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 |
|---|---|---|---|---|---|
| 1551 |
SCOT LEADER
IMO 9963267
|
4,794 | 2024 |
16.1
|
D |
| 1552 |
WILSON NORTH
IMO 9430947
|
8,691 | 2010 |
16.1
|
D |
| 1553 |
HERMAS
IMO 9224166
|
4,903 | 2000 |
16.1
|
D |
| 1554 |
WILSON BRUGGE
IMO 9150494
|
3,866 | 1997 |
16.1
|
D |
| 1555 |
GULF
IMO 8937352
|
4,325 | 2000 |
16.1
|
D |
| 1556 |
WILSON BILBAO
IMO 9014705
|
3,944 | 1992 |
16.1
|
D |
| 1557 |
MOHAMAD
IMO 8919960
|
7,900 | 1990 |
16.1
|
D |
| 1558 |
HARUN
IMO 9361380
|
6,665 | 2008 |
16.1
|
D |
| 1559 |
SWEDICA HAV
IMO 8605478
|
2,279 | 1986 |
16.1
|
D |
| 1560 |
WOLF
IMO 9306407
|
7,609 | 2006 |
16.1
|
D |
| 1561 |
KERLI
IMO 9125695
|
4,666 | 1996 |
16.1
|
D |
| 1562 |
MANISA BELLA / LENNEBORG
IMO 9421075
|
8,668 | 2008 |
16.1
|
D |
| 1563 |
SALAR
IMO 8801125
|
3,432 | 1989 |
16.1
|
D |
| 1564 |
KRISTELLA
IMO 9187928
|
7,120 | 2000 |
16.1
|
D |
| 1565 |
KATRIN
IMO 9155987
|
5,014 | 1996 |
16.1
|
D |
| 1566 |
GEORGIOS ALEXIOS
IMO 9433511
|
5,241 | 2009 |
16.1
|
D |
| 1567 |
CDRY WHITE
IMO 9365506
|
8,537 | 2010 |
16.1
|
D |
| 1568 |
BLAIR MCKEIL
IMO 9546045
|
14,906 | 2010 |
16.1
|
D |
| 1569 |
SCOT TRADER
IMO 9728784
|
4,787 | 2023 |
16.1
|
D |
| 1570 |
OCEAN GLADIATOR
IMO 9418987
|
19,382 | 2010 |
16.1
|
D |
| 1571 |
MARTENITSA
IMO 9138733
|
3,221 | 1996 |
16.1
|
D |
| 1572 |
FRI LIEPAJA
IMO 9344514
|
4,933 | 2006 |
16.1
|
D |
| 1573 |
OPTIMA
IMO 9210244
|
9,022 | 2000 |
16.1
|
D |
| 1574 |
MARIETJE DEBORAH
IMO 9481594
|
8,486 | 2011 |
16.1
|
D |
| 1575 |
ARTVIN
IMO 8917869
|
2,644 | 1990 |
16.2
|
D |
| 1576 |
FRI GDANSK
IMO 9344502
|
4,933 | 2006 |
16.2
|
D |
| 1577 |
EZMOCE
IMO 9124873
|
3,660 | 1996 |
16.2
|
D |
| 1578 |
VENTUMAR
IMO 9956288
|
5,399 | 2025 |
16.2
|
D |
| 1579 |
ARGO
IMO 9421128
|
7,816 | 2009 |
16.2
|
D |
| 1580 |
SIDER IBIZA
IMO 9861524
|
7,585 | 2020 |
16.2
|
D |
| 1581 |
ZOYA S
IMO 1064821
|
8,307 | 2025 |
16.2
|
D |
| 1582 |
BRIZA
IMO 9286815
|
6,917 | 2003 |
16.2
|
D |
| 1583 |
RUBYLAND
IMO 9518995
|
5,724 | 2011 |
16.2
|
D |
| 1584 |
SKYLGE
IMO 9508809
|
7,644 | 2010 |
16.2
|
D |
| 1585 |
PRINSENGRACHT
IMO 9448372
|
19,866 | 2011 |
16.2
|
D |
| 1586 |
EMS LION
IMO 9978901
|
4,400 | 2024 |
16.2
|
D |
| 1587 |
WILSON POLICE
IMO 9373539
|
4,998 | 2007 |
16.2
|
D |
| 1588 |
CDRY BLACK
IMO 9504633
|
8,537 | 2011 |
16.2
|
D |
| 1589 |
AVONBORG
IMO 9466362
|
17,294 | 2012 |
16.2
|
D |
| 1590 |
JOY X
IMO 9428774
|
7,800 | 2007 |
16.2
|
D |
| 1591 |
MORGENSTOND II
IMO 9367073
|
12,102 | 2007 |
16.2
|
D |
| 1592 |
NASSAUBORG
IMO 9248564
|
20,530 | 2006 |
16.2
|
D |
| 1593 |
AYA
IMO 9516557
|
6,840 | 2008 |
16.3
|
D |
| 1594 |
WILSON PLYMOUTH
IMO 9344497
|
4,960 | 2006 |
16.3
|
D |
| 1595 |
RECEP KURU
IMO 9040948
|
5,048 | 1994 |
16.3
|
D |
| 1596 |
DENIZ STAR
IMO 1071472
|
8,290 | 2025 |
16.3
|
D |
| 1597 |
RIX DELTA
IMO 9195767
|
3,850 | 2003 |
16.3
|
D |
| 1598 |
RIX VENTURE
IMO 9238399
|
4,933 | 2002 |
16.3
|
D |
| 1599 |
AHMET AGAOGLU
IMO 9082001
|
4,304 | 1994 |
16.3
|
D |
| 1600 |
AMBASSADOR S
IMO 9006370
|
3,710 | 1994 |
16.3
|
D |
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.