Navalyze · Oil tanker · Ship

STEN MOSTER

IMO: 9341184
Type: Oil tanker
Average cargo carried: 9,128 t
Flag (estimated): Norway
Port of registry: Bergen
Technical efficiency: EEXI 7.41 g CO₂/t·nm
Ice class: IA

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

Report year

2019 at a glance

From the 2019 THETIS-MRV report. Carries about 7,833 t of cargo on average.

Fuel kg/nm

64.2

Oil tanker median 138 kg/nm (−53%)

CO₂ per transport work (cargo)

26.2

g CO₂/t·nm · Oil tanker median 8.83 (+197%)

Average speed

6.5 kn

Oil tanker median 9.7 kn (−33%)

Fuel per day at sea

10.0 t/day

Fuel consumed

2,681 t

CO₂ emitted

8,578 t

Distance sailed

41,767 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,421 h

268 days, 73% 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 76.4 kg/nm · median 129 (−41%)

76.1Ranks 173 of 1,665, lowest first191

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

8.0Faster than 39% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 26.8 g CO₂/t·nm · median 7.95 (+237%)

4.51Ranks 1,489 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2019

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 ports48%
From the EU17%
Into the EU23%
At berth in the EU12%

Fuel burned laden

–

Not reported

CO₂ at berth

1,029 t

12.0% 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

STEN MOSTER
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

STEN MOSTER
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 MOSTER
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	−0.2 kn	+1%	−1%	−17%	−6%	Same speed, fuel per mile flat.
2023→2024	+0.5 kn	−0%	+4%	−4%	−0%	0.5 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2022→2023	+0.0 kn	+8%	+8%	−12%	+0%	Same speed, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.1 kn	+6%	+4%	+29%	+0%	Same speed, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.0 kn	+6%	+7%	−43%	+45%	Same speed, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+3.7 kn	−2%	+53%	+21%	−25%	3.7 kn faster, fuel per mile down 2%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.3 kn	−2%	−7%	+166%	−11%	Same speed, fuel per mile down 2%; worse than speed alone explains (fouling, weather, loading 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	1,983	6,359	25,973	2,507	10.4	76.4	26.8	–
2024part-year	Rederiet Stenersen AS	2,270	7,278	29,825	2,829	10.5	76.1	28.1	–
2024	Rederiet Stenersen AS	2,375	7,614	31,353	2,963	10.6	75.8	28.4	–
2023	not published	2,477	7,931	32,555	3,232	10.1	76.1	28.5	–
2022	not published	2,603	8,341	37,006	3,676	10.1	70.3	28.4	–
2021	not published	1,902	6,097	28,589	2,800	10.2	66.5	28.4	–
2020	not published	3,169	10,140	50,400	4,962	10.2	62.9	19.6	–
2019	not published	2,681	8,578	41,767	6,421	6.5	64.2	26.2	–
2018	not published	1,034	3,298	15,716	2,324	6.8	65.8	29.6	–

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	26.8	7.95	+237%	1,489 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	28.4	8.06	+253%	1,640 of 1,787	DNV	–
2023	not published	28.5	8.44	+238%	1,646 of 1,797	DNV	B+C
2022	not published	28.4	8.51	+234%	1,806 of 1,961	DNV	A
2021	not published	28.4	8.86	+221%	1,641 of 1,789	DNV	A
2020	not published	19.6	9.03	+117%	1,576 of 1,870	DNV	A
2019	not published	26.2	8.83	+197%	1,739 of 1,919	DNV	A
2018	not published	29.6	8.86	+234%	1,660 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.