Most Emission-Efficient Vehicle 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 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 |
TØNSBERG
IMO 9515383
|
43,878 | 2011 |
8.8
|
A |
| 2 |
SALOME
IMO 9515412
|
43,878 | 2012 |
8.8
|
A |
| 3 |
PARSIFAL
IMO 9515395
|
43,878 | 2011 |
8.9
|
A |
| 4 |
HOEGH AUSTRALIS
IMO 9962691
|
25,552 | 2025 |
9.1
|
A |
| 5 |
HOEGH MOONLIGHT
IMO 9971252
|
25,610 | 2025 |
9.4
|
A |
| 6 |
HOEGH SUNRISE
IMO 9971264
|
25,517 | 2025 |
9.5
|
A |
| 7 |
TYSLA
IMO 9515400
|
43,878 | 2012 |
9.8
|
A |
| 8 |
HOEGH BOREALIS
IMO 9962689
|
25,587 | 2024 |
9.9
|
A |
| 9 |
HOEGH SUNLIGHT
IMO 9962706
|
25,200 | 2025 |
10.1
|
A |
| 10 |
HOEGH AURORA
IMO 9962677
|
25,563 | 2024 |
10.3
|
A |
| 11 |
MANON
IMO 9179725
|
28,360 | 1999 |
10.7
|
A |
| 12 |
ARC INTEGRITY
IMO 9332949
|
30,386 | 2008 |
10.7
|
A |
| 13 |
ARC COMMITMENT
IMO 9505039
|
31,143 | 2011 |
10.7
|
A |
| 14 |
CM SHEN ZHEN
IMO 1040289
|
25,640 | 2026 |
10.8
|
A |
| 15 |
ARC INDEPENDENCE
IMO 9332925
|
30,383 | 2007 |
10.8
|
A |
| 16 |
DORADO LEADER
IMO 9308895
|
21,550 | 2006 |
10.8
|
A |
| 17 |
WAY FORWARD
IMO 9945617
|
18,565 | 2024 |
10.9
|
A |
| 18 |
NABUCCO
IMO 9731652
|
23,959 | 2021 |
10.9
|
A |
| 19 |
CAELUM ACE
IMO 1026324
|
19,893 | 2025 |
10.9
|
A |
| 21 |
EMDEN
IMO 9941788
|
19,243 | 2023 |
11.1
|
A |
| 20 |
ANIARA
IMO 9377494
|
30,089 | 2008 |
11.1
|
A |
| 22 |
TIRRANNA
IMO 9377523
|
30,089 | 2009 |
11.1
|
A |
| 23 |
HOEGH ST. PETERSBURG
IMO 9420045
|
27,352 | 2009 |
11.2
|
A |
| 24 |
TURQUOISE ACE
IMO 9969132
|
18,439 | 2024 |
11.2
|
A |
| 25 |
FUTURE WAY
IMO 9945590
|
18,610 | 2024 |
11.2
|
A |
| 26 |
HOEGH TRADER
IMO 9171280
|
27,100 | 1998 |
11.2
|
A |
| 27 |
HOEGH SHANGHAI
IMO 9312482
|
27,178 | 2007 |
11.2
|
A |
| 28 |
OBERON
IMO 9377509
|
30,134 | 2008 |
11.3
|
A |
| 29 |
MORNING LUCY
IMO 9383431
|
28,080 | 2009 |
11.4
|
A |
| 30 |
ANGELITE ACE
IMO 1024376
|
18,473 | 2025 |
11.4
|
A |
| 31 |
TIJUCA
IMO 9377511
|
30,089 | 2008 |
11.5
|
A |
| 32 |
TOURMALINE ACE
IMO 9979084
|
18,467 | 2024 |
11.6
|
A |
| 33 |
DON CARLOS
IMO 9122655
|
28,142 | 1997 |
11.6
|
A |
| 34 |
HOEGH LONDON
IMO 9342205
|
27,100 | 2008 |
11.6
|
A |
| 35 |
HOEGH COPENHAGEN
IMO 9420057
|
27,175 | 2010 |
11.6
|
A |
| 36 |
MORNING LISA
IMO 9383417
|
28,084 | 2008 |
11.7
|
A |
| 37 |
HOEGH BERLIN
IMO 9295842
|
27,178 | 2005 |
11.7
|
A |
| 38 |
LAKE TRAVIS
IMO 9964297
|
19,200 | 2025 |
11.7
|
A |
| 39 |
LAPIS ACE
IMO 9991159
|
18,377 | 2024 |
11.7
|
A |
| 40 |
TALISMAN
IMO 9191319
|
38,500 | 2000 |
11.8
|
A |
| 41 |
CM HONG KONG
IMO 1040277
|
25,505 | 2025 |
11.8
|
A |
| 42 |
ARC ENDEAVOR
IMO 9505065
|
28,837 | 2011 |
11.9
|
A |
| 44 |
ARC DEFENDER
IMO 9375264
|
22,144 | 2008 |
11.9
|
A |
| 43 |
HOEGH ASIA
IMO 9191876
|
27,564 | 2000 |
11.9
|
A |
| 45 |
CELESTE ACE
IMO 9982990
|
19,914 | 2024 |
11.9
|
A |
| 46 |
TETHYS HIGHWAY
IMO 1046051
|
19,753 | 2025 |
12.1
|
A |
| 47 |
DAISY LEADER
IMO 9960227
|
18,605 | 2024 |
12.1
|
A |
| 48 |
LAKE SAINT ANNE
IMO 9994113
|
19,216 | 2025 |
12.2
|
A |
| 49 |
CIELO ACE
IMO 9999383
|
19,853 | 2025 |
12.2
|
A |
| 50 |
TITUS
IMO 9700512
|
23,889 | 2018 |
12.2
|
A |
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.