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 |
|---|---|---|---|---|---|
| 603 |
TIMBERLAND
IMO 9204790
|
20,406 | 2000 |
9.8
|
B |
| 602 |
VERTOM TOMMA
IMO 9938743
|
7,281 | 2023 |
9.8
|
B |
| 601 |
BRAVE WARRIOR
IMO 7208728
|
6,336 | 1972 |
9.8
|
B |
| 604 |
LAKE ERIE
IMO 9283540
|
27,781 | 2004 |
9.8
|
B |
| 605 |
KING JOY
IMO 9537472
|
16,807 | 2009 |
9.8
|
B |
| 606 |
ADAPEARL
IMO 9539432
|
12,427 | 2011 |
9.9
|
B |
| 607 |
NORD LOTUS
IMO 9742390
|
16,963 | 2015 |
9.9
|
B |
| 608 |
FLEVOBORG
IMO 9419292
|
14,603 | 2010 |
9.9
|
B |
| 609 |
DA DE
IMO 9608403
|
29,572 | 2014 |
9.9
|
B |
| 610 |
ALPPILA
IMO 9381706
|
20,499 | 2011 |
9.9
|
B |
| 611 |
MUZAFFER ANA
IMO 9554157
|
12,447 | 2010 |
9.9
|
B |
| 613 |
FIVELBORG
IMO 9419307
|
14,575 | 2010 |
9.9
|
B |
| 612 |
PROGRESS IV
IMO 8358130
|
7,400 | 2006 |
9.9
|
B |
| 614 |
BOHWA AMOY
IMO 9300958
|
10,084 | 2005 |
9.9
|
B |
| 615 |
DA XIN
IMO 9608427
|
29,565 | 2014 |
10.0
|
B |
| 616 |
THAMESBORG
IMO 9546459
|
21,359 | 2013 |
10.0
|
B |
| 618 |
JOY LINE
IMO 9370094
|
14,376 | 2007 |
10.0
|
B |
| 617 |
PRINCESS MARIAM
IMO 9407005
|
7,004 | 2006 |
10.0
|
B |
| 620 |
ARIF AMCA
IMO 9616084
|
11,086 | 2012 |
10.0
|
B |
| 619 |
CHIPOLBROK SUN
IMO 9272230
|
30,435 | 2004 |
10.0
|
B |
| 621 |
PADEREWSKI
IMO 9731389
|
31,673 | 2016 |
10.1
|
B |
| 622 |
SUNDRY
IMO 9045651
|
7,321 | 2000 |
10.1
|
B |
| 625 |
VERACRUZ
IMO 9521849
|
19,596 | 2012 |
10.1
|
B |
| 624 |
TOPTERIX
IMO 9630016
|
10,487 | 2011 |
10.1
|
B |
| 623 |
ASH BALTIC
IMO 9606493
|
13,121 | 2011 |
10.1
|
B |
| 626 |
ADNAN N
IMO 9334973
|
11,776 | 2006 |
10.1
|
B |
| 627 |
NOWOWIEJSKI
IMO 9710189
|
31,664 | 2016 |
10.1
|
B |
| 628 |
ROYAL II
IMO 9355109
|
13,721 | 2007 |
10.2
|
B |
| 630 |
SAADET
IMO 9522063
|
12,198 | 2009 |
10.2
|
B |
| 632 |
PRINCE JOY
IMO 9644251
|
22,983 | 2012 |
10.2
|
B |
| 629 |
SELECTA
IMO 9424807
|
14,030 | 2007 |
10.2
|
B |
| 631 |
SIDER TAYRONA
IMO 9728849
|
14,695 | 2015 |
10.2
|
B |
| 633 |
MATSUSHIRO
IMO 9477672
|
13,815 | 2009 |
10.2
|
B |
| 634 |
ANT
IMO 9412311
|
5,095 | 2006 |
10.3
|
B |
| 636 |
KARANFIL
IMO 9369162
|
12,616 | 2008 |
10.3
|
B |
| 635 |
FRASERBORG
IMO 9419319
|
14,583 | 2011 |
10.3
|
B |
| 637 |
SANTORINI
IMO 9181493
|
24,175 | 1998 |
10.3
|
B |
| 638 |
FWN ADRIATIC
IMO 9970533
|
12,544 | 2025 |
10.3
|
B |
| 640 |
ATA 2
IMO 9387669
|
6,555 | 2006 |
10.3
|
B |
| 639 |
WLADYSLAW ORKAN
IMO 9271925
|
30,435 | 2003 |
10.3
|
B |
| 643 |
YM EVEREST
IMO 9653812
|
16,717 | 2014 |
10.3
|
B |
| 642 |
LUCKY
IMO 9037305
|
10,605 | 2002 |
10.3
|
B |
| 641 |
TIBER RIVER
IMO 9650949
|
7,402 | 2014 |
10.3
|
B |
| 644 |
AKDENIZ S
IMO 9519377
|
9,161 | 2008 |
10.3
|
B |
| 645 |
IMMENSITY
IMO 9171395
|
10,979 | 2002 |
10.3
|
B |
| 646 |
BUYUFIX
IMO 9538957
|
8,488 | 2010 |
10.4
|
B |
| 647 |
ISMAIL S
IMO 9546007
|
12,952 | 2011 |
10.4
|
B |
| 648 |
EXEBORG
IMO 9650482
|
11,950 | 2013 |
10.4
|
B |
| 649 |
SEHER YAGCI
IMO 9556911
|
10,450 | 2009 |
10.4
|
B |
| 650 |
LIDER HALIL
IMO 9462275
|
10,264 | 2020 |
10.4
|
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 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.