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 |
|---|---|---|---|---|---|
| 1951 |
KILIA
IMO 9412517
|
1,025 TEU | 2010 |
19.3
|
E |
| 1952 |
VERA A
IMO 9372585
|
1,000 TEU | 2011 |
19.3
|
E |
| 1953 |
CMA CGM WEST
IMO 9396610
|
1,345 TEU | 2008 |
19.4
|
E |
| 1954 |
AKHISAR
IMO 9237149
|
600 TEU | 2000 |
19.4
|
E |
| 1955 |
MEDKON ANA
IMO 9308596
|
974 TEU | 2005 |
19.4
|
E |
| 1956 |
CONTSHIP TOP
IMO 9395616
|
1,080 TEU | 2008 |
19.4
|
E |
| 1957 |
ATLANTIC GENEVA
IMO 9330848
|
1,100 TEU | 2007 |
19.4
|
E |
| 1958 |
KATHARINA
IMO 9584865
|
1,036 TEU | 2012 |
19.6
|
E |
| 1959 |
MSC VERA F
IMO 9235610
|
1,102 TEU | 2003 |
19.6
|
E |
| 1960 |
CONTSHIP ACE
IMO 9348637
|
1,267 TEU | 2008 |
19.7
|
E |
| 1961 |
SC MEMPHIS
IMO 9324174
|
1,200 TEU | 2005 |
19.7
|
E |
| 1962 |
WEC VAN RUYSDAEL
IMO 9287792
|
812 TEU | 2004 |
19.8
|
E |
| 1963 |
VERA RAMBOW
IMO 9432220
|
1,421 TEU | 2008 |
19.8
|
E |
| 1964 |
KINGSTON TRADER
IMO 9162679
|
864 TEU | 1997 |
19.8
|
E |
| 1965 |
WEC FRANS HALS
IMO 9326964
|
862 TEU | 2005 |
19.8
|
E |
| 1966 |
MEDKON GEMLIK
IMO 9103350
|
650 TEU | 1996 |
19.8
|
E |
| 1967 |
HELENA
IMO 9584487
|
1,036 TEU | 2012 |
19.8
|
E |
| 1968 |
MARBURG
IMO 9387592
|
1,025 TEU | 2009 |
19.9
|
E |
| 1969 |
SAMSKIP TOUBKAL
IMO 9584475
|
1,036 TEU | 2012 |
20.0
|
E |
| 1970 |
BG SAPPHIRE
IMO 9803699
|
1,004 TEU | 2018 |
20.0
|
E |
| 1971 |
ATLANTIC MONACO
IMO 9356658
|
1,000 TEU | 2008 |
20.0
|
E |
| 1972 |
BG DIAMOND
IMO 9803675
|
1,004 TEU | 2017 |
20.0
|
E |
| 1973 |
EVER PRIDE
IMO 9249233
|
1,206 TEU | 2003 |
20.0
|
E |
| 1974 |
WEC VAN GOGH
IMO 9246566
|
868 TEU | 2004 |
20.1
|
E |
| 1975 |
ADMIRAL NEPTUNE
IMO 9354387
|
868 TEU | 2007 |
20.1
|
E |
| 1976 |
SSF LILY
IMO 9318266
|
1,155 TEU | 2004 |
20.1
|
E |
| 1977 |
MEL SPIRIT
IMO 9237369
|
868 TEU | 2001 |
20.1
|
E |
| 1978 |
NORDICA
IMO 9483695
|
1,036 TEU | 2011 |
20.1
|
E |
| 1979 |
MARTI WIND
IMO 9386976
|
1,402 TEU | 2008 |
20.1
|
E |
| 1980 |
NEUENFELDE
IMO 9231846
|
868 TEU | 2001 |
20.2
|
E |
| 1981 |
MORAGA
IMO 9220067
|
1,197 TEU | 2001 |
20.2
|
E |
| 1982 |
NAAMA BORCHARD
IMO 9242558
|
868 TEU | 2002 |
20.2
|
E |
| 1983 |
MED CORLU
IMO 9106479
|
1,055 TEU | 1995 |
20.2
|
E |
| 1984 |
ATLANTIC GREEN
IMO 9354404
|
868 TEU | 2006 |
20.2
|
E |
| 1985 |
ELBWIND
IMO 9483334
|
1,036 TEU | 2012 |
20.3
|
E |
| 1986 |
BIANCA RAMBOW
IMO 9297591
|
868 TEU | 2004 |
20.3
|
E |
| 1987 |
HERCULES J
IMO 9430193
|
1,036 TEU | 2009 |
20.4
|
E |
| 1988 |
AILA
IMO 9354337
|
908 TEU | 2007 |
20.4
|
E |
| 1989 |
ELBTEAM
IMO 9429273
|
880 TEU | 2012 |
20.4
|
E |
| 1990 |
ALDEBARAN J
IMO 9349186
|
962 TEU | 2006 |
20.4
|
E |
| 1991 |
ATLANTIC MERCHANT
IMO 9378929
|
1,118 TEU | 2008 |
20.4
|
E |
| 1992 |
X-PRESS SOUSSE
IMO 9354349
|
868 TEU | 2006 |
20.4
|
E |
| 1993 |
TITAN
IMO 9126998
|
1,122 TEU | 1996 |
20.4
|
E |
| 1994 |
CONTAINERSHIPS VIII
IMO 9336244
|
850 TEU | 2006 |
20.4
|
E |
| 1995 |
MEDKON SAMSUN
IMO 9305934
|
700 TEU | 2004 |
20.4
|
E |
| 1996 |
ELBTRADER
IMO 9388534
|
974 TEU | 2008 |
20.5
|
E |
| 1997 |
LEYLA KALKAVAN
IMO 9126924
|
1,145 TEU | 1997 |
20.5
|
E |
| 1998 |
MEDKON NLS
IMO 9390812
|
228 TEU | 2006 |
20.5
|
E |
| 1999 |
ELBIA
IMO 9326990
|
868 TEU | 2006 |
20.6
|
E |
| 2000 |
NORDIC ITALIA
IMO 9474395
|
1,085 TEU | 2012 |
20.6
|
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.