Navalyze · Container · Ship

LEYLA KALKAVAN

IMO: 9126924
Type: Container ship
Average cargo carried: 6,038 t
Flag (estimated): Turkiye
Port of registry: İStanbul
Technical efficiency: EEXI 23.96 g CO₂/t·nm
Ice class: IC

ISM company (DoC holder) in 2025: KASIF GEMI ISLETMECILIGI A.S.

Report year

2019 at a glance

From the 2019 THETIS-MRV report. Carries about 6,244 t of cargo on average.

Fuel kg/nm

75.6

Container median 174 kg/nm (−57%)

CO₂ per transport work (cargo)

37.8

g CO₂/t·nm · Container median 18.9 (+100%)

Average speed

13.2 kn

Container median 13.7 kn (−4%)

Fuel per day at sea

24.0 t/day

Fuel consumed

1,604 t

CO₂ emitted

5,006 t

Distance sailed

21,210 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,605 h

67 days, 18% of the year

Within the container fleet, 2025

Set against all 2,208 container 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 79.3 kg/nm · median 177 (−55%)

78.8Ranks 234 of 2,208, lowest first302

Average speedThis ship 9.6 kn · median 13.3 (−28%)

9.1Faster than 13% of container ships16.0

CO₂ per transport work (cargo)This ship 41.2 g CO₂/t·nm · median 16.3 (+153%)

7.22Ranks 1,899 of 2,208, lowest first46.9

Middle 80% of shipsMiddle 50%Container medianThis ship

Where the emissions happen, 2019

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 ports15%
From the EU26%
Into the EU53%
At berth in the EU6%

Fuel burned laden

–

Not reported

CO₂ at berth

307 t

6.1% 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 Container median is the middle ship of all container ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

LEYLA KALKAVAN
Container median

50.0100.0150.0200.0

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

Average speed, kn

LEYLA KALKAVAN
Container median

8.010.012.014.016.0

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

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

LEYLA KALKAVAN
Container median

0.020.040.060.080.0

’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	−2.1 kn	+0%	−18%	+104%	+11%	2.1 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.8 kn	−25%	−19%	−44%	−44%	0.8 kn faster, fuel per mile down 25%; better than speed alone explains (hull, engine or trade).
2022→2023	−1.6 kn	+32%	+15%	+23%	−1%	1.6 kn slower, fuel per mile up 32%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	−0.9 kn	−4%	−11%	−78%	+39%	0.9 kn slower, fuel per mile down 4%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.0 kn	+11%	+11%	+90%	−3%	Same speed, fuel per mile up 11%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.2 kn	−1%	−0%	−15%	+32%	Same speed, fuel per mile flat.
2018→2019	+1.2 kn	−12%	−3%	+13%	−18%	1.2 kn faster, fuel per mile down 12%; 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	KASIF GEMI ISLETMECILIGI A.S.	828	2,596	10,441	1,091	9.6	79.3	41.2	–
2024	KASIF GEMI ISLETMECILIGI A.S.	406	1,269	5,126	438	11.7	79.2	37.1	–
2023	not published	958	3,004	9,104	838	10.9	105	66.6	–
2022	not published	591	1,845	7,429	596	12.5	79.5	67.1	100%
2021	not published	2,851	8,909	34,297	2,568	13.4	83.1	48.4	100%
2020	not published	1,345	4,197	18,021	1,349	13.4	74.6	49.9	100%
2019	not published	1,604	5,006	21,210	1,605	13.2	75.6	37.8	–
2018	not published	1,625	5,081	18,842	1,570	12.0	86.2	46.2	100%

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Container median	vs Container	Rank	Verifier	Methods
2025	KASIF GEMI ISLETMECILIGI A.S.	41.2	16.3	+153%	1,899 of 2,208	DNV	A
2024	KASIF GEMI ISLETMECILIGI A.S.	37.1	17.5	+112%	1,573 of 1,974	DNV	A
2023	not published	66.6	19.4	+243%	1,821 of 1,899	DNV	A
2022	not published	67.1	19.1	+251%	1,754 of 1,825	Verifavia	A
2021	not published	48.4	17.9	+170%	1,583 of 1,781	Verifavia	A
2020	not published	49.9	17.6	+184%	1,598 of 1,797	Verifavia	A
2019	not published	37.8	18.9	+100%	1,386 of 1,788	Verifavia	A
2018	not published	46.2	20.2	+128%	1,429 of 1,705	Verifavia	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Container 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 container 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.