Navalyze · Oil tanker · Ship

OTTOMAN TENACITY

IMO: 9590682
Type: Oil tanker
Average cargo carried: 68,793 t
Flag (estimated): Turkiye
Port of registry: Istanbul
Technical efficiency: EEXI 2.90 g CO₂/t·nm

ISM company (DoC holder) in 2025: Gungen Denizcilik ve Ticaret A.S.

Report year

2021 at a glance

From the 2021 THETIS-MRV report. Carries about 59,451 t of cargo on average.

Fuel kg/nm

161

Oil tanker median 129 kg/nm (+25%)

CO₂ per transport work (cargo)

8.47

g CO₂/t·nm · Oil tanker median 8.86 (−4%)

Average speed

9.7 kn

Oil tanker median 10.7 kn (−9%)

Fuel per day at sea

37.5 t/day

Fuel consumed

6,445 t

CO₂ emitted

20,117 t

Distance sailed

39,950 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,121 h

172 days, 47% 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 151 kg/nm · median 129 (+17%)

76.1Ranks 1,190 of 1,665, lowest first191

Average speedThis ship 11.7 kn · median 10.7 (+9%)

8.0Faster than 79% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 6.86 g CO₂/t·nm · median 7.95 (−14%)

4.51Ranks 616 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2021

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 ports2%
From the EU44%
Into the EU46%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

1,684 t

8.4% 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

OTTOMAN TENACITY
Oil tanker median

125.0150.0175.0200.0225.0

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

Average speed, kn

OTTOMAN TENACITY
Oil tanker median

6.08.010.012.0

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

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

OTTOMAN TENACITY
Oil tanker median

6.07.08.09.010.0

’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	+0.7 kn	+13%	+20%	+91%	+3%	0.7 kn faster, fuel per mile up 13%; in line with the speed change.
2022→2024	+2.5 kn	−36%	−19%	+160%	−18%	2.5 kn faster, fuel per mile down 36%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.2 kn	+30%	+15%	−71%	−3%	1.2 kn slower, fuel per mile up 30%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.5 kn	+2%	−12%	+268%	+36%	1.5 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+4.5 kn	−15%	+42%	−59%	−13%	4.5 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2018→2019	−5.0 kn	+21%	−31%	+18%	+5%	5.0 kn slower, fuel per mile up 21%; worse than speed alone explains (fouling, weather, loading 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	Gungen Denizcilik ve Ticaret A.S.	8,659	27,158	57,547	4,924	11.7	151	6.86	–
2024	Gungen Denizcilik ve Ticaret A.S.	4,019	12,584	30,072	2,746	11.0	134	6.69	–
2022	not published	2,438	7,623	11,583	1,356	8.5	210	8.19	–
2021	not published	6,445	20,117	39,950	4,121	9.7	161	8.47	–
2020	not published	1,715	5,363	10,862	969	11.2	158	6.24	–
2019	not published	4,881	15,263	26,387	3,913	6.7	185	7.16	–
2018	not published	3,417	10,696	22,268	1,903	11.7	154	6.85	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Gungen Denizcilik ve Ticaret A.S.	6.86	7.95	−14%	616 of 1,665	DNV	B+C
2024	Gungen Denizcilik ve Ticaret A.S.	6.69	8.06	−17%	602 of 1,787	DNV	B+C
2022	not published	8.19	8.51	−4%	930 of 1,961	DNV	C
2021	not published	8.47	8.86	−4%	839 of 1,789	DNV	C
2020	not published	6.24	9.03	−31%	406 of 1,870	DNV	C
2019	not published	7.16	8.83	−19%	647 of 1,919	DNV	C
2018	not published	6.85	8.86	−23%	553 of 1,779	DNV	C

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.