Most Emission-Efficient Chemical Tankers
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 |
|---|---|---|---|---|---|
| 1151 |
ALANGOVA
IMO 9411927
|
12,089 | 2008 |
14.9
|
E |
| 1152 |
KORSARO
IMO 9373137
|
25,997 | 2008 |
14.9
|
E |
| 1153 |
NQ MORINA
IMO 9243382
|
16,882 | 2002 |
14.9
|
E |
| 1154 |
OWL 6
IMO 9340350
|
13,006 | 2007 |
15.1
|
E |
| 1155 |
TORC
IMO 9544683
|
13,214 | 2010 |
15.1
|
E |
| 1156 |
APATYTH
IMO 9970739
|
8,116 | 2024 |
15.1
|
E |
| 1157 |
TEQUILA
IMO 9345219
|
13,016 | 2007 |
15.1
|
E |
| 1158 |
YM MIRANDA
IMO 9554755
|
12,933 | 2013 |
15.2
|
E |
| 1159 |
RIVER OAK
IMO 9438157
|
13,133 | 2007 |
15.2
|
E |
| 1160 |
CHEMICAL SAILOR
IMO 9804875
|
12,520 | 2019 |
15.2
|
E |
| 1161 |
HARBOUR FIRST
IMO 9473119
|
16,894 | 2011 |
15.3
|
E |
| 1162 |
MOSTRAUM
IMO 9829784
|
10,247 | 2019 |
15.3
|
E |
| 1163 |
ANGELINA AMORETTI
IMO 9279202
|
23,740 | 2004 |
15.4
|
E |
| 1164 |
SYDSTRAUM
IMO 9854478
|
10,191 | 2020 |
15.4
|
E |
| 1165 |
SONGA ORION
IMO 9831024
|
17,916 | 2020 |
15.5
|
E |
| 1166 |
SONGA CRYSTAL
IMO 9378321
|
12,927 | 2006 |
15.5
|
E |
| 1167 |
ATLANTIC TWIN
IMO 9341328
|
15,212 | 2008 |
15.5
|
E |
| 1168 |
EVA HONGKONG
IMO 9800001
|
19,861 | 2017 |
15.5
|
E |
| 1169 |
MENTOR
IMO 9340374
|
13,013 | 2007 |
15.5
|
E |
| 1170 |
IVER ABILITY
IMO 9327504
|
12,497 | 2006 |
15.5
|
E |
| 1171 |
CLYDE FISHER
IMO 9298416
|
12,984 | 2005 |
15.5
|
E |
| 1172 |
CARIBE LUNA
IMO 9352133
|
13,157 | 2006 |
15.5
|
E |
| 1173 |
NQ BELLIS
IMO 9192375
|
15,200 | 2000 |
15.6
|
E |
| 1174 |
MAVKA
IMO 9284647
|
13,586 | 2004 |
15.7
|
E |
| 1175 |
MT BANDIRMA
IMO 9120243
|
9,584 | 1996 |
15.7
|
E |
| 1176 |
SOLERO
IMO 9428085
|
19,992 | 2009 |
15.7
|
E |
| 1177 |
KIVALLIQ W.
IMO 9187409
|
13,671 | 2004 |
15.8
|
E |
| 1178 |
ORIS GRACE
IMO 9658422
|
7,054 | 2012 |
15.8
|
E |
| 1179 |
GOLDEN DAISY
IMO 9878008
|
34,810 | 2015 |
15.8
|
E |
| 1180 |
SUULA
IMO 9267560
|
14,665 | 2005 |
15.8
|
E |
| 1181 |
WINDSOR
IMO 9542130
|
19,997 | 2010 |
15.9
|
E |
| 1182 |
YM JUPITER
IMO 9291597
|
15,995 | 2007 |
15.9
|
E |
| 1183 |
CHRISTINA
IMO 9118496
|
9,494 | 1996 |
15.9
|
E |
| 1184 |
EXCELLO
IMO 9308558
|
19,999 | 2008 |
15.9
|
E |
| 1185 |
K ONSET
IMO 9359595
|
12,902 | 2006 |
15.9
|
E |
| 1186 |
EKFJORD
IMO 9356622
|
17,006 | 2009 |
16.0
|
E |
| 1187 |
GOLDEN ORCHID
IMO 9486178
|
17,055 | 2009 |
16.0
|
E |
| 1188 |
ASKHOLMEN
IMO 9436381
|
16,801 | 2009 |
16.0
|
E |
| 1189 |
FMT BERGAMA
IMO 9427988
|
14,353 | 2007 |
16.1
|
E |
| 1190 |
KARLICA
IMO 9220354
|
12,000 | 2000 |
16.1
|
E |
| 1191 |
T VEGA
IMO 9323766
|
19,807 | 2006 |
16.1
|
E |
| 1192 |
BOSNIA
IMO 9445643
|
13,210 | 2008 |
16.1
|
E |
| 1193 |
NQ ROSA
IMO 9304318
|
8,807 | 2004 |
16.1
|
E |
| 1194 |
TRANS EXETER
IMO 9314753
|
9,437 | 2004 |
16.2
|
E |
| 1195 |
SCOT BREMEN
IMO 9260835
|
8,211 | 2003 |
16.2
|
E |
| 1196 |
W NORTH
IMO 9272735
|
8,501 | 2003 |
16.2
|
E |
| 1197 |
TANKER BEE 10
IMO 9382114
|
7,915 | 2007 |
16.2
|
E |
| 1198 |
HICRIKAAN
IMO 9171474
|
10,378 | 1998 |
16.3
|
E |
| 1199 |
CHEMICAL TRAVELLER
IMO 9804851
|
12,522 | 2019 |
16.3
|
E |
| 1200 |
KONGO STAR
IMO 9508823
|
13,011 | 2010 |
16.3
|
E |
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.