Navalyze · Oil tanker · Ship

DILIGENT WARRIOR

IMO: 9750050
Type: Oil tanker
Average cargo carried: 124,959 t
Flag (estimated): Greece
Port of registry: Andros
Technical efficiency: EEXI 2.90 g CO₂/t·nm

ISM company (DoC holder) in 2025: Polembros Shipping Ltd · part of Polembros

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 124,959 t of cargo on average.

Fuel kg/nm

156

Oil tanker median 129 kg/nm (+21%)

CO₂ per transport work (cargo)

3.92

g CO₂/t·nm · Oil tanker median 7.95 (−51%)

Average speed

9.5 kn

Oil tanker median 10.7 kn (−11%)

Fuel per day at sea

35.6 t/day

Fuel consumed

3,747 t

CO₂ emitted

11,766 t

11,950 t CO₂eq incl. CH₄ and N₂O

Distance sailed

24,021 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,525 h

105 days, 29% 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 (+21%)

76.1Ranks 1,262 of 1,665, lowest first191

Average speedThis ship 9.5 kn · median 10.7 (−11%)

8.0Faster than 23% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 3.92 g CO₂/t·nm · median 7.95 (−51%)

4.51Ranks 83 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 ports5%
From the EU11%
Into the EU74%
At berth in the EU10%

57% of this ship's CO₂ falls under the EU ETS (6,763 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,151 t

9.8% 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

+184 t

+1.6% 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

DILIGENT WARRIOR
Oil tanker median

120.0130.0140.0150.0160.0

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

Average speed, kn

DILIGENT WARRIOR
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

DILIGENT WARRIOR
Oil tanker median

2.04.06.08.010.0

’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	+6%	−0%	−4%	−24%	0.6 kn slower, fuel per mile up 6%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.6 kn	+2%	−3%	−15%	+8%	0.6 kn slower, fuel per mile up 2%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.3 kn	+1%	+15%	−28%	−13%	1.3 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	+0.2 kn	+2%	+4%	+547%	+32%	Same speed, fuel per mile up 2%; in line with the speed change.
2020→2021	−2.2 kn	−4%	−22%	−64%	−43%	2.2 kn slower, fuel per mile down 4%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.0 kn	−6%	+4%	−27%	+27%	1.0 kn faster, fuel per mile down 6%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.3 kn	+5%	+2%	−31%	+21%	Same speed, fuel per mile up 5%; 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	Polembros Shipping Ltd	3,747	11,766	24,021	2,525	9.5	156	3.92	–
2024	Polembros Shipping Ltd	3,688	11,544	25,133	2,479	10.1	147	5.17	–
2023	not published	4,248	13,346	29,613	2,779	10.7	144	4.78	–
2022	not published	5,842	18,323	41,131	4,387	9.4	142	5.49	–
2021	not published	883	2,792	6,360	688	9.2	139	4.16	–
2020	not published	2,573	8,032	17,825	1,567	11.4	144	7.33	–
2019	not published	3,736	11,698	24,459	2,358	10.4	153	5.76	–
2018	not published	5,193	16,214	35,625	3,332	10.7	146	4.77	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Polembros Shipping Ltd	3.92	7.95	−51%	83 of 1,665	DNV	A
2024	Polembros Shipping Ltd	5.17	8.06	−36%	325 of 1,787	DNV	A
2023	not published	4.78	8.44	−43%	180 of 1,797	DNV	A
2022	not published	5.49	8.51	−35%	343 of 1,961	DNV	A
2021	not published	4.16	8.86	−53%	100 of 1,789	DNV	A
2020	not published	7.33	9.03	−19%	634 of 1,870	EMICERT	A
2019	not published	5.76	8.83	−35%	376 of 1,919	EMICERT	A
2018	not published	4.77	8.86	−46%	237 of 1,779	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.