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 |
|---|---|---|---|---|---|
| 250 |
MANTA NILGUN
IMO 9553024
|
33,671 | 2011 |
6.1
|
B |
| 249 |
STAR ISTIND
IMO 9182954
|
46,428 | 1999 |
6.1
|
B |
| 253 |
IVS SPARROWHAWK
IMO 9712656
|
33,421 | 2014 |
6.1
|
B |
| 254 |
ERNST OLDENDORFF
IMO 9702637
|
38,599 | 2015 |
6.2
|
B |
| 255 |
BERGE DAISETSU
IMO 9713179
|
34,533 | 2015 |
6.2
|
B |
| 257 |
IVS THANDA
IMO 9701009
|
37,715 | 2015 |
6.2
|
B |
| 256 |
STAR GATE
IMO 9400875
|
32,280 | 2009 |
6.2
|
B |
| 258 |
TEAL BAY
IMO 9343637
|
32,327 | 2007 |
6.2
|
B |
| 259 |
SSI MAGNIFICENT
IMO 9391828
|
32,258 | 2009 |
6.2
|
B |
| 261 |
ISOLDANA
IMO 9186235
|
44,691 | 2000 |
6.2
|
B |
| 260 |
UBC TILBURY
IMO 9416721
|
37,702 | 2010 |
6.2
|
B |
| 262 |
CENDA
IMO 9263071
|
46,834 | 2004 |
6.2
|
B |
| 264 |
BASIC ISLAND
IMO 9640061
|
38,037 | 2012 |
6.2
|
B |
| 263 |
IVS KNOT
IMO 9459137
|
33,143 | 2010 |
6.2
|
B |
| 265 |
V TAURUS
IMO 9496161
|
33,193 | 2010 |
6.2
|
B |
| 266 |
SUPERNOVA B
IMO 9610212
|
36,261 | 2012 |
6.2
|
B |
| 268 |
ERLYNE
IMO 9382736
|
50,640 | 2010 |
6.2
|
B |
| 267 |
TIAN ZHEN
IMO 9722728
|
38,007 | 2016 |
6.2
|
B |
| 269 |
BAM PROTEUS
IMO 9343625
|
33,782 | 2007 |
6.3
|
B |
| 270 |
IMPRESSION BAY
IMO 9722431
|
37,470 | 2015 |
6.3
|
B |
| 271 |
NEPTULUS
IMO 9473705
|
33,706 | 2012 |
6.3
|
B |
| 272 |
UBC SANTOS
IMO 9376000
|
31,569 | 2008 |
6.3
|
B |
| 273 |
COOL BREEZE
IMO 9400930
|
32,283 | 2010 |
6.3
|
B |
| 274 |
UBC TAMPA
IMO 9416707
|
37,724 | 2009 |
6.3
|
B |
| 275 |
ALBERTO TOPIC
IMO 9728473
|
34,356 | 2015 |
6.3
|
B |
| 276 |
IRON LADY
IMO 9385099
|
32,283 | 2009 |
6.4
|
B |
| 277 |
SIDER OLYMPIA
IMO 9641807
|
38,182 | 2013 |
6.4
|
B |
| 278 |
ZIMRIDA
IMO 9380817
|
37,296 | 2008 |
6.4
|
B |
| 281 |
JAUNTY JENNY
IMO 9539444
|
33,628 | 2012 |
6.4
|
B |
| 280 |
BULK KING
IMO 9195298
|
49,999 | 1999 |
6.4
|
B |
| 279 |
CYCLADIC SPIRE
IMO 9609330
|
32,976 | 2013 |
6.4
|
B |
| 282 |
TEAM BRAVO
IMO 9539341
|
33,642 | 2012 |
6.4
|
B |
| 283 |
STAR KILIMANJARO
IMO 9396139
|
49,862 | 2009 |
6.4
|
B |
| 284 |
PRINCESSE OUI
IMO 9711913
|
33,375 | 2015 |
6.5
|
B |
| 285 |
IRIDA GS
IMO 9614311
|
32,836 | 2013 |
6.5
|
B |
| 286 |
BALKAN MARIN
IMO 9416434
|
38,070 | 2010 |
6.5
|
B |
| 287 |
PETRA
IMO 9597630
|
33,688 | 2011 |
6.5
|
B |
| 290 |
PARLA
IMO 9537977
|
35,732 | 2011 |
6.5
|
B |
| 289 |
UBC SANTA MARTA
IMO 9380805
|
31,583 | 2008 |
6.5
|
B |
| 288 |
NOVI
IMO 9424120
|
34,044 | 2011 |
6.5
|
B |
| 291 |
TIAN FU
IMO 9704738
|
38,146 | 2015 |
6.5
|
B |
| 292 |
SODA
IMO 9385221
|
19,230 | 2008 |
6.5
|
B |
| 293 |
TIAN YOU
IMO 9823625
|
37,077 | 2018 |
6.5
|
B |
| 295 |
SIDER ONDA
IMO 9700316
|
40,482 | 2015 |
6.5
|
B |
| 294 |
V PEGASUS
IMO 9370422
|
33,248 | 2008 |
6.5
|
B |
| 296 |
ORCUN C
IMO 9499436
|
33,358 | 2012 |
6.6
|
B |
| 298 |
SARACA
IMO 9300764
|
37,832 | 2005 |
6.6
|
B |
| 297 |
TIAN XI
IMO 9704764
|
38,098 | 2016 |
6.6
|
B |
| 299 |
GLORIEUSE
IMO 9646429
|
38,338 | 2012 |
6.6
|
B |
| 300 |
TIAN HUI
IMO 9774599
|
37,130 | 2017 |
6.6
|
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.