Navalyze · Oil tanker · Ship

OVERSEAS SANTORINI

IMO: 9435909
Type: Oil tanker
Average cargo carried: 7,630 t
Flag (estimated): United States
Port of registry: Wilmington
Technical efficiency: EIV 5.37 g CO₂/t·nm

ISM company (DoC holder) in 2025: OSG Ship Management Inc

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 3,889 t of cargo on average.

Fuel kg/nm

120

Oil tanker median 140 kg/nm (−14%)

CO₂ per transport work (cargo)

96.7

g CO₂/t·nm · Oil tanker median 8.86 (+991%)

Average speed

5.2 kn

Oil tanker median 9.8 kn (−47%)

Fuel per day at sea

14.9 t/day

Fuel consumed

3,053 t

CO₂ emitted

9,549 t

Distance sailed

25,406 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,921 h

205 days, 56% 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 104 kg/nm · median 129 (−19%)

76.1Ranks 450 of 1,665, lowest first191

Average speedThis ship 13.2 kn · median 10.7 (+23%)

8.0Faster than 99% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 43.6 g CO₂/t·nm · median 7.95 (+448%)

4.51Ranks 1,588 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2018

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 ports20%
From the EU42%
Into the EU33%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

474 t

5.0% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

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

OVERSEAS SANTORINI
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

OVERSEAS SANTORINI
Oil tanker median

2.55.07.510.012.515.0

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

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

OVERSEAS SANTORINI
Oil tanker median

0.025.050.075.0100

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.9 kn	+2%	−4%	+158%	+288%	0.9 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+9.8 kn	+5%	+243%	−13%	–	9.8 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2022→2023	−8.6 kn	−5%	−68%	−83%	–	8.6 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+1.3 kn	+2%	+13%	+23%	+27%	1.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2020→2021	−0.5 kn	−7%	−11%	+106%	+25%	0.5 kn slower, fuel per mile down 7%; in line with the speed change.
2019→2020	+4.5 kn	−12%	+41%	−37%	−34%	4.5 kn faster, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2018→2019	+2.4 kn	+0%	+47%	+4%	−79%	2.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine 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	OSG Ship Management Inc	1,682	5,393	16,230	1,225	13.2	104	43.6	–
2024	OSG Ship Management Inc	637	2,015	6,292	445	14.1	101	11.2	–
2023	not published	697	2,188	7,242	1,670	4.3	96.2	275	–
2022	not published	4,226	13,251	41,842	3,253	12.9	101	20.9	–
2021	not published	3,372	10,559	33,982	2,937	11.6	99.2	16.5	–
2020	not published	1,754	5,485	16,483	1,362	12.1	106	13.2	–
2019	not published	3,168	9,919	26,309	3,473	7.6	120	20.0	–
2018	not published	3,053	9,549	25,406	4,921	5.2	120	96.7	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	OSG Ship Management Inc	43.6	7.95	+448%	1,588 of 1,665	Verifavia	A+C
2024	OSG Ship Management Inc	11.2	8.06	+39%	1,265 of 1,787	Verifavia	A+C
2023	not published	–	–	–	–	Verifavia	–
2022	not published	20.9	8.51	+145%	1,714 of 1,961	Verifavia	A
2021	not published	16.5	8.86	+86%	1,431 of 1,789	Verifavia	B
2020	not published	13.2	9.03	+46%	1,322 of 1,870	Verifavia	A
2019	not published	20.0	8.83	+127%	1,637 of 1,919	Verifavia	A
2018	not published	96.7	8.86	+991%	1,777 of 1,779	Verifavia	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.