Navalyze · Vehicle carrier · Ship

SIEM ARISTOTLE

IMO: 9841029
Type: Vehicle carrier
Average cargo carried: 4,111 t
Port of registry: Monrovia
Technical efficiency: EEXI 12.78 g CO₂/t·nm
Fuel: Mostly LNG

ISM company (DoC holder) in 2025: SIEM Ship Management · part of Siem

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 4,111 t of cargo on average.

Fuel per mile

91.2 kg/nm

Vehicle carrier median 99.9 kg/nm (−9%)

CO₂ per transport work (cargo)

63.07

g CO₂/t·nm · Vehicle carrier median 55.36 (+14%)

Average speed

14.6 kn

Vehicle carrier median 14.4 kn (+1%)

Fuel per day at sea

32.0 t/day

Fuel consumed

5,038 t

CO₂ emitted

14,324 t

15,294 t CO₂eq incl. CH₄ and N₂O

Distance sailed

55,252 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,776 h

157 days, 43% of the year

Within the vehicle carrier fleet, 2025

Set against all 506 vehicle carrier 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 per mileThis ship 91.2 kg/nm · median 99.9 (−9%)

79.6Ranks 129 of 506, lowest first119.0

Average speedThis ship 14.6 kn · median 14.4 (+1%)

12.0Faster than 57% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 63.07 g CO₂/t·nm · median 55.36 (+14%)

34.70Ranks 295 of 506, lowest first158.48

Middle 80% of shipsMiddle 50%Vehicle carrier medianThis ship

Where the emissions happen, 2025

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 ports7%
From the EU44%
Into the EU48%
At berth in the EU2%

54% of this ship's CO₂ falls under the EU ETS (7,796 t).

Fuel burned laden

–

Not reported

CO₂ at berth

2.3%

Alongside in EU ports

Methane (CH₄)

28.6 t

LNG engines slip unburnt methane

CO₂eq ÷ CO₂

1.068

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

Full-year reports only. The Vehicle carrier median is the middle ship of all vehicle carrier ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel per mile, kg/nm

SIEM ARISTOTLE
Vehicle carrier median

85.090.095.0100.0105.0110.0

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

Average speed, kn

SIEM ARISTOTLE
Vehicle carrier median

13.513.814.014.314.514.8

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

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

SIEM ARISTOTLE
Vehicle carrier median

30.040.050.060.070.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+0.2 kn	+4%	+5%	+8%	+32%	Same speed, fuel per mile up 4%; in line with the speed change.
2023→2024	−0.2 kn	−1%	−2%	+5%	+18%	Same speed, fuel per mile flat.
2022→2023	+0.5 kn	−3%	+0%	−9%	+3%	0.5 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.5 kn	−3%	+1%	+23%	−14%	0.5 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.1 kn	−11%	−11%	+168%	−1%	Same speed, fuel per mile down 11%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025LNG	SIEM Ship Management	5,038	14,324	55,252	3,776	14.6	91.2	63.07	–
2024LNG	SIEM Ship Management	4,511	12,585	51,242	3,551	14.4	88.0	47.94	–
2023LNG	not published	4,343	12,190	48,964	3,351	14.6	88.7	40.55	–
2022LNG	not published	4,954	14,221	54,096	3,838	14.1	91.6	39.33	–
2021LNG	not published	4,155	11,903	44,008	3,235	13.6	94.4	45.63	–
2020LNG	not published	1,733	5,046	16,436	1,204	13.7	105.5	46.13	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2025LNG	SIEM Ship Management	63.07	55.36	+14%	295 of 506	DNV	C
2024LNG	SIEM Ship Management	47.94	55.31	−13%	118 of 335	DNV	C
2023LNG	not published	40.55	56.64	−28%	51 of 417	DNV	C
2022LNG	not published	39.33	57.66	−32%	40 of 463	DNV	C
2021LNG	not published	45.63	59.57	−23%	85 of 459	DNV	C
2020LNG	not published	46.13	57.26	−19%	103 of 449	DNV	C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Vehicle carrier 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 vehicle carrier 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.