Navalyze · Chemical tanker · Ship

PROTEUS

IMO: 9864368
Type: Chemical tanker
Average cargo carried: 24,112 t
Port of registry: Majuro
Technical efficiency: EEXI 4.19 g CO₂/t·nm

ISM company (DoC holder) in 2025: Empire Navigation Inc

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 24,112 t of cargo on average.

Fuel per mile

100.8 kg/nm

Chemical tanker median 79.7 kg/nm (+26%)

CO₂ per transport work (cargo)

13.17

g CO₂/t·nm · Chemical tanker median 15.04 (−12%)

Average speed

10.9 kn

Chemical tanker median 11.1 kn (−2%)

Fuel per day at sea

26.3 t/day

Fuel consumed

622 t

CO₂ emitted

1,959 t

1,989 t CO₂eq incl. CH₄ and N₂O

Distance sailed

6,168 nm

CO₂ ÷ CO₂ per mile

Time at sea

567 h

24 days, 6% of the year

Within the chemical tanker fleet, 2025

Set against all 1,460 chemical 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 100.8 kg/nm · median 79.7 (+26%)

52.8Ranks 1,186 of 1,460, lowest first111.0

Average speedThis ship 10.9 kn · median 11.1 (−2%)

8.8Faster than 44% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 13.17 g CO₂/t·nm · median 15.04 (−12%)

7.93Ranks 596 of 1,460, lowest first40.17

Middle 80% of shipsMiddle 50%Chemical 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 ports52%
From the EU36%
Into the EU5%
At berth in the EU8%

46% of this ship's CO₂ falls under the EU ETS (901 t).

Fuel burned laden

–

Not reported

CO₂ at berth

7.9%

Alongside in EU ports

Methane (CH₄)

0.0 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 Chemical tanker median is the middle ship of all chemical 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

PROTEUS
Chemical tanker median

75.0100.0125.0150.0175.0

’202020’212021’222022’232023’252025

Average speed, kn

PROTEUS
Chemical tanker median

10.010.511.011.5

’202020’212021’222022’232023’252025

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

PROTEUS
Chemical tanker median

0.010.020.030.040.0

’202020’212021’222022’232023’252025

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2023→2025	−0.2 kn	−41%	−42%	−24%	−63%	Same speed, fuel per mile down 41%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.0 kn	+38%	+38%	−22%	+238%	Same speed, fuel per mile up 38%; worse than speed alone explains (fouling, weather, loading or trade).
2021→2022	+0.1 kn	+52%	+53%	−8%	−22%	Same speed, fuel per mile up 52%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.9 kn	−18%	−10%	−74%	+37%	0.9 kn faster, fuel per mile down 18%; better than speed alone explains (hull, engine 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	Empire Navigation Inc	622	1,959	6,168	567	10.9	100.8	13.17	–
2023	not published	1,382	4,321	8,146	737	11.1	169.7	35.22	–
2022	not published	1,276	4,002	10,406	936	11.1	122.7	10.43	–
2021	not published	915	2,856	11,309	1,026	11.0	80.9	13.45	–
2020	not published	4,241	13,264	42,821	4,260	10.1	99.0	9.82	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	Empire Navigation Inc	13.17	15.04	−12%	596 of 1,460	DNV	B
2023	not published	35.22	16.23	+117%	1,099 of 1,314	Lloyd's Register	B
2022	not published	10.43	16.06	−35%	255 of 1,409	DNV	B
2021	not published	13.45	16.69	−19%	447 of 1,343	DNV	B
2020	not published	9.82	16.16	−39%	167 of 1,312	ABS	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Chemical 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 chemical 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.