Navalyze · Oil tanker · Ship

DILIGENT WARRIOR

IMO: 9750050
Type: Oil tanker
Average cargo carried: 124,959 t
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 per mile

156.0 kg/nm

Oil tanker median 128.5 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 per mileThis ship 156.0 kg/nm · median 128.5 (+21%)

76.1Ranks 1,262 of 1,665, lowest first190.8

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 first27.66

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 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

9.8%

Alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

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

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	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Polembros Shipping Ltd	3,747	11,766	24,021	2,525	9.5	156.0	3.92	–
2024	Polembros Shipping Ltd	3,688	11,544	25,133	2,479	10.1	146.8	5.17	–
2023	not published	4,248	13,346	29,613	2,779	10.7	143.5	4.78	–
2022	not published	5,842	18,323	41,131	4,387	9.4	142.0	5.49	–
2021	not published	883	2,792	6,360	688	9.2	138.9	4.16	–
2020	not published	2,573	8,032	17,825	1,567	11.4	144.3	7.33	–
2019	not published	3,736	11,698	24,459	2,358	10.4	152.7	5.76	–
2018	not published	5,193	16,214	35,625	3,332	10.7	145.8	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.