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 |
|---|---|---|---|---|---|
| 301 |
BBC URANUS
IMO 9947768
|
40,297 | 2022 |
6.2
|
A |
| 302 |
V TAURUS
IMO 9496161
|
33,193 | 2010 |
6.2
|
A |
| 303 |
LADY SERRA
IMO 9449883
|
30,124 | 2010 |
6.2
|
A |
| 304 |
IRON LADY
IMO 9385099
|
32,283 | 2009 |
6.2
|
A |
| 306 |
SAGA VIKING
IMO 9233466
|
46,901 | 2002 |
6.2
|
A |
| 305 |
REESTBORG
IMO 9592563
|
23,317 | 2013 |
6.2
|
A |
| 308 |
BERGE ANNUPURI
IMO 9713193
|
34,536 | 2016 |
6.2
|
A |
| 307 |
21 HONOR
IMO 9495363
|
37,155 | 2012 |
6.2
|
A |
| 309 |
NORDIC MALMOE
IMO 9602679
|
35,843 | 2012 |
6.2
|
A |
| 310 |
SWORD LION
IMO 9136785
|
27,919 | 1996 |
6.2
|
A |
| 312 |
ACACIA
IMO 9597642
|
33,677 | 2008 |
6.2
|
A |
| 311 |
UBC SALAVERRY
IMO 9426881
|
33,305 | 2010 |
6.2
|
A |
| 314 |
FU HAI
IMO 9766657
|
31,777 | 2016 |
6.3
|
A |
| 313 |
PATRIA
IMO 9580053
|
32,069 | 2014 |
6.3
|
A |
| 315 |
HANA H
IMO 9143855
|
8,104 | 1998 |
6.3
|
A |
| 317 |
MELOI
IMO 9392119
|
33,355 | 2009 |
6.3
|
A |
| 316 |
ATHENA SAN
IMO 9623659
|
38,503 | 2011 |
6.3
|
A |
| 318 |
SEA FAITH
IMO 9655420
|
33,343 | 2014 |
6.3
|
A |
| 319 |
V LYRA
IMO 9539444
|
33,628 | 2012 |
6.3
|
A |
| 320 |
ECO MONEGASQUE
IMO 9701011
|
33,190 | 2013 |
6.3
|
A |
| 322 |
TIAN XI
IMO 9704764
|
38,098 | 2016 |
6.3
|
A |
| 321 |
ZIMRIDA
IMO 9380817
|
37,296 | 2008 |
6.3
|
A |
| 324 |
TIAN LE
IMO 9722730
|
37,994 | 2016 |
6.4
|
A |
| 323 |
ARIANDA
IMO 9537276
|
37,495 | 2010 |
6.4
|
A |
| 325 |
AMELIE
IMO 9647289
|
34,650 | 2013 |
6.4
|
A |
| 326 |
COOL BREEZE
IMO 9400930
|
32,283 | 2010 |
6.4
|
A |
| 327 |
LADY ZEHRA
IMO 9309617
|
31,734 | 2006 |
6.4
|
A |
| 329 |
ECO NEMESIS
IMO 9711913
|
33,375 | 2015 |
6.4
|
A |
| 328 |
SATURN J
IMO 9546174
|
33,478 | 2010 |
6.4
|
A |
| 330 |
TAN BINH 299
IMO 9459149
|
33,132 | 2011 |
6.4
|
A |
| 331 |
ERNA OLDENDORFF
IMO 9717670
|
38,613 | 2016 |
6.4
|
A |
| 332 |
UBC TAMPA
IMO 9416707
|
37,724 | 2009 |
6.4
|
A |
| 333 |
SHAMAN WISDOM
IMO 9563407
|
35,052 | 2010 |
6.4
|
A |
| 335 |
SSI MERAL HANIM
IMO 9491678
|
37,238 | 2011 |
6.4
|
A |
| 334 |
GRAIN WAY
IMO 9545560
|
23,000 | 2009 |
6.4
|
A |
| 337 |
CORINTHIAN SPIRE
IMO 9478482
|
32,154 | 2009 |
6.5
|
A |
| 336 |
K BEREKET
IMO 9370408
|
33,225 | 2008 |
6.5
|
A |
| 338 |
KAMENARI
IMO 9400942
|
32,326 | 2010 |
6.5
|
A |
| 339 |
BC LARA
IMO 9598024
|
38,494 | 2011 |
6.5
|
A |
| 340 |
EKATERINA
IMO 9641807
|
38,182 | 2013 |
6.5
|
A |
| 341 |
V CETUS
IMO 9370381
|
33,401 | 2008 |
6.5
|
A |
| 342 |
IWAMI
IMO 9414981
|
20,142 | 2009 |
6.5
|
A |
| 343 |
PLUTO
IMO 9432531
|
32,092 | 2014 |
6.5
|
A |
| 347 |
FIRST BROTHER
IMO 9266140
|
32,385 | 2003 |
6.5
|
A |
| 346 |
AMIRA MARYANA
IMO 9379650
|
32,029 | 2007 |
6.5
|
A |
| 345 |
NORDIC OSLO
IMO 9626601
|
35,866 | 2012 |
6.5
|
A |
| 344 |
KERASIA S
IMO 9496185
|
33,170 | 2011 |
6.5
|
A |
| 350 |
NOVI
IMO 9424120
|
34,044 | 2011 |
6.6
|
A |
| 349 |
GLOBAL ARSENAL
IMO 9363302
|
32,313 | 2008 |
6.6
|
A |
| 348 |
SIROCO
IMO 9317705
|
37,534 | 2006 |
6.6
|
A |
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.