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 2024. 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 |
|---|---|---|---|---|---|
| 351 |
ATLANTIC ISLAND
IMO 9628245
|
33,680 | 2012 |
7.0
|
B |
| 352 |
GLOBAL ARSENAL
IMO 9363302
|
32,313 | 2008 |
7.1
|
B |
| 353 |
TIAN EN
IMO 9774587
|
37,125 | 2017 |
7.1
|
B |
| 354 |
PRINCE HADI
IMO 9125217
|
26,412 | 1997 |
7.1
|
B |
| 356 |
BALTIC HARMONY
IMO 9766657
|
31,777 | 2016 |
7.1
|
B |
| 355 |
ATLANTIC HARMONY
IMO 9613812
|
31,776 | 2017 |
7.1
|
B |
| 357 |
AAL PARIS
IMO 9594494
|
33,287 | 2011 |
7.1
|
B |
| 358 |
PRINCESS LAYLA
IMO 9149677
|
29,501 | 1998 |
7.1
|
B |
| 360 |
BC VANESSA
IMO 9426855
|
31,755 | 2010 |
7.1
|
B |
| 359 |
CHIPOL CHANGJIANG
IMO 9703538
|
36,475 | 2013 |
7.1
|
B |
| 361 |
REGGEBORG
IMO 9592575
|
23,296 | 2014 |
7.2
|
B |
| 362 |
HARAR
IMO 9617399
|
27,976 | 2010 |
7.2
|
B |
| 363 |
AGIA DOXA
IMO 9467976
|
33,261 | 2010 |
7.2
|
B |
| 364 |
MJ MAYA
IMO 9261011
|
31,842 | 2002 |
7.2
|
B |
| 365 |
NAZMI C
IMO 9577769
|
37,534 | 2012 |
7.2
|
B |
| 367 |
HAAGA
IMO 9797632
|
25,600 | 2018 |
7.2
|
B |
| 366 |
ERKUL S
IMO 9177789
|
13,347 | 1999 |
7.2
|
B |
| 368 |
CORELLA ARROW
IMO 9385477
|
72,863 | 2009 |
7.2
|
B |
| 369 |
AL ZAHRAA
IMO 9255062
|
31,770 | 2002 |
7.2
|
B |
| 370 |
KAMENARI
IMO 9400942
|
32,326 | 2010 |
7.3
|
B |
| 372 |
BR MIRAL
IMO 9149732
|
23,923 | 1997 |
7.3
|
B |
| 371 |
INOI
IMO 9400928
|
32,301 | 2010 |
7.3
|
B |
| 373 |
GRAIN WAY
IMO 9545560
|
23,000 | 2009 |
7.3
|
B |
| 374 |
ALBATROS I
IMO 9540168
|
25,632 | 2010 |
7.3
|
B |
| 375 |
ESRA C
IMO 9379662
|
33,257 | 2008 |
7.3
|
B |
| 376 |
AVRA.GR
IMO 9755866
|
34,930 | 2016 |
7.3
|
B |
| 377 |
MANTA MELEK
IMO 9536856
|
33,622 | 2011 |
7.4
|
B |
| 378 |
AEGEAN SPIRE
IMO 9370381
|
33,401 | 2008 |
7.4
|
B |
| 379 |
DELPHINUS
IMO 9536428
|
35,732 | 2011 |
7.4
|
B |
| 380 |
ORCINUS
IMO 9467952
|
34,094 | 2010 |
7.5
|
B |
| 381 |
SERVET ANA
IMO 9443774
|
30,124 | 2006 |
7.5
|
B |
| 382 |
BOKA
IMO 9658800
|
33,382 | 2013 |
7.5
|
B |
| 383 |
TRANSNORDIC
IMO 9602174
|
34,827 | 2012 |
7.5
|
B |
| 384 |
TRANSASIA
IMO 9600607
|
26,391 | 2011 |
7.6
|
B |
| 386 |
ROERBORG
IMO 9592599
|
23,260 | 2014 |
7.6
|
B |
| 385 |
CAPTAIN CHRISTOS
IMO 9589762
|
38,225 | 2011 |
7.6
|
B |
| 387 |
LADY RANIA
IMO 9123099
|
29,538 | 1996 |
7.6
|
B |
| 388 |
VIIKKI
IMO 9797620
|
25,600 | 2018 |
7.6
|
B |
| 390 |
ESSAYRA
IMO 9735452
|
35,084 | 2016 |
7.6
|
B |
| 389 |
ECO WILDFIRE
IMO 9652492
|
33,296 | 2013 |
7.6
|
B |
| 391 |
BC CALLISTO
IMO 9400916
|
32,280 | 2010 |
7.7
|
B |
| 392 |
ECO CROSSFIRE
IMO 9597654
|
33,649 | 2012 |
7.7
|
B |
| 394 |
AMIRA MARYANA
IMO 9379650
|
32,029 | 2007 |
7.7
|
B |
| 393 |
NORTH GATE
IMO 9363285
|
32,250 | 2008 |
7.7
|
B |
| 395 |
DU JUAN SONG
IMO 9608805
|
27,438 | 2011 |
7.7
|
B |
| 396 |
DA GUI
IMO 9768564
|
28,606 | 2017 |
7.7
|
B |
| 397 |
CARIBBEAN HARMONY
IMO 9458468
|
31,777 | 2017 |
7.8
|
B |
| 398 |
AMALIA
IMO 9973327
|
14,389 | 2024 |
7.8
|
B |
| 400 |
PNOI
IMO 9400887
|
32,282 | 2009 |
7.8
|
B |
| 399 |
VICTORIA
IMO 9336828
|
50,223 | 2006 |
7.8
|
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 2024 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.