Chemical tanker · Portugal flag
ATHENIAN HORIZON: CO₂ emissions 2025
IMO 1026635 MMSI 255916109EU ETS
- CO₂ reported 2025
- 2,740 t
- Fuel burned
- 875 t
- Distance
- 14,040 nm
- Time at sea
- 1,280 h
- Emitted at berth
- 3% of total
- Share of year under way
- 15%
ATHENIAN HORIZON against its type
It is one of 71 chemical tankers here under the Portugal flag, 3.0% of the 2,344 on the register.
Its 2,740 t of CO₂ for 2025 is 50% 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 195.1 kg CO₂, 22% below the type median of 250.2 kg. It logged 1,280 hours at sea against a median of 2,106 hours for its type that year. 3.2% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Of the 5 comparable vessels listed below with a 2025 return, 3 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2025–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 2,740 | 875 | 14,040 | 1,280 | 88 | 195.1 | 11.7 | 34 |
Vessel particulars
- IMO number
- 1026635
- MMSI
- 255916109
- Call sign
- CQ2538
- Ship type
- Chemical tanker
- Length overall
- 150.0 m
- Beam
- 23.0 m
- Flag state
- Portugal per EU MRV 2025
- Port of registry
- MADEIRA MRV 2025
- Home port
- MADEIRA
- Ice class
- IC
- Technical efficiency (design)
- EEXI (5.97 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-03-10
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 457 of 1,348 qualifying chemical tankers by EEOI, at the 34th percentile. The dashed line is the type median, 14.4; this vessel reported 11.7.
EEOI divides emissions by transport work, which for this vessel and year was 234,174,359 tonne-miles over 14,040 nautical miles.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 2,783 t
- Methane (CH₄)
- 0.04 t
- Nitrous oxide (N₂O)
- 0.16 t
- Under EU ETS
- 1,511 t, 55% of total
Observed movementsAIS · Norwegian waters
- First seen
- 06 Apr 2026
- Last seen
- 10 May 2026
- Days observed
- 5
- Positions
- 369
- Median speed
- 10.9 kn
Its recorded positions span 58.0°N to 59.3°N and 9.1°E to 10.7°E.
85 hourly points from 369 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.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2025–2025, published by the European Commission.
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 1 MRV reporting year, an efficiency ranking, 2 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.