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 |
|---|---|---|---|---|---|
| 1151 |
BHG FORTUNE
IMO 9377846
|
11,185 | 2010 |
14.2
|
C |
| 1152 |
O7 VEGA S
IMO 9484247
|
9,862 | 2011 |
14.2
|
C |
| 1153 |
MAXIMAR
IMO 9951862
|
5,384 | 2024 |
14.2
|
C |
| 1154 |
HUMBERGRACHT
IMO 9433274
|
12,771 | 2009 |
14.2
|
C |
| 1155 |
ANNA
IMO 9631345
|
8,096 | 2013 |
14.2
|
C |
| 1156 |
NIL DEMIR
IMO 8003814
|
4,255 | 1980 |
14.2
|
C |
| 1157 |
BBC NILE
IMO 9571375
|
16,992 | 2011 |
14.2
|
C |
| 1158 |
HAPPY DIAMOND
IMO 9551947
|
18,148 | 2011 |
14.2
|
C |
| 1159 |
ZEYCAN ANA
IMO 9564994
|
8,649 | 2010 |
14.2
|
C |
| 1160 |
BBC REGALIA
IMO 9539389
|
17,907 | 2012 |
14.2
|
C |
| 1161 |
YM FUJI
IMO 9622760
|
10,952 | 2015 |
14.2
|
C |
| 1162 |
PONTICA
IMO 9681974
|
9,005 | 2014 |
14.2
|
C |
| 1163 |
RIX ALLIANCE
IMO 9128403
|
3,004 | 1995 |
14.2
|
C |
| 1164 |
PROUD
IMO 9386433
|
6,500 | 2009 |
14.2
|
C |
| 1165 |
KATE C
IMO 9523964
|
6,794 | 2010 |
14.2
|
C |
| 1166 |
HAV ZANDER
IMO 9001849
|
2,999 | 1990 |
14.2
|
C |
| 1167 |
HELGOLAND
IMO 9973250
|
5,946 | 2024 |
14.2
|
C |
| 1168 |
BORNHOLM
IMO 9968267
|
5,212 | 2024 |
14.2
|
C |
| 1169 |
BBC VIRGINIA
IMO 9501277
|
12,657 | 2010 |
14.2
|
C |
| 1170 |
AEROE
IMO 9968140
|
5,259 | 2023 |
14.2
|
C |
| 1171 |
IOANNIS
IMO 8518340
|
3,697 | 1986 |
14.2
|
C |
| 1172 |
JSP MØN
IMO 9968176
|
5,228 | 2023 |
14.2
|
C |
| 1173 |
AYITA
IMO 9290048
|
10,384 | 2004 |
14.2
|
C |
| 1174 |
VLISTBORG
IMO 9160346
|
9,567 | 1999 |
14.2
|
C |
| 1175 |
BIOMAR
IMO 9956276
|
5,390 | 2025 |
14.2
|
C |
| 1176 |
TANJA
IMO 9534444
|
10,049 | 2011 |
14.3
|
C |
| 1177 |
KARILIN
IMO 9534262
|
6,698 | 2009 |
14.3
|
C |
| 1178 |
AJOS
IMO 9145138
|
3,312 | 1996 |
14.3
|
C |
| 1179 |
LADY DEBORA
IMO 9147875
|
7,580 | 1998 |
14.3
|
C |
| 1180 |
KNARRLAGSUND
IMO 9268849
|
6,734 | 2004 |
14.3
|
C |
| 1181 |
AMADEUS SAFFIER
IMO 9996903
|
3,610 | 2024 |
14.3
|
C |
| 1182 |
FYN
IMO 9968188
|
5,243 | 2023 |
14.3
|
C |
| 1183 |
C. ENDEAVOUR
IMO 9171060
|
3,516 | 1997 |
14.3
|
C |
| 1184 |
ASIM BERK
IMO 9108427
|
3,401 | 1994 |
14.3
|
C |
| 1185 |
BARBARA-B
IMO 9177399
|
5,535 | 1997 |
14.3
|
C |
| 1186 |
VOORNEBORG
IMO 9179373
|
9,567 | 1999 |
14.3
|
C |
| 1187 |
KARSOY
IMO 9555618
|
10,563 | 2009 |
14.3
|
C |
| 1188 |
BBC RAISE
IMO 9538880
|
17,884 | 2011 |
14.3
|
C |
| 1189 |
GUNCE AKAY
IMO 9421051
|
8,678 | 2007 |
14.3
|
C |
| 1190 |
NAFKRATIS
IMO 9235945
|
7,528 | 2000 |
14.3
|
C |
| 1191 |
SOMMEN
IMO 9968138
|
5,248 | 2023 |
14.3
|
C |
| 1192 |
SOFIA
IMO 9957414
|
7,896 | 2024 |
14.3
|
C |
| 1193 |
LOVISA
IMO 9957397
|
7,896 | 2023 |
14.3
|
C |
| 1194 |
ONEGO DUERO
IMO 9580780
|
9,770 | 2012 |
14.3
|
C |
| 1195 |
KLARA
IMO 9507130
|
5,940 | 2010 |
14.3
|
C |
| 1196 |
MINKA C
IMO 9373565
|
5,536 | 2008 |
14.3
|
C |
| 1197 |
SOLITAS-H
IMO 9858670
|
3,850 | 2021 |
14.3
|
C |
| 1198 |
ALINDA
IMO 9969431
|
3,637 | 2024 |
14.4
|
C |
| 1199 |
NURDOGAN
IMO 9001930
|
3,014 | 1990 |
14.4
|
C |
| 1200 |
DAMGRACHT
IMO 9420784
|
18,143 | 2009 |
14.4
|
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.