Oil Tanker Emissions & Retrofit Radar

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.

Segment rank (2025)

#109 of 1,651 oil tankers

CO₂ intensity

2.2 g CO₂/dwt·nm

vs segment average (5.18)

-57% greener

Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

CII band distribution

551 at D/E

A 411B 557C 556D 354E 197

2,075 rated vessels · 250 of the D/E set dock within 12 months

Docking pipeline — D/E vessels per quarter

'27 Q1

'27 Q2

'27 Q3

'27 Q4

'28 Q1

'28 Q2

'28 Q3

Windows estimated from the class-expiry docking model, not bookings.

Top eligible retrofit measures for this segment

Measure	Eligible	CO₂ reduction	Capex band	Payback	Confidence
Propeller redesign / replacement	1,790	5–10%	€400k–1,200k	—	vendor claim
Bulbous bow reprofiling	1,674	2–6%	€300k–900k	—	vendor claim
Turbocharger cut-out	1,267	1–3%	€80k–250k	—	vendor claim
Methanol dual-fuel conversion	1,163	5–15%	€8,000k–20,000k	—	vendor claim
LNG dual-fuel conversion	1,129	15–25%	€15,000k–35,000k	—	vendor claim
Rotor sails (per unit)	1,052	route-dependent	€1,500k–3,500k	—	vendor claim

Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.

Retrofit opportunity in this segment

392

D/E vessels with at least one eligible measure

€1,483–3,536M

capex range, top measure per vessel (392 of 392 with computable scaling)

0.25–0.46 Mt

annual CO₂ reduction available (vendor-claimed ranges × reported emissions)

Retrofit prospects — worst band first

Vessel	Band	Age	Drop year	Req. reduction 2030	Dock window
PAULA GLORY · 25-60k	E	3y	2026	100%	Sep 2026
OLYMPIC TROPHY · >200k	E	16y	2026	99%	Jul 2030
SEALING · 25-60k	E	23y	2026	99%	Feb 2028
EOS T · <25k	E	20y	2026	97%	Aug 2026
HERCULES SUN · <25k	E	4y	2026	94%	Aug 2027

See all 2,075 rated oil tankers with exposure and dock windows. Sign in →

Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates

Size (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

1,685

vessels ranked

1.32

greenest (g CO₂/dwt·nm)

4.01

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
100	NAVE ALLEGRO IMO 9876414	313,433	2020	339 m	MAN - 7G80ME-C9	2.2	A
102	PROTEUS INGRID IMO 9923463	119,900	2020	250 m	Wärtsilä - 6X62DF	2.2	A
103	NISSOS HERACLEA IMO 9419618	313,875	2009	336 m	MAN - 6S90MC-C	2.2	A
104	MAXIM IMO 9604079	296,887	2011	330 m	CSSC - 7S80MC	2.2	A
105	ADVANTAGE SMOOTH IMO 9999620	174,728	2023	274 m	MAN-B&W 6G70ME-C10	2.2	A
108	EAGLE VALLERY IMO 9910246	299,473	2022	330 m	Doosan Engine Co. Ltd. 7X82DF	2.2	A
107	MARAN ARIADNE IMO 9770517	319,398	2016	336 m	Hyundai - 7G80ME-C9	2.2	A
106	IONIC SEMELI IMO 1037933	159,120	2025	274 m	MAN-B&W 7S60ME-C10	2.2	A
109	DHT EUROPE IMO 9315159	317,713	2007	333 m	MAN - 6S90MC-C	2.2	A
110	NORTH LOYALTY IMO 9537771	314,000	2012	332 m	STX - 6S90MC-C	2.2	A
111	NEW ENERGY IMO 9708526	318,866	2016	333 m	Doosan - 7G80ME-C9	2.3	A
112	ITHAKI IMO 9526461	299,940	2011	333 m	HHI - 6S90MC-C7	2.3	A
113	NEW MELODY IMO 9799185	307,431	2019	333 m	MAN - 7G80ME-C9	2.3	A
114	SONANGOL NJINGA MBANDE IMO 9938494	157,663	2023	274 m	Hyundai - 6G70ME-C9	2.3	A
115	NEW PEARL IMO 9468322	301,525	2011	333 m	Wärtsilä - 7RTA84T	2.3	A
117	IONIAN SAILOR IMO 9296389	149,997	2006	274 m	Diesel United - 6RTA72	2.3	A
116	TRINITY IMO 9730361	158,734	2014	274 m	Hyundai - 5G70ME-C9	2.3	A
118	IMOLA IMO 1014876	156,906	2025	270 m	MAN-B&W 6G70ME-C10	2.3	A
120	SONANGOL MAIOMBE IMO 9766322	156,935	2017	274 m	Doosan - 6G70ME-C9	2.3	A
119	NORDIC TELLUS IMO 9818230	157,407	2018	277 m	Doosan - 6X72	2.3	A
122	AZURE NOVA IMO 9602631	319,743	2012	333 m	Hyundai - 6S90ME-C	2.3	A
121	LAUSANNE STAR IMO 1028530	158,100	2025	274 m	MAN-B&W 6G70ME-C10	2.3	A
123	DELTA COMMANDER IMO 9418157	157,477	2010	274 m	MAN - 6S70MC-C	2.3	A
126	EAGLE SAN FRANCISCO IMO 9795127	157,512	2018	277 m	Hyundai - 5X72	2.3	A
125	HARMONIC IMO 9819868	159,204	2015	274 m	Mitsui - 7S65ME-C8	2.3	A
124	DELTA MARIA IMO 9700691	157,031	2015	274 m	MAN - 6G70ME-C9	2.3	A
127	BOLD WARRIOR IMO 1058092	156,885	2025	274 m	MAN-B&W 6G70ME-C10	2.4	A
128	MONTESPERANZA IMO 9585871	159,179	2012	274 m	Doosan - 6S70ME-C8	2.4	A
129	SEAWAYS MONTAUK IMO 9779537	158,432	2017	274 m	Hyundai - 6G70ME-C9	2.4	A
130	MARLIN SOMERSET IMO 9835850	156,620	2017	274 m	CSSC - 6G70ME-C9	2.4	A
132	SEA AMETHYST IMO 9920693	157,146	2020	277 m	MAN - 6G70ME-C10	2.4	A
131	UNION PEACE IMO 9339973	311,141	2007	333 m	MAN - 7S80MC-C	2.4	A
134	C. INNOVATOR IMO 9595618	313,999	2012	333 m	MAN - 7S80ME-C8	2.4	A
133	ADVANTAGE SMART IMO 1028683	159,097	2025	274 m	—	2.4	A
138	CEDAR IMO 9907433	158,289	2022	274 m	6G60ME-C10.5	2.4	A
140	AESOP IMO 1030399	158,954	2025	274 m	MAN-B&W 7S60ME-C10	2.4	A
137	BRUGGE IMO 9941855	157,138	2023	270 m	Hyundai Heavy Industries Co. Ltd. 6G70ME-C10-HPSCR	2.4	A
136	VL PRIME IMO 9683685	319,547	2015	333 m	Hyundai - 6G80ME-C9.2	2.4	A
135	SEATRIUMPH IMO 9783722	299,700	2015	333 m	Hyundai - 7G80ME-C9	2.4	A
139	EAGLE SAN JOSE IMO 9795139	157,512	2018	277 m	Hyundai - 6X72	2.4	A
142	YASA SOUTHERN CROSS IMO 9534030	318,438	2006	333 m	HHI - 7RT- FLEX 84T-D	2.4	A
141	TWIN POLLUX IMO 9625968	320,475	2014	332 m	Wärtsilä - 7RT-flex82T	2.4	A
144	DIMITRIOS IMO 9900007	159,159	2021	274 m	MAN - 7S65ME-C8	2.4	A
145	SATURN MOON IMO 9814430	158,000	2015	274 m	CSSC - 6G70ME-C9	2.4	A
143	GULF SUNRISE IMO 9788887	301,528	2017	336 m	Hyundai - 7G80ME-C9	2.4	A
146	PATRIOTIC IMO 9819832	159,090	2015	274 m	MAN - 7S65ME-C8.5	2.4	A
147	PASCHALIS DD IMO 9765378	159,812	2018	274 m	Hyundai - 6S70ME-C9	2.4	A
150	FRONT CLASSIC IMO 9759769	157,434	2017	276 m	CSSC - 6G70ME-C9	2.5	A
149	KIMOLOS IMO 9791145	159,159	2018	274 m	Mitsui - 7S65ME-C8.5	2.5	A
148	MARAN THETIS IMO 9421427	320,105	2012	333 m	MAN - 6S90MC-C	2.5	A

Page 3 of 34 — 1,651 vessels

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Engine intelligence

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.

Emission-friendly engine ranking

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.