General Cargo 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
509 at D/E2,735 rated vessels · 271 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 |
|---|---|---|---|---|---|
| Propeller redesign / replacement | 1,462 | 5–10% | €400k–1,200k | — | vendor claim |
| Rotor sails (per unit) | 756 | route-dependent | €1,500k–3,500k | — | vendor claim |
| Suction wing sails (per unit) | 756 | route-dependent | €1,000k–2,500k | — | vendor claim |
| Turbocharger cut-out | 652 | 1–3% | €80k–250k | — | vendor claim |
| Bulbous bow reprofiling | 566 | 2–6% | €300k–900k | — | vendor claim |
| Shaft generator / PTO | 97 | 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 |
|---|---|---|---|
| KOKODA CHIEF · <25k | E | 15y | 2026 |
| CLAUDIO CUCCO · <25k | E | 40y | 2026 |
| GINO CUCCO · <25k | E | 39y | 2026 |
| GIUSEPPE CUCCO · <25k | E | 49y | 2026 |
| LADY OF CHICHESTER · <25k | E | 56y | 2026 |
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1051 |
LADY LAURA
IMO 9321108
|
11,534 | 2006 |
13.6
|
C |
| 1052 |
NORDIC KYLIE
IMO 9357999
|
12,791 | 2005 |
13.6
|
C |
| 1053 |
KENAN ATASOY
IMO 9215658
|
7,116 | 2000 |
13.6
|
C |
| 1055 |
FEED RANA
IMO 9291705
|
4,933 | 2004 |
13.7
|
C |
| 1054 |
BMI EMPEROR
IMO 9310331
|
6,139 | 2005 |
13.7
|
C |
| 1056 |
RAMUS
IMO 9318400
|
6,063 | 2005 |
13.7
|
C |
| 1057 |
DOLFIJNGRACHT
IMO 9420825
|
17,967 | 2009 |
13.7
|
C |
| 1058 |
HAPPY DRAGON
IMO 9551961
|
18,103 | 2011 |
13.7
|
C |
| 1059 |
ONEGO ELBE
IMO 9438573
|
11,087 | 2008 |
13.7
|
C |
| 1061 |
SKY DOLPHIN
IMO 1029039
|
3,802 | 2025 |
13.7
|
C |
| 1060 |
DIAMANTGRACHT
IMO 9420813
|
17,966 | 2009 |
13.7
|
C |
| 1062 |
ANHOLT
IMO 9968205
|
5,217 | 2024 |
13.7
|
C |
| 1065 |
BBC RAINBOW
IMO 9423516
|
18,019 | 2010 |
13.7
|
C |
| 1064 |
EMS LUNA
IMO 1022275
|
4,672 | 2025 |
13.7
|
C |
| 1063 |
NORAN
IMO 9175822
|
8,595 | 1997 |
13.7
|
C |
| 1066 |
FINN II
IMO 9534468
|
10,049 | 2012 |
13.7
|
C |
| 1067 |
HIIUMAA
IMO 9973286
|
5,962 | 2024 |
13.7
|
C |
| 1068 |
NAVIN FALCON
IMO 9492933
|
7,933 | 2008 |
13.8
|
C |
| 1069 |
JUMBO
IMO 8518297
|
3,697 | 1987 |
13.8
|
C |
| 1072 |
ESL AFRICA
IMO 9397171
|
17,356 | 2007 |
13.8
|
C |
| 1071 |
INDUSTRIAL SONG
IMO 9750464
|
12,292 | 2017 |
13.8
|
C |
| 1070 |
FWN STAR
IMO 9721645
|
10,546 | 2015 |
13.8
|
C |
| 1073 |
LADY RUBINA
IMO 9370109
|
13,464 | 2008 |
13.8
|
C |
| 1075 |
DOGGERSBANK
IMO 9341768
|
6,665 | 2006 |
13.8
|
C |
| 1074 |
SUNA
IMO 9080986
|
4,452 | 1994 |
13.8
|
C |
| 1076 |
KATJA
IMO 9454838
|
6,684 | 2009 |
13.8
|
C |
| 1078 |
SLOMAN DISCHARGER
IMO 9463578
|
12,961 | 2011 |
13.8
|
C |
| 1077 |
SCHIPPERSGRACHT
IMO 9197363
|
21,402 | 2000 |
13.8
|
C |
| 1082 |
SINGELGRACHT
IMO 9197375
|
21,311 | 2000 |
13.8
|
C |
| 1081 |
KAREN C
IMO 9523952
|
6,794 | 2010 |
13.8
|
C |
| 1080 |
BALTIC DREAM
IMO 9969522
|
3,718 | 2025 |
13.8
|
C |
| 1079 |
BIRKHOLM
IMO 9968229
|
5,213 | 2024 |
13.8
|
C |
| 1083 |
YANGZE VENUS
IMO 9428401
|
12,094 | 2013 |
13.8
|
C |
| 1084 |
SAXONA
IMO 9371024
|
5,015 | 2006 |
13.8
|
C |
| 1085 |
RESAT AGA
IMO 9545467
|
6,616 | 2009 |
13.8
|
C |
| 1086 |
MY MELODY
IMO 9006382
|
3,713 | 1994 |
13.8
|
C |
| 1089 |
C.ATLAS
IMO 9199141
|
3,683 | 2003 |
13.8
|
C |
| 1088 |
UNISUN
IMO 9448451
|
9,825 | 2009 |
13.8
|
C |
| 1087 |
BBC NAGASAKI
IMO 9559872
|
9,717 | 2011 |
13.8
|
C |
| 1091 |
JSP FALSTER
IMO 9968152
|
5,231 | 2023 |
13.8
|
C |
| 1090 |
SPAARNEGRACHT
IMO 9202558
|
21,402 | 2000 |
13.8
|
C |
| 1093 |
PENHAR
IMO 9534365
|
6,500 | 2010 |
13.9
|
C |
| 1092 |
AMBER TRADER
IMO 9180853
|
6,320 | 1998 |
13.9
|
C |
| 1094 |
JSP SAMSØ
IMO 9968217
|
5,198 | 2024 |
13.9
|
C |
| 1095 |
BILLIE
IMO 9488047
|
12,696 | 2011 |
13.9
|
C |
| 1096 |
TALI
IMO 9173692
|
13,340 | 1998 |
13.9
|
C |
| 1099 |
ONEGO EMS
IMO 9290074
|
10,683 | 2004 |
13.9
|
C |
| 1098 |
TRANSUND
IMO 9213088
|
16,612 | 2002 |
13.9
|
C |
| 1097 |
YI HUI REN HAI
IMO 9628685
|
12,312 | 2013 |
13.9
|
C |
| 1100 |
ANNE
IMO 9433365
|
7,594 | 2010 |
13.9
|
C |
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.