Navalyze · Oil tanker · Ship

SEAMARLIN

IMO: 9380489
Type: Oil tanker
Average cargo carried: 15,641 t
Flag (estimated): Germany
Port of registry: Bremen
Technical efficiency: EIV 8.47 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: German Tanker Shipping GmbH

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 19,186 t of cargo on average.

Fuel kg/nm

122

Oil tanker median 129 kg/nm (−6%)

CO₂ per transport work (cargo)

20.2

g CO₂/t·nm · Oil tanker median 8.44 (+139%)

Average speed

10.5 kn

Oil tanker median 11.0 kn (−5%)

Fuel per day at sea

30.8 t/day

Fuel consumed

4,302 t

CO₂ emitted

13,670 t

Distance sailed

35,307 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,348 h

140 days, 38% 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 120 kg/nm · median 129 (−6%)

76.1Ranks 684 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 24.5 g CO₂/t·nm · median 7.95 (+208%)

4.51Ranks 1,464 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2023

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 ports55%
From the EU22%
Into the EU14%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

1,255 t

9.2% 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 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

SEAMARLIN
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

SEAMARLIN
Oil tanker median

6.08.010.012.014.0

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

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

SEAMARLIN
Oil tanker median

5.010.015.020.025.0

’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	−0.2 kn	−14%	−15%	−7%	−1%	Same speed, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.4 kn	+15%	+19%	−11%	+22%	0.4 kn faster, fuel per mile up 15%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+3.2 kn	+16%	+68%	−18%	+3%	3.2 kn faster, fuel per mile up 16%; better than speed alone explains (hull, engine or trade).
2021→2022	−4.0 kn	+5%	−32%	−14%	+4%	4.0 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.3 kn	−8%	−5%	−4%	−6%	0.3 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2019→2020	−1.1 kn	−3%	−13%	−7%	+12%	1.1 kn slower, fuel per mile down 3%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	+2.9 kn	+13%	+48%	−7%	−13%	2.9 kn faster, fuel per mile up 13%; 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	German Tanker Shipping GmbH	3,536	11,251	29,372	2,742	10.7	120	24.5	–
2024	German Tanker Shipping GmbH	4,406	13,980	31,534	2,894	10.9	140	24.7	–
2023	not published	4,302	13,670	35,307	3,348	10.5	122	20.2	–
2022	not published	4,504	14,317	43,078	5,920	7.3	105	19.6	–
2021	not published	4,985	15,769	50,214	4,450	11.3	99.3	18.9	54%
2020	not published	5,622	17,760	52,221	4,747	11.0	108	20.0	–
2019	not published	6,246	19,664	55,963	4,614	12.1	112	17.9	–
2018	not published	5,955	18,776	60,205	6,512	9.2	98.9	20.4	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	German Tanker Shipping GmbH	24.5	7.95	+208%	1,464 of 1,665	Verifavia	A
2024	German Tanker Shipping GmbH	24.7	8.06	+206%	1,590 of 1,787	Verifavia	A
2023	not published	20.2	8.44	+139%	1,540 of 1,797	Verifavia	A
2022	not published	19.6	8.51	+130%	1,684 of 1,961	Verifavia	A
2021	not published	18.9	8.86	+113%	1,501 of 1,789	ABS	A
2020	not published	20.0	9.03	+122%	1,584 of 1,870	ABS	A
2019	not published	17.9	8.83	+102%	1,591 of 1,919	ABS	A
2018	not published	20.4	8.86	+131%	1,539 of 1,779	ABS	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.