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Navalyze · General cargo · Ship

IRIS I

IMO
9341172
Type
General cargo ship
Average cargo carried
4,778 t
Flag (estimated)
Marshall Islands
Port of registry
Majuro
Technical efficiency
EEXI 10.50 g CO₂/t·nm
Ice class
IA
Former names
KALKVIK

ISM company (DoC holder) in 2025: Anna Shipmanagement Inc

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2019 at a glance

From the 2019 THETIS-MRV report.

Fuel kg/nm
38.7
General cargo median 57.7 kg/nm (−33%)
CO₂ per transport work (dwt)
26.1
g CO₂/dwt·nm · General cargo median 25.0 (+5%)
Average speed
9.5 kn
General cargo median 9.7 kn (−2%)
Fuel per day at sea
8.8 t/day
Fuel consumed
1,942 t
CO₂ emitted
6,064 t
Distance sailed
50,151 nm
CO₂ ÷ CO₂ per mile
Time at sea
5,294 h
221 days, 60% of the year

Within the general cargo fleet, 2025

Set against all 2,723 general cargo ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 43.0 kg/nm · median 35.2 (+22%)
17.4Ranks 1,688 of 2,723, lowest first78.8
Average speedThis ship 9.4 kn · median 9.3 (+1%)
6.9Faster than 52% of general cargo ships12.0
CO₂ per transport work (dwt)This ship 28.9 g CO₂/dwt·nm · median 25.5 (+13%)
10.2Ranks 1,669 of 2,723, lowest first52.7
Middle 80% of shipsMiddle 50%General cargo medianThis ship

Where the emissions happen, 2019

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

  • Between EU ports87%
  • From the EU2%
  • Into the EU4%
  • At berth in the EU6%
Fuel burned laden
–
Not reported
CO₂ at berth
392 t
6.5% of the ship's CO₂, alongside in EU ports
Methane (CH₄)
–
Mainly from LNG; small for oil, biofuel and methanol
CO₂eq uplift
–
CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The General cargo median is the middle ship of all general cargo ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

  • IRIS I
  • General cargo median

Average speed, kn

  • IRIS I
  • General cargo median

CO₂ per transport work (dwt), g CO₂/dwt·nm

  • IRIS I
  • General cargo median

Year on year

YearAverage speedFuel kg/nmFuel per day at seaDistanceCO₂ per transport workReading
2024→2025−0.7 kn+15%+7%−27%+22%0.7 kn slower, fuel per mile up 15%; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024+0.3 kn−1%+2%−1%–Same speed, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2022→2023+0.4 kn+3%+9%−3%–0.4 kn faster, fuel per mile up 3%; better than speed alone explains (hull, engine or trade).
2021→2022−1.5 kn−6%−20%+1%+1%1.5 kn slower, fuel per mile down 6%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021+0.3 kn+4%+7%−11%−9%0.3 kn faster, fuel per mile up 4%; in line with the speed change.
2019→2020+1.1 kn−3%+8%+27%+9%1.1 kn faster, fuel per mile down 3%; better than speed alone explains (hull, engine or trade).
2018→2019−1.0 kn−3%−13%−19%−11%1.0 kn slower, fuel per mile down 3%; worse than speed alone explains (fouling, weather, loading or trade).

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

YearISM companyFuel tCO₂ tDistance nmHours at seahAverage speedknots at seaFuel kg/nmthis shipCO₂ per transport work (cargo)g/t·nm, this shipLaden fuel
2025Anna Shipmanagement Inc1,7265,53440,1524,2719.443.028.9–
2024MARIN SHIP MANAGEMENT B.V.2,0576,59654,9175,45010.137.524.3–
2023not published2,0936,71155,5955,6459.837.725.3–
2022not published2,0946,71257,3276,1259.436.526.3–
2021not published2,1947,03356,5875,17710.938.825.9–
2020not published2,3827,52063,6946,03110.637.4––
2019not published1,9426,06450,1515,2949.538.7––
2018not published2,4667,79961,6215,84310.540.0––

Benchmark and verification

YearISM companyCO₂ per TW, g CO₂/dwt·nmGeneral cargo medianvs General cargoRankVerifierMethods
2025Anna Shipmanagement Inc28.925.5+13%1,669 of 2,723ICS Verification ServicesA
2024MARIN SHIP MANAGEMENT B.V.23.619.3+23%733 of 1,111Bureau VeritasA
2023not published––––Bureau VeritasA
2022not published26.321.6+22%682 of 1,034Bureau VeritasB+C
2021not published25.922.7+14%724 of 1,142Bureau VeritasB+C
2020not published28.524.5+16%754 of 1,167Bureau VeritasB+C
2019not published26.125.0+5%617 of 1,154Bureau VeritasB+C
2018not published29.224.9+17%658 of 1,044Bureau VeritasB+C

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. General cargo ships are benchmarked on CO₂ per transport work (dwt) (TW), in g CO₂/dwt·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's general cargo ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.