Navalyze · Market view · Compare
Compare operators, 2025
Pick a company or group, then the competitors to hold it against, or compare verifiers. Every figure comes from the public THETIS-MRV reports for EU and EEA voyages.
- Optimum Shipmanagement Services SAyour view
Side by side
All 2025 reports of each operator, across every ship type. Change is against 2024 where the operator reported then.
| Optimum Shipmanagement Services SA | |
|---|---|
| Ships | 3 |
| CO₂ emitted | 62 kt−10.4% |
| Fuel kg/nm | 239 |
| Average speed | 12.9 kn |
| CO₂ at berth | 25.0% |
| Ships burning LNG | 0 |
| Ships using alternative fuel | 0 |
| Main segment | Cruise |
Fuel per mile and speed depend on ship size and type; compare them within a segment below.
Segment by segment
Efficiency only compares within a ship type. Each row gives the CO₂ per transport work of an operator's typical (median) ship, and the bar sets it against the typical ship of the whole segment: to the left of the line it emits less CO₂ for the same transport work, to the right more.
Cruise
CO₂ per transport work (pax) in g CO₂/pax·nm · segment median 521
- Optimum Shipmanagement Services SA684 (+31% vs median)
- ← bettersegment medianworse →
| Shipsin cruise | CO₂ per transport work (pax)g/pax·nm, median ship | vs cruise medianlower is better | Fuel kg/nmfleet avg. | Average speedknots at sea | Hours at seaper ship per year | CO₂ at berthshare | LNG / alt. fuelships | |
|---|---|---|---|---|---|---|---|---|
| Optimum Shipmanagement Services SA | 2 | 684 | +31% | 239 | 12.9 | 3,234 | 25.0% | – |
| Segment median | 521 | 0% |
Verification and monitoring
Who verifies each operator's reports, and which MRV methods its ships use to measure fuel (share of reports).
| Verifiers (ships) | A · delivery notes | B · tank monitoring | C · flow meters | D · direct | |
|---|---|---|---|---|---|
| Optimum Shipmanagement Services SA | DNV (3) | 100% | 0% | 0% | 0% |
Optimum Shipmanagement Services SA: ships furthest from their peers
Each ship's CO₂ per transport work against the median ship of its segment, as on the ship's own page. +100% means the ship emits twice as much CO₂ for the same transport work as the median ship. The cost of the gap compares each ship with ships of its size, as everywhere on the site. Ro-pax ships show passenger figures, with freight underneath.
| Ship | IMO | Segment | CO₂ per transport work | Segment median | vs median | Average speed | CO₂ | Allowances | Cost of gap |
|---|---|---|---|---|---|---|---|---|---|
| CELESTYAL JOURNEY | 8919269 | Cruise | 774 g CO₂/pax·nm | 521 | +49% | 12.5 | 32,026 t | €1.5m | €481k |
| CELESTYAL DISCOVERY | 9221566 | Cruise | 594 g CO₂/pax·nm | 521 | +14% | 13.2 | 30,241 t | €1.4m | €173k |
30 of 3 reports shown. A high ratio can mean an older or faster-sailing ship, short trades with much time manoeuvring, or part-loaded voyages; it marks where to look first.
Notes
- Companies are ISM companies (Document of Compliance holders) as named in THETIS, usually the ship manager.
- Groups combine ISM companies trading under the same name, and differently named companies only where a public source shows common ownership (linked in the member list). If a company is in the wrong group, tell us at info@navalyze.com.
- Efficiency figures use full-year reports with fuel; totals include part-year reports.
- Euro figures use the EUA price set at the top of the page.
- Verifier names vary by entity and year (for example DNV AS and DNV Hellas); they are rolled up into one brand. A verifier's figures cover the ships whose 2025 report it verified.