A watercraft system including one or more air passageways and/or one or more water passageways is provided. The air passageways may extend from an upper surface of the watercraft, through the body of the watercraft, to an underneath surface of the watercraft. The water passageways may extend from an underneath forward or side portion on the watercraft, through the body of the watercraft, to a rear portion of the watercraft. The air and/or water passageways may be constricting from the inlets to the outlets so that the air and/or water is accelerated through the passageways during use of the craft. In this way, the release of the accelerated air and/or water decreases the craft's drag and provides the craft a forward thrust.

A watercraft system including one or more air passageways and/or one or more water passageways is provided. The air passageways may extend from an upper surface of the watercraft, through the body of the watercraft, to an underneath surface of the watercraft. The water passageways may extend from an underneath forward or side portion on the watercraft, through the body of the watercraft, to a rear portion of the watercraft. The air and/or water passageways may be constricting from the inlets to the outlets so that the air and/or water is accelerated through the passageways during use of the craft. In this way, the release of the accelerated air and/or water decreases the craft's drag and provides the craft a forward thrust.

A watercraft comprising a compressed air propulsion system is shown and described. The watercraft includes at least one propeller operatively connected to an air motor. Storage tanks supply compressed air having a pressure of at least 2000 psi to a pressure regulator that reduces the pressure and supplies air to an air control valve. User controls adjust the air control valve to adjust the flow rate of air to the air motor which in turn adjusts the direction and/or speed of rotation of the propeller. An on-board air compressor energized by a plurality of lithium iron phosphate batteries provides air to the air storage tanks when the pressure falls below a specified value. In certain examples, the electric and air propulsion system is used to replace a fossil fuel engine in an existing watercraft and can remain at sea longer than the existing watercraft.

A watercraft comprising a compressed air propulsion system is shown and described. The watercraft includes at least one propeller operatively connected to an air motor. Storage tanks supply compressed air having a pressure of at least 2000 psi to a pressure regulator that reduces the pressure and supplies air to an air control valve. User controls adjust the air control valve to adjust the flow rate of air to the air motor which in turn adjusts the direction and/or speed of rotation of the propeller. An on-board air compressor energized by a plurality of lithium iron phosphate batteries provides air to the air storage tanks when the pressure falls below a specified value. In certain examples, the electric and air propulsion system is used to replace a fossil fuel engine in an existing watercraft and can remain at sea longer than the existing watercraft.

The invention is an air propelled boat that has a triangular shaped hydroplaning monohull which has surface adhesion characteristics by means of a concave bottom hull. The invention also has aircraft-like control surfaces (5,6) for safety and control at high speeds. The invention is the only monohull marine craft which produces aerodynamic lift without wings and has air based propulsion (4), air based control surfaces and a unique concave planing hull.

The invention is an air propelled boat that has a triangular shaped hydroplaning monohull which has surface adhesion characteristics by means of a concave bottom hull. The invention also has aircraft-like control surfaces (5,6) for safety and control at high speeds. The invention is the only monohull marine craft which produces aerodynamic lift without wings and has air based propulsion (4), air based control surfaces and a unique concave planing hull.

The invention is an air propelled boat that has a triangular shaped hydroplaning monohull which has surface adhesion characteristics by means of a concave bottom hull. The invention also has aircraft-like control surfaces (5,6) for safety and control at high speeds. The invention is the only monohull marine craft which produces aerodynamic lift without wings and has air based propulsion (4), air based control surfaces and a unique concave planing hull.

The invention relates to a floating vessel for taking liquid samples, comprising a shell (2) that has a hull (3) to be submerged in a liquid medium below the water line and a superstructure (4) arranged above the water line; the vessel also comprises air propulsion means, means for taking and storing samples, and means for remotely controlling the air propulsion means and the sampling means; and the vessel further comprises a secondary detachable shell (32) provided with means for fixing to the shell (2) of the vessel, covering at least the hull of the vessel.

The invention relates to a floating vessel for taking liquid samples, comprising a shell (2) that has a hull (3) to be submerged in a liquid medium below the water line and a superstructure (4) arranged above the water line; the vessel also comprises air propulsion means, means for taking and storing samples, and means for remotely controlling the air propulsion means and the sampling means; and the vessel further comprises a secondary detachable shell (32) provided with means for fixing to the shell (2) of the vessel, covering at least the hull of the vessel.