Most Emission-Efficient Ro-Ro 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 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 |
|---|---|---|---|---|---|
| 1 |
ENDURANCE
IMO 9121273
|
48,988 | 1996 |
7.1
|
A |
| 2 |
JASMINE LEADER
IMO 9925368
|
19,359 | 2023 |
13.1
|
A |
| 3 |
LAURELINE
IMO 9823352
|
20,615 | 2019 |
13.7
|
A |
| 4 |
SIXTINE
IMO 9831165
|
20,615 | 2019 |
14.0
|
A |
| 5 |
YSALINE
IMO 9823364
|
20,615 | 2019 |
14.0
|
A |
| 6 |
SAFFET BEY
IMO 8417118
|
14,107 | 1987 |
14.3
|
A |
| 7 |
HERMINE
IMO 9831177
|
20,615 | 2019 |
14.4
|
A |
| 8 |
ULUSOY-5
IMO 8501464
|
14,103 | 1987 |
14.6
|
A |
| 9 |
SERAPHINE
IMO 9889710
|
20,092 | 2022 |
14.6
|
A |
| 10 |
FAUSTINE
IMO 9889708
|
20,194 | 2021 |
15.8
|
A |
| 11 |
DONG-A METIS
IMO 9419747
|
22,582 | 2010 |
16.0
|
A |
| 12 |
DONG-A GLAUCOS
IMO 9441867
|
26,985 | 2011 |
16.1
|
A |
| 13 |
BOTNIA ENABLER
IMO 9884679
|
24,600 | 2022 |
16.1
|
A |
| 14 |
BALTIC ENABLER
IMO 9884681
|
24,600 | 2022 |
17.1
|
A |
| 15 |
DELPHINE
IMO 9789245
|
27,687 | 2018 |
17.2
|
A |
| 16 |
ORANJEBORG
IMO 9232797
|
15,126 | 2004 |
17.5
|
A |
| 17 |
YOUNG SHIN
IMO 9021332
|
14,274 | 1992 |
17.8
|
A |
| 18 |
CELINE
IMO 9789233
|
27,687 | 2017 |
17.8
|
A |
| 19 |
LIDER HALUK
IMO 8404276
|
9,334 | 1985 |
18.3
|
A |
| 20 |
ARK FUTURA
IMO 9129598
|
13,500 | 1996 |
18.5
|
A |
| 21 |
HOEGH BRASILIA
IMO 9368895
|
17,252 | 2007 |
18.9
|
A |
| 22 |
GLOVIS COUNTESS
IMO 9476721
|
18,701 | 2010 |
19.1
|
A |
| 23 |
NEPTUNE LEADER
IMO 9402744
|
12,853 | 2008 |
19.3
|
A |
| 24 |
HOEGH SYDNEY
IMO 9368900
|
17,311 | 2007 |
20.0
|
A |
| 25 |
MAZARINE
IMO 9376696
|
14,552 | 2009 |
20.9
|
A |
| 26 |
SC CONNECTOR
IMO 9131993
|
8,843 | 1997 |
20.9
|
A |
| 27 |
SCA ORTVIKEN
IMO 9087374
|
11,521 | 1996 |
21.1
|
A |
| 28 |
PALATINE
IMO 9376701
|
14,565 | 2009 |
21.1
|
A |
| 29 |
PEREGRINE
IMO 9376725
|
14,538 | 2010 |
21.7
|
A |
| 30 |
EUROCARGO ISTANBUL
IMO 9165310
|
13,179 | 1998 |
22.0
|
A |
| 31 |
SCA OSTRAND
IMO 9087362
|
11,561 | 1996 |
22.0
|
A |
| 32 |
SOMERSET
IMO 9188221
|
12,500 | 1999 |
22.1
|
A |
| 33 |
MOSEL ACE
IMO 9177052
|
12,761 | 2000 |
22.2
|
A |
| 34 |
ECO MEDITERRANEA
IMO 9859595
|
18,102 | 2022 |
22.3
|
A |
| 35 |
VESPERTINE
IMO 9376713
|
14,483 | 2010 |
22.3
|
A |
| 36 |
VASSILIOS
IMO 8813154
|
13,772 | 1990 |
22.4
|
A |
| 37 |
BALTIC BRIGHT
IMO 9129263
|
6,302 | 1995 |
22.4
|
A |
| 38 |
ECO ITALIA
IMO 9859612
|
18,080 | 2022 |
22.5
|
A |
| 39 |
FERRYMAR
IMO 9966805
|
6,726 | 2023 |
22.6
|
A |
| 40 |
CATHERINE
IMO 9209453
|
13,320 | 2002 |
22.9
|
A |
| 41 |
SCA OBBOLA
IMO 9087350
|
11,446 | 1996 |
22.9
|
A |
| 42 |
EPHESUS SEAWAYS
IMO 9816830
|
17,011 | 2019 |
23.3
|
A |
| 43 |
TAVASTLAND
IMO 9334959
|
13,800 | 2006 |
23.4
|
A |
| 44 |
TROY SEAWAYS
IMO 9816842
|
17,183 | 2019 |
23.4
|
B |
| 45 |
GALATA SEAWAYS
IMO 9422134
|
15,121 | 2010 |
23.5
|
B |
| 46 |
SUMELA SEAWAYS
IMO 9356749
|
14,915 | 2008 |
23.6
|
B |
| 47 |
LINK SUN
IMO 8805597
|
4,452 | 1989 |
23.6
|
B |
| 48 |
AMILCAR
IMO 9207998
|
14,268 | 2000 |
23.7
|
B |
| 49 |
MYRA SEAWAYS
IMO 9422122
|
15,391 | 2009 |
23.7
|
B |
| 50 |
ULUSOY-15
IMO 9506265
|
13,231 | 2013 |
23.8
|
B |
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.