According to an example aspect of the present invention, there is provided a manoeuvring system comprising at least one unit comprising a channel having a longitudinal axis and comprising at least one water intake opening, at least one water nozzle arranged within the channel and configured to guide a water flow through the at least one water intake opening at an angle relative to the longitudinal axis and in a plane perpendicular or substantially perpendicular to the Earth's normal, at least one piping connected to the channel at a first end and connected to the at least one water nozzle at a second end, and at least one pump arranged between the first end and the second end and configured to control a water flow through the at least one water nozzle.

According to an example aspect of the present invention, there is provided a manoeuvring system comprising at least one unit comprising a channel having a longitudinal axis and comprising at least one water intake opening, at least one water nozzle arranged within the channel and configured to guide a water flow through the at least one water intake opening at an angle relative to the longitudinal axis and in a plane perpendicular or substantially perpendicular to the Earth's normal, at least one piping connected to the channel at a first end and connected to the at least one water nozzle at a second end, and at least one pump arranged between the first end and the second end and configured to control a water flow through the at least one water nozzle.

A self-propelling watercraft system is provided. The watercraft has a base with a plurality of sidewalls extending from the base to form a cockpit. The base also has a recess, where a pump can detachably connect to the hull within the recess. The pump has an intake valve on a first end and a nozzle on a second end that is opposite the first end. The intake valve can intake water. The nozzle can jettison water received in the pump from the intake valve and agitate water surrounding the nozzle.

A self-propelling watercraft system is provided. The watercraft has a base with a plurality of sidewalls extending from the base to form a cockpit. The base also has a recess, where a pump can detachably connect to the hull within the recess. The pump has an intake valve on a first end and a nozzle on a second end that is opposite the first end. The intake valve can intake water. The nozzle can jettison water received in the pump from the intake valve and agitate water surrounding the nozzle.

A device for redirecting the reverse jet stream flow created by a watercraft to provide a lateral thrust. A first and second main body of device is fixed to the deflector nozzle within first and second reverse nozzle outlet channels, respectively. Each main body has a channel disposed therein. Each channel has a bend that fluidly connects an inlet to an outlet. The reverse flow enters the respective inlet in a downward and backward direction with respect to deflector nozzle. The respective inlet and channel of main body bend the reverse flow such that, when the reverse flow exits the outlet, the reverse flow is primarily lateral.

A device for redirecting the reverse jet stream flow created by a watercraft to provide a lateral thrust. A first and second main body of device is fixed to the deflector nozzle within first and second reverse nozzle outlet channels, respectively. Each main body has a channel disposed therein. Each channel has a bend that fluidly connects an inlet to an outlet. The reverse flow enters the respective inlet in a downward and backward direction with respect to deflector nozzle. The respective inlet and channel of main body bend the reverse flow such that, when the reverse flow exits the outlet, the reverse flow is primarily lateral.

A retrofit propulsion apparatus attaches to an avian decoy to provide both propulsion and steering to the decoy under remote control by the user. The retrofit propulsion apparatus attaches to decoys with different keel geometries without the need to modify the retrofit propulsion apparatus for each decoy keel geometry. The apparatus includes a housing that contains electrical circuitry with control circuitry that couples to inboard water propulsion devices to provide thrust and steering to the decoy. A housing cover sealably attaches to the housing to seal the housing. The housing cover includes a slot that receives a vertical member of a decoy keel. The housing includes an angled channel that receives both a decoy with a decoy bottom member with vertical spaced apart sides and a decoy with a decoy bottom member with angled sides.

An upweller array configured to be disposed in a body of water and that has one or more upweller systems. The one or more upweller systems include a buoy configured to float on the surface of the body of water, a tether coupled to the buoy and a hydrofoil rotor coupled to the tether. The hydrofoil rotor is configured to be disposed in the body of water based on a length of the tether.

An upweller array configured to be disposed in a body of water and that has one or more upweller systems. The one or more upweller systems include a buoy configured to float on the surface of the body of water, a tether coupled to the buoy and a hydrofoil rotor coupled to the tether. The hydrofoil rotor is configured to be disposed in the body of water based on a length of the tether.

A jet pump includes a propulsion system including an impeller coupled to a rotatable shaft configured to receive torque from an engine and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the exhaust system is separate from the propulsion system. The propulsion system includes a water intake configured to take in water from a body of water, the water intake including an intake grate and a base, and an exhaust system including an exhaust flow path configured to direct exhaust from the engine to an exterior of the watercraft, wherein the base of the water intake is configured to be coupled to an exterior surface of a hull of the watercraft.