Wakeboat ballast pump systems and methods are provided to monitor the operational condition and parameters of wakeboat ballast components. Systems and methods for sensing and measurement are provided to detect parameters associated with wakeboat ballast pumps and compartments, including systems and methods that can economically retrofit into existing wakeboat ballast systems. Systems and methods are also provided to enable automated action based on various operational conditions and parameters to improve the safety, automation, performance, convenience, and marketing advantage of wakeboat ballast pumps.

A boat includes a controller that is communicatively coupled to a control screen. The controller has stored therein a plurality of modes corresponding to an activity and includes a plurality of controls corresponding to the activity. The controller is configured to display on the control screen, when one of the modes is activated, the plurality of controls for the activated mode. The activated mode may also be an operating mode that corresponds to an operational condition of the boat. The boat may include a processor that is configured to generate an adjusted audio signal by selecting one or more of a plurality of subranges of frequencies of an audio signal and adjusting the selected subranges to compensate for at least one environmental condition associated with the operational condition of the boat corresponding to the operating mode.

A boat includes a controller that is communicatively coupled to a control screen. The controller has stored therein a plurality of modes corresponding to an activity and includes a plurality of controls corresponding to the activity. The controller is configured to display on the control screen, when one of the modes is activated, the plurality of controls for the activated mode. The activated mode may also be an operating mode that corresponds to an operational condition of the boat. The boat may include a processor that is configured to generate an adjusted audio signal by selecting one or more of a plurality of subranges of frequencies of an audio signal and adjusting the selected subranges to compensate for at least one environmental condition associated with the operational condition of the boat corresponding to the operating mode.

An underwater propulsive device of a watercraft including a flotation unit on which a user rides. The propulsion device includes: a hollow body coupled to the flotation unit through a strut and extending in a propulsive direction of the watercraft, the inside of the hollow body being divided into a first compartment and a second compartment; a motor in the first compartment; a propeller in the second compartment; and a power transfer shaft extending in the propulsive direction and connecting the motor and the propeller to each other. The first compartment has a waterproof structure. The second compartment has a water inlet disposed closer to the bow than the propeller is and extending along a circumference of the power transfer shaft and a water jet outlet disposed at a stern-side end of the second compartment. The propeller is smaller than the first compartment in diameter.

A therapeutic flotation device and a therapeutic method of use thereof is disclosed. The device includes a plurality of buoyant float elements and a member (an elongated web strap) that couples each of the buoyant float elements such that the buoyant float elements are serially aligned along the member. A first end of the member is secured to a second end of the member. A mating mechanism, such as a buckle, secures the first end of the member to the second end of the member, or the two ends of the member may be permanently secured to each other using an adhesive or by being sewn together. Each of the buoyant float elements has a center aperture aligned along the center of a cross-section thereof. The member is preferably coupled to each of the buoyant float elements by being sequentially passed through the center apertures of each buoyant float element.

A therapeutic flotation device and a therapeutic method of use thereof is disclosed. The device includes a plurality of buoyant float elements and a member (an elongated web strap) that couples each of the buoyant float elements such that the buoyant float elements are serially aligned along the member. A first end of the member is secured to a second end of the member. A mating mechanism, such as a buckle, secures the first end of the member to the second end of the member, or the two ends of the member may be permanently secured to each other using an adhesive or by being sewn together. Each of the buoyant float elements has a center aperture aligned along the center of a cross-section thereof. The member is preferably coupled to each of the buoyant float elements by being sequentially passed through the center apertures of each buoyant float element.

A vessel for farming of marine organisms includes several tanks with seawater and the marine organisms that shall be farmed, where the tanks include a farming net cage that holds the marine organisms and where the tanks are open to the surrounding seawater.

The invention relates to a control bar for grip, traction and control of a traction unit which has the control means of the control device, steering, acceleration and possible elevation and descent integrated into the structure thereof, the control means able to be thumbwheels, push buttons, pressure sensors, a gyroscope, a joystick or any combination of the same, or electronic processing means that allow for voice recognition. It also has a control unit and another communications unit (either connected by wiring or wireless) as well as its own power supply integrated in the support structure or received from the traction unit.

A boat includes a controller that is communicatively coupled to a control screen. The controller has stored therein a plurality of modes corresponding to an activity and includes a plurality of controls corresponding to the activity. The controller is configured to display on the control screen, when one of the modes is activated, the plurality of controls for the activated mode. The activated mode may also be an operating mode that corresponds to an operational condition of the boat. The boat may include a processor that is configured to generate an adjusted audio signal by selecting one or more of a plurality of subranges of frequencies of an audio signal and adjusting the selected subranges to compensate for at least one environmental condition associated with the operational condition of the boat corresponding to the operating mode.

A boat includes a planing hull, a propeller, a main rudder, and a pair of flanking rudders. The planing hull has port and starboard sides, a transom, a hull bottom, and a centerline running down the middle of the boat, halfway between the port and starboard sides. The propeller is positioned forward of the transom and beneath the hull bottom. The main rudder is positioned aft of the propeller. The main rudder has a rotation axis about which the main rudder rotates. The flanking rudders are positioned forward of the propeller. One of the flanking rudders is positioned on the port side of the centerline, and the other flanking rudder is positioned on the starboard side of the centerline.