General cargo ship · Panama flag · built 2005
CASSIOPEIA STAR: CO₂ emissions 2018–2025
IMO 9303431 EU ETS5 reporting years
- CO₂ reported 2025
- 4,491 t
- Fuel burned
- 1,415 t
- Time at sea
- 2,113 h
- Emitted at berth
- 5% of total
- Share of year under way
- 24%
- Gross tonnage
- 20,283
CASSIOPEIA STAR against its type
Built in 2005, it is 2 years older than the median general cargo ship on this register, which was built in 2007 (2,852 vessels with a known build year). At 20,283 gross tonnage it is larger than 80% of the other 2,665 general cargo ships with a recorded tonnage. It is one of 310 general cargo ships here under the Panama flag, 10.1% of the 3,081 on the register. Its MRV returns name it CASSIOPEIA STAR for 2018 and LADY ZEHMA for 2022–2025. The reported port of registry changed: VALLETTA (2018), then Panama (2022–2025).
Its 4,491 t of CO₂ for 2025 is 1.6 times the median of 2,820 t among the 2,469 general cargo ships on this register that reported for 2025. Per nautical mile it emitted 218.0 kg CO₂, 1.8 times the type median of 122.2 kg. It logged 2,113 hours at sea against a median of 3,044 hours for its type that year. 5.3% of its 2025 emissions were at berth; the median for general cargo ships was 4.3%. Across 5 years with reported emissions, the highest was 2018 (6,973 t) and the lowest 2022 (2,541 t). Of the 5 comparable vessels listed below with a 2025 return, 2 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 | 4,491 | 1,415 | — | 2,113 | 239 | 218.0 | — | — |
| 2024 | 4,614 | 1,468 | — | 1,800 | 229 | 275.7 | — | — |
| 2023 | 5,000 | 1,593 | — | 2,081 | 162 | 290.7 | — | — |
| 2022 | 2,541 | 805 | — | 920 | 225 | 339.8 | — | — |
| 2018 | 6,973 | 2,229 | 21,310 | 2,711 | 416 | 327.2 | 12.9 | 12 |
Vessel particulars
- IMO number
- 9303431
- Previously reported as
- LADY ZEHMA
- Ship type
- General cargo ship
- Gross tonnage
- 20,283
- Length overall
- 172.9 m
- Year built
- 2005
- Flag state
- Panama per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Malta. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Panama MRV 2025
- Technical efficiency (design)
- EIV (6.52 gCO₂/t·nm)
- Verifier
- Bureau Veritas Certification France, France
- Accreditation
- 3-2047 rev. 4
- Compliance document issued
- 2026-06-04
- Compliance document expires
- 2027-06-30
Efficiency against its own type2018
Position 46 of 380 qualifying general cargo ships by EEOI, at the 12th percentile. The dashed line is the type median, 26.8; this vessel reported 12.9.
EEOI divides emissions by transport work, which for this vessel and year was 542,188,958 tonne-miles over 21,310 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 35.6% lower than in 2018, for EU/EEA voyages only. No return is recorded for 2019, 2020, 2021, so the series has gaps.
From 2024 to 2025, emissions fell 2.7% and CO₂ per nautical mile fell 20.9%.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
- 4,560 t
- Methane (CH₄)
- 0.07 t
- Nitrous oxide (N₂O)
- 0.25 t
- Under EU ETS
- 2,742 t, 61% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Nippon Kaiji Kyokai | Japan |
| 2022 | 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 5 MRV reporting years, an efficiency ranking, 4 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.