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 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.
CII band distribution
1,080 at D/E2,510 rated vessels · 551 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 | 1,671 | 1–3% | €80k–250k | — | vendor claim |
| Propeller redesign / replacement | 1,443 | 5–10% | €400k–1,200k | — | vendor claim |
| Bulbous bow reprofiling | 1,346 | 2–6% | €300k–900k | — | vendor claim |
| Methanol dual-fuel conversion | 952 | 5–15% | €8,000k–20,000k | — | vendor claim |
| LNG dual-fuel conversion | 782 | 15–25% | €15,000k–35,000k | — | vendor claim |
| Shaft generator / PTO | 370 | 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 |
| MSC SABRINA III · <25k | E | 37y | 2026 |
| C LION · 100-200k | 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 |
MARSA VIRGO
IMO 9324954
|
1,118 TEU | 2006 |
20.7
|
E |
| 1852 |
HERCULES J
IMO 9430193
|
1,036 TEU | 2009 |
20.8
|
E |
| 1853 |
TUNADAL
IMO 9429235
|
1,025 TEU | 2012 |
20.9
|
E |
| 1854 |
RUTH
IMO 9376036
|
868 TEU | 2008 |
20.9
|
E |
| 1855 |
MSC AZURIT F
IMO 9403437
|
1,118 TEU | 2008 |
20.9
|
E |
| 1856 |
BALTIC SHEARWATER
IMO 9313228
|
1,638 TEU | 2005 |
21.0
|
E |
| 1857 |
WILHELM
IMO 9376050
|
868 TEU | 2008 |
21.0
|
E |
| 1858 |
WEC CORNEILLE
IMO 9326940
|
862 TEU | 2005 |
21.0
|
E |
| 1859 |
X-PRESS SOUSSE
IMO 9354349
|
868 TEU | 2006 |
21.0
|
E |
| 1860 |
NEUENFELDE
IMO 9231846
|
868 TEU | 2001 |
21.1
|
E |
| 1861 |
EVI
IMO 9396634
|
1,335 TEU | 2008 |
21.1
|
E |
| 1862 |
MEDKON NLS
IMO 9390812
|
228 TEU | 2006 |
21.1
|
E |
| 1863 |
CONESTE
IMO 9252802
|
862 TEU | 2003 |
21.1
|
E |
| 1864 |
ELBTEAM
IMO 9429273
|
880 TEU | 2012 |
21.1
|
E |
| 1865 |
VEGA ALPHA
IMO 9301081
|
917 TEU | 2005 |
21.1
|
E |
| 1866 |
BIANCA RAMBOW
IMO 9297591
|
868 TEU | 2004 |
21.1
|
E |
| 1867 |
ATLANTIC GENEVA
IMO 9330848
|
1,100 TEU | 2007 |
21.2
|
E |
| 1868 |
BG EMERALD
IMO 9803704
|
1,004 TEU | 2018 |
21.2
|
E |
| 1869 |
ASTURIANO III
IMO 9406829
|
1,116 TEU | 2007 |
21.3
|
E |
| 1870 |
SARA BORCHARD
IMO 9354428
|
868 TEU | 2007 |
21.3
|
E |
| 1871 |
MASTERY D
IMO 9301201
|
917 TEU | 2006 |
21.3
|
E |
| 1872 |
PEYTON LYNN C
IMO 9295531
|
869 TEU | 2007 |
21.3
|
E |
| 1873 |
CARLOTA B
IMO 9404065
|
803 TEU | 2007 |
21.3
|
E |
| 1874 |
CONTSHIP VOW
IMO 9395599
|
1,080 TEU | 2007 |
21.4
|
E |
| 1875 |
JSP ROVER
IMO 9323467
|
803 TEU | 2006 |
21.4
|
E |
| 1876 |
QUEEN NM
IMO 9234991
|
868 TEU | 2001 |
21.4
|
E |
| 1877 |
PAVO J
IMO 9355458
|
962 TEU | 2007 |
21.4
|
E |
| 1878 |
IPIOS
IMO 9359117
|
1,118 TEU | 2006 |
21.5
|
E |
| 1879 |
JSP CARLA
IMO 9319868
|
750 TEU | 2004 |
21.5
|
E |
| 1880 |
WEC VAN RIJN
IMO 9315006
|
1,008 TEU | 2005 |
21.5
|
E |
| 1881 |
FALMOUTH
IMO 9266530
|
862 TEU | 2002 |
21.6
|
E |
| 1882 |
ELBFEEDER
IMO 9388522
|
974 TEU | 2008 |
21.6
|
E |
| 1883 |
BG DIAMOND
IMO 9803675
|
1,004 TEU | 2017 |
21.6
|
E |
| 1884 |
MONTE DA GUIA
IMO 9123788
|
636 TEU | 1995 |
21.6
|
E |
| 1885 |
ELBWINTER
IMO 9398773
|
1,036 TEU | 2008 |
21.6
|
E |
| 1886 |
ELBRUNNER
IMO 9395563
|
974 TEU | 2009 |
21.7
|
E |
| 1887 |
JPO GEMINI
IMO 9294020
|
2,478 TEU | 2005 |
21.8
|
E |
| 1888 |
MIRIAM BORCHARD
IMO 9246554
|
868 TEU | 2004 |
21.8
|
E |
| 1889 |
VIVIENNE SHERI D
IMO 9371426
|
925 TEU | 2009 |
21.8
|
E |
| 1890 |
WEC VAN GOGH
IMO 9246566
|
868 TEU | 2004 |
21.9
|
E |
| 1891 |
AMELIE BORCHARD
IMO 9242560
|
868 TEU | 2002 |
21.9
|
E |
| 1892 |
WEC MONDRIAAN
IMO 9354363
|
868 TEU | 2006 |
21.9
|
E |
| 1893 |
AVILA
IMO 9295529
|
887 TEU | 2007 |
21.9
|
E |
| 1894 |
VERA A
IMO 9372585
|
1,000 TEU | 2011 |
21.9
|
E |
| 1895 |
SPICA J
IMO 9355460
|
962 TEU | 2007 |
22.0
|
E |
| 1896 |
MSC SAGITTARIUS F
IMO 9491616
|
957 TEU | 2012 |
22.0
|
E |
| 1897 |
MED IZMIR
IMO 9143879
|
951 TEU | 1998 |
22.0
|
E |
| 1898 |
SC POTOMAC
IMO 9236274
|
1,155 TEU | 2002 |
22.1
|
E |
| 1899 |
AILA
IMO 9354337
|
908 TEU | 2007 |
22.1
|
E |
| 1900 |
KANTATA
IMO 9327580
|
1,118 TEU | 2006 |
22.1
|
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 2024 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.