Naval operators require propulsion systems that reduce underwater radiated noise, extend operational range, and maintain fleet readiness under demanding conditions.
The Eco Boss Cap is a propeller retrofit for frigates, destroyers, offshore patrol vessels and auxiliary fleets that helps reduce acoustic signature and mechanical wear while supporting extended mission endurance. It is designed for operational simplicity, with no fins, no moving parts, and retrofit options while afloat or during dry dock.
Independent testing demonstrated a 3.27% reduction in delivered power, which translates to fuel savings of 3–5% and extended loitering time. By eliminating propeller hub vortex cavitation, the design significantly reduces underwater radiated noise and protects sensitive stern gear from cavitation damage.
This makes the Eco Boss Cap a strategic option for naval commands looking to enhance stealth capability, extend operational reach and maintain fleet availability.
How the EcoBoss Cap improves Naval fleet
Acoustic stealth and refit risk
The propeller hub vortex generates broadband noise that can compromise acoustic stealth and interfere with onboard sonar performance. This cavitation also accelerates erosion at the rudder and increases vibration throughout the stern gear.In naval operations, this typically results in reduced tactical advantage, expanded maintenance requirements during refit and increased lifecycle costs for high-value propulsion components.The Eco Boss Cap addresses this by stabilising flow at the hub using a pattern of radial openings. Unlike fin based solutions, it does this without adding fragile appendages that could shear off during high speed manoeuvres or shock events.The result is improved acoustic performance delivered through a combat-ready, shock-resistant design.
Proven performance for defence applications
Independent validation using industry-standard facilities confirms:
Engineered for fleet availability and rapid deployment
Naval uptime is a strategic necessity.The Eco Boss Cap can be installed while afloat or during a scheduled refit, allowing installation to align with existing maintenance cycles. No hull modifications are required, and no changes to the wider propulsion system are needed.With no fins and no moving parts, the design is well-suited to high-tempo naval operations and reduces exposure to in-service damage or unplanned maintenance intervention.
Supporting mission endurance and lifecycle protection
For naval fleets, efficiency translates directly into operational reach and time on station.By reducing fuel consumption, the Eco Boss Cap allows vessels to remain on station longer between refuelling intervals. This supports extended patrol endurance and reduces logistical burden in forward-deployed operations.
Extendedmission range
Up to 3–5% fuel savings increase operational endurance and time on station.
Combat-readydurability
No moving parts. No fins. Manufactured from high-grade, shock-resistant AB2 bronze.
Technical information
Detailed technical validation, CFD results and independent test data are available for naval architects, programme executive offices and technical directors.