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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.

Segment rank (2025)
#3,066 of 3,436 bulk carriers
CO₂ intensity
6.8 g CO₂/dwt·nm
vs segment average (4.71)
+43% higher
E
Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo
Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates
Size (DWT)
All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT
Year
2025 2024
3,507
vessels ranked
1.74
greenest (g CO₂/t·nm)
4.46
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
3051 EXPLORER AMERICA
IMO 9566576
 61,684 2011
6.7
E
3052 BUNDU
IMO 9273014
 16,765 2003
6.7
E
3053 STAR PEGASUS
IMO 9621780
 56,540 2013
6.7
E
3054 TELERIG
IMO 9452854
 56,867 2011
6.7
E
3055 AGIOS NEKTARIOS I
IMO 9515759
 56,722 2010
6.7
E
3056 SUZANNA D
IMO 9589097
 37,205 2012
6.7
E
3057 PHILIPPAKOS
IMO 9569932
 57,080 2010
6.7
E
3058 OSOGOVO
IMO 9498250
 30,693 2011
6.7
E
3059 RAS GHUMAYS - I
IMO 9494034
 57,423 2011
6.7
E
3060 KACEY
IMO 9420277
 55,522 2009
6.7
E
3061 RODOPI
IMO 9498274
 30,679 2012
6.7
E
3062 SEMIHA-AHMET-M
IMO 9381873
 42,704 2007
6.7
E
3063 LILA NOLA
IMO 9621041
 35,501 2012
6.7
E
3064 BOW ARM
IMO 9558737
 35,106 2009
6.7
E
3065 DR SARKAS
IMO 9222558
 28,290 2001
6.7
E
3066 IVORY GULL
IMO 9475715
 32,929 2009
6.8
E
3067 AFRICAN LILY
IMO 9666443
 28,340 2015
6.8
E
3068 PANDA
IMO 9748277
 34,960 2018
6.8
E
3069 STRATEGIC EQUITY
IMO 9689902
 39,880 2014
6.8
E
3070 KYALAMI
IMO 9574200
 28,202 2011
6.8
E
3071 REVENGER
IMO 9467548
 35,070 2009
6.8
E
3072 ETHRA 1
IMO 9414759
 32,641 2010
6.8
E
3073 POAVOSA WISDOM VIII
IMO 9641924
 28,208 2013
6.8
E
3074 MANASSA QUEEN
IMO 9152478
 23,544 1997
6.8
E
3075 CARLA C
IMO 9718442
 37,500 2015
6.8
E
3076 NIMERTIS
IMO 9650999
 28,396 2013
6.8
E
3077 LMZ PLUTO
IMO 9585326
 56,705 2011
6.8
E
3078 CAPTAIN RAVI
IMO 9404429
 38,816 2009
6.8
E
3079 SPRING PROSPER
IMO 9559705
 32,625 2010
6.8
E
3080 STRATEGIC TENACITY
IMO 9626302
 36,851 2012
6.8
E
3081 STADION II
IMO 9414462
 30,200 2012
6.8
E
3082 VANTAGE EUPHORIA
IMO 9620126
 32,071 2013
6.8
E
3083 POMORZE
IMO 9346823
 38,981 2008
6.8
E
3084 ARKLOW SPIRIT
IMO 9649536
 34,905 2013
6.8
E
3085 THE RAINBOW
IMO 9452658
 57,001 2011
6.8
E
3086 TASAN
IMO 9404431
 38,817 2010
6.8
E
3087 SAGITTARIUS
IMO 9550254
 28,508 2010
6.8
E
3088 CARME
IMO 9697961
 35,906 2014
6.8
E
3089 BAM ARION
IMO 9414450
 30,000 2012
6.8
E
3090 BRIGHT STAR
IMO 9481960
 36,471 2011
6.8
E
3091 TARSUS-M
IMO 9188908
 41,675 2006
6.8
E
3092 TRUE PRESTIGE
IMO 9494814
 32,077 2010
6.8
E
3093 BENJAMAS NAREE
IMO 9464027
 33,780 2012
6.8
E
3094 SOFIA R
IMO 9530967
 36,093 2012
6.8
E
3095 ECO SPITFIRE
IMO 9539468
 33,664 2012
6.8
E
3096 EAGLE TRADER
IMO 9284362
 27,074 2004
6.8
E
3097 BLUE UNION ALPHA
IMO 9604768
 28,386 2011
6.8
E
3098 CHIOS LUCK
IMO 9643805
 36,612 2013
6.8
E
3099 ENTERPRISE
IMO 9522934
 36,490 2011
6.9
E
3100 CS JOLA
IMO 9791896
 37,713 2017
6.9
E
Page 62 of 69 — 3,436 vessels
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Engine intelligence

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.

Emission-friendly engine ranking

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.