Most Emission-Efficient Bulk Carriers
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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 2201 |
LEON
IMO 9303871
|
55,730 | 2006 |
5.2
|
D |
| 2202 |
FEDERAL DELTA
IMO 9805271
|
34,492 | 2018 |
5.2
|
D |
| 2203 |
BETTY
IMO 9522881
|
36,892 | 2011 |
5.2
|
D |
| 2204 |
BULK FREEDOM
IMO 9317092
|
52,454 | 2005 |
5.2
|
D |
| 2205 |
BULGARIA
IMO 9968475
|
45,174 | 2024 |
5.2
|
D |
| 2206 |
ASH ATLANTIC
IMO 9470844
|
28,352 | 2008 |
5.2
|
D |
| 2207 |
ASTORIA
IMO 9663635
|
63,353 | 2013 |
5.2
|
D |
| 2208 |
AQUARIUS
IMO 9634438
|
56,048 | 2013 |
5.2
|
D |
| 2209 |
COMMON SPIRIT
IMO 9594717
|
57,078 | 2011 |
5.2
|
D |
| 2210 |
WOOYANG DANDY
IMO 9455648
|
56,819 | 2009 |
5.2
|
D |
| 2211 |
ARNICA
IMO 9514418
|
56,106 | 2010 |
5.2
|
D |
| 2212 |
CHRISTIANNA
IMO 9596703
|
81,755 | 2012 |
5.2
|
D |
| 2213 |
EVA GLOBAL
IMO 9972452
|
40,553 | 2023 |
5.2
|
D |
| 2214 |
YASA CANARY
IMO 9524700
|
55,446 | 2013 |
5.2
|
D |
| 2215 |
FRIEDRICH SCHULTE
IMO 9841940
|
39,851 | 2015 |
5.2
|
D |
| 2216 |
RICARDA
IMO 9693329
|
39,949 | 2015 |
5.2
|
D |
| 2217 |
MENELAOS
IMO 9696436
|
63,458 | 2015 |
5.2
|
D |
| 2218 |
EAGLE TRADER
IMO 9648855
|
57,981 | 2013 |
5.2
|
D |
| 2219 |
KING WIN
IMO 9590230
|
56,809 | 2012 |
5.2
|
D |
| 2220 |
VIVA COSMOS
IMO 9251327
|
52,089 | 2003 |
5.2
|
D |
| 2221 |
NAPHA NAREE
IMO 9703423
|
38,737 | 2015 |
5.2
|
D |
| 2222 |
NORDTAJO
IMO 9741865
|
39,890 | 2017 |
5.2
|
D |
| 2223 |
THOR INDEPENDENCE
IMO 9222510
|
52,407 | 2001 |
5.2
|
D |
| 2224 |
YASAR KEMAL
IMO 9230191
|
52,827 | 2001 |
5.2
|
D |
| 2225 |
INDIGO FLORA
IMO 9584877
|
58,724 | 2013 |
5.2
|
D |
| 2226 |
CHANG HANG HAN HAI
IMO 9628752
|
58,022 | 2012 |
5.2
|
D |
| 2227 |
NORD TOPAZ
IMO 9992268
|
39,988 | 2024 |
5.2
|
D |
| 2228 |
HAMBURG CITY
IMO 9863170
|
39,513 | 2020 |
5.2
|
D |
| 2229 |
SSI DEFIANT
IMO 9603116
|
56,489 | 2013 |
5.2
|
D |
| 2230 |
PAN OPTIMUM
IMO 9890915
|
37,704 | 2020 |
5.2
|
D |
| 2231 |
IVS WENTWORTH
IMO 9725550
|
58,091 | 2015 |
5.2
|
D |
| 2232 |
OCEAN KNIGHT
IMO 9453248
|
56,808 | 2011 |
5.2
|
D |
| 2233 |
TELERIG
IMO 9452854
|
56,867 | 2011 |
5.2
|
D |
| 2234 |
SAVITA NAREE
IMO 9726437
|
62,971 | 2016 |
5.2
|
D |
| 2235 |
LOWLANDS OPAL
IMO 9317559
|
55,381 | 2007 |
5.2
|
D |
| 2236 |
UNITY HARMONY
IMO 9791054
|
37,140 | 2020 |
5.2
|
D |
| 2237 |
JAMES BAY
IMO 9610676
|
37,633 | 2013 |
5.2
|
D |
| 2238 |
MISTRAL I
IMO 9650860
|
81,813 | 2013 |
5.2
|
D |
| 2239 |
FEDERAL YUKON
IMO 9205897
|
36,563 | 2000 |
5.2
|
D |
| 2240 |
ASTRO PROPUS
IMO 9691498
|
38,271 | 2014 |
5.2
|
D |
| 2241 |
PLATON
IMO 9452555
|
58,501 | 2011 |
5.2
|
D |
| 2242 |
IMOGEN
IMO 9884370
|
37,702 | 2020 |
5.2
|
D |
| 2243 |
EVA BRIGHT
IMO 9972438
|
40,577 | 2023 |
5.2
|
D |
| 2244 |
UNION EXPLORER
IMO 9449259
|
57,700 | 2011 |
5.2
|
D |
| 2245 |
NORSE CAMDEN
IMO 9926996
|
40,020 | 2022 |
5.2
|
D |
| 2246 |
RUBINA
IMO 9725512
|
39,959 | 2018 |
5.2
|
D |
| 2247 |
ALKYONI
IMO 9624055
|
55,830 | 2012 |
5.2
|
D |
| 2248 |
NORDSUN
IMO 9705158
|
61,559 | 2015 |
5.2
|
D |
| 2249 |
SIENA
IMO 9251080
|
32,744 | 2002 |
5.2
|
D |
| 2250 |
GULLUK
IMO 9228100
|
50,992 | 2002 |
5.2
|
D |
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.