Navalyze · Oil tanker · Ship

ARISTEA

IMO: 9791315
Type: Oil tanker
Average cargo carried: 45,946 t
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEXI 3.19 g CO₂/t·nm

ISM company (DoC holder) in 2025: Chandris Hellas Inc

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 45,946 t of cargo on average.

Fuel kg/nm

116

Oil tanker median 129 kg/nm (−10%)

CO₂ per transport work (cargo)

7.95

g CO₂/t·nm · Oil tanker median 7.95 (+0%)

Average speed

11.2 kn

Oil tanker median 10.7 kn (+5%)

Fuel per day at sea

31.2 t/day

Fuel consumed

5,476 t

CO₂ emitted

17,212 t

17,481 t CO₂eq incl. CH₄ and N₂O

Distance sailed

47,122 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,217 h

176 days, 48% 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 116 kg/nm · median 129 (−10%)

76.1Ranks 604 of 1,665, lowest first191

Average speedThis ship 11.2 kn · median 10.7 (+5%)

8.0Faster than 64% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 7.95 g CO₂/t·nm · median 7.95 (+0%)

4.51Ranks 833 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 ports3%
From the EU40%
Into the EU51%
At berth in the EU6%

55% of this ship's CO₂ falls under the EU ETS (9,451 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,096 t

6.4% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+269 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

ARISTEA
Oil tanker median

100.0110.0120.0130.0140.0

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

Average speed, kn

ARISTEA
Oil tanker median

9.010.011.012.013.0

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

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

ARISTEA
Oil tanker median

5.06.07.08.09.010.0

’182018’192019’202020’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.8 kn	+2%	−5%	−6%	+18%	0.8 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.6 kn	+8%	+3%	+121%	–	0.6 kn slower, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	–	–	–	–	–
2021→2022	–	–	–	–	–
2020→2021	–	–	–	–	–
2019→2020	+2.3 kn	+28%	+59%	+400%	+5%	2.3 kn faster, fuel per mile up 28%; better than speed alone explains (hull, engine or trade).
2018→2019	−2.1 kn	−22%	−36%	−61%	−32%	2.1 kn slower, fuel per mile down 22%; 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	Chandris Hellas Inc	5,476	17,212	47,122	4,217	11.2	116	7.95	–
2024	Chandris Hellas Inc	5,717	18,011	50,234	4,196	12.0	114	6.73	–
2023	not published	2,396	7,505	22,748	1,802	12.6	105	–	67%
2022	not published	0	0	–	0	–	–	–	–
2021	not published	0	0	–	0	–	–	–	–
2020	not published	5,164	16,280	40,040	3,329	12.0	129	5.55	–
2019	not published	804	2,513	8,007	824	9.7	100	5.31	–
2018	not published	2,653	8,360	20,679	1,746	11.8	128	7.86	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Chandris Hellas Inc	7.95	7.95	+0%	833 of 1,665	DNV	A
2024	Chandris Hellas Inc	6.73	8.06	−17%	618 of 1,787	DNV	A
2023	not published	–	–	–	–	ABS	A
2022	not published	–	–	–	–	ABS	A
2021	not published	–	–	–	–	ABS	A
2020	not published	5.55	9.03	−39%	294 of 1,870	ABS	A
2019	not published	5.31	8.83	−40%	305 of 1,919	ABS	A
2018	not published	7.86	8.86	−11%	710 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.