Navalyze · Oil tanker · Ship

ALASKA

IMO: 9302607
Type: Oil tanker
Average cargo carried: 75,249 t
Flag (estimated): Marshall Islands
Port of registry: Majuro
Technical efficiency: EEXI 2.78 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: Tsakos Shipping & Trading S.A. · part of Tsakos

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 89,698 t of cargo on average.

Fuel kg/nm

190

Oil tanker median 134 kg/nm (+42%)

CO₂ per transport work (cargo)

6.68

g CO₂/t·nm · Oil tanker median 9.03 (−26%)

Average speed

11.1 kn

Oil tanker median 11.0 kn (+1%)

Fuel per day at sea

50.8 t/day

Fuel consumed

11,286 t

CO₂ emitted

35,579 t

Distance sailed

59,380 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,336 h

222 days, 61% 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 166 kg/nm · median 129 (+29%)

76.1Ranks 1,350 of 1,665, lowest first191

Average speedThis ship 11.5 kn · median 10.7 (+7%)

8.0Faster than 74% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 6.94 g CO₂/t·nm · median 7.95 (−13%)

4.51Ranks 634 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2020

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 ports1%
From the EU44%
Into the EU48%
At berth in the EU7%

Fuel burned laden

–

Not reported

CO₂ at berth

2,519 t

7.1% 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 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

ALASKA
Oil tanker median

120.0140.0160.0180.0200.0220.0

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

Average speed, kn

ALASKA
Oil tanker median

9.010.011.012.0

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

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

ALASKA
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	+2.3 kn	−4%	+19%	+83%	−19%	2.3 kn faster, fuel per mile down 4%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.4 kn	−14%	−17%	−11%	−6%	0.4 kn slower, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2022→2023	−2.4 kn	+30%	+5%	+504%	−59%	2.4 kn slower, fuel per mile up 30%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+2.3 kn	−18%	+1%	−84%	+223%	2.3 kn faster, fuel per mile down 18%; better than speed alone explains (hull, engine or trade).
2020→2021	−1.4 kn	−1%	−13%	−13%	+2%	1.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.4 kn	−2%	+2%	+99%	−8%	0.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2018→2019	+1.6 kn	−5%	+12%	+39%	+31%	1.6 kn faster, fuel per mile down 5%; 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	Tsakos Shipping & Trading S.A.	13,487	42,441	81,268	7,071	11.5	166	6.94	75%
2024	Tsakos Shipping & Trading S.A.	7,710	24,268	44,470	4,809	9.2	173	8.60	83%
2023	not published	10,120	31,763	50,075	5,212	9.6	202	9.13	–
2022	not published	1,285	4,048	8,296	693	12.0	155	22.1	–
2021	not published	9,730	30,549	51,628	5,305	9.7	189	6.84	–
2020	not published	11,286	35,579	59,380	5,336	11.1	190	6.68	–
2019	not published	5,781	18,175	29,815	2,795	10.7	194	7.23	–
2018	not published	4,346	13,591	21,375	2,359	9.1	203	5.54	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Tsakos Shipping & Trading S.A.	6.94	7.95	−13%	634 of 1,665	Lloyd's Register	A
2024	Tsakos Shipping & Trading S.A.	8.60	8.06	+7%	990 of 1,787	Lloyd's Register	A
2023	not published	9.13	8.44	+8%	1,008 of 1,797	Lloyd's Register	–
2022	not published	22.1	8.51	+160%	1,730 of 1,961	Lloyd's Register	–
2021	not published	6.84	8.86	−23%	564 of 1,789	Lloyd's Register	–
2020	not published	6.68	9.03	−26%	499 of 1,870	Lloyd's Register	–
2019	not published	7.23	8.83	−18%	662 of 1,919	Lloyd's Register	–
2018	not published	5.54	8.86	−37%	366 of 1,779	Lloyd's Register	–

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.