Navalyze · Oil tanker · Ship

SIGRUN

IMO: 9612052
Type: Oil tanker
Average cargo carried: 61,250 t
Port of registry: Monrovia
Technical efficiency: EEXI 2.85 g CO₂/t·nm
Former names: KARVOUNIS

ISM company (DoC holder) in 2025: VLKR Ship Management L.L.C

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 61,250 t of cargo on average.

Fuel per mile

165.6 kg/nm

Oil tanker median 128.5 kg/nm (+29%)

CO₂ per transport work (cargo)

8.44

g CO₂/t·nm · Oil tanker median 7.95 (+6%)

Average speed

13.0 kn

Oil tanker median 10.7 kn (+21%)

Fuel per day at sea

51.8 t/day

Fuel consumed

6,997 t

CO₂ emitted

21,841 t

22,185 t CO₂eq incl. CH₄ and N₂O

Distance sailed

42,250 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,240 h

135 days, 37% 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 per mileThis ship 165.6 kg/nm · median 128.5 (+29%)

76.1Ranks 1,347 of 1,665, lowest first190.8

Average speedThis ship 13.0 kn · median 10.7 (+21%)

8.0Faster than 99% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 8.44 g CO₂/t·nm · median 7.95 (+6%)

4.51Ranks 911 of 1,665, lowest first27.66

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

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 ports0%
From the EU48%
Into the EU47%
At berth in the EU5%

53% of this ship's CO₂ falls under the EU ETS (11,519 t).

Fuel burned laden

–

Not reported

CO₂ at berth

5.5%

Alongside in EU ports

Methane (CH₄)

0.4 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift 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 per mile, kg/nm

SIGRUN
Oil tanker median

120.0140.0160.0180.0

’182018’202020’212021’232023’242024’252025

Average speed, kn

SIGRUN
Oil tanker median

6.08.010.012.014.0

’182018’202020’212021’232023’242024’252025

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

SIGRUN
Oil tanker median

0.020.040.060.0

’182018’202020’212021’232023’242024’252025

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+1.2 kn	−1%	+9%	+7%	−83%	1.2 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2023→2024	+1.7 kn	−6%	+10%	+259%	+896%	1.7 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2021→2023	−1.4 kn	−1%	−13%	−14%	−5%	1.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.5 kn	+17%	+11%	−61%	−31%	0.5 kn slower, fuel per mile up 17%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2020	+4.5 kn	−9%	+46%	+203%	+75%	4.5 kn faster, fuel per mile down 9%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	VLKR Ship Management L.L.C	6,997	21,841	42,250	3,240	13.0	165.6	8.44	–
2024	VLKR Ship Management L.L.C	6,597	20,599	39,362	3,343	11.8	167.6	49.11	–
2023	not published	1,946	6,086	10,965	1,088	10.1	177.4	4.93	–
2021	not published	2,274	7,147	12,717	1,109	11.5	178.9	5.21	–
2020	not published	4,989	15,759	32,617	2,708	12.0	152.9	7.54	–
2018	not published	1,813	5,663	10,760	1,434	7.5	168.5	4.30	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	VLKR Ship Management L.L.C	8.44	7.95	+6%	911 of 1,665	ClassNK	A+B+C
2024	VLKR Ship Management L.L.C	49.11	8.06	+509%	1,733 of 1,787	ClassNK	C
2023	not published	4.93	8.44	−42%	214 of 1,797	Lloyd's Register	A
2021	not published	5.21	8.86	−41%	263 of 1,789	Lloyd's Register	A
2020	not published	7.54	9.03	−17%	688 of 1,870	Lloyd's Register	A
2018	not published	4.30	8.86	−51%	181 of 1,779	Lloyd's Register	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.