Navalyze · Oil tanker · Ship

IASONAS

IMO: 9419357
Type: Oil tanker
Average cargo carried: 87,078 t
Flag (estimated): Liberia
Port of registry: Monrovia
Technical efficiency: EEXI 3.30 g CO₂/t·nm

ISM company (DoC holder) in 2025: LIQUIMAR TANKERS MANAGEMENT SERVICES INC.

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 87,078 t of cargo on average.

Fuel kg/nm

146

Oil tanker median 129 kg/nm (+14%)

CO₂ per transport work (cargo)

5.26

g CO₂/t·nm · Oil tanker median 7.95 (−34%)

Average speed

11.5 kn

Oil tanker median 10.7 kn (+7%)

Fuel per day at sea

40.2 t/day

Fuel consumed

3,913 t

CO₂ emitted

12,260 t

12,452 t CO₂eq incl. CH₄ and N₂O

Distance sailed

26,766 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,337 h

97 days, 27% 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 146 kg/nm · median 129 (+14%)

76.1Ranks 1,111 of 1,665, lowest first191

Average speedThis ship 11.5 kn · median 10.7 (+7%)

8.0Faster than 73% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 5.26 g CO₂/t·nm · median 7.95 (−34%)

4.51Ranks 305 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions 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 ports0%
From the EU11%
Into the EU80%
At berth in the EU9%

55% of this ship's CO₂ falls under the EU ETS (6,702 t).

Fuel burned laden

3,123 t

80% of all fuel; 20% in ballast or unladen

CO₂ at berth

1,134 t

9.3% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+192 t

+1.6% CO₂eq on top of CO₂ alone, from CH₄ and N₂O; counted in full from 2026

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

IASONAS
Oil tanker median

120.0140.0160.0180.0

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

Average speed, kn

IASONAS
Oil tanker median

9.010.011.012.0

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

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

IASONAS
Oil tanker median

4.06.08.010.012.014.0

’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	+1.2 kn	−4%	+7%	+9%	−30%	1.2 kn faster, fuel per mile down 4%; better than speed alone explains (hull, engine or trade).
2022→2024	+0.9 kn	+1%	+11%	−9%	+6%	0.9 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	−2.0 kn	+20%	−1%	+104%	−43%	2.0 kn slower, fuel per mile up 20%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.3 kn	−15%	−17%	−60%	+127%	Same speed, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.7 kn	−14%	+0%	+320%	−5%	1.7 kn faster, fuel per mile down 14%; better than speed alone explains (hull, engine 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	LIQUIMAR TANKERS MANAGEMENT SERVICES INC.	3,913	12,260	26,766	2,337	11.5	146	5.26	80%
2024	LIQUIMAR TANKERS MANAGEMENT SERVICES INC.	3,722	11,676	24,495	2,371	10.3	152	7.49	56%
2022	not published	4,054	12,795	26,882	2,852	9.4	151	7.08	69%
2021	not published	1,650	5,216	13,170	1,156	11.4	125	12.5	39%
2020	not published	4,859	15,363	33,154	2,839	11.7	147	5.51	–
2019	not published	1,344	4,238	7,893	786	10.0	170	5.78	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	LIQUIMAR TANKERS MANAGEMENT SERVICES INC.	5.26	7.95	−34%	305 of 1,665	ABS	A
2024	LIQUIMAR TANKERS MANAGEMENT SERVICES INC.	7.49	8.06	−7%	777 of 1,787	ABS	A
2022	not published	7.08	8.51	−17%	694 of 1,961	ABS	A
2021	not published	12.5	8.86	+41%	1,251 of 1,789	ABS	A
2020	not published	5.51	9.03	−39%	284 of 1,870	ABS	A
2019	not published	5.78	8.83	−35%	382 of 1,919	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.