Gas carrier · Latvia flag · built 2021
OPTIMUS: CO₂ emissions 2021–2025
IMO 9870472 MMSI 275525000EU ETS5 reporting years
- CO₂ reported 2025
- 4,832 t
- Fuel burned
- 1,739 t
- Distance
- 31,720 nm
- Time at sea
- 4,272 h
- Emitted at berth
- 14% of total
- Share of year under way
- 49%
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OPTIMUS against its type
Built in 2021, it is 8 years newer than the median gas carrier on this register, which was built in 2013 (530 vessels with a known build year). It is the only gas carrier on this register under the Latvia flag. The same builder is recorded for 34 other vessels here. The returns for 2021–2025 all give Riga as port of registry.
Its 4,832 t of CO₂ for 2025 is 19% below the median of 5,974 t among the 363 gas carriers on this register that reported for 2025. Per nautical mile it emitted 152.3 kg CO₂, 41% below the type median of 256.2 kg. It logged 4,272 hours at sea against a median of 1,943 hours for its type that year. 14.5% of its 2025 emissions were at berth; the median for gas carriers was 3.8%. Across 5 years with reported emissions, the highest was 2025 (4,832 t) and the lowest 2021 (571 t). Its efficiency percentile within the type went from 95 in 2023 to 90 in 2025 (lower is more efficient). Of the 7 comparable vessels listed below with a 2025 return, 0 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2021–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 4,832 | 1,739 | 31,720 | 4,272 | 699 | 152.3 | 94.0 | 90 |
| 2024 | 4,301 | 1,554 | 31,379 | 4,116 | 754 | 137.1 | 101.3 | 87 |
| 2023 | 3,993 | 1,414 | 25,634 | 3,615 | 828 | 155.8 | 126.1 | 95 |
| 2022 | 3,136 | 1,083 | — | 1,941 | 1,571 | 288.4 | — | — |
| 2021 | 571 | 199 | — | 246 | 230 | 288.1 | — | — |
Vessel particulars
- IMO number
- 9870472
- MMSI
- 275525000
- Call sign
- YLRT
- Ship type
- Gas carrier
- Length overall
- 100.0 m
- Beam
- 18.0 m
- Year built
- 2021
- Flag state
- Latvia per EU MRV 2025
- Builder
- Damen Yichang Shipyard
- Port of registry
- Riga MRV 2025
- Ice class
- IA
- Technical efficiency (design)
- EEXI (24.36 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-04-09
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 264 of 292 qualifying gas carriers by EEOI, at the 90th percentile. The dashed line is the type median, 27.9; this vessel reported 94.0.
EEOI divides emissions by transport work, which for this vessel and year was 51,386,472 tonne-miles over 31,720 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 746.0% higher than in 2021, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 12.3% while distance sailed rose 1.1%and CO₂ per nautical mile rose 11.1%.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
- 6,076 t
- Methane (CH₄)
- 42.41 t
- Nitrous oxide (N₂O)
- 0.21 t
- Under EU ETS
- 1,700 t, 35% of total
Observed movementsAIS · Norwegian waters
- First seen
- 27 Jul 2026
- Last seen
- 27 Jul 2026
- Days observed
- 1
- Positions
- 49
- Median speed
- 9.8 kn
Its recorded positions span 60.5°N to 60.7°N and 4.4°E to 4.9°E.
11 hourly points from 49 positions. Filled circle first, open circle last; squares are ports for orientation, not calls.
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 |
|---|---|---|
| 2021 | Bureau Veritas Certification France | France |
| 2022 | 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 2021–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0) and Wikimedia Commons.
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 5 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars, AIS movements in Norwegian waters and a licensed photograph. Not found in the sources for this vessel: a name history, 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.