STRATEGIC EXPLORER
IMO 9723708
|
39,880 | 2015 |
6.8
|
E |
| 3088 |
CORELIT
IMO 9573799
|
28,189 | 2010 |
6.8
|
E |
| 3089 |
ZAFER
IMO 9579315
|
37,768 | 2011 |
6.8
|
E |
| 3090 |
ANANYA NAREE
IMO 9464003
|
33,856 | 2011 |
6.8
|
E |
| 3091 |
OBORISHTE
IMO 9415167
|
29,999 | 2010 |
6.8
|
E |
| 3092 |
IRMA
IMO 9180396
|
34,947 | 2000 |
6.8
|
E |
| 3093 |
BUDVA
IMO 9693501
|
35,000 | 2014 |
6.8
|
E |
| 3094 |
LMZ EUROPA
IMO 9588562
|
56,771 | 2011 |
6.8
|
E |
| 3095 |
NAVA ULYSSES
IMO 9602186
|
34,898 | 2012 |
6.8
|
E |
| 3096 |
PEACE M
IMO 9086318
|
26,467 | 1996 |
6.8
|
E |
| 3097 |
NOELLE G
IMO 9459967
|
30,877 | 2011 |
6.9
|
E |
| 3098 |
STRATEGIC ENDEAVOR
IMO 9475727
|
33,078 | 2010 |
6.9
|
E |
| 3099 |
ATHENA
IMO 9497880
|
57,809 | 2012 |
6.9
|
E |
| 3100 |
LUCKY HONG
IMO 9443384
|
32,919 | 2009 |
6.9
|
E |
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.