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 2025. 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 · 271 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 | 1,462 | 5–10% | €400k–1,200k | — | vendor claim |
| Rotor sails (per unit) | 756 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 756 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Turbocharger cut-out | 652 | 1–3% | €80k–250k | — | vendor claim |
| Bulbous bow reprofiling | 566 | 2–6% | €300k–900k | — | vendor claim |
| Shaft generator / PTO | 97 | 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 |
|---|---|---|---|---|---|
| 851 |
SUOMIGRACHT
IMO 9288057
|
23,660 | 2004 |
12.3
|
B |
| 852 |
DA ZHI
IMO 9608439
|
29,496 | 2014 |
12.3
|
B |
| 853 |
TQ MERSIN
IMO 1052270
|
12,060 | 2008 |
12.4
|
B |
| 854 |
MERCURIUS
IMO 9622394
|
5,893 | 2012 |
12.4
|
B |
| 856 |
ANDESBORG
IMO 9466324
|
17,294 | 2011 |
12.4
|
B |
| 855 |
ARKLOW ARROW
IMO 9851971
|
8,543 | 2021 |
12.4
|
B |
| 858 |
LADY LEYLA
IMO 9106986
|
11,366 | 1995 |
12.4
|
B |
| 857 |
ADALADY
IMO 9664160
|
13,559 | 2013 |
12.4
|
B |
| 859 |
ECO TITAN
IMO 9933793
|
9,000 | 2023 |
12.4
|
B |
| 860 |
AMURBORG
IMO 9466336
|
17,294 | 2011 |
12.4
|
B |
| 861 |
FWN SUN
IMO 9721669
|
10,546 | 2016 |
12.4
|
B |
| 862 |
BBA LARISA
IMO 9166510
|
5,005 | 1999 |
12.4
|
B |
| 866 |
SAMPOGRACHT
IMO 9288071
|
23,741 | 2005 |
12.4
|
B |
| 865 |
CELIK 1
IMO 9430791
|
7,702 | 2007 |
12.4
|
B |
| 864 |
ANOUK
IMO 9196266
|
3,171 | 2000 |
12.4
|
B |
| 863 |
TRANSOSPREY
IMO 9213090
|
20,396 | 2003 |
12.4
|
B |
| 867 |
TQ ISTANBUL
IMO 9006332
|
3,713 | 1993 |
12.4
|
B |
| 868 |
VECTIS PROGRESS
IMO 9626144
|
11,051 | 2012 |
12.4
|
B |
| 869 |
EKMEN STAR
IMO 9218193
|
7,580 | 2001 |
12.4
|
B |
| 870 |
CONDOR MAGALLANES
IMO 9539365
|
19,024 | 2011 |
12.4
|
B |
| 871 |
PAN BOREAS
IMO 9488645
|
8,090 | 2008 |
12.5
|
B |
| 872 |
CONDOR BILBAO
IMO 9473250
|
17,287 | 2012 |
12.5
|
B |
| 874 |
BBC PERU
IMO 9549592
|
13,537 | 2012 |
12.5
|
B |
| 873 |
LAGA
IMO 9006318
|
3,710 | 1993 |
12.5
|
B |
| 875 |
NOSSAN
IMO 9988516
|
5,080 | 2025 |
12.5
|
B |
| 876 |
ECO TROPHY
IMO 9938688
|
9,120 | 2024 |
12.5
|
B |
| 877 |
ELKE K.
IMO 9879040
|
5,180 | 2020 |
12.5
|
B |
| 879 |
GOTLAND
IMO 9480136
|
17,409 | 2011 |
12.5
|
B |
| 878 |
NORMA
IMO 9306419
|
8,100 | 2006 |
12.5
|
B |
| 880 |
KELLY
IMO 9255622
|
9,857 | 2004 |
12.5
|
B |
| 882 |
AMSTELBORG
IMO 9333527
|
17,356 | 2006 |
12.6
|
B |
| 881 |
VESTANHAV
IMO 9504152
|
9,927 | 2012 |
12.6
|
B |
| 883 |
CSL FLEXVIK
IMO 9521825
|
18,003 | 2012 |
12.6
|
B |
| 884 |
CHARLIE
IMO 9736236
|
12,234 | 2022 |
12.6
|
B |
| 885 |
RONNIE
IMO 9736224
|
12,325 | 2021 |
12.6
|
B |
| 886 |
ECO TRIUMPH
IMO 9938717
|
9,000 | 2025 |
12.6
|
B |
| 887 |
INDUSTRIAL MOMENTUM
IMO 9534432
|
10,049 | 2010 |
12.6
|
B |
| 888 |
JANINE
IMO 9014664
|
3,700 | 1991 |
12.6
|
B |
| 889 |
ANKA BLUE
IMO 9317808
|
8,181 | 2005 |
12.6
|
B |
| 892 |
ARKLOW MANOR
IMO 9440241
|
14,998 | 2009 |
12.6
|
B |
| 891 |
GEMINI MAESTRO
IMO 9350006
|
7,448 | 2007 |
12.6
|
B |
| 890 |
NORTHSTAR GLORY
IMO 9033854
|
3,857 | 1992 |
12.6
|
B |
| 893 |
NISA SOFUOGLU
IMO 9554121
|
6,566 | 2010 |
12.6
|
B |
| 898 |
HELEN H
IMO 9139115
|
5,278 | 1997 |
12.6
|
B |
| 897 |
ARKLOW MARSH
IMO 9440253
|
14,998 | 2010 |
12.6
|
B |
| 896 |
EKMEN ROYAL
IMO 9165865
|
10,334 | 2005 |
12.6
|
B |
| 895 |
IBRAHIM KONAN
IMO 9306328
|
8,107 | 2006 |
12.6
|
B |
| 894 |
RIX FLEVO
IMO 9139335
|
4,466 | 1996 |
12.6
|
B |
| 900 |
SVEND
IMO 1034357
|
12,196 | 2025 |
12.7
|
B |
| 899 |
ADA
IMO 1060784
|
8,311 | 2024 |
12.7
|
B |
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.