Installing the Ultra Series II Ultrasonic Antifouling system to your yacht will help to maintain the hull speed through the water and manoeuvrability, by reducing drag. Keeping the hull clear of growth reduces passage times and save fuel when using the boats engine. It can take up to 30% more fuel to push a fouled hull through the water.

The hull waterline length (LWL) is the main determining factor for the number of transducers that should be installed to the inside of the hull. Longer hulls will have a much larger underwater surface area to be considered for protection against fouling, so additional transducers will be required according to its length.

While sound waves are resonating throughout the hull form because the transducers are fixed to the inside of the hull, the stern gear (propellers, shafts and sail-drives) are acoustically isolated from the sound within the hull due to the seals used in their attachment.  In the proximity of a transducer, the ultrasound signal also dissipates out into the water in an 180o arc below the hull surface. Therefore, with correct positioning of transducers, the system can also help to some degree in keeping the stern gear clear, although not quite so effectively as the hull.

No through hull drilling is required, so the system can be installed with the boat in the water.

View the full Ultrasonic Antifouling product range

Recommended System Configurations

Up to 10m LWL:

Ultra 10 (one transducer) – price and options

For additional protection on 9 – 10m long keeled yachts that have an increased underwater surface area, installation of two transducers (Ultra 20 System) is recommended as shown below for a 10m – 16m yacht.

10m to 16m LWL:

Ultra 20 (two transducers) – price and options

16m to 22m LWL:

2 x Ultra 20 (four transducers) – price and options

Yachts over 22m:

For yachts over 22m contact us for a custom system using our high-power output systems – Ultra PowerPlus