Navalyze · Oil tanker · Ship

CASTILLO DE ARTEAGA

IMO: 9871012
Type: Oil tanker
Average cargo carried: 16,142 t
Port of registry: Valletta
Technical efficiency: EEDI 4.78 g CO₂/t·nm

ISM company (DoC holder) in 2025: Empresa Naviera Elcano, S.A. · part of Elcano

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 16,142 t of cargo on average.

Fuel per mile

121.9 kg/nm

Oil tanker median 128.5 kg/nm (−5%)

CO₂ per transport work (cargo)

23.54

g CO₂/t·nm · Oil tanker median 7.95 (+196%)

Average speed

10.6 kn

Oil tanker median 10.7 kn (−1%)

Fuel per day at sea

31.1 t/day

Fuel consumed

4,369 t

CO₂ emitted

13,617 t

13,831 t CO₂eq incl. CH₄ and N₂O

Distance sailed

35,834 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,374 h

141 days, 39% 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 per mileThis ship 121.9 kg/nm · median 128.5 (−5%)

76.1Ranks 708 of 1,665, lowest first190.8

Average speedThis ship 10.6 kn · median 10.7 (−1%)

8.0Faster than 47% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 23.54 g CO₂/t·nm · median 7.95 (+196%)

4.51Ranks 1,452 of 1,665, lowest first27.66

Middle 80% of shipsMiddle 50%Oil tanker 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 ports66%
From the EU1%
Into the EU4%
At berth in the EU29%

87% of this ship's CO₂ falls under the EU ETS (11,811 t).

Fuel burned laden

–

Not reported

CO₂ at berth

28.8%

Alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift 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 per mile, kg/nm

CASTILLO DE ARTEAGA
Oil tanker median

80.0100.0120.0140.0160.0

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

Average speed, kn

CASTILLO DE ARTEAGA
Oil tanker median

4.06.08.010.012.014.0

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

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

CASTILLO DE ARTEAGA
Oil tanker median

5.010.015.020.025.030.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+0.9 kn	−6%	+3%	+6%	−13%	0.9 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.4 kn	+2%	−2%	+7%	+0%	0.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+4.4 kn	−11%	+58%	+15%	−0%	4.4 kn faster, fuel per mile down 11%; better than speed alone explains (hull, engine or trade).
2021→2022	−6.6 kn	+22%	−43%	−33%	+6%	6.6 kn slower, fuel per mile up 22%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.0 kn	−1%	−9%	+18%	−4%	1.0 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.1 kn	+18%	+18%	+172%	+94%	Same speed, fuel per mile up 18%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Empresa Naviera Elcano, S.A.	4,369	13,617	35,834	3,374	10.6	121.9	23.54	–
2024	Empresa Naviera Elcano, S.A.	4,376	13,641	33,839	3,486	9.7	129.3	27.03	–
2023	not published	4,019	12,542	31,582	3,130	10.1	127.2	26.99	–
2022	not published	3,900	12,149	27,387	4,790	5.7	142.4	27.01	–
2021	not published	4,770	14,866	40,926	3,324	12.3	116.5	25.53	–
2020	not published	4,102	12,775	34,822	2,617	13.3	117.8	26.48	–
2019	not published	1,275	3,991	12,805	956	13.4	99.6	13.67	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Empresa Naviera Elcano, S.A.	23.54	7.95	+196%	1,452 of 1,665	Lloyd's Register	B
2024	Empresa Naviera Elcano, S.A.	27.03	8.06	+235%	1,626 of 1,787	Lloyd's Register	B
2023	not published	26.99	8.44	+220%	1,630 of 1,797	Lloyd's Register	B
2022	not published	27.01	8.51	+217%	1,792 of 1,961	Lloyd's Register	B
2021	not published	25.53	8.86	+188%	1,617 of 1,789	Lloyd's Register	B
2020	not published	26.48	9.03	+193%	1,689 of 1,870	Bureau Veritas	B
2019	not published	13.67	8.83	+55%	1,439 of 1,919	Bureau Veritas	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.