Navalyze · Oil tanker · Ship

ARDENZA

IMO: 9377195
Type: Oil tanker
Average cargo carried: 5,104 t
Flag (estimated): Italy
Port of registry: Livorno
Technical efficiency: EEXI 9.20 g CO₂/t·nm

ISM company (DoC holder) in 2025: DALMARE SPA

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 5,104 t of cargo on average.

Fuel kg/nm

67.1

Oil tanker median 129 kg/nm (−48%)

CO₂ per transport work (cargo)

41.9

g CO₂/t·nm · Oil tanker median 7.95 (+427%)

Average speed

10.0 kn

Oil tanker median 10.7 kn (−7%)

Fuel per day at sea

16.2 t/day

Fuel consumed

2,750 t

CO₂ emitted

8,771 t

8,906 t CO₂eq incl. CH₄ and N₂O

Distance sailed

40,984 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,082 h

170 days, 47% 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 67.1 kg/nm · median 129 (−48%)

76.1Ranks 113 of 1,665, lowest first191

Average speedThis ship 10.0 kn · median 10.7 (−7%)

8.0Faster than 31% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 41.9 g CO₂/t·nm · median 7.95 (+427%)

4.51Ranks 1,580 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 ports81%
From the EU0%
Into the EU0%
At berth in the EU19%

95% of this ship's CO₂ falls under the EU ETS (8,303 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,649 t

18.8% 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

+135 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

ARDENZA
Oil tanker median

60.080.0100.0120.0140.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

ARDENZA
Oil tanker median

6.08.010.012.0

’182018’192019’202020’212021’222022’232023’242024’252025

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

ARDENZA
Oil tanker median

0.020.040.060.0

’182018’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.8 kn	+1%	−6%	+2%	−2%	0.8 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.7 kn	−22%	−16%	+11%	−23%	0.7 kn faster, fuel per mile down 22%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.3 kn	−7%	−10%	−5%	−6%	0.3 kn slower, fuel per mile down 7%; in line with the speed change.
2021→2022	−0.8 kn	+3%	−4%	−0%	+17%	0.8 kn slower, fuel per mile up 3%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.4 kn	+8%	+5%	−5%	+12%	0.4 kn slower, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+5.2 kn	+6%	+90%	+21%	−5%	5.2 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−1.0 kn	−15%	−25%	−25%	−7%	1.0 kn slower, fuel per mile down 15%; 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	DALMARE SPA	2,750	8,771	40,984	4,082	10.0	67.1	41.9	–
2024	DALMARE SPA	2,662	8,411	40,168	3,705	10.8	66.3	42.9	–
2023	not published	3,088	9,707	36,344	3,610	10.1	85.0	55.7	–
2022	not published	3,496	10,976	38,137	3,660	10.4	91.7	59.2	–
2021	not published	3,400	10,688	38,236	3,420	11.2	88.9	50.4	–
2020	not published	3,303	10,383	40,192	3,478	11.6	82.2	44.8	–
2019	not published	2,593	8,140	33,345	5,203	6.4	77.8	47.4	–
2018	not published	4,049	12,680	44,452	6,025	7.4	91.1	51.0	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	DALMARE SPA	41.9	7.95	+427%	1,580 of 1,665	RINA	A
2024	DALMARE SPA	42.9	8.06	+432%	1,721 of 1,787	RINA	A
2023	not published	55.7	8.44	+560%	1,756 of 1,797	RINA	B
2022	not published	59.2	8.51	+596%	1,920 of 1,961	RINA	B
2021	not published	50.4	8.86	+469%	1,730 of 1,789	RINA	B
2020	not published	44.8	9.03	+396%	1,805 of 1,870	RINA	B
2019	not published	47.4	8.83	+436%	1,850 of 1,919	RINA	B
2018	not published	51.0	8.86	+476%	1,726 of 1,779	RINA	B

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.