Conventional boss caps create a swirling hub vortex cavitation that represents significant energy loss and a source of downstream vibration. In the newbuild design stage, this inefficiency directly impacts the vessel's EEDI score. For shipyards and naval architects, every percentage point of propulsive efficiency translates to a more competitive design and improved regulatory compliance. Eliminating this loss at the design phase is more cost-effective than addressing it post-delivery. The Eco Boss Cap recovers this energy by optimising flow through a proprietary pattern of radial openings. Unlike fin-based solutions, it uses a pressure relief concept that physically breaks the vortex core without adding fragile appendages or mechanical complexity. The result is improved EEDI performance delivered through a manufacturable, low-risk design.

Construction schedules and build efficiency are paramount. The Eco Boss Cap installs as a direct replacement for the standard boss cap using existing shaft configurations and standard shipyard fitting procedures. No hull modifications are required, and no changes to the rudder or propulsion system are needed. With no fins and no moving parts, the design adds zero risk to the propulsion system's mechanical integrity and ensures zero impact on the build timeline. This simplicity supports faster class approval and reduces procurement complexity.

For new build projects, design decisions made today influence vessel value throughout its operational life. By optimising EEDI ratings and reducing delivered power, the Eco Boss Cap supports improved CII performance from the first voyage. This enhances charter attractiveness and positions the vessel favourably for premium operators seeking high-efficiency tonnage. Lower delivered power translates to reduced fuel consumption and CO₂ emissions throughout the vessel lifecycle, supporting fleet decarbonisation targets without compromising operational performance.