Navalyze · Oil tanker · Ship

FRONT SEOUL

IMO: 9831854
Type: Oil tanker
Average cargo carried: 73,573 t
Flag (estimated): Hong Kong (China)
Port of registry: Hong Kong
Technical efficiency: EEXI 2.77 g CO₂/t·nm

ISM company (DoC holder) in 2025: Sea 206 Leasing Co Ltd

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 73,573 t of cargo on average.

Fuel kg/nm

131

Oil tanker median 129 kg/nm (+2%)

CO₂ per transport work (cargo)

5.55

g CO₂/t·nm · Oil tanker median 7.95 (−30%)

Average speed

9.5 kn

Oil tanker median 10.7 kn (−11%)

Fuel per day at sea

29.7 t/day

Fuel consumed

4,797 t

CO₂ emitted

14,982 t

15,217 t CO₂eq incl. CH₄ and N₂O

Distance sailed

36,691 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,873 h

161 days, 44% 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 131 kg/nm · median 129 (+2%)

76.1Ranks 882 of 1,665, lowest first191

Average speedThis ship 9.5 kn · median 10.7 (−11%)

8.0Faster than 23% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 5.55 g CO₂/t·nm · median 7.95 (−30%)

4.51Ranks 355 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 ports2%
From the EU33%
Into the EU57%
At berth in the EU9%

55% of this ship's CO₂ falls under the EU ETS (8,250 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,291 t

8.6% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+235 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

FRONT SEOUL
Oil tanker median

120.0130.0140.0150.0160.0

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

Average speed, kn

FRONT SEOUL
Oil tanker median

9.010.011.012.013.0

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

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

FRONT SEOUL
Oil tanker median

4.06.08.010.0

’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	−1.8 kn	−13%	−27%	−31%	−8%	1.8 kn slower, fuel per mile down 13%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+0.8 kn	+3%	+11%	+32%	+12%	0.8 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2022→2023	−1.9 kn	+1%	−15%	+279%	−16%	1.9 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+3.2 kn	+5%	+42%	−66%	+3%	3.2 kn faster, fuel per mile up 5%; better than speed alone explains (hull, engine or trade).
2020→2021	−3.3 kn	+5%	−22%	−20%	+39%	3.3 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.8 kn	−3%	+4%	+12%	−4%	0.8 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine 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	Sea 206 Leasing Co Ltd	4,797	14,982	36,691	3,873	9.5	131	5.55	–
2024part-year	HAI KUO SHIPPING 1974T LTD	7,907	24,720	53,354	4,708	11.3	148	5.95	–
2024	Sea 206 Leasing Co Ltd	8,025	25,094	53,354	4,708	11.3	150	6.04	–
2023	not published	5,904	18,449	40,404	3,860	10.5	146	5.41	–
2022	not published	1,546	4,831	10,668	860	12.4	145	6.47	–
2021	not published	4,369	13,647	31,766	3,452	9.2	138	6.27	–
2020	not published	5,217	16,294	39,839	3,199	12.5	131	4.52	–
2019	not published	4,776	14,890	35,562	3,051	11.7	134	4.73	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Sea 206 Leasing Co Ltd	5.55	7.95	−30%	355 of 1,665	DNV	A
2024part-year	HAI KUO SHIPPING 1974T LTD	–	–	–	–	DNV	A
2024	Sea 206 Leasing Co Ltd	6.04	8.06	−25%	488 of 1,787	DNV	A
2023	not published	5.41	8.44	−36%	302 of 1,797	DNV	A
2022	not published	6.47	8.51	−24%	567 of 1,961	DNV	B
2021	not published	6.27	8.86	−29%	460 of 1,789	DNV	B
2020	not published	4.52	9.03	−50%	153 of 1,870	ABS	B
2019	not published	4.73	8.83	−46%	213 of 1,919	ABS	B

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.