Navalyze · Oil tanker · Ship

ZAPPHIRE

IMO: 9391957
Type: Oil tanker
Average cargo carried: 19,397 t
Port of registry: Valletta
Technical efficiency: EIV 6.41 g CO₂/t·nm

ISM company (DoC holder) in 2025: 3M Shipping

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 19,397 t of cargo on average.

Fuel per mile

130.9 kg/nm

Oil tanker median 128.5 kg/nm (+2%)

CO₂ per transport work (cargo)

21.35

g CO₂/t·nm · Oil tanker median 7.95 (+169%)

Average speed

9.5 kn

Oil tanker median 10.7 kn (−11%)

Fuel per day at sea

30.0 t/day

Fuel consumed

5,043 t

CO₂ emitted

15,949 t

16,197 t CO₂eq incl. CH₄ and N₂O

Distance sailed

38,513 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,040 h

168 days, 46% 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 per mileThis ship 130.9 kg/nm · median 128.5 (+2%)

76.1Ranks 886 of 1,665, lowest first190.8

Average speedThis ship 9.5 kn · median 10.7 (−11%)

8.0Faster than 24% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 21.35 g CO₂/t·nm · median 7.95 (+169%)

4.51Ranks 1,422 of 1,665, lowest first27.66

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

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 ports55%
From the EU13%
Into the EU13%
At berth in the EU19%

87% of this ship's CO₂ falls under the EU ETS (13,873 t).

Fuel burned laden

81%

19% in ballast or unladen

CO₂ at berth

18.9%

Alongside in EU ports

Methane (CH₄)

0.3 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

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

ZAPPHIRE
Oil tanker median

120.0140.0160.0180.0

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

Average speed, kn

ZAPPHIRE
Oil tanker median

4.06.08.010.012.0

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

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

ZAPPHIRE
Oil tanker median

0.010.020.030.040.0

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

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	+0.8 kn	−3%	+7%	+8%	−7%	0.8 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.5 kn	−8%	−3%	+13%	−30%	0.5 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.4 kn	−0%	+6%	−4%	+14%	0.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	+0.0 kn	−18%	−18%	+23%	−19%	Same speed, fuel per mile down 18%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.6 kn	+28%	+39%	−12%	+26%	0.6 kn faster, fuel per mile up 28%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+2.5 kn	−22%	+19%	+31%	−19%	2.5 kn faster, fuel per mile down 22%; better than speed alone explains (hull, engine or trade).
2018→2019	−2.8 kn	+46%	−9%	−39%	–	2.8 kn slower, fuel per mile up 46%; 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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	3M Shipping	5,043	15,949	38,513	4,040	9.5	130.9	21.35	81%
2024part-year	SOCOMAR Srl	3,926	12,355	28,830	3,512	8.2	136.2	25.45	80%
2024	3M Shipping	4,798	15,099	35,571	4,105	8.7	134.9	23.07	79%
2023	not published	4,602	14,462	31,417	3,809	8.2	146.5	33.17	–
2022	not published	4,829	15,170	32,798	4,231	7.8	147.2	29.18	–
2021	not published	4,770	14,965	26,627	3,417	7.8	179.1	36.10	–
2020	not published	4,207	13,227	30,137	4,191	7.2	139.6	28.66	–
2019	not published	4,127	12,971	22,940	4,890	4.7	179.9	35.43	–
2018	not published	4,602	14,466	37,441	4,968	7.5	122.9	18,262,656.77	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	3M Shipping	21.35	7.95	+169%	1,422 of 1,665	Lloyd's Register	B+C
2024part-year	SOCOMAR Srl	–	–	–	–	Lloyd's Register	C
2024	3M Shipping	23.07	8.06	+186%	1,573 of 1,787	Lloyd's Register	–
2023	not published	33.17	8.44	+293%	1,678 of 1,797	Lloyd's Register	C
2022	not published	29.18	8.51	+243%	1,816 of 1,961	Lloyd's Register	C
2021	not published	36.10	8.86	+307%	1,683 of 1,789	Lloyd's Register	C
2020	not published	28.66	9.03	+217%	1,715 of 1,870	Lloyd's Register	C
2019	not published	35.43	8.83	+301%	1,817 of 1,919	Lloyd's Register	C
2018	not published	–	–	–	–	Lloyd's Register	C

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.