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 |
|---|---|---|---|---|---|
| 1851 |
MANDO
IMO 9175705
|
1,174 TEU | 1999 |
16.0
|
E |
| 1852 |
MSC GAETA II
IMO 9306213
|
1,574 TEU | 2007 |
16.0
|
E |
| 1853 |
MATILDE A
IMO 9292448
|
1,200 TEU | 2003 |
16.0
|
E |
| 1854 |
ANNALISA P
IMO 9437141
|
1,284 TEU | 2008 |
16.1
|
E |
| 1855 |
ELBSPRING
IMO 9462794
|
1,425 TEU | 2009 |
16.1
|
E |
| 1856 |
BALTIC SHARK
IMO 9315032
|
868 TEU | 2004 |
16.1
|
E |
| 1857 |
MSC HOGGAR
IMO 9286449
|
858 TEU | 2004 |
16.1
|
E |
| 1858 |
CHATTANOOGA
IMO 9611034
|
1,036 TEU | 2012 |
16.1
|
E |
| 1859 |
CONTSHIP BOX
IMO 9449845
|
1,496 TEU | 2009 |
16.2
|
E |
| 1860 |
SC MARIGOT
IMO 9275115
|
1,200 TEU | 2005 |
16.2
|
E |
| 1861 |
EF EMIRA
IMO 9357810
|
1,706 TEU | 2008 |
16.2
|
E |
| 1862 |
BG GREEN
IMO 9964613
|
1,400 TEU | 2021 |
16.2
|
E |
| 1863 |
MSC CEDAR II
IMO 9231092
|
1,680 TEU | 2001 |
16.3
|
E |
| 1864 |
MARIELYST
IMO 9448669
|
1,085 TEU | 2010 |
16.3
|
E |
| 1865 |
MSC STRAIT II
IMO 9351218
|
1,713 TEU | 2008 |
16.4
|
E |
| 1866 |
MSC ELKE F
IMO 9318773
|
830 TEU | 2005 |
16.4
|
E |
| 1867 |
THETIS D
IMO 9372274
|
1,425 TEU | 2009 |
16.5
|
E |
| 1868 |
MICHIGAN
IMO 9437139
|
1,284 TEU | 2008 |
16.5
|
E |
| 1869 |
MSC ALBA F
IMO 9499010
|
1,022 TEU | 2008 |
16.6
|
E |
| 1870 |
ONUR G.A
IMO 9238076
|
1,208 TEU | 2001 |
16.6
|
E |
| 1871 |
KARLA A
IMO 9297577
|
1,676 TEU | 2003 |
16.6
|
E |
| 1872 |
MSC ERMINIA III
IMO 9246346
|
2,490 TEU | 2003 |
16.7
|
E |
| 1873 |
MED TEKIRDAG
IMO 9265598
|
1,100 TEU | 2003 |
16.8
|
E |
| 1874 |
ALANA
IMO 9297589
|
862 TEU | 2004 |
16.8
|
E |
| 1875 |
DANIEL A
IMO 9238064
|
1,208 TEU | 2001 |
16.8
|
E |
| 1876 |
ANINA
IMO 9354351
|
1,008 TEU | 2006 |
16.9
|
E |
| 1877 |
ATLANTIC NORTH
IMO 9236597
|
1,129 TEU | 2002 |
16.9
|
E |
| 1878 |
NORDIC PORTO
IMO 9448671
|
1,085 TEU | 2011 |
17.0
|
E |
| 1879 |
MEDKON MIRA
IMO 9152911
|
1,150 TEU | 1998 |
17.0
|
E |
| 1880 |
ELBSUMMER
IMO 9386718
|
1,425 TEU | 2009 |
17.0
|
E |
| 1881 |
BURAK BAYRAKTAR
IMO 9260536
|
858 TEU | 2002 |
17.0
|
E |
| 1882 |
MSC MARYLENA II
IMO 9169031
|
1,658 TEU | 1998 |
17.1
|
E |
| 1883 |
VICTORIA L
IMO 9430155
|
1,300 TEU | 2009 |
17.1
|
E |
| 1884 |
CMA CGM KAILAS
IMO 9339545
|
1,860 TEU | 2006 |
17.1
|
E |
| 1885 |
BG RED
IMO 9976965
|
1,400 TEU | 2024 |
17.2
|
E |
| 1886 |
HEINRICH EHLER
IMO 9372200
|
1,425 TEU | 2008 |
17.2
|
E |
| 1887 |
CMA CGM BLOSSOM
IMO 9962524
|
1,096 TEU | 2023 |
17.3
|
E |
| 1888 |
MSC RACHEL F
IMO 9212010
|
1,216 TEU | 2000 |
17.3
|
E |
| 1889 |
BG ORANGE
IMO 9964637
|
1,400 TEU | 2024 |
17.4
|
E |
| 1890 |
CMA CGM NOUADHIBOU
IMO 9376892
|
1,350 TEU | 2007 |
17.4
|
E |
| 1891 |
RMS ROSE
IMO 9318761
|
830 TEU | 2005 |
17.5
|
E |
| 1892 |
SKYVIEW
IMO 9358890
|
1,300 TEU | 2007 |
17.6
|
E |
| 1893 |
CMA CGM GULF EXPRESS
IMO 9239874
|
1,679 TEU | 2002 |
17.6
|
E |
| 1894 |
MERITO
IMO 9167942
|
1,104 TEU | 1998 |
17.6
|
E |
| 1895 |
EXPERT
IMO 9412529
|
880 TEU | 2010 |
17.6
|
E |
| 1896 |
MEDKON ANKA
IMO 9366469
|
1,147 TEU | 2007 |
17.7
|
E |
| 1897 |
WEC MONDRIAAN
IMO 9354363
|
868 TEU | 2006 |
17.7
|
E |
| 1898 |
ELBSTROM
IMO 9369007
|
974 TEU | 2008 |
17.7
|
E |
| 1899 |
FIONA
IMO 9149885
|
1,698 TEU | 1998 |
17.8
|
E |
| 1900 |
BFR
IMO 9103386
|
652 TEU | 1995 |
17.8
|
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.