Navalyze · Chemical tanker · Ship

W WEST

IMO: 9383651
Type: Chemical tanker
Average cargo carried: 3,431 t
Flag (estimated): Malta
Port of registry: Valletta
Technical efficiency: EEXI 13.80 g CO₂/t·nm
Former names: BOMAR SEDNA, W-WEST

ISM company (DoC holder) in 2025: Borealis Denizcilik A.S

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 3,431 t of cargo on average.

Fuel kg/nm

43.6

Chemical tanker median 79.7 kg/nm (−45%)

CO₂ per transport work (cargo)

40.2

g CO₂/t·nm · Chemical tanker median 15.0 (+167%)

Average speed

8.8 kn

Chemical tanker median 11.1 kn (−21%)

Fuel per day at sea

9.2 t/day

Fuel consumed

1,707 t

CO₂ emitted

5,409 t

5,492 t CO₂eq incl. CH₄ and N₂O

Distance sailed

39,182 nm

CO₂ ÷ CO₂ per mile

Time at sea

4,441 h

185 days, 51% 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 kg/nmThis ship 43.6 kg/nm · median 79.7 (−45%)

52.8Ranks 39 of 1,460, lowest first111

Average speedThis ship 8.8 kn · median 11.1 (−21%)

8.8Faster than 10% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 40.2 g CO₂/t·nm · median 15.0 (+167%)

7.93Ranks 1,315 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical 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 ports62%
From the EU18%
Into the EU14%
At berth in the EU7%

84% of this ship's CO₂ falls under the EU ETS (4,561 t).

Fuel burned laden

–

Not reported

CO₂ at berth

365 t

6.8% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+83 t

+1.5% CO₂eq on top of CO₂ alone, 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 kg/nm

W WEST
Chemical tanker median

20.040.060.080.0100.0

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

Average speed, kn

W WEST
Chemical tanker median

6.08.010.012.0

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

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

W WEST
Chemical tanker median

10.020.030.040.050.060.0

’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	+0.9 kn	−8%	+2%	−3%	−11%	0.9 kn faster, fuel per mile down 8%; better than speed alone explains (hull, engine or trade).
2023→2024	−2.2 kn	+22%	−5%	−9%	+53%	2.2 kn slower, fuel per mile up 22%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.4 kn	−20%	−16%	+52%	−46%	0.4 kn faster, fuel per mile down 20%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.1 kn	+2%	+3%	−39%	+25%	Same speed, fuel per mile up 2%; in line with the speed change.
2020→2021	+0.1 kn	+8%	+9%	−6%	+5%	Same speed, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+2.8 kn	−11%	+28%	+20%	−12%	2.8 kn faster, fuel per mile down 11%; better than speed alone explains (hull, engine or trade).
2018→2019	−0.3 kn	+9%	+4%	+7%	+1%	Same speed, fuel per mile up 9%; 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	Borealis Denizcilik A.S	1,707	5,409	39,182	4,441	8.8	43.6	40.2	–
2024	Borealis Denizcilik A.S	1,922	6,057	40,406	5,114	7.9	47.6	45.1	–
2023	not published	1,722	5,430	44,254	4,361	10.1	38.9	29.5	–
2022	not published	1,420	4,463	29,169	3,021	9.7	48.7	54.9	–
2021	not published	2,276	7,194	47,725	4,951	9.6	47.7	44.0	–
2020	not published	2,246	7,087	50,905	5,348	9.5	44.1	41.9	–
2019	not published	2,099	6,612	42,435	6,356	6.7	49.5	47.4	–
2018	not published	1,798	5,657	39,546	5,678	7.0	45.5	47.1	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025	Borealis Denizcilik A.S	40.2	15.0	+167%	1,315 of 1,460	DNV	B+C
2024	Borealis Denizcilik A.S	45.1	16.7	+169%	1,170 of 1,274	DNV	B
2023	not published	29.5	16.2	+81%	1,017 of 1,314	DNV	B
2022	not published	54.9	16.1	+242%	1,360 of 1,409	DNV	B
2021	not published	44.0	16.7	+164%	1,228 of 1,343	DNV	B
2020	not published	41.9	16.2	+159%	1,187 of 1,312	DNV	B
2019	not published	47.4	17.3	+174%	1,226 of 1,321	DNV	B
2018	not published	47.1	17.1	+175%	1,181 of 1,294	DNV	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.