Navalyze · Oil tanker · Ship

SIREN

IMO: 9405423
Type: Oil tanker
Average cargo carried: 66,976 t
Flag (estimated): Liberia
Port of registry: Monrovia
Technical efficiency: EEXI 2.83 g CO₂/t·nm
Former names: SERENEA

ISM company (DoC holder) in 2025: Eurotankers Inc

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 76,518 t of cargo on average.

Fuel kg/nm

167

Oil tanker median 140 kg/nm (+20%)

CO₂ per transport work (cargo)

6.85

g CO₂/t·nm · Oil tanker median 8.86 (−23%)

Average speed

12.3 kn

Oil tanker median 9.8 kn (+26%)

Fuel per day at sea

49.4 t/day

Fuel consumed

8,048 t

CO₂ emitted

25,204 t

Distance sailed

48,086 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,908 h

163 days, 45% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 108 kg/nm · median 129 (−16%)

76.1Ranks 486 of 1,665, lowest first191

Average speedThis ship 11.7 kn · median 10.7 (+9%)

8.0Faster than 80% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 5.02 g CO₂/t·nm · median 7.95 (−37%)

4.51Ranks 268 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2018

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports3%
From the EU46%
Into the EU45%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

1,328 t

5.3% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The Oil tanker median is the middle ship of all oil tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

SIREN
Oil tanker median

100.0150.0200.0250.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

SIREN
Oil tanker median

6.08.010.012.014.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

SIREN
Oil tanker median

4.06.08.010.012.0

’182018’192019’202020’212021’222022’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+4.5 kn	−28%	+16%	+1%	−3%	4.5 kn faster, fuel per mile down 28%; better than speed alone explains (hull, engine or trade).
2023→2024	−2.4 kn	−21%	−41%	−45%	–	2.4 kn slower, fuel per mile down 21%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−2.4 kn	+6%	−15%	−36%	–	2.4 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+1.4 kn	+2%	+15%	+33%	+15%	1.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2020→2021	−2.6 kn	+4%	−16%	+5%	−56%	2.6 kn slower, fuel per mile up 4%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+3.3 kn	−24%	+1%	−4%	+68%	3.3 kn faster, fuel per mile down 24%; better than speed alone explains (hull, engine or trade).
2018→2019	−2.4 kn	+33%	+7%	−60%	−11%	2.4 kn slower, fuel per mile up 33%; worse than speed alone explains (fouling, weather, loading or trade).

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	Eurotankers Inc	1,003	3,129	9,307	794	11.7	108	5.02	49%
2024	Eurotankers Inc	1,385	4,321	9,208	1,273	7.2	150	5.15	–
2023	not published	3,181	9,951	16,641	1,738	9.6	191	–	59%
2022	not published	4,670	14,586	25,997	2,166	12.0	180	5.23	73%
2021	not published	3,463	10,827	19,609	1,842	10.6	177	4.54	–
2020	not published	3,175	9,903	18,704	1,421	13.2	170	10.2	–
2019	not published	4,312	13,524	19,383	1,955	9.9	223	6.10	–
2018	not published	8,048	25,204	48,086	3,908	12.3	167	6.85	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Eurotankers Inc	5.02	7.95	−37%	268 of 1,665	ICS Verification Services	A
2024	Eurotankers Inc	5.15	8.06	−36%	320 of 1,787	ICS Verification Services	A
2023	not published	–	–	–	–	ABS	A
2022	not published	5.23	8.51	−39%	286 of 1,961	ABS	A
2021	not published	4.54	8.86	−49%	152 of 1,789	ABS	A
2020	not published	10.2	9.03	+13%	1,086 of 1,870	ABS	A
2019	not published	6.10	8.83	−31%	441 of 1,919	ABS	A
2018	not published	6.85	8.86	−23%	553 of 1,779	ABS	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's oil tanker ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.