General Cargo Emissions & Retrofit Radar
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.
CII band distribution
509 at D/E2,735 rated vessels · 274 of the D/E set dock within 12 months
Docking pipeline — D/E vessels per quarter
Windows estimated from the class-expiry docking model, not bookings.
Top eligible retrofit measures for this segment
| Measure | Eligible | CO₂ reduction | Capex band | Payback | Confidence |
|---|---|---|---|---|---|
| Propeller redesign / replacement | 1,466 | 5–10% | €400k–1,200k | — | vendor claim |
| Rotor sails (per unit) | 789 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 789 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Turbocharger cut-out | 681 | 1–3% | €80k–250k | — | vendor claim |
| Bulbous bow reprofiling | 570 | 2–6% | €300k–900k | — | vendor claim |
| Shaft generator / PTO | 102 | 3–6% | €500–1,500/kW | — | vendor claim |
Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.
Retrofit opportunity in this segment
Retrofit prospects — worst band first
| Vessel | Band | Age | Drop year |
|---|---|---|---|
| KOKODA CHIEF · <25k | E | 15y | 2026 |
| CLAUDIO CUCCO · <25k | E | 40y | 2026 |
| GINO CUCCO · <25k | E | 39y | 2026 |
| GIUSEPPE CUCCO · <25k | E | 49y | 2026 |
| LADY OF CHICHESTER · <25k | E | 56y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 951 |
SLUISGRACHT
IMO 9202522
|
21,449 | 2001 |
15.1
|
D |
| 952 |
TURAN C
IMO 9558490
|
18,429 | 2010 |
15.1
|
D |
| 953 |
RAMA H
IMO 8105404
|
8,214 | 1982 |
15.2
|
E |
| 954 |
AZOV CONCEPT
IMO 9345726
|
8,048 | 2006 |
15.2
|
E |
| 955 |
KRIS
IMO 9408889
|
8,678 | 2007 |
15.2
|
E |
| 956 |
KAREWOOD STAR
IMO 9363986
|
6,315 | 2007 |
15.2
|
E |
| 957 |
AZZARO
IMO 9213727
|
8,733 | 2000 |
15.2
|
E |
| 958 |
PRETTY AYA
IMO 9581710
|
8,397 | 2012 |
15.2
|
E |
| 959 |
UKPIK
IMO 9468114
|
12,575 | 2011 |
15.2
|
E |
| 960 |
VECHTBORG
IMO 9160334
|
9,567 | 1998 |
15.2
|
E |
| 961 |
ONEGO OTRA
IMO 9535606
|
10,872 | 2010 |
15.2
|
E |
| 962 |
WILSON NEWCASTLE
IMO 9431006
|
8,701 | 2011 |
15.2
|
E |
| 963 |
HOUTMANGRACHT
IMO 9435765
|
12,635 | 2009 |
15.2
|
E |
| 964 |
JUTLAND
IMO 9277345
|
7,870 | 2004 |
15.2
|
E |
| 965 |
BEAUTRIDENT
IMO 9369306
|
7,223 | 2008 |
15.3
|
E |
| 966 |
LOVISA
IMO 9957397
|
7,896 | 2023 |
15.3
|
E |
| 967 |
IJSSELBORG
IMO 9456745
|
12,016 | 2010 |
15.3
|
E |
| 968 |
TRADE NAVIGATOR
IMO 9631371
|
8,095 | 2013 |
15.3
|
E |
| 969 |
O7 LAFITE
IMO 9534482
|
10,049 | 2013 |
15.3
|
E |
| 970 |
ONEGO GLOMMA
IMO 9294977
|
10,649 | 2004 |
15.3
|
E |
| 971 |
ROGALAND
IMO 9505596
|
9,734 | 2011 |
15.3
|
E |
| 972 |
WILSON NANTES
IMO 9430973
|
8,709 | 2011 |
15.3
|
E |
| 973 |
OCEAN CARRIER
IMO 9349435
|
9,653 | 2010 |
15.3
|
E |
| 974 |
WILSON NARVIK
IMO 9430961
|
8,724 | 2011 |
15.4
|
E |
| 975 |
SPRING
IMO 8408650
|
8,881 | 1985 |
15.4
|
E |
| 976 |
ONEGO OLZA
IMO 9511648
|
10,500 | 2010 |
15.4
|
E |
| 977 |
TITTERI
IMO 9685085
|
11,815 | 2016 |
15.4
|
E |
| 978 |
KAREWOOD GLORY
IMO 9281504
|
6,315 | 2006 |
15.4
|
E |
| 979 |
FRANZISKA
IMO 9535618
|
10,872 | 2011 |
15.4
|
E |
| 980 |
MARIETJE DEBORAH
IMO 9481594
|
8,486 | 2011 |
15.4
|
E |
| 981 |
ANNA
IMO 9631345
|
8,096 | 2013 |
15.4
|
E |
| 982 |
HAPPY ROVER
IMO 9139309
|
15,443 | 1997 |
15.4
|
E |
| 983 |
O7 GAJA
IMO 9273791
|
12,767 | 2006 |
15.5
|
E |
| 984 |
BEAUTRADER
IMO 9428657
|
7,211 | 2009 |
15.5
|
E |
| 985 |
WILSON NANJING
IMO 9431018
|
8,703 | 2012 |
15.5
|
E |
| 986 |
JAMTLAND
IMO 9277319
|
7,755 | 2003 |
15.5
|
E |
| 987 |
OCEAN TRADER
IMO 9349461
|
9,705 | 2011 |
15.5
|
E |
| 988 |
UGAH DISCOVERY
IMO 9823871
|
6,004 | 2019 |
15.5
|
E |
| 989 |
ABANA
IMO 9158070
|
8,362 | 1998 |
15.5
|
E |
| 990 |
EBRU
IMO 9235490
|
9,623 | 2000 |
15.5
|
E |
| 991 |
AK HAMZA
IMO 9338125
|
8,710 | 2005 |
15.6
|
E |
| 992 |
OPPLAND
IMO 9505613
|
9,744 | 2011 |
15.6
|
E |
| 993 |
FAGELGRACHT
IMO 9428425
|
12,191 | 2011 |
15.6
|
E |
| 994 |
FLEVOGRACHT
IMO 9509956
|
12,086 | 2011 |
15.6
|
E |
| 995 |
SEA DISCOVERY
IMO 9516131
|
9,732 | 2012 |
15.6
|
E |
| 996 |
MEDEMBORG
IMO 9142514
|
9,769 | 1997 |
15.6
|
E |
| 997 |
KLAUS
IMO 9570632
|
7,909 | 2011 |
15.6
|
E |
| 998 |
JUNO
IMO 9421154
|
7,807 | 2009 |
15.6
|
E |
| 999 |
BBC ROSARIO
IMO 9337224
|
12,873 | 2007 |
15.7
|
E |
| 1000 |
ARGO
IMO 9421128
|
7,816 | 2009 |
15.7
|
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.