On my 42ft Catalina
Mk1 I have installed a 4 transducer
ultrasonic system and The Barnacle RID copper electrode system.
I have an associate degree in Electronics
Engineering & have been practicing in the aero space industry for over 40 years.
I have owed the vessel for 3 years and I am completely competant in all of its electrical
Both anti foul systems were installed as per the manufacturer's spec.
Both systems have been operating on my boat
for over 16 months.
They were installed before a complete handstand clean & anti foul.
In a nut shell they really do not work
I recently dived under the vessel & emptied a tank of air scraping hard shell barnacles
off the hull
There was no evidence on any part of the hull that showed reduced growth of hard shell infestation.
I hope my observations help.
As the hardstand
owner stated to me.
" If such systems worked he would have been out of business 20 years ago"
I would like to here from other users that have such systems installed on vessels moored in the Port Hacking which has a huge reputation for barnacle attack.