Navalyze · Oil tanker · Ship

ASTREA

IMO: 9488839
Type: Oil tanker
Average cargo carried: 5,160 t
Flag (estimated): Sweden
Port of registry: DonsÖ
Technical efficiency: EEXI 9.77 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: Rederi AB Veritas Tankers

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 5,186 t of cargo on average.

Fuel kg/nm

44.8

Oil tanker median 129 kg/nm (−65%)

CO₂ per transport work (cargo)

27.3

g CO₂/t·nm · Oil tanker median 8.44 (+224%)

Average speed

10.6 kn

Oil tanker median 11.0 kn (−4%)

Fuel per day at sea

11.4 t/day

Fuel consumed

2,376 t

CO₂ emitted

7,515 t

Distance sailed

53,048 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,992 h

208 days, 57% 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 48.1 kg/nm · median 129 (−63%)

76.1Ranks 28 of 1,665, lowest first191

Average speedThis ship 9.7 kn · median 10.7 (−9%)

8.0Faster than 26% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 29.8 g CO₂/t·nm · median 7.95 (+275%)

4.51Ranks 1,515 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2023

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 ports87%
From the EU1%
Into the EU1%
At berth in the EU10%

Fuel burned laden

–

Not reported

CO₂ at berth

767 t

10.2% 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

ASTREA
Oil tanker median

25.050.075.0100.0125.0150.0

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

Average speed, kn

ASTREA
Oil tanker median

7.08.09.010.011.0

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

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

ASTREA
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	+6%	−1%	−17%	+9%	0.7 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.2 kn	+1%	−1%	−16%	+0%	Same speed, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.2 kn	+6%	+19%	+11%	+3%	1.2 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2021→2022	−0.9 kn	−8%	−16%	+9%	−8%	0.9 kn slower, fuel per mile down 8%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.7 kn	−8%	−2%	+3%	−8%	0.7 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2019→2020	+2.4 kn	−3%	+30%	−7%	−12%	2.4 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).

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	Rederi AB Veritas Tankers	1,780	5,689	36,997	3,810	9.7	48.1	29.8	–
2024	Rederi AB Veritas Tankers	2,033	6,494	44,766	4,319	10.4	45.4	27.4	–
2023	not published	2,376	7,515	53,048	4,992	10.6	44.8	27.3	–
2022	not published	2,021	6,395	47,673	5,062	9.4	42.4	26.6	–
2021	not published	2,011	6,365	43,637	4,235	10.3	46.1	29.0	–
2020	not published	2,131	6,742	42,501	4,414	9.6	50.1	31.5	–
2019	not published	2,356	7,455	45,756	6,321	7.2	51.5	36.0	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Rederi AB Veritas Tankers	29.8	7.95	+275%	1,515 of 1,665	DNV	B+C
2024	Rederi AB Veritas Tankers	27.4	8.06	+240%	1,630 of 1,787	DNV	B+C
2023	not published	27.3	8.44	+224%	1,633 of 1,797	DNV	B+C
2022	not published	26.6	8.51	+213%	1,783 of 1,961	DNV	B+C
2021	not published	29.0	8.86	+227%	1,644 of 1,789	DNV	B+C
2020	not published	31.5	9.03	+249%	1,743 of 1,870	DNV	C
2019	not published	36.0	8.83	+307%	1,819 of 1,919	DNV	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.