Please select your home edition
Edition
Lancer Inflatables - BJ

Green antifouling technology - getting better every year

by Steve Hopper/Sail-World Cruising on 10 Feb 2013
With effective ultrasonic antifouling you may never have to do this again .. .
Green antifouling technology is the chemical-free alternative to traditional messy antifouling paint - it's more effective at clearing algae and barnacles but harmless to other marine life. Ultrasonic Works have just launched a new ground-breaking ClearHull antifouling system, and now tell of their spectacular results of winter-long laboratory tests.

The testing follows previous seasonal testing on trial yachts which proved the technology’s ability to maintain a clean hull.

The highly experienced electronics engineers and biologists at Ultrasonic Works performance tested the ClearHull ultrasonic antifouling system by pumping water from the Solent into control tanks, into which a simulated hull surface fitted with an Ultrasonics Works transducer and separate test slides were suspended. One of the tanks was set up without any protection and the other tanks were set up with various levels of ClearHull ultrasonic antifouling attached to the simulated hull surface.

Each of the protected test tanks had been set with different frequencies of ultrasonic sound protection to enable the engineers to test for different patterns and durations to find the most effective frequency to discourage algae growth. The testing simulated a moored vessel in the Solent and after two months of extensive testing the results were described as 'outstanding' with no fouling on the simulated hull or the suspended plates.

Unlike other ultrasonic testing, the test slides were not attached to the vibrating surfaces which simulate the hull of the yacht or boat, they were just suspended in the water, yet still did not attract fouling, clearly showing that Ultrasonic Works’ ClearHull antifouling properties travel through water and therefore offer a degree of protection to other parts of the boat, as well as the hull.



Algae and larvae float freely in the water and regularly come into contact with boat hulls. They spawn all year round making them a great pest to the marine industry, causing large amounts of drag, reducing speed and fuel economy. When they come into contact with the hull they will try and settle.

The ClearHull system works with a periodic sweep of frequencies giving the best chance at damaging the organelle of the algae and larvae. This sweep will vibrate the organelle of the larvae and algae causing them to become damaged or detached, the key factor in keeping the hull free of contamination. With the organelle of the algae and larvae damaged or failing they will either die in the case of most larvae, or sink.

The patent-pending ClearHull system is an intelligent, well-engineered product of exceptional quality and value, which is claimed to exceed the effectiveness of existing ultrasonic anti-fouling technology. ClearHull not only keeps the hull clear of algae and crustaceans it can also communicate the current status of the system together with battery levels, water temperature etc. to a computer, mobile phone or tablet. In this way, ClearHull takes ultrasonic antifouling to a new professional level and, at a similar price to other less advanced ultrasonic systems, offers remarkable value for money.

Ultrasonic Works new ultrasonic antifouling system brings design engineering together with a deep understanding of maritime algae and crustaceans. Having previously designed and produced advanced water treatment systems for commercial and industrial applications, the team at Ultrasonic Works has now developed and adapted this technology to manufacture ClearHull - the ‘next generation’ antifouling system, specifically designed for the marine environment. Further information from www.ultrasonicworks.com

BIA 2016 Sydney Boat Show 660x82InSunSport - NZNorth Technology - Southern Spars

Related Articles

Rio 2016 - The Qualification Games - Part 2
Yachting NZ's refusal to nominate in three classes won in the first round of 2016 Olympic Qualification is unprecedented Yachting New Zealand's refusal to nominate in three classes won in the first round of 2016 Olympic Qualification is without precedent. Subject to Appeal, the Kiwis have signaled that they will reject 30% of the positions gained in the ISAF World Sailing Championships in Santander in 2014.
Posted on 22 May
Gladwell's Line - World Sailing changes tack after IOC windshift
Over the past year, we've given the International Sailing Federation (now re-badged as World Sailing) a bit of stick Over the past year, we've given the International Sailing Federation (now re-badged as World Sailing) a bit of stick. Every blow well earned over issues such as the pollution at Rio, the Israeli exclusion abomination plus a few more. But now World Sailing is getting it right.
Posted on 21 May
Rio 2016 - The Qualification Games - Part 1
Antipodean selection shenanigans aside, the Qualification system for the Rio Olympics appears to be achieving its goals Antipodean selection shenanigans aside, the Qualification system for the Rio Olympics appears to be achieving goals set in the Olympic Commission report of 2010. Around 64 countries are expected to be represented in Rio de Janeiro in August. That is a slight increase on Qingdao and Weymouth, but more importantly a full regional qualification system is now in place
Posted on 19 May
Taming the beast-a conversation with Stuart Meurer of Parker Hannifin
While AC72 cats were fast, they difficult to control, so Oracle partnered with Parker Hannifin to innovate a better way. If you watched videos of the AC72s racing in the 34th America’s Cup (2013), you’re familiar with the mind-boggling speeds that are possible when wingsail-powered catamarans switch from displacement sailing to foiling mode. While foiling is fast, there’s no disguising the platform’s inherent instability. Now, Oracle Team USA has teamed up with Parker Hannifin to innovate a better way.
Posted on 18 May
From foiling Moths to Olympic starting lines-a Q&A with Bora Gulari
Bora Gulari’s is representing the USA at the Rio 2016 Olympics in the Nacra 17 class, along with teammate Louisa Chafee. Bora Gulari (USA) has made a strong name for himself within high-performance sailing circles, with wins at the 2009 and 2013 Moth Worlds. In between, he broke the 30-knort barrier and was the 2009 US SAILING Rolex Yachtsman of the Year. His latest challenge is representing the USA at the Rio 2016 Olympics in the Nacra 17 class as skipper, along with his teammate Louisa Chafee.
Posted on 12 May
Concern for Zika at Rio Olympics is now deadly serious
Alphabet soup is one description that has thus far not been used for either Guanabara Bay, Alphabet soup is one description that has thus far not been used for either Guanabara Bay, or the Rio Olympics. Many others have, and they were apt, but things have changed. So here now we have a situation where one man, Associate Professor Amir Attaran, who does have a more than decent string of letters after his name, is bringing nearly as many facts to bear as references at the article's end
Posted on 12 May
The importance of being Alive
Since buying the stunningly pretty Reichel-Pugh canting keel 66-footer, and re-naming her Alive, Since buying the stunningly pretty Reichel-Pugh canting keel 66-footer, and re-naming her Alive, the team have lined up for a lot of things, won plenty and nabbed a record, as well. She’s presently in a yard in the Philippines having a minor refit in readiness for the Australian season. It will commence with the upcoming Brisbane to Keppel and then head sharply into this year’s Hobart.
Posted on 10 May
Hoisted on their own petard
Now it was not that long ago that we wondered if there were some genuinely Shakespearean elements beginning to appear... Now it was not that long ago that we wondered if there were some genuinely Shakespearean elements beginning to appear in World Sailing’s premier event, the Sailing World Cup. In that time, a flurry of material has espoused all manner of joyous points including travel grants and prize money. That’s terrific and the hope is that somehow this will overcome the tyranny of distance for Melbourne
Posted on 9 May
Zhik - The brand born of a notion, not its history
here is probably every reason that ocean rhymes with notion. Zhik’s tagline is officially marketed as Made For Water There is probably every reason that ocean rhymes with notion. Zhik’s tagline has been officially marketed as Made For Water, and this is precisely what the company has done for the last eight years before the succinct and apt strapline came from out of R&D and into mainstream visibility.
Posted on 8 May
So, thou doth protest too much, me thinks
And no, we’re not off to analyse Hamlet right away. There’ll be no surtitles popping up on the top of your screen And no, we’re not off to analyse Hamlet right away. There’ll be no surtitles popping up on the top of your screen about now. At any rate, it is simply an adaptation of Lady Gertrude’s original line. We merely seek to use it as a way to demonstrate that when there is a lot of brouhaha going on, the smoke screen ultimately ends up as a lovely, colourful flag as to the real intent behind it.
Posted on 4 May