Navalyze · Oil tanker · Ship

STEN NEPTUN

IMO: 9322712
Type: Oil tanker
Average cargo carried: 8,779 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 8.21 g CO₂/t·nm
Ice class: IA
Former names: BRO NORDBY

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

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 8,779 t of cargo on average.

Fuel kg/nm

65.5

Oil tanker median 129 kg/nm (−49%)

CO₂ per transport work (cargo)

23.9

g CO₂/t·nm · Oil tanker median 7.95 (+201%)

Average speed

10.3 kn

Oil tanker median 10.7 kn (−4%)

Fuel per day at sea

16.1 t/day

Fuel consumed

2,801 t

CO₂ emitted

8,981 t

9,119 t CO₂eq incl. CH₄ and N₂O

Distance sailed

42,770 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,167 h

174 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 65.5 kg/nm · median 129 (−49%)

76.1Ranks 103 of 1,665, lowest first191

Average speedThis ship 10.3 kn · median 10.7 (−4%)

8.0Faster than 37% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 23.9 g CO₂/t·nm · median 7.95 (+201%)

4.51Ranks 1,459 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 ports79%
From the EU0%
Into the EU2%
At berth in the EU18%

99% of this ship's CO₂ falls under the EU ETS (8,860 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,621 t

18.1% 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

+138 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 NEPTUN
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

STEN NEPTUN
Oil tanker median

9.510.010.511.011.5

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

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

STEN NEPTUN
Oil tanker median

0.010.020.030.040.0

’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	+0.7 kn	−14%	−8%	+29%	−24%	0.7 kn faster, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.0 kn	+4%	+4%	+14%	+2%	Same speed, fuel per mile up 4%; in line with the speed change.
2022→2023	−0.6 kn	+6%	−1%	−10%	+2%	0.6 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−1.1 kn	+5%	−6%	−22%	+23%	1.1 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.3 kn	+0%	+3%	−4%	−1%	0.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2019→2020	−0.4 kn	−2%	−5%	+28%	−8%	0.4 kn slower, fuel per mile flat.

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	2,801	8,981	42,770	4,167	10.3	65.5	23.9	–
2024part-year	Rederiet Stenersen AS	2,420	7,756	31,878	3,313	9.6	75.9	31.6	–
2024	Rederiet Stenersen AS	2,512	8,052	33,072	3,435	9.6	76.0	31.6	–
2023	not published	2,132	6,829	29,133	3,036	9.6	73.2	30.9	–
2022	not published	2,254	7,183	32,520	3,173	10.2	69.3	30.3	49%
2021	not published	2,753	8,825	41,574	3,668	11.3	66.2	24.7	–
2020	not published	2,865	9,134	43,266	3,930	11.0	66.2	24.8	–
2019	not published	2,280	7,143	33,763	2,965	11.4	67.5	27.1	–

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	23.9	7.95	+201%	1,459 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	31.6	8.06	+292%	1,669 of 1,787	DNV	–
2023	not published	30.9	8.44	+266%	1,666 of 1,797	DNV	B+C
2022	not published	30.3	8.51	+257%	1,828 of 1,961	ABS	B+C
2021	not published	24.7	8.86	+178%	1,599 of 1,789	ABS	B+C
2020	not published	24.8	9.03	+175%	1,659 of 1,870	ABS	B+C
2019	not published	27.1	8.83	+207%	1,756 of 1,919	ABS	B+C

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.