Container Ship 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
1,079 at D/E2,510 rated vessels · 443 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 |
|---|---|---|---|---|---|
| Turbocharger cut-out | 1,640 | 1–3% | €80k–250k | — | vendor claim |
| Propeller redesign / replacement | 1,427 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,330 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 933 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 763 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Shaft generator / PTO | 348 | 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 |
|---|---|---|---|
| HANSA AFRICA · 25-60k | E | 16y | 2026 |
| MSC ANNAMARIA · <25k | E | 1y | 2026 |
| SEPELU · <25k | E | 26y | 2026 |
| C LION · 100-200k | E | 21y | 2026 |
| HAMBURG TRADER · <25k | E | 21y | 2026 |
Note: Container/ro-ro cargo ship vessels are excluded from this ranking — their CII type is a per-vessel flag-state determination, so no valid comparison metric exists for them.
| # | Vessel | Size (TEU) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1551 |
VIVIEN A
IMO 9491848
|
2,478 TEU | 2007 |
11.2
|
D |
| 1552 |
CHIQUITA TRADER
IMO 9304760
|
2,490 TEU | 2005 |
11.2
|
D |
| 1553 |
CMA CGM AMERICA
IMO 9295971
|
4,043 TEU | 2006 |
11.2
|
D |
| 1554 |
MSC TASMAN VI
IMO 9189342
|
5,248 TEU | 2000 |
11.2
|
D |
| 1555 |
MSC AGATA III
IMO 9304734
|
2,490 TEU | 2004 |
11.3
|
D |
| 1556 |
CMA CGM SHAKESPEARE
IMO 9780653
|
1,924 TEU | 2017 |
11.3
|
D |
| 1557 |
HSL NIKE
IMO 9301457
|
2,556 TEU | 2005 |
11.3
|
D |
| 1558 |
CMA CGM AFRICA THREE
IMO 9451939
|
3,718 TEU | 2010 |
11.3
|
D |
| 1559 |
DUBLIN EXPRESS
IMO 9232577
|
4,115 TEU | 2002 |
11.3
|
D |
| 1560 |
MIMMI SCHULTE
IMO 9743473
|
2,340 TEU | 2017 |
11.4
|
D |
| 1561 |
CMA CGM SAIGON
IMO 9357547
|
1,713 TEU | 2008 |
11.4
|
D |
| 1562 |
CMA CGM PREGOLIA
IMO 9745500
|
2,487 TEU | 2018 |
11.4
|
D |
| 1563 |
MAERSK VENEZIA
IMO 9344681
|
1,819 TEU | 2007 |
11.4
|
D |
| 1564 |
MSC REET II
IMO 9236224
|
1,740 TEU | 2002 |
11.4
|
D |
| 1565 |
MONTREAL EXPRESS
IMO 9253741
|
4,402 TEU | 2003 |
11.4
|
D |
| 1566 |
ROZA A
IMO 9126742
|
1,119 TEU | 1996 |
11.4
|
D |
| 1567 |
MSC AQUARIUS VII
IMO 9262704
|
6,492 TEU | 2003 |
11.4
|
D |
| 1568 |
HYUNDAI TOKYO
IMO 9305673
|
6,800 TEU | 2006 |
11.4
|
D |
| 1569 |
MSC MELANI III
IMO 9399741
|
2,797 TEU | 2007 |
11.4
|
D |
| 1570 |
SC HOUSTON
IMO 9445904
|
2,758 TEU | 2010 |
11.4
|
D |
| 1571 |
CONTAINERSHIPS BOREALIS
IMO 9866249
|
1,380 TEU | 2015 |
11.4
|
D |
| 1572 |
MAIRA
IMO 9203502
|
2,506 TEU | 2000 |
11.5
|
D |
| 1573 |
CONSTANTINOS P II
IMO 9461623
|
4,249 TEU | 2011 |
11.5
|
D |
| 1574 |
HILDE A
IMO 9305908
|
1,529 TEU | 2005 |
11.5
|
D |
| 1575 |
GSL ALICE
IMO 9509164
|
3,400 TEU | 2014 |
11.5
|
D |
| 1576 |
CMA CGM BLUE
IMO 9756107
|
2,257 TEU | 2017 |
11.5
|
D |
| 1577 |
ITAL WIT
IMO 9950791
|
2,300 TEU | 2021 |
11.5
|
D |
| 1578 |
MSC ANTWERP III
IMO 9304746
|
2,490 TEU | 2005 |
11.5
|
D |
| 1579 |
EGY SKY
IMO 9366483
|
1,147 TEU | 2007 |
11.6
|
D |
| 1580 |
MAERSK NEW DELHI
IMO 9402627
|
2,500 TEU | 2009 |
11.6
|
D |
| 1581 |
LUTETIA
IMO 9246695
|
3,091 TEU | 2005 |
11.6
|
D |
| 1582 |
MSC VANQUISH II
IMO 9242625
|
1,768 TEU | 2001 |
11.6
|
D |
| 1583 |
SEASPAN MONTEVIDEO
IMO 9385984
|
2,500 TEU | 2008 |
11.6
|
D |
| 1584 |
EM CORFU
IMO 9231494
|
2,556 TEU | 2001 |
11.6
|
D |
| 1585 |
NYSTED MAERSK
IMO 9220897
|
2,226 TEU | 2001 |
11.6
|
D |
| 1586 |
AS SARA
IMO 9410272
|
1,713 TEU | 2010 |
11.6
|
D |
| 1587 |
IRENES REMEDY
IMO 9315850
|
1,368 TEU | 2005 |
11.6
|
D |
| 1588 |
CMA CGM SAMBHAR
IMO 9295969
|
4,043 TEU | 2006 |
11.6
|
D |
| 1589 |
CASABLANCA A
IMO 9330903
|
1,440 TEU | 2006 |
11.6
|
D |
| 1590 |
MSC ISHYKA
IMO 9154206
|
2,432 TEU | 1997 |
11.6
|
D |
| 1591 |
NORA MAERSK
IMO 9192478
|
2,240 TEU | 2000 |
11.7
|
D |
| 1592 |
TEOMAN A
IMO 9226504
|
2,452 TEU | 2001 |
11.7
|
D |
| 1593 |
MARTHA A
IMO 9299484
|
2,474 TEU | 2003 |
11.7
|
D |
| 1594 |
GREEN OCEAN
IMO 9865960
|
1,800 TEU | 2019 |
11.7
|
D |
| 1595 |
EVRIDIKI G
IMO 9231482
|
2,556 TEU | 2001 |
11.7
|
D |
| 1596 |
X-PRESS SAGARMALA
IMO 9862736
|
1,800 TEU | 2021 |
11.7
|
D |
| 1597 |
GREEN POLE
IMO 9866005
|
1,800 TEU | 2020 |
11.7
|
D |
| 1598 |
HAIAN ZETA
IMO 9354648
|
1,698 TEU | 2010 |
11.7
|
D |
| 1599 |
CMA CGM FUZHOU
IMO 9596313
|
1,740 TEU | 2014 |
11.7
|
D |
| 1600 |
MARGUERITE A
IMO 9305893
|
1,529 TEU | 2003 |
11.7
|
D |
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.