Gas carrier · Liberia flag · built 1999
ENIGMA: CO₂ emissions 2018–2025
IMO 9103398 EU ETS7 reporting years
- CO₂ reported 2025
- 1,420 t
- Fuel burned
- 445 t
- Time at sea
- 726 h
- Emitted at berth
- 9% of total
- Share of year under way
- 8%
- Gross tonnage
- 5,725
ENIGMA against its type
Built in 1999, it is 14 years older than the median gas carrier on this register, which was built in 2013 (530 vessels with a known build year). At 5,725 gross tonnage it is smaller than 97% of the other 525 gas carriers with a recorded tonnage. It is one of 131 gas carriers here under the Liberia flag, 19.0% of the 688 on the register. Its MRV returns name it GASCHEM WESER for 2018–2022 and ENIGMA for 2024–2025. The returns for 2018–2025 all give Monrovia as port of registry.
Its 1,420 t of CO₂ for 2025 is 76% below the median of 5,974 t among the 363 gas carriers on this register that reported for 2025. Per nautical mile it emitted 241.8 kg CO₂, close to the type median of 256.2 kg. It logged 726 hours at sea against a median of 1,943 hours for its type that year. 9.0% of its 2025 emissions were at berth; the median for gas carriers was 3.8%. Across 7 years with reported emissions, the highest was 2024 (1,952 t) and the lowest 2020 (234 t). Of the 3 comparable vessels listed below with a 2025 return, 3 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 | 1,420 | 445 | — | 726 | 127 | 241.8 | 162.1 | not ranked |
| 2024 | 1,952 | 621 | — | 907 | 104 | 200.1 | 126.3 | not ranked |
| 2022 | 593 | 189 | — | 358 | 30 | 166.4 | 108.4 | not ranked |
| 2021 | 560 | 177 | — | 362 | 22 | 173.4 | 125.4 | not ranked |
| 2020 | 234 | 74 | — | 118 | 12 | 160.5 | 105.9 | not ranked |
| 2019 | 315 | 101 | — | 278 | 16 | 201.6 | 355.9 | not ranked |
| 2018 | 457 | 146 | — | 352 | 22 | 161.7 | 106.7 | not ranked |
Vessel particulars
- IMO number
- 9103398
- Previously reported as
- GASCHEM WESER
- Ship type
- Gas carrier
- Gross tonnage
- 5,725
- Length overall
- 116.2 m
- Beam
- 17.2 m
- Year built
- 1999
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (19.44 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: transport work below the floor (2025)
- Verifier
- Bureau Veritas Certification France, France
- Accreditation
- 3-2047 rev. 4
- Compliance document issued
- 2026-03-18
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 211.1% higher than in 2018, for EU/EEA voyages only. No return is recorded for 2023, so the series has gaps.
From 2024 to 2025, emissions fell 27.2% and CO₂ per nautical mile rose 20.8%.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
- 1,442 t
- Methane (CH₄)
- 0.02 t
- Nitrous oxide (N₂O)
- 0.08 t
- Under EU ETS
- 856 t, 60% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | DNV | Germany |
| 2024 | Bureau Veritas Certification France | France |
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).
This page draws on 7 MRV reporting years, 4 of 5 vessel particulars and a name history. Not found in the sources for this vessel: an efficiency ranking, AIS movements in Norwegian waters, 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.