Navalyze · Oil tanker · Ship

BLUE LAGOON I

IMO: 9248447
Type: Oil tanker
Technical efficiency: EEXI 2.28 g CO₂/t·nm
Former names: GRENA KNUTSEN

Report year

2023 at a glance

From the 2023 THETIS-MRV report.

Fuel per mile

222.4 kg/nm

CO₂ per transport work (cargo)

–

g CO₂/t·nm

Average speed

8.6 kn

Fuel per day at sea

46.0 t/day

Fuel consumed

462 t

CO₂ emitted

1,479 t

Distance sailed

2,079 nm

CO₂ ÷ CO₂ per mile

Time at sea

241 h

10 days, 3% of the year

Within the oil tanker fleet, 2022

Set against all 1,961 oil tanker ships with a full-year 2022 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 284.4 kg/nm · median 131.1 (+117%)

79.6Ranks 1,939 of 1,961, lowest first192.4

Average speedThis ship 8.2 kn · median 10.9 (−25%)

7.9Faster than 12% of oil tanker ships12.3

CO₂ per transport work (cargo)This ship 22.46 g CO₂/t·nm · median 8.51 (+164%)

4.85Ranks 1,734 of 1,961, lowest first24.95

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 ports80%
From the EU13%
Into the EU0%
At berth in the EU7%

Fuel burned laden

–

Not reported

CO₂ at berth

5.8%

Alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

–

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

BLUE LAGOON I
Oil tanker median

100.0150.0200.0250.0300.0

’182018’192019’202020’212021’222022’232023

Average speed, kn

BLUE LAGOON I
Oil tanker median

4.06.08.010.012.0

’182018’192019’202020’212021’222022’232023

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

BLUE LAGOON I
Oil tanker median

5.010.015.020.025.0

’182018’192019’202020’212021’222022

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2022→2023	+0.4 kn	−22%	−18%	−93%	–	0.4 kn faster, fuel per mile down 22%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.8 kn	+8%	+20%	+5%	+7%	0.8 kn faster, fuel per mile up 8%; better than speed alone explains (hull, engine or trade).
2020→2021	−0.9 kn	−1%	−11%	−26%	+24%	0.9 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+2.2 kn	+10%	+49%	+2%	−4%	2.2 kn faster, fuel per mile up 10%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.6 kn	−17%	−9%	+11%	−18%	0.6 kn faster, fuel per mile down 17%; 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
2023	not published	462	1,479	2,079	241	8.6	222.4	–	–
2022	not published	9,037	28,777	31,780	3,854	8.2	284.4	22.46	–
2021	not published	7,960	25,363	30,162	4,062	7.4	263.9	21.08	–
2020	not published	10,807	34,372	40,742	4,930	8.3	265.3	17.06	–
2019	not published	9,662	30,975	40,031	6,591	6.1	241.3	17.81	–
2018	not published	10,455	33,064	35,915	6,485	5.5	291.1	21.81	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2023	not published	–	–	–	–	ICS Verification Services	A
2022	not published	22.46	8.51	+164%	1,734 of 1,961	Lloyd's Register	B
2021	not published	21.08	8.86	+138%	1,546 of 1,789	Lloyd's Register	B
2020	not published	17.06	9.03	+89%	1,502 of 1,870	Lloyd's Register	B
2019	not published	17.81	8.83	+102%	1,589 of 1,919	Lloyd's Register	–
2018	not published	21.81	8.86	+146%	1,569 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.