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
1,079 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 | 1,640 | 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 |
|---|---|---|---|---|---|
| 1901 |
NCL SALTEN
IMO 9252773
|
862 TEU | 2002 |
22.1
|
E |
| 1902 |
NAAMA BORCHARD
IMO 9242558
|
868 TEU | 2002 |
22.1
|
E |
| 1903 |
CONTAINERSHIPS VIII
IMO 9336244
|
850 TEU | 2006 |
22.1
|
E |
| 1904 |
VOHBURG
IMO 9287807
|
812 TEU | 2005 |
22.1
|
E |
| 1905 |
MED URLA
IMO 9160920
|
847 TEU | 1997 |
22.1
|
E |
| 1906 |
CONTAINERSHIPS VI
IMO 9188518
|
966 TEU | 1999 |
22.2
|
E |
| 1907 |
CT DANIEL
IMO 9326988
|
862 TEU | 2006 |
22.2
|
E |
| 1908 |
CMA CGM DAKHLA
IMO 9461594
|
1,036 TEU | 2008 |
22.2
|
E |
| 1909 |
LUCIA B
IMO 9404077
|
803 TEU | 2007 |
22.2
|
E |
| 1910 |
JSP RIDER
IMO 9322566
|
803 TEU | 2006 |
22.2
|
E |
| 1911 |
MONTE BRASIL
IMO 9083055
|
636 TEU | 1994 |
22.3
|
E |
| 1912 |
BJORG
IMO 9231834
|
868 TEU | 2001 |
22.3
|
E |
| 1913 |
EINSTEIN
IMO 9483346
|
1,000 TEU | 2012 |
22.4
|
E |
| 1914 |
ATLANTIC MONACO
IMO 9356658
|
1,000 TEU | 2008 |
22.4
|
E |
| 1915 |
HELMUT
IMO 9354466
|
868 TEU | 2006 |
22.4
|
E |
| 1916 |
MARTINE A
IMO 9020340
|
1,139 TEU | 1993 |
22.5
|
E |
| 1917 |
JSP ANNA
IMO 9354454
|
868 TEU | 2006 |
22.5
|
E |
| 1918 |
PERSEUS
IMO 9129469
|
646 TEU | 1996 |
22.5
|
E |
| 1919 |
ADILIA I
IMO 9318761
|
956 TEU | 2005 |
22.5
|
E |
| 1920 |
CONTSHIP ONO
IMO 9324978
|
1,080 TEU | 2007 |
22.5
|
E |
| 1921 |
BF TROUT
IMO 9437232
|
990 TEU | 2008 |
22.5
|
E |
| 1922 |
ANDREA
IMO 9333357
|
868 TEU | 2005 |
22.6
|
E |
| 1923 |
RUMBA
IMO 9264714
|
660 TEU | 2003 |
22.6
|
E |
| 1924 |
MSC LEVANTE F
IMO 9330264
|
1,114 TEU | 2006 |
22.6
|
E |
| 1925 |
MSC AMANDA F
IMO 9319600
|
916 TEU | 2006 |
22.6
|
E |
| 1926 |
ATLANTIC GREEN
IMO 9354404
|
868 TEU | 2006 |
22.7
|
E |
| 1927 |
AURORA
IMO 9234989
|
868 TEU | 2001 |
22.7
|
E |
| 1928 |
PIRITA
IMO 9108063
|
660 TEU | 1995 |
22.8
|
E |
| 1929 |
TROUPER
IMO 9326952
|
868 TEU | 2005 |
22.8
|
E |
| 1930 |
CT PACHUCA
IMO 9344253
|
750 TEU | 2005 |
22.8
|
E |
| 1931 |
MEDKON PEP
IMO 9319595
|
957 TEU | 2006 |
22.8
|
E |
| 1932 |
MEL SPIRIT
IMO 9237369
|
868 TEU | 2001 |
22.8
|
E |
| 1933 |
CONTSHIP PAX
IMO 9435521
|
1,118 TEU | 2008 |
22.9
|
E |
| 1934 |
ATLANTIS A
IMO 9354375
|
868 TEU | 2007 |
22.9
|
E |
| 1935 |
CONTSHIP GEM
IMO 9491599
|
957 TEU | 2010 |
22.9
|
E |
| 1936 |
SANTUCA B
IMO 9287687
|
822 TEU | 2003 |
23.0
|
E |
| 1937 |
HENRIKE SCHEPERS
IMO 9404091
|
793 TEU | 2008 |
23.0
|
E |
| 1938 |
CONTSHIP OAK
IMO 9373917
|
1,118 TEU | 2007 |
23.0
|
E |
| 1939 |
BG IRELAND
IMO 9355446
|
962 TEU | 2007 |
23.0
|
E |
| 1940 |
NCL MAKRELL
IMO 9347774
|
957 TEU | 2006 |
23.0
|
E |
| 1941 |
MSC SAGITTARIUS F
IMO 9491616
|
957 TEU | 2012 |
23.0
|
E |
| 1942 |
JSP MISTRAL
IMO 9368041
|
907 TEU | 2010 |
23.0
|
E |
| 1943 |
FAITH
IMO 9301108
|
900 TEU | 2006 |
23.1
|
E |
| 1944 |
NANTO
IMO 9083043
|
749 TEU | 1994 |
23.1
|
E |
| 1945 |
CT ROTTERDAM
IMO 9395575
|
974 TEU | 2009 |
23.1
|
E |
| 1946 |
ARNARFELL
IMO 9306005
|
909 TEU | 2005 |
23.1
|
E |
| 1947 |
DINA TRADER
IMO 9354442
|
868 TEU | 2007 |
23.1
|
E |
| 1948 |
LAGARFOSS
IMO 9641314
|
875 TEU | 2014 |
23.1
|
E |
| 1949 |
EDITH
IMO 9328625
|
750 TEU | 2005 |
23.2
|
E |
| 1950 |
RIJNBORG
IMO 9355812
|
1,700 TEU | 2007 |
23.2
|
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.