Navalyze · Oil tanker · Ship

STEN ARNOLD

IMO: 9371610
Type: Oil tanker
Average cargo carried: 8,255 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 7.43 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 7,540 t of cargo on average.

Fuel kg/nm

63.1

Oil tanker median 138 kg/nm (−54%)

CO₂ per transport work (cargo)

26.8

g CO₂/t·nm · Oil tanker median 8.83 (+203%)

Average speed

7.2 kn

Oil tanker median 9.7 kn (−26%)

Fuel per day at sea

10.9 t/day

Fuel consumed

2,795 t

CO₂ emitted

8,949 t

Distance sailed

44,304 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,150 h

256 days, 70% 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 74.0 kg/nm · median 129 (−42%)

76.1Ranks 152 of 1,665, lowest first191

Average speedThis ship 9.6 kn · median 10.7 (−10%)

8.0Faster than 24% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 28.7 g CO₂/t·nm · median 7.95 (+261%)

4.51Ranks 1,510 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 ports61%
From the EU13%
Into the EU12%
At berth in the EU13%

Fuel burned laden

–

Not reported

CO₂ at berth

1,177 t

13.2% 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 ARNOLD
Oil tanker median

50.075.0100.0125.0150.0

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

Average speed, kn

STEN ARNOLD
Oil tanker median

7.08.09.010.011.0

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

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

STEN ARNOLD
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	−0.6 kn	−2%	−8%	−0%	+13%	0.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.3 kn	+7%	+5%	−6%	+1%	0.3 kn slower, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+2.2 kn	−3%	+22%	+1%	−10%	2.2 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2021→2022	−2.2 kn	+12%	−12%	−11%	+2%	2.2 kn slower, fuel per mile up 12%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.8 kn	−3%	+6%	−10%	+10%	0.8 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2019→2020	+2.5 kn	+6%	+43%	+1%	−6%	2.5 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.2 kn	+12%	+9%	−7%	+32%	Same speed, fuel per mile up 12%; 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	2,531	8,107	34,182	3,569	9.6	74.0	28.7	–
2024part-year	Rederiet Stenersen AS	2,488	7,977	33,170	3,246	10.2	75.0	25.3	–
2024	Rederiet Stenersen AS	2,578	8,266	34,233	3,348	10.2	75.3	25.5	–
2023	not published	2,555	8,187	36,258	3,455	10.5	70.5	25.3	–
2022	not published	2,621	8,404	35,968	4,342	8.3	72.9	28.1	–
2021	not published	2,629	8,429	40,444	3,836	10.5	65.0	27.7	–
2020	not published	2,996	9,605	44,714	4,612	9.7	67.0	25.3	–
2019	not published	2,795	8,949	44,304	6,150	7.2	63.1	26.8	–
2018	not published	2,686	8,598	47,733	6,442	7.4	56.3	20.4	–

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	28.7	7.95	+261%	1,510 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	25.5	8.06	+216%	1,605 of 1,787	DNV	–
2023	not published	25.3	8.44	+199%	1,614 of 1,797	DNV	B+C
2022	not published	28.1	8.51	+230%	1,800 of 1,961	DNV	A
2021	not published	27.7	8.86	+213%	1,635 of 1,789	DNV	A
2020	not published	25.3	9.03	+180%	1,666 of 1,870	DNV	–
2019	not published	26.8	8.83	+203%	1,748 of 1,919	DNV	A
2018	not published	20.4	8.86	+130%	1,539 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.