Chemical tanker · Malta flag · built 2007

BOMAR SEDNA: CO₂ emissions 2018–2025

IMO 9383651 EU ETS8 reporting years

CO₂ reported 2025: 5,409 t
Fuel burned: 1,707 t
Distance: 39,182 nm
Time at sea: 4,441 h
Emitted at berth: 7% of total
Share of year under way: 51%
Gross tonnage: 5,713

BOMAR SEDNA against its type

Built in 2007, it is 3 years older than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 5,713 gross tonnage it is smaller than 95% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 218 chemical tankers here under the Malta flag, 9.3% of the 2,344 on the register. Its MRV returns name it BOMAR SEDNA for 2018–2021, W-WEST for 2022–2023 and W WEST for 2024–2025. The returns for 2018–2025 all give Valletta as port of registry.

Its 5,409 t of CO₂ for 2025 is close to the median of 5,533 t among the 1,483 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 138.0 kg CO₂, 45% below the type median of 250.2 kg. It logged 4,441 hours at sea against a median of 2,109 hours for its type that year. 6.7% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2021 (7,194 t) and the lowest 2022 (4,463 t). Its efficiency percentile within the type went from 94 in 2018 to 93 in 2025 (lower is more efficient). Of the 6 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.

Emissions by year2018–2025

Year	CO₂ (t)	Fuel (t)	Distance (nm)	At sea (h)	At berth (t)	kg CO₂/nm	EEOI	Percentile
2025	5,409	1,707	39,182	4,441	365	138.0	40.2	93
2024	6,057	1,922	40,406	5,114	414	149.9	45.0	94
2023	5,430	1,722	44,254	4,361	405	122.7	29.4	81
2022	4,463	1,420	29,169	3,021	355	153.0	54.9	98
2021	7,194	2,276	47,725	4,951	688	150.7	44.0	94
2020	7,087	2,246	50,905	5,348	573	139.2	41.9	92
2019	6,612	2,099	42,435	6,356	926	155.8	47.4	96
2018	5,657	1,798	39,546	5,678	579	143.0	47.1	94

Vessel particulars

IMO number: 9383651
Previously reported as: W-WEST, W WEST
Ship type: Chemical tanker
Gross tonnage: 5,713
Length overall: 101.0 m
Year built: 2007
Flag state: Malta per EU MRV 2025
Port of registry: Valletta MRV 2025
Technical efficiency (design): EEXI (13.8 gCO₂/t·nm)
Verifier: DNV, Germany
Accreditation: VS-16026-01
Compliance document issued: 2026-02-27
Compliance document expires: 2027-06-30

Efficiency against its own type2025

Position 1,256 of 1,348 qualifying chemical tankers by EEOI, at the 93rd percentile. The dashed line is the type median, 14.4; this vessel reported 40.2.

EEOI divides emissions by transport work, which for this vessel and year was 134,443,202 tonne-miles over 39,182 nautical miles.

Reported CO₂ by year

Reported CO₂ in 2025 was 4.4% lower than in 2018, for EU/EEA voyages only.

From 2024 to 2025, emissions fell 10.7% while distance sailed fell 3.0%and CO₂ per nautical mile fell 7.9%.That points mainly to how efficiently it sailed, rather than the other.

Where the 2025 emissions occurred

Methane, nitrous oxide and EU ETS2025

Total CO₂ equivalent: 5,492 t
Methane (CH₄): 0.09 t
Nitrous oxide (N₂O): 0.31 t
Under EU ETS: 4,561 t, 84% of total

Sources and how to read this

Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
Vessel particulars: Wikidata (CC0) and Wikimedia Commons.

This page draws on 8 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, a sanctions listing and US port state inspections.

Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.