Navalyze · Oil tanker · Ship

YASA GOLDEN BOSPHORUS

IMO: 9334038
Type: Oil tanker
Average cargo carried: 77,715 t
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EIV 4.61 g CO₂/t·nm

ISM company (DoC holder) in 2025: YASA TANKER ISLETMECILIGI A.S.

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 77,715 t of cargo on average.

Fuel kg/nm

163

Oil tanker median 129 kg/nm (+27%)

CO₂ per transport work (cargo)

6.55

g CO₂/t·nm · Oil tanker median 7.95 (−18%)

Average speed

10.5 kn

Oil tanker median 10.7 kn (−2%)

Fuel per day at sea

40.8 t/day

Fuel consumed

4,313 t

CO₂ emitted

13,499 t

13,711 t CO₂eq incl. CH₄ and N₂O

Distance sailed

26,519 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,537 h

106 days, 29% 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 163 kg/nm · median 129 (+27%)

76.1Ranks 1,324 of 1,665, lowest first191

Average speedThis ship 10.5 kn · median 10.7 (−2%)

8.0Faster than 42% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 6.55 g CO₂/t·nm · median 7.95 (−18%)

4.51Ranks 549 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 ports12%
From the EU54%
Into the EU28%
At berth in the EU6%

57% of this ship's CO₂ falls under the EU ETS (7,736 t).

Fuel burned laden

–

Not reported

CO₂ at berth

792 t

5.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+212 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

YASA GOLDEN BOSPHORUS
Oil tanker median

100.0150.0200.0250.0300.0

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

Average speed, kn

YASA GOLDEN BOSPHORUS
Oil tanker median

6.08.010.012.014.0

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

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

YASA GOLDEN BOSPHORUS
Oil tanker median

5.010.015.020.025.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.3 kn	+0%	−2%	+98%	–	0.3 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.5 kn	+2%	−3%	−9%	–	0.5 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+4.3 kn	−30%	+13%	−11%	−57%	4.3 kn faster, fuel per mile down 30%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.6 kn	+23%	+1%	−33%	+123%	1.6 kn slower, fuel per mile up 23%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−3.2 kn	+23%	−11%	−34%	+4%	3.2 kn slower, fuel per mile up 23%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	−0.7 kn	−45%	−49%	+369%	−12%	0.7 kn slower, fuel per mile down 45%; better than speed alone explains (hull, engine or trade).
2018→2019	+4.1 kn	+33%	+98%	−72%	−22%	4.1 kn faster, fuel per mile up 33%; 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	YASA TANKER ISLETMECILIGI A.S.	4,313	13,499	26,519	2,537	10.5	163	6.55	–
2024	YASA TANKER ISLETMECILIGI A.S.	2,175	6,817	13,418	1,248	10.8	162	–	–
2023	not published	2,360	7,463	14,795	1,314	11.3	160	10.8	–
2022	not published	3,762	11,907	16,531	2,361	7.0	228	25.0	–
2021	not published	4,580	14,506	24,854	2,905	8.6	184	11.2	–
2020	not published	5,635	17,850	37,566	3,189	11.8	150	10.7	–
2019	not published	2,201	6,876	8,018	641	12.5	275	12.2	–
2018	not published	5,978	18,685	29,038	3,443	8.4	206	15.6	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	YASA TANKER ISLETMECILIGI A.S.	6.55	7.95	−18%	549 of 1,665	ClassNK	A+B
2024	YASA TANKER ISLETMECILIGI A.S.	–	–	–	–	ClassNK	A
2023	not published	10.8	8.44	+27%	1,195 of 1,797	ClassNK	A
2022	not published	25.0	8.51	+193%	1,765 of 1,961	ClassNK	A
2021	not published	11.2	8.86	+27%	1,177 of 1,789	ClassNK	A
2020	not published	10.7	9.03	+19%	1,146 of 1,870	ClassNK	A
2019	not published	12.2	8.83	+38%	1,347 of 1,919	ClassNK	A
2018	not published	15.6	8.86	+76%	1,418 of 1,779	ClassNK	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.