Navalyze · Oil tanker · Ship

MONTESPERANZA

IMO: 9585871
Type: Oil tanker
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEDI 2.69 g CO₂/t·nm

ISM company (DoC holder) in 2025: Ibaizabal Tankers SL

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel kg/nm

120

CO₂ per transport work (cargo)

–

g CO₂/t·nm

Average speed

6.1 kn

Fuel per day at sea

17.6 t/day

Fuel consumed

584 t

CO₂ emitted

1,825 t

1,854 t CO₂eq incl. CH₄ and N₂O

Distance sailed

4,871 nm

CO₂ ÷ CO₂ per mile

Time at sea

794 h

33 days, 9% of the year

Within the oil tanker fleet, 2024

Set against all 1,787 oil tanker ships with a full-year 2024 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 153 kg/nm · median 129 (+19%)

79.5Ranks 1,297 of 1,787, lowest first194

Average speedThis ship 9.7 kn · median 10.9 (−11%)

8.1Faster than 24% of oil tanker ships12.3

CO₂ per transport work (cargo)This ship 8.10 g CO₂/t·nm · median 8.06 (+0%)

4.44Ranks 901 of 1,787, lowest first25.7

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 ports0%
From the EU100%
Into the EU0%
At berth in the EU0%

50% of this ship's CO₂ falls under the EU ETS (913 t).

Fuel burned laden

–

Not reported

CO₂ at berth

0 t

0.0% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+29 t

+1.6% 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

MONTESPERANZA
Oil tanker median

110.0120.0130.0140.0150.0160.0

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

Average speed, kn

MONTESPERANZA
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

MONTESPERANZA
Oil tanker median

0.02.55.07.510.0

’182018’192019’202020’242024

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−3.6 kn	−22%	−51%	−86%	–	3.6 kn slower, fuel per mile down 22%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.9 kn	+5%	+16%	−8%	–	0.9 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.9 kn	−6%	+5%	+9%	–	0.9 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.5 kn	+13%	−5%	+20%	–	1.5 kn slower, fuel per mile up 13%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.7 kn	+2%	−13%	+109%	–	1.7 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.1 kn	−10%	+0%	−64%	−83%	1.1 kn faster, fuel per mile down 10%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.6 kn	+13%	+7%	−8%	+1,098%	0.6 kn slower, fuel per mile up 13%; 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	Ibaizabal Tankers SL	584	1,825	4,871	794	6.1	120	–	–
2024	Ibaizabal Tankers SL	5,251	16,410	34,294	3,531	9.7	153	8.10	–
2023	not published	5,404	16,963	37,101	4,215	8.8	146	0.51	46%
2022	not published	5,271	16,516	33,949	4,311	7.9	155	0.59	56%
2021	not published	3,871	12,120	28,263	2,996	9.4	137	0.69	43%
2020	not published	1,815	5,695	13,518	1,221	11.1	134	1.24	41%
2019	not published	5,579	17,494	37,537	3,759	10.0	149	7.19	56%
2018	not published	5,376	16,804	40,884	3,874	10.6	132	0.60	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Ibaizabal Tankers SL	–	–	–	–	Lloyd's Register	A
2024	Ibaizabal Tankers SL	8.10	8.06	+0%	901 of 1,787	Lloyd's Register	A
2023	not published	–	–	–	–	Lloyd's Register	A
2022	not published	–	–	–	–	Lloyd's Register	A
2021	not published	–	–	–	–	Lloyd's Register	A
2020	not published	1.24	9.03	−86%	21 of 1,870	Lloyd's Register	A
2019	not published	7.19	8.83	−19%	652 of 1,919	Lloyd's Register	–
2018	not published	0.60	8.86	−93%	18 of 1,779	Lloyd's Register	–

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.