Bulk carrier · Liberia flag · built 2015
ROBERTA: CO₂ emissions 2021–2025
IMO 9700653 EU ETS4 reporting years
- CO₂ reported 2025
- 2,305 t
- Fuel burned
- 738 t
- Distance
- 9,681 nm
- Time at sea
- 894 h
- Emitted at berth
- 4% of total
- Share of year under way
- 10%
- Gross tonnage
- 36,295
ROBERTA against its type
Built in 2015, it is 3 years newer than the median bulk carrier on this register, which was built in 2012 (6,882 vessels with a known build year). At 36,295 gross tonnage it is larger than 55% of the other 6,571 bulk carriers with a recorded tonnage. It is one of 1,589 bulk carriers here under the Liberia flag, 19.5% of the 8,138 on the register. The same builder is recorded for 127 other vessels here, 9 of them bulk carriers. Its MRV returns name it ROBERTA for 2021–2023 and STAR ROBERTA for 2025. The reported port of registry changed: Majuro (2021–2023), then Monrovia (2025).
Its 2,305 t of CO₂ for 2025 is 29% below the median of 3,239 t among the 3,731 bulk carriers on this register that reported for 2025. Per nautical mile it emitted 238.1 kg CO₂, close to the type median of 260.7 kg. It logged 894 hours at sea against a median of 1,200 hours for its type that year. 4.2% of its 2025 emissions were at berth; the median for bulk carriers was 3.7%. Across 4 years with reported emissions, the highest was 2021 (6,570 t) and the lowest 2025 (2,305 t). Its efficiency percentile within the type went from 33 in 2021 to 70 in 2025 (lower is more efficient). Of the 3 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 | 2,305 | 738 | 9,681 | 894 | 96 | 238.1 | 9.1 | 70 |
| 2023 | 3,426 | 1,094 | 10,958 | 1,216 | 104 | 312.6 | 12.1 | 84 |
| 2022 | 4,591 | 1,466 | 13,866 | 1,252 | 642 | 331.1 | 8.6 | 53 |
| 2021 | 6,570 | 2,102 | 19,736 | 1,598 | 430 | 332.9 | 7.2 | 33 |
Vessel particulars
- IMO number
- 9700653
- Previously reported as
- STAR ROBERTA
- Ship type
- Bulk carrier
- Gross tonnage
- 36,295
- Length overall
- 199.9 m
- Beam
- 32.3 m
- Year built
- 2015
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (3.94 gCO₂/t·nm)
- Verifier
- Bureau Veritas Certification France, France
- Accreditation
- 3-2047 rev. 4
- Compliance document issued
- 2026-03-27
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 2,258 of 3,241 qualifying bulk carriers by EEOI, at the 70th percentile. The dashed line is the type median, 7.6; this vessel reported 9.1.
EEOI divides emissions by transport work, which for this vessel and year was 253,291,209 tonne-miles over 9,681 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 64.9% lower than in 2021, for EU/EEA voyages only. No return is recorded for 2024, so the series has gaps.
From 2023 to 2025, emissions fell 32.7% while distance sailed fell 11.7%and CO₂ per nautical mile fell 23.8%.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
- 2,341 t
- Methane (CH₄)
- 0.04 t
- Nitrous oxide (N₂O)
- 0.13 t
- Under EU ETS
- 1,201 t, 52% of total
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).
This page draws on 4 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars and a name history. Not found in the sources for this vessel: 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.