It sounds as though the vessels being monitored/tested all have antifouling, whereas the so called "reference panels" do not. The boats move at some speed whereas the reference panels
don't. This doesn't make it at all comparable, sounds like the result is given in advance.
In one of the quoted e.mails you posted, the boat owner slaims it keeps his props clean, whereas in another posted mail, the opposite is claimed. What should we believe?
Can you tell us a bit more about how the system works? You say that it causes the hull
to resonate, how does it find the right frequency for the different parts
of the hull
You still have not posted any documentation
with Lloyds approval, or any approvals of any kind from a neutral scientific source.
Regardless of how many transducers you mount, there is no way this will work on a hull with different layups, stringers, bulkheads etc, as every area will have a different resonant frequency.
Until you prove me wrong,(by a published test written by a neutral party) I will maintain my claim of this being a hoax, and reccomend that people not waste their time and money
on this kind of product.
Send the money
to a charity of your choice, and I will cast a spell on all the nasties in the water
around your boat, that will keep your boat clean. 50$ a month up to 50 feet, 75$ for anything bigger.