Navalyze · Oil tanker · Ship

PROPONTIS

IMO: 9305623
Type: Oil tanker
Average cargo carried: 33,886 t
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 3.28 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: Tsakos Shipping & Trading S.A. · part of Tsakos

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 63,310 t of cargo on average.

Fuel kg/nm

210

Oil tanker median 129 kg/nm (+63%)

CO₂ per transport work (cargo)

10.5

g CO₂/t·nm · Oil tanker median 8.44 (+24%)

Average speed

10.5 kn

Oil tanker median 11.0 kn (−5%)

Fuel per day at sea

53.2 t/day

Fuel consumed

8,894 t

CO₂ emitted

28,114 t

Distance sailed

42,292 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,015 h

167 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 kg/nmThis ship 156 kg/nm · median 129 (+22%)

76.1Ranks 1,264 of 1,665, lowest first191

Average speedThis ship 10.8 kn · median 10.7 (+1%)

8.0Faster than 53% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 14.3 g CO₂/t·nm · median 7.95 (+80%)

4.51Ranks 1,272 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2023

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 ports9%
From the EU28%
Into the EU55%
At berth in the EU8%

Fuel burned laden

–

Not reported

CO₂ at berth

2,190 t

7.8% 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

PROPONTIS
Oil tanker median

125.0150.0175.0200.0225.0

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

Average speed, kn

PROPONTIS
Oil tanker median

9.010.011.012.0

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

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

PROPONTIS
Oil tanker median

6.08.010.012.014.016.0

’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	+1.1 kn	−14%	−4%	−28%	−0%	1.1 kn faster, fuel per mile down 14%; better than speed alone explains (hull, engine or trade).
2023→2024	−0.8 kn	−14%	−20%	+37%	+36%	0.8 kn slower, fuel per mile down 14%; in line with the speed change.
2022→2023	+0.3 kn	+24%	+27%	+46%	−12%	0.3 kn faster, fuel per mile up 24%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.7 kn	−4%	+4%	−22%	+9%	0.7 kn faster, fuel per mile down 4%; better than speed alone explains (hull, engine or trade).
2020→2021	+0.2 kn	−5%	−3%	−28%	−5%	Same speed, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2019→2020	−0.8 kn	+1%	−7%	−6%	+13%	0.8 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−1.5 kn	−3%	−15%	+1%	−20%	1.5 kn slower, fuel per mile down 3%; 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	Tsakos Shipping & Trading S.A.	6,482	20,114	41,508	3,837	10.8	156	14.3	47%
2024	Tsakos Shipping & Trading S.A.	10,529	33,067	57,912	5,976	9.7	182	14.3	51%
2023	not published	8,894	28,114	42,292	4,015	10.5	210	10.5	–
2022	not published	4,927	15,651	28,948	2,830	10.2	170	11.9	–
2021	not published	6,508	20,542	36,894	3,880	9.5	176	10.9	–
2020	not published	9,455	29,793	50,934	5,481	9.3	186	11.5	–
2019	not published	9,973	31,473	54,116	5,362	10.1	184	10.2	–
2018	not published	10,159	32,045	53,568	4,627	11.6	190	12.7	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Tsakos Shipping & Trading S.A.	14.3	7.95	+80%	1,272 of 1,665	Lloyd's Register	A
2024	Tsakos Shipping & Trading S.A.	14.3	8.06	+78%	1,408 of 1,787	Lloyd's Register	A
2023	not published	10.5	8.44	+24%	1,166 of 1,797	Lloyd's Register	–
2022	not published	11.9	8.51	+40%	1,369 of 1,961	Lloyd's Register	–
2021	not published	10.9	8.86	+23%	1,145 of 1,789	Lloyd's Register	–
2020	not published	11.5	9.03	+27%	1,199 of 1,870	Lloyd's Register	–
2019	not published	10.2	8.83	+15%	1,165 of 1,919	Lloyd's Register	–
2018	not published	12.7	8.86	+43%	1,279 of 1,779	Lloyd's Register	–

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.