Navalyze · Oil tanker · Ship

HISTRIA DIONE

IMO: 9800805
Type: Oil tanker
Average cargo carried: 17,146 t
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 per mile

76.3 kg/nm

Oil tanker median 128.5 kg/nm (−41%)

CO₂ per transport work (cargo)

14.14

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 per mileThis ship 76.3 kg/nm · median 128.5 (−41%)

76.1Ranks 171 of 1,665, lowest first190.8

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

4.51Ranks 1,265 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 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

16.9%

Alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.015

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

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	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Histria Shipmanagement Srl	1,555	4,940	20,375	2,243	9.1	76.3	14.14	–
2024	Histria Shipmanagement Srl	2,548	8,061	32,129	3,223	10.0	79.3	14.89	–
2023	not published	2,536	8,027	33,052	3,096	10.7	76.7	11.12	–
2022	not published	2,403	7,580	33,097	3,231	10.2	72.6	13.89	–
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	14.14	7.95	+78%	1,265 of 1,665	DNV	A
2024	Histria Shipmanagement Srl	14.89	8.06	+85%	1,424 of 1,787	DNV	A
2023	not published	11.12	8.44	+32%	1,227 of 1,797	DNV	A
2022	not published	13.89	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.