A multipurpose watercraft has a pair of catamaran pontoons supported by way of a transverse control bar at forward regions thereof. The watercraft may have an arched equipment rack framework extending above rearward regions of the pontoons. The watercraft also has a pair of electric motor thrusters located respectively beneath each pontoon and the control bar comprises a pair of controls operable by hand, each control operable to control a respective thruster forwards or backwards. Alternatively, the thrusters may be remotely controlled. This configuration allows an operator to be pulled behind the control bar horizontally between the pontoons, snorkellers to be pulled behind the watercraft for recreational sightseeing and/or for remote-control rescue operations.

Structural arrangement for a water ski or underwater ski comprising essential mechanisms for significantly improving the user experience in underwater wake bodyboarding. The ski is characterized by the addition of novel and different attachable items that enable the ski to be used without a powered vehicle. The ski is also characterized in that it has various different items that can be attached to the cowling to improve the performance and comfort of the equipment, combined with a personalized steering system and an essential safety system, providing a model that is unique on the underwater ski/water ski market.

An unmanned vehicle capable of tunneling into soft materials, such as sand, comprises a hollow, bullet-shaped forward outer body with a first drive screw thread integrated into its exterior, a hollow cylindrical rear outer body with a second drive screw thread integrated into its exterior but threaded in the opposed direction of the first drive screw thread, and an inner body that is rotatably coupled to the inside of the forward and rear outer bodies via mechanical gears, and including directional control fins mounted on a housing at the rear end of the inner body.

A boat basically includes a hull, at least one propulsion unit, a heading sensor, a position sensor and a controller. The at least one propulsion unit is movably mounted to the hull, and has a propulsion axis. The heading sensor is configured to detect a heading of the boat. The position sensor is configured to detect a position of the boat. The controller is programmed to turn the at least one propulsion unit relative to the hull such that the propulsion axis moves away from a center point of the boat to correct the heading of the boat upon determining that the boat is drifting in a drift direction based on detection results of the heading sensor and the position sensor.

A propeller-powered propulsion system and method of remote-controlled waterway navigation is configured to navigate a waterway in a navigation route while being controlled remotely, and being tracked by a GPS system. The watercraft provides a watercraft body that carries a propeller subassembly having multiple propellers that operate independently of each other for variable propulsion and steering. A mobile communication device transmits a command signal to a receiver in the propeller subassembly. A microcontroller converts the command signal to a speed for each propeller, independently of the other. The propeller speeds create a disproportionate level of thrust from each propeller to enable remote controlled steering of the watercraft toward port and starboard directions, at variable speeds, and preprogrammed navigation routes. The mobile communication device also acquires location data of the watercraft body obtained by a GPS system. The microcontroller processes the location data to automate the navigation of the watercraft.

A trolling motor system is provided including a wired or wireless controller and a trolling motor assembly configured for attachment to a watercraft. The trolling motor assembly includes a steering assembly configured to steer a trolling motor housing based on a steering command received from the wired or wireless controller in a remote mode, a handle configured to enable a user to steer the trolling motor housing in a local mode, a processor, and a memory including computer program code. The computer program code is configured to, when executed, cause the processor to receive one or more steering commands from the wired or wireless controller, cause the steering assembly to steer the trolling motor housing based on the one or more steering commands, receive an indication to enter the local mode, and disable the steering assembly in response to receiving the indication to enter the local mode.

A controller associated with a propulsion device in a marine propulsion system is configured to send and receive controller area network (CAN) messages on a CAN bus and has computer-executable instructions stored thereon executed by a processor of the controller to perform a method. The method includes receiving a configuration instruction CAN message containing a new configuration value, determining that the configuration instruction CAN message is directed to itself, and then receiving a reboot CAN message. Upon determining that the reboot CAN messages directed to itself, the controller writes the new configuration value to memory and then controls a power relay to power off the controller, ignoring a key switch value associated with the propulsion device being on. The controller then responds to the key switch value to power the controller back on, and then loads the new configuration value into the working memory of the controller.

An amphibious pumping vehicle has a floatable vehicle body, a ground engaging propulsion structure, a fluid pump, a plurality of fluid nozzles comprising a first fluid nozzle connected by a fluid conduit to the fluid pump and at least one second fluid nozzle connected to the fluid conduit, a valve structure in the fluid conduit, the plurality of fluid nozzles and the valve structure co-operating to provide directional control and motive power for the vehicle when floating, and a power source configured to provide power to both the ground engaging propulsion structure and the fluid pump.

A method of dewatering a tailings lagoon retained by a dam comprising: excavating an excavation hole in the tailings lagoon; allowing water from surrounding tailings to enter the excavation hole; and pumping water in the excavation hole out of the excavation hole and discharging beyond a toe of the dam. Also disclosed is a method comprising: excavating a channel in a tailings lagoon from a shore of the tailings lagoon and floating a pontoon in water in the channel from the shore along the channel,wherein: excavating involves breaking down solid tailings in the tailings lagoon into a slurry using water and removing the slurry using a submersible slurry pump mounted on the pontoon.

A trolling motor system is provided including a wired or wireless controller and a trolling motor assembly configured for attachment to a watercraft. The trolling motor assembly includes a steering assembly configured to steer a trolling motor housing based on a steering command received from the wired or wireless controller in a remote mode, a handle configured to enable a user to steer the trolling motor housing in a local mode, a processor, and a memory including computer program code. The computer program code is configured to, when executed, cause the processor to receive one or more steering commands from the wired or wireless controller, cause the steering assembly to steer the trolling motor housing based on the one or more steering commands, receive an indication to enter the local mode, and disable the steering assembly in response to receiving the indication to enter the local mode.