Adria Ferries has reported a modest but measurable reduction in fuel consumption aboard its passenger ferry AF MIA after applying Propspeed to the vessel’s propeller blades in March 2026, according to a report published by reports on 11 September 2026.
Propspeed, described in the report as a developer of underwater biocide-free, foul-release coatings, said the company’s coating was applied to the AF MIA’s propellers earlier this year. The application is said to have been followed by an internal analysis carried out by the operator that compared consumption before and after the treatment.
The ferry operator’s internal results are reported to show a reduction in fuel use of between 2 and 3 per cent following the Propspeed application. The figure was presented by Propspeed in the company announcement cited by reports.
The timing of the application and the reported outcome are straightforward: the coating was applied in March 2026 and the report documenting the measured reduction appeared on 11 September 2026. No further vessel-specific operational details or raw data were published in the items supplied for this report.
Application and measurement
According to the supplied notes, Propspeed’s product is intended as a foul-release coating for underwater surfaces and does not use biocides. The company reported that Adria Ferries carried out the propeller treatment and then completed an internal assessment of fuel consumption on AF MIA.
The published reduction range of 2 to 3 per cent is drawn from that internal analysis. The report does not include the methodology of the analysis, the period of measurement, nor whether speed, load, weather or voyage profile adjustments were made to normalise the comparison.
Context and caveats
The information available is limited to the single-vessel case described by Propspeed and the internal analysis referenced by the operator. The notes provided do not state whether the results were audited, independently verified or replicated on other vessels in the Adria Ferries fleet.
Operators and technical teams commonly seek third-party verification when evaluating hull and propeller treatments because measured fuel performance can be sensitive to multiple operational variables. The supplied report does not indicate that such verification was carried out for the AF MIA assessment.
The announcement, as recorded by reports, is a company-level communication of a measured outcome on one vessel. The notes do not include any claims about fleet-wide savings, contract extensions or follow-up trials by Adria Ferries, nor do they present any quantified cost or emissions calculations linked to the reported percentage reduction.
The modest percentage cited is nevertheless of interest to ship operators because small relative changes in fuel consumption can become significant over time and across multiple vessels. The supplied facts, however, do not provide the data needed to estimate aggregate financial or environmental impacts.
Those seeking further detail will need to consult the originating announcement or contact the parties for raw results and testing methodology. The reports item dated 11 September 2026 is the published source for the information summarised here.