DARK OCEAN
- IMO
- 9204491
- Type
- Container ship
- Port of registry
- Belize City
- Technical efficiency
- EEXI 33.30 g CO₂/t·nm
- Ice class
- IA
- Former names
- IAPETOS
ISM company (DoC holder) in 2025: GMZ SHIP MANAGEMENT CO. S.A.
2025 at a glance
From the 2025 THETIS-MRV report.
Within the container fleet, 2023
Set against all 1,899 container ships with a full-year 2023 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.
Where the emissions happen, 2025
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.
The voyage split is not in this year's report.
Over the years
Full-year reports only. The Container median is the middle ship of all container ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.
Fuel per mile, kg/nm
- DARK OCEAN
- Container median
Average speed, kn
- DARK OCEAN
- Container median
CO₂ per transport work (cargo), g CO₂/t·nm
- DARK OCEAN
- Container median
Year on year
| Year | Speed | Fuel per mile | Fuel per day | Distance | CO₂ per TW | Reading |
|---|---|---|---|---|---|---|
| 2024→2025 | – | – | – | – | – | |
| 2023→2024 | −2.1 kn | +88% | +43% | −98% | – | 2.1 kn slower, fuel per mile up 88%; worse than speed alone explains (fouling, weather, loading or trade). |
| 2022→2023 | −0.6 kn | −13% | −19% | −2% | +0% | 0.6 kn slower, fuel per mile down 13%; in line with the speed change. |
| 2021→2022 | −0.7 kn | −12% | −18% | +2% | −18% | 0.7 kn slower, fuel per mile down 12%; in line with the speed change. |
| 2020→2021 | +0.1 kn | +3% | +3% | −3% | −1% | Same speed, fuel per mile up 3%; in line with the speed change. |
| 2019→2020 | −1.0 kn | −4% | −12% | +5% | – | 1.0 kn slower, fuel per mile down 4%; worse than speed alone explains (fouling, weather, loading or trade). |
| 2018→2019 | +0.3 kn | +12% | +15% | +11% | – | 0.3 kn faster, fuel per mile up 12%; 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
| Year | ISM company | Fuel t | CO₂ t | Distance nm | At sea h | Speed kn | Fuel kg/nm | CO₂ g/t·nm | Laden fuel |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | GMZ SHIP MANAGEMENT CO. S.A. | 0 | 0 | – | 0 | – | – | – | – |
| 2024 | GMZ SHIP MANAGEMENT CO. S.A. | 74 | 235 | 596 | 89 | 6.7 | 124.4 | – | – |
| 2023 | not published | 2,024 | 6,333 | 30,565 | 3,465 | 8.8 | 66.2 | 80.07 | – |
| 2022 | not published | 2,364 | 7,388 | 31,067 | 3,294 | 9.4 | 76.1 | 79.92 | – |
| 2021 | not published | 2,656 | 8,320 | 30,567 | 3,040 | 10.1 | 86.9 | 97.59 | – |
| 2020 | not published | 2,661 | 8,358 | 31,459 | 3,133 | 10.0 | 84.6 | 98.41 | – |
| 2019 | not published | 2,652 | 8,300 | 30,041 | 2,742 | 11.0 | 88.3 | 111.21 | – |
| 2018 | not published | 2,121 | 6,622 | 26,977 | 2,519 | 10.7 | 78.6 | 99.27 | – |
Benchmark and verification
| Year | ISM company | CO₂ per TW, g CO₂/t·nm | Container median | vs Container | Rank | Verifier | Methods |
|---|---|---|---|---|---|---|---|
| 2025 | GMZ SHIP MANAGEMENT CO. S.A. | – | – | – | – | Verifavia | A |
| 2024 | GMZ SHIP MANAGEMENT CO. S.A. | – | – | – | – | Verifavia | A |
| 2023 | not published | 80.07 | 19.40 | +313% | 1,878 of 1,899 | EMICERT | A |
| 2022 | not published | 79.92 | 19.13 | +318% | 1,792 of 1,825 | EMICERT | A |
| 2021 | not published | 97.59 | 17.90 | +445% | 1,772 of 1,781 | EMICERT | A |
| 2020 | not published | 98.41 | 17.58 | +460% | 1,793 of 1,797 | EMICERT | A |
| 2019 | not published | – | – | – | – | EMICERT | A |
| 2018 | not published | 99.27 | 20.22 | +391% | 1,686 of 1,705 | EMICERT | A |
Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Container ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·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 container 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.