A trim system for a watercraft has a nozzle pivotable about a trim axis, a trim actuator operatively connected to the nozzle, at least one sensor for sensing at least one operating condition of the watercraft, a control unit electronically connected to the at least one sensor for receiving a sensor input signal indicative of the at least one operating condition. In a first trim control mode, the control unit controls the trim actuator to pivot the nozzle about the trim axis within a first range of trim angles. In a second trim control mode, the control unit controls the trim actuator to pivot the nozzle about the trim axis within a second range of trim angles. The first range of trim angles is greater than the second range of trim angles. A watercraft having a trim system and a method of controlling the trim are also disclosed.

A jet-propelled boat includes a power unit that applies a propulsive force to a ship body by injecting water taken in from a water inlet while pressurizing the water, a position detection unit that detects a position of the ship body, a determination unit that determines whether or not an operation mode is a fixed position mode, and a power control unit that controls the power unit based on detection information by the position detection unit so that a position of the ship body falls within a target range including a specific anchor position in a case where the determination unit determines that the operation mode is the fixed position mode.

A jet-propelled boat includes a power unit that applies a propulsive force to a ship body by injecting water taken in from a water inlet while pressurizing the water, a position detection unit that detects a position of the ship body, a determination unit that determines whether or not an operation mode is a fixed position mode, and a power control unit that controls the power unit based on detection information by the position detection unit so that a position of the ship body falls within a target range including a specific anchor position in a case where the determination unit determines that the operation mode is the fixed position mode.

A rotary device (e.g., a rotary jet), power generation system, and methods of manufacturing and using the same are disclosed. The rotary jet includes a central axle or shaft, an inlet configured to receive at least one fluid, and a plurality of radial arms in fluid communication with the inlet, configured to rotate around the central axle or shaft. Each radial arm has a nozzle at a distal end thereof and an arc between the inlet and the nozzle. The radial arms extend radially from the central axle or shaft at least in part, and are configured to rotate when the fluid enters the inlet and passes through the radial arms, or when a rotational force is applied to the central axle or shaft. Each nozzle may have an opening facing away from a direction of rotation of the radial arms or facing in a direction parallel with the central axle or shaft.

A watercraft includes a deck and a hull having a transom, right and left side portions a tunnel, and a bottom portion. An air intake system disposed in the engine compartment and fluidly communicating with an engine includes an air compressor and an intercooler. The intercooler includes a housing having a lower surface extending generally along the bottom hull portion, an upper surface extending thereabove, an intercooler air inlet, an intercooler air outlet spaced from the intercooler air inlet at least in a direction parallel to the lower surface, a water inlet, and a water outlet. An intercooler core enclosed within the housing defines at least one air channel fluidly communicating with the intercooler air inlet and the intercooler air outlet. At least one water channel fluidly communicating with the water inlet and outlet is diathermally connected with the at least one air channel for cooling air flowing therein.

A jet pump includes a propulsion system including an impeller coupled to a rotatable shaft configured to receive torque from an engine and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the exhaust system is integrated with the propulsion system. In another embodiment, a jet pump includes a propulsion system including a water intake configured to take in water from a body of water, the water intake including an intake grate and an intake base, and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the intake base of the water intake is configured to be coupled to an exterior surface of a hull of the watercraft.

A jet pump includes a propulsion system including an impeller coupled to a rotatable shaft configured to receive torque from an engine and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the exhaust system is integrated with the propulsion system. In another embodiment, a jet pump includes a propulsion system including a water intake configured to take in water from a body of water, the water intake including an intake grate and an intake base, and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the intake base of the water intake is configured to be coupled to an exterior surface of a hull of the watercraft.

A retractable anchor fixture for accessories is described. The retractable anchor fixture is adapted for being movably disposed in a surface aperture in a surface and includes a fixture body, a fixture base extending from the fixture body, the fixture base including a stopper portion adapted for abutting an edge of the surface aperture, a first aperture defined by the fixture body, the first aperture being adapted to receive therethrough a portion of an anchor for anchoring an accessory to the anchor fixture, and an anchor chamber defined by the fixture body and communicating with the first aperture. An anchor fixture system including a retractable anchor fixture is also described.

A retractable anchor fixture for accessories is described. The retractable anchor fixture is adapted for being movably disposed in a surface aperture in a surface and includes a fixture body, a fixture base extending from the fixture body, the fixture base including a stopper portion adapted for abutting an edge of the surface aperture, a first aperture defined by the fixture body, the first aperture being adapted to receive therethrough a portion of an anchor for anchoring an accessory to the anchor fixture, and an anchor chamber defined by the fixture body and communicating with the first aperture. An anchor fixture system including a retractable anchor fixture is also described.

Shaping a wave produced by a boat traveling through the water by redirecting water from one side of the boat to the opposite side of the boat. A water inlet port and a water intake scoop on one side of the boat, a water outlet at the center or opposite side/half of the boat, a water conduit between the inlet port and the outlet, and an actuator for selectively positioning the intake scoop in one of an active position in which the intake scoop extends beyond the sides or bottom of the hull and redirects ambient water into and through the inlet port, the water conduit and the outlet, and an inactive position in which the intake scoop does not extends beyond the sides or bottom of the hull and does not redirect ambient water moving past the boat into inlet port.