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 |
|---|---|---|---|---|---|
| 1002 |
SIDER BILBAO
IMO 9338151
|
14,184 | 2007 |
13.4
|
C |
| 1001 |
UNISTREAM
IMO 9484235
|
9,700 | 2010 |
13.4
|
C |
| 1004 |
MEHMET AGA
IMO 8914312
|
9,169 | 1989 |
13.4
|
C |
| 1003 |
ORIS PRINCESS
IMO 9119907
|
7,737 | 1994 |
13.4
|
C |
| 1005 |
KYA
IMO 9268837
|
6,951 | 2004 |
13.4
|
C |
| 1008 |
ELISA K.
IMO 9879064
|
5,180 | 2021 |
13.4
|
C |
| 1007 |
ATLANTICBORG
IMO 9466350
|
17,294 | 2012 |
13.4
|
C |
| 1006 |
STATENGRACHT
IMO 9288045
|
21,253 | 2004 |
13.4
|
C |
| 1009 |
MB PINTO
IMO 8822636
|
3,666 | 1989 |
13.4
|
C |
| 1010 |
BBC CHALLENGER
IMO 9369095
|
11,121 | 2008 |
13.4
|
C |
| 1011 |
VERTOM JOY
IMO 9706865
|
11,000 | 2023 |
13.4
|
C |
| 1012 |
VERTOM RIAN
IMO 9980095
|
5,735 | 2025 |
13.4
|
C |
| 1013 |
UAL OSPREY
IMO 9594315
|
8,690 | 2012 |
13.4
|
C |
| 1014 |
PERFECT
IMO 9371854
|
6,509 | 2009 |
13.4
|
C |
| 1015 |
UNDEN
IMO 9961910
|
5,048 | 2024 |
13.4
|
C |
| 1017 |
BBC NYHAVN
IMO 9559896
|
9,737 | 2012 |
13.4
|
C |
| 1016 |
ERNA SU
IMO 9037290
|
10,776 | 2002 |
13.4
|
C |
| 1018 |
HAPPY DELTA
IMO 9551935
|
18,276 | 2011 |
13.5
|
C |
| 1019 |
HAV PIKE
IMO 9106912
|
3,736 | 1994 |
13.5
|
C |
| 1020 |
C.EPSILON
IMO 9130212
|
4,211 | 1997 |
13.5
|
C |
| 1022 |
NOREN
IMO 9968255
|
5,211 | 2024 |
13.5
|
C |
| 1021 |
EMMA
IMO 9285433
|
5,745 | 2004 |
13.5
|
C |
| 1024 |
BAYMAR
IMO 1031551
|
5,991 | 2024 |
13.5
|
C |
| 1023 |
FAST OLIVIA
IMO 1029065
|
3,850 | 2025 |
13.5
|
C |
| 1026 |
PELAGICA
IMO 9453781
|
12,710 | 2010 |
13.5
|
C |
| 1025 |
LOA FORTUNE
IMO 9526265
|
24,322 | 2014 |
13.5
|
C |
| 1027 |
SPIEGELGRACHT
IMO 9197911
|
21,402 | 2000 |
13.5
|
C |
| 1029 |
KATHY C
IMO 9523940
|
6,799 | 2010 |
13.5
|
C |
| 1031 |
FIONA
IMO 9381419
|
8,109 | 2009 |
13.5
|
C |
| 1028 |
FREYJA W
IMO 9754422
|
12,245 | 2018 |
13.5
|
C |
| 1030 |
SVEN
IMO 9953949
|
3,808 | 2023 |
13.5
|
C |
| 1033 |
FATIH
IMO 9381421
|
8,591 | 2009 |
13.5
|
C |
| 1032 |
JAN D
IMO 9969510
|
3,625 | 2025 |
13.5
|
C |
| 1034 |
TRANSBAY
IMO 9187033
|
17,539 | 1999 |
13.6
|
C |
| 1036 |
VAASABORG
IMO 9196242
|
9,567 | 2000 |
13.6
|
C |
| 1035 |
DAY DREAM
IMO 9214721
|
6,477 | 2001 |
13.6
|
C |
| 1037 |
MADDOX
IMO 8908844
|
16,883 | 1995 |
13.6
|
C |
| 1039 |
BORE WIND
IMO 9892901
|
6,792 | 2022 |
13.6
|
C |
| 1038 |
BBC MANILA
IMO 9811995
|
12,325 | 2022 |
13.6
|
C |
| 1040 |
UAL COLOGNE
IMO 9681534
|
8,736 | 2014 |
13.6
|
C |
| 1041 |
ANKA SUN
IMO 9114701
|
4,782 | 1994 |
13.6
|
C |
| 1042 |
ELISABETH K
IMO 9879052
|
5,160 | 2021 |
13.6
|
C |
| 1045 |
BBC SEINE
IMO 9508380
|
16,968 | 2010 |
13.6
|
C |
| 1044 |
C. RIGEL
IMO 9199139
|
3,687 | 2003 |
13.6
|
C |
| 1043 |
SLETRINGEN
IMO 9911927
|
8,534 | 2021 |
13.6
|
C |
| 1048 |
SKY FEYZ
IMO 9116034
|
3,662 | 1995 |
13.6
|
C |
| 1047 |
UNISCOUT
IMO 9484194
|
9,823 | 2009 |
13.6
|
C |
| 1046 |
CPT. AHMAD II
IMO 9031430
|
4,258 | 1991 |
13.6
|
C |
| 1049 |
HEERENGRACHT
IMO 9435753
|
12,678 | 2009 |
13.6
|
C |
| 1050 |
NORDIC KYLIE
IMO 9357999
|
12,791 | 2005 |
13.6
|
C |
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.