The invention relates to a hydrofoil system for a marine vessel comprising a hull (101), the hydrofoil system comprising at least one pair of foldable hydrofoils (109, 110) which are pivoted relative to the marine vessel, wherein each hydrofoil (109, 110) is controllable by at least one actuator (930) for displacement of the at least one pair of foldable hydrofoils in a lateral direction of the marine vessel between a stowed position and a deployed position. Each foldable hydrofoil (109, 110) is hinged relative to the hull above the water line on opposite sides of the marine vessel. A first portion (111) of each hydrofoil extends adjacent the hull (101) towards the water line of the marine vessel when the hydrofoil is in the stowed position and a second portion (112) comprises a free second end extending under the hull. The second portion (112) is submerged and arranged in a lateral recess (107) behind a stepped hull portion (106) of the marine vessel when the hydrofoil is in the stowed position.

The invention relates to a hydrofoil system for a marine vessel comprising a hull (101), the hydrofoil system comprising at least one pair of foldable hydrofoils (109, 110) which are pivoted relative to the marine vessel, wherein each hydrofoil (109, 110) is controllable by at least one actuator (930) for displacement of the at least one pair of foldable hydrofoils in a lateral direction of the marine vessel between a stowed position and a deployed position. Each foldable hydrofoil (109, 110) is hinged relative to the hull above the water line on opposite sides of the marine vessel. A first portion (111) of each hydrofoil extends adjacent the hull (101) towards the water line of the marine vessel when the hydrofoil is in the stowed position and a second portion (112) comprises a free second end extending under the hull. The second portion (112) is submerged and arranged in a lateral recess (107) behind a stepped hull portion (106) of the marine vessel when the hydrofoil is in the stowed position.

A robot (2) and method for underwater monitoring and maintenance of a ship's hull (1) when the ship is underway, are described. The robot (2) comprises a main body (5), a connector (21) for connecting the robot (2) to a cable (3) for towing the robot (2), a resting base (13) adopted to rest against the ship's hull (1), one or more hydrofoil(s) (6, 7) arranged perpendicular to the length axis of the main body (5), and a rudder (8) arranged at the front part of the main body (5), the main body (5) being a straight and elongated body having a length to width ratio of 5 or more, where the length of the hydrofoil(s) (6, 7) as seen perpendicular to the main body (5), is/are longer than the width of the main body (5), and where the connector (21) for the cable (3) is arranged at one end of a hydrofoil (6), or at an arm extending parallel with the one or more hydrofoil(s).

A robot (2) and method for underwater monitoring and maintenance of a ship's hull (1) when the ship is underway, are described. The robot (2) comprises a main body (5), a connector (21) for connecting the robot (2) to a cable (3) for towing the robot (2), a resting base (13) adopted to rest against the ship's hull (1), one or more hydrofoil(s) (6, 7) arranged perpendicular to the length axis of the main body (5), and a rudder (8) arranged at the front part of the main body (5), the main body (5) being a straight and elongated body having a length to width ratio of 5 or more, where the length of the hydrofoil(s) (6, 7) as seen perpendicular to the main body (5), is/are longer than the width of the main body (5), and where the connector (21) for the cable (3) is arranged at one end of a hydrofoil (6), or at an arm extending parallel with the one or more hydrofoil(s).

In an underwater glider, stability and versatility can be enhanced by the use of a high wing design. In a high wing design, a centerline of the wings extending from the sides of the body of the glider are located above a relative centerline of the body of the glider. The relative centerline of the wings may rise continuously from a region where the wings attach to the body to respective ends of the wings. In particular for a blended wing glider, a top surface of the glider is level in a line extending between ends of each wing.

In an underwater glider, stability and versatility can be enhanced by the use of a high wing design. In a high wing design, a centerline of the wings extending from the sides of the body of the glider are located above a relative centerline of the body of the glider. The relative centerline of the wings may rise continuously from a region where the wings attach to the body to respective ends of the wings. In particular for a blended wing glider, a top surface of the glider is level in a line extending between ends of each wing.

A propulsion device for a hydrofoil craft includes: a hydrofoil configured to be disposed in water; and a water jet thruster that is disposed in front of the hydrofoil and ejects a water flow rearward from an ejection port, wherein an upper surface of a rear portion of the hydrofoil is slanted downward toward rear, and the hydrofoil and the water jet thruster are configured such that at least part of the water flow passes above the rear portion of the hydrofoil.

The present invention provides an aquatic moving body configured to move in a state where a main body portion is floated above a water surface, comprising: a first hydrofoil and a second hydrofoil disposed along a left-and-right direction of the aquatic moving body and provided in the main body portion so as to be able to change elevation angles independently of each other; a first propulsion unit provided at an end portion of the first hydrofoil and configured to generate a propulsive force; and a second propulsion unit provided at an end portion of the second hydrofoil and configured to generate a propulsive force, wherein a first partition wall is provided between the first hydrofoil and the first propulsion unit, and a second partition wall is provided between the second hydrofoil and the second propulsion unit.

The present invention provides an aquatic moving body configured to move in a state where a main body portion is floated above a water surface, comprising: a first hydrofoil and a second hydrofoil disposed along a left-and-right direction of the aquatic moving body and provided in the main body portion so as to be able to change elevation angles independently of each other; a first propulsion unit provided at an end portion of the first hydrofoil and configured to generate a propulsive force; and a second propulsion unit provided at an end portion of the second hydrofoil and configured to generate a propulsive force, wherein a first partition wall is provided between the first hydrofoil and the first propulsion unit, and a second partition wall is provided between the second hydrofoil and the second propulsion unit.

The disclosure includes systems, assemblies, sub-assemblies and methods for securely attaching components of a hydrofoil for use in water sports. The hydrofoil may include a mast assembly and one or more wings. At least some components of the hydrofoil may be assembled using toolless connections. The toolless connections may prevent relative axial and/or radial movement between components of the hydrofoil.