Thrust with the minimum ejection of propellant by a levitating mass blocking the exhaust stream within the propellant producing structure. The reaction of accumulated propellant pressure between the levitating mass the hollow passageway and the propellant producing engine create thrust thus propelling the propellant producing engine and the vehicle in which it is mounted. Fuel consumption is decrease because a significant amount of propellant is not allowed to escape and is trapped in the vehicle's structure. The levitating mass is not physically attached to the propellant producing engine or the vehicle's structure. The rated pounds of thrust can be significantly increase and is determine by the strength of the magnetic field holding the levitating mass in place the composition of the hollow passageway the mechanical and structural components of the propellant producing engine.

Thrust with the minimum ejection of propellant by a levitating mass blocking the exhaust stream within the propellant producing structure. The reaction of accumulated propellant pressure between the levitating mass the hollow passageway and the propellant producing engine create thrust thus propelling the propellant producing engine and the vehicle in which it is mounted. Fuel consumption is decrease because a significant amount of propellant is not allowed to escape and is trapped in the vehicle's structure. The levitating mass is not physically attached to the propellant producing engine or the vehicle's structure. The rated pounds of thrust can be significantly increase and is determine by the strength of the magnetic field holding the levitating mass in place the composition of the hollow passageway the mechanical and structural components of the propellant producing engine.

The invention relates to a water sports device comprising an inflatable body component (1) having a longitudinal direction (L) and inflatable arms (8a, 8b) on a rear end, the arms being distanced from one another and orientated in the longitudinal direction (L), between which arms a receptacle (2) having an inner contour is formed, and comprising a drive component (7) having a tread surface (4) and an underwater surface (3), which drive component is formed with a complimentary contour (10a, 10b, 11) on two longitudinal sides (10a, 10b) that are distanced from one another and which component can be inserted into the receptacle (2) from the rear end, wherein the inner contour and the complimentary outer contour (10a, 10b, 11) form a connection to one another and a position of the inserted drive component (7) in the receptacle (2) is secured in the direction of the tread surface.

The invention relates to a water sports device comprising an inflatable body component (1) having a longitudinal direction (L) and inflatable arms (8a, 8b) on a rear end, the arms being distanced from one another and orientated in the longitudinal direction (L), between which arms a receptacle (2) having an inner contour is formed, and comprising a drive component (7) having a tread surface (4) and an underwater surface (3), which drive component is formed with a complimentary contour (10a, 10b, 11) on two longitudinal sides (10a, 10b) that are distanced from one another and which component can be inserted into the receptacle (2) from the rear end, wherein the inner contour and the complimentary outer contour (10a, 10b, 11) form a connection to one another and a position of the inserted drive component (7) in the receptacle (2) is secured in the direction of the tread surface.

A combined paddle and pump can be used to propel a small boat. The handle telescopes with a locking nut that may be loosened to allow extension and retraction of the handle. The handle is hollow throughout and a pair of check valves are provided. One check valve opens when the handle is extended and the other opens when the handle is retracted. When one check valve is open, the other is closed. When the distal end of the paddle is placed within a volume of water, extension and retraction of the handle results in a liquid first being sucked into the hollow interior of the handle and then propelled out of the handle.

A combined paddle and pump can be used to propel a small boat. The handle telescopes with a locking nut that may be loosened to allow extension and retraction of the handle. The handle is hollow throughout and a pair of check valves are provided. One check valve opens when the handle is extended and the other opens when the handle is retracted. When one check valve is open, the other is closed. When the distal end of the paddle is placed within a volume of water, extension and retraction of the handle results in a liquid first being sucked into the hollow interior of the handle and then propelled out of the handle.

A combined paddle and pump can be used to propel a small boat. The handle telescopes with a locking nut that may be loosened to allow extension and retraction of the handle. The handle is hollow throughout and a pair of check valves are provided. One check valve opens when the handle is extended and the other opens when the handle is retracted. When one check valve is open, the other is closed. When the distal end of the paddle is placed within a volume of water or exposed to atmospheric, extension and retraction of the handle results in a fluid first being sucked into the hollow interior of the handle and then propelled out of the handle. A seal assembly prevents debris from binding tubes of the handle.

A method of installing one or more anchors in an underwater substrate in a body of water including installing an anchor into the underwater substrate by rotating an anchor installation vehicle about a central axis Y to drive the anchor coupled to the anchor installation vehicle into the underwater substrate. The anchor installation vehicle includes a vehicle frame having a top end and bottom end, a plurality of arms extending outward from the vehicle frame, one or more rotational thrusters disposed at distal ends of the respective arms, and an anchor system that holds the anchor extending from the bottom end of the vehicle frame with the anchor aligned with a central axis Y.

A method of installing one or more anchors in an underwater substrate in a body of water including installing an anchor into the underwater substrate by rotating an anchor installation vehicle about a central axis Y to drive the anchor coupled to the anchor installation vehicle into the underwater substrate. The anchor installation vehicle includes a vehicle frame having a top end and bottom end, a plurality of arms extending outward from the vehicle frame, one or more rotational thrusters disposed at distal ends of the respective arms, and an anchor system that holds the anchor extending from the bottom end of the vehicle frame with the anchor aligned with a central axis Y.

A control system for a marine vessel that includes a drive source and an operator that receives an operation is able to switch a control mode of the drive source without providing an additional operator. An operation received by the operator when the drive source is resting is disabled, and a function of switching a control mode of the drive source is assigned to the operation of the operator that is received when the drive source is resting.