Navalyze · Oil tanker · Ship

HISTRIA GEMMA

IMO: 9436719
Type: Oil tanker
Average cargo carried: 18,682 t
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEXI 5.48 g CO₂/t·nm

ISM company (DoC holder) in 2025: Histria Shipmanagement Srl

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 18,682 t of cargo on average.

Fuel kg/nm

89.3

Oil tanker median 129 kg/nm (−31%)

CO₂ per transport work (cargo)

15.2

g CO₂/t·nm · Oil tanker median 7.95 (+91%)

Average speed

10.3 kn

Oil tanker median 10.7 kn (−4%)

Fuel per day at sea

22.0 t/day

Fuel consumed

2,934 t

CO₂ emitted

9,332 t

9,476 t CO₂eq incl. CH₄ and N₂O

Distance sailed

32,839 nm

CO₂ ÷ CO₂ per mile

Time at sea

3,202 h

133 days, 37% 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 89.3 kg/nm · median 129 (−31%)

76.1Ranks 310 of 1,665, lowest first191

Average speedThis ship 10.3 kn · median 10.7 (−4%)

8.0Faster than 37% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 15.2 g CO₂/t·nm · median 7.95 (+91%)

4.51Ranks 1,302 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions 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 ports56%
From the EU16%
Into the EU12%
At berth in the EU16%

86% of this ship's CO₂ falls under the EU ETS (8,030 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,484 t

15.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+144 t

+1.5% CO₂eq on top of CO₂ alone, 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 kg/nm

HISTRIA GEMMA
Oil tanker median

80.0100.0120.0140.0

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

Average speed, kn

HISTRIA GEMMA
Oil tanker median

7.08.09.010.011.0

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

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

HISTRIA GEMMA
Oil tanker median

5.010.015.020.025.0

’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	−0.6 kn	−13%	−18%	−17%	+7%	0.6 kn slower, fuel per mile down 13%; in line with the speed change.
2023→2024	+0.9 kn	+6%	+15%	−10%	−8%	0.9 kn faster, fuel per mile up 6%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.3 kn	+1%	+4%	+50%	+15%	0.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	+0.4 kn	+9%	+14%	−24%	+1%	0.4 kn faster, fuel per mile up 9%; in line with the speed change.
2020→2021	+0.8 kn	+3%	+13%	+15%	−7%	0.8 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2019→2020	+1.5 kn	−14%	+5%	+4%	−25%	1.5 kn faster, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.8 kn	+2%	−9%	+39%	−8%	0.8 kn slower, fuel per mile flat; 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	Histria Shipmanagement Srl	2,934	9,332	32,839	3,202	10.3	89.3	15.2	–
2024	Histria Shipmanagement Srl	4,082	12,843	39,645	3,638	10.9	103	14.2	–
2023	not published	4,299	13,626	44,113	4,401	10.0	97.5	15.5	–
2022	not published	2,848	8,912	29,465	3,037	9.7	96.7	13.5	–
2021	not published	3,440	10,789	38,779	4,168	9.3	88.7	13.3	–
2020	not published	2,895	9,072	33,721	3,952	8.5	85.8	14.4	–
2019	not published	3,224	10,094	32,462	4,618	7.0	99.3	19.2	–
2018	not published	2,290	7,182	23,429	2,985	7.8	97.7	20.7	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Histria Shipmanagement Srl	15.2	7.95	+91%	1,302 of 1,665	DNV	A
2024	Histria Shipmanagement Srl	14.2	8.06	+76%	1,406 of 1,787	DNV	A
2023	not published	15.5	8.44	+83%	1,438 of 1,797	DNV	A
2022	not published	13.5	8.51	+58%	1,477 of 1,961	DNV	A
2021	not published	13.3	8.86	+50%	1,308 of 1,789	DNV	A
2020	not published	14.4	9.03	+59%	1,386 of 1,870	DNV	A
2019	not published	19.2	8.83	+117%	1,620 of 1,919	DNV	A
2018	not published	20.7	8.86	+134%	1,546 of 1,779	DNV	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.