Chemical tanker · Norway flag · built 2020
BOW OPTIMA: CO₂ emissions 2020–2025
IMO 9818541 EU ETS6 reporting years
- CO₂ reported 2025
- 2,140 t
- Fuel burned
- 681 t
- Time at sea
- 444 h
- Emitted at berth
- 4% of total
- Share of year under way
- 5%
- Gross tonnage
- 29,000
BOW OPTIMA against its type
Built in 2020, it is 10 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 29,000 gross tonnage it is larger than 67% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 95 chemical tankers here under the Norway flag, 4.1% of the 2,344 on the register. The same builder is recorded for 204 other vessels here, 11 of them chemical tankers. The returns for 2020–2025 all give Bergen as port of registry.
Its 2,140 t of CO₂ for 2025 is 61% below the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 368.1 kg CO₂, 47% above the type median of 250.2 kg. It logged 444 hours at sea against a median of 2,106 hours for its type that year. 4.5% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 6 years with reported emissions, the highest was 2022 (10,961 t) and the lowest 2025 (2,140 t). Its efficiency percentile within the type went from 21 in 2020 to 13 in 2024 (lower is more efficient). Of the 3 sister ships listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2020–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 2,140 | 681 | — | 444 | 96 | 368.1 | — | — |
| 2024 | 4,612 | 1,478 | 13,473 | 1,050 | 72 | 342.3 | 8.9 | 13 |
| 2023 | 3,090 | 973 | 8,718 | 638 | 327 | 354.4 | 9.9 | 16 |
| 2022 | 10,961 | 3,463 | 34,576 | 3,016 | 695 | 317.0 | 11.9 | 29 |
| 2021 | 6,133 | 1,934 | 17,249 | 1,472 | 1,124 | 355.6 | 10.8 | 19 |
| 2020 | 8,085 | 2,557 | 21,767 | 1,836 | 736 | 371.4 | 11.2 | 21 |
Vessel particulars
- IMO number
- 9818541
- Ship type
- Chemical tanker
- Gross tonnage
- 29,000
- Length overall
- 183.0 m
- Beam
- 32.0 m
- Year built
- 2020
- Flag state
- Norway per EU MRV 2025
- Builder
- Hudong-Zhonghua Shipbuilding
- Port of registry
- Bergen MRV 2025
- Technical efficiency (design)
- EEXI (4.46 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-03-19
- Compliance document expires
- 2027-06-30
Efficiency against its own type2024
Position 158 of 1,194 qualifying chemical tankers by EEOI, at the 13th percentile. The dashed line is the type median, 15.9; this vessel reported 8.9.
EEOI divides emissions by transport work, which for this vessel and year was 520,576,749 tonne-miles over 13,473 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 73.5% lower than in 2020, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 53.6% and CO₂ per nautical mile rose 7.5%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 2,173 t
- Methane (CH₄)
- 0.03 t
- Nitrous oxide (N₂O)
- 0.12 t
- Under EU ETS
- 1,240 t, 58% of total
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2020–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 6 MRV reporting years, an efficiency ranking and 5 of 5 vessel particulars. Not found in the sources for this vessel: AIS movements in Norwegian waters, a name history, a licensed photograph, 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.