Chemical tanker · Portugal flag · built 2000
THEMSESTERN: CO₂ emissions 2018–2024
IMO 9183843 MMSI 629009576EU ETS7 reporting years
- CO₂ reported 2024
- 9,974 t
- Fuel burned
- 3,159 t
- Distance
- 32,857 nm
- Time at sea
- 3,158 h
- Emitted at berth
- 17% of total
- Share of year under way
- 36%
- Gross tonnage
- 14,400
THEMSESTERN against its type
Built in 2000, it is 10 years older than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 14,400 gross tonnage it is smaller than 63% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 71 chemical tankers here under the Portugal flag, 3.0% of the 2,344 on the register. The same builder is recorded for 75 other vessels here, 3 of them chemical tankers. The returns for 2018–2024 all give Madeira as port of registry.
Its 9,974 t of CO₂ for 2024 is 1.7 times the median of 5,830 t among the 1,451 chemical tankers on this register that reported for 2024. Per nautical mile it emitted 303.6 kg CO₂, 20% above the type median of 253.5 kg. It logged 3,158 hours at sea against a median of 2,177 hours for its type that year. 16.7% of its 2024 emissions were at berth; the median for chemical tankers was 5.9%. Across 7 years with reported emissions, the highest was 2018 (14,560 t) and the lowest 2023 (9,176 t). Its efficiency percentile within the type went from 86 in 2018 to 80 in 2024 (lower is more efficient). Of the 2 comparable vessels listed below with a 2024 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2024
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2024 | 9,974 | 3,159 | 32,857 | 3,158 | 1,662 | 303.6 | 29.9 | 80 |
| 2023 | 9,176 | 2,898 | 28,529 | 2,760 | 1,522 | 321.6 | 30.9 | 82 |
| 2022 | 11,505 | 3,639 | 37,263 | 4,360 | 1,933 | 308.8 | 28.1 | 81 |
| 2021 | 11,930 | 3,721 | 38,657 | 3,878 | 1,617 | 308.6 | 31.1 | 84 |
| 2020 | 12,359 | 3,855 | 43,004 | 4,857 | 1,303 | 287.4 | 27.8 | 81 |
| 2019 | 14,227 | 4,512 | 51,303 | 6,682 | 1,478 | 277.3 | 30.1 | 82 |
| 2018 | 14,560 | 4,625 | 48,849 | 6,625 | 977 | 298.1 | 34.0 | 86 |
Vessel particulars
- IMO number
- 9183843
- MMSI
- 629009576
- Call sign
- C5J678
- Ship type
- Chemical tanker
- Gross tonnage
- 14,400
- Length overall
- 162.0 m
- Beam
- 28.0 m
- Year built
- 2000
- Flag state
- Portugal per EU MRV 2024
- Builder
- Stocznia Gdynia
- Port of registry
- Madeira MRV 2024
- Ice class
- IA
- Technical efficiency (design)
- EEXI (7.04 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2025-02-05
- Compliance document expires
- 2026-06-30
Efficiency against its own type2024
Position 961 of 1,194 qualifying chemical tankers by EEOI, at the 80th percentile. The dashed line is the type median, 15.9; this vessel reported 29.9.
EEOI divides emissions by transport work, which for this vessel and year was 333,130,928 tonne-miles over 32,857 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2024 was 31.5% lower than in 2018, for EU/EEA voyages only.
From 2023 to 2024, emissions rose 8.7% while distance sailed rose 15.2%and CO₂ per nautical mile fell 5.6%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2024 emissions occurred
Methane, nitrous oxide and EU ETS2024
- Total CO₂ equivalent
- 10,129 t
- Methane (CH₄)
- 0.16 t
- Nitrous oxide (N₂O)
- 0.57 t
- Under EU ETS
- 9,838 t, 99% of total
Observed movementsAIS · Norwegian waters
- First seen
- 19 Apr 2026
- Last seen
- 13 May 2026
- Days observed
- 3
- Positions
- 169
- Median speed
- 11.8 kn
Its recorded positions span 69.9°N to 71.0°N and 15.5°E to 19.1°E.
14 hourly points from 169 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 |
| 2023 | DNV | Germany |
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 2018–2024, 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, 5 of 5 vessel particulars and AIS movements in Norwegian waters. Not found in the sources for this vessel: 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.