MERNA 1
- IMO
- 8716954
- Type
- Ro-ro ship
- Average cargo carried
- 539 t
- Port of registry
- Malakl Harbour
- Technical efficiency
- EEXI 21.38 g CO₂/t·nm
- Former names
- ISLAND EXPRESS
ISM company (DoC holder) in 2025: merna navigation & international trans
2025 at a glance
From the 2025 THETIS-MRV report. Carries about 539 t of cargo on average.
Within the ro-ro fleet, 2025
Set against all 235 ro-ro 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.
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.
- Between EU ports6%
- From the EU43%
- Into the EU45%
- At berth in the EU6%
56% of this ship's CO₂ falls under the EU ETS (3,291 t).
Over the years
Full-year reports only. The Ro-ro median is the middle ship of all ro-ro ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.
Fuel kg/nm
- MERNA 1
- Ro-ro median
Average speed, kn
- MERNA 1
- Ro-ro median
CO₂ per transport work (cargo), g CO₂/t·nm
- MERNA 1
- Ro-ro median
Year on year
| Year | Average speed | Fuel kg/nm | Fuel per day at sea | Distance | CO₂ per transport work | Reading |
|---|---|---|---|---|---|---|
| 2024→2025 | +3.4 kn | −18% | +16% | +51% | −13% | 3.4 kn faster, fuel per mile down 18%; better than speed alone explains (hull, engine or trade). |
| 2023→2024 | −0.2 kn | −13% | −15% | +39% | +12% | Same speed, fuel per mile down 13%; better than speed alone explains (hull, engine 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 | Hours at seah | Average speedknots at sea | Fuel kg/nmthis ship | CO₂ per transport work (cargo)g/t·nm, this ship | Laden fuel |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | merna navigation & international trans | 1,828 | 5,862 | 55,418 | 4,737 | 11.7 | 33.0 | 196.08 | 1% |
| 2024 | merna navigation & international trans | 1,470 | 4,713 | 36,684 | 4,406 | 8.3 | 40.1 | 224.16 | 5% |
| 2023 | not published | 1,213 | 3,888 | 26,298 | 3,090 | 8.5 | 46.1 | 199.50 | – |
Benchmark and verification
| Year | ISM company | CO₂ per TW, g CO₂/t·nm | Ro-ro median | vs Ro-ro | Rank | Verifier | Methods |
|---|---|---|---|---|---|---|---|
| 2025 | merna navigation & international trans | 196.08 | 95.19 | +106% | 182 of 235 | Verifavia | A |
| 2024 | merna navigation & international trans | 224.16 | 97.53 | +130% | 180 of 220 | Verifavia | A |
| 2023 | not published | 199.50 | 108.62 | +84% | 170 of 221 | RINA | A |
Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Ro-ro 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 ro-ro 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.