Other ship types · Norway flag
RONJA HEROY: CO₂ emissions 2024–2025
IMO 9923188 MMSI 258112000EU ETS2 reporting years
- CO₂ reported 2025
- 7,710 t
- Fuel burned
- 2,712 t
- Time at sea
- 7,018 h
- Emitted at berth
- 0% of total
- Share of year under way
- 80%
RONJA HEROY against its type
It is one of 28 vessels in the other ship types category here under the Norway flag, 5.6% of the 499 on the register. Its MRV returns name it RONJA HEROY for 2024 and RONJA HERØY for 2025. The returns for 2024–2025 all give AALESUND as port of registry.
Its 7,710 t of CO₂ for 2025 is 1.5 times the median of 5,122 t among the 335 vessels in the other ship types category on this register that reported for 2025. Per nautical mile it emitted 624.1 kg CO₂, 2.7 times the type median of 231.1 kg. It logged 7,018 hours at sea against a median of 2,231 hours for its type that year. 0.1% of its 2025 emissions were at berth; the median for vessels in the other ship types category was 3.9%. Of the 8 comparable vessels listed below with a 2025 return, 8 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2024–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 7,710 | 2,712 | — | 7,018 | 9 | 624.1 | — | not ranked |
| 2024 | 7,163 | 2,380 | — | 5,995 | 21 | 663.4 | — | — |
Vessel particulars
- IMO number
- 9923188
- Previously reported as
- RONJA HERØY
- MMSI
- 258112000
- Call sign
- LGOC
- Ship type
- Other ship types
- Length overall
- 91.0 m
- Beam
- 22.0 m
- Flag state
- Norway Wikidata/AIS, undated
- Port of registry
- AALESUND MRV 2025
- Home port
- Ålesund
- Efficiency ranking
- Not ranked: implied speed outside 3 to 30 knots (2025)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-07-09
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 7.6% higher than in 2024, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 7.6% and CO₂ per nautical mile fell 5.9%.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
- 9,382 t
- Methane (CH₄)
- 56.38 t
- Nitrous oxide (N₂O)
- 0.35 t
- Under EU ETS
- 7,710 t, 100% of total
Observed movementsAIS · Norwegian waters
- First seen
- 26 Aug 2025
- Last seen
- 04 Jul 2026
- Days observed
- 65
- Positions
- 4,914
- Median speed
- 6.3 kn
Its recorded positions span 68.5°N to 70.6°N and 15.5°E to 23.6°E.
400 hourly points from 4,914 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 2024–2025, published by the European Commission.
- Movements: Norwegian Coastal Administration open AIS extract.
This page draws on 2 MRV reporting years, 2 of 5 vessel particulars, AIS movements in Norwegian waters and a name history. Not found in the sources for this vessel: an efficiency ranking, 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.