Navalyze · Oil tanker · Ship

ZIRCONE

IMO: 9010929
Type: Oil tanker
Average cargo carried: 3,998 t
Flag (estimated): Cyprus
Port of registry: Limassol
Technical efficiency: EIV 12.70 g CO₂/t·nm
Ice class: IA
Former names: ZIRCON

ISM company (DoC holder) in 2025: Welton Enterprises OU

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 3,512 t of cargo on average.

Fuel kg/nm

72.1

Oil tanker median 140 kg/nm (−48%)

CO₂ per transport work (cargo)

63.9

g CO₂/t·nm · Oil tanker median 8.86 (+622%)

Average speed

3.3 kn

Oil tanker median 9.8 kn (−66%)

Fuel per day at sea

5.6 t/day

Fuel consumed

1,732 t

CO₂ emitted

5,393 t

Distance sailed

24,017 nm

CO₂ ÷ CO₂ per mile

Time at sea

7,365 h

307 days, 84% 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 65.2 kg/nm · median 129 (−49%)

76.1Ranks 102 of 1,665, lowest first191

Average speedThis ship 8.4 kn · median 10.7 (−21%)

8.0Faster than 12% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 51.4 g CO₂/t·nm · median 7.95 (+547%)

4.51Ranks 1,612 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 ports95%
From the EU0%
Into the EU0%
At berth in the EU5%

Fuel burned laden

–

Not reported

CO₂ at berth

263 t

4.9% 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

ZIRCONE
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

ZIRCONE
Oil tanker median

2.55.07.510.012.5

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

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

ZIRCONE
Oil tanker median

0.020.040.060.080.0100

’182018’202020’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−4.1 kn	+4%	−30%	−37%	+10%	4.1 kn slower, fuel per mile up 4%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	+8.9 kn	−31%	+135%	+24%	−23%	8.9 kn faster, fuel per mile down 31%; better than speed alone explains (hull, engine or trade).
2022→2023	−5.3 kn	−5%	−61%	+0%	−30%	5.3 kn slower, fuel per mile down 5%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.7 kn	−25%	−18%	+20%	–	0.7 kn faster, fuel per mile down 25%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.3 kn	+3%	+7%	+28%	–	Same speed, fuel per mile up 3%; in line with the speed change.
2019→2020	+4.9 kn	+7%	+182%	−19%	–	4.9 kn faster, fuel per mile up 7%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.3 kn	+60%	+48%	−22%	–	Same speed, fuel per mile up 60%; worse than speed alone explains (fouling, weather, loading or trade).

Part-year reports are left out of these comparisons. 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
2025part-year	Welton Enterprises OU	301	949	5,821	674	8.6	51.7	31.1	–
2025	FB Trade DWC-LLC	1,207	3,806	18,507	2,201	8.4	65.2	51.4	–
2024	Welton Enterprises OU	1,835	5,715	29,292	2,348	12.5	62.6	46.8	–
2023	not published	2,153	6,720	23,574	6,463	3.6	91.3	61.0	–
2022	not published	2,259	7,056	23,565	2,635	8.9	95.8	86.7	–
2021	not published	2,512	7,827	19,604	2,405	8.2	128	104	–
2020	not published	1,900	5,918	15,326	1,948	7.9	124	87.5	–
2019	not published	2,178	6,782	18,829	6,270	3.0	116	93.6	–
2018	not published	1,732	5,393	24,017	7,365	3.3	72.1	63.9	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025part-year	Welton Enterprises OU	–	–	–	–	RINA	A
2025	FB Trade DWC-LLC	51.4	7.95	+547%	1,612 of 1,665	RINA	A
2024	Welton Enterprises OU	46.8	8.06	+480%	1,726 of 1,787	RINA	A
2023	not published	61.0	8.44	+623%	1,768 of 1,797	RINA	A
2022	not published	86.7	8.51	+918%	1,949 of 1,961	RINA	A
2021	not published	–	–	–	–	RINA	A
2020	not published	87.5	9.03	+869%	1,868 of 1,870	RINA	A
2019	not published	–	–	–	–	RINA	A
2018	not published	63.9	8.86	+622%	1,754 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.