Navalyze · Oil tanker · Ship

HEATHER KNUTSEN

IMO: 9273064
Type: Oil tanker
Average cargo carried: 19,715 t
Flag (estimated): Norway
Port of registry: Haugesund
Technical efficiency: EEXI 2.91 g CO₂/t·nm

ISM company (DoC holder) in 2025: Canship Ugland Ltd

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 69,346 t of cargo on average.

Fuel kg/nm

371

Oil tanker median 140 kg/nm (+165%)

CO₂ per transport work (cargo)

17.1

g CO₂/t·nm · Oil tanker median 8.86 (+93%)

Average speed

3.8 kn

Oil tanker median 9.8 kn (−61%)

Fuel per day at sea

34.2 t/day

Fuel consumed

8,726 t

CO₂ emitted

27,977 t

Distance sailed

23,551 nm

CO₂ ÷ CO₂ per mile

Time at sea

6,126 h

255 days, 70% 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 248 kg/nm · median 129 (+93%)

76.1Ranks 1,625 of 1,665, lowest first191

Average speedThis ship 8.1 kn · median 10.7 (−24%)

8.0Faster than 11% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 40.3 g CO₂/t·nm · median 7.95 (+407%)

4.51Ranks 1,575 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2018

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 ports86%
From the EU0%
Into the EU5%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

2,563 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

HEATHER KNUTSEN
Oil tanker median

100.0200.0300.0400.0

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

Average speed, kn

HEATHER KNUTSEN
Oil tanker median

2.04.06.08.010.012.0

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

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

HEATHER KNUTSEN
Oil tanker median

0.010.020.030.040.050.0

’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	+1.0 kn	−13%	+0%	−27%	+71%	1.0 kn faster, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.4 kn	+7%	+1%	−24%	+33%	0.4 kn slower, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.6 kn	−15%	−7%	−4%	−25%	0.6 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2021→2022	+1.6 kn	−1%	+29%	−5%	−40%	1.6 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2020→2021	−0.8 kn	−1%	−15%	+50%	+4%	0.8 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.7 kn	−5%	+33%	−44%	+68%	1.7 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2018→2019	+0.6 kn	−10%	+3%	+44%	+31%	0.6 kn faster, fuel per mile down 10%; 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	Canship Ugland Ltd	3,564	11,401	14,353	1,765	8.1	248	40.3	–
2024	Canship Ugland Ltd	5,623	18,029	19,778	2,780	7.1	284	23.6	–
2023	not published	6,865	22,010	25,864	3,450	7.5	265	17.8	–
2022	not published	8,426	27,015	27,078	3,942	6.9	311	23.7	–
2021	not published	8,962	28,732	28,446	5,410	5.3	315	39.3	–
2020	not published	6,004	19,248	18,955	3,084	6.1	317	37.7	–
2019	not published	11,310	36,258	33,828	7,721	4.4	334	22.5	–
2018	not published	8,726	27,977	23,551	6,126	3.8	371	17.1	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Canship Ugland Ltd	40.3	7.95	+407%	1,575 of 1,665	DNV	B+C
2024	Canship Ugland Ltd	23.6	8.06	+192%	1,576 of 1,787	DNV	A+B+C
2023	not published	17.8	8.44	+111%	1,492 of 1,797	DNV	A+B+C
2022	not published	23.7	8.51	+178%	1,747 of 1,961	DNV	B
2021	not published	39.3	8.86	+344%	1,692 of 1,789	DNV	B
2020	not published	37.7	9.03	+318%	1,777 of 1,870	DNV	B
2019	not published	22.5	8.83	+155%	1,681 of 1,919	DNV	B
2018	not published	17.1	8.86	+93%	1,462 of 1,779	DNV	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.