Navalyze · Oil tanker · Ship

SAN MARCOS

IMO: 9425540
Type: Oil tanker
Average cargo carried: 16,674 t
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEXI 4.84 g CO₂/t·nm
Former names: MARIPOSA, ENDLESS SUMMER

ISM company (DoC holder) in 2025: GESTIONI ARMATORIALI SRL

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 16,674 t of cargo on average.

Fuel kg/nm

147

Oil tanker median 129 kg/nm (+14%)

CO₂ per transport work (cargo)

28.0

g CO₂/t·nm · Oil tanker median 7.95 (+253%)

Average speed

11.2 kn

Oil tanker median 10.7 kn (+5%)

Fuel per day at sea

39.4 t/day

Fuel consumed

5,025 t

CO₂ emitted

15,998 t

16,245 t CO₂eq incl. CH₄ and N₂O

Distance sailed

34,229 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,060 h

128 days, 35% 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 147 kg/nm · median 129 (+14%)

76.1Ranks 1,122 of 1,665, lowest first191

Average speedThis ship 11.2 kn · median 10.7 (+5%)

8.0Faster than 65% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 28.0 g CO₂/t·nm · median 7.95 (+253%)

4.51Ranks 1,502 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 ports60%
From the EU7%
Into the EU10%
At berth in the EU24%

80% of this ship's CO₂ falls under the EU ETS (12,841 t).

Fuel burned laden

–

Not reported

CO₂ at berth

3,817 t

23.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+247 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

SAN MARCOS
Oil tanker median

60.080.0100.0120.0140.0160.0

’182018’202020’212021’222022’242024’252025

Average speed, kn

SAN MARCOS
Oil tanker median

6.08.010.012.014.0

’182018’202020’212021’222022’242024’252025

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

SAN MARCOS
Oil tanker median

0.010.020.030.0

’182018’202020’212021’222022’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−1.0 kn	+56%	+43%	+85%	+189%	1.0 kn slower, fuel per mile up 56%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2024	−0.8 kn	+20%	+13%	+120%	−26%	0.8 kn slower, fuel per mile up 20%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+1.0 kn	−17%	−10%	−20%	−24%	1.0 kn faster, fuel per mile down 17%; better than speed alone explains (hull, engine or trade).
2020→2021	+1.6 kn	−12%	+1%	+139%	+59%	1.6 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2018→2020	+3.1 kn	+2%	+45%	−86%	−25%	3.1 kn faster, fuel per mile up 2%; better than speed alone explains (hull, engine or trade).

Part-year reports are left out of these comparisons. 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	GESTIONI ARMATORIALI SRL	5,025	15,998	34,229	3,060	11.2	147	28.0	–
2024part-year	Prime Tanker Management Inc	1,507	4,752	16,111	1,330	12.1	93.5	8.70	–
2024	GESTIONI ARMATORIALI SRL	1,745	5,511	18,493	1,517	12.2	94.3	9.69	–
2022	not published	661	2,067	8,393	648	13.0	78.7	13.1	53%
2021	not published	991	3,106	10,458	873	12.0	94.8	17.3	35%
2020	not published	471	1,476	4,368	420	10.4	108	10.9	–
2018	not published	3,302	10,372	31,359	4,288	7.3	105	14.6	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	GESTIONI ARMATORIALI SRL	28.0	7.95	+253%	1,502 of 1,665	RINA	A
2024part-year	Prime Tanker Management Inc	–	–	–	–	ABS	B+C
2024	GESTIONI ARMATORIALI SRL	9.69	16.7	−42%	224 of 1,274	RINA	A
2022	not published	13.1	16.1	−18%	485 of 1,409	ABS	B+C
2021	not published	17.3	16.7	+4%	716 of 1,343	ABS	B+C
2020	not published	10.9	16.2	−33%	239 of 1,312	ABS	B+C
2018	not published	14.6	17.1	−15%	485 of 1,294	Lloyd's Register	A

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.