Navalyze · Chemical tanker · Ship

JBU ONYX

IMO: 9392999
Type: Chemical tanker
Average cargo carried: 18,627 t
Flag (estimated): South Korea
Port of registry: Jeju
Technical efficiency: EIV 11.51 g CO₂/t·nm

ISM company (DoC holder) in 2025: GREEN MARITIME CO., LTD.

Report year

2022 at a glance

From the 2022 THETIS-MRV report. Carries about 14,412 t of cargo on average.

Fuel kg/nm

105

Chemical tanker median 84.6 kg/nm (+24%)

CO₂ per transport work (cargo)

22.9

g CO₂/t·nm · Chemical tanker median 16.1 (+43%)

Average speed

8.4 kn

Chemical tanker median 11.1 kn (−24%)

Fuel per day at sea

21.0 t/day

Fuel consumed

701 t

CO₂ emitted

2,219 t

Distance sailed

6,711 nm

CO₂ ÷ CO₂ per mile

Time at sea

800 h

33 days, 9% of the year

Within the chemical tanker fleet, 2025

Set against all 1,460 chemical 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 62.5 kg/nm · median 79.7 (−22%)

52.8Ranks 318 of 1,460, lowest first111

Average speedThis ship 10.8 kn · median 11.1 (−3%)

8.8Faster than 41% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 10.5 g CO₂/t·nm · median 15.0 (−30%)

7.93Ranks 377 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2022

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 ports0%
From the EU25%
Into the EU66%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

190 t

8.5% 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 Chemical tanker median is the middle ship of all chemical tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

JBU ONYX
Chemical tanker median

40.060.080.0100.0120.0

’182018’222022’232023’242024’252025

Average speed, kn

JBU ONYX
Chemical tanker median

8.09.010.011.012.0

’182018’222022’232023’242024’252025

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

JBU ONYX
Chemical tanker median

5.010.015.020.025.0

’182018’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.3 kn	−14%	−16%	−59%	−31%	Same speed, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.6 kn	+40%	+31%	+170%	+62%	0.6 kn slower, fuel per mile up 40%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+3.3 kn	−50%	−30%	+52%	−59%	3.3 kn faster, fuel per mile down 50%; better than speed alone explains (hull, engine or trade).
2018→2022	−2.4 kn	+19%	−8%	−12%	+27%	2.4 kn slower, fuel per mile up 19%; worse than speed alone explains (fouling, weather, loading 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	GREEN MARITIME CO., LTD.	705	2,196	11,271	1,043	10.8	62.5	10.5	100%
2024	GREEN MARITIME CO., LTD.	2,005	6,302	27,539	2,489	11.1	72.8	15.2	81%
2023	not published	531	1,674	10,185	868	11.7	52.1	9.38	–
2022	not published	701	2,219	6,711	800	8.4	105	22.9	–
2018	not published	669	2,104	7,627	703	10.8	87.7	18.1	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	GREEN MARITIME CO., LTD.	10.5	15.0	−30%	377 of 1,460	Verifavia	C
2024	GREEN MARITIME CO., LTD.	15.2	16.7	−9%	569 of 1,274	Verifavia	C
2023	not published	9.38	16.2	−42%	155 of 1,314	Korean Register	–
2022	not published	22.9	16.1	+43%	999 of 1,409	Korean Register	C
2018	not published	18.1	17.1	+6%	707 of 1,294	ABS	C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Chemical 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 chemical 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.