Navalyze · Oil tanker · Ship

HISTRIA DIONE

IMO: 9800805
Type: Oil tanker
Average cargo carried: 17,146 t
Flag (estimated): Liberia
Port of registry: Monrovia
Technical efficiency: EEXI 4.64 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 17,146 t of cargo on average.

Fuel kg/nm

76.3

Oil tanker median 129 kg/nm (−41%)

CO₂ per transport work (cargo)

14.1

g CO₂/t·nm · Oil tanker median 7.95 (+78%)

Average speed

9.1 kn

Oil tanker median 10.7 kn (−15%)

Fuel per day at sea

16.6 t/day

Fuel consumed

1,555 t

CO₂ emitted

4,940 t

5,016 t CO₂eq incl. CH₄ and N₂O

Distance sailed

20,375 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,243 h

93 days, 26% 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 76.3 kg/nm · median 129 (−41%)

76.1Ranks 171 of 1,665, lowest first191

Average speedThis ship 9.1 kn · median 10.7 (−15%)

8.0Faster than 18% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 14.1 g CO₂/t·nm · median 7.95 (+78%)

4.51Ranks 1,265 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 ports44%
From the EU16%
Into the EU23%
At berth in the EU17%

80% of this ship's CO₂ falls under the EU ETS (3,975 t).

Fuel burned laden

–

Not reported

CO₂ at berth

833 t

16.9% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+76 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 DIONE
Oil tanker median

60.080.0100.0120.0140.0

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

Average speed, kn

HISTRIA DIONE
Oil tanker median

9.09.510.010.511.0

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

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

HISTRIA DIONE
Oil tanker median

6.08.010.012.014.016.0

’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	−0.9 kn	−4%	−13%	−37%	−5%	0.9 kn slower, fuel per mile down 4%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.7 kn	+3%	−4%	−3%	+34%	0.7 kn slower, fuel per mile up 3%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.5 kn	+6%	+10%	−0%	−20%	0.5 kn faster, fuel per mile up 6%; in line with the speed change.
2021→2022	+0.0 kn	+13%	+13%	−25%	+63%	Same speed, fuel per mile up 13%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−0.7 kn	+6%	−1%	+229%	+10%	0.7 kn slower, fuel per mile up 6%; 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	1,555	4,940	20,375	2,243	9.1	76.3	14.1	–
2024	Histria Shipmanagement Srl	2,548	8,061	32,129	3,223	10.0	79.3	14.9	–
2023	not published	2,536	8,027	33,052	3,096	10.7	76.7	11.1	–
2022	not published	2,403	7,580	33,097	3,231	10.2	72.6	13.9	–
2021	not published	2,823	8,860	43,917	4,286	10.2	64.3	8.50	–
2020	not published	810	2,552	13,337	1,220	10.9	60.7	7.75	–

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	14.1	7.95	+78%	1,265 of 1,665	DNV	A
2024	Histria Shipmanagement Srl	14.9	8.06	+85%	1,424 of 1,787	DNV	A
2023	not published	11.1	8.44	+32%	1,227 of 1,797	DNV	A
2022	not published	13.9	8.51	+63%	1,494 of 1,961	DNV	A
2021	not published	8.50	8.86	−4%	843 of 1,789	DNV	A
2020	not published	7.75	9.03	−14%	727 of 1,870	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.