A cable fairing (fairing) (40) for reducing the flow resistance for a cable (45) has a wing formed cross section with a wide, rounded front and a tapered tail, a through-going cable channel (46) for the cable (45) perpendicular to the cross section of the widest part of the cross section. The wing profile comprises an elastic material of sufficient stiffness to maintain the shape when it is towed thereby causing flow resistance. The cable fairing (40) has slots (42) cut into the elastic material from the tail towards the cable channel (46), so that the tail comprises slats (41) which can be bent parallel to the cable channel (46) to reduce the cross-section of the cable fairing. By this is low flow resistance, as from a stiff cable jacket, combined with sufficient elastic deformability so the cable (45) with attached cable fairings (40), can be winched and pass through narrow openings in the deployment and retrieval, and wound onto a reel for storage and transport.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

Vehicles designed to use ground effect forces to control a positioning of the vehicle relative to a surface as well as their methods of use are described.

A floating boat lift having flotation tanks positioned under sides of a frame of the boat lift. Water flow is regulated so that tanks fill from near the center of the boat lift. A preferred hingeable connection of the boat lift to a bulkhead, along with lateral stabilization, participates in maintaining a generally horizontal attitude for the boat lift. Water is accepted into or pumped from the flotation tanks, allowing the frame of the boat lift to fall or rise relative to the surface of the water. One or more catwalks along the sides of the boat lift and connected to the bulkhead may float, but at a level that is independent of the boat lift frame.

A vortex generation system and method for reducing hydrodynamic drag in ships with high block coefficients is disclosed. The system includes a hull and a plurality of vortex generators affixed circumferentially to the hull at locations determined relative to the point of detachment of the boundary layer. Each vortex generator features substantially triangular surfaces with dimensions, such as height, width, and surface area, optimized using a data-driven methodology employing Gaussian Process Regression (GPR). The method iteratively analyzes computational fluid dynamics (CFD) models to identify optimal design parameters, including wedge angle, longitudinal position, and density of vortex generators, which minimize form drag while maintaining low skin friction coefficients. This system significantly enhances fuel efficiency and operational performance by addressing the moving detachment point dilemma and optimizing vortex generator configurations. Applications include marine vehicles and submerged structures, with scalability ensured through calculated scaling factors for full-scale implementation.

A hydro foil for use with a strut extending from a watercraft hull. The hydro foil includes a fuselage extending along a longitudinal axis. The fuselage is distally attachable to the strut. The hydro foil further includes a lifting foil having first and second lifting. The wings each have first and second protrusions both longitudinally arrayed along the fuselage. The first and second protrusions connect at an apex to form a loop. The first protrusion has a first protrusion leading edge and a first protrusion trailing edge. The second protrusion has a second protrusion leading edge and a second protrusion trailing edge. The first and second leading edges forming a continuous foil leading edge and the first and second trailing edges forming a continuous foil trailing edge. The first protrusion trailing edge is disposed between the first protrusion leading edge and the second protrusion leading edge.