A robotic jellyfish comprises a torque reaction engine and a jellyfish body, wherein the torque reaction engine cyclically oscillates and causes a wave to propagate across the jellyfish body, accelerating thrust fluid and propelling the robotic jellyfish.

The present invention relates to an apparatus and method for the localized capture, storage and specialized use of power generated from natural sources, such as solar power or hydropower. The apparatus can be used, for example, on a deck or a side of a marine vessel, or on a land-based structure, where there is a requirement for managed power generation and storage.

The present invention relates to an apparatus and method for the localized capture, storage and specialized use of power generated from natural sources, such as solar power or hydropower. The apparatus can be used, for example, on a deck or a side of a marine vessel, or on a land-based structure, where there is a requirement for managed power generation and storage.

An energy storage apparatus including a spherical rotating member having permanent magnets and uniquely-identifiable location-defining elements, a plurality of coils, a controller operably coupled to the plurality of coils, a power source, and a location sensing apparatus operable to detect the plurality of location-defining elements. The controller may compare time-sequential information from the location sensing apparatus to determine a rotational axis and a rotational speed of the rotating member, operate the coils to change the rotational axis speed of the rotating member, increase energy stored by the rotating member by increasing the rotational speed by operating the coils to generate magnetic fields that interact with the permanent magnets, and withdraw energy by operating the coils to generate magnetic fields that interact with the magnetic fields of the permanent magnets to produce induced current in the coils and directing the induced current to a power delivery location.

A power transmission device is configured to transmit power underwater to an underwater vehicle having a power reception coil. The power transmission device includes a power transmission coil configured to transmit power to the power reception coil through a magnetic field, a power transmission unit configured to transmit an alternating current voltage having a frequency a 10 kHz or lower to the power transmission coil, and a first capacitor connected to the power transmission coil and configured to form a resonance circuit resonating at the frequency with the power transmission coil.

Techniques are disclosed for systems and methods to provide visually correlated radar imagery for mobile structures. A visually correlated radar imagery system includes a radar system, an imaging device, and a logic device configured to communicate with the radar system and imaging device. The radar system is adapted to be mounted to a mobile structure, and the imaging device may include an imager position and/or orientation sensor (IPOS). The logic device is configured to determine a horizontal field of view (FOV) of image data captured by the imaging device and to render radar data that is visually or spatially correlated to the image data based, at least in part, on the determined horizontal FOV. Subsequent user input and/or the sonar data may be used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

Techniques are disclosed for systems and methods to provide visually correlated radar imagery for mobile structures. A visually correlated radar imagery system includes a radar system, an imaging device, and a logic device configured to communicate with the radar system and imaging device. The radar system is adapted to be mounted to a mobile structure, and the imaging device may include an imager position and/or orientation sensor (IPOS). The logic device is configured to determine a horizontal field of view (FOV) of image data captured by the imaging device and to render radar data that is visually or spatially correlated to the image data based, at least in part, on the determined horizontal FOV. Subsequent user input and/or the sonar data may be used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

A mechanical propulsion system of a watercraft includes one or more propeller or impeller units operable to provide thrust for forward cruise. Disclosed herein is a non-mechanical marine propulsion system that utilizes heating-elements installed at submerged-regions of bow and stern of a waterborne watercraft in order to generate a pressure-difference between the bow and the stern by virtue of boiling and displacing surrounding water, and thus provide a net thrust to propel, steer or brake the watercraft. Further, a non-mechanical active roll stabilization system also based on the above concept is disclosed.

A mechanical propulsion system of a watercraft includes one or more propeller or impeller units operable to provide thrust for forward cruise. Disclosed herein is a non-mechanical marine propulsion system that utilizes heating-elements installed at submerged-regions of bow and stern of a waterborne watercraft in order to generate a pressure-difference between the bow and the stern by virtue of boiling and displacing surrounding water, and thus provide a net thrust to propel, steer or brake the watercraft. Further, a non-mechanical active roll stabilization system also based on the above concept is disclosed.

An underwater propulsion device is disclosed comprising two sleeves for fitting around each of a user's lower legs, with each sleeve mounting a propulsion unit, and the sleeves being connectable by a bar between them during underwater operation of the device by the user.