Chemical tanker · Marshall Islands flag · built 2018
CHEM SELENIUM: CO₂ emissions 2018–2025
IMO 9817509 MMSI 538007832EU ETS7 reporting years
- CO₂ reported 2025
- 7,348 t
- Fuel burned
- 2,339 t
- Distance
- 39,404 nm
- Time at sea
- 3,531 h
- Emitted at berth
- 6% of total
- Share of year under way
- 40%
- Gross tonnage
- 12,075
CHEM SELENIUM against its type
Built in 2018, it is 8 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 12,075 gross tonnage it is smaller than 69% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 474 chemical tankers here under the Marshall Islands flag, 20.2% of the 2,344 on the register. Its MRV returns name it STREAM ARCTIC for 2018–2021 and CHEM SELENIUM for 2023–2025. The returns for 2018–2025 all give Majuro as port of registry.
Its 7,348 t of CO₂ for 2025 is 33% above the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 186.5 kg CO₂, 25% below the type median of 250.2 kg. It logged 3,531 hours at sea against a median of 2,106 hours for its type that year. 6.5% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 7 years with reported emissions, the highest was 2024 (8,423 t) and the lowest 2018 (1,602 t). Its efficiency percentile within the type went from 32 in 2018 to 48 in 2025 (lower is more efficient). Of the 5 comparable vessels listed below with a 2025 return, 0 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 | 7,348 | 2,339 | 39,404 | 3,531 | 474 | 186.5 | 14.0 | 48 |
| 2024 | 8,423 | 2,675 | 44,791 | 4,204 | 0 | 188.1 | 13.0 | 84 |
| 2023 | 3,982 | 1,260 | 23,113 | 1,651 | 353 | 172.3 | 14.9 | 85 |
| 2021 | 3,175 | 1,004 | 17,072 | 1,131 | 423 | 186.0 | 22.5 | 72 |
| 2020 | 5,076 | 1,611 | 23,643 | 1,704 | 260 | 214.7 | 8.4 | 7 |
| 2019 | 6,988 | 2,229 | 33,631 | 2,268 | 574 | 207.8 | 15.0 | 42 |
| 2018 | 1,602 | 512 | 8,843 | 666 | 159 | 181.1 | 12.8 | 32 |
Vessel particulars
- IMO number
- 9817509
- Previously reported as
- STREAM ARCTIC
- MMSI
- 538007832
- Ship type
- Chemical tanker
- Gross tonnage
- 12,075
- Length overall
- 146.5 m
- Beam
- 24.0 m
- Year built
- 2018
- Flag state
- Marshall Islands per EU MRV 2025
- Port of registry
- Majuro MRV 2025
- Home port
- Majuro
- Technical efficiency (design)
- EEDI (7.23 gCO₂/t·nm)
- Verifier
- Nippon Kaiji Kyokai, Japan
- Accreditation
- VS-21325-01
- Compliance document issued
- 2026-03-23
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 646 of 1,348 qualifying chemical tankers by EEOI, at the 48th percentile. The dashed line is the type median, 14.4; this vessel reported 14.0.
EEOI divides emissions by transport work, which for this vessel and year was 523,342,593 tonne-miles over 39,404 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 358.7% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2022, so the series has gaps.
From 2024 to 2025, emissions fell 12.8% while distance sailed fell 12.0%and CO₂ per nautical mile fell 0.8%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 7,463 t
- Methane (CH₄)
- 0.12 t
- Nitrous oxide (N₂O)
- 0.42 t
- Under EU ETS
- 4,395 t, 60% of total
Observed movementsAIS · Norwegian waters
- First seen
- 22 Jul 2025
- Last seen
- 09 Oct 2025
- Days observed
- 10
- Positions
- 535
- Median speed
- 10.2 kn
Its recorded positions span 58.0°N to 59.1°N and 4.5°E to 9.9°E.
310 hourly points from 535 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.
Positions recorded per month
Norwegian Coastal Administration open AIS, Norwegian waters only, 01 Jul 2025 to 27 Jul 2026. A gap means the vessel was not recorded here, not that it was idle or that a transponder was off.
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2019 | Nippon Kaiji Kyokai | Japan |
A change of verifier is not in itself a sign of anything being wrong.
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).
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 7 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars, AIS movements in Norwegian waters and a name history. Not found in the sources for this vessel: 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.