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Most Emission-Efficient General Cargos

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.

Segment rank (2024)
#991 of 1,190 general cargos
CO₂ intensity
15.5 g CO₂/dwt·nm
vs segment average (10.91)
+42% 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
1,215
vessels ranked
3.23
greenest (g CO₂/t·nm)
11.21
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
951 LILY-HA
IMO 8116972
 12,352 1982
15.1
D
952 ZEKO Y
IMO 8027573
 8,528 1981
15.1
D
953 SLUISGRACHT
IMO 9202522
 21,448 2001
15.1
E
954 TURAN C
IMO 9558490
 18,429 2010
15.1
E
955 RAMA H
IMO 8105404
 8,214 1982
15.2
E
956 KRIS
IMO 9408889
 8,678 2007
15.2
E
957 ALANIS
IMO 9468085
 12,653 2010
15.2
E
958 KAREWOOD STAR
IMO 9363986
 6,315 2007
15.2
E
959 AZZARO
IMO 9213727
 8,733 2000
15.2
E
960 PRETTY AYA
IMO 9581710
 8,397 2012
15.2
E
961 UKPIK
IMO 9468114
 12,575 2011
15.2
E
962 VECHTBORG
IMO 9160334
 9,567 1998
15.2
E
963 ONEGO OTRA
IMO 9535606
 10,872 2010
15.2
E
964 HOUTMANGRACHT
IMO 9435765
 12,635 2009
15.2
E
965 WILSON NEWCASTLE
IMO 9431006
 8,701 2011
15.2
E
966 JUTLAND
IMO 9277345
 7,870 2004
15.2
E
967 BEAUTRIDENT
IMO 9369306
 7,223 2008
15.3
E
968 LOVISA
IMO 9957397
 7,896 2023
15.3
E
969 IJSSELBORG
IMO 9456745
 12,016 2010
15.3
E
970 TRADE NAVIGATOR
IMO 9631371
 8,095 2013
15.3
E
971 O7 LAFITE
IMO 9534482
 10,049 2013
15.3
E
972 MYRTE
IMO 9364136
 8,390 2008
15.3
E
973 ONEGO GLOMMA
IMO 9294977
 10,649 2004
15.3
E
974 ROGALAND
IMO 9505596
 9,734 2011
15.3
E
975 WILSON NANTES
IMO 9430973
 8,709 2011
15.3
E
976 OCEAN CARRIER
IMO 9349435
 9,653 2010
15.3
E
977 WILSON NARVIK
IMO 9430961
 8,724 2011
15.4
E
978 SPRING
IMO 8408650
 8,881 1985
15.4
E
979 ONEGO OLZA
IMO 9511648
 10,500 2010
15.4
E
980 MARIETJE DEBORAH
IMO 9481594
 8,493 2011
15.4
E
981 TITTERI
IMO 9685085
 11,815 2016
15.4
E
982 KAREWOOD GLORY
IMO 9281504
 6,315 2006
15.4
E
983 FRANZISKA
IMO 9535618
 10,872 2011
15.4
E
984 ANNA
IMO 9631345
 8,096 2013
15.4
E
985 HAPPY ROVER
IMO 9139309
 15,443 1997
15.4
E
986 O7 GAJA
IMO 9273791
 12,767 2006
15.5
E
987 BEAUTRADER
IMO 9428657
 7,211 2009
15.5
E
988 WILSON NANJING
IMO 9431018
 8,703 2012
15.5
E
989 JAMTLAND
IMO 9277319
 7,755 2003
15.5
E
990 OCEAN TRADER
IMO 9349461
 9,705 2011
15.5
E
991 UGAH DISCOVERY
IMO 9823871
 6,004 2019
15.5
E
992 ABANA
IMO 9158070
 8,362 1998
15.5
E
993 OPPLAND
IMO 9505613
 9,744 2011
15.6
E
994 FAGELGRACHT
IMO 9428425
 12,190 2011
15.6
E
995 FLEVOGRACHT
IMO 9509956
 12,086 2011
15.6
E
996 SEA DISCOVERY
IMO 9516131
 9,732 2012
15.6
E
997 MEDEMBORG
IMO 9142514
 9,769 1997
15.6
E
998 KLAUS
IMO 9570632
 7,909 2011
15.6
E
999 BBC ROSARIO
IMO 9337224
 12,873 2007
15.7
E
1000 MORGENSTOND II
IMO 9367073
 12,102 2007
15.7
E
Page 20 of 24 — 1,190 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 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.

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.