Navalyze · Oil tanker · Ship

AURORA SPIRIT

IMO: 9837169
Type: Oil tanker
Average cargo carried: 37,471 t
Flag (estimated): Bahamas
Port of registry: Nassau

ISM company (DoC holder) in 2025: Maran Shuttle Tankers Norway AS · part of Maran

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 43,819 t of cargo on average.

Fuel kg/nm

202

Oil tanker median 129 kg/nm (+57%)

CO₂ per transport work (cargo)

13.9

g CO₂/t·nm · Oil tanker median 8.44 (+64%)

Average speed

6.3 kn

Oil tanker median 11.0 kn (−43%)

Fuel per day at sea

30.4 t/day

Fuel consumed

7,367 t

CO₂ emitted

22,166 t

Distance sailed

36,444 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,823 h

243 days, 66% 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 177 kg/nm · median 129 (+38%)

76.1Ranks 1,410 of 1,665, lowest first191

Average speedThis ship 5.8 kn · median 10.7 (−46%)

8.0Faster than 2% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 14.1 g CO₂/t·nm · median 7.95 (+77%)

4.51Ranks 1,265 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 ports47%
From the EU24%
Into the EU19%
At berth in the EU10%

Fuel burned laden

–

Not reported

CO₂ at berth

2,292 t

10.3% 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

AURORA SPIRIT
Oil tanker median

125.0150.0175.0200.0225.0250.0

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

Average speed, kn

AURORA SPIRIT
Oil tanker median

4.06.08.010.012.0

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

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

AURORA SPIRIT
Oil tanker median

5.010.015.020.025.0

’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	+0.8 kn	−21%	−9%	+47%	−35%	0.8 kn faster, fuel per mile down 21%; better than speed alone explains (hull, engine or trade).
2023→2024	−1.3 kn	+11%	−11%	−31%	+56%	1.3 kn slower, fuel per mile up 11%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.3 kn	−1%	+4%	+0%	−8%	Same speed, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	+0.0 kn	+5%	+4%	−13%	+3%	Same speed, fuel per mile up 5%; in line with the speed change.
2020→2021	−0.6 kn	+1%	−8%	+3%	−30%	0.6 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading 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	Maran Shuttle Tankers Norway AS	6,605	19,704	37,267	6,415	5.8	177	14.1	–
2024	Altera Infrastructure Norway AS	5,694	17,346	25,280	5,045	5.0	225	21.7	–
2023	not published	7,367	22,166	36,444	5,823	6.3	202	13.9	–
2022	not published	7,420	23,083	36,369	6,071	6.0	204	15.2	–
2021LNG / alt.	not published	8,127	23,603	41,707	6,907	6.0	195	14.7	–
2020LNG / alt.	not published	7,826	23,021	40,353	6,096	6.6	194	20.9	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Maran Shuttle Tankers Norway AS	14.1	7.95	+77%	1,265 of 1,665	DNV	B+C
2024	Altera Infrastructure Norway AS	21.7	8.06	+169%	1,553 of 1,787	DNV	B+C
2023	not published	13.9	8.44	+64%	1,382 of 1,797	DNV	B+C
2022	not published	15.2	8.51	+78%	1,555 of 1,961	DNV	B+C
2021LNG / alt.	not published	14.7	8.86	+66%	1,358 of 1,789	DNV	B+C
2020LNG / alt.	not published	20.9	9.03	+132%	1,599 of 1,870	DNV	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.