Most Emission-Efficient General Cargos
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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1 |
GREEN OSAKA
IMO 1027380
|
73,641 | 2025 |
3.1
|
A |
| 2 |
SDM BEIHAI
IMO 9949285
|
70,876 | 2024 |
3.2
|
A |
| 3 |
BETULA ARROW
IMO 9720055
|
61,007 | 2014 |
3.3
|
A |
| 4 |
WAN FU
IMO 1072842
|
61,225 | 2025 |
3.3
|
A |
| 5 |
PACIFIC PURITY
IMO 1047495
|
61,415 | 2025 |
3.3
|
A |
| 6 |
XIANG FU
IMO 9998121
|
61,659 | 2025 |
3.4
|
A |
| 7 |
GREEN OSHIMA
IMO 1027354
|
73,658 | 2024 |
3.4
|
A |
| 8 |
OSPREY ARROW
IMO 9687174
|
62,841 | 2015 |
3.5
|
A |
| 9 |
GREEN YOKOHAMA
IMO 1027378
|
73,674 | 2025 |
3.5
|
A |
| 10 |
GREEN PECEM
IMO 9976484
|
77,173 | 2024 |
3.6
|
A |
| 11 |
GREEN RIO GRANDE
IMO 9976422
|
77,245 | 2024 |
3.7
|
A |
| 12 |
PACIFIC SERENITY
IMO 1047500
|
61,390 | 2025 |
3.8
|
A |
| 13 |
CORELLA ARROW
IMO 9385477
|
72,863 | 2009 |
3.8
|
A |
| 15 |
GREEN NAGOYA
IMO 1027366
|
73,674 | 2024 |
3.8
|
A |
| 14 |
HONG FU
IMO 9998078
|
61,636 | 2024 |
3.8
|
A |
| 16 |
PACIFIC TITAN
IMO 9913224
|
61,629 | 2022 |
3.9
|
A |
| 17 |
JIN FU
IMO 9998054
|
61,680 | 2024 |
3.9
|
A |
| 18 |
SHUN FU
IMO 9998107
|
61,649 | 2025 |
3.9
|
A |
| 19 |
PACIFIC PROVIDENCE
IMO 1047483
|
61,419 | 2025 |
3.9
|
A |
| 20 |
UROPHYLLA
IMO 9825013
|
62,321 | 2020 |
3.9
|
A |
| 22 |
GREEN ITAJAI
IMO 9976446
|
77,202 | 2024 |
3.9
|
A |
| 21 |
SISKIN ARROW
IMO 9607095
|
72,927 | 2014 |
3.9
|
A |
| 23 |
GUANG FU
IMO 9998028
|
61,726 | 2024 |
3.9
|
A |
| 25 |
TOKI ARROW
IMO 9434539
|
62,942 | 2010 |
4.0
|
A |
| 24 |
GREEN PARANAGUA
IMO 9976434
|
64,993 | 2024 |
4.0
|
A |
| 26 |
PACIFIC PROSPECT
IMO 9913212
|
61,596 | 2022 |
4.0
|
A |
| 27 |
SSI FURIOUS
IMO 9960174
|
37,973 | 2023 |
4.0
|
A |
| 28 |
TAI FU
IMO 9998080
|
61,702 | 2024 |
4.0
|
A |
| 29 |
TAWA ARROW
IMO 9401879
|
54,274 | 2008 |
4.0
|
A |
| 30 |
ROBUSTA
IMO 9824992
|
62,361 | 2019 |
4.0
|
A |
| 31 |
GRANDIS
IMO 9824980
|
62,343 | 2019 |
4.0
|
A |
| 32 |
COSCO SHIPPING CHANG QING
IMO 9872171
|
62,000 | 2020 |
4.1
|
A |
| 33 |
DEVBULK GULTEN
IMO 9659189
|
40,614 | 2013 |
4.1
|
A |
| 34 |
ZHONG YUAN HAI YUN CHUANG XIN
IMO 9837652
|
62,041 | 2019 |
4.1
|
A |
| 35 |
TAI XING
IMO 9930909
|
61,642 | 2021 |
4.1
|
A |
| 36 |
TUNA S
IMO 9779032
|
38,575 | 2019 |
4.1
|
A |
| 37 |
DEVBULK SADIYE
IMO 9711705
|
37,322 | 2015 |
4.1
|
A |
| 38 |
LAKE PEARL
IMO 9401984
|
51,687 | 2010 |
4.1
|
A |
| 39 |
GREEN ITAQUI
IMO 9976410
|
77,285 | 2024 |
4.2
|
A |
| 40 |
COSCO SHIPPING XING WANG
IMO 9872183
|
62,013 | 2020 |
4.2
|
A |
| 41 |
ACER ARROW
IMO 9720043
|
61,066 | 2014 |
4.2
|
A |
| 42 |
YONG XING
IMO 9930911
|
61,642 | 2022 |
4.2
|
A |
| 43 |
DUNNII
IMO 9824978
|
62,346 | 2019 |
4.2
|
A |
| 44 |
GREEN KEMI
IMO 9976044
|
68,058 | 2023 |
4.2
|
A |
| 45 |
COSCO SHIPPING TENG DA
IMO 9928932
|
61,645 | 2023 |
4.2
|
A |
| 46 |
COSCO SHIPPING GLORY
IMO 9881641
|
61,961 | 2020 |
4.2
|
A |
| 48 |
PELICAN ARROW
IMO 9495923
|
62,942 | 2011 |
4.2
|
A |
| 47 |
COSCO SHIPPING WISDOM
IMO 9928889
|
61,570 | 2022 |
4.2
|
A |
| 49 |
SALIGNA
IMO 9825001
|
62,358 | 2019 |
4.3
|
A |
| 50 |
SAGA FREYA
IMO 9502336
|
55,807 | 2017 |
4.3
|
A |
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.