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 |
|---|---|---|---|---|---|
| 2301 |
GULF BLUE
IMO 9125073
|
4,444 | 1997 |
24.3
|
E |
| 2302 |
HAV SKANDIC
IMO 8719114
|
3,090 | 1993 |
24.4
|
E |
| 2303 |
WILSON MONSOON
IMO 9163582
|
2,780 | 1997 |
24.5
|
E |
| 2304 |
COE GISELA
IMO 8513314
|
1,815 | 1985 |
24.5
|
E |
| 2305 |
HJORDIS
IMO 9126235
|
6,904 | 1996 |
24.5
|
E |
| 2306 |
SKOG
IMO 8912039
|
3,728 | 1991 |
24.6
|
E |
| 2307 |
FIONA B
IMO 9574303
|
3,500 | 2012 |
24.8
|
E |
| 2308 |
GULF ANGEL
IMO 9125059
|
4,454 | 1996 |
24.9
|
E |
| 2309 |
BBC FUJI
IMO 9508419
|
9,266 | 2011 |
24.9
|
E |
| 2310 |
JUNE
IMO 9155688
|
2,100 | 1997 |
24.9
|
E |
| 2311 |
BBC VESUVIUS
IMO 9508471
|
9,310 | 2012 |
24.9
|
E |
| 2312 |
INDUSTRIAL DOLPHIN
IMO 9360192
|
7,996 | 2007 |
24.9
|
E |
| 2313 |
EMS CALYPSO
IMO 9557393
|
2,600 | 2012 |
25.0
|
E |
| 2314 |
MALIK ARCTICA
IMO 9618135
|
8,438 | 2017 |
25.0
|
E |
| 2315 |
SCHILLPLATE
IMO 9505285
|
3,175 | 2009 |
25.1
|
E |
| 2316 |
WILSON BERGEN
IMO 9557408
|
2,595 | 2016 |
25.1
|
E |
| 2317 |
BORKUM
IMO 9457153
|
5,489 | 2012 |
25.1
|
E |
| 2318 |
ANA-N
IMO 9416850
|
3,301 | 2008 |
25.3
|
E |
| 2319 |
NINA B
IMO 9213703
|
1,802 | 2000 |
25.3
|
E |
| 2320 |
RIKKE B
IMO 9574315
|
3,500 | 2012 |
25.4
|
E |
| 2321 |
BBC SCANDINAVIA
IMO 9362633
|
7,534 | 2007 |
25.4
|
E |
| 2322 |
CARTEN ELINA
IMO 8713653
|
3,727 | 1989 |
25.6
|
E |
| 2323 |
RIX MUNTE
IMO 9191254
|
4,433 | 1998 |
25.6
|
E |
| 2324 |
FRIENDLAND
IMO 9246906
|
4,684 | 2002 |
25.6
|
E |
| 2325 |
GANDA
IMO 9298129
|
2,637 | 2003 |
25.6
|
E |
| 2326 |
YUSUF BEY
IMO 9139127
|
4,766 | 1997 |
25.7
|
E |
| 2327 |
HOHE BANK
IMO 9505302
|
3,176 | 2010 |
25.8
|
E |
| 2328 |
LANGEOOG
IMO 9506136
|
5,463 | 2013 |
25.9
|
E |
| 2329 |
NORRBOTTEN
IMO 9191931
|
5,527 | 2001 |
25.9
|
E |
| 2330 |
HILDA B
IMO 9466233
|
3,500 | 2011 |
25.9
|
E |
| 2331 |
BBC EVEREST
IMO 9508407
|
9,310 | 2011 |
26.0
|
E |
| 2332 |
SPIEKEROOG
IMO 9506148
|
5,488 | 2013 |
26.0
|
E |
| 2333 |
MAY B
IMO 9138757
|
2,398 | 1996 |
26.1
|
E |
| 2334 |
ARINA
IMO 9173446
|
5,001 | 1989 |
26.1
|
E |
| 2335 |
WILSON ROTTERDAM
IMO 9557381
|
2,600 | 2017 |
26.1
|
E |
| 2336 |
WILSON SAAR
IMO 9125841
|
1,687 | 1996 |
26.2
|
E |
| 2337 |
TALINA B
IMO 9466221
|
3,500 | 2010 |
26.2
|
E |
| 2338 |
SCOT BAY
IMO 9243930
|
3,154 | 2001 |
26.3
|
E |
| 2339 |
PANORMITIS
IMO 8509038
|
1,533 | 1985 |
26.4
|
E |
| 2340 |
SCOT MARINER
IMO 9243916
|
3,313 | 2001 |
26.4
|
E |
| 2341 |
CONSTANCE
IMO 9505338
|
3,196 | 2011 |
26.4
|
E |
| 2342 |
SCAN FJELL
IMO 8405878
|
3,040 | 1985 |
26.5
|
E |
| 2343 |
BBC NAPLES
IMO 9484223
|
9,775 | 2010 |
26.6
|
E |
| 2344 |
MARIANNE DANICA
IMO 9006241
|
2,200 | 1993 |
26.6
|
E |
| 2345 |
ATLANTIS
IMO 8721533
|
3,337 | 1988 |
26.7
|
E |
| 2346 |
LAURA
IMO 9126223
|
6,940 | 1996 |
26.9
|
E |
| 2347 |
SONORO
IMO 9199397
|
4,077 | 2000 |
26.9
|
E |
| 2348 |
TITUS
IMO 9195470
|
4,299 | 2006 |
26.9
|
E |
| 2349 |
NORDERNEY
IMO 9506124
|
5,475 | 2012 |
27.1
|
E |
| 2350 |
MOHSEN
IMO 8703270
|
7,443 | 1987 |
27.1
|
E |
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.