Navalyze · Oil tanker · Ship

SUMER

IMO: 9314856
Type: Oil tanker
Average cargo carried: 15,240 t
Flag (estimated): Turkiye
Port of registry: Istanbul
Technical efficiency: EEXI 5.73 g CO₂/t·nm
Ice class: IB
Former names: KANDAVA, SAN SEBASTIAN

ISM company (DoC holder) in 2025: GESTIONI ARMATORIALI SRL

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 15,240 t of cargo on average.

Fuel kg/nm

108

Oil tanker median 129 kg/nm (−16%)

CO₂ per transport work (cargo)

22.7

g CO₂/t·nm · Oil tanker median 7.95 (+185%)

Average speed

10.7 kn

Oil tanker median 10.7 kn (+0%)

Fuel per day at sea

27.7 t/day

Fuel consumed

1,484 t

CO₂ emitted

4,758 t

4,831 t CO₂eq incl. CH₄ and N₂O

Distance sailed

13,765 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,286 h

54 days, 15% 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 108 kg/nm · median 129 (−16%)

76.1Ranks 490 of 1,665, lowest first191

Average speedThis ship 10.7 kn · median 10.7 (+0%)

8.0Faster than 49% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 22.7 g CO₂/t·nm · median 7.95 (+185%)

4.51Ranks 1,440 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 ports38%
From the EU21%
Into the EU24%
At berth in the EU17%

0% of this ship's CO₂ falls under the EU ETS (0 t).

Fuel burned laden

–

Not reported

CO₂ at berth

827 t

17.4% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+73 t

+1.5% 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

SUMER
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

SUMER
Oil tanker median

8.09.010.011.0

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

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

SUMER
Oil tanker median

5.010.015.020.025.030.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.6 kn	+12%	+19%	−20%	+42%	0.6 kn faster, fuel per mile up 12%; in line with the speed change.
2023→2024	−0.6 kn	+3%	−3%	−70%	−5%	0.6 kn slower, fuel per mile up 3%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+2.3 kn	−13%	+10%	+170%	−17%	2.3 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.0 kn	−3%	−4%	−28%	−20%	Same speed, fuel per mile down 3%; in line with the speed change.
2020→2021	−0.7 kn	−12%	−18%	−14%	+45%	0.7 kn slower, fuel per mile down 12%; in line with the speed change.
2019→2020	+0.1 kn	+28%	+29%	+8%	−3%	Same speed, fuel per mile up 28%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+0.4 kn	+9%	+14%	−43%	−2%	0.4 kn faster, fuel per mile up 9%; in line with the speed change.

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	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025part-year	GESTIONI ARMATORIALI SRL	1,484	4,758	13,765	1,286	10.7	108	22.7	–
2025	Trans Ka Tanker Isletmeciligi Ticaret Ltd Sti.	1,484	4,758	13,765	1,286	10.7	108	22.7	–
2024	GESTIONI ARMATORIALI SRL	1,644	5,206	17,123	1,700	10.1	96.0	16.0	–
2023	not published	5,267	16,698	56,417	5,290	10.7	93.3	16.8	–
2022	not published	2,240	7,087	20,901	2,477	8.4	107	20.1	–
2021	not published	3,236	10,226	29,174	3,454	8.4	111	25.3	–
2020	not published	4,254	13,483	33,913	3,732	9.1	125	17.5	–
2019	not published	3,076	9,798	31,412	3,480	9.0	97.9	18.1	–
2018	not published	4,929	15,716	54,901	6,368	8.6	89.8	18.3	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025part-year	GESTIONI ARMATORIALI SRL	–	–	–	–	RINA	A
2025	Trans Ka Tanker Isletmeciligi Ticaret Ltd Sti.	22.7	7.95	+185%	1,440 of 1,665	RINA	A
2024	GESTIONI ARMATORIALI SRL	16.0	8.06	+98%	1,446 of 1,787	RINA	A
2023	not published	16.8	8.44	+99%	1,466 of 1,797	RINA	A
2022	not published	20.1	8.51	+137%	1,698 of 1,961	RINA	A
2021	not published	25.3	8.86	+185%	1,614 of 1,789	RINA	A
2020	not published	17.5	9.03	+94%	1,522 of 1,870	RINA	A
2019	not published	18.1	8.83	+104%	1,593 of 1,919	RINA	A
2018	not published	18.3	17.1	+7%	719 of 1,294	DNV	B+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.