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
516 at D/E2,735 rated vessels · 242 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 | 1,466 | 5–10% | €400k–1,200k | — | vendor claim |
| Rotor sails (per unit) | 631 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 631 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Bulbous bow reprofiling | 572 | 2–6% | €300k–900k | — | vendor claim |
| Turbocharger cut-out | 530 | 1–3% | €80k–250k | — | vendor claim |
| Shaft generator / PTO | 101 | 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 |
|---|---|---|---|
| PACIFIC INTEGRITY · <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 |
|---|---|---|---|---|---|
| 552 |
CHIPOLBROK GALAXY
IMO 9432141
|
30,330 | 2010 |
9.2
|
B |
| 551 |
ATLANTA
IMO 9513373
|
12,223 | 2009 |
9.2
|
B |
| 553 |
LEOPOLD STAFF
IMO 9272228
|
30,469 | 2004 |
9.2
|
B |
| 554 |
BEATRIX
IMO 9419280
|
14,603 | 2009 |
9.2
|
B |
| 555 |
XIA MEN ZE SHUN
IMO 9695107
|
27,263 | 2014 |
9.2
|
B |
| 556 |
ASH ADRIATIC
IMO 9614830
|
11,396 | 2012 |
9.3
|
B |
| 557 |
MATTEO BR
IMO 9556844
|
25,000 | 2010 |
9.3
|
B |
| 558 |
LAKE ST. CLAIR
IMO 9315549
|
27,740 | 2005 |
9.3
|
B |
| 559 |
MAXIMUS-1
IMO 9344734
|
10,632 | 2004 |
9.3
|
B |
| 560 |
VERTOM CYTA
IMO 9938731
|
7,281 | 2023 |
9.3
|
B |
| 561 |
ADAVEGA
IMO 9539339
|
12,427 | 2010 |
9.3
|
B |
| 563 |
AAL PUSAN
IMO 9498389
|
32,279 | 2012 |
9.3
|
B |
| 562 |
EGBERT WAGENBORG
IMO 9802695
|
14,367 | 2017 |
9.3
|
B |
| 564 |
FISHER
IMO 9177791
|
12,974 | 1999 |
9.3
|
B |
| 565 |
MARIA FRANCISCA
IMO 9235361
|
30,320 | 2004 |
9.3
|
B |
| 566 |
ARKLOW WIND
IMO 9818943
|
16,861 | 2019 |
9.4
|
B |
| 567 |
VERTOM ANETTE
IMO 9972763
|
7,292 | 2024 |
9.4
|
B |
| 569 |
SIENNA
IMO 9353022
|
8,163 | 2005 |
9.4
|
B |
| 568 |
ARKLOW WOOD
IMO 9818967
|
16,861 | 2020 |
9.4
|
B |
| 570 |
ORUBA
IMO 9430624
|
10,611 | 2007 |
9.4
|
B |
| 571 |
ADAROSE
IMO 9392107
|
12,497 | 2009 |
9.4
|
B |
| 572 |
MARIA JOSE
IMO 9593672
|
24,964 | 2011 |
9.5
|
B |
| 573 |
MISJE ROSE
IMO 9967548
|
5,310 | 2024 |
9.5
|
B |
| 575 |
ULTRA KUROSHIO
IMO 1057543
|
13,796 | 2025 |
9.5
|
B |
| 574 |
VERTOM LISA
IMO 9972775
|
7,280 | 2024 |
9.5
|
B |
| 576 |
MUHARREM DADAYLI
IMO 9558581
|
13,449 | 2010 |
9.5
|
B |
| 577 |
BLUE CAPRAMAR
IMO 9641845
|
7,800 | 2012 |
9.5
|
B |
| 578 |
PEACE
IMO 9553983
|
16,817 | 2012 |
9.5
|
B |
| 579 |
LAKE ONTARIO
IMO 9283538
|
27,783 | 2004 |
9.6
|
B |
| 580 |
SIRUS SKY
IMO 9648738
|
7,800 | 2012 |
9.6
|
B |
| 581 |
ZI JING SONG
IMO 9608910
|
27,402 | 2012 |
9.6
|
B |
| 582 |
WO LONG SONG
IMO 9416783
|
27,354 | 2010 |
9.6
|
B |
| 583 |
SANDSTAD
IMO 1028956
|
8,583 | 2025 |
9.6
|
B |
| 584 |
JADE I
IMO 9162411
|
25,012 | 1998 |
9.6
|
B |
| 585 |
WESER STAHL
IMO 9186687
|
47,257 | 1999 |
9.6
|
B |
| 586 |
LADY AYSE
IMO 9227871
|
16,239 | 2001 |
9.7
|
B |
| 587 |
FINNBORG
IMO 9419321
|
14,603 | 2011 |
9.7
|
B |
| 588 |
MOHAMAD Y
IMO 8107000
|
11,990 | 1982 |
9.7
|
B |
| 589 |
PATAGONMAN
IMO 9521851
|
18,858 | 2012 |
9.7
|
B |
| 590 |
ICDAS-5
IMO 9829916
|
15,621 | 2019 |
9.7
|
B |
| 591 |
MIKAWA
IMO 9354208
|
14,078 | 2006 |
9.8
|
B |
| 593 |
ARKLOW WILLOW
IMO 9818955
|
16,861 | 2019 |
9.8
|
B |
| 592 |
LADY ESMA
IMO 9402110
|
31,612 | 2009 |
9.8
|
B |
| 594 |
TRINITYBORG
IMO 9546485
|
21,277 | 2013 |
9.8
|
B |
| 595 |
ARAGONBORG
IMO 9466312
|
17,294 | 2010 |
9.8
|
B |
| 598 |
TIMBERLAND
IMO 9204790
|
20,406 | 2000 |
9.8
|
B |
| 597 |
BRAVE WARRIOR
IMO 7208728
|
6,336 | 1972 |
9.8
|
B |
| 596 |
VERTOM TOMMA
IMO 9938743
|
7,281 | 2023 |
9.8
|
B |
| 599 |
LAKE ERIE
IMO 9283540
|
27,781 | 2004 |
9.8
|
B |
| 600 |
KING JOY
IMO 9537472
|
16,808 | 2009 |
9.8
|
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 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.