An apparatus for exchanging kinetic energy between a fluid and a structure moveable relative to the fluid and connected to the apparatus, including a channel enclosed by a channel wall connected with the structure, and adapted to guide the fluid, at least four identical blades moveable within the channel and being connected to an energy converter coupled with the structure.

An apparatus for exchanging kinetic energy between a fluid and a structure moveable relative to the fluid and connected to the apparatus, including a channel enclosed by a channel wall connected with the structure, and adapted to guide the fluid, at least four identical blades moveable within the channel and being connected to an energy converter coupled with the structure.

A wave-powered water vehicle includes a surface float, a submerged swimmer, and a tether which connects the float and the swimmer, so that the swimmer moves up and down as a result of wave motion. The swimmer includes one or more fins which interact with the water as the swimmer moves up and down, and generate forces which propel the vehicle forward. The vehicle, which need not be manned, can carry communication and control equipment so that it can follow a course directed by signals sent to it, and so that it can record or transmit data from sensors on the vehicle.

A wave-powered water vehicle includes a surface float, a submerged swimmer, and a tether which connects the float and the swimmer, so that the swimmer moves up and down as a result of wave motion. The swimmer includes one or more fins which interact with the water as the swimmer moves up and down, and generate forces which propel the vehicle forward. The vehicle, which need not be manned, can carry communication and control equipment so that it can follow a course directed by signals sent to it, and so that it can record or transmit data from sensors on the vehicle.

An ocean exploration apparatus including: a probe body; a buoyancy adjusting section that adjusts buoyancy generated in the probe body; a posture adjusting section that adjusts a posture of the probe body; a position information acquiring section that acquires position information of the probe body; a wing section that moves the probe body using a lifting force applied from seawater; a sensor section that is provided in the probe body and measures an electromagnetic field; and a control section that controls operations of the buoyancy adjusting section, the posture adjusting section, the position information acquiring section, and the sensor section according to predetermined conditions.

An ocean exploration apparatus including: a probe body; a buoyancy adjusting section that adjusts buoyancy generated in the probe body; a posture adjusting section that adjusts a posture of the probe body; a position information acquiring section that acquires position information of the probe body; a wing section that moves the probe body using a lifting force applied from seawater; a sensor section that is provided in the probe body and measures an electromagnetic field; and a control section that controls operations of the buoyancy adjusting section, the posture adjusting section, the position information acquiring section, and the sensor section according to predetermined conditions.

The invention pertains to a vessel comprising a propulsion system comprising both an aerodynamic spinning actuator and a hydrodynamic spinning actuator both being used concurrently to move the vessel in sustainable low emission operating conditions. The invention also pertains to a method for operating such a system.

The invention pertains to a vessel comprising a propulsion system comprising both an aerodynamic spinning actuator and a hydrodynamic spinning actuator both being used concurrently to move the vessel in sustainable low emission operating conditions. The invention also pertains to a method for operating such a system.

An energy collecting method includes: a step in which a floating body, which constitutes a power generation system, stores energy by the floating body generating power while automatically sailing; and a step in which an energy transport ship collects energy from the floating body near an edge of a sea area in which the floating body automatically sails.

An energy collecting method includes: a step in which a floating body, which constitutes a power generation system, stores energy by the floating body generating power while automatically sailing; and a step in which an energy transport ship collects energy from the floating body near an edge of a sea area in which the floating body automatically sails.