Navalyze · Oil tanker · Ship

ONYX 1

IMO: 9169782
Type: Oil tanker
Average cargo carried: 7,914 t
Flag (estimated): Sierra Leone
Port of registry: Freetown
Technical efficiency: EIV 16.14 g CO₂/t·nm
Ice class: IA
Former names: ONYX

Report year

2019 at a glance

From the 2019 THETIS-MRV report. Carries about 7,032 t of cargo on average.

Fuel kg/nm

85.8

Oil tanker median 138 kg/nm (−38%)

CO₂ per transport work (cargo)

38.0

g CO₂/t·nm · Oil tanker median 8.83 (+330%)

Average speed

8.1 kn

Oil tanker median 9.7 kn (−16%)

Fuel per day at sea

16.8 t/day

Fuel consumed

3,818 t

CO₂ emitted

11,892 t

Distance sailed

44,526 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,466 h

228 days, 62% of the year

Within the oil tanker fleet, 2023

Set against all 1,797 oil tanker ships with a full-year 2023 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 100 kg/nm · median 129 (−22%)

80.4Ranks 428 of 1,797, lowest first193

Average speedThis ship 12.7 kn · median 11.0 (+15%)

8.1Faster than 95% of oil tanker ships12.4

CO₂ per transport work (cargo)This ship 39.6 g CO₂/t·nm · median 8.44 (+369%)

4.78Ranks 1,714 of 1,797, lowest first25.5

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2019

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 ports94%
From the EU0%
Into the EU0%
At berth in the EU6%

Fuel burned laden

–

Not reported

CO₂ at berth

671 t

5.6% 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

ONYX 1
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

ONYX 1
Oil tanker median

4.06.08.010.012.014.0

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

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

ONYX 1
Oil tanker median

0.010.020.030.040.050.0

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

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2022→2023	+2.6 kn	+17%	+47%	−18%	−14%	2.6 kn faster, fuel per mile up 17%; better than speed alone explains (hull, engine or trade).
2021→2022	−0.4 kn	+1%	−3%	−1%	+20%	0.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.0 kn	−3%	−12%	−7%	+0%	1.0 kn slower, fuel per mile down 3%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+3.4 kn	+3%	+45%	−21%	+1%	3.4 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2018→2019	+3.2 kn	+38%	+130%	+41%	+50%	3.2 kn faster, fuel per mile up 38%; 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
2023	not published	2,663	8,329	26,562	2,085	12.7	100	39.6	–
2022	not published	2,782	8,758	32,449	3,212	10.1	85.8	46.1	–
2021	not published	2,792	8,693	32,810	3,110	10.5	85.1	38.5	–
2020	not published	3,088	9,619	35,102	3,046	11.5	88.0	38.4	–
2019	not published	3,818	11,892	44,526	5,466	8.1	85.8	38.0	–
2018	not published	1,957	6,100	31,541	6,459	4.9	62.0	25.4	–

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	39.6	8.44	+369%	1,714 of 1,797	RINA	A
2022	not published	46.1	8.51	+442%	1,896 of 1,961	RINA	A
2021	not published	38.5	8.86	+335%	1,691 of 1,789	RINA	A
2020	not published	38.4	9.03	+325%	1,782 of 1,870	RINA	A
2019	not published	38.0	8.83	+330%	1,823 of 1,919	RINA	A
2018	not published	25.4	8.86	+187%	1,626 of 1,779	RINA	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.