Navalyze · Vehicle carrier · Ship

DEMETER LEADER

IMO: 9477921
Type: Vehicle carrier
Average cargo carried: 6,376 t
Flag (estimated): Japan
Port of registry: Kaminoseki-Cho
Technical efficiency: EEXI 14.50 g CO₂/t·nm

ISM company (DoC holder) in 2025: Toko Unyu Co Ltd

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 5,630 t of cargo on average.

Fuel kg/nm

107

Vehicle carrier median 103 kg/nm (+4%)

CO₂ per transport work (cargo)

59.3

g CO₂/t·nm · Vehicle carrier median 56.6 (+5%)

Average speed

14.3 kn

Vehicle carrier median 14.5 kn (−1%)

Fuel per day at sea

36.6 t/day

Fuel consumed

1,470 t

CO₂ emitted

4,606 t

Distance sailed

13,792 nm

CO₂ ÷ CO₂ per mile

Time at sea

964 h

40 days, 11% 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 kg/nmThis ship 104 kg/nm · median 99.9 (+4%)

79.6Ranks 321 of 506, lowest first119

Average speedThis ship 13.7 kn · median 14.4 (−5%)

12.0Faster than 35% of vehicle carrier ships15.9

CO₂ per transport work (cargo)This ship 50.8 g CO₂/t·nm · median 55.4 (−8%)

34.7Ranks 213 of 506, lowest first158

Middle 80% of shipsMiddle 50%Vehicle carrier 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 ports8%
From the EU20%
Into the EU68%
At berth in the EU5%

Fuel burned laden

1,402 t

95% of all fuel; 5% in ballast or unladen

CO₂ at berth

216 t

4.7% 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 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 kg/nm

DEMETER LEADER
Vehicle carrier median

90.095.0100.0105.0110.0

’182018’192019’202020’232023’242024’252025

Average speed, kn

DEMETER LEADER
Vehicle carrier median

11.012.013.014.015.0

’182018’192019’202020’232023’242024’252025

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

DEMETER LEADER
Vehicle carrier median

40.050.060.070.080.0

’192019’202020’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+1.9 kn	+14%	+33%	+399%	+19%	1.9 kn faster, fuel per mile up 14%; better than speed alone explains (hull, engine or trade).
2023→2024	−2.5 kn	−14%	−30%	−66%	−28%	2.5 kn slower, fuel per mile down 14%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2023	+2.1 kn	+6%	+25%	−68%	+32%	2.1 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2019→2020	−1.6 kn	+10%	−3%	+10%	−36%	1.6 kn slower, fuel per mile up 10%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	–	–	–	–	–

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	Toko Unyu Co Ltd	2,425	7,534	23,273	1,701	13.7	104	50.8	–
2024	Toko Unyu Co Ltd	426	1,345	4,666	396	11.8	91.2	42.7	85%
2023	not published	1,470	4,606	13,792	964	14.3	107	59.3	95%
2020	not published	4,328	13,539	43,190	3,544	12.2	100	44.9	–
2019	not published	3,586	11,199	39,357	2,853	13.8	91.1	70.7	–
2018	not published	0	0	–	0	–	–	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Vehicle carrier median	vs Vehicle carrier	Rank	Verifier	Methods
2025	Toko Unyu Co Ltd	50.8	55.4	−8%	213 of 506	Verifavia	A+C
2024	Toko Unyu Co Ltd	42.7	55.3	−23%	74 of 335	ABS	A
2023	not published	59.3	56.6	+5%	225 of 417	ABS	–
2020	not published	44.9	57.3	−22%	92 of 449	Verifavia	A
2019	not published	70.7	59.0	+20%	294 of 426	Verifavia	A
2018	not published	–	–	–	–	Verifavia	A

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.