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
1,081 at D/E2,510 rated vessels · 461 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 | 1,485 | 1–3% | €80k–250k | — | vendor claim |
| Propeller redesign / replacement | 1,440 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,344 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 965 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 795 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Shaft generator / PTO | 360 | 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 |
| SEPELU · <25k | E | 26y | 2026 |
| MSC SABRINA III · <25k | E | 37y | 2026 |
| NILEDUTCH LION · 100-200k | E | 18y | 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 |
|---|---|---|---|---|---|
| 1801 |
AS PENELOPE
IMO 9294537
|
2,572 TEU | 2005 |
14.5
|
E |
| 1802 |
ST. JOHN
IMO 9634646
|
1,700 TEU | 2014 |
14.6
|
E |
| 1803 |
ELBTOWER
IMO 9968918
|
1,400 TEU | 2021 |
14.6
|
E |
| 1804 |
MSC RUTH F
IMO 9212034
|
1,216 TEU | 2000 |
14.6
|
E |
| 1805 |
CMA CGM CAYENNE
IMO 9709192
|
2,100 TEU | 2015 |
14.6
|
E |
| 1806 |
JUDITH BORCHARD
IMO 1016575
|
17,498 | 2024 |
14.7
|
E |
| 1807 |
MEDKON SIA
IMO 9306249
|
1,100 TEU | 2004 |
14.7
|
E |
| 1808 |
MOLIVA
IMO 9454034
|
951 TEU | 2014 |
14.7
|
E |
| 1809 |
DETTIFOSS
IMO 9822853
|
2,150 TEU | 2020 |
14.8
|
E |
| 1810 |
HANSA ROTENBURG
IMO 9401673
|
1,740 TEU | 2009 |
14.8
|
E |
| 1811 |
AURETTE A
IMO 9242285
|
1,170 TEU | 2002 |
14.8
|
E |
| 1812 |
YM INVENTIVE
IMO 9319105
|
1,805 TEU | 2007 |
14.8
|
E |
| 1813 |
AS FREYA
IMO 9292436
|
1,200 TEU | 2004 |
14.8
|
E |
| 1814 |
EAGLE II
IMO 9301122
|
1,300 TEU | 2006 |
14.9
|
E |
| 1815 |
JONNI RITSCHER
IMO 9333383
|
1,856 TEU | 2006 |
15.0
|
E |
| 1816 |
SONDERBORG
IMO 9454242
|
1,085 TEU | 2012 |
15.0
|
E |
| 1817 |
PANDA 003
IMO 9968891
|
1,400 TEU | 2024 |
15.0
|
E |
| 1818 |
SPRING C
IMO 9308027
|
3,500 TEU | 2007 |
15.0
|
E |
| 1819 |
EMOTION
IMO 9359258
|
1,440 TEU | 2008 |
15.2
|
E |
| 1820 |
CMA CGM KOUROU
IMO 9845659
|
2,200 TEU | 2020 |
15.2
|
E |
| 1821 |
DIANE A
IMO 9385532
|
1,604 TEU | 2008 |
15.2
|
E |
| 1822 |
CMA CGM MARSEILLE
IMO 9709207
|
2,100 TEU | 2015 |
15.2
|
E |
| 1823 |
CMA CGM ABIDJAN
IMO 9323481
|
1,740 TEU | 2006 |
15.2
|
E |
| 1824 |
EA BARU
IMO 9295517
|
1,335 TEU | 2005 |
15.2
|
E |
| 1825 |
ARIES J
IMO 9514767
|
786 TEU | 2011 |
15.3
|
E |
| 1826 |
MSC WAVE F
IMO 9232462
|
962 TEU | 2001 |
15.3
|
E |
| 1827 |
XPRESS NETRAVATI
IMO 9348194
|
1,706 TEU | 2006 |
15.3
|
E |
| 1828 |
EF ELDRA
IMO 9470882
|
1,338 TEU | 2010 |
15.3
|
E |
| 1829 |
GFS SAPPHIRE
IMO 9330927
|
1,440 TEU | 2007 |
15.3
|
E |
| 1830 |
MSC IZMIR F
IMO 9127021
|
1,122 TEU | 1996 |
15.3
|
E |
| 1831 |
HELLE RITSCHER
IMO 9333371
|
1,856 TEU | 2006 |
15.3
|
E |
| 1832 |
RAPHAELA
IMO 9365831
|
1,849 TEU | 2008 |
15.4
|
E |
| 1833 |
CMA CGM FORT STE MARIE
IMO 9261906
|
2,260 TEU | 2003 |
15.4
|
E |
| 1834 |
SVENDBORG
IMO 9454230
|
1,085 TEU | 2006 |
15.4
|
E |
| 1835 |
MSC ANZIO II
IMO 9306237
|
1,574 TEU | 2007 |
15.5
|
E |
| 1836 |
EGY CROWN
IMO 9216107
|
1,129 TEU | 2000 |
15.5
|
E |
| 1837 |
MARFRET GUYANE
IMO 9362334
|
1,691 TEU | 2007 |
15.5
|
E |
| 1838 |
MSC ADRIANA II
IMO 9169055
|
1,658 TEU | 1998 |
15.6
|
E |
| 1839 |
MSC ROMINA II
IMO 9449821
|
1,496 TEU | 2009 |
15.6
|
E |
| 1840 |
MEDKON PERLA
IMO 9366457
|
915 TEU | 2007 |
15.6
|
E |
| 1841 |
MSC EMILIE
IMO 9334832
|
1,732 TEU | 2006 |
15.7
|
E |
| 1842 |
BILBAO TRADER
IMO 9306835
|
1,118 TEU | 2006 |
15.7
|
E |
| 1843 |
JONATHAN P
IMO 9357872
|
1,732 TEU | 2006 |
15.8
|
E |
| 1844 |
JAN
IMO 9477335
|
1,350 TEU | 2009 |
15.8
|
E |
| 1845 |
LIMARKO BREEZE
IMO 9516753
|
1,740 TEU | 2011 |
15.9
|
E |
| 1846 |
MSC MIA SUMMER II
IMO 9169067
|
1,658 TEU | 1999 |
15.9
|
E |
| 1847 |
CMA CGM SAINT LAURENT
IMO 9709219
|
2,100 TEU | 2015 |
15.9
|
E |
| 1848 |
CMA CGM SINNAMARY
IMO 9845673
|
2,200 TEU | 2020 |
15.9
|
E |
| 1849 |
MSC CAITLIN II
IMO 9169043
|
1,658 TEU | 1998 |
15.9
|
E |
| 1850 |
ERASMUS MASTER
IMO 9449833
|
1,496 TEU | 2006 |
16.0
|
E |
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.