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 |
|---|---|---|---|---|---|
| 751 |
ARKLOW ACE
IMO 9851957
|
8,543 | 2020 |
11.5
|
B |
| 752 |
EIRA
IMO 9225299
|
19,625 | 2001 |
11.5
|
B |
| 753 |
AAL KEMBLA
IMO 9498353
|
31,000 | 2011 |
11.5
|
B |
| 754 |
DA KANG
IMO 9608312
|
29,863 | 2013 |
11.5
|
B |
| 756 |
HOSEI FORTUNE
IMO 9542879
|
12,161 | 2009 |
11.6
|
B |
| 755 |
ICE CRYSTAL
IMO 9818321
|
6,706 | 2018 |
11.6
|
B |
| 757 |
BULKER BEE 10
IMO 9507087
|
13,784 | 2010 |
11.6
|
B |
| 759 |
AMAZONEBORG
IMO 9333541
|
17,355 | 2007 |
11.6
|
B |
| 758 |
EVANS SPIRIT
IMO 9327774
|
15,026 | 2007 |
11.6
|
B |
| 760 |
NANA MOON
IMO 9444170
|
11,224 | 2007 |
11.6
|
B |
| 762 |
SAVA
IMO 9158082
|
9,752 | 1999 |
11.6
|
B |
| 761 |
JOMI
IMO 9038397
|
4,258 | 1991 |
11.6
|
B |
| 764 |
LONGWAVE
IMO 9693109
|
10,714 | 2015 |
11.6
|
B |
| 763 |
BULKER BEE 11
IMO 9507075
|
13,625 | 2011 |
11.6
|
B |
| 765 |
BOHA WITTENBERGEN
IMO 9014676
|
3,776 | 1992 |
11.7
|
B |
| 766 |
ARETHA
IMO 1034333
|
12,246 | 2025 |
11.7
|
B |
| 767 |
BBC PHILIPPINES
IMO 9963401
|
12,422 | 2023 |
11.7
|
B |
| 769 |
LADY SHAM
IMO 9171383
|
9,802 | 2001 |
11.7
|
B |
| 768 |
MANASSA MIRA M
IMO 9081992
|
8,816 | 1997 |
11.7
|
B |
| 770 |
TOYA
IMO 9368106
|
3,567 | 2005 |
11.7
|
B |
| 771 |
MARVELLA
IMO 9545493
|
6,825 | 2009 |
11.7
|
B |
| 773 |
NORDIC CRYSTAL
IMO 9931496
|
6,458 | 2022 |
11.7
|
B |
| 775 |
MARFAAM
IMO 9526100
|
8,429 | 2011 |
11.7
|
B |
| 772 |
UNISTAR
IMO 9559901
|
9,688 | 2012 |
11.7
|
B |
| 776 |
MILA
IMO 9501681
|
11,383 | 2013 |
11.7
|
B |
| 774 |
FWN SPIRIT
IMO 9735220
|
10,546 | 2017 |
11.7
|
B |
| 777 |
LADY SEMA
IMO 9233624
|
16,190 | 2001 |
11.7
|
B |
| 779 |
TEVFIK BEY
IMO 9383326
|
8,317 | 2007 |
11.7
|
B |
| 778 |
AMERICABORG
IMO 9365659
|
17,356 | 2007 |
11.7
|
B |
| 780 |
BBC GENOA
IMO 9885300
|
13,417 | 2024 |
11.7
|
B |
| 781 |
FWN SPACE
IMO 9735232
|
10,546 | 2018 |
11.8
|
B |
| 782 |
NEW GEMINI
IMO 9523756
|
5,269 | 2008 |
11.8
|
B |
| 785 |
TIDAN
IMO 9988528
|
5,077 | 2025 |
11.8
|
B |
| 784 |
LONGEON
IMO 9988102
|
8,797 | 2024 |
11.8
|
B |
| 783 |
VECTIS PRIDE
IMO 9626132
|
11,183 | 2012 |
11.8
|
B |
| 786 |
ANNA 2005
IMO 9369459
|
5,167 | 2004 |
11.8
|
B |
| 787 |
BOZKURT
IMO 9171371
|
9,861 | 2000 |
11.8
|
B |
| 788 |
WAEL K
IMO 9001148
|
8,059 | 1994 |
11.8
|
B |
| 789 |
MONA
IMO 9101534
|
7,825 | 1995 |
11.8
|
B |
| 790 |
FIRAT
IMO 8310384
|
6,378 | 1983 |
11.9
|
B |
| 791 |
ALAMOSBORG
IMO 9466348
|
17,294 | 2011 |
11.9
|
B |
| 792 |
BR BROTHER
IMO 8418265
|
8,890 | 1985 |
11.9
|
B |
| 793 |
KAREEM JUNIOR
IMO 9133575
|
6,243 | 1995 |
11.9
|
B |
| 794 |
ALBANYBORG
IMO 9466300
|
17,294 | 2010 |
11.9
|
B |
| 795 |
EEMSBORG
IMO 9423748
|
11,287 | 2009 |
12.0
|
B |
| 798 |
UHL FLAIR
IMO 9897133
|
17,113 | 2021 |
12.0
|
B |
| 797 |
INDUSTRIAL SWIFT
IMO 9741152
|
12,337 | 2017 |
12.0
|
B |
| 796 |
PRINCE HASAN
IMO 9102825
|
8,180 | 1994 |
12.0
|
B |
| 799 |
SNP GALAXY
IMO 9546930
|
4,502 | 2009 |
12.0
|
B |
| 800 |
GERD
IMO 9052707
|
4,791 | 1993 |
12.0
|
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.