The underwater part of the vessel will remain clean, which will reduce the resistance,
resulting in increased speed and decreased fuel consumption. It also reduces cleaning time and costs when the vessel is hauled out for maintenance.
When the vessel has a paddle wheel log, it will not need to be removed for regular cleaning.
When the control box is powered up, a red control light on the box starts shining. By
activating the switch it will shine green and the transducer will produce a slight ticking sound. The ultrasonic waves will prevent algae growth within the direct vicinity of the ship’s hull and therefore also will prevent different types of barnacles from attaching. During the mooring period, a slight slime film may build up, which will be removed underway by the motion of the boat through the water.
Foto shipsonic water
How  it Works

The Shipsonic Ultrasonic System is specially designed to prevent algae build-up on the hull below the waterline.
The unit produces ultra-sonic waves, which travel through the polyester or metal hull into the water and prevent the build-up of algae on the ship’s hull. The Shipsonic consists of a powered electronic control box and a transducer, which is connected via a three-core cable.
The transducer is installed inside the ship’s bilge in a holder, which is glued to the innersurface of the vessel’s hull.
Power boats
Sailing Yachts
Choose your type of boat...
Mounting the transducer:
In summary, different versions of the Ultrasonic antifouling units should be sited in
accordance with the drawings on the pages: Powerboat - Sailingship - Catamaran
The transducer(s) must be placed below the waterline.
Make sure that you do not site the transducer on any false floor or internal skin such as that which exists in balsa/foam cored hulls. It is very important that it is mounted on the actual external part of the hull (polyester).

For technical specifications see:
Shipsonic technical specifications 2010.pdf