Systems, devices, and methods are provided for operating a watercraft vessel. The system can include a communication unit configured to receive a position signal and a velocity signal of the first vessel. The system can include a first sensing unit configured to determine a relative position signal of one or more nearby vessels including the first vessel, a second sensing unit configured to detect and measure a fluid velocity field of a vortex around the watercraft vessel, and a third sensing unit configured to detect and measure an efficiency gain from a lifting force experienced by watercraft vessel operating in an upwash region of the vortex. And the system can include a control unit configured to maneuver the watercraft vessel from a first position to an optimum position.

Systems, devices, and methods are provided for operating a watercraft vessel. The system can include a communication unit configured to receive a position signal and a velocity signal of the first vessel. The system can include a first sensing unit configured to determine a relative position signal of one or more nearby vessels including the first vessel, a second sensing unit configured to detect and measure a fluid velocity field of a vortex around the watercraft vessel, and a third sensing unit configured to detect and measure an efficiency gain from a lifting force experienced by watercraft vessel operating in an upwash region of the vortex. And the system can include a control unit configured to maneuver the watercraft vessel from a first position to an optimum position.

The invention involves a hydrofoil vessel (1) comprising a hydrofoil assembly (4), and a hull assembly (2) presenting, when the vessel is floating at rest, a vertical symmetry plane (SP), wherein the hydrofoil assembly (4) comprises two struts (401) extending from the hull assembly (2) on opposite transverse sides of the symmetry plane (SP), mainly downwards when the vessel is floating at rest, or mainly partly away from the symmetry plane and partly downwards when the vessel is floating at rest, wherein the hydrofoil assembly (4) comprises two main foil portions (411) each extending from a respective one of the struts (401), at least partly towards the symmetry plane (SP), wherein each strut (401) comprises a strut foil (402) with a non-symmetrical cross-section, and with a pressure side (402P) facing at least partly towards the symmetry plane, and a suction side (402S) facing at least partly away from the symmetry plane (SP).

A marine propulsion system includes wings with a hydrofoil shaped geometry arranged for mounting on opposite side sections of a vessel comprising at least one hull adjacent the transom. Each wing includes a first section extending downwards along the side of the hull and at least partially below the waterline in its operative position. Each wing includes a second section extending towards the central longitudinal axis of the hull in its operative position. The second section each wing is arranged to support at least one propulsor. The first section of each wing is mounted rotatable about a vertical axis.

A wakeboat creates a wake, the performance level of the wake varying depending upon the mass of the wakeboat, the wakeboat including a hull; an engine supported by the hull; a controller supported by the hull; a processor coupled to the controller; a memory coupled to the processor; a sensor configured to measure at least one parameter of the wakeboat, the controller being coupled to the sensor and being configured to receive data from the sensor, the controller being configured to derive the present mass of the wakeboat from said sensor data, the controller being configured to determine the present wake performance level of the wakeboat based on the present mass of the wakeboat; and a tablet computer coupled to the controller, the controller being configured to use the tablet computer to indicate the present wake performance level of the wakeboat.

A linear drive system adapted for repetitive driving using a linear motor. The drive system may be used to power pumping hydrofoils which drive a boat or ship. Linkages are used to maintain the driven portion in linear motion. A coupled dual drive system in which two driven portions are coupled such that their coupled motions travel at the same velocity in opposed directions. The coupled linear drive system which may be used as a mechanical power source for drive systems used in transportation and industry. A boat with dual pumping hydrofoils adapted for propel a boat using the hydrofoils for both lift and propulsion.

A linear drive system adapted for repetitive driving using a linear motor. The drive system may be used to power pumping hydrofoils which drive a boat or ship. Linkages are used to maintain the driven portion in linear motion. A coupled dual drive system in which two driven portions are coupled such that their coupled motions travel at the same velocity in opposed directions. The coupled linear drive system which may be used as a mechanical power source for drive systems used in transportation and industry. A boat with dual pumping hydrofoils adapted for propel a boat using the hydrofoils for both lift and propulsion.

The invention concerns a vessel for floating in a body of water, comprising a hull having an aft hull section and an aft body arranged at a distance from the aft hull section, thereby forming a passage into which water can flow. The aft body and the aft hull section are designed to minimize the vessel's stern wave during forward movements.

A boat includes at least three trim devices positioned aft of the boat's transom. To improve the boat's ability to get on place, each trim device is initially positioned to a deployed position. The speed of the boat is then determined as the boat gains speed. When the speed of the boat exceeds a first predetermined threshold, the first trim device is moved from the deployed position to a non-deployed position. When the speed of the boat exceeds a second predetermined threshold, the second trim device is moved from the deployed position to a non-deployed position. When the speed of the boat exceeds a third predetermined threshold, the third trim device is moved from the deployed position to a non-deployed position. At least one of the first, second, and third predetermined thresholds is different from the other two of the first, second, and third predetermined thresholds.

A hydrofoil system for a hydrofoil equipped watercraft with cooperating fuselage portion that have tapered sections. The tapered sections are configured to form an overlapping stacked wedge within an inner passageway of a collar so that the collar frictionally engages the stacked tapered sections when the first fuselage portion and the second fuselage portion are drawn together longitudinally.