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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.

Side by side

All 2025 reports of each operator, across every ship type. Change is against 2024 where the operator reported then.

HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA
Ships7
CO₂ emitted274 kt−6.0%
Fuel per mile176 kg/nm
Average speed20.5 kn
CO₂ at berth2.8%
Ships burning LNG0
Main segmentRo-pax

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.

Ro-pax

CO₂ per transport work (pax) in g CO₂/pax·nm · segment median 567

  • HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA126 (−78%)
  • ← betterworse →

CO₂ per transport work (freight) in g CO₂/t·nm · segment median 253

  • HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA1,086 (+329%)
  • ← betterworse →
ShipsPer work (pax)vs medianFuel kg/nmSpeed knHours at seaAt berthLNG
HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA7126
1,086 freight
−78%
+329% freight
17620.53,4232.8%–
Segment median 567
253 freight
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 notesB · tank monitoringC · flow metersD · direct
HELLENIC SEAWAYS SINGLE MEMBER MARITIME SAVerifavia (7)0%100%0%0%

HELLENIC SEAWAYS SINGLE MEMBER MARITIME SA: ships furthest from their peers

Each ship's CO₂ per transport work against the median ship of its type and size band. +100% means the ship emits twice as much CO₂ for the same transport work as a typical ship of its size. Ro-pax ships show passenger figures, with freight underneath.

ShipIMOSegmentCO₂ per transport workSize-band medianvs medianSpeed knCO₂Allowances
HIGHSPEED 49216183Ro-pax708 g CO₂/pax·nm
5,669 g CO₂/t·nm freight
567
253
+25%
+2139%
28.214,302 t€4k
HIGHSPEED 39188867Ro-pax566 g CO₂/pax·nm
4,984 g CO₂/t·nm freight
567
253
0%
+1868%
28.111,756 t€10k
BLUE STAR CHIOS9215555Ro-pax149 g CO₂/pax·nm
1,161 g CO₂/t·nm freight
567
253
−74%
+359%
21.369,749 t€294k
BLUE STAR MYCONOS9208679Ro-pax126 g CO₂/pax·nm
1,086 g CO₂/t·nm freight
567
253
−78%
+329%
22.067,337 t€25k
ARIADNE9135262Ro-pax45.1 g CO₂/pax·nm
350 g CO₂/t·nm freight
567
253
−92%
+38%
19.152,464 t€1.4m
NISSOS SAMOS8712635Ro-pax34.8 g CO₂/pax·nm
283 g CO₂/t·nm freight
567
253
−94%
+12%
16.928,577 t€14k
NISSOS RODOS8704406Ro-pax31.2 g CO₂/pax·nm
227 g CO₂/t·nm freight
567
253
−94%
−10%
18.429,743 t€1.2m

30 of 7 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 matched on name and known ownership. 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.