Navalyze · Oil tanker · Ship

OVERSEAS MYKONOS

IMO: 9435894
Type: Oil tanker
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 5,914 t of cargo on average.

Fuel kg/nm

135

Oil tanker median 140 kg/nm (−3%)

CO₂ per transport work (cargo)

72.0

g CO₂/t·nm · Oil tanker median 8.86 (+713%)

Average speed

2.8 kn

Oil tanker median 9.8 kn (−71%)

Fuel per day at sea

9.2 t/day

Fuel consumed

366 t

CO₂ emitted

1,151 t

Distance sailed

2,703 nm

CO₂ ÷ CO₂ per mile

Time at sea

955 h

40 days, 11% of the year

Within the oil tanker fleet, 2023

Set against all 1,797 oil tanker ships with a full-year 2023 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 105 kg/nm · median 129 (−19%)

80.4Ranks 473 of 1,797, lowest first193

Average speedThis ship 5.5 kn · median 11.0 (−50%)

8.1Faster than 2% of oil tanker ships12.4

CO₂ per transport work (cargo)This ship 23.9 g CO₂/t·nm · median 8.44 (+183%)

4.78Ranks 1,601 of 1,797, lowest first25.5

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 ports0%
From the EU16%
Into the EU82%
At berth in the EU2%

Fuel burned laden

–

Not reported

CO₂ at berth

19 t

1.6% 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 MYKONOS
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

OVERSEAS MYKONOS
Oil tanker median

0.05.010.015.0

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

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

OVERSEAS MYKONOS
Oil tanker median

0.020.040.060.080.0

’182018’192019’202020’212021’222022’232023

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2023→2025	–	–	–	–	–
2022→2023	−7.5 kn	+1%	−57%	+20%	−28%	7.5 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+1.1 kn	+4%	+14%	−66%	+112%	1.1 kn faster, fuel per mile up 4%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.6 kn	−2%	+3%	+82%	+37%	0.6 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2019→2020	+4.0 kn	−5%	+47%	+135%	−9%	4.0 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2018→2019	+4.5 kn	−21%	+103%	+273%	−83%	4.5 kn faster, fuel per mile down 21%; 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	0	0	–	0	–	–	–	–
2023	not published	1,823	5,708	17,434	3,166	5.5	105	23.9	–
2022	not published	1,507	4,715	14,565	1,117	13.0	104	33.0	–
2021	not published	4,299	13,476	43,236	3,644	11.9	99.4	15.6	–
2020	not published	2,407	7,565	23,736	2,107	11.3	101	11.4	–
2019	not published	1,077	3,363	10,095	1,379	7.3	107	12.5	–
2018	not published	366	1,151	2,703	955	2.8	135	72.0	–

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	–	–	–	–	Verifavia	A+C
2023	not published	23.9	8.44	+183%	1,601 of 1,797	Verifavia	–
2022	not published	33.0	8.51	+288%	1,845 of 1,961	Verifavia	A
2021	not published	15.6	8.86	+76%	1,403 of 1,789	Verifavia	B
2020	not published	11.4	9.03	+26%	1,191 of 1,870	Verifavia	A
2019	not published	12.5	8.83	+42%	1,372 of 1,919	Verifavia	A
2018	not published	72.0	8.86	+713%	1,765 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.