Navalyze · Oil tanker · Ship

HARMONIC

IMO: 9819868
Type: Oil tanker
Average cargo carried: 66,969 t
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEDI 2.68 g CO₂/t·nm

ISM company (DoC holder) in 2025: Nereus Shipping SA

Report year

2020 at a glance

From the 2020 THETIS-MRV report. Carries about 72,133 t of cargo on average.

Fuel kg/nm

125

Oil tanker median 134 kg/nm (−7%)

CO₂ per transport work (cargo)

5.41

g CO₂/t·nm · Oil tanker median 9.03 (−40%)

Average speed

11.5 kn

Oil tanker median 11.0 kn (+5%)

Fuel per day at sea

34.5 t/day

Fuel consumed

7,710 t

CO₂ emitted

24,127 t

Distance sailed

61,825 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,357 h

223 days, 61% 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 119 kg/nm · median 129 (−8%)

76.1Ranks 659 of 1,665, lowest first191

Average speedThis ship 12.3 kn · median 10.7 (+15%)

8.0Faster than 94% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 5.56 g CO₂/t·nm · median 7.95 (−30%)

4.51Ranks 358 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2020

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 ports1%
From the EU40%
Into the EU52%
At berth in the EU7%

Fuel burned laden

–

Not reported

CO₂ at berth

1,756 t

7.3% 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

HARMONIC
Oil tanker median

110.0120.0130.0140.0150.0

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

Average speed, kn

HARMONIC
Oil tanker median

10.511.011.512.012.5

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

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

HARMONIC
Oil tanker median

4.06.08.010.0

’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	+0.2 kn	−9%	−7%	−5%	−44%	Same speed, fuel per mile down 9%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.6 kn	−8%	−3%	+429%	+80%	0.6 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2022→2023	−0.2 kn	+15%	+14%	−81%	−11%	Same speed, fuel per mile up 15%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.2 kn	−12%	−10%	+30%	+26%	Same speed, fuel per mile down 12%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.0 kn	+11%	+10%	−40%	−10%	Same speed, fuel per mile up 11%; 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	Nereus Shipping SA	5,473	17,160	46,086	3,737	12.3	119	5.56	–
2024	Nereus Shipping SA	6,300	19,772	48,475	4,009	12.1	130	9.87	–
2023	not published	1,289	4,023	9,163	794	11.5	141	5.47	–
2022	not published	5,888	18,393	48,284	4,117	11.7	122	6.14	–
2021	not published	5,142	16,146	37,247	3,236	11.5	138	4.86	–
2020	not published	7,710	24,127	61,825	5,357	11.5	125	5.41	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Nereus Shipping SA	5.56	7.95	−30%	358 of 1,665	EMICERT	A
2024	Nereus Shipping SA	9.87	8.06	+22%	1,156 of 1,787	EMICERT	A
2023	not published	5.47	8.44	−35%	320 of 1,797	EMICERT	A
2022	not published	6.14	8.51	−28%	490 of 1,961	EMICERT	A
2021	not published	4.86	8.86	−45%	202 of 1,789	EMICERT	A
2020	not published	5.41	9.03	−40%	269 of 1,870	EMICERT	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.