A marine vessel includes a hull assembly, and the hull assembly includes a deck assembly, a first battery assembly, a second battery assembly and an electric motor assembly. The deck assembly is contained within the hull assembly. The first battery assembly is located completely under the deck assembly. The second battery assembly is located completely under the deck assembly and is physically separate from the first battery assembly. The electric motor assembly receives electric power from the first battery assembly and the second battery assembly to propel the hull assembly through water during operation.

A flexible lifting tether system for lifting a marine vehicle or object is described which is capable of significantly improving the primary characteristics of an existing cable by enhancing load-carrying capabilities (e.g. in air), modifying the tether to have altered specific gravities in water, and relieving torsional stresses when in operation.

A carbon dioxide cycle power generation system includes storage collectively storing portions of carbon dioxide liquid and gas and a transfer connection selectively directing flow of the carbon dioxide through a turbine. The system cycles between different seawater depths in order to employ at least one of seawater pressure and seawater temperature in creating the carbon dioxide flow. Inlet/outlet control valves on variable volume tanks, positioned below movable pistons within the respective tank, selectively allow seawater into or out of a lower portion of the respective tank below the piston to pressurize the carbon dioxide therein relative to the carbon dioxide within the other tank when at depth rather than near the surface. Inhibited versus uninhibited heat transfer between storage portions and the seawater allows different seawater temperatures at depth and near the surface to create the carbon dioxide flow. Acoustic communications may be driven concurrent with the turbine.

A hands-free kayak steering system is a system that enables users to maneuver small watercrafts without requiring physical steering by the user. The system may include a bridging base, a first maneuvering mechanism, a second maneuvering mechanism, a user controller, and a portable power source. The bridging base supports the user controller for the user to steer the watercraft using the feet. The first maneuvering mechanism and the second maneuvering mechanism enable the system to adjust to fit on the watercraft. In addition, the first maneuvering mechanism and the second maneuvering mechanism generate thrust to propel the watercraft in the desired direction. The user controller enables the user to selectively engage the first maneuvering mechanism and the second maneuvering mechanism to steer the watercraft in the desired direction. Finally, the portable power source provides the voltage necessary to power both the first maneuvering mechanism and the second maneuvering mechanism.

A system for power and data transmission in a body of water to unmanned underwater vehicles comprises a floating surface station for generating electric energy and receiving and transmitting data; an underwater station connectable to at least one unmanned underwater vehicle; at least one submerged depth buoy; and an umbilical, which comprises a power transmission line and a data transmission line, is mechanically and electrically connected to the surface station and to the underwater station, and is mechanically coupled to the depth buoy so that the umbilical comprises a first umbilical section that is stretched between the underwater station and the depth buoy and a second umbilical section that extends loose between the depth buoy and the surface station.

Provided is an energy storage system for a marine vessel. The energy storage system includes a battery pack and a storage container (i) configured for housing the battery pack and other components and (ii) including an electrical interface for electrically coupling the battery pack to the vessel. The energy storage system also includes an air blast cooling system (i) mountable to a first section of the container and (ii) for cooling the battery pack and an air conditioning system configured for cooling the other components.

The present invention generally provides an anchor cap or a motor cap for mounting a monopod. The cap includes a navigation light power port typical of a marine vessel, such as a bass boat or speed boat. The cap would connect to the top of an anchor affixed to the marine vessel. The monopod can then provide power for mobile accessories, such as cameras and smart phones. The monopod may be fitted with extendable, bendable arms for mounting additional cameras or other electronic devices or for providing additional accessories. The box could also include other power outlets, including universal serial bus (USB) or standard power outlet ports.

A hands-free kayak steering system is a system that enables users to maneuver small watercrafts without requiring physical steering by the user. The system may include a bridging base, a first maneuvering mechanism, a second maneuvering mechanism, a user controller, and a portable power source. The bridging base supports the user controller for the user to steer the watercraft using the feet. The first maneuvering mechanism and the second maneuvering mechanism enable the system to adjust to fit on the watercraft. In addition, the first maneuvering mechanism and the second maneuvering mechanism generate thrust to propel the watercraft in the desired direction. The user controller enables the user to selectively engage the first maneuvering mechanism and the second maneuvering mechanism to steer the watercraft in the desired direction. Finally, the portable power source provides the voltage necessary to power both the first maneuvering mechanism and the second maneuvering mechanism.

A system for power and data transmission in a body of water to unmanned underwater vehicles comprises a floating surface station for generating electric energy and receiving and transmitting data; an underwater station connectable to at least one unmanned underwater vehicle; at least one submerged depth buoy; and an umbilical, which comprises a power transmission line and a data transmission line, is mechanically and electrically connected to the surface station and to the underwater station, and is mechanically coupled to the depth buoy so that the umbilical comprises a first umbilical section that is stretched between the underwater station and the depth buoy and a second umbilical section that extends loose between the depth buoy and the surface station.

A boat stabilizer system includes a first gyro stabilizer configured to be arranged inside a hull, a first fin stabilizer including a fin configured to be arranged outside the hull and move relative the hull, and a power transmission interconnecting the first gyro stabilizer and the first fin stabilizer. The power transmission is arranged to transfer energy derived from precession torque of the first gyro stabilizer to the first fin stabilizer to actuate the fin.