Navalyze · Oil tanker · Ship

STEN AURORA

IMO: 9318565
Type: Oil tanker
Average cargo carried: 7,494 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 7.49 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: Rederiet Stenersen AS

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 7,494 t of cargo on average.

Fuel kg/nm

66.3

Oil tanker median 129 kg/nm (−48%)

CO₂ per transport work (cargo)

28.3

g CO₂/t·nm · Oil tanker median 7.95 (+256%)

Average speed

10.4 kn

Oil tanker median 10.7 kn (−3%)

Fuel per day at sea

16.6 t/day

Fuel consumed

1,578 t

CO₂ emitted

5,056 t

5,133 t CO₂eq incl. CH₄ and N₂O

Distance sailed

23,804 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,285 h

95 days, 26% 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 66.3 kg/nm · median 129 (−48%)

76.1Ranks 105 of 1,665, lowest first191

Average speedThis ship 10.4 kn · median 10.7 (−3%)

8.0Faster than 41% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 28.3 g CO₂/t·nm · median 7.95 (+256%)

4.51Ranks 1,507 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 ports52%
From the EU13%
Into the EU23%
At berth in the EU13%

82% of this ship's CO₂ falls under the EU ETS (4,159 t).

Fuel burned laden

–

Not reported

CO₂ at berth

655 t

13.0% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+77 t

+1.5% 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

STEN AURORA
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

STEN AURORA
Oil tanker median

6.08.010.012.0

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

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

STEN AURORA
Oil tanker median

0.010.020.030.040.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.2 kn	−1%	+2%	+25%	+21%	Same speed, fuel per mile flat.
2023→2024	+0.1 kn	−2%	−1%	−52%	−37%	Same speed, fuel per mile flat.
2022→2023	+0.6 kn	−4%	+1%	+49%	+37%	0.6 kn faster, fuel per mile down 4%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.7 kn	+13%	+23%	−30%	+45%	0.7 kn faster, fuel per mile up 13%; in line with the speed change.
2020→2021	+0.0 kn	−7%	−7%	−11%	−19%	Same speed, fuel per mile down 7%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.4 kn	+7%	+27%	−5%	−18%	1.4 kn faster, fuel per mile up 7%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.0 kn	−2%	+13%	+11%	+36%	1.0 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).

Part-year reports are left out of these comparisons. 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	Rederiet Stenersen AS	1,578	5,056	23,804	2,285	10.4	66.3	28.3	–
2024part-year	Rederiet Stenersen AS	1,273	4,074	19,076	1,874	10.2	66.7	23.5	–
2024	Rederiet Stenersen AS	1,273	4,074	19,076	1,874	10.2	66.7	23.5	–
2023	not published	2,689	8,606	39,641	3,930	10.1	67.8	37.2	–
2022	not published	1,877	6,019	26,516	2,786	9.5	70.8	27.2	–
2021	not published	2,386	7,650	38,023	4,342	8.8	62.8	18.7	–
2020	not published	2,889	9,263	42,791	4,887	8.8	67.5	23.1	–
2019	not published	2,850	9,136	45,100	6,129	7.4	63.2	28.1	–
2018	not published	2,603	8,333	40,465	6,315	6.4	64.3	20.7	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Rederiet Stenersen AS	28.3	7.95	+256%	1,507 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	23.5	8.06	+191%	1,574 of 1,787	DNV	–
2023	not published	37.2	8.44	+341%	1,702 of 1,797	DNV	B+C
2022	not published	27.2	8.51	+219%	1,794 of 1,961	DNV	A
2021	not published	18.7	8.86	+111%	1,496 of 1,789	DNV	A
2020	not published	23.1	9.03	+156%	1,636 of 1,870	DNV	A
2019	not published	28.1	8.83	+218%	1,769 of 1,919	DNV	A
2018	not published	20.7	8.86	+133%	1,544 of 1,779	DNV	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.