Navalyze · Oil tanker · Ship

SAN MARCOS

IMO: 9425540
Type: Oil tanker
Average cargo carried: 16,674 t
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 per mile

146.8 kg/nm

Oil tanker median 128.5 kg/nm (+14%)

CO₂ per transport work (cargo)

28.03

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 per mileThis ship 146.8 kg/nm · median 128.5 (+14%)

76.1Ranks 1,122 of 1,665, lowest first190.8

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

4.51Ranks 1,502 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 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

23.9%

Alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.015

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

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	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	GESTIONI ARMATORIALI SRL	5,025	15,998	34,229	3,060	11.2	146.8	28.03	–
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	13.10	53%
2021	not published	991	3,106	10,458	873	12.0	94.8	17.29	35%
2020	not published	471	1,476	4,368	420	10.4	107.9	10.89	–
2018	not published	3,302	10,372	31,359	4,288	7.3	105.3	14.58	–

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	28.03	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	16.73	−42%	224 of 1,274	RINA	A
2022	not published	13.10	16.06	−18%	485 of 1,409	ABS	B+C
2021	not published	17.29	16.69	+4%	716 of 1,343	ABS	B+C
2020	not published	10.89	16.16	−33%	239 of 1,312	ABS	B+C
2018	not published	14.58	17.14	−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.