Navalyze · Oil tanker · Ship

ASENA

IMO: 9274628
Type: Oil tanker
Average cargo carried: 15,605 t
Flag (estimated): Turkiye
Port of registry: Istanbul
Technical efficiency: EEXI 6.22 g CO₂/t·nm
Former names: MAERSK ERIN

ISM company (DoC holder) in 2025: AKAR DENIZ TASIMACILIGI VE TICARET ANONIM SIRKETI

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 15,605 t of cargo on average.

Fuel kg/nm

115

Oil tanker median 129 kg/nm (−11%)

CO₂ per transport work (cargo)

23.3

g CO₂/t·nm · Oil tanker median 7.95 (+194%)

Average speed

8.6 kn

Oil tanker median 10.7 kn (−20%)

Fuel per day at sea

23.6 t/day

Fuel consumed

244 t

CO₂ emitted

774 t

786 t CO₂eq incl. CH₄ and N₂O

Distance sailed

2,126 nm

CO₂ ÷ CO₂ per mile

Time at sea

247 h

10 days, 3% 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 115 kg/nm · median 129 (−11%)

76.1Ranks 578 of 1,665, lowest first191

Average speedThis ship 8.6 kn · median 10.7 (−20%)

8.0Faster than 14% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 23.3 g CO₂/t·nm · median 7.95 (+194%)

4.51Ranks 1,450 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 ports0%
From the EU53%
Into the EU31%
At berth in the EU16%

58% of this ship's CO₂ falls under the EU ETS (449 t).

Fuel burned laden

–

Not reported

CO₂ at berth

123 t

15.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.0 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+12 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

ASENA
Oil tanker median

75.0100.0125.0150.0175.0

’182018’222022’232023’242024’252025

Average speed, kn

ASENA
Oil tanker median

4.06.08.010.012.0

’182018’222022’232023’242024’252025

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

ASENA
Oil tanker median

0.020.040.060.080.0

’182018’222022’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+3.4 kn	−15%	+41%	−63%	−1%	3.4 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2023→2024	−6.5 kn	+59%	−30%	+4%	–	6.5 kn slower, fuel per mile up 59%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+6.7 kn	−50%	+17%	+261%	–	6.7 kn faster, fuel per mile down 50%; better than speed alone explains (hull, engine or trade).
2018→2022	−5.9 kn	+68%	−24%	−97%	+276%	5.9 kn slower, fuel per mile up 68%; worse than speed alone explains (fouling, weather, loading or trade).

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
2025	AKAR DENIZ TASIMACILIGI VE TICARET ANONIM SIRKETI	244	774	2,126	247	8.6	115	23.3	–
2024part-year	Tankmarine Gemi Isletmeciligi Tic.Ltd.Sti.	776	2,465	5,772	1,118	5.2	135	23.6	43%
2024	AKAR DENIZ TASIMACILIGI VE TICARET ANONIM SIRKETI	776	2,465	5,772	1,118	5.2	135	23.6	43%
2023	not published	471	1,492	5,575	476	11.7	84.4	19,110	44%
2022	not published	263	837	1,544	311	5.0	170	79.8	25%
2018	not published	4,975	15,776	49,077	4,490	10.9	101	21.2	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	AKAR DENIZ TASIMACILIGI VE TICARET ANONIM SIRKETI	23.3	7.95	+194%	1,450 of 1,665	Bureau Veritas	A
2024part-year	Tankmarine Gemi Isletmeciligi Tic.Ltd.Sti.	–	–	–	–	Lloyd's Register	A+B+C
2024	AKAR DENIZ TASIMACILIGI VE TICARET ANONIM SIRKETI	23.6	8.06	+193%	1,576 of 1,787	Bureau Veritas	A
2023	not published	–	–	–	–	Lloyd's Register	A+B+C
2022	not published	79.8	8.51	+837%	1,947 of 1,961	Lloyd's Register	A+B+C
2018	not published	21.2	8.86	+140%	1,557 of 1,779	ABS	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.