General cargo ship · Marshall Islands flag · built 2007
IRIS I: CO₂ emissions 2018–2025
IMO 9341172 EU ETS8 reporting years
- CO₂ reported 2025
- 5,534 t
- Fuel burned
- 1,726 t
- Distance
- 40,152 nm
- Time at sea
- 4,271 h
- Emitted at berth
- 21% of total
- Share of year under way
- 49%
- Gross tonnage
- 5,325
IRIS I against its type
Built in 2007, it is the same age as the median general cargo ship on this register (build year 2007, 2,852 vessels with a known build year). At 5,325 gross tonnage it is smaller than 59% of the other 2,665 general cargo ships with a recorded tonnage. It is one of 181 general cargo ships here under the Marshall Islands flag, 5.9% of the 3,081 on the register. The same builder is recorded for 98 other vessels here, all of them general cargo ships. Its MRV returns name it KALKVIK for 2018–2024 and IRIS I for 2025. The reported port of registry changed: Torshavn (2018–2024), then Majuro (2025).
Its 5,534 t of CO₂ for 2025 is 2.0 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 137.8 kg CO₂, 13% above the type median of 122.2 kg. It logged 4,271 hours at sea against a median of 3,044 hours for its type that year. 21.5% of its 2025 emissions were at berth; the median for general cargo ships was 4.3%. Across 8 years with reported emissions, the highest was 2018 (7,799 t) and the lowest 2025 (5,534 t). Its efficiency percentile within the type went from 63 in 2021 to 48 in 2025 (lower is more efficient). Of the 8 sister ships listed below with a 2025 return, 8 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 | 5,534 | 1,726 | 40,152 | 4,271 | 1,190 | 137.8 | 28.9 | 48 |
| 2024 | 6,596 | 2,057 | 54,917 | 5,450 | 271 | 120.1 | 24.3 | 52 |
| 2023 | 6,711 | 2,093 | 55,595 | 5,645 | 366 | 120.7 | 25.3 | 64 |
| 2022 | 6,712 | 2,094 | 57,327 | 6,125 | 330 | 117.1 | 26.3 | 58 |
| 2021 | 7,033 | 2,194 | 56,587 | 5,177 | 268 | 124.3 | 25.9 | 63 |
| 2020 | 7,520 | 2,382 | — | 6,031 | 316 | 118.1 | — | — |
| 2019 | 6,064 | 1,942 | — | 5,294 | 392 | 120.9 | — | — |
| 2018 | 7,799 | 2,466 | — | 5,843 | 399 | 126.6 | — | — |
Vessel particulars
- IMO number
- 9341172
- Previously reported as
- KALKVIK
- Ship type
- General cargo ship
- Gross tonnage
- 5,325
- Length overall
- 113.2 m
- Year built
- 2007
- Flag state
- Marshall Islands per EU MRV 2025
- Builder
- Ferus Smit
- Port of registry
- Majuro MRV 2025
- Home port
- Majuro
- Ice class
- IA
- Technical efficiency (design)
- EEXI (10.5 gCO₂/t·nm)
- Verifier
- ICS Verification Services Single Member P.C., Greece
- Accreditation
- 1101-3
- Compliance document issued
- 2026-03-17
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 233 of 479 qualifying general cargo ships by EEOI, at the 48th percentile. The dashed line is the type median, 29.4; this vessel reported 28.9.
EEOI divides emissions by transport work, which for this vessel and year was 191,837,088 tonne-miles over 40,152 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 29.0% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 16.1% while distance sailed fell 26.9%and CO₂ per nautical mile rose 14.8%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 5,619 t
- Methane (CH₄)
- 0.09 t
- Nitrous oxide (N₂O)
- 0.31 t
- Under EU ETS
- 5,147 t, 93% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Bureau Veritas Certification France | France |
| 2025 | ICS Verification Services Single Member P.C. | Greece |
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) and Wikimedia Commons.
This page draws on 8 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars, a name history and a licensed photograph. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.