Navalyze · Oil tanker · Ship

STEN BOTHNIA

IMO: 9378735
Type: Oil tanker
Average cargo carried: 7,414 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 7.42 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 7,414 t of cargo on average.

Fuel kg/nm

64.0

Oil tanker median 129 kg/nm (−50%)

CO₂ per transport work (cargo)

27.7

g CO₂/t·nm · Oil tanker median 7.95 (+248%)

Average speed

10.1 kn

Oil tanker median 10.7 kn (−6%)

Fuel per day at sea

15.6 t/day

Fuel consumed

2,395 t

CO₂ emitted

7,667 t

7,785 t CO₂eq incl. CH₄ and N₂O

Distance sailed

37,398 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,687 h

154 days, 42% 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 64.0 kg/nm · median 129 (−50%)

76.1Ranks 93 of 1,665, lowest first191

Average speedThis ship 10.1 kn · median 10.7 (−6%)

8.0Faster than 33% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 27.7 g CO₂/t·nm · median 7.95 (+248%)

4.51Ranks 1,499 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 ports49%
From the EU23%
Into the EU16%
At berth in the EU13%

81% of this ship's CO₂ falls under the EU ETS (6,196 t).

Fuel burned laden

–

Not reported

CO₂ at berth

997 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

+118 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 BOTHNIA
Oil tanker median

50.075.0100.0125.0150.0

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

Average speed, kn

STEN BOTHNIA
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 BOTHNIA
Oil tanker median

0.010.020.030.0

’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	+0.0 kn	−0%	+0%	+15%	+28%	Same speed, fuel per mile flat.
2023→2024	−0.2 kn	+16%	+15%	−30%	−7%	Same speed, fuel per mile up 16%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	−0.2 kn	−3%	−6%	−8%	−4%	Same speed, fuel per mile down 3%; in line with the speed change.
2021→2022	+0.6 kn	−4%	+2%	+11%	+2%	0.6 kn faster, fuel per mile down 4%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.6 kn	−5%	−10%	−4%	−14%	0.6 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+3.3 kn	−12%	+29%	+8%	+5%	3.3 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.8 kn	+11%	+26%	+4%	+6%	0.8 kn faster, fuel per mile up 11%; 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	2,395	7,667	37,398	3,687	10.1	64.0	27.7	–
2024part-year	Rederiet Stenersen AS	1,927	6,165	29,621	2,950	10.0	65.0	22.9	–
2024	Rederiet Stenersen AS	2,087	6,677	32,434	3,210	10.1	64.3	21.7	–
2023	not published	2,559	8,205	46,315	4,515	10.3	55.3	23.4	–
2022	not published	2,858	9,164	50,335	4,774	10.5	56.8	24.4	–
2021	not published	2,686	8,611	45,193	4,582	9.9	59.4	24.1	–
2020	not published	2,944	9,438	47,219	4,507	10.5	62.3	28.1	–
2019	not published	3,112	9,978	43,864	6,110	7.2	71.0	26.8	–
2018	not published	2,694	8,636	42,173	6,636	6.4	63.9	25.1	–

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	27.7	7.95	+248%	1,499 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	21.7	8.06	+169%	1,551 of 1,787	DNV	–
2023	not published	23.4	8.44	+177%	1,596 of 1,797	DNV	A
2022	not published	24.4	8.51	+187%	1,757 of 1,961	DNV	A
2021	not published	24.1	8.86	+172%	1,589 of 1,789	DNV	A
2020	not published	28.1	9.03	+211%	1,709 of 1,870	DNV	A
2019	not published	26.8	8.83	+203%	1,746 of 1,919	DNV	A
2018	not published	25.1	8.86	+184%	1,617 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.