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 |
|---|---|---|---|---|---|
| 902 |
SPRING
IMO 8408650
|
8,881 | 1985 |
12.7
|
B |
| 901 |
SEELAND
IMO 9228930
|
3,132 | 2001 |
12.7
|
B |
| 903 |
IANA
IMO 1030375
|
5,033 | 2025 |
12.7
|
B |
| 904 |
ARKLOW BAY
IMO 9638771
|
8,660 | 2014 |
12.7
|
B |
| 906 |
NEULAND
IMO 9117959
|
3,189 | 1995 |
12.7
|
B |
| 905 |
ARKLOW MUSE
IMO 9509487
|
15,008 | 2013 |
12.7
|
B |
| 908 |
VECHTBORG
IMO 9160334
|
9,567 | 1998 |
12.7
|
B |
| 907 |
MARIE LEHMANN
IMO 9728772
|
6,343 | 2025 |
12.7
|
B |
| 909 |
IJZERBORG
IMO 9456733
|
12,032 | 2010 |
12.7
|
B |
| 910 |
ONEGO CAPRI
IMO 9245275
|
10,273 | 2002 |
12.7
|
B |
| 911 |
ARKLOW BRAVE
IMO 9638800
|
8,661 | 2015 |
12.7
|
B |
| 912 |
KATRE
IMO 9376452
|
7,126 | 2007 |
12.7
|
B |
| 913 |
STINNES ZEPHIR
IMO 9473236
|
17,273 | 2011 |
12.7
|
B |
| 915 |
ECO TRUST
IMO 9933925
|
9,110 | 2023 |
12.7
|
B |
| 914 |
ACAPELLA
IMO 9039092
|
3,691 | 1994 |
12.7
|
B |
| 916 |
SULTAN ATASOY
IMO 9565467
|
6,634 | 2010 |
12.7
|
B |
| 917 |
VENTUS
IMO 9368625
|
6,063 | 2006 |
12.8
|
B |
| 919 |
VIRGINIABORG
IMO 9234290
|
9,861 | 2001 |
12.8
|
B |
| 918 |
MAGPIE
IMO 9188922
|
10,335 | 2007 |
12.8
|
B |
| 920 |
ARKLOW ARTIST
IMO 9851983
|
8,543 | 2021 |
12.8
|
B |
| 921 |
JUTLAND
IMO 9142497
|
3,155 | 1997 |
12.8
|
B |
| 924 |
BBC VOLGA
IMO 9436329
|
17,303 | 2009 |
12.8
|
B |
| 923 |
ARKLOW BANK
IMO 9638769
|
8,660 | 2014 |
12.8
|
B |
| 922 |
HAV DOLPHIN
IMO 9073854
|
3,041 | 1993 |
12.8
|
B |
| 925 |
CLAUDE A. DESGAGNES
IMO 9488059
|
12,671 | 2011 |
12.8
|
B |
| 927 |
JSP TORNØ
IMO 9968190
|
5,228 | 2023 |
12.8
|
B |
| 926 |
ARKLOW BREEZE
IMO 9638812
|
8,661 | 2015 |
12.8
|
B |
| 928 |
ARKLOW MILL
IMO 9440265
|
14,998 | 2010 |
12.8
|
B |
| 929 |
GWEN
IMO 9402067
|
12,693 | 2008 |
12.8
|
B |
| 930 |
SIFTERI
IMO 9452323
|
10,588 | 2008 |
12.8
|
B |
| 931 |
WILSON ECO II
IMO 1052141
|
3,800 | 2025 |
12.8
|
B |
| 932 |
VEGA CLARA
IMO 1028566
|
3,777 | 2025 |
12.9
|
B |
| 933 |
ANGELO
IMO 9180877
|
6,999 | 1999 |
12.9
|
B |
| 935 |
NURI SONAY
IMO 9310202
|
14,888 | 2006 |
12.9
|
B |
| 934 |
AL UDEID
IMO 9294965
|
10,508 | 2004 |
12.9
|
B |
| 937 |
IRENA
IMO 9306380
|
8,153 | 2005 |
12.9
|
B |
| 936 |
MANISA SOFIA
IMO 9428396
|
12,500 | 2011 |
12.9
|
B |
| 938 |
YM AMAZON
IMO 9622758
|
10,978 | 2013 |
12.9
|
B |
| 939 |
VANCOUVERBORG
IMO 9213741
|
9,829 | 2001 |
12.9
|
B |
| 940 |
BBC RHINE
IMO 9539377
|
17,809 | 2013 |
12.9
|
B |
| 941 |
KELLY C
IMO 9558024
|
6,794 | 2010 |
12.9
|
B |
| 942 |
LIDAN
IMO 9924730
|
5,080 | 2024 |
12.9
|
B |
| 943 |
BBC HUDSON
IMO 9435868
|
17,327 | 2009 |
12.9
|
B |
| 946 |
LONGEDEN
IMO 9988126
|
8,467 | 2025 |
12.9
|
B |
| 945 |
FWN SKY
IMO 9721633
|
10,521 | 2015 |
12.9
|
B |
| 944 |
BIG RISE
IMO 9509267
|
8,441 | 2006 |
12.9
|
B |
| 948 |
SAIMAAGRACHT
IMO 9288069
|
23,741 | 2005 |
13.0
|
B |
| 947 |
AUGUSTA LUNA
IMO 9480124
|
17,371 | 2011 |
13.0
|
B |
| 949 |
VICTORIABORG
IMO 9234276
|
9,826 | 2001 |
13.0
|
B |
| 950 |
UAL TEXAS
IMO 9542350
|
8,600 | 2013 |
13.0
|
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.