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 · 223 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) | 752 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 752 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Turbocharger cut-out | 648 | 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 |
|---|---|---|---|---|---|
| 701 |
T-MED
IMO 9163142
|
6,830 | 1997 |
11.0
|
B |
| 702 |
COSKUNLAR 2
IMO 8943351
|
2,276 | 1998 |
11.0
|
B |
| 703 |
HAKKI AYKIN
IMO 9045730
|
6,962 | 2004 |
11.0
|
B |
| 704 |
BOHWA QUANZHOU
IMO 9311244
|
13,276 | 2004 |
11.0
|
B |
| 706 |
HACI HILMI-II
IMO 9014561
|
6,977 | 1992 |
11.0
|
B |
| 705 |
ALGRACE
IMO 9154270
|
17,064 | 1999 |
11.0
|
B |
| 707 |
TQ TRABZON
IMO 1078614
|
9,770 | 2009 |
11.1
|
B |
| 709 |
BBC FINLAND
IMO 9593684
|
24,964 | 2012 |
11.1
|
B |
| 708 |
ADELHEID BR
IMO 9387621
|
10,860 | 2006 |
11.1
|
B |
| 710 |
BBC SAO PAULO
IMO 9934266
|
13,389 | 2025 |
11.1
|
B |
| 711 |
FWN ARCTIC
IMO 9931484
|
12,563 | 2023 |
11.1
|
B |
| 715 |
JOY EXPRESS
IMO 9378254
|
9,693 | 2006 |
11.1
|
B |
| 714 |
MARTINA
IMO 9594286
|
8,564 | 2012 |
11.1
|
B |
| 713 |
SEVKETTIN SONAY
IMO 9334313
|
14,889 | 2006 |
11.1
|
B |
| 712 |
VIKINGBANK
IMO 9604184
|
11,940 | 2012 |
11.1
|
B |
| 716 |
SELAM
IMO 9418286
|
8,300 | 2008 |
11.1
|
B |
| 717 |
BRAVE KNIGHT
IMO 7129336
|
6,348 | 1972 |
11.1
|
B |
| 718 |
AZZA H
IMO 9016090
|
3,883 | 1991 |
11.1
|
B |
| 720 |
FENER
IMO 9381940
|
5,058 | 2006 |
11.1
|
B |
| 719 |
ACQUA STELLA
IMO 9213210
|
10,610 | 1999 |
11.1
|
B |
| 721 |
KC MERMAID
IMO 9505156
|
7,184 | 2021 |
11.2
|
B |
| 722 |
NERMIN KARABEKIR
IMO 9591820
|
10,953 | 2011 |
11.2
|
B |
| 723 |
BBC ODESA
IMO 9963413
|
12,422 | 2023 |
11.2
|
B |
| 724 |
CHELSEA-3
IMO 9361392
|
5,827 | 2006 |
11.2
|
B |
| 725 |
ECO TRINITY
IMO 9938705
|
9,000 | 2025 |
11.2
|
B |
| 726 |
BBC ST. PETERSBURG
IMO 9736200
|
12,396 | 2020 |
11.2
|
B |
| 727 |
APHRODITE I
IMO 9372468
|
10,353 | 2006 |
11.2
|
B |
| 728 |
CHELSEA-7
IMO 9492634
|
6,320 | 2010 |
11.3
|
B |
| 730 |
ARIANNA
IMO 9406702
|
11,731 | 2007 |
11.3
|
B |
| 729 |
BBC HOUSTON
IMO 9885295
|
13,451 | 2024 |
11.3
|
B |
| 731 |
SUEVE
IMO 1068035
|
5,057 | 2025 |
11.3
|
B |
| 732 |
MICK
IMO 9736183
|
12,234 | 2019 |
11.3
|
B |
| 733 |
HIZIR
IMO 9396529
|
8,128 | 2007 |
11.3
|
B |
| 734 |
SIYA
IMO 9442108
|
10,475 | 2007 |
11.3
|
B |
| 735 |
CHELSEA-2
IMO 9314442
|
5,457 | 2005 |
11.3
|
B |
| 737 |
EKMEN GLORY
IMO 9384186
|
8,555 | 2007 |
11.3
|
B |
| 736 |
UAL CASTLE
IMO 9626168
|
11,183 | 2013 |
11.3
|
B |
| 738 |
FWN ANTARCTIC
IMO 9970521
|
12,539 | 2025 |
11.3
|
B |
| 739 |
GM YONGAN
IMO 9509683
|
33,249 | 2010 |
11.3
|
B |
| 740 |
LONGEARTH
IMO 9988114
|
8,730 | 2025 |
11.4
|
B |
| 741 |
SH EXPRESS
IMO 9085443
|
8,177 | 1994 |
11.4
|
B |
| 742 |
EDENBORG
IMO 9463449
|
11,199 | 2010 |
11.4
|
B |
| 744 |
ARKLOW ACCORD
IMO 9851945
|
8,543 | 2020 |
11.4
|
B |
| 743 |
LONGERA
IMO 9988097
|
8,797 | 2024 |
11.4
|
B |
| 745 |
TIARA
IMO 9437804
|
6,060 | 2008 |
11.4
|
B |
| 746 |
STINNES PASSAT
IMO 9473248
|
17,299 | 2011 |
11.4
|
B |
| 747 |
REBECCA
IMO 9437787
|
6,060 | 2008 |
11.4
|
B |
| 748 |
HELME
IMO 9504140
|
11,023 | 2011 |
11.4
|
B |
| 749 |
KFS MERYEM ANA
IMO 9575888
|
10,700 | 2010 |
11.5
|
B |
| 750 |
ALICIA
IMO 1034321
|
12,500 | 2015 |
11.5
|
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.