Superior antifouling for boat performance & low maintenance, your finances, and the environment!

How Our Antifouling Works So Well

The short video infographic here, shows how this type of antifouling works on a boat hull. The same effect works on propeller shafts to propellers, and rudders.

There’s a lot of science behind these antifouling systems, yet they are relatively simple to install. Once installed, you can forget about them except for an occasional check they are working. By the end of reading this page you will be an expert in the installation and function of these antifouling systems, confident to install your own, and hopefully avoid the need to paint your boat in biocides or other leaching paints.The best, and only time, to install these antifouling systems is with a clean hull, so make the last lift or dry-dock this season the last one you will need to perform and without antifouling coatings.

Antifouling for Every Size of Boat

The components are modular and scalable to any size of boat. Select your boat type with corresponding specification from the selection below, or contact us for advice and a customised design.


Using 11.5V to 30V DC onboard

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tugs, ferries, & large yachts

Professional series using 22V to 30V DC onboard, and with harsh environments

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Freighters and military vessels

Professional series using 22V to 30V DC onboard, and with harsh environments

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Just contact us for a free design survey

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Installation in An Afternoon

Just Two Antifouling Components !

There’s really only two types of component in an ultrasonic antifouling system:

  1. one (or more) control box (for power & signal generation), and
  2. one (or more) transducers (ultrasonic speakers)

The system is modular and may be expanded e.g. if it is noticed extra ultrasound is required on a part of the hull or surfaces then additional transducers may be used or existing transducers moved (however the epoxy glue used to bond the transducer is usually very strong and will need careful removal. (It might be easiest to obtain an additional transducer than move an existing one.)


Antifouling Control Box(es)

Place the control box in a convenient location. Its position has no effect on the ultrasound. What is convenient? Hidden away for aesthetic reasons, close to an easily connected power source, yet accessible in case of troubleshooting, repair, upgrade, or removal.Some control boxes are usually quite tolerant of the wet, humid, hot environments around engines. There are no maintainable parts, and the only access that is generally required is to view the indicator lamps.Each control box may support more than one transducer. When there are many transducers, group these with their control box or a larger capacity control box.See the examples below.

Antifouling Transducer(s)

Place the transducer(s) such that the effect protects the entire surface from fouling. On a small boat, one transducer is enough; on larger yachts, multiple transducers are required. Each transducer is optimised to affect a surface of 10m radius, which equates to approximately 300 m2.You will have many suitable locations on your boat. Consider those locations with the most straightforward internal cable routing, access to work, and position that is out of the way of other functions. Once installed, access is unlikely to be required, especially if you can still observe the indicator light on each transducer and control box to confirm functioning. Therefore, it might be less work and easier to install multiple transducers rather than struggle to access awkward locations.See the examples below.

There is no difference between installing this antifouling on sailing yachts, motor yachts, superyachts, or commercial vessels except consideration of the the typical hull shapes. For example, sailing yachts usually have deep keels, whilst motor yachts may have a flatter hull shape and multiple propellers.

We are happy to help you design your system, request a free antifouling survey.

The factors to consider when designing your setup are:

  • The length and shape of hull underwater. Longer boats require more transducers; multihulls require separate transducers etc.
  • The beam of the boat. As boats get longer, they also get wider and therefore more transducers are needed to cover the width and length of the hull.
  • Equipment and items, e.g. rudders, sail drives, propellers, attached to the hull which might alter or shadow the ultrasound. Bias the transducer placement closer to such items.
  • Structure of the hull, i.e. rigid bulkheads may restrict the ultrasonic waves and require transducer placement more biased towards these locations; double-hulls are not suitable unless access is possible to the inside of the outermost layer.
  • The power available e.g. whether shore power is to be used or battery.
  • Internal accessibility and cable routing for each transducer and the control/ signal box and access to power. For an easier install & future access, avoid difficult locations and cable routing.

In the diagrams just here we indicate where each control box (as a blue square) and each transducer (as a green circle) might be installed on boats from 10m to 40m+. When there is more than one transducer, then the installation is usually on opposite sides of the hull staggered along the length. If in doubt, then symmetrical spacing is also fine. Generally seek to cover each side and each end of the hull with particular concentration where there may be keels, rudders, and propellers which is why you may notice we position transducers more to the rear in some cases.

Remember, all transducers are fitted inside the hull, not on the outside.

Positioning on Sailing yachts

Here’s some indicative positions for antifouling transducers on, say, sailing yachts. A keel can shadow certain parts of the hull, therefore transducers are placed with this in mind.

antifouling installation on a sailing boat yacht

The key point here is to stagger the position of the antifouling transducers along opposite sides of the hull just off the centre-line.

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Positioning on Motor boats

Here below are some indicative positions for antifouling transducers on, say, motor boats which often have multiple propellers. The considerations are normally the flatter hull shape though there might also be water inlets, sea chests, water coolers to protect too.

antifouling installation on a motor boat yacht

Twin screw vessels should preferably use an extra antifouling transducer above the aft running gear, as you see in the diagram above.

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Take a look at the graphics below and you will probably be able to plan the positioning of the control box and each transducer yourself.

We can also easily help you design your system; it’s simpler than you may think. We are happy to take your sketch, layout diagram, photos, videos, or even live video stream to help you.

Suitable Hull Materials

An important note, ultrasonic technology works with almost all homogeneous (uniform density) hull materials. Glass reinforced plastic, steel, and aluminium work well. Wood and concreate is not a suitable hull material for ultrasonic antifouling since it contains many voids and variable density.Dense, uniform, homogeneous materials usually permit the sound waves to travel to the outside surface most effectively.The transducer causes vibration in materials but when there are multiple voids in the material, the sound is internally reflected and attenuated within the material excessively.The transducer has to be in firm contact with the inner side of the hull skin. The transducer needs a direct effect on the hull surface, so proper installation is vital.

We're Here to Help You Now

System installation is straightforward. However, we are here for you anytime, for questions regarding devices, installation, specifications, options, issues, concerns, or just a chat.

Especially in these socially safer times, you can chat to us on WhatsApp by voice or video, send us video or photos of your boat, plans, and discuss the ideal selection of items, positioning, installation, and maintenance now and in the future.

Frequently Asked Questions

Are Fish affected?

No, fish are happy to carry on swimming around the hull. The ‘loudness’ also does not carry far. By design, the sound is limited to the near-surface of the transducer.

Is It Environmentally Friendly?

Yes. 100%. No pollutants are deposited into the marine eco system. Even some packaging is eco-friendly.

Does our antifouling affect Echo Sounders?

No. Both work on different frequencies.

Why do we bond transducers direct to the hull?

To transmit maximum power to the hull and stop transducers coming loose through vibration. Screw fixes can work themselves free.

What is the power consumption?

That depends on the system size. Full specifications are available on the system information pages.

The power consumed is low. For example, one system uses just 3W per transducer on 12V DC & 24V DC inputs.

Can I make my own transducer cables?

Yes. The signal cable is quite simple. For example: some systems use RG6 satellite cable with plated brass F-type cable connectors. Especially, although we can supply 5m and 10m long cables on larger vessels these will not be long enough.

What is maximum transducer cable length?

We now have new driver technique to allow up to 60m using RG6 cable.

Do I have to replace a fuse if there’s a fault?

No. We use electronic fuses in both inlet and transducer drive circuits. They will automatically reset after fault removed.

Can you use our system to protect sea chests?

Yes no problem. Ask for further information. We can help with special adapters and placement of transducers.

Do you have system for commercial vessels?

Yes. There are systems for leisure/ pleasure craft as well as commercial vessels of all sizes. Some systems have even been designed for miltary users and tested to a higher temperature & vibration range.

Do I have to Dry Dock My Ship to Install the System?

No. Antifouling systems can be fitted whilst the vessel is afloat. There’s usually no cutting or penetrations required. All the components are fitted on the dry side of the hull, coolers or pipework.

What’s the return on investment?

Normally fantastic, and it doesn’t pollute our planet like biocides and other antifouling coatings do. The return can be just one or two seasons, or less. Compare the cost of current antifouling paints which requires lifting the boat, removing old coatings, sanding, applying multiple layers of new coatings & sanding, the labour & services employed, loss of use of the vessel, and that such coatings immediately start to degrade.

Once installed with a clean hull, an ultrasonic antifouling system provides continuous protection year after year at low power and therefore optimum boat performance without lifting the boat.

Motor vessels, and commercial shipping will obtain significant benefit on vessel journey time, down-time for maintenance, and fuel saved.

Do ultrasonics adversely affect marine mammals?

No. The waves are not at a frequency or pressure that adversely affects e.g. whales and dolphins.

Can I fit the antifouling myself?

Yes. Many customers do their own install. We provide full instructions. Larger vessels the ships engineer is normally happy to install.

Will Antifouling Work on My Vessel?

Ultrasonic antifouling will work on any solid metal or composite hull, pipe or component. It does not work on wooden hulls. If your vessel has a foam or wood cored GRP sandwich construction, then a section of the inner skin and core needs to be removed and the gap built up with solid GRP to enable the transducer to emit ultrasonic waves to the outer shell.

Do I Still Need to Use Antifouling Paint If I Fit Ultrasonic Antifouling?

No not for antifouling. The ultrasonics are doing the antifouling. However, you may still need to protect the hull with a suitable inert, protective coating for impact resistance and asthetic reasons. Ultrasonic Antifouling doesn’t protect against metallic corrosion or GRP osmosis.

How Do Ultrasonics work?

Check our detailed fabulous blog post, linked here: Ultrasonic Antifouling ~ Everything You Need To Know


Take a look at our article Antifouling Options

Antifouling including ultrasonics Antifouling options