Propspeed Joins RightShip’s Zero Harm Partners Program

Propeller Condition in Vessel Efficiency

On November 4, 2026, gCaptain reported that Propspeed had joined RightShip’s Zero Harm Innovation Partners Program. Propspeed brings biocide-free, foul-release coatings for propeller blades to RightShip’s network of maritime supply-chain organisations.

RightShip’s program supports technologies and practices for safer, more sustainable shipping through collaboration and knowledge sharing.

Why Propeller Fouling Affects Efficiency

The source says fouling and roughness on a propeller can affect propulsion efficiency despite the propeller’s small share of a vessel’s wetted surface area. Mechanical wear, marine growth, corrosion, cavitation erosion and operational damage can increase blade roughness during a vessel’s operating cycle.

As roughness increases, water flow across the blades changes and the vessel may need more power to maintain speed. Fuel consumption, operating costs and emissions may rise as a result.

The extent of deterioration depends on operating conditions, trading patterns, ports of call and time spent idle. Propeller condition therefore requires attention between scheduled dry dockings.

How the Coating System Works

Propspeed’s system has two components applied during scheduled dry docking: an etching primer that bonds to the metal substrate and a silicone-based foul-release topcoat. The coating aims to reduce surface roughness and make it harder for marine organisms to attach during the operating cycle.

Propeller coatings must retain adhesion and foul-release performance under mechanical and operational stress.

Efficiency and Environmental Considerations

The source says the biocide-free system discourages attachment through its surface rather than chemicals. This approach may reduce the risk of invasive aquatic species moving between marine environments through propeller fouling.

The foul-release properties may reduce the need for repeated underwater propeller polishing. Fewer diving interventions could reduce costs and occupational safety exposure.

Actual efficiency gains and fuel savings depend on vessel-specific conditions and operating practices. The source gives no blanket efficiency figure for the technology.

What This Means for Owners and Managers

Shipowners and technical managers can track propeller surface condition alongside hull maintenance. Vessels that spend long periods idle, call frequently at high-fouling ports or operate for extended intervals between dry dockings may require closer attention to propeller condition.

Operators need inspection data to assess coating claims and in-service degradation. Independent underwater inspections can confirm surface condition between dockings.